WO2020009368A1 - Dishwasher and method for controlling same - Google Patents

Dishwasher and method for controlling same Download PDF

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Publication number
WO2020009368A1
WO2020009368A1 PCT/KR2019/007743 KR2019007743W WO2020009368A1 WO 2020009368 A1 WO2020009368 A1 WO 2020009368A1 KR 2019007743 W KR2019007743 W KR 2019007743W WO 2020009368 A1 WO2020009368 A1 WO 2020009368A1
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WO
WIPO (PCT)
Prior art keywords
arm
washing
injection
washing water
current
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Application number
PCT/KR2019/007743
Other languages
French (fr)
Korean (ko)
Inventor
손창우
배재광
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2020009368A1 publication Critical patent/WO2020009368A1/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details

Definitions

  • the present invention relates to a dishwasher and a control method thereof, and more particularly, to a dishwasher for washing dishes or cooking utensils by controlling the rotation of a nozzle to which the washing water is sprayed and spraying the washing water.
  • the dishwasher is a household appliance that cleans dirt, such as food waste, which is buried in a dish or cooking utensils (hereinafter, 'to be cleaned') by high-pressure washing water sprayed from a spraying arm.
  • the dishwasher generally consists of a tub forming a washing chamber and a sump mounted on the bottom of the tub to store the washing water. Then, the washing water is moved to the injection arm by the pumping action of the washing pump mounted inside the sump, and the washing water moved to the injection arm is injected at high pressure through the injection hole formed in the injection arm. Then, the washing water sprayed at a high pressure hit the surface of the cleaning object, the dirt on the cleaning object is dropped to the bottom of the tub.
  • Korean Patent Laid-Open Publication No. 10-2015-0016157 describes a dishwasher having a plurality of spray arms and washing dishes received by spraying the washing water from the spray arms.
  • the injection arm is configured to rotate using a pressure at which the washing water flowing into the injection arm is injected without a separate driving device.
  • the injection arm has a different pressure range in which the washing water is sprayed for each spray direction as the washing water injection port is inclined at a predetermined angle, a difference in washing performance may occur according to the rotation direction.
  • the injection arm is configured to change the rotation direction when it is stopped after the injection, the last rotation direction cannot be confirmed, so that the rotation direction at a predetermined time point cannot be confirmed.
  • the problem to be solved by the present invention is to provide a dish washer and a control method for controlling the rotation direction of the nozzle that rotates by the injection force of the washing water without a drive device.
  • the tub is formed a space for receiving a cleaning object;
  • a spraying arm including a main arm accommodated in the tub and spraying the washing water to the washing object while being spaced at a predetermined angle with respect to the main arm to spray the washing water to the washing object;
  • a washing motor for supplying washing water to the spray arm;
  • a current sensing unit sensing a current of the cleaning motor while the injection arm is rotating;
  • a control unit for controlling the washing motor to supply washing water to the injection arm, and detecting a rotational direction of the injection arm in response to a change in current detected by the current sensing unit while the injection arm is rotated. do.
  • the controller controls the rotation direction of the injection arm by setting different rotation ratios for the first direction rotation and the second direction rotation according to the operation mode.
  • the present invention is a tub formed to accommodate the washing object;
  • a spraying arm including a main arm accommodated in the tub and spraying the washing water to the washing object while being spaced at a predetermined angle with respect to the main arm to spray the washing water to the washing object;
  • a sump mounted on a bottom of the tub to store washing water and supplying washing water to the injection arm;
  • a washing motor for supplying the washing water stored in the sump to the injection arm;
  • a current sensing unit sensing a current of the cleaning motor while the injection arm is rotating; The washing motor is controlled so that the washing water is supplied to the spray arm, and the rotation direction determined by the washing water sprayed from one of the main arm and the auxiliary arm is controlled by the current sensing unit while the spray arm rotates.
  • a controller configured to detect a rotational direction of the injection arm in response to the change of the current detected by the injection arm.
  • the tub is formed in the space to accommodate the washing object, the main arm accommodated in the tub and spraying the washing water to the washing object and a predetermined angle spaced apart from the main arm to rotate the spraying washing water to the washing object
  • An injection arm including an auxiliary arm, a cleaning motor for supplying washing water to the injection arm, a current sensing unit for sensing a current of the cleaning motor while the injection arm rotates, and controlling the washing motor to control the washing motor.
  • a control unit configured to detect a direction in which the injection arm rotates at the next rotation by a change in current detected by the current sensing unit while the injection arm rotates.
  • the control unit may increase the rotational speed of the washing motor step by step until a current change is detected.
  • control unit again operates the washing motor at the same rotation speed to determine whether the current changes again.
  • control method of the dishwasher of the present invention before pre-washing, the step of watering the washing water; Supplying the washing water stored in the sump to the injection arm by operating the washing motor; Spraying the washing water while the spraying arm rotates in one direction by the supplied washing water; Sensing the current of the cleaning motor while the injection arm is rotating; Detecting a rotational direction of the injection arm in response to a change in current while the injection arm rotates; Further watering the washing water; And controlling the rotational direction of the injection arm and performing a preliminary cleaning.
  • the present invention the step of determining the rotational speed for detecting the rotational direction; Operating a washing motor at the rotational speed to rotate the injection arm; Sensing current of the cleaning motor while the injection arm is rotating; Determining that the injection arm rotates in the clockwise direction when there is a current change in the next rotation; And determining that the injection arm is to rotate counterclockwise upon the next rotation when there is no current change.
  • Determining the rotational speed step of increasing the rotational speed of the washing motor in a predetermined unit; Washing water supplied to the spray arm by the washing motor, and rotating the spray arm; Sensing current of the cleaning motor while the injection arm is rotating; And determining the rotation speed as the rotation speed for detecting the rotation direction when there is a current change.
  • the present invention can detect the rotational direction of the injection arm by using a change in the current according to the rotational speed.
  • the present invention can detect the rotational direction of the injection arm, it can be controlled to rotate the injection arm in a predetermined rotation direction according to the operation mode.
  • the present invention can easily collect contaminants using the washing water flowing down from the injection arm by controlling the rotational direction of the injection arm.
  • the present invention can improve the cleaning force by controlling the rotation direction of the injection arm to improve the injection force of the fixed injection hole.
  • the injection angle formed in the injection arm is formed at a plurality of angles, when the injection arm is rotated in a specific mode, the cleaning performance can be improved.
  • the present invention can improve the cleaning performance by adjusting the ratio of the rotational direction of the injection arm in accordance with the washing target or the set operation mode.
  • FIG. 1 is a perspective view of a dish washer according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a dish washer according to an embodiment of the present invention.
  • FIG. 3 is a view showing a coupling structure of the sump and the injection arm assembly of FIG.
  • FIG. 4 is an exploded perspective view of the injection arm assembly of FIG. 3.
  • FIG. 5 is a block diagram of a dishwasher according to one embodiment of the present invention.
  • FIG. 6 is a block diagram schematically showing a control configuration for the operation of the injection arm assembly of the present invention.
  • FIG. 7 is a graph showing the current and the rotational speed, according to the rotational direction of the injection arm assembly of FIG.
  • FIG. 8 is a flow chart illustrating a rotation direction control method of the injection arm assembly of the present invention.
  • FIG. 9 is a view showing a change in current and rotational speed for detecting the rotational direction of the injection arm assembly according to the operation of the cleaning motor of the present invention.
  • FIG. 10 is a cross-sectional view of the injection arm assembly of FIG. 3 taken along line II ′.
  • FIG. 11 is a perspective view of the flow path switching unit of FIG. 4, and FIG. 12 is a view of the flow path switching unit of FIG. 11 viewed from below.
  • FIG. 13 is a perspective view of the rotary gear part of FIG. 4.
  • FIG. 14 is a view showing a state in which the upper gear of the flow path switching unit is engaged with the injection arm.
  • 15 is a view showing a state in which the lower gear of the flow path switching unit is engaged with the arm holder.
  • 16 is a view showing the bottom of the injection arm assembly according to the rotation angle of the rotary gear unit.
  • FIG. 17 is a side view of the injection arm assembly of FIG. 16.
  • 19 is a view showing that the washing water is sprayed from the auxiliary arm.
  • FIG. 20 is a cross-sectional view taken along the line II-II ′ of FIG. 18.
  • 21 is a view showing that the washing water is sprayed and reciprocated at the same time in the auxiliary arm.
  • the control unit includes at least one processor.
  • FIG. 1 is a schematic structural diagram of a dishwasher according to an embodiment of the present invention
  • Figure 2 is a block diagram of a dishwasher according to an embodiment of the present invention.
  • the dishwasher 1 includes a case 11 forming an appearance and a washing room 12a provided inside the case 11 to accommodate a washing object.
  • Tub 12 to form a) the door 80 to open and close the washing chamber (12a) is provided on the front of the tub 12, and the sump 90 is disposed below the tub 12 to store the wash water And a plurality of injection arms 13, 14 and 15 for spraying the washing water into the tub 12, and a washing pump 92 for supplying the washing water stored in the sump 90 to the plurality of injection arms 13, 14 and 15. ),
  • a heater 93 for heating the washing water in the washing pump 92, and disposed between the sump 90 and the washing pump 92 so that the washing water flows from the sump 90 to the washing pump 92.
  • Flow switch for measuring the flow rate of the wash valve supplied to the sump 90 from the external water source the switching valve 96 selectively connected to at least one, the water supply valve 22 for supplying the wash water from the external water source to the sump (90) Meter 27 and a drain pump 25 for draining the wash water stored in the sump 90 to the outside.
  • the tub 12 is formed in a hexahedron shape with an open front surface to form a washing chamber 12a therein.
  • a communication hole 12c through which the washing water flows into the sump 90 is formed.
  • the washing chamber 12a is provided with a plurality of racks 16 and 17 in which washing objects are stored.
  • the plurality of racks 16 and 17 include a lower rack 16 disposed below the washing chamber 12a and an upper rack 17 disposed above.
  • the lower rack 16 and the upper rack 17 may be spaced apart from each other in the vertical direction, and may slide out in front of the tub 12. Accordingly, the user can take out the racks 16 and 17 to the front of the tub and store the dishes to be washed in the rack.
  • the plurality of injection arms 13, 14, 15 are arranged in the vertical direction.
  • the plurality of injection arms 13, 14, and 15 are disposed at the lowermost end and disposed above the low injection arm 13 and the lower injection arm 13 for spraying the washing water from the lower side to the upper side toward the lower rack 16. It is disposed on the upper portion of the upper injection arm 14 for spraying the washing water from the lower side toward the upper rack 17 and the upper side of the washing chamber 12a that is the upper side of the upper spraying arm 14 to spray the washing water from the upper side to the lower side.
  • the top injection arm 15 is included.
  • the plurality of injection arms 13, 14, and 15 receive the washing water from the washing pump 92 through the plurality of injection arm connecting passages 18, 19, and 21.
  • the plurality of injection arm connection passages 18, 19, and 21 may include: a low injection arm connection passage 18 connected to the low injection arm 13, an upper injection arm connection passage 19 connected to the upper injection arm 14; It includes a top injection arm connecting passage 21 connected to the top injection arm (15).
  • the sump 90 is disposed below the bottom 12b of the tub 12 to collect the wash water.
  • the sump 90 is connected to the water supply passage 23 through which the washing water supplied from the external water source flows.
  • the water supply passage 23 is provided with a water supply valve 22 that intercepts the washing water supplied from the external water source. When the water supply valve 22 is opened, the washing water supplied from the external water source is introduced into the sump 90 through the water supply passage 23.
  • the water supply passage 23 is provided with a flow meter 27 for measuring the flow rate of the washing water flowing into the sump 90 through the water supply passage 23.
  • the sump 90 is connected to a drain passage 24 that guides the stored washing water to the outside of the dishwasher 1.
  • the drain passage 24 is provided with a drain pump 25 for draining the washing water in the sump 90 through the drain passage 24.
  • the drain pump 25 includes a drain motor (not shown) for generating a rotational force. When the drain pump 25 operates, the wash water stored in the sump 90 flows out of the case 11 through the drain flow channel 24.
  • the filter 26 is mounted in the communication hole 12c to filter dirt from the washing water moving from the tub 12 to the sump 90.
  • the washing pump 92 pumps the washing water stored in the sump 90 to at least one of the plurality of injection arms 13, 14, and 15.
  • the washing pump 92 is connected to the switching valve 96 and the washing water supply passage 94.
  • the washing pump 92 When the washing pump 92 is operated, the washing water stored in the sump 90 is introduced into the washing pump 92 through the collecting passage 91 and then pumped to the switching valve 96 through the washing water supply passage 94.
  • a check valve 175 is provided inside the collecting passage 91 or between the collecting passage 91 and the washing pump 92.
  • the washing pump 92 is installed at one side of the sump 90.
  • the washing pump 92 is connected to the steam hose 95.
  • the steam generated in the washing pump 92 is supplied to the steam nozzle 97 through the steam hose (95).
  • the heater 93 is coupled to the lower side of the washing pump 92 to heat the washing water in the washing pump 92.
  • the heater 93 generates hot water by heating the washing water flowing in the washing pump 92 when the washing pump 92 operates.
  • the heater 93 generates steam by heating the washing water present in the washing pump 92 while maintaining the level of the washing water present in the washing pump 92 above a predetermined level. Therefore, the heater 93 operates the washing pump 92 intermittently and generates steam by heating the washing water present in the washing pump 92 or the heater 93 when the washing pump 92 is stopped.
  • the washing water stored in the washing pump 92 may be heated to generate steam.
  • the hot water generated by the heater 93 is sprayed into the tub 12 through at least one of the plurality of spray arms 13, 14, 15.
  • the steam generated by the heater 93 flows along the steam hose 95 and is discharged into the tub 12 through the steam nozzle 97.
  • the steam nozzle 97 is provided at the lower end of the door 80 to discharge steam to the washing chamber 12a.
  • the steam discharged from the steam nozzle 97 is applied to the washing object housed in the lower rack 16 and / or the lower rack 16.
  • the switching valve 96 selectively supplies the washing water pumped by the washing pump 92 to at least one of the low injection arm 13, the upper injection arm 14, and the top injection arm 15.
  • the switching valve 96 selectively connects at least one of the washing water supply passage 94 and the plurality of injection arm connection passages 18, 19, and 21.
  • the switching valve 96 is arranged in the sump 90.
  • the check valve 175 is disposed between the sump 90 and the washing pump 92 to open in the direction of the washing pump 92 at the sump 90.
  • the check valve 175 is opened to allow the washing water to flow from the sump 90 to the washing pump 92 and is closed to prevent steam from flowing from the washing pump 92 to the sump 90.
  • the check valve 175 is rotated and opened at the lower part about the upper part.
  • the check valve 175 is disposed inside the collecting passage 91 or connected between the collecting passage 91 and the washing pump 92 to open and close the collecting passage 91.
  • the check valve 175 opens when the washing pump 92 operates to flow the washing water, and closes when the washing pump 92 stops and the washing water does not flow.
  • the check valve 175 is opened by the flow pressure of the washing water of the washing pump 92.
  • the check valve 175 may be a solenoid valve opened and closed by an electronic signal.
  • the check valve 175 is formed such that the washing water flows from the washing pump 92 to the sump 90 even in the closed state when the drain pump 25 is operated.
  • FIG. 3 is a view illustrating a coupling structure of the sump and the injection arm assembly of FIG. 1, and FIG. 4 is an exploded perspective view of the injection arm assembly of FIG. 3.
  • the injection arm assembly 10 may be mounted on a sump cover (not shown) to spray the washing water stored in the sump 90 to the washing objects stored in the racks 16 and 17.
  • the injection arm assembly 10 includes a low injection arm 13 for spraying washing water and a fixed gear part 200 and an arm holder 300 mounted to the sump cover to rotatably support the low injection arm 13. It may include.
  • the washing water flows into the sump 90 and flows into the injection arm assembly 10, and the washing water introduced into the injection arm assembly 10 may be sprayed to the washing object by the low injection arm 13.
  • the injection arm assembly 10 may further include a flow path switching unit 400, the rotary gear unit 500 and the link member 600.
  • the injection arm assembly 10 may be used as the low injection arm 13 of the plurality of injection arms.
  • the injection arm assembly 10 may include a main arm 110 and auxiliary arms 140 and 150 rotatably connected to the main arm 110.
  • the secondary arms 140 and 150 may be provided in pairs as shown.
  • the main arm 110 may have a plurality of flow paths through which the washing water provided from the sump 90 flows.
  • the sump 90 may include a sump cover 20 and a sump discharge part 30 provided in the sump cover 20.
  • the sump 90 may receive washing water from the outside through the water supply unit 6, and may discharge the washing water sprayed into the tub 12 through the sump discharge unit 30.
  • the sump 90 may be provided with a feed pump for delivering the washing water stored in the sump 90 to the injection arm assembly 10.
  • the injection arm assembly 10 includes an injection arm 100 for spraying washing water, a fixed gear part 200 and an arm holder 300 mounted on the sump cover 20 to rotatably support the injection arm 100. It may include.
  • the washing water introduced through the water supply unit 6 flows the sump 90 into the injection arm assembly 10, and the washing water introduced into the injection arm assembly 10 is washed by the injection arm 100. Can be sprayed.
  • the injection arm assembly 10 is directly connected to the water supply unit 6 can be injected directly to the object to be washed without passing through the sump (90).
  • Upper injection holes 123 and 124 may be formed at the upper side of the main arm 110 to spray the washing water introduced into the main arm 110.
  • the washing water flowing into the main arm 110 from the sump 90 may be sprayed upwardly through the main injection holes 123 and 124.
  • the washing water sprayed from the upper injection holes 123 and 124 may be directed to the washing target.
  • the main arm 110 may include an arm holder coupling part 180 provided on a bottom surface of the main arm 110 and receiving at least a portion of the arm holder 300.
  • the auxiliary arms 140 and 150 may rotate within a predetermined angle range by the link member 600.
  • Upper auxiliary injection holes 143 and 153 may be formed in the auxiliary arms 140 and 150 to spray the washing water flowing into the main arm 110.
  • the main arm 110 may include a first extension part 111 and a second extension part 112 extending radially about the arm holder coupling part 180.
  • the auxiliary arms 140 and 150 may be rotatably mounted to the first extension 111 and the second extension 112, respectively.
  • a first delivery channel and a second delivery channel through which the washing water flowing from the sump 90 flows may be formed in the first extension 111 and the second extension 112.
  • the washing water flowing through the first delivery channel and the second delivery channel may be flowed to the auxiliary arms 140 and 150, respectively.
  • the auxiliary arms 140 and 150 may include a first auxiliary arm 140 rotatably connected to the first extension part 111 and a second auxiliary arm 150 rotatably connected to the second extension part 112. It may include. Some of the washing water introduced into the main arm 110 may flow into the first sub-channel formed in the first sub-arm 140 and the second sub-channel formed in the second sub-arm 150.
  • a first upper auxiliary injection hole 143 may be formed in the first auxiliary arm 140, and a second upper auxiliary injection hole 153 may be formed in the second auxiliary arm 150. Accordingly, the washing water introduced into the first auxiliary flow path formed in the first auxiliary arm 140 is sprayed through the first upper auxiliary injection hole 143 to the second auxiliary flow path formed in the inner space of the second auxiliary arm 150. The introduced washing water may be sprayed through the second upper auxiliary injection hole 153.
  • Injection arm 100 may be rotated by a separate drive (not shown). However, the injection arm 100 may be rotated by the repulsive force generated when the washing water is sprayed through the upper injection holes 123 and 124 or the upper auxiliary injection holes 143 and 153. That is, the injection arm 100 may rotate by the repulsive force generated by spraying the washing water without a separate driving device such as a motor. The rotation of the spray arm 100 by washing water spray will be described later.
  • the main arm 110 may include a first arm 113 extending in one direction from the center of the main arm 110 and a second arm 114 extending in a direction opposite to the first arm 113. .
  • a first upper injection hole 123 may be formed in the first arm 113, and a second upper injection hole 124 may be formed in the second arm 114.
  • a plurality of first upper injection holes 123 may be formed along the length direction of the first arm 113.
  • the second upper injection holes 124 may be formed in plural along the length direction of the second arm 114.
  • the washing water introduced into the injection arm 100 may flow to the main arm 110 and be injected into the upper injection holes 123 and 124.
  • the washing water introduced into the injection arm 100 may flow to the auxiliary arms 140 and 150 to be injected to the upper auxiliary injection holes 143 and 153.
  • the fixed gear part 200 may be fixed to the sump cover 20 by a gear fixing part (not shown) provided in the sump cover 20.
  • the fixed gear part 200 is disposed to be engaged with the rotary gear part 500.
  • the arm holder 300 may be fixed to the injection arm 100 in combination with the injection arm 100. Accordingly, the arm holder 300 may rotate together with the injection arm 100 and serve as a rotational axis of the injection arm 100.
  • the arm holder 300 may be rotatably fixed to the sump cover 20 while being coupled to the injection arm 100.
  • the wash water supplied from the sump 90 is introduced into the arm holder 300 and then supplied to the injection arm 100.
  • the arm holder 300 may be integrally formed with the main arm 110.
  • the main arm 110 is rotatably fixed to the sump cover 20.
  • the flow path switching unit 400 may be accommodated in the arm holder 300 and may serve to switch the flow path of the washing water supplied from the arm holder 300 to the injection arm 100. The specific function of the flow path switching unit 400 will be described later.
  • the rotary gear unit 500 may be rotatably mounted on the bottom of the injection arm 100.
  • the rotary gear part 500 may rotate in a circular motion along the circumference of the fixed gear part 200 fixed to the sump cover 20 and rotate with the fixed gear part 200. .
  • the link member 600 may be mounted to the injection arm 100.
  • the link member 600 may reciprocally rotate the auxiliary arms 140 and 150 around the longitudinal direction as the rotary gear unit 500 rotates. Specific working principle will be described later.
  • FIG. 5 is a block diagram of a dishwasher according to one embodiment of the present invention.
  • the controller 50 receives the flow rate of the washing water measured by the flow meter 27, the water supply valve 22, the washing motor 99 of the washing pump 92, the heater 93, The drain pump 25 and the switching valve 96 are controlled to wash the object to be cleaned.
  • the controller 50 performs each stroke according to the washing course selected by the user.
  • the controller 50 may sequentially perform the operations of preliminary washing, steam washing, main washing, and rinsing. In addition, the controller 50 may perform heat rinsing according to the setting. Pre-cleaning may be performed a plurality of times.
  • Pre-cleaning is a stroke to remove the dirt attached to the cleaning object by spraying the washing water to the cleaning object. Pre-cleaning can be performed multiple times.
  • the control unit 50 controls the water supply valve 22 to supply the washing water from the external water source into the sump 90 at each time.
  • the controller 50 operates the washing pump 92 to feed the washing water in the sump 90 and controls the switching valve 96 to wash the washing water through at least one of the plurality of injection arms 13, 14, and 15. Spray it.
  • the washing water sprayed through at least one of the plurality of spray arms 13, 14, and 15 drops the dirt attached to the washing object to the bottom 12b of the tub 12 and is collected in the filter 26.
  • the controller 50 operates the drain pump 25 to drain the washing water in the sump 90 to the outside.
  • the pre-cleaning may be performed three times, but may be performed at least once or more various times according to the embodiment.
  • Steam cleaning is a process called spraying heated washing water to the object to be cleaned and steam applied to the object to be cleaned to sterilize the dirt together.
  • the main washing is a stroke for spraying the heated washing water onto the washing target to heat the washing target and to remove dirt attached to the washing target.
  • the controller 50 controls the water supply valve 22 to supply the washing water from the external water source to the sump 90, and then controls the heater 93 to heat the washing water, and operates the washing pump 92.
  • the drain pump 25 After spraying the heated wash water through at least one of the plurality of spray arms 13, 14, 15, the drain pump 25 is operated to drain the wash water in the sump 90 to the outside.
  • the washing detergent may be mixed with the washing water during the main washing.
  • Rinsing is a stroke for removing residual dirt stuck to the washing object.
  • the controller 50 controls the water supply valve 22 to supply the washing water from the external water source to the sump 90, and then operates the washing pump 92 to operate at least one of the plurality of injection arms 13, 14, and 15.
  • the washing water is injected through one, and the drainage pump 25 is operated to drain the washing water in the sump 90 to the outside.
  • the rinse detergent may be mixed with the wash water.
  • Heat rinsing is a stroke for heating the washing object by spraying the heated washing water on the washing object.
  • the controller 50 controls the water supply valve 22 to supply the washing water from the external water source to the sump 90, and then controls the heater 93 to heat the washing water, and the washing pump 92 To spray heated wash water through at least one of the plurality of spray arms 13, 14 and 15, and then operate the drain pump 25 to drain the wash water in the sump 90 to the outside.
  • steam washing may be performed between main washing and rinsing, between rinsing and heating rinsing, or after heating rinsing.
  • FIG. 6 is a block diagram schematically showing a control configuration for the operation of the injection arm assembly of the present invention.
  • the controller 50 controls washing motors at each stage while performing preliminary washing, washing, and rinsing step by step to supply washing water to any one of the plurality of injection arms, or The wash water is supplied to the plurality of injection arms.
  • the control unit controls the washing motor to operate at the set rotational speed, and receives the rotational speed of the actual washing motor detected from the speed sensing unit 52 and the current value detected from the current sensing unit 51 to operate the washing motor 99. To control.
  • the control unit 50 detects the rotational direction of the row injection arm 13 among the plurality of injection arms before starting the washing, that is, before starting the pre-cleaning, and the row injection arm rotates in the designated direction according to the operation step. Do it.
  • the control unit 50 operates the washing motor to detect the rotational direction of the low injection arm 13, and based on the change of the current detected from the current sensing unit while the washing motor rotates, The direction of rotation can be determined.
  • the control unit 50 determines the rotational speed for detecting the rotational direction of the low injection rock based on the change of current while gradually increasing the rotational speed of the washing motor at a constant speed at a low speed, and the rotational speed for detecting the rotational direction.
  • the control unit detects the rotational speed of the low injection rock through the current sensed while the low injection rock is rotating.
  • the controller 50 stops the washing motor and restarts the operation after a predetermined time when a ripple occurs in the sensed current value, that is, when the current value is changed in a short time without maintaining a constant value within a predetermined range.
  • the controller may determine the rotation speed to detect the rotation direction when there is a change in the detected current value while the low injection arm rotates.
  • the controller calculates the difference between the maximum value and the minimum value of the current value detected during the rotation of the low injection arm, and determines that there is a current change when the current difference is greater than or equal to the set current. .
  • the low injection arm the above-described injection arm assembly is rotated in the first direction by the pressure in which the washing water is introduced, the washing water is injected when the washing water is supplied without a separate driving source.
  • the injection arm assembly stops operation, and when the washing water is supplied again, the spray arm assembly rotates in the second direction opposite to the first direction.
  • the low injection rock is rotated by the supply of the washing water, and the rotation direction is alternately rotated in the first direction and the second direction as the operation and stop are repeated.
  • the controller 50 since the controller 50 cannot determine the current rotation direction of the low-spray arm, the controller 50 detects the rotational direction of the low-spray arm before starting the operation, and then performs preliminary washing.
  • the controller 50 increases the rotational speed of the washing motor step by step, stops the washing motor when a ripple occurs in the sensed current value, that is, when a current change occurs, and then restarts the motor at the same rotational speed. It is determined again whether or not ripples occur, and accordingly, the rotational direction of the row injection arm is determined.
  • the low injection rock is rotated in the opposite direction to the previous rotation direction when it is reactivated after the operation stops. When it operates again, it rotates clockwise.
  • the controller 50 stops the operation, and then operates the washing motor again at the first rotational speed. At this time, the low injection rock is rotated in the opposite direction as the initial rotation.
  • the controller checks whether or not current ripple occurs in the current value of the washing motor while the low injection rock is rotated again.
  • the controller rotates the low injection rock counterclockwise during the first rotation. To judge. That is, the controller may determine that the low injection rock will rotate counterclockwise when the next rotation is performed.
  • the controller may determine that the clockwise rotation has occurred during the first rotation. That is, the controller may determine that the low sandblasting arm rotates in the clockwise direction at the next rotation.
  • the low injection arm of the injection arm assembly is different in the direction of the injection port of the main arm and the auxiliary arm, and the injection direction is changed as the auxiliary arm moves left and right while the injection arm assembly is rotating.
  • the controller may determine the rotation direction of the row injection arm using the difference in the current value according to the rotation direction of the row injection arm.
  • the controller determines the rotation direction by using a difference in the amount of the washing water sprayed according to the rotation direction.
  • the washing motor operates at the same rotational speed, the driving force of the washing motor is changed due to the difference in the flow rate of the washing water, and accordingly, the power of the inverter is also changed.
  • the value is variable.
  • the control unit searches the rotation speed to detect the rotation direction by increasing the rotation speed step by step, and confirms the rotation speed, and uses the difference in the current value. To determine the direction of rotation.
  • the controller may control to operate in a specific rotation direction during the low injection rock operation for each operation mode.
  • the low injection arm can be controlled to rotate in a specific direction according to the operation mode by detecting the rotation direction of the low injection arm using the current value, and the rotation time for each rotation direction. By differently setting the injection of the washing water can be made different for each operation mode.
  • the controller 50 since the controller 50 needs to remove foreign substances using a strong jetting force during initial cleaning or cleaning, the controller 50 rotates counterclockwise to the low injection sand, and it is important that the washing water is uniformly sprayed rather than a strong jetting force during rinsing. It can be controlled to rotate clockwise. In addition, the controller may control the operation by adjusting the ratio of the clockwise rotation and the counterclockwise rotation in each step.
  • the low injection sand rotates clockwise at a low speed and uses the fixed nozzle of the main arm to rotate the same speed. If aggressive jetting is required, rotate it counterclockwise.
  • the operation mode according to the rotation direction may be applied differently depending on the product.
  • the controller may store information about the rotation speed in which the rotation direction is sensed in a memory, and detect the rotation direction by operating the injection arm at the corresponding rotation speed during the next operation.
  • the rotation speeds that can sense the rotation direction are different depending on the coupling type of the injection arm assembly, the shape error of the injection arm assembly, the output of the washing motor, the water pressure, and the size of the dishwasher, so that the controller increases the rotation speed step by step. It is possible to search for a rotational speed that can be detected with respect to the rotational direction.
  • the controller may perform washing by varying the ratio of the rotation time for the first direction rotation and the second direction rotation, according to the operation mode. For example, the controller may repeat the second time operation in the second direction after the first time operation in the first direction, and also may rotate only in the first direction or only in the second direction according to the operation. Can be. In addition, the controller may set the rotation speed and the holding time for each rotation direction according to the operation mode.
  • the operation mode may be set to be divided into stages such as decontamination, washing, steam washing, and rinsing.
  • the control unit When detecting the rotational direction, the control unit detects the rotational direction by supplying a smaller amount of water than the washing step so as to easily detect the rotational direction, and then additionally supply the water to start the set operation.
  • the water supply amount can be set to 60 to 80% of the water supply amount of the prewash.
  • the water supply amount may be set to 1.5 to 2.7L. This may be set differently depending on the size of the dishwasher, the amount of water supplied in the washing (or pre-washing) step.
  • Rotational direction detection of the low injection rock uses the ripple of the current value when the suction of the washing motor occurs, but the suction does not occur in any one direction due to the difference in the amount of washing water sprayed according to the rotational direction. Instead, the direction of rotation can be detected by determining the rotation speed at which the suction occurs in the opposite direction.
  • the control unit waters a small amount of washing water. However, if the amount of wash water is too small, suction may occur regardless of the rotation direction. Accordingly, the amount of water supplied at the time of detecting the rotation direction is 60% to 80% or more based on the amount of water supplied at the time of preliminary washing.
  • the control unit detects the rotational direction of the low sandblasting arm, additionally supplies water to the level of preliminary washing, and then performs a set operation.
  • the filter may be blocked by the contaminants, so that the controller restricts the rotational speed of the washing motor from increasing beyond the set speed.
  • the controller varies the speed within the range of the minimum rotation speed to the set speed for starting the washing motor and detects the rotational direction of the low injection arm.
  • the injection arm In the case of detecting the rotational direction, however, when the rotational speed of the washing motor is higher than the amount of the water supplied, the injection arm does not operate normally, and thus the rotational direction determination can be stopped. In particular, during high-speed rotation, pollutants are dropped by the sprayed washing water, so that the current value for detecting the rotation direction is variable, so it is preferable to rotate at low speed so that no dirt falls. Also, at lower speeds below 1400 rpm, the injection arm does not rotate normally. Accordingly, the rotation speed may be set to 1400 rpm to 2500 rpm.
  • the controller detects the rotation direction by controlling within the rotation speed range. At this time, the rotation speed is the rotation speed of the washing motor.
  • the injection arm is not provided with a drive source separately, but rotates with a repulsive force against the injection force of the washing water injected through the injection hole, and thus does not control the rotational speed of the injection arm itself.
  • the controller is operated for a predetermined time to determine the rotation direction by using the current value after stabilization.
  • the controller may determine whether ripple occurs by sampling a current value and using a difference between a maximum value and a minimum value because the current value varies depending on a product.
  • FIG. 7 is a graph showing the current and the rotational speed, according to the rotational direction of the injection arm assembly of FIG.
  • the current sensing unit senses a current and applies the current to the controller during the washing motor operation.
  • the washing water is supplied to the reflective rock, in particular, the low spraying rock, and thus the low spraying rock rotates and sprays the washing water into the dish to be washed through the injection hole.
  • the low injection rock is rotated in either of the first direction or the second direction.
  • the current sensing unit senses the current.
  • the controller 50 may determine the rotation direction of the injection arm based on the current value during the time excluding the initial stabilization time among the currents sensed by the current detector. For example, when the injection arm rotates for about 10 seconds, 3 seconds may be regarded as a stabilization time, and then the rotation direction may be determined using a current value of 7 seconds.
  • the controller may determine the rotation direction of the injection arm, in particular the low injection arm, through the current value detected by restarting the washing motor after stopping the washing motor.
  • control unit determines the rotational speed of the washing motor for detecting the rotational direction, and then operates the washing motor at the corresponding rotational speed, and then sprays it according to the change in the current value (current ripple) of the washing motor detected while the injection arm is rotating.
  • the direction of rotation of the arm can be determined.
  • the current ripple when rotating at the same rotational speed, the current ripple occurs when rotating in the counterclockwise direction, the current ripple may not occur when rotating in the clockwise direction.
  • the rotational speed in which the current ripple occurs when rotating in the clockwise direction if the injection arm rotates in the counterclockwise direction at the same rotational speed will necessarily generate a current ripple.
  • control unit starts and stops the washing motor first, and then starts the second time at the same speed. Based on the current value at the first start and the current value at the second start, the controller judges the current according to the order in which the ripple occurs. can do.
  • ripple occurs at the first start and no ripple occurs at the second start, it may be determined that the motor rotates counterclockwise at the first start. At the next rotation, the injection arm will rotate counterclockwise.
  • the controller determines the rotation direction by calculating a difference between the maximum value and the minimum value of the current value with respect to the current value. Since there is a difference in the current value depending on the product or installation location, it can be determined by calculating the difference between the maximum value and the minimum value for the current value.
  • the controller 50 calculates a difference between the maximum value and the minimum value with respect to the current value in the first section D1 or the second section D2, and determines whether a ripple occurs by determining whether the current difference is greater than or equal to the set current.
  • control unit 50 may restart the washing motor after stopping to determine whether the ripple occurs while the injection arm rotates in the opposite direction, and finally determine the rotation direction of the injection arm.
  • the clockwise rotation is initially determined. If the current is stable, it may be determined that the clockwise rotation is performed during the initial driving.
  • the controller may determine the rotational direction of the injection arm while gradually increasing the rotational speed.
  • FIG. 8 is a flow chart illustrating a rotation direction control method of the injection arm assembly of the present invention.
  • the controller before performing the set operation, the controller detects a rotation direction of the injection arm, in particular, the low injection arm.
  • the control unit starts the water supply by controlling the water supply valve (S410).
  • the amount of water supplied is set less than that of the prewash.
  • water can be supplied at 60-80% of the pre-wash water supply. For example, if 3L of water is pre-washed, it can be supplied at least 1.8 to 2.4L.
  • the washing motor When the washing motor is operated, the washing water is injected through the spraying arm, and the spraying arm rotates in response to the spraying force of the washing water. At this time, the rotation direction is the opposite direction of the injection arm rotation direction before.
  • the injection arm assembly when the injection arm assembly stops after rotating in the first direction, the injection arm assembly rotates in a second direction opposite to the first direction during the next rotation. After the rotation in the second direction, the motor rotates in the first direction during the next rotation.
  • the control unit detects the rotational direction before the pre-cleaning or cleaning to detect the rotational direction of the injection arm assembly in which the rotational direction is changed when stopped.
  • the current detector detects the current of the washing motor for the specified time and applies it to the controller.
  • the control unit calculates a current difference between the maximum value and the minimum value of the current of the washing motor for a specified time (S440).
  • the control unit stops the washing motor (S500), and operates the washing motor again (S510).
  • the injection arm assembly is rotated in a direction opposite to the direction previously rotated.
  • the current sensing unit senses the current for a specified time while the injection arm is rotating.
  • the controller calculates a current difference between the maximum value and the minimum value of the sensed current, and determines whether the current difference is greater than or equal to the set current (S540).
  • the controller determines that the injection arm is rotated clockwise during the first rotation when the current difference is greater than or equal to the set current, that is, when the current difference is greater than or equal to the set current in both the primary rotation and the secondary rotation (S550). Therefore, the injection arm rotates clockwise at the next rotation.
  • the controller may determine that the first rotation rotates counterclockwise, and the second rotation rotates clockwise (S560). Therefore, the injection arm rotates counterclockwise at the next rotation.
  • the control unit increases the speed of the washing motor (S480).
  • the control unit operates the cleaning motor at an increased speed.
  • the current value of the washing motor is sensed and the current difference is calculated and compared (S430 to S480).
  • the control unit increases the rotational speed of the cleaning motor until a current change occurs. If a current change occurs in the process of increasing the rotational speed of the washing motor, the controller may determine the rotational speed as the rotational speed for detecting the rotational direction.
  • the controller controls the water supply valve to additionally supply the washing water, and controls the operation in the preliminary washing or washing process (washing, rinsing, etc.) based on the detected rotation direction (S570). .
  • control unit may set the injection arm to rotate in a specific rotational direction.
  • control unit may control the operation by setting or changing the ratio of the clockwise rotation and the clockwise rotation of the injection arm in a specific step.
  • the rotation direction detection may be further performed, and in some cases, the operation may be controlled regardless of the rotation direction.
  • the motor is stopped once for a short time and stopped, and when the set operation is performed, the second direction may be rotated in the desired direction.
  • the rotation direction of the injection arm assembly since the rotation direction of the injection arm assembly is changed every stop, the rotation direction may be controlled according to an operation step or an operation mode.
  • FIG. 9 is a view showing a change in current and rotational speed for detecting the rotational direction of the injection arm assembly according to the operation of the cleaning motor of the present invention.
  • the dishwasher may have a rotation speed at which a difference in current value occurs in the dishwasher according to the capacity of the product, the performance of the stepper motor, and the number of water supplied.
  • the injection arm assembly having no driving source checks the rotational speed at which the current difference occurs while increasing the rotational speed of the washing motor step by step, and generates a current difference in each rotational direction at the same rotational speed.
  • the direction of rotation can be detected through the
  • the present invention can improve the washing and rinsing performance by adjusting the spraying force of the washing water by differently applying the rotational direction according to the operation mode of the dishwasher as the rotational direction is sensed.
  • FIG. 10 is a cross-sectional view of the injection arm assembly of FIG. 3 taken along line II ′.
  • the injection arm assembly 10 is fastened to the sump cover 20.
  • the arm holder 300 is coupled to the arm holder fastening part 225 provided in the sump cover 20 by the separation prevention part 315 provided in the arm holder 300, thereby providing the sump cover 20. It can be rotatably fixed to).
  • the fastening part 223 provided in the fixed gear part 200 is fastened to the gear fixing part 224 provided in the sump cover 20. Accordingly, the fixed gear part 200 is coupled to the sump cover 20. Unlike the arm holder 300, the fixed gear part 200 is fixed to be not rotatable.
  • the rotary gear unit 500 is inserted into the gear rotating shaft 135 provided in the injection arm 100. Accordingly, the rotary gear unit 500 is coupled to the injection arm 100, it is possible to rotate around the gear axis of rotation (135).
  • the link member 600 may be supported by guide protrusions 136 and 137 provided on the injection arm 100.
  • an eccentric protrusion 530 provided in the rotary gear part 500 may be inserted into the link member 600.
  • the eccentric protrusion 530 may reciprocate the link member 600 within a predetermined range by the rotation of the fixed gear unit 200.
  • the fastening protrusion 182 provided in the injection arm 100 is inserted into the fastening protrusion receiving portion 332 provided in the arm holder 300. Accordingly, the arm holder 300 is coupled to the injection arm 100.
  • the main flow paths 117 and 118 through which the washing water flowing from the arm holder 300 flows may be formed in the injection arm 100.
  • the main flow paths 117 and 118 may include a first main flow path 117 formed inside the first arm 113 and a second main flow path formed inside the second arm 114. 118).
  • the first main flow path 117 and the second main flow path 118 may be partitioned from each other by the partition wall 116.
  • the washing water flowing through the first main flow path 117 may be sprayed to the outside through the first upper injection hole 123, and the washing water flowing through the second main flow path 118 may be the second upper injection hole 124. It may be sprayed to the outside through).
  • the main flow paths 117 and 118 may be referred to as 'wash water flow paths'.
  • the flow path switching unit 400 is accommodated in the arm holder chamber 320 provided in the arm holder 300.
  • the flow path switching unit 400 moves upwards, and the wash water flows into the arm holder chamber 320. If stopped, the water pressure inside the arm holder chamber 320 is lowered and the flow path switching unit 400 may move downward.
  • the wash water accommodated in the arm holder chamber 320 may flow into the main arm 110.
  • the flow path switching unit 400 may be accommodated in the arm holder chamber 320.
  • the washing water introduced into the arm holder chamber 320 may be selectively introduced into the plurality of inlets by the flow path switching unit 400.
  • the injection arm 100 may include a main arm 110, an auxiliary arm 140 and 150, and an auxiliary arm connecting member 160 connecting the main arm 110 and the auxiliary arms 140 and 150.
  • the main arm 110 may include an upper frame 120 and a lower frame 130.
  • the lower frame 130 may have lower injection holes 133 and 134 through which the washing water introduced into the main arm 110 is sprayed.
  • the washing water introduced into the main arm 110 may be injected downward of the main arm 110 through the lower injection holes 133 and 134.
  • the upper injection holes 123 and 124 and the lower injection holes 133 and 134 may be collectively referred to as 'main injection holes'.
  • the washing water introduced into the main arm 110 is simultaneously sprayed through the upper injection holes 123 and 124 and the lower injection holes 133 and 134, thereby acting on the main arm 110 by spraying the washing water.
  • the repulsive force in the vertical direction can be canceled.
  • the injection arm 100 may include guide protrusions 136 and 137 for guiding the movement of the link member 600.
  • the auxiliary arms 140 and 150 may include power transmission units 146 and 156 that receive power from the link member 600. As the link member 600 transmits the power transmitted from the rotary gear unit 500 to the power transmission units 146 and 156, the auxiliary arms 140 and 150 may rotate reciprocally. That is, the reciprocating motion of the link member 600 is converted to the rotational motion of the auxiliary arms 140 and 150.
  • FIG. 11 is a perspective view of the flow path switching unit of FIG. 4, and FIG. 12 is a view of the flow path switching unit of FIG. 11 viewed from below.
  • the flow path switching unit 400 is the switching unit body 410, the upper gear and the 410 provided on the upper surface of the switching unit body 410 It includes a lower gear 430 provided on the lower surface of the.
  • the upper gear may include a plurality of upper gears 421, 422, 423, and 424.
  • the switching unit body 410 is accommodated in the inlet pipe 321 of the arm holder chamber 320, it can reciprocate up and down in the arm holder chamber 320 in accordance with the water pressure inside the arm holder chamber 320. have.
  • the switching unit body 410 may be formed in a disk shape to correspond to the cross-sectional shape of the inlet pipe 321.
  • the switching unit body 410 may be provided with openings 413 and 414 through which the washing water flowing into the arm holder chamber 320 flows.
  • the opening holes 413 and 414 are connected to any one of the plurality of inlets 138a, 138b, 138c, and 138d, respectively. Can communicate.
  • the plurality of upper gears 421, 422, 423, and 424 may be provided as four, and may be disposed at 90 degree intervals with respect to the center C of the switching unit body 410.
  • the plurality of upper gears 421, 422, 423, and 424 may be spaced apart from the center C of the switching unit body 410 and the edge of the switching unit body 410 by a predetermined interval.
  • the opening holes 413 and 414 are formed between two upper gears 421 and 423 facing each other among the plurality of upper gears 421, 422, 423 and 424, respectively, and an edge of the switching unit body 410. Can be.
  • the plurality of upper gears 421, 422, 423, and 424 may include first and third upper gears 421 and 423 disposed adjacent to the opening holes 413 and 414, and first and third upper gears 421 and 423. ) May include second and fourth upper gears 422 and 424 disposed to face each other.
  • each of the second and fourth upper gears 422 and 424 is in close contact with the plurality of inlets 138a, 138b, 138c, and 138d to prevent the washing water from flowing into the plurality of inlets 138a, 138b, 138c, and 138d.
  • Inflow preventing portions 422a and 424a may be formed.
  • the lower gear 430 may be engaged with the lower gear tooth 323 provided in the arm holder chamber 320.
  • the lower gears 430 may be provided in four, and may be disposed at 90 degree intervals with respect to the center C of the switching unit body 410.
  • the lower gear 430 includes vertices 435 formed between two inclined surfaces 433 and 434 and two inclined surfaces 433 and 434, respectively. Each of the inclined surfaces 433 and 434 extends by an angle of 45 degrees on the circumference of the switching unit body 410.
  • the flow path switching unit 400 further includes a protrusion 432 provided on the side portion of the switching unit body 410 to prevent foreign matter from being caught between the flow path switching unit 400 and the inner circumferential surface of the arm holder chamber 320. can do.
  • a plurality of protrusions 432 may be provided.
  • the protrusion 432 may be provided on the side portion of the lower gear 430.
  • the flow path switching unit 400 may include a rotating unit 440 provided at the bottom of the switching unit body 410.
  • the rotating unit 440 serves to rotate the flow path switching unit 400 by the washing water flowing from the bottom of the flow path switching unit 400. Accordingly, the flow path switching unit 400 may selectively open and close the plurality of inlets 138a, 138b, 138c, and 138d by rotating by a predetermined angle unit by hydraulic pressure without a separate driving device.
  • the rotating part 440 may include a shaft 441 and an impeller 443 provided in the shaft 441.
  • FIG. 13 is a perspective view of the rotary gear part of FIG. 4.
  • a rotary gear unit 500 includes a rim portion 510 including a plurality of gears 513 along an outer circumferential surface thereof, and a rotation shaft accommodating portion in which the gear rotation shaft 135 is accommodated. 520 and an eccentric protrusion 530 inserted into the link member 600 to reciprocate the link member 600.
  • a plurality of gears 513 may be referred to as a second gear part 513.
  • the rotary shaft accommodating part 520 may be provided at the rim 510, and the gear rotating shaft 135 may be inserted therein.
  • the rotary shaft accommodating part 520 may extend toward the upper side of the rotary gear part 500 (below the rotary gear part in FIG. 13).
  • the eccentric protrusion 530 may be provided on a bottom surface (upper side of the rotary gear unit in FIG. 12) of the rotation shaft receiving unit 520.
  • the eccentric protrusion 530 may extend from the bottom of the rotary gear part 500 in the direction of the rotation axis S of the rotary gear part 500.
  • the rotating shaft S corresponds to the center of rotation of the rotary gear 500 and may be provided at the center of the rim 510.
  • unlike the illustrated eccentric protrusion 530 may be provided in the rim portion 510.
  • Figure 14 is a view showing a state in which the upper gear of the flow path switching unit is engaged with the injection arm
  • Figure 15 is a view showing a state of the lower gear of the flow path switching unit is engaged with the arm holder.
  • the flow path switching unit 400 moves upward by the water pressure of the washing water flowing through the washing water inlet 313, and a plurality of upper parts provided in the flow path switching unit 400.
  • Gears 421, 422, 423, and 424 may be engaged with the upper gear fitting portion 139 provided on the bottom surface of the injection arm 100. At this time, the washing water introduced into the inflow pipe 321 may flow into the first main flow path 117 through the first opening hole 413.
  • the washing water introduced into the inflow pipe 321 may flow into the second main flow path 117 through the second opening hole 414. That is, when the opening holes 413 and 414 communicate with the first and second inlets 138a and 138b, the washing water introduced into the inlet pipe 321 may be simultaneously introduced into the main flow passages 117 and 118. Can be. At this time, the third and fourth inlets 138c and 138d are closed by the switching unit body 410. Accordingly, the inflow of the wash water through the first and second delivery passages is blocked. At the same time, the inflow of the wash water through the first and second auxiliary flow paths is also blocked.
  • the flow path switching unit 400 is lowered while the force acting on the upper side of the flow path switching unit (400) is removed. Accordingly, the lower gear 430 provided in the flow path switching unit 400 is engaged with the lower gear fitting portion 323 provided in the arm holder 300.
  • the flow path switching unit 400 rotates a predetermined angle in a clockwise direction (or counterclockwise direction). In this case, the flow path switching unit 400 may rotate about 45 degrees. This is because the inclined surface 433 provided on the lower gear 430 occupies an angle of 45 degrees on the circumference of the switching unit body 410.
  • the flow path switching unit 400 rises and the plurality of upper gears 421, 422, 423 and 424 may be engaged with the upper gear fitting 139 again.
  • the opening holes 413 and 414 communicate with the third and fourth inlets 138c and 138d rather than the first and second inlets 138a and 138b. Accordingly, the washing water introduced into the inlet pipe 321 flows into the third and fourth inlets 138c and 138d through the opening holes 413 and 414.
  • the first and second inlets 138a and 138b are closed by the switching unit body 410. Accordingly, the inflow of the wash water through the main flow paths 117 and 118 is blocked.
  • the sump 90 may supply the washing water intermittently when the washing water is supplied to the washing water inlet 313. Specifically, the sump 90 may supply the washing water to the arm holder 300 for a predetermined time, and then stop the supply of the washing water for a predetermined time. That is, the sump 90 alternately supplies and stops the washing water.
  • the main flow paths 117 and 118 and the first and second transfer paths may be alternately opened and closed.
  • the time at which the washing water is supplied to the main flow passages 117 and 118 through the sump and the time at which the washing water is supplied to the first and second delivery passages may be set to be the same.
  • the auxiliary arms 140 and 150 reciprocate and rotate.
  • FIG. 16 is a view illustrating a bottom surface of the injection arm assembly according to the rotation angle of the rotary gear part
  • FIG. 17 is a side view of the injection arm assembly of FIG. 16.
  • FIG. 16 respectively illustrate the injection arm assembly 10 when the rotary gear part 500 is rotated by 0 degrees, 90 degrees, 180 degrees, and 270 degrees.
  • FIG. 17 are the injection arm assemblies of (a), (b), (c) and (d) of FIG. 17, respectively.
  • 10 is a side view.
  • the eccentric protrusion 530 is located at one side of the insertion part 625.
  • the first auxiliary arm 140 is disposed in parallel with the main arm 110.
  • the first auxiliary extension part 640 applies a force to the first power transmission part 146 as the link member 600 moves along the long axis 612a. Accordingly, the first auxiliary arm 140 rotates by a predetermined angle in the clockwise direction. The rotation angle of the first auxiliary arm 140 is about 20 degrees.
  • the link member 600 when the rotary gear part 500 further rotates by 90 degrees in the counterclockwise direction, the link member 600 is moved by the eccentric protrusion 530. It moves along B direction among the major axis 612a directions. At this time, the first auxiliary arm 140 rotates by a predetermined angle in the counterclockwise direction. The rotation angle of the first auxiliary arm 140 is about 20 degrees.
  • the second auxiliary arm 150 may be rotated at the same angle to the link member 600 at the same time as the first auxiliary arm 140. However, when viewed from the side, the second auxiliary arm 150 rotates in the opposite direction to the first auxiliary arm 140. As described above, the link member 600 may move by reciprocating by the distance between the top dead center and the bottom dead center of the eccentric protrusion 530 by the rotation of the rotary gear unit 500.
  • FIG. 18 is a view illustrating the washing water sprayed from the main arm
  • FIG. 19 is a view showing the washing water spraying from the auxiliary arm
  • FIG. 20 is a cross-sectional view taken along the line II-II ′ of FIG. 18.
  • the main arm 110 includes a plurality of upper injection holes.
  • the first arm 113 may include a plurality of first upper injection holes 123a, 123b, 123c, and 123d.
  • the second arm 114 may include a plurality of second upper injection holes 124a, 124b, 124c, and 124d.
  • At least some of the plurality of first upper injection holes 123a, 123b, 123c, and 123d may be biased such that the direction of the washing water sprayed is acute with the main arm 110.
  • the injection arm 100 may rotate by the repulsive force generated by spraying the washing water from some of the deflected injection holes (123a, 123b). That is, the washing water is injected from some of the deflected injection holes 123a and 123b, so that a predetermined torque value may be generated in the injection arm 100.
  • the other injection holes 123c and 123d are not deflected, and the washing water may be sprayed in a vertical direction.
  • At least some of the plurality of second upper injection holes 124a, 124b, 124c, and 124d may be deflected so that the direction of the washing water sprayed is acute with the main arm 110.
  • the injection arm 100 may rotate by the repulsive force generated by the injection of the washing water from some of the injection holes (124a, 124b). That is, the washing water is injected from some of the deflected injection holes 124a and 124b, so that a predetermined torque value may be generated in the injection arm 100.
  • the jetting holes 123a and 123b deflected among the first upper injection holes 123 and the jetting holes 124a and 124b deflected among the second upper injection holes 124 spray the washing water in a tangential direction of the rotational trajectory of the injection arm 100.
  • Some of the plurality of first upper injection holes 124a, 124b, 124c, and 124d are not deflected, and the washing water may be sprayed in a vertical direction.
  • the plurality of upper injection holes 123 and 124 may be deflected at different angles to spray the washing water at various angles.
  • the plurality of first upper auxiliary injection holes 143a, 143b, 143c, and 143d and the plurality of second upper auxiliary injection holes 153a, 153b, 153c, and 153d are provided. The washing water is sprayed through.
  • the deflected jet holes 143a and 143b and the unbiased jet holes 143c and 143d may be formed like the main arm 110.
  • the second auxiliary arm 150 may also have at least some deflected jets 153a and 153b and unbiased jets 153c and 153d.
  • the deflection jets 143a and 143b provided in the first sub-arm 140 are called first deflection jets 143a and 143b, and the deflected jets 153a and 153b provided in the second sub-arm 150 are called first.
  • the two deflection jets 153a and 153b may be called.
  • the unbiased ejection openings 143c and 143d provided in the first auxiliary arm 140 are referred to as first vertical ejection openings 143c and 143d
  • the non-biased ejection openings provided in the second auxiliary arm 150 153c and 153d may be referred to as second vertical injection holes 153c and 153d.
  • Torque generated by spraying the washing water from the first deflection injection holes 143a and 143b may act on the injection arm 100.
  • a torque generated by spraying the washing water from the second deflection jet holes 153a and 153b may act on the injection arm 100.
  • the washing water jetting directions at the deflected jetting ports 123a, 123b, 124a, and 124b of the main arm 110 will be described.
  • the deflected jets are referred to as the first upper jet 123 and the second upper jet 124. Since the washing water is sprayed from the first upper injection hole 123 and the second upper injection hole 124, the same principle will be described with reference to the second upper injection hole 124.
  • a second main flow passage 118 is formed between the upper frame 120 and the lower frame 130 in the second arm 114.
  • the washing water introduced through the arm holder 300 may flow into the second main flow path 118 and then be sprayed to the outside through the second upper injection hole 124.
  • the second upper injection hole 124 may be biased to face the upper left side with reference to the drawings. Accordingly, the direction A1 of the washing water sprayed from the second upper injection hole 124 may also face the upper left side with reference to the drawings.
  • the washing water injection direction A1 at the second upper injection hole 124 is deflected to form an acute angle with the rotation axis V of the injection arm 100 as shown. Accordingly, the injection arm 100 may rotate by the torque generated by the injection of the washing water through the second upper injection port 124.
  • first upper injection hole 123 provided in the first arm 113 may also be deflected like the second upper injection hole 124. Accordingly, the torque generated by the injection of the washing water from the first upper injection port 123 and the second upper injection port 124 acts on the injection arm 100 simultaneously.
  • the rotation direction of the injection arm 100 may be changed according to the torque of the washing water injected from the first upper injection port 123 and the second upper injection port 124.
  • the rotational force of the injection arm 100 may be stronger. .
  • 21 is a view showing that the washing water is sprayed and reciprocated at the same time in the auxiliary arm.
  • the change of the injection direction of the wash water at the time of reciprocating rotation of the 1st auxiliary arm 140 is demonstrated.
  • the first auxiliary arm 140 is not rotated. In the case of FIG. 21 (b), the first auxiliary arm 140 is rotated clockwise as much as possible. In the case of FIG. 21C, the first auxiliary arm 140 rotates in the counterclockwise direction as much as possible.
  • the washing water is simultaneously sprayed from the first upper auxiliary spray hole 143 and the first lower auxiliary spray hole 144.
  • the washing water spraying direction A2 at the first upper auxiliary spraying hole 143 and the washing water spraying direction A3 at the first lower auxiliary spraying hole 144 may face the upper right side with reference to the drawings.
  • the spraying directions A2 and A3 of the washing water sprayed from the first upper auxiliary spray hole 143 and the first lower auxiliary spray hole 144 may form an acute angle with the rotation axis V of the spray arm 100. Accordingly, clockwise torque may be applied to the injection arm 100 by the washing water sprayed from the first upper auxiliary injection hole 143 and the first lower auxiliary injection hole 144.
  • A2 and A3 may be sprayed to the right based on the rotation axis V of the injection arm 100. Therefore, even when the first auxiliary arm 140 is rotated in the clockwise direction, the clockwise torque may be applied to the injection arm 100.
  • the injection of the washing water sprayed from the first upper auxiliary injection hole 143 and the first lower auxiliary injection hole 144 is performed.
  • the directions A2 and A3 may be sprayed to the right with respect to the rotation axis V of the injection arm 100. Therefore, even when the first auxiliary arm 140 rotates counterclockwise, the clockwise torque may be applied to the injection arm 100.
  • the injection direction A2 of the washing water sprayed from the first upper auxiliary injection hole 143 may be substantially parallel to the rotation axis V of the injection arm 100. In this case, the direction of the torque acting on the injection arm 100 may be changed, which is a problem.
  • the rotation angle of the first auxiliary arm 140 should be smaller than the injection angle of the first upper auxiliary injection hole 143.
  • the spray angle of the first upper auxiliary spray port 143 is the washing water spray direction A2 and the spray arm 100 at the first upper auxiliary spray hole 143 when the first auxiliary arm 140 is not rotated. Means the angle formed by the rotation axis (V).
  • the rotation angle of the first auxiliary arm 140 should be smaller than the injection angle of the first lower auxiliary injection hole 144.
  • the injection angle of the first lower auxiliary injection hole 144 means that the washing water injection direction A3 and the injection arm 100 at the first lower auxiliary injection hole 144 are not rotated. Means the angle formed by the rotation axis (V).
  • the second auxiliary arm 150 also rotates at the same angle when the first auxiliary arm 140 rotates, the washing water sprayed from the first vertical injection holes 143c and 143d and the second vertical injection holes 153c and 153d respectively.
  • the direction of the sprayed washing water may be at the same angle. Therefore, even if the first auxiliary arm 140 and the second auxiliary arm 140 rotate, the torque value of the washing water sprayed from the first vertical injection holes 143c and 143d and the second vertical injection holes 153c and 153d are injected. The torque values due to the washing water being canceled out.
  • the washing water and the second vertical injection holes 153c and 153d sprayed from the first vertical injection holes 143c and 143d are rotated at the same time.
  • the torque values may cancel each other. That is, even if the washing water sprayed from the first vertical spraying holes 143c and 143d and the washing water sprayed from the second vertical spraying holes 153c and 153d are not parallel to each other, the torque value acting on the spraying arm 100 is equal to each other. Can be offset.
  • the maximum spray height of the washing water may also be lowered.
  • the injection arm 100 rotates counterclockwise, and when the washing water is injected from the auxiliary injection holes 143 and 153, the injection arm 100 is clockwise. Direction can be rotated.
  • washing pump 151 heater

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  • Washing And Drying Of Tableware (AREA)

Abstract

A dishwasher and a method for controlling same according to the present invention, with respect to a spraying arm which rotates, without a driving device, by a spraying force of washing water, detects, through a change in current due to a difference in the spraying force according to the rotation direction of the spraying arm, a rotation direction of the spraying arm so as to control the spraying arm to rotate in a predetermined rotation direction according to an operation mode, and improve washing performance by using the difference in the spraying force according to the rotation direction.

Description

식기 세척기 및 그 제어방법Dishwasher and Control Method
본 발명은 식기 세척기 및 그 제어방법에 관한 것으로, 보다 상세하게는 세척수가 분사되는 노즐의 회전을 제어하여 세척수를 분사함으로써 식기나 조리도구를 세척하는 식기 세척기 및 그 제어방법에 관한 것이다.The present invention relates to a dishwasher and a control method thereof, and more particularly, to a dishwasher for washing dishes or cooking utensils by controlling the rotation of a nozzle to which the washing water is sprayed and spraying the washing water.
식기 세척기는 분사 암에서 분사되는 고압의 세척수에 의하여, 식기나 조리도구 등(이하, '세척대상')에 묻어 있는 음식물 찌꺼기와 같은 오물이 세척되도록 하는 가전기기이다.The dishwasher is a household appliance that cleans dirt, such as food waste, which is buried in a dish or cooking utensils (hereinafter, 'to be cleaned') by high-pressure washing water sprayed from a spraying arm.
식기 세척기는 일반적으로 세척실을 형성하는 터브와, 터브 바닥에 장착되어 세척수가 저장되는 섬프로 이루어진다. 그리고, 섬프 내부에 장착된 세척펌프의 펌핑 작용에 의하여 세척수가 분사 암으로 이동되고, 분사 암으로 이동된 세척수는 분사 암에 형성된 분사구를 통하여 고압으로 분사된다. 그리고, 고압으로 분사되는 세척수가 세척대상의 표면에 부딪혀서, 세척대상에 묻어 있는 오물이 터브 바닥으로 떨어지게 된다.The dishwasher generally consists of a tub forming a washing chamber and a sump mounted on the bottom of the tub to store the washing water. Then, the washing water is moved to the injection arm by the pumping action of the washing pump mounted inside the sump, and the washing water moved to the injection arm is injected at high pressure through the injection hole formed in the injection arm. Then, the washing water sprayed at a high pressure hit the surface of the cleaning object, the dirt on the cleaning object is dropped to the bottom of the tub.
대한민국 공개특허 10-2015-0016157은 복수의 분사 암을 구비하고, 분사 암으로부터 세척수를 분사하여 수용되는 식기를 세척하는 식기 세척기를 설명하고 있다. 분사 암은 별도의 구동장치 없이 분사 암으로 유입되는 세척수가 분사되는 압력을 이용하여 회전하도록 구성된다. Korean Patent Laid-Open Publication No. 10-2015-0016157 describes a dishwasher having a plurality of spray arms and washing dishes received by spraying the washing water from the spray arms. The injection arm is configured to rotate using a pressure at which the washing water flowing into the injection arm is injected without a separate driving device.
그러나 구동장치 없이 세척수의 분사력에 의해 분사 암이 회전하도록 구성됨에 따라, 분사 암의 회전방향을 확인하기 어려운 문제점이 있다. However, as the injection arm is rotated by the injection force of the washing water without a driving device, there is a problem that it is difficult to check the rotation direction of the injection arm.
특히, 분사 암은 세탁수 분사구가 소정 각으로 기울어짐에 따라 분사 방향벼별로 세탁수가 분사되는 범위가 압력이 상이하므로, 회전 방향에 따라 세척 성능에 차이가 발생할 수 있다. In particular, since the injection arm has a different pressure range in which the washing water is sprayed for each spray direction as the washing water injection port is inclined at a predetermined angle, a difference in washing performance may occur according to the rotation direction.
분사 암은 분사 후 정지되는 때에 회전방향이 변경되도록 구성됨에 따라, 마지막 회전방향을 확인할 수 없으므로, 소정 시점에서의 회전방향을 확인할 수 없게 된다. Since the injection arm is configured to change the rotation direction when it is stopped after the injection, the last rotation direction cannot be confirmed, so that the rotation direction at a predetermined time point cannot be confirmed.
그에 따라 별도의 구동장치 없이 세척수의 분사력을 이용하여 분사 암을 회전동작시키면서 분사 암의 회전방향을 판단하여, 동작모드에 따라 지정된 방향으로 회전되도록 제어할 필요성이 있다. Accordingly, it is necessary to determine the rotational direction of the injection arm while rotating the injection arm by using the injection force of the washing water without a separate driving device, and to control the rotation of the injection arm to be rotated in the designated direction according to the operation mode.
본 발명이 해결하고자 하는 과제는 구동장치 없이 세척수의 분사력으로 회전동작하는 노즐의 회전방향을 제어하는 식기 세척기 및 그 제어방법을 제공하는 것이다.The problem to be solved by the present invention is to provide a dish washer and a control method for controlling the rotation direction of the nozzle that rotates by the injection force of the washing water without a drive device.
본 발명의 식기 세척기는, 세척대상이 수용되는 공간이 형성되는 터브; 상기 터브의 내부에 수용되어 상기 세척대상으로 세척수를 분사하는 메인 암 및 상기 메인 암에 대하여 소정각도 이격되어 상기 세척대상으로 세척수를 회동 분사하는 보조 암을 포함하는 분사 암; 세척수를 상기 분사 암으로 공급하는 세척모터; 상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 전류감지부; 상기 세척모터를 제어하여 세척수가 상기 분사 암으로 공급되도록 하고, 상기 분사 암이 회전하는 동안 상기 전류감지부에 의해 감지되는 전류의 변화에 대응하여 상기 분사 암의 회전방향을 감지하는 제어부;를 포함한다. The dishwasher of the present invention, the tub is formed a space for receiving a cleaning object; A spraying arm including a main arm accommodated in the tub and spraying the washing water to the washing object while being spaced at a predetermined angle with respect to the main arm to spray the washing water to the washing object; A washing motor for supplying washing water to the spray arm; A current sensing unit sensing a current of the cleaning motor while the injection arm is rotating; A control unit for controlling the washing motor to supply washing water to the injection arm, and detecting a rotational direction of the injection arm in response to a change in current detected by the current sensing unit while the injection arm is rotated. do.
상기 제어부는 회전방향이 감지되면, 동작 모드에 따라, 제 1 방향 회전과 제 2 방향 회전에 대한 회전 비율을 상이하게 설정하여, 상기 분사암의 회전방향을 제어하는 것을 특징으로 한다. When the rotation direction is detected, the controller controls the rotation direction of the injection arm by setting different rotation ratios for the first direction rotation and the second direction rotation according to the operation mode.
또한, 본 발명은 세척대상이 수용되는 공간이 형성되는 터브; 상기 터브의 내부에 수용되어 상기 세척대상으로 세척수를 분사하는 메인 암 및 상기 메인 암에 대하여 소정각도 이격되어 상기 세척대상으로 세척수를 회동 분사하는 보조 암을 포함하는 분사 암; 상기 터브의 저면에 장착되어 세척수가 저수되며, 상기 분사 암으로 세척수를 공급하는 섬프; 상기 섬프에 저수된 세척수를 상기 분사 암으로 공급하는 세척모터; 상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 전류감지부; 상기 세척모터를 제어하여 세척수가 상기 분사 암으로 공급되도록 하고, 상기 메인 암 및 상기 보조 암 중 어느 하나로 부터 분사되는 세척수에 의해 결정되는 회전방향을, 상기 분사 암이 회전하는 동안 상기 전류감지부에 의해 감지되는 전류의 변화에 대응하여 상기 분사 암의 회전방향을 감지하는 제어부를 포함한다. In addition, the present invention is a tub formed to accommodate the washing object; A spraying arm including a main arm accommodated in the tub and spraying the washing water to the washing object while being spaced at a predetermined angle with respect to the main arm to spray the washing water to the washing object; A sump mounted on a bottom of the tub to store washing water and supplying washing water to the injection arm; A washing motor for supplying the washing water stored in the sump to the injection arm; A current sensing unit sensing a current of the cleaning motor while the injection arm is rotating; The washing motor is controlled so that the washing water is supplied to the spray arm, and the rotation direction determined by the washing water sprayed from one of the main arm and the auxiliary arm is controlled by the current sensing unit while the spray arm rotates. And a controller configured to detect a rotational direction of the injection arm in response to the change of the current detected by the injection arm.
본 발명은, 세척대상이 수용되는 공간이 형성되는 터브, 상기 터브의 내부에 수용되어 상기 세척대상으로 세척수를 분사하는 메인 암 및 상기 메인 암에 대하여 소정각도 이격되어 상기 세척대상으로 세척수를 회동 분사하는 보조 암을 포함하는 분사 암, 세척수를 상기 분사 암으로 공급하는 세척모터, 상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 전류감지부, 상기 세척모터를 제어하여 세척수가 상기 분사 암으로 공급되도록 하고, 상기 분사 암이 회전하는 동안 상기 전류감지부에 의해 감지되는 전류의 변화를 통해 상기 분사암이 다음 회전 시 회전할 방향을 감지하는 제어부를 포함한다. The present invention, the tub is formed in the space to accommodate the washing object, the main arm accommodated in the tub and spraying the washing water to the washing object and a predetermined angle spaced apart from the main arm to rotate the spraying washing water to the washing object An injection arm including an auxiliary arm, a cleaning motor for supplying washing water to the injection arm, a current sensing unit for sensing a current of the cleaning motor while the injection arm rotates, and controlling the washing motor to control the washing motor. And a control unit configured to detect a direction in which the injection arm rotates at the next rotation by a change in current detected by the current sensing unit while the injection arm rotates.
상기 제어부는 전류변화가 감지되기까지 상기 세척모터의 회전속도를 단계적으로 증가시키는 것을 특징으로 한다. The control unit may increase the rotational speed of the washing motor step by step until a current change is detected.
상기 제어부는 전류변화가 감지되면, 상기 세척모터를 동일한 회전속도로 다시 동작시켜 전류변화 여부를 다시 판단하는 것을 특징으로 한다. When the current change is detected, the control unit again operates the washing motor at the same rotation speed to determine whether the current changes again.
전류변화가 있는 경우, 다음 회전 시 상기 분사암이 시계방향으로 회전할 것으로 판단하고, 전류변화가 없는 경우 다음 회전 시, 상기 분사 암이 반시계방향으로 회전할 것으로 판단하는 것을 특징으로 한다. If there is a current change, it is determined that the injection arm will rotate clockwise at the next rotation, and if there is no current change, it will be determined that the injection arm will rotate counterclockwise at the next rotation.
또한, 본 발명의 식시세척기의 제어방법은, 예비 세척 전, 세척수를 급수하는 단계; 세척모터를 동작시켜 섬프에 저수된 세척수를 분사 암으로 공급하는 단계; 공급되는 세척수에 의해 상기 분사 암이 어느 일방향으로 회전하면서 세척수를 분사하는 단계; 상기 분사 암이 회전하는 동안, 상기 세척모터의 전류를 감지하는 단계; 상기 분사 암이 회전하는 동안의 전류변화에 대응하여, 상기 분사 암의 회전방향을 감지하는 단계; 세척수를 추가 급수하는 단계; 및 상기 분사 암의 회전방향을 제어하며 예비 세척을 수행하는 단계를 포함한다. In addition, the control method of the dishwasher of the present invention, before pre-washing, the step of watering the washing water; Supplying the washing water stored in the sump to the injection arm by operating the washing motor; Spraying the washing water while the spraying arm rotates in one direction by the supplied washing water; Sensing the current of the cleaning motor while the injection arm is rotating; Detecting a rotational direction of the injection arm in response to a change in current while the injection arm rotates; Further watering the washing water; And controlling the rotational direction of the injection arm and performing a preliminary cleaning.
본 발명은, 회전방향 감지를 위한 회전속도를 결정하는 단계; 상기 회전속도로 세척모터를 동작시켜 분사 암을 회전시키는 단계; 상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 단계; 전류변화가 있는 경우 상기 분사 암이 다음 회전 시, 시계방향으로 회전할 것으로 판단하는 단계; 및 전류변화가 없는 경우 상기 분사 암이 다음 회전 시, 반시계방향으로 회전할 것으로 판단하는 단계;를 포함한다. The present invention, the step of determining the rotational speed for detecting the rotational direction; Operating a washing motor at the rotational speed to rotate the injection arm; Sensing current of the cleaning motor while the injection arm is rotating; Determining that the injection arm rotates in the clockwise direction when there is a current change in the next rotation; And determining that the injection arm is to rotate counterclockwise upon the next rotation when there is no current change.
상기 회전속도를 결정하는 단계는, 세척모터의 회전속도를 소정 단위로 단계적으로 증가시키는 단계; 상기 세척모터에 의해 상기 분사암으로 공급되는 세척수가 분사되며, 상기 분사 암이 회전하는 단계; 상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 단계; 및 전류변화가 있는 경우 상기 회전속도를 회전방향을 감지하기 위한 회전속도로 결정하는 단계;를 더 포함한다. Determining the rotational speed, step of increasing the rotational speed of the washing motor in a predetermined unit; Washing water supplied to the spray arm by the washing motor, and rotating the spray arm; Sensing current of the cleaning motor while the injection arm is rotating; And determining the rotation speed as the rotation speed for detecting the rotation direction when there is a current change.
본 발명의 일 실시예에 따른 식기 세척기 및 그 제어방법은, 구동장치 없이 세척수의 분사력으로 회전동작하는 노즐의 회전방향을 감지할 수 있다. In the dishwasher and its control method according to an embodiment of the present invention, it is possible to detect the rotation direction of the nozzle that rotates by the injection force of the washing water without a driving device.
본 발명은 회전속도에 따른 전류의 변화를 이용하여 분사 암의 회전방향을 감지할 수 있다. The present invention can detect the rotational direction of the injection arm by using a change in the current according to the rotational speed.
본 발명은 분사 암의 회전방향을 감지함으로써, 동작모드에 따라 소정 회전 방향으로 분사 암이 회전동작하도록 제어할 수 있다. The present invention can detect the rotational direction of the injection arm, it can be controlled to rotate the injection arm in a predetermined rotation direction according to the operation mode.
본 발명은 분사 암의 회전방향을 제어하여 분사 암으로부터 흘러내리는 세척수를 이용하여 오염물을 용이하게 채집할 수 있다. The present invention can easily collect contaminants using the washing water flowing down from the injection arm by controlling the rotational direction of the injection arm.
본 발명은 분사 암의 회전방향을 제어하여 고정된 분사구의 분사력을 향상시켜 세척력이 향상될 수 있다. The present invention can improve the cleaning force by controlling the rotation direction of the injection arm to improve the injection force of the fixed injection hole.
본 발명은 분사 암에 형성된 분사각이 복수의 각도로 형성됨에 따라 특정 모드로 동작 시, 지정된 방향으로 분사 암이 회전하도록 함으로써, 세척성능이 향상될 수 있다. According to the present invention, as the injection angle formed in the injection arm is formed at a plurality of angles, when the injection arm is rotated in a specific mode, the cleaning performance can be improved.
본 발명은 세척대상 또는 설정된 동작 모드에 따라 분사 암의 회전방향에 대한 비율을 조절하여 세척 성능이 향상될 수 있다. The present invention can improve the cleaning performance by adjusting the ratio of the rotational direction of the injection arm in accordance with the washing target or the set operation mode.
도 1 은 본 발명의 일 실시예에 따른 식기 세척기의 사시도이다.1 is a perspective view of a dish washer according to an embodiment of the present invention.
도 2 는 본 발명의 일 실시예에 따른 식기 세척기에 대한 구성도이다.2 is a block diagram of a dish washer according to an embodiment of the present invention.
도 3 은 도 1의 섬프와 분사 암 어셈블리의 결합구조를 보여주는 도면이다.3 is a view showing a coupling structure of the sump and the injection arm assembly of FIG.
도 4 는 도 3의 분사 암 어셈블리의 분해사시도이다.4 is an exploded perspective view of the injection arm assembly of FIG. 3.
도 5 는 본 발명의 일 실시예에 따른 식기 세척기에 대한 블럭도이다. 5 is a block diagram of a dishwasher according to one embodiment of the present invention.
도 6 은 본 발명의 분사 암 어셈블리 동작에 대한 제어구성이 간략하게 도시된 블럭도이다. 6 is a block diagram schematically showing a control configuration for the operation of the injection arm assembly of the present invention.
도 7 은 도 2의 분사 암 어셈블리의 회전 방향에 따른, 전류 및 회전속도가 도시된 그래프이다. 7 is a graph showing the current and the rotational speed, according to the rotational direction of the injection arm assembly of FIG.
도 8 은 본 발명의 분사 암 어셈블리의 회전방향 제어방법이 도시된 순서도 이다. 8 is a flow chart illustrating a rotation direction control method of the injection arm assembly of the present invention.
도 9 는 본 발명의 세척모터의 동작에 따른 분사 암 어셈블리의 회전방향을 감지하기 위한 전류 및 회전속도의 변화가 도시된 도이다. 9 is a view showing a change in current and rotational speed for detecting the rotational direction of the injection arm assembly according to the operation of the cleaning motor of the present invention.
도 10은 도 3의 분사 암 어셈블리를 Ⅰ-Ⅰ`에 따라 절개한 단면도이다.FIG. 10 is a cross-sectional view of the injection arm assembly of FIG. 3 taken along line II ′. FIG.
도 11 은 도 4의 유로전환부의 사시도이며, 도 12 는 도 11의 유로전환부를 아래에서 본 도면이다.FIG. 11 is a perspective view of the flow path switching unit of FIG. 4, and FIG. 12 is a view of the flow path switching unit of FIG. 11 viewed from below.
도 13 은 도 4의 회전기어부의 사시도이다.FIG. 13 is a perspective view of the rotary gear part of FIG. 4. FIG.
도 14 는 유로전환부의 상부기어가 분사 암에 치합된 모습을 보여주는 도면이다. 14 is a view showing a state in which the upper gear of the flow path switching unit is engaged with the injection arm.
도 15 는 유로전환부의 하부기어가 암 홀더에 치합된 모습을 보여주는 도면이다.15 is a view showing a state in which the lower gear of the flow path switching unit is engaged with the arm holder.
도 16 은 회전기어부의 회전 각도에 따른 분사 암 어셈블리의 저면을 보여주는 도면이다.16 is a view showing the bottom of the injection arm assembly according to the rotation angle of the rotary gear unit.
도 17 는 도 16의 분사 암 어셈블리의 측면도이다.17 is a side view of the injection arm assembly of FIG. 16.
도 18 는 메인 암에서 세척수가 분사되는 모습을 보여주는 도면이다.18 is a view showing the washing water is sprayed from the main arm.
도 19 은 보조 암에서 세척수가 분사되는 모습을 보여주는 도면이다.19 is a view showing that the washing water is sprayed from the auxiliary arm.
도 20 은 도 18의 Ⅱ-Ⅱ`를 따라 절개한 단면도이다.20 is a cross-sectional view taken along the line II-II ′ of FIG. 18.
도 21 은 보조 암에서 세척수가 분사되는 동시에 왕복 회전하는 모습을 보여주는 도면이다.21 is a view showing that the washing water is sprayed and reciprocated at the same time in the auxiliary arm.
본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다. 그러나 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 수 있으며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하고, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다. 명세서 전체에 걸쳐 동일 참조 부호는 동일 구성 요소를 지칭한다. 본 발명은 제어부는 적어도 하나의 프로세서를 포함한다. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms, and only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout. The control unit includes at least one processor.
이하, 본 발명의 실시예들에 의하여 식기 세척기 및 그 제어방법을 설명하기 위한 도면들을 참고하여 본 발명에 대해 설명하도록 한다.Hereinafter, the present invention will be described with reference to the drawings for explaining a dish washing machine and a control method thereof according to embodiments of the present invention.
도 1은 본 발명의 일 실시예에 따른 식기 세척기에 대한 개략적인 구조도이고, 도 2 는 본 발명의 일 실시예에 따른 식기 세척기에 대한 구성도이다.1 is a schematic structural diagram of a dishwasher according to an embodiment of the present invention, Figure 2 is a block diagram of a dishwasher according to an embodiment of the present invention.
도 1 및 도 2를 참조하면, 본 발명의 일 실시예에 따른 식기 세척기(1)는 외관을 형성하는 케이스(11)와, 케이스(11) 내부에 구비되어 세척대상이 수용되는 세척실(12a)을 형성하는 터브(12)와, 터브(12)의 전면에 구비되어 세척실(12a)을 개폐하는 도어(80)와, 터브(12)의 하측에 배치되어 세척수가 저장되는 섬프(90)와, 터브(12) 내로 세척수를 분사하는 복수의 분사 암(13, 14, 15)과, 섬프(90)에 저장된 세척수를 복수의 분사 암(13, 14, 15)에 공급하는 세척펌프(92)와, 세척펌프(92) 내부의 세척수를 가열하는 히터(93)와, 섬프(90)와 세척펌프(92) 사이에 배치되어 섬프(90)로부터 세척펌프(92)로 세척수가 유동되도록 열리는 체크밸브(175)와, 도어(80)에 구비되어 세척펌프(92)에서 생성된 스팀을 터브(12) 내로 배출하는 스팀노즐(97)과, 세척펌프(92)를 복수의 분사 암(13, 14, 15) 중 적어도 하나와 선택적으로 연결하는 전환밸브(96)와, 외부수원으로부터 세척수를 섬프(90)에 공급하는 급수밸브(22)와, 외부수원으로부터 섬프(90)로 공급되는 세척수의 유량을 측정하는 플로우미터(27)와, 섬프(90)에 저장된 세척수를 외부로 배수하는 배수펌프(25)를 포함한다.1 and 2, the dishwasher 1 according to an embodiment of the present invention includes a case 11 forming an appearance and a washing room 12a provided inside the case 11 to accommodate a washing object. Tub 12 to form a), the door 80 to open and close the washing chamber (12a) is provided on the front of the tub 12, and the sump 90 is disposed below the tub 12 to store the wash water And a plurality of injection arms 13, 14 and 15 for spraying the washing water into the tub 12, and a washing pump 92 for supplying the washing water stored in the sump 90 to the plurality of injection arms 13, 14 and 15. ), A heater 93 for heating the washing water in the washing pump 92, and disposed between the sump 90 and the washing pump 92 so that the washing water flows from the sump 90 to the washing pump 92. The check valve 175, the steam nozzle 97 provided in the door 80 to discharge the steam generated by the washing pump 92 into the tub 12, and the washing pump 92 to the plurality of injection arms 13 , 14, 15) Flow switch for measuring the flow rate of the wash valve supplied to the sump 90 from the external water source, the switching valve 96 selectively connected to at least one, the water supply valve 22 for supplying the wash water from the external water source to the sump (90) Meter 27 and a drain pump 25 for draining the wash water stored in the sump 90 to the outside.
터브(12)는 전면이 개방된 육면체 형태로 형성되어 내부에 세척실(12a)을 형성한다. 터브(12)의 바닥(12b)에는 세척수가 섬프(90)로 유입되는 연통홀(12c)이 형성된다. The tub 12 is formed in a hexahedron shape with an open front surface to form a washing chamber 12a therein. In the bottom 12b of the tub 12, a communication hole 12c through which the washing water flows into the sump 90 is formed.
세척실(12a)에는 세척대상이 수납되는 복수의 랙(16, 17)이 구비된다. 복수의 랙(16, 17)은 세척실(12a)의 하부에 배치되는 하부랙(16)과 상부에 배치되는 상부랙(17)을 포함한다. 하부랙(16)과 상부랙(17)은 상하로 이격하여 배치되며, 터브(12)의 전방으로 슬라이딩되어 인출될 수 있다. 따라서, 사용자는 랙(16, 17)을 터브 전방으로 인출시켜 세척대상인 식기를 랙에 수납시킬 수 있다.The washing chamber 12a is provided with a plurality of racks 16 and 17 in which washing objects are stored. The plurality of racks 16 and 17 include a lower rack 16 disposed below the washing chamber 12a and an upper rack 17 disposed above. The lower rack 16 and the upper rack 17 may be spaced apart from each other in the vertical direction, and may slide out in front of the tub 12. Accordingly, the user can take out the racks 16 and 17 to the front of the tub and store the dishes to be washed in the rack.
복수의 분사 암(13, 14, 15)은 상하방향으로 배치된다. 복수의 분사 암(13, 14, 15)은, 최하단에 배치되어 하부랙(16)을 향해 하측에서 상측으로 세척수를 분사하는 로우분사암(13)과, 로우분사암(13)의 상측에 배치되며 상부랙(17)을 향해 하측에서 상측으로 세척수를 분사하는 어퍼분사암(14)과, 어퍼분사암(14)의 상측인 세척실(12a)의 상단에 배치되어 상측에서 하측으로 세척수를 분사하는 탑분사 암(15)을 포함한다.The plurality of injection arms 13, 14, 15 are arranged in the vertical direction. The plurality of injection arms 13, 14, and 15 are disposed at the lowermost end and disposed above the low injection arm 13 and the lower injection arm 13 for spraying the washing water from the lower side to the upper side toward the lower rack 16. It is disposed on the upper portion of the upper injection arm 14 for spraying the washing water from the lower side toward the upper rack 17 and the upper side of the washing chamber 12a that is the upper side of the upper spraying arm 14 to spray the washing water from the upper side to the lower side. The top injection arm 15 is included.
복수의 분사 암(13, 14, 15)은 복수의 분사 암 연결유로(18, 19, 21)를 통해 세척펌프(92)로부터 세척수를 공급받는다. 복수의 분사 암 연결유로(18, 19, 21)는 로우분사암(13)과 연결되는 로우분사암 연결유로(18), 어퍼분사암(14)과 연결되는 어퍼분사암 연결유로(19) 및 탑분사 암(15)과 연결되는 탑분사 암 연결유로(21)를 포함한다.The plurality of injection arms 13, 14, and 15 receive the washing water from the washing pump 92 through the plurality of injection arm connecting passages 18, 19, and 21. The plurality of injection arm connection passages 18, 19, and 21 may include: a low injection arm connection passage 18 connected to the low injection arm 13, an upper injection arm connection passage 19 connected to the upper injection arm 14; It includes a top injection arm connecting passage 21 connected to the top injection arm (15).
섬프(90)는 터브(12)의 바닥(12b)의 하측에 배치되어 세척수를 집수한다. 섬프(90)는 외부수원으로부터 공급된 세척수가 유동하는 급수유로(23)와 연결된다. 급수유로(23)에는 외부수원으로부터 공급되는 세척수를 단속하는 급수밸브(22)가 구비된다. 급수밸브(22)가 개방되면 외부수원으로부터 공급된 세척수는 급수유로(23)를 통하여 섬프(90)로 유입된다. 급수유로(23)에는 급수유로(23)를 통하여 섬프(90)로 유동되는 세척수의 유량을 측정하는 플로우미터(27)가 구비된다.The sump 90 is disposed below the bottom 12b of the tub 12 to collect the wash water. The sump 90 is connected to the water supply passage 23 through which the washing water supplied from the external water source flows. The water supply passage 23 is provided with a water supply valve 22 that intercepts the washing water supplied from the external water source. When the water supply valve 22 is opened, the washing water supplied from the external water source is introduced into the sump 90 through the water supply passage 23. The water supply passage 23 is provided with a flow meter 27 for measuring the flow rate of the washing water flowing into the sump 90 through the water supply passage 23.
섬프(90)는 저장된 세척수를 식기 세척기(1) 외부로 안내하는 배수유로(24)와 연결된다. 배수유로(24)에는 섬프(90) 내의 세척수를 배수유로(24)를 통하여 배수하는 배수펌프(25)가 구비된다. 배수펌프(25)는 회전력을 발생하는 배수모터(미도시)를 포함한다. 배수펌프(25)가 동작하면 섬프(90)에 저장된 세척수는 배수유로(24)를 통하여 케이스(11) 외부로 유동된다.The sump 90 is connected to a drain passage 24 that guides the stored washing water to the outside of the dishwasher 1. The drain passage 24 is provided with a drain pump 25 for draining the washing water in the sump 90 through the drain passage 24. The drain pump 25 includes a drain motor (not shown) for generating a rotational force. When the drain pump 25 operates, the wash water stored in the sump 90 flows out of the case 11 through the drain flow channel 24.
필터(26)는 연통홀(12c)에 장착되어 터브(12)에서 섬프(90)로 이동하는 세척수에서 오물을 거른다.The filter 26 is mounted in the communication hole 12c to filter dirt from the washing water moving from the tub 12 to the sump 90.
세척펌프(92)는 섬프(90)에 저장된 세척수를 복수의 분사 암(13, 14, 15) 중 적어도 하나로 압송한다. 세척펌프(92)는 전환밸브(96)와 세척수 공급유로(94)로 연결된다. 세척펌프(92)가 동작되면 섬프(90)에 저정된 세척수는 집수유로(91)를 통하여 세척펌프(92)로 유입된 후 세척수 공급유로(94)를 통하여 전환밸브(96)로 압송된다. 집수유로(91) 내부 또는 집수유로(91)와 세척펌프(92) 사이에는 체크밸브(175)가 구비된다.The washing pump 92 pumps the washing water stored in the sump 90 to at least one of the plurality of injection arms 13, 14, and 15. The washing pump 92 is connected to the switching valve 96 and the washing water supply passage 94. When the washing pump 92 is operated, the washing water stored in the sump 90 is introduced into the washing pump 92 through the collecting passage 91 and then pumped to the switching valve 96 through the washing water supply passage 94. . A check valve 175 is provided inside the collecting passage 91 or between the collecting passage 91 and the washing pump 92.
세척펌프(92)는 섬프(90)의 일측방에 설치된다. 세척펌프(92)는 스팀호스(95)와 연결된다. 세척펌프(92)에서 생성된 스팀은 스팀호스(95)를 통하여 스팀노즐(97)로 공급된다.The washing pump 92 is installed at one side of the sump 90. The washing pump 92 is connected to the steam hose 95. The steam generated in the washing pump 92 is supplied to the steam nozzle 97 through the steam hose (95).
히터(93)는 세척펌프(92)의 하측에 결합되어 세척펌프(92) 내의 세척수를 가열한다. 히터(93)는 세척펌프(92)가 동작할 때 세척펌프(92) 내를 유동하는 세척수를 가열하여 온수를 생성한다. 히터(93)는 세척펌프(92) 내부에 존재하는 세척수의 수위를 일정수위 이상으로 유지하면서, 세척펌프(92) 내부에 존재하는 세척수를 가열하여 스팀을 생성한다. 따라서, 히터(93)는 세척펌프(92)를 간헐적으로 동작시키며, 세척펌프(92) 내부에 존재하는 세척수를 가열하여 스팀을 생성하거나, 히터(93)는 세척펌프(92)가 정지하였을 때, 세척펌프(92)에 저장된 세척수를 가열하여 스팀을 생성할 수 있다.The heater 93 is coupled to the lower side of the washing pump 92 to heat the washing water in the washing pump 92. The heater 93 generates hot water by heating the washing water flowing in the washing pump 92 when the washing pump 92 operates. The heater 93 generates steam by heating the washing water present in the washing pump 92 while maintaining the level of the washing water present in the washing pump 92 above a predetermined level. Therefore, the heater 93 operates the washing pump 92 intermittently and generates steam by heating the washing water present in the washing pump 92 or the heater 93 when the washing pump 92 is stopped. The washing water stored in the washing pump 92 may be heated to generate steam.
히터(93)에 의하여 생성된 온수는 복수의 분사 암(13, 14, 15) 중 적어도 하나를 통하여 터브(12) 내로 분사된다. 히터(93)에 의하여 생성된 스팀은 스팀호스(95)를 따라 유동하여 스팀노즐(97)을 통하여 터브(12) 내로 토출된다.The hot water generated by the heater 93 is sprayed into the tub 12 through at least one of the plurality of spray arms 13, 14, 15. The steam generated by the heater 93 flows along the steam hose 95 and is discharged into the tub 12 through the steam nozzle 97.
스팀노즐(97)은 도어(80)의 하단에 구비되어 스팀을 세척실(12a)로 토출한다. 스팀노즐(97)에서 배출된 스팀은 하부랙(16) 및/또는 하부랙(16)에 수납된 세척대상에 작용된다.The steam nozzle 97 is provided at the lower end of the door 80 to discharge steam to the washing chamber 12a. The steam discharged from the steam nozzle 97 is applied to the washing object housed in the lower rack 16 and / or the lower rack 16.
전환밸브(96)는 세척펌프(92)에 의해 압송되는 세척수를 로우분사암(13), 어퍼분사암(14) 및 탑분사 암(15) 중 적어도 하나로 선택적으로 공급한다. 전환밸브(96)는 세척수 공급유로(94)와 복수의 분사 암 연결유로(18, 19, 21) 중 적어도 하나를 선택적으로 연결한다. 전환밸브(96)는 섬프(90)에 배치된다.The switching valve 96 selectively supplies the washing water pumped by the washing pump 92 to at least one of the low injection arm 13, the upper injection arm 14, and the top injection arm 15. The switching valve 96 selectively connects at least one of the washing water supply passage 94 and the plurality of injection arm connection passages 18, 19, and 21. The switching valve 96 is arranged in the sump 90.
체크밸브(175)는 섬프(90)와 세척펌프(92) 사이에 배치되어 섬프(90)에서 세척펌프(92) 방향으로 열린다. 체크밸브(175)는 섬프(90)에서 세척펌프(92)로 세척수가 유동되도록 열리고 세척펌프(92)에서 섬프(90)로 스팀이 유동되지 않도록 닫힌다. 체크밸브(175)는 상부를 중심으로 하부가 회동되어 열린다. 체크밸브(175)는 집수유로(91) 내부에 배치되거나 집수유로(91)와 세척펌프(92) 사이에 연결되어 집수유로(91)를 개폐한다.The check valve 175 is disposed between the sump 90 and the washing pump 92 to open in the direction of the washing pump 92 at the sump 90. The check valve 175 is opened to allow the washing water to flow from the sump 90 to the washing pump 92 and is closed to prevent steam from flowing from the washing pump 92 to the sump 90. The check valve 175 is rotated and opened at the lower part about the upper part. The check valve 175 is disposed inside the collecting passage 91 or connected between the collecting passage 91 and the washing pump 92 to open and close the collecting passage 91.
체크밸브(175)는 세척펌프(92)가 동작하여 세척수를 유동할 때 열리고 세척펌프(92)가 정지하여 세척수가 유동하지 않을 때 닫힌다. 체크밸브(175)는 세척펌프(92)의 세척수의 유동압력에 의하여 개방된다. 실시예에 따라 체크밸브(175)는 전자신호에 의하여 개폐되는 솔레노이드 밸브일 수 있다.The check valve 175 opens when the washing pump 92 operates to flow the washing water, and closes when the washing pump 92 stops and the washing water does not flow. The check valve 175 is opened by the flow pressure of the washing water of the washing pump 92. According to an embodiment, the check valve 175 may be a solenoid valve opened and closed by an electronic signal.
체크밸브(175)는 배수펌프(25)의 동작시 닫힘 상태에서도 세척펌프(92)에서 섬프(90)로 세척수가 유동되도록 형성된다.The check valve 175 is formed such that the washing water flows from the washing pump 92 to the sump 90 even in the closed state when the drain pump 25 is operated.
도 3 은 도 1의 섬프와 분사 암 어셈블리의 결합구조를 보여주는 도면이고, 도 4 는 도 3의 분사 암 어셈블리의 분해사시도이다.3 is a view illustrating a coupling structure of the sump and the injection arm assembly of FIG. 1, and FIG. 4 is an exploded perspective view of the injection arm assembly of FIG. 3.
도 3 및 도 4를 참조하면, 분사 암 어셈블리(10)는 섬프커버(미도시)에 장착되어 섬프(90)에 저장된 세척수를 랙(16, 17)에 수납된 세척대상으로 분사할 수 있다. 3 and 4, the injection arm assembly 10 may be mounted on a sump cover (not shown) to spray the washing water stored in the sump 90 to the washing objects stored in the racks 16 and 17.
분사 암 어셈블리(10)는 세척수를 분사하기 위한 로우분사암(13)과, 섬프커버에 장착되어 로우분사암(13)을 회전 가능하게 지지하는 고정기어부(200) 및 암 홀더(300)를 포함할 수 있다. The injection arm assembly 10 includes a low injection arm 13 for spraying washing water and a fixed gear part 200 and an arm holder 300 mounted to the sump cover to rotatably support the low injection arm 13. It may include.
세척수는 섬프(90)를 유동하여 분사 암 어셈블리(10)로 유입되고, 분사 암 어셈블리(10)로 유입된 세척수는 로우분사암(13)에 의해 세척대상으로 분사될 수 있다. The washing water flows into the sump 90 and flows into the injection arm assembly 10, and the washing water introduced into the injection arm assembly 10 may be sprayed to the washing object by the low injection arm 13.
또한, 분사 암 어셈블리(10)는 유로전환부(400)와, 회전기어부(500) 및 링크부재(600)를 더 포함할 수 있다. In addition, the injection arm assembly 10 may further include a flow path switching unit 400, the rotary gear unit 500 and the link member 600.
분사 암 어셈블리(10)는 복수의 분사 암 중, 로우분사암(13)으로 사용될 수 있다. The injection arm assembly 10 may be used as the low injection arm 13 of the plurality of injection arms.
분사 암 어셈블리(10)는 메인 암(110)과, 메인 암(110)에 회전 가능하게 연결되는 보조 암(140, 150)을 포함할 수 있다. 보조 암(140, 150)은 도시된 것과 같이 한 쌍으로 제공될 수 있다. 메인 암(110)에는 섬프(90)로부터 제공된 세척수가 유동하는 다수의 유로가 형성될 수 있다.The injection arm assembly 10 may include a main arm 110 and auxiliary arms 140 and 150 rotatably connected to the main arm 110. The secondary arms 140 and 150 may be provided in pairs as shown. The main arm 110 may have a plurality of flow paths through which the washing water provided from the sump 90 flows.
섬프(90)는 섬프커버(20)와, 섬프커버(20)에 구비되는 섬프 배출부(30)를 포함할 수 있다. 섬프(90)는 급수부(6)를 통해 외부로부터 세척수를 공급받을 수 있으며, 섬프 배출부(30)를 통하여 터브(12) 내부에 분사된 세척수 등을 배출할 수 있다. 또한, 도시되지 않았으나, 섬프(90) 내부에는 섬프(90) 내부에 저장된 세척수를 분사 암 어셈블리(10)로 전달하기 위한 급수펌프가 구비될 수 있다. The sump 90 may include a sump cover 20 and a sump discharge part 30 provided in the sump cover 20. The sump 90 may receive washing water from the outside through the water supply unit 6, and may discharge the washing water sprayed into the tub 12 through the sump discharge unit 30. In addition, although not shown, the sump 90 may be provided with a feed pump for delivering the washing water stored in the sump 90 to the injection arm assembly 10.
분사 암 어셈블리(10)는 세척수를 분사하기 위한 분사 암(100)과, 섬프커버(20)에 장착되어 분사 암(100)을 회전 가능하게 지지하는 고정기어부(200) 및 암 홀더(300)를 포함할 수 있다. The injection arm assembly 10 includes an injection arm 100 for spraying washing water, a fixed gear part 200 and an arm holder 300 mounted on the sump cover 20 to rotatably support the injection arm 100. It may include.
급수부(6)를 통해 유입된 세척수는 섬프(90)를 유동하여 분사 암 어셈블리(10)로 유입되고, 상기 분사 암 어셈블리(10)로 유입된 세척수는 분사 암(100)에 의해 세척대상으로 분사될 수 있다. 한편, 상기 분사 암 어셈블리(10)는 급수부(6)와 직접 연결되어 섬프(90)를 거치지 않고 직접 세척대상에 분사할 수 있다. The washing water introduced through the water supply unit 6 flows the sump 90 into the injection arm assembly 10, and the washing water introduced into the injection arm assembly 10 is washed by the injection arm 100. Can be sprayed. On the other hand, the injection arm assembly 10 is directly connected to the water supply unit 6 can be injected directly to the object to be washed without passing through the sump (90).
메인 암(110)의 상측에는 메임 암(110)으로 유입된 세척수가 분사되는 상부 분사구(123, 124)가 형성될 수 있다. 섬프(90)로부터 메인 암(110)으로 유입되는 세척수는, 상부 분사구(123, 124)를 통해 메인 암(110)의 상방으로 분사될 수 있다. 상부 분사구(123, 124)로부터 분사된 세척수는 세척대상으로 향할 수 있다.Upper injection holes 123 and 124 may be formed at the upper side of the main arm 110 to spray the washing water introduced into the main arm 110. The washing water flowing into the main arm 110 from the sump 90 may be sprayed upwardly through the main injection holes 123 and 124. The washing water sprayed from the upper injection holes 123 and 124 may be directed to the washing target.
메인 암(110)은 메인 암(110)의 저면에 구비되며 암 홀더(300)의 적어도 일부분이 수용되는 암 홀더 결합부(180)를 포함할 수 있다. The main arm 110 may include an arm holder coupling part 180 provided on a bottom surface of the main arm 110 and receiving at least a portion of the arm holder 300.
보조 암(140, 150)은 링크부재(600)에 의해 소정의 각도범위 이내에서 회전할 수 있다. 보조 암(140, 150)에도 메인 암(110)으로 유입되는 세척수를 분사하기 위한 상부 보조 분사구(143, 153)가 형성될 수 있다.The auxiliary arms 140 and 150 may rotate within a predetermined angle range by the link member 600. Upper auxiliary injection holes 143 and 153 may be formed in the auxiliary arms 140 and 150 to spray the washing water flowing into the main arm 110.
메인 암(110)에는 암 홀더 결합부(180)를 중심으로 방사으로 연장되는 제1연장부(111) 및 제2연장부(112)를 포함할 수 있다. 제1연장부(111) 및 제2연장부(112)에는 각각 보조 암(140, 150)이 회전 가능하게 장착될 수 있다.The main arm 110 may include a first extension part 111 and a second extension part 112 extending radially about the arm holder coupling part 180. The auxiliary arms 140 and 150 may be rotatably mounted to the first extension 111 and the second extension 112, respectively.
제1연장부(111) 및 제2연장부(112)의 내부에는 섬프(90)로부터 유입된 세척수가 유동되는 제1전달유로 및 제2전달유로가 형성될 수 있다. 제1전달유로 및 제2전달유로를 유동하는 세척수는 각각 보조 암(140, 150)으로 유동될 수 있다. A first delivery channel and a second delivery channel through which the washing water flowing from the sump 90 flows may be formed in the first extension 111 and the second extension 112. The washing water flowing through the first delivery channel and the second delivery channel may be flowed to the auxiliary arms 140 and 150, respectively.
보조 암(140, 150)은 제1연장부(111)에 회전 가능하게 연결되는 제1보조 암(140)과 제2연장부(112)에 회전 가능하게 연결되는 제2보조 암(150)을 포함할 수 있다. 메인 암(110)으로 유입된 세척수 중 일부는 제1보조 암(140)의 내부에 형성된 제1보조 유로와 제2보조 암(150)의 내부에 형성된 제2보조 유로로 유동될 수 있다.The auxiliary arms 140 and 150 may include a first auxiliary arm 140 rotatably connected to the first extension part 111 and a second auxiliary arm 150 rotatably connected to the second extension part 112. It may include. Some of the washing water introduced into the main arm 110 may flow into the first sub-channel formed in the first sub-arm 140 and the second sub-channel formed in the second sub-arm 150.
제1보조 암(140)에는 제1상부 보조 분사구(143)가 형성되며, 제2보조 암(150)에는 제2상부 보조 분사구(153)가 형성될 수 있다. 따라서, 제1보조 암(140)에 형성된 제1보조 유로로 유입된 세척수는 제1상부 보조 분사구(143)를 통해 분사되며, 제2보조 암(150)의 내부 공간에 형성된 제2보조 유로로 유입된 세척수는 제2상부 보조 분사구(153)를 통해 분사될 수 있다.A first upper auxiliary injection hole 143 may be formed in the first auxiliary arm 140, and a second upper auxiliary injection hole 153 may be formed in the second auxiliary arm 150. Accordingly, the washing water introduced into the first auxiliary flow path formed in the first auxiliary arm 140 is sprayed through the first upper auxiliary injection hole 143 to the second auxiliary flow path formed in the inner space of the second auxiliary arm 150. The introduced washing water may be sprayed through the second upper auxiliary injection hole 153.
분사 암(100)은 별도의 구동장치(미도시)에 의해 회전할 수 있다. 다만, 분사 암(100)은 상부 분사구(123, 124) 또는 상부 보조 분사구(143, 153)을 통한 세척수 분사 시 발생하는 반발력에 의해 회전할 수 있다. 즉, 분사 암(100)은 모터 등 별도의 구동 장치 없이 세척수를 분사함으로써 발생하는 반발력에 의해 회전할 수 있다. 세척수 분사에 의한 분사 암(100)의 회전에 대해서는 후술한다. Injection arm 100 may be rotated by a separate drive (not shown). However, the injection arm 100 may be rotated by the repulsive force generated when the washing water is sprayed through the upper injection holes 123 and 124 or the upper auxiliary injection holes 143 and 153. That is, the injection arm 100 may rotate by the repulsive force generated by spraying the washing water without a separate driving device such as a motor. The rotation of the spray arm 100 by washing water spray will be described later.
메인 암(110)은 메인 암(110)의 중심에서 일 방향으로 연장되는 제1암(113)과, 제1암(113)과 반대 방향으로 연장되는 제2암(114)을 포함할 수 있다. 제1암(113)에는 제1상부 분사구(123)가 형성되며, 제2암(114)에는 제2상부 분사구(124)가 형성될 수 있다.The main arm 110 may include a first arm 113 extending in one direction from the center of the main arm 110 and a second arm 114 extending in a direction opposite to the first arm 113. . A first upper injection hole 123 may be formed in the first arm 113, and a second upper injection hole 124 may be formed in the second arm 114.
제1상부 분사구(123)는 제1암(113)의 길이 방향을 따라 복수 개로 형성될 수 있다. 제2상부 분사구(124)는 제2암(114)의 길이 방향을 따라 복수 개로 형성될 수 있다. A plurality of first upper injection holes 123 may be formed along the length direction of the first arm 113. The second upper injection holes 124 may be formed in plural along the length direction of the second arm 114.
분사 암(100)으로 유입된 세척수는 메인 암(110)으로 유동하여 상부 분사구(123, 124)로 분사될 수 있다. 또한, 분사 암(100)으로 유입된 세척수는 보조 암(140, 150)으로 유동하여 상부 보조 분사구(143, 153)으로 분사될 수 있다.The washing water introduced into the injection arm 100 may flow to the main arm 110 and be injected into the upper injection holes 123 and 124. In addition, the washing water introduced into the injection arm 100 may flow to the auxiliary arms 140 and 150 to be injected to the upper auxiliary injection holes 143 and 153.
고정기어부(200)는 섬프커버(20)에 구비되는 기어 고정부(미도시)에 의하여 섬프커버(20)에 고정될 수 있다. 고정기어부(200)는 회전기어부(500)와 맞물리도록 배치된다. The fixed gear part 200 may be fixed to the sump cover 20 by a gear fixing part (not shown) provided in the sump cover 20. The fixed gear part 200 is disposed to be engaged with the rotary gear part 500.
암 홀더(300)는 분사 암(100)과 결합하여 분사 암(100)에 고정될 수 있다. 이에 따라, 암 홀더(300)는 분사 암(100)과 함께 회전하며, 분사 암(100)의 회전 중심축 역할을 수행할 수 있다.The arm holder 300 may be fixed to the injection arm 100 in combination with the injection arm 100. Accordingly, the arm holder 300 may rotate together with the injection arm 100 and serve as a rotational axis of the injection arm 100.
암 홀더(300)는 분사 암(100)과 결합한 상태에서 섬프커버(20)에 회전 가능하게 고정될 수 있다. 섬프(90)로부터 공급되는 세척수는 암 홀더(300) 내부로 유입된 후 분사 암(100)으로 공급된다.The arm holder 300 may be rotatably fixed to the sump cover 20 while being coupled to the injection arm 100. The wash water supplied from the sump 90 is introduced into the arm holder 300 and then supplied to the injection arm 100.
한편, 암 홀더(300)는 메인 암(110)과 일체로 형성될 수 있다. 이 경우, 메인 암(110)이 섬프커버(20)에 회전 가능하게 고정되는 것을 볼 수 있다.Meanwhile, the arm holder 300 may be integrally formed with the main arm 110. In this case, it can be seen that the main arm 110 is rotatably fixed to the sump cover 20.
유로전환부(400)는 암 홀더(300) 내부에 수용되며, 암 홀더(300)로부터 분사 암(100)으로 공급되는 세척수의 유로를 전환하는 역할을 수행할 수 있다. 유로전환부(400)의 구체적인 기능에 대해서는 후술한다.The flow path switching unit 400 may be accommodated in the arm holder 300 and may serve to switch the flow path of the washing water supplied from the arm holder 300 to the injection arm 100. The specific function of the flow path switching unit 400 will be described later.
회전기어부(500)는 분사 암(100)의 저면에 회전 가능하게 장착될 수 있다. 분사 암(100)이 회전 하는 경우, 회전기어부(500)는 섬프커버(20)에 고정된 고정기어부(200)의 둘레를 따라 원운동 하는 동시에 고정기어부(200)에 맞물려 자전할 수 있다.The rotary gear unit 500 may be rotatably mounted on the bottom of the injection arm 100. When the injection arm 100 rotates, the rotary gear part 500 may rotate in a circular motion along the circumference of the fixed gear part 200 fixed to the sump cover 20 and rotate with the fixed gear part 200. .
링크부재(600)는 분사 암(100)에 장착될 수 있다. 링크부재(600)는 회전기어부(500)가 자전함에 따라 보조 암(140, 150)을 길이 방향을 중심으로 왕복 회전시킬 수 있다. 구체적인 작동 원리에 대해서는 후술한다.The link member 600 may be mounted to the injection arm 100. The link member 600 may reciprocally rotate the auxiliary arms 140 and 150 around the longitudinal direction as the rotary gear unit 500 rotates. Specific working principle will be described later.
도 5 는 본 발명의 일 실시예에 따른 식기 세척기에 대한 블럭도이다. 5 is a block diagram of a dishwasher according to one embodiment of the present invention.
도 5를 참조하면, 제어부(50)는, 플로우미터(27)에서 측정된 세척수의 유량을 전달받고, 급수밸브(22), 세척펌프(92)의 세척모터(99), 히터(93), 배수펌프(25) 및 전환밸브(96)를 제어하여 세척대상에 대한 세척을 수행한다. 제어부(50)는 사용자에 의하여 선택된 세척코스에 따라 각 행정을 수행한다.Referring to FIG. 5, the controller 50 receives the flow rate of the washing water measured by the flow meter 27, the water supply valve 22, the washing motor 99 of the washing pump 92, the heater 93, The drain pump 25 and the switching valve 96 are controlled to wash the object to be cleaned. The controller 50 performs each stroke according to the washing course selected by the user.
본 실시예에서 제어부(50)는 예비세척, 스팀세척, 본세척, 헹굼의 동작을 순차적으로 수행할 수 있다. 또한 제어부(50)는 설정에 따라 가열헹굼을 수행할 수 있다. 예비세척은 복수 회 수행될 수 있다. In this embodiment, the controller 50 may sequentially perform the operations of preliminary washing, steam washing, main washing, and rinsing. In addition, the controller 50 may perform heat rinsing according to the setting. Pre-cleaning may be performed a plurality of times.
예비세척은 세척수를 세척대상에 분사하여 세척대상에 붙은 오물을 제거하는 행정이다. 예비세척은 복수회 수행될 수 있다. Pre-cleaning is a stroke to remove the dirt attached to the cleaning object by spraying the washing water to the cleaning object. Pre-cleaning can be performed multiple times.
예비세척을 복수회 수행하면, 각각에서 제어부(50)는 급수밸브(22)를 제어하여 외부수원으로부터 세척수를 섬프(90) 내로 공급한다. 급수 후, 제어부(50)는 세척펌프(92)를 동작하여 섬프(90) 내의 세척수를 압송하며 전환밸브(96)를 제어하여 복수의 분사 암(13, 14, 15) 중 적어도 하나를 통하여 세척수를 분사한다. 복수의 분사 암(13, 14, 15) 중 적어도 하나를 통하여 분사된 세척수는 세척대상에 붙은 오물을 터브(12)의 바닥(12b)으로 떨어뜨려 필터(26)에 수집시킨다. 세척수 분사 후, 제어부(50)는 배수펌프(25)를 동작하여 섬프(90) 내의 세척수를 외부로 배수한다.When pre-washing is performed a plurality of times, the control unit 50 controls the water supply valve 22 to supply the washing water from the external water source into the sump 90 at each time. After the water supply, the controller 50 operates the washing pump 92 to feed the washing water in the sump 90 and controls the switching valve 96 to wash the washing water through at least one of the plurality of injection arms 13, 14, and 15. Spray it. The washing water sprayed through at least one of the plurality of spray arms 13, 14, and 15 drops the dirt attached to the washing object to the bottom 12b of the tub 12 and is collected in the filter 26. After the washing water is sprayed, the controller 50 operates the drain pump 25 to drain the washing water in the sump 90 to the outside.
예비세척은 3회가 수행될 수 있으나, 실시예에 따라 적어도 1회 이상 다양한 횟수로 수행될 수 있다.The pre-cleaning may be performed three times, but may be performed at least once or more various times according to the embodiment.
스팀세척은 가열된 세척수를 세척대상에 분사하고 스팀을 세척대상에 작용하여 살균과 함께 세척대상에 붙은 오물을 불리는 행정이다. Steam cleaning is a process called spraying heated washing water to the object to be cleaned and steam applied to the object to be cleaned to sterilize the dirt together.
본세척은, 가열된 세척수를 세척대상에 분사하여 세척대상을 가열하며 세척대상에 붙은 오물을 제거하는 행정이다. 본세척에서 제어부(50)는 급수밸브(22)를 제어하여 외부수원으로부터 세척수를 섬프(90)에 공급한 후, 히터(93)를 제어하여 세척수를 가열하고, 세척펌프(92)를 동작하여 복수의 분사 암(13, 14, 15) 중 적어도 하나를 통하여 가열된 세척수를 분사한 후, 배수펌프(25)를 동작하여 섬프(90) 내의 세척수를 외부로 배수한다. 본세척시 세척세제가 세척수와 혼합될 수 있다.The main washing is a stroke for spraying the heated washing water onto the washing target to heat the washing target and to remove dirt attached to the washing target. In this washing, the controller 50 controls the water supply valve 22 to supply the washing water from the external water source to the sump 90, and then controls the heater 93 to heat the washing water, and operates the washing pump 92. After spraying the heated wash water through at least one of the plurality of spray arms 13, 14, 15, the drain pump 25 is operated to drain the wash water in the sump 90 to the outside. The washing detergent may be mixed with the washing water during the main washing.
헹굼은, 세척대상에 붙은 잔여 오물을 제거하는 행정이다. 헹굼에서 제어부(50)는 급수밸브(22)를 제어하여 외부수원으로부터 세척수를 섬프(90)에 공급한 후, 세척펌프(92)를 동작하여 복수의 분사 암(13, 14, 15) 중 적어도 하나를 통하여 세척수를 분사하고, 배수펌프(25)를 동작하여 섬프(90) 내의 세척수를 외부로 배수한다. 헹굼시 헹굼세제가 세척수와 혼합될 수 있다.Rinsing is a stroke for removing residual dirt stuck to the washing object. In rinsing, the controller 50 controls the water supply valve 22 to supply the washing water from the external water source to the sump 90, and then operates the washing pump 92 to operate at least one of the plurality of injection arms 13, 14, and 15. The washing water is injected through one, and the drainage pump 25 is operated to drain the washing water in the sump 90 to the outside. When rinsing, the rinse detergent may be mixed with the wash water.
가열헹굼은 가열된 세척수를 세척대상에 분사하여 세척대상을 가열하는 행정이다. 가열헹굼(P370)에서 제어부(50)는 급수밸브(22)를 제어하여 외부수원으로부터 세척수를 섬프(90)에 공급한 후, 히터(93)를 제어하여 세척수를 가열하고, 세척펌프(92)를 동작하여 복수의 분사 암(13, 14, 15) 중 적어도 하나를 통하여 가열된 세척수를 분사한 후, 배수펌프(25)를 동작하여 섬프(90) 내의 세척수를 외부로 배수한다.Heat rinsing is a stroke for heating the washing object by spraying the heated washing water on the washing object. In the heating rinse (P370), the controller 50 controls the water supply valve 22 to supply the washing water from the external water source to the sump 90, and then controls the heater 93 to heat the washing water, and the washing pump 92 To spray heated wash water through at least one of the plurality of spray arms 13, 14 and 15, and then operate the drain pump 25 to drain the wash water in the sump 90 to the outside.
실시예에 따라 스팀세척은 본세척과 헹굼 사이, 헹굼과 가열헹굼 사이, 또는 가열헹굼 이후에 수행될 수 있다.According to an embodiment, steam washing may be performed between main washing and rinsing, between rinsing and heating rinsing, or after heating rinsing.
도 6 은 본 발명의 분사 암 어셈블리 동작에 대한 제어구성이 간략하게 도시된 블럭도이다. 6 is a block diagram schematically showing a control configuration for the operation of the injection arm assembly of the present invention.
도 6에 도시된 바와 같이, 제어부(50)는 단계적으로 예비세척, 세척, 헹굼 등의 동작을 단계적으로 수행하면서, 각 단계별로 세척모터를 제어하여 복수의 분사 암 중 어느 하나로 세척수를 공급하거나 또는 복수의 분사 암으로 세척수가 공급되도록 한다. As shown in FIG. 6, the controller 50 controls washing motors at each stage while performing preliminary washing, washing, and rinsing step by step to supply washing water to any one of the plurality of injection arms, or The wash water is supplied to the plurality of injection arms.
제어부는 세척모터가 설정된 회전속도로 동작하도록 제어하고, 속도감지부(52)로부터 감지되는 실제 세척모터의 회전속도와 전류감지부(51)로부터 감지되는 전류값을 입력받아 세척모터(99)의 동작을 제어한다. The control unit controls the washing motor to operate at the set rotational speed, and receives the rotational speed of the actual washing motor detected from the speed sensing unit 52 and the current value detected from the current sensing unit 51 to operate the washing motor 99. To control.
제어부(50)는 세척을 시작하기 전, 즉 예비세척을 시작하기 전, 복수의 분사 암 중, 로우분사암(13)의 회전방향을 감지하여, 동작 단계에 따라 지정된 방향으로 로우분사암이 회전하도록 한다. The control unit 50 detects the rotational direction of the row injection arm 13 among the plurality of injection arms before starting the washing, that is, before starting the pre-cleaning, and the row injection arm rotates in the designated direction according to the operation step. Do it.
제어부(50)는 로우분사암(13)의 회전방향을 감지하기 위해, 세척모터를 동작시키고, 세척모터가 회전하는 동안 전류감지부로부터 감지되는 전류의 변화를 바탕으로 로우분사암(13)의 회전방향을 판단할 수 있다. The control unit 50 operates the washing motor to detect the rotational direction of the low injection arm 13, and based on the change of the current detected from the current sensing unit while the washing motor rotates, The direction of rotation can be determined.
제어부(50)는 세척모터의 회전속도를 저속에서 일정 속도씩 단계적으로 증가시키면서 전류의 변화를 바탕으로 로우분사암의 회전방향을 감지하기 위한 회전속도를 결정하고, 회전방향을 감지하기 위한 회전속도가 결정되면 해당 회전속도로 세척모터를 동작시켜, 로우분사암으로 세척수를 공급함으로써, 로우분사암이 회전하도록 한다. 제어부는 로우분사암이 회전하는 동안 감지되는 전류를 통해 로우분사암의 회전속도를 감지한다. The control unit 50 determines the rotational speed for detecting the rotational direction of the low injection rock based on the change of current while gradually increasing the rotational speed of the washing motor at a constant speed at a low speed, and the rotational speed for detecting the rotational direction. When is determined to operate the washing motor at the rotational speed, by supplying the washing water to the low injection sand, the low injection sand to rotate. The control unit detects the rotational speed of the low injection rock through the current sensed while the low injection rock is rotating.
제어부(50)는 감지되는 전류값에 리플이 발생하는 경우, 즉 소정 범위 내에서 일정한 값을 유지하지 않고 단시간에 전류값이 변경되는 경우, 세척모터를 정지하고, 소정시간 후 재 동작시킨다. 제어부는 로우분사암이 회전하는 동안, 감지되는 전류값에 변화가 있는 경우 회전방향을 감지하기 위한 회전속도로 결정할 수 있다. The controller 50 stops the washing motor and restarts the operation after a predetermined time when a ripple occurs in the sensed current value, that is, when the current value is changed in a short time without maintaining a constant value within a predetermined range. The controller may determine the rotation speed to detect the rotation direction when there is a change in the detected current value while the low injection arm rotates.
제어부는 로우분사암이 회전하는 동안 감지되는 전류값의 최대값과 최소값의 차이를 연산하여, 그 전류차가 설정전류 이상이면 전류변화가 있는 것으로 판단하고, 설정전류 미만이면 전류변화가 없는 것으로 판단한다.  The controller calculates the difference between the maximum value and the minimum value of the current value detected during the rotation of the low injection arm, and determines that there is a current change when the current difference is greater than or equal to the set current. .
로우분사암은, 앞서 설명한 분사 암 어셈블리는 별도의 구동원 없이, 세척수가 공급되면 세척수가 유입되는 압력, 세척수가 분사되는 힘에 의해 제 1 방향으로 회전한다. 제 1 방향으로 회전하는 중에 세척모터가 정지하여 세척수가 공급되지 않는 경우, 분사 암 어셈블리는 동작을 정지하고, 다시 세척수가 공급되면 제 1 방향과 반대방향인 제 2 방향으로 회전한다. The low injection arm, the above-described injection arm assembly is rotated in the first direction by the pressure in which the washing water is introduced, the washing water is injected when the washing water is supplied without a separate driving source. When the washing motor is stopped and the washing water is not supplied while rotating in the first direction, the injection arm assembly stops operation, and when the washing water is supplied again, the spray arm assembly rotates in the second direction opposite to the first direction.
제 2 방향 회전 중에 정지하면, 다음 동작시에는 제 1 반향으로 회전한다. If it stops during the second direction of rotation, it rotates in the first direction during the next operation.
즉 로우분사암은, 세척수의 공급에의해 회전동작하되, 동작 및 정지를 반복함에 따라 그 회전방향이 제 1 방향과 제 2 방향으로 교번하여 회전하게 된다. That is, the low injection rock is rotated by the supply of the washing water, and the rotation direction is alternately rotated in the first direction and the second direction as the operation and stop are repeated.
그에 따라 제어부(50)는 현재 로우분사암의 회전방향을 확인할 수 없으므로, 동작을 시작하기 전, 로우분사암의 회전방향을 감지한 후, 예비세척이 수행되도록 한다. Accordingly, since the controller 50 cannot determine the current rotation direction of the low-spray arm, the controller 50 detects the rotational direction of the low-spray arm before starting the operation, and then performs preliminary washing.
제어부(50)는 세척모터의 회전속도를 단계적으로 증가시키고, 감지되는 전류값에 리플이 발생하는 경우, 즉 전류변화가 발생하는 경우 세척모터를 정지한 후, 동일한 회전속도로 재동작시켜 전류값에 리플이 발생하는지 여부를 다시 판단하여, 그에 따라 로우분사암의 회전방향을 판단한다. The controller 50 increases the rotational speed of the washing motor step by step, stops the washing motor when a ripple occurs in the sensed current value, that is, when a current change occurs, and then restarts the motor at the same rotational speed. It is determined again whether or not ripples occur, and accordingly, the rotational direction of the row injection arm is determined.
앞서 설명한 바와 같이 로우분사암은 동작 정지 후 재 동작 시, 이전 회전방향과는 반대방향으로 회전하게 되므로, 시계방향 회전중에 정지하면 다음에는 반시계방향으로 회전하고, 반시계방향으로 회전 중에 정지후 재 동작하면 시계방향으로 회전한다. As described above, the low injection rock is rotated in the opposite direction to the previous rotation direction when it is reactivated after the operation stops. When it operates again, it rotates clockwise.
제어부(50)는 제 1 회전속도에서 어느 한 반향으로 로우분사암이 회전하는 중에 전류리플이 발생하면, 동작 정지 후, 제 1 회전속도로 세척모터를 다시 동작시킨다. 이때 로우분사암은 초기 회전시와는 반대방향으로 회전하게 된다. If a current ripple occurs while the low injection arm rotates in one direction at the first rotational speed, the controller 50 stops the operation, and then operates the washing motor again at the first rotational speed. At this time, the low injection rock is rotated in the opposite direction as the initial rotation.
제어부는 로우분사암이 재회전하는 동안 세척모터의 전류값에 전류리플이 발생하는지 여부를 확인한다. The controller checks whether or not current ripple occurs in the current value of the washing motor while the low injection rock is rotated again.
제어부는 제 1 회전속도로 세척모터가 동작시키는 경우, 로우분사암의 회전방향이 변경됨에 따라 두 방향에서 모두 전류리플이 발생하면 로우분사암이 1차 회전시 시, 반시계방향으로 회전한 것으로 판단한다. 즉 제어부는 로우분사암이 다음 회전 시, 반시계방향으로 회전할 것으로 판단할 수 있다. When the washing motor is operated at the first rotational speed, when the current ripple occurs in both directions as the rotation direction of the low injection rock is changed, the controller rotates the low injection rock counterclockwise during the first rotation. To judge. That is, the controller may determine that the low injection rock will rotate counterclockwise when the next rotation is performed.
또한, 제어부는, 1차 회전 시 전류리플이 발생하고 2차 회전 시 전류리플이 발생하지 않는 경우, 1차 회전 시 시계방향으로 회전한 것으로 판단할 수 있다. 즉, 제어부는 로우분사암이 다음 회전 시, 시계방향으로 회전할 것으로 판단할 수 있다. In addition, when the current ripple occurs during the first rotation and the current ripple does not occur during the second rotation, the controller may determine that the clockwise rotation has occurred during the first rotation. That is, the controller may determine that the low sandblasting arm rotates in the clockwise direction at the next rotation.
분사 암 어셈블리의 로우분사암은, 메인 암과 보조 암의 분사구 방향이 상이하고, 보조 암은 분사 암 어셈블리가 회전하는 중에 좌우로 동작함에 따라 분사방향이 가변된다. The low injection arm of the injection arm assembly is different in the direction of the injection port of the main arm and the auxiliary arm, and the injection direction is changed as the auxiliary arm moves left and right while the injection arm assembly is rotating.
따라서, 분사구 방향에 의해 시계방향으로 회전하는 경우와 반시계방향으로 회전하는 경우 분사되는 정도에 차이가 발생하고, 그에 따라 감지되는 전류 또한 차이가 발생한다. Therefore, a difference occurs in the degree of injection when the clockwise rotation and the counterclockwise rotation according to the direction of the injection port, the difference is also generated accordingly.
제어부는 로우분사암의 회전방향에 따른 전류값의 차이를 이용하여 로우분사암의 회전방향을 판단할 수 있다. The controller may determine the rotation direction of the row injection arm using the difference in the current value according to the rotation direction of the row injection arm.
이때, 로우분사 암의 메인 암과 보조 암에 형성된 분사구의 방향이 상이하고, 회전방향에 따라 분사되는 세척수의 양에 차이가 발생하는 것을 이용하여 제어부는 회전방향을 판단한다. At this time, the direction of the injection port formed in the main arm and the auxiliary arm of the low injection arm is different, the controller determines the rotation direction by using a difference in the amount of the washing water sprayed according to the rotation direction.
즉, 세척모터가 동일한 회전속도로 동작하더라도 세척수의 유량 차이로 인하여 세척모터의 구동력에 변화가 발생하고, 그에 따라 인버터의 파워 또한 변경되며, 인터버의 파워 변화로 토크가 감소하고, 결과적으로 전류값이 가변된다. That is, even though the washing motor operates at the same rotational speed, the driving force of the washing motor is changed due to the difference in the flow rate of the washing water, and accordingly, the power of the inverter is also changed. The value is variable.
그에 따라 회전방향에 따라 전류값이 상이하게 나타나므로, 제어부는 회전속도를 단계적으로 증가시켜 회전방향을 감지할 수 있는 회전속도를 1차로 탐색하고, 회전속도를 확인하면, 전류값의 차이를 이용하여 회전방향을 판단할 수 있다. Accordingly, since the current value appears differently according to the rotation direction, the control unit searches the rotation speed to detect the rotation direction by increasing the rotation speed step by step, and confirms the rotation speed, and uses the difference in the current value. To determine the direction of rotation.
제어부는 회전방향이 감지되면, 각 동작 모드 별로, 로우분사암 동작 시, 특정 회전방향으로 동작하도록 제어할 수 있다. When the rotation direction is sensed, the controller may control to operate in a specific rotation direction during the low injection rock operation for each operation mode.
로우분사암의 회전을 위한 구동원이 구비되지 않더라도, 전류값을 이용한 로우분사암의 회전방향을 감지함에 따라 동작모드 별로 로우분사암이 특정 방향으로 회전하도록 제어할 수 있고, 또한 회전방향 별로 회전시간을 상이하게 설정하여 동작 모드 별로 세척수의 분사가 상이하게 이루어지도록 할 수 있다. Even if a driving source for the rotation of the low injection arm is not provided, the low injection arm can be controlled to rotate in a specific direction according to the operation mode by detecting the rotation direction of the low injection arm using the current value, and the rotation time for each rotation direction. By differently setting the injection of the washing water can be made different for each operation mode.
제어부(50)는 예를 들어 초기 세정 또는 세정 시, 강한 분사력을 이용한 이물제거가 필요하므로 로우분사암에 반시계방향으로 회전하도록 하고, 헹굼 중에는 강한 분사력보다는 균일하게 세척수가 분사되는 것이 중요하므로, 시계방향으로 회전하는 하도록 제어할 수 있다. 또한, 제어부는 각 단계에서 시계방향 회전과 반시계방향 회전의 비율을 조절하여 그 동작을 제어할 수 있다. For example, since the controller 50 needs to remove foreign substances using a strong jetting force during initial cleaning or cleaning, the controller 50 rotates counterclockwise to the low injection sand, and it is important that the washing water is uniformly sprayed rather than a strong jetting force during rinsing. It can be controlled to rotate clockwise. In addition, the controller may control the operation by adjusting the ratio of the clockwise rotation and the counterclockwise rotation in each step.
또한, 로우분사암에서 세척수가 흘러내리는 경우에는 오염물의 채집이 용이하므로, 오염물 채집이 중요한 동작에서는 로우분사암이 시계방향으로 저속으로 회전동작하도록 하고, 메인 암의 고정노즐을 이용하여 동일 회전속도에서도 강략한 분사가 필요한 경우에는 반시계방향으로 회전하도록 한다. In addition, when the wash water flows down from the low injection sand, it is easy to collect contaminants. Therefore, when the pollutant collection is important, the low injection sand rotates clockwise at a low speed and uses the fixed nozzle of the main arm to rotate the same speed. If aggressive jetting is required, rotate it counterclockwise.
이때, 회전방향에 따른 동작 모드는 제품에 따라 상이하게 적용될 수 있다. In this case, the operation mode according to the rotation direction may be applied differently depending on the product.
제어부는 회전방향을 감지한 회전속도에 대한 정보를 메모리에 저장하고, 다음 동작 시, 해당 회전속도로 분사 암을 동작시켜 회전방향을 감지할 수 있다. The controller may store information about the rotation speed in which the rotation direction is sensed in a memory, and detect the rotation direction by operating the injection arm at the corresponding rotation speed during the next operation.
분사 암 어셈블리의 결합 형태, 분사 암 어셈블리의 형상 오차, 세척모터의 출력, 수압, 식기 세척기의 크기 등에 따라 각각 회전방향 감지가 가능한 회전속도가 상이하게 나타나므로, 제어부는 회전속도를 단계적으로 증가시키면서 회전방향에 대하여 감지가 가능한 회전속도를 탐색할 수 있다. The rotation speeds that can sense the rotation direction are different depending on the coupling type of the injection arm assembly, the shape error of the injection arm assembly, the output of the washing motor, the water pressure, and the size of the dishwasher, so that the controller increases the rotation speed step by step. It is possible to search for a rotational speed that can be detected with respect to the rotational direction.
또한, 제어부는 동작 모드에 따라, 제 1 방향 회전과 제 2 방향 회전에 대한 회전 시간의 비율을 가변하여 세척을 수행할 수 있다. 예를 들어, 제어부는 제 1 방향으로 제 1 시간 동작 후, 제 2 방향으로 제 2 시간 동작하는 것을 반복할 수 있고, 또한, 동작에 따라 제 1 방향으로만 회전하거나 제 2 방향으로만 회전할 수 있다. 또한, 제어부는 동작모드에 따라 각 회전방향에 대한 회전속도 및 유지시간을 설정할 수 있다. In addition, the controller may perform washing by varying the ratio of the rotation time for the first direction rotation and the second direction rotation, according to the operation mode. For example, the controller may repeat the second time operation in the second direction after the first time operation in the first direction, and also may rotate only in the first direction or only in the second direction according to the operation. Can be. In addition, the controller may set the rotation speed and the holding time for each rotation direction according to the operation mode.
동작모드는 오염물제거, 세척, 스팀세척, 헹굼 등의 단계로 구분되어 설정될 수 있다. The operation mode may be set to be divided into stages such as decontamination, washing, steam washing, and rinsing.
회전방향 감지 시, 제어부는 회전방향 감지가 용이하도록 세척 단계보다 적은 양의 물을 급수하여 회전방향을 감지한 후, 추가 급수하여 설정된 동작이 시작되도록 한다. When detecting the rotational direction, the control unit detects the rotational direction by supplying a smaller amount of water than the washing step so as to easily detect the rotational direction, and then additionally supply the water to start the set operation.
회전방향 감지시, 급수량은, 예비세척의 급수량의 60 내지 80% 로 설정할 수 있다. 예를 들어 급수량은 1.5 내지 2.7L 로 설정될 수 있다. 이는 식기 세척기의 크기, 세척(또는 예비세척)단계에서 급수되는 급수량에 따라 상이하게 설정될 수 있다. When the rotation direction is detected, the water supply amount can be set to 60 to 80% of the water supply amount of the prewash. For example, the water supply amount may be set to 1.5 to 2.7L. This may be set differently depending on the size of the dishwasher, the amount of water supplied in the washing (or pre-washing) step.
로우분사암의 회전방향 감지는 세척모터의 석션현상 발생 시, 전류값의 리플을 이용하는 것이기는 하나, 회전방향에 따라 분사되는 세척수의 양이 상이한 점을 이용하여 어느 하나의 방향에서는 석션이 발생하지 않고, 반대 방향에서는 석션이 발생하는 회전속도를 결정하여 회전방향을 감지할 수 있다. Rotational direction detection of the low injection rock uses the ripple of the current value when the suction of the washing motor occurs, but the suction does not occur in any one direction due to the difference in the amount of washing water sprayed according to the rotational direction. Instead, the direction of rotation can be detected by determining the rotation speed at which the suction occurs in the opposite direction.
세척수의 양이 많은 경우 석션현상이 발생하기까지 많은 시간이 소요되므로, 회전방향 판단에 많은 시간이 소요되므로, 제어부는 적은 양의 세척수를 급수한다. 다만 세척수의 양이 너무 적은 경우, 회전방향에 관계없이 석션이 발생할 수 있다. 그에 따라 회전방향 감지시의 급수량은, 예비세척 시 급수량을 기준으로 60% 내지 80% 이상으로 급수하도록 한다. If the amount of washing water is large, it takes a lot of time until the suction phenomenon occurs, because it takes a lot of time to determine the rotation direction, the control unit waters a small amount of washing water. However, if the amount of wash water is too small, suction may occur regardless of the rotation direction. Accordingly, the amount of water supplied at the time of detecting the rotation direction is 60% to 80% or more based on the amount of water supplied at the time of preliminary washing.
제어부는 로우분사암의 회전방향을 감지한 후, 예비세척의 수위까지 추가 급수 한 후, 설정된 동작을 수행한다. The control unit detects the rotational direction of the low sandblasting arm, additionally supplies water to the level of preliminary washing, and then performs a set operation.
또한, 예비세척 전에 세척대상인 식기에는 다량의 오염물이 존재하므로, 오염물에 의해 필터가 막힐 수 있으므로, 제어부는 세척모터의 회전속도가 설정속도 이상으로 증가하지 않도록 제한한다. 제어부는 세척모터 기동을 위한 최소 회전수 내지 설정속도의 범위 내에서 속도를 가변하며 로우분사암의 회전방향을 감지한다. In addition, since a large amount of contaminants are present in the dish to be cleaned before the pre-cleaning, the filter may be blocked by the contaminants, so that the controller restricts the rotational speed of the washing motor from increasing beyond the set speed. The controller varies the speed within the range of the minimum rotation speed to the set speed for starting the washing motor and detects the rotational direction of the low injection arm.
회전방향을 감지하는 경우, 단, 급수된 세척수의 양에 비하여 세척모터의 회전속도가 높게 나타나는 경우 분사 암이 정상적으로 동작하지 않으므로, 회전방향 판단을 중지할 수 있다. 특히 고속 회전 시, 분사되는 세척수에 의해 오염물이 낙하여 회전방향 감지를 위한 전류값이 가변되므로 정확한 방향 감지를 위하여 오렴물이 낙하하지 않는 저속으로 회전시키는 것이 바람직하다. 또한, 1400rpm 미만의 저속의 경우 분사 암이 정상적으로 회전하지 못한다. 그에 따라 회전속도는 1400rpm 내지 2500rpm으로 설정할 수 있다. In the case of detecting the rotational direction, however, when the rotational speed of the washing motor is higher than the amount of the water supplied, the injection arm does not operate normally, and thus the rotational direction determination can be stopped. In particular, during high-speed rotation, pollutants are dropped by the sprayed washing water, so that the current value for detecting the rotation direction is variable, so it is preferable to rotate at low speed so that no dirt falls. Also, at lower speeds below 1400 rpm, the injection arm does not rotate normally. Accordingly, the rotation speed may be set to 1400 rpm to 2500 rpm.
제어부는 회전속도 범위 내에서 제어하여 회전방향을 감지한다. 이때, 회전속도는 세척모터의 회전속도이다. 분사 암은 구동원이 별도로 구비되는 것이 아니라 분사구를 통해 분사되는 세척수의 분사력에 대한 반발력으로 회전하므로, 분사 암 자체의 회전속도를 제어하는 것은 아니다. The controller detects the rotation direction by controlling within the rotation speed range. At this time, the rotation speed is the rotation speed of the washing motor. The injection arm is not provided with a drive source separately, but rotates with a repulsive force against the injection force of the washing water injected through the injection hole, and thus does not control the rotational speed of the injection arm itself.
또한, 제어부는 일정시간 동작시켜, 안정화된 이후의 전류값을 이용하여 회전방향을 판단한다. 제어부는 제품에 따라 전류값에 차이가 있으므로 전류값을 샘플링하여 최대값과 최소값의 차이를 이용하여 리플 발생 여부를 판단할 수 있다. In addition, the controller is operated for a predetermined time to determine the rotation direction by using the current value after stabilization. The controller may determine whether ripple occurs by sampling a current value and using a difference between a maximum value and a minimum value because the current value varies depending on a product.
도 7 은 도 2의 분사 암 어셈블리의 회전 방향에 따른, 전류 및 회전속도가 도시된 그래프이다. 7 is a graph showing the current and the rotational speed, according to the rotational direction of the injection arm assembly of FIG.
세척모터가 제어부의 제어명령에 따라 소정 속도(S1)으로 동작하면, 전류감지부를 세척모터 동작 중, 전류를 감지하여 제어부로 인가한다. When the washing motor operates at a predetermined speed S1 according to a control command of the controller, the current sensing unit senses a current and applies the current to the controller during the washing motor operation.
세척모터의 동작에 의해 세척수가 반사암, 특히 로우분사암으로 공급되고, 그에 따라 로우분사암이 회전하며 분사구를 통해 세척수를, 세척대상인 식기로 분사한다. 이때 로우분사암은 제 1 방향 또는 제 2 방향 중 어느 하나의 방향으로 회전한다. By the operation of the washing motor, the washing water is supplied to the reflective rock, in particular, the low spraying rock, and thus the low spraying rock rotates and sprays the washing water into the dish to be washed through the injection hole. At this time, the low injection rock is rotated in either of the first direction or the second direction.
세척모터가 소정 회전속도로 동작하는 중, 전류감지부는 전류를 감지한다. 제어부(50)는 전류감지부에의해 감지되는 전류 중, 초기 안정화 시간을 제외한 시간 동안의 전류값을 바탕으로 분사 암의 회전방향을 판단할 수 있다. 예를 들어 분사 암이 약 10초 동안 회전동작하는 경우, 3초를 안정화 시간으로 보고, 이후 7초의 전류값을 이용하여 회전방향을 판단할 수 있다. While the washing motor is operating at a predetermined rotational speed, the current sensing unit senses the current. The controller 50 may determine the rotation direction of the injection arm based on the current value during the time excluding the initial stabilization time among the currents sensed by the current detector. For example, when the injection arm rotates for about 10 seconds, 3 seconds may be regarded as a stabilization time, and then the rotation direction may be determined using a current value of 7 seconds.
제어부는 세척모터를 정지한 후, 재 기동하여 감지되는 전류값을 통해 분사 암, 특히 로우분사암의 회전방향을 최종판단 할 수 있다. The controller may determine the rotation direction of the injection arm, in particular the low injection arm, through the current value detected by restarting the washing motor after stopping the washing motor.
예를 들어, 세척모터가 특정 회전속도로 동작하는 때에, 분사 암이 반시계 방향으로 회전하는 경우 도 7의 (a)와 같이 전류값이 감지된다. 또한, 세턱모터가 동일한 회전속도로 기동하여 분사 암이 시계방향으로 회전하는 경우 도 7의 (b)와 같이 전류값이 감지된다. For example, when the washing motor operates at a specific rotational speed, when the injection arm rotates counterclockwise, a current value is sensed as shown in FIG. In addition, when the step motor is started at the same rotation speed and the injection arm rotates clockwise, the current value is sensed as shown in FIG.
따라서 제어부는 회전방향을 감지하기 위한 세척모터를 회전속도를 결정한 후, 해당 회전속도로 세척모터를 동작시켜, 분사암이 회전하는 동안 감지되는 세척모터의 전류값의 변화(전류리플)에 따라 분사 암의 회전방향을 판단할 수 있다. Therefore, the control unit determines the rotational speed of the washing motor for detecting the rotational direction, and then operates the washing motor at the corresponding rotational speed, and then sprays it according to the change in the current value (current ripple) of the washing motor detected while the injection arm is rotating. The direction of rotation of the arm can be determined.
분사 암은 시계방향으로 회전하는 경우와 반시계방향으로 회전하는 경우 각각 세척수의 분사방향이 상이하고, 분사량에 차이가 있으므로, 실제 전류리플이 발생하는 속도에 차이가 발생할 수 있다. When the injection arm rotates in the clockwise direction and in the counterclockwise direction, the injection direction of the washing water is different from each other and the injection amount is different. Therefore, a difference may occur in the speed at which the actual current ripple occurs.
분사 암이 반시계방향으로 회전하는 경우, 시계방향으로 회전하는 경우보다, 더 낮은 회전속도에 전류리플이 발생한다. When the injection arm rotates counterclockwise, current ripple occurs at a lower rotational speed than when rotated clockwise.
따라서, 동일한 회전속도로 회전 시, 반시계방향으로 회전하는 경우에는 전류리플이 발생하나 시계방향으로 회전하는 경우에는 전류리플이 발생하지 않을 수 있다. 또한, 시계방향으로 회전시 전류리플이 발생하는 회전속도라면, 동일한 회전속도에서 분사암이 반시계방향으로 회전하면 반드시 전류리플이 발생하게 된다. Therefore, when rotating at the same rotational speed, the current ripple occurs when rotating in the counterclockwise direction, the current ripple may not occur when rotating in the clockwise direction. In addition, if the rotational speed in which the current ripple occurs when rotating in the clockwise direction, if the injection arm rotates in the counterclockwise direction at the same rotational speed will necessarily generate a current ripple.
그에 따라 제어부는 세척모터를 1차 기동하여 정지시킨 후 동일한 속도로 2차 기동하여, 1차 기동시의 전류값과 2차 기동시의 전류값을 바탕으로 리플이 발생하는 순서에 따라 전류를 판단할 수 있다. Accordingly, the control unit starts and stops the washing motor first, and then starts the second time at the same speed. Based on the current value at the first start and the current value at the second start, the controller judges the current according to the order in which the ripple occurs. can do.
1차 기동 시, 리플이 발생하고, 2차 기동시 리플이 발생하지 않는 경우, 1차 기동시 반시계방향으로 회전한 것으로 판단할 수 있다. 다음 회전 시 분사암은 반시계방향으로 회전하게 된다. If ripple occurs at the first start and no ripple occurs at the second start, it may be determined that the motor rotates counterclockwise at the first start. At the next rotation, the injection arm will rotate counterclockwise.
또한, 1차 및 2차 기동시, 모두 리플이 발생하는 경우에는 1차 기동시 시계방향으로 회전한 것으로 판단할 수 있다. 다음 회전 시 분사암은 시계방향으로 회전하게 된다. In addition, when ripple occurs in both the primary and secondary startups, it can be determined that the clockwise rotation has occurred during the primary startup. At the next turn, the injection arm will rotate clockwise.
또한, 제어부는 전류값에 대하여, 전류값의 최대값과 최소값의 차이를 연산하여 회전방향을 판단한다. 제품 또는 설치 위치에 따라 전류값에 차이가 있으므로, 전류값에 대한 최대값과 최소값의 차이를 연산하여 판단할 수 있다. In addition, the controller determines the rotation direction by calculating a difference between the maximum value and the minimum value of the current value with respect to the current value. Since there is a difference in the current value depending on the product or installation location, it can be determined by calculating the difference between the maximum value and the minimum value for the current value.
제어부(50)는 제 1 구간(D1) 또는 제 2 구간(D2)의 전류값에 대하여 최대값과 최소값의 차이를 연산하고, 전류차가 설정전류 이상인지 여부를 판단하여 리플 발생 여부를 판단한다. The controller 50 calculates a difference between the maximum value and the minimum value with respect to the current value in the first section D1 or the second section D2, and determines whether a ripple occurs by determining whether the current difference is greater than or equal to the set current.
제어부(50)는 리플이 발생하는 경우 세척모터를 정지 후 재 기동하여, 분사 암이 반대방향으로 회전하는 동안의 리플발생 여부를 다시 판단하여, 최종적으로 분사 암의 회전방향을 판단할 수 있다. When the ripple occurs, the control unit 50 may restart the washing motor after stopping to determine whether the ripple occurs while the injection arm rotates in the opposite direction, and finally determine the rotation direction of the injection arm.
1차로 전류에 리플이 발생한 상태에서 반대방향으로 회전시 리플이 발생하면 초기에 시계방향 회전으로 판단하고, 전류가 안정된 경우에는 초기 구동 시 반시계방향으로 회전한 것으로 판단할 수 있다. If the ripple occurs when the current is rippled in the reverse direction in the first direction, the clockwise rotation is initially determined. If the current is stable, it may be determined that the clockwise rotation is performed during the initial driving.
그에 따라 제어부는 회전속도를 단계적으로 증가시키면서 분사 암의 회전방향을 판단할 수 있다. Accordingly, the controller may determine the rotational direction of the injection arm while gradually increasing the rotational speed.
도 8 은 본 발명의 분사 암 어셈블리의 회전방향 제어방법이 도시된 순서도 이다. 8 is a flow chart illustrating a rotation direction control method of the injection arm assembly of the present invention.
도 8에 도시된 바와 같이, 설정된 동작을 수행하기 전, 제어부는 분사 암, 특히 로우분사암의 회전방향을 감지한다. As shown in FIG. 8, before performing the set operation, the controller detects a rotation direction of the injection arm, in particular, the low injection arm.
제어부는 급수밸브를 제어하여 급수를 시작한다(S410). 급수량은 예비 세척 시의 급수량보다 적게 설정된다. 회전방향 감지 시, 예비 세척의 급수량의 60-80%로 급수할 수 있다. 예를 들어 예비세척 시 3L를 급수하는 경우, 최소 1.8 내지 2.4L로 급수할 수 있다. The control unit starts the water supply by controlling the water supply valve (S410). The amount of water supplied is set less than that of the prewash. When sensing the direction of rotation, water can be supplied at 60-80% of the pre-wash water supply. For example, if 3L of water is pre-washed, it can be supplied at least 1.8 to 2.4L.
제어부는 급수가 완료되면, 세척모터의 회전속도를 제 1 속도를 설정하여(S420), 세척모터를 동작시킨다(S430).When the water supply is completed, by setting the first speed to the rotational speed of the washing motor (S420), to operate the washing motor (S430).
세척모터가 동작하면, 세척수가 분사 암을 통해 분사되고, 세척수의 분사력에 대한 반작용으로 분사 암이 회전한다. 이때, 회전방향은 이전, 분사 암 회전방향의 반대방향이다. When the washing motor is operated, the washing water is injected through the spraying arm, and the spraying arm rotates in response to the spraying force of the washing water. At this time, the rotation direction is the opposite direction of the injection arm rotation direction before.
예를 들어, 분사 암 어셈블리는 제 1 방향으로 회전 한 후 정지하면, 다음 회전시 제 1 방향의 반대방향인 제 2 방향으로 회전한다. 제 2 방향 회전 후, 정지하면 다음 회전 시 제 1 방향으로 회전하는 방식이다. For example, when the injection arm assembly stops after rotating in the first direction, the injection arm assembly rotates in a second direction opposite to the first direction during the next rotation. After the rotation in the second direction, the motor rotates in the first direction during the next rotation.
제어부는 이와 같이 정지 시 회전방향이 변경되는 분사 암 어셈블리의 회전방향을 감지하기 위해 예비 세척 또는 세척 전에 회전방향을 감지하도록 한다. The control unit detects the rotational direction before the pre-cleaning or cleaning to detect the rotational direction of the injection arm assembly in which the rotational direction is changed when stopped.
전류감지부는 지정된 시간 동안 세척모터의 전류를 감지하여 제어부로 인가한다. 제어부는 지정된 시간 동안 세척모터의 전류의 최대값과 최소값의 전류차를 연산한다(S440).The current detector detects the current of the washing motor for the specified time and applies it to the controller. The control unit calculates a current difference between the maximum value and the minimum value of the current of the washing motor for a specified time (S440).
연산된 전류차가 설정전류보다 큰 경우(S460), 제어부는 세척모터를 정지시킨 후(S500), 다시 세척모터를 동작시킨다(S510). If the calculated current difference is greater than the set current (S460), the control unit stops the washing motor (S500), and operates the washing motor again (S510).
세척모터가 동작하면, 분사 암 어셈블리는 앞서 회전한 방향과는 반대방향으로 회전하게 된다. When the cleaning motor is operated, the injection arm assembly is rotated in a direction opposite to the direction previously rotated.
전류감지부는 분사 암이 회전하는 동안 지정된 시간에 대한 전류를 감지한다. The current sensing unit senses the current for a specified time while the injection arm is rotating.
제어부는 감지된 전류의 최대값과 최소값에 대한 전류차를 연산하고, 전류차가 설정전류 이상인지 여부를 판단한다(S540). The controller calculates a current difference between the maximum value and the minimum value of the sensed current, and determines whether the current difference is greater than or equal to the set current (S540).
제어부는 전류차가 설정전류 이상인 경우, 즉 1차 회전 및 2차 회전에서 모두 전류차가 설정전류 이상인 경우 분사 암이 1차 회전 시 시계방향으로 회전한 것으로 판단한다(S550). 따라서, 분사암은 다음 회전 시 시계방향으로 회전하게 된다. The controller determines that the injection arm is rotated clockwise during the first rotation when the current difference is greater than or equal to the set current, that is, when the current difference is greater than or equal to the set current in both the primary rotation and the secondary rotation (S550). Therefore, the injection arm rotates clockwise at the next rotation.
또한, 제어부는 2차 회전 시 전류차가 설정전류 미만인 경우에는 1차 회전 시 반시계방향으로 회전하고, 2차 회전시 시계방향으로 회전한 것으로 판단할 수 있다(S560). 따라서, 분사암은 다음 회전 시 반시계방향으로 회전하게 된다. In addition, when the current difference is less than the set current during the second rotation, the controller may determine that the first rotation rotates counterclockwise, and the second rotation rotates clockwise (S560). Therefore, the injection arm rotates counterclockwise at the next rotation.
한편, 1차 회전 시, 전류차가 설정전류 미만인 경우(S460), 제어부는 세척모터 정지 후, 세척모터의 속도를 증가시킨다(S480). 제어부는 증가된 속도로 세척모터를 동작시킨다. 세척모터의 전류값을 감지하고 전류차를 연산하여 비교하는 것을 반복한다(S430 내지 S480). On the other hand, during the first rotation, if the current difference is less than the set current (S460), after the washing motor stops, the control unit increases the speed of the washing motor (S480). The control unit operates the cleaning motor at an increased speed. The current value of the washing motor is sensed and the current difference is calculated and compared (S430 to S480).
제어부는 전류변화가 발생하기까지 세척모터의 회전속도를 증가시킨다. 제어부는 세척모터의 회전속도를 증가시키는 과정에서 전류변화가 발생하면 해당 회전속도를 회전방향감지를 위한 회전속도로 결정할 수 있다. The control unit increases the rotational speed of the cleaning motor until a current change occurs. If a current change occurs in the process of increasing the rotational speed of the washing motor, the controller may determine the rotational speed as the rotational speed for detecting the rotational direction.
세척모터의 회전속도를 증가시키는 경우, 현재 회전속도가 최대치인지 판단하고, 더이상 증가시킬 수 없는 경우(S470) 제어부는 회전방향 감지에 실패한 것으로 판단하여 에러를 출력할 수 있다(S490).When the rotational speed of the washing motor is increased, it is determined whether the current rotational speed is the maximum value, and if it cannot be increased any more (S470), the controller may determine that the rotational direction has failed to output an error (S490).
전류변화를 통해 회전방향이 감지되면, 제어부는 급수밸브를 제어하여 세척수를 추가 급수하고, 감지된 회전방향을 바탕으로 예비 세척 또는 세척과정(세척, 헹굼 등)에서의 동작을 제어한다(S570). When the rotation direction is detected through the current change, the controller controls the water supply valve to additionally supply the washing water, and controls the operation in the preliminary washing or washing process (washing, rinsing, etc.) based on the detected rotation direction (S570). .
예비 세척, 세척, 헹굼의 각 단계에서 제어부는 분사 암이 특정 회전방향으로 회전하도록 설정할 수 있다. 또한, 제어부는 특정 단계에서 분사 암의 시계방향회전과 방시계방향 회전의 비율을 설정하거나 또는 변경하여 그 동작을 제어할 수 있다. In each stage of preliminary washing, washing and rinsing, the control unit may set the injection arm to rotate in a specific rotational direction. In addition, the control unit may control the operation by setting or changing the ratio of the clockwise rotation and the clockwise rotation of the injection arm in a specific step.
회전방향 감지에 실패하는 경우, 회전방향 감지를 추가 수행할 수 있고, 경우에 따라 회전방향에 관계없이 동작을 제어할 수 있다. When the rotation direction detection fails, the rotation direction detection may be further performed, and in some cases, the operation may be controlled regardless of the rotation direction.
예를 들어 예비 세척 중, 제1 방향으로 설정된 상태에서 제 2 방향으로 회전시키려면 짧은 시간 동안 1회 동작시킨 후 정지하고, 설정된 동작을 수행하면 원하는 방향인 제 2 방향으로 회전시킬 수 있게 된다. For example, during the preliminary washing, in order to rotate in the second direction in the state set in the first direction, the motor is stopped once for a short time and stopped, and when the set operation is performed, the second direction may be rotated in the desired direction.
분사 암 어셈플리의 회전방향은 앞서 설명한 바와 같이 1회 정지시마다 변경되므로, 이를 카운트하여 동작단계 또는 동작모드에 따라 회전방향을 제어할 수 있다. As described above, since the rotation direction of the injection arm assembly is changed every stop, the rotation direction may be controlled according to an operation step or an operation mode.
도 9 는 본 발명의 세척모터의 동작에 따른 분사 암 어셈블리의 회전방향을 감지하기 위한 전류 및 회전속도의 변화가 도시된 도이다. 9 is a view showing a change in current and rotational speed for detecting the rotational direction of the injection arm assembly according to the operation of the cleaning motor of the present invention.
도 9에 도시된 바와 같이, 복수의 식기 세척기에 대하여 회전방향에 따른 전류값의 차이를 비교하면 다음과 같다. As shown in Figure 9, when comparing the difference in the current value according to the rotation direction for the plurality of dishwashers as follows.
식기 세척기는, 제품의 용량, 세턱모터의 성능, 급수된 수량에 따라 식기 세척기에서 전류값에 차이가 발생하는 회전속도는 상이할 수 있다. The dishwasher may have a rotation speed at which a difference in current value occurs in the dishwasher according to the capacity of the product, the performance of the stepper motor, and the number of water supplied.
도 9의 (a), (b), (c)는 각각 상이한 제품으로, 동일한 양의 세척수를 공급하였을 때, 전류차가 회전방향에 따라 상이하게 나타나는 회전속도를 측정한 것이다. (A), (b) and (c) of FIG. 9 are different products, and when the same amount of washing water is supplied, the rotational speed at which the current difference is different depending on the rotational direction is measured.
이와 같이 식기 세척기에서 전류차를 통한 회전방향에 따른 차이가 나타나는 속도에는 각각 차이가 있으나, 제품에 관계없이 전류차가 발생하는 속도가 각각 형성된다. As such, although there are differences in speeds in which the difference according to the rotation direction through the current difference in the dishwasher is different, the speed at which the current difference occurs regardless of the product is formed, respectively.
특히, 제품에 관계없이 모두 시계방향으로 회전하는 경우와 반시계방향으로 회전하는 경우에 대하여 각각 전류값의 차이가 나타남을 알 수 있다. In particular, it can be seen that there is a difference in the current values for both the clockwise rotation and the counterclockwise rotation regardless of the product.
동일한 회전속도에서, 시계방향으로 회전하는 경우와 반시계방향으로 회전하는 경우를 비교하면, 반시계방향 회전 시 전류차가 크게 발생함을 알 수 있다. 반시계방향으로 회전하는 경우의 분사력이 시계방향으로 회전하는 경우보다 크므로, 분사 암 어셈플리 내부로 유입되는 세척수의 양이 많아지고, 그에 따라 식기 세척기 내부의 수위가 감소하여 석션현상이 더 빠르게 발생한다. At the same rotational speed, when the clockwise rotation and the counterclockwise rotation are compared, it can be seen that a large current difference occurs in the counterclockwise rotation. Since the spraying force when rotating counterclockwise is larger than when rotating clockwise, the amount of washing water flowing into the injection arm assembly increases, so that the water level inside the dishwasher decreases, so that the suction phenomenon is faster. Occurs.
따라서, 본 발명은 구동원이 구비되지 않은 분사 암 어셈블리에 대하여, 세척모터의 회전속도를 단계적으로 증가시키면서 전류차가 발생하는 회전속도를 1차 확인하고, 동일한 회전속도에서 각 회전방향에 대하여 전류차가 발생하는지 여부를 통해 회전방향을 감지할 수 있다. Therefore, in the present invention, the injection arm assembly having no driving source checks the rotational speed at which the current difference occurs while increasing the rotational speed of the washing motor step by step, and generates a current difference in each rotational direction at the same rotational speed. The direction of rotation can be detected through the
또한, 본 발명은 회전방향을 감지함에 따라, 식기 세척기의 동작모드에 따라 회전방향을 상이하게 적용함으로써, 세척수의 분사력을 조절하여 세척 및 헹굼성능을 향샹시킬 수 있다. In addition, the present invention can improve the washing and rinsing performance by adjusting the spraying force of the washing water by differently applying the rotational direction according to the operation mode of the dishwasher as the rotational direction is sensed.
이하, 상기 분사 암 어셈블리(10)의 각각의 구성요소에 대하여 상세히 설명한다.Hereinafter, each component of the injection arm assembly 10 will be described in detail.
도 10 은 도 3의 분사 암 어셈블리를 Ⅰ-Ⅰ`에 따라 절개한 단면도이다.FIG. 10 is a cross-sectional view of the injection arm assembly of FIG. 3 taken along line II ′. FIG.
도 10을 참조하면, 상기 분사 암 어셈블리(10)는 상기 섬프커버(20)에 체결된다. 먼저, 상기 암 홀더(300)는 상기 암 홀더(300)에 구비된 이탈 방지부(315)가 상기 섬프커버(20)에 구비된 암 홀더 체결부(225)에 체결됨으로써, 상기 섬프커버(20)에 회전 가능하게 고정될 수 있다.Referring to FIG. 10, the injection arm assembly 10 is fastened to the sump cover 20. First, the arm holder 300 is coupled to the arm holder fastening part 225 provided in the sump cover 20 by the separation prevention part 315 provided in the arm holder 300, thereby providing the sump cover 20. It can be rotatably fixed to).
다음으로, 상기 고정기어부(200)에 구비되는 체결부(223)는 상기 섬프커버(20)에 구비되는 기어 고정부(224)에 체결된다. 이에 따라, 상기 고정기어부(200)는 상기 섬프커버(20)와 결합한다. 상기 고정기어부(200)는 상기 암 홀더(300)와 달리 회전 불가능하도록 고정된다.Next, the fastening part 223 provided in the fixed gear part 200 is fastened to the gear fixing part 224 provided in the sump cover 20. Accordingly, the fixed gear part 200 is coupled to the sump cover 20. Unlike the arm holder 300, the fixed gear part 200 is fixed to be not rotatable.
상기 회전기어부(500)는 상기 분사 암(100)에 구비되는 기어 회전축(135)에 삽입된다. 이에 따라, 상기 회전기어부(500)는 상기 분사 암(100)과 결합되며, 상기 기어 회전축(135)을 중심으로 회전 가능하다.The rotary gear unit 500 is inserted into the gear rotating shaft 135 provided in the injection arm 100. Accordingly, the rotary gear unit 500 is coupled to the injection arm 100, it is possible to rotate around the gear axis of rotation (135).
상기 링크부재(600)는 상기 분사 암(100)에 구비된 가이드 돌기(136, 137)에 의해 지지될 수 있다. 또한, 상기 링크부재(600)에는 상기 회전기어부(500)에 구비된 편심돌기(530)가 삽입될 수 있다. 상기 고정기어부(200)의 자전에 의해 상기 편심돌기(530)는 상기 링크부재(600)는 소정의 범위 내에서 왕복 운동시킬 수 있다.The link member 600 may be supported by guide protrusions 136 and 137 provided on the injection arm 100. In addition, an eccentric protrusion 530 provided in the rotary gear part 500 may be inserted into the link member 600. The eccentric protrusion 530 may reciprocate the link member 600 within a predetermined range by the rotation of the fixed gear unit 200.
상기 분사 암(100)에 구비되는 체결돌기(182)는 상기 암 홀더(300)에 구비되는 체결돌기 수용부(332)에 삽입된다. 이에 따라, 상기 암 홀더(300)는 상기 분사 암(100)과 결합한다.The fastening protrusion 182 provided in the injection arm 100 is inserted into the fastening protrusion receiving portion 332 provided in the arm holder 300. Accordingly, the arm holder 300 is coupled to the injection arm 100.
상기 분사 암(100)의 내부에는 상기 암 홀더(300)로부터 유입된 세척수가 유동하는 메인 유로(117, 118)가 형성될 수 있다. 구체적으로, 상기 메인 유로(117, 118)는 상기 제1암(113)의 내부에 형성되는 제1메인유로(117)와, 상기 제2암(114)의 내부에 형성되는 제2메인 유로(118)를 포함한다. 상기 제1메인 유로(117)와 상기 제2메인 유로(118)는 격벽(116)에 의해 서로 구획될 수 있다. 상기 제1메인 유로(117)를 유동하는 세척수는 상기 제1상부 분사구(123)를 통해 외부로 분사될 수 있으며, 상기 제2메인 유로(118)를 유동하는 세척수는 상기 제2상부 분사구(124)를 통해 외부로 분사될 수 있다. 상기 메인 유로(117, 118)를 ‘세척수 유로’라 이름할 수 있다.The main flow paths 117 and 118 through which the washing water flowing from the arm holder 300 flows may be formed in the injection arm 100. In detail, the main flow paths 117 and 118 may include a first main flow path 117 formed inside the first arm 113 and a second main flow path formed inside the second arm 114. 118). The first main flow path 117 and the second main flow path 118 may be partitioned from each other by the partition wall 116. The washing water flowing through the first main flow path 117 may be sprayed to the outside through the first upper injection hole 123, and the washing water flowing through the second main flow path 118 may be the second upper injection hole 124. It may be sprayed to the outside through). The main flow paths 117 and 118 may be referred to as 'wash water flow paths'.
상기 유로전환부(400)는 상기 암 홀더(300)에 구비되는 암 홀더 챔버(320) 내부에 수용된다. 상기 암 홀더 챔버(320)에 세척수가 유입됨에 따라 상기 암 홀더 챔버(320) 내부의 수압이 높아지면 상기 유로전환부(400)는 상측으로 이동하고, 상기 암 홀더 챔버(320)에 세척수 유입이 중단되면 상기 암 홀더 챔버(320) 내부의 수압이 낮아지면서 상기 유로전환부(400)는 하측으로 이동할 수 있다.The flow path switching unit 400 is accommodated in the arm holder chamber 320 provided in the arm holder 300. When the water pressure inside the arm holder chamber 320 increases as the wash water flows into the arm holder chamber 320, the flow path switching unit 400 moves upwards, and the wash water flows into the arm holder chamber 320. If stopped, the water pressure inside the arm holder chamber 320 is lowered and the flow path switching unit 400 may move downward.
또한, 상기 암 홀더 챔버(320) 내부에 수용된 세척수는 상기 메인 암(110)으로 유입될 수 있다. 상기 암 홀더 챔버(320)에는 상기 유로전환부(400)가 수용될 수 있다. 상기 암 홀더 챔버(320)로 유입된 세척수는 상기 유로전환부(400)에 의해 상기 다수의 유입구에 선택적으로 유입될 수 있다.In addition, the wash water accommodated in the arm holder chamber 320 may flow into the main arm 110. The flow path switching unit 400 may be accommodated in the arm holder chamber 320. The washing water introduced into the arm holder chamber 320 may be selectively introduced into the plurality of inlets by the flow path switching unit 400.
분사 암(100)은 메인 암(110)과, 보조 암(140, 150) 및 상기 메인 암(110)과 보조 암(140, 150)을 연결하는 보조 암 연결부재(160)를 포함할 수 있다. 상기 메인 암(110)은 상부 프레임(120)과 하부 프레임(130)을 포함할 수 있다.The injection arm 100 may include a main arm 110, an auxiliary arm 140 and 150, and an auxiliary arm connecting member 160 connecting the main arm 110 and the auxiliary arms 140 and 150. . The main arm 110 may include an upper frame 120 and a lower frame 130.
상기 하부 프레임(130)에는 상기 메인 암(110)으로 유입된 세척수가 분사되는 하부 분사구(133, 134)가 형성될수 있다. 상기 메인 암(110)으로 유입된 세척수는 상기 하부 분사구(133, 134)를 통해 상기 메인 암(110)의 하방으로 분사될 수 있다. 상기 상부 분사구(123, 124) 및 상기 하부 분사구(133, 134)를 통칭하여 '메인 분사구'라 이름할 수 있다.The lower frame 130 may have lower injection holes 133 and 134 through which the washing water introduced into the main arm 110 is sprayed. The washing water introduced into the main arm 110 may be injected downward of the main arm 110 through the lower injection holes 133 and 134. The upper injection holes 123 and 124 and the lower injection holes 133 and 134 may be collectively referred to as 'main injection holes'.
상기 상부 분사구(123, 124)에서 상방으로 세척수가 분사되는 경우에는 상기 메인 암(110)의 하방으로 반발력이 발생하며, 상기 하부 분사구(133, 134)에서 하방으로 세척수가 분사되는 경우에는 상기 메인 암(110)의 상방으로 반발력이 발생할 수 있다. 이와 같이, 상부 또는 하부 중 어느 하나의 분사구에서만 세척수가 분사되면 상기 메인 암(110)에 상방 또는 하방으로 반발력이 작용하여 상기 분사 암 어셈블리(10)의 결합에 무리를 줄 수 있다.When washing water is injected upward from the upper injection holes 123 and 124, a repulsion force is generated below the main arm 110, and when washing water is injected downward from the lower injection holes 133 and 134, the main reaction force is generated. Repulsive force may occur above the arm 110. As such, when the washing water is sprayed only at one of the upper and lower injection holes, the repulsive force acts upward or downward on the main arm 110 to impose a coupling force on the injection arm assembly 10.
따라서, 상기 메인 암(110)으로 유입된 세척수가 상기 상부 분사구(123, 124)와 상기 하부 분사구(133, 134)를 통해 동시에 분사되도록 함으로써, 세척수의 분사에 의해 상기 메인 암(110)에 작용하는 상하 방향으로의 반발력을 상쇄시킬 수 있다.Therefore, the washing water introduced into the main arm 110 is simultaneously sprayed through the upper injection holes 123 and 124 and the lower injection holes 133 and 134, thereby acting on the main arm 110 by spraying the washing water. The repulsive force in the vertical direction can be canceled.
상기 분사 암(100)은 상기 링크부재(600)의 움직임을 안내하기 위한 가이드 돌기(136, 137)를 포함할 수 있다. 상기 보조 암(140, 150)은 상기 링크부재(600)로부터 동력을 전달받는 동력 전달부(146, 156)를 포함할 수 있다. 상기 링크부재(600)가 상기 회전기어부(500)로부터 전달받은 동력을 상기 동력 전달부(146, 156)로 전달함으로써, 상기 보조 암(140, 150)은 왕복하여 회전할 수 있다. 즉, 상기 링크부재(600)의 왕복운동이 상기 보조 암(140, 150)의 회전 운동으로 전환된다.The injection arm 100 may include guide protrusions 136 and 137 for guiding the movement of the link member 600. The auxiliary arms 140 and 150 may include power transmission units 146 and 156 that receive power from the link member 600. As the link member 600 transmits the power transmitted from the rotary gear unit 500 to the power transmission units 146 and 156, the auxiliary arms 140 and 150 may rotate reciprocally. That is, the reciprocating motion of the link member 600 is converted to the rotational motion of the auxiliary arms 140 and 150.
도 11 은 도 4의 유로전환부의 사시도이며, 도 12 는 도 11의 유로전환부를 아래에서 본 도면이다.FIG. 11 is a perspective view of the flow path switching unit of FIG. 4, and FIG. 12 is a view of the flow path switching unit of FIG. 11 viewed from below.
도 11 및 도 12을 참조하면, 본 발명의 일 실시 예에 따른 유로전환부(400)는 전환부본체(410)와, 전환부본체(410)의 상부면에 구비되는 상부기어 및 (410)의 하부면에 구비되는 하부기어(430)를 포함한다. 상부기어는 복수의 상부기어(421, 422, 423, 424)를 포함할 수 있다.11 and 12, the flow path switching unit 400 according to an embodiment of the present invention is the switching unit body 410, the upper gear and the 410 provided on the upper surface of the switching unit body 410 It includes a lower gear 430 provided on the lower surface of the. The upper gear may include a plurality of upper gears 421, 422, 423, and 424.
전환부본체(410)는 암 홀더 챔버(320)의 유입관(321) 내부에 수용되며, 암 홀더 챔버(320) 내부의 수압에 따라 암 홀더 챔버(320) 내부에서 상하방향으로 왕복운동할 수 있다. 또한, 전환부본체(410)는 유입관(321)의 횡단면 형상과 대응하도록 디스크 형상으로 이루어질 수 있다. The switching unit body 410 is accommodated in the inlet pipe 321 of the arm holder chamber 320, it can reciprocate up and down in the arm holder chamber 320 in accordance with the water pressure inside the arm holder chamber 320. have. In addition, the switching unit body 410 may be formed in a disk shape to correspond to the cross-sectional shape of the inlet pipe 321.
전환부본체(410)에는 암 홀더 챔버(320)의 내부로 유입된 세척수가 유동하는 개방홀(413, 414)이 구비될 수 있다. 복수의 상부기어(421, 422, 423, 424)가 상부기어 치합부(139)에 치합되면, 개방홀(413, 414)은 각각 다수의 유입구(138a, 138b, 138c, 138d) 중에서 어느 하나와 연통할 수 있다. The switching unit body 410 may be provided with openings 413 and 414 through which the washing water flowing into the arm holder chamber 320 flows. When the plurality of upper gears 421, 422, 423, and 424 are engaged with the upper gear fitting portion 139, the opening holes 413 and 414 are connected to any one of the plurality of inlets 138a, 138b, 138c, and 138d, respectively. Can communicate.
복수의 상부기어(421, 422, 423, 424)는 4개로 제공될 수 있으며, 전환부본체(410)의 중심(C)을 기준으로 서로 90도 간격을 이루며 배치될 수 있다. The plurality of upper gears 421, 422, 423, and 424 may be provided as four, and may be disposed at 90 degree intervals with respect to the center C of the switching unit body 410.
또한, 복수의 상부기어(421, 422, 423, 424)는 전환부본체(410)의 중심(C)과 전환부본체(410)의 테두리부로부터 일정 간격 이격될 수 있다. 이때, 개방홀(413, 414)은 복수의 상부기어(421, 422, 423, 424) 중 서로 마주보는 두 개의 상부기어(421, 423)와 전환부본체(410)의 테두리부 사이에 각각 형성될 수 있다.In addition, the plurality of upper gears 421, 422, 423, and 424 may be spaced apart from the center C of the switching unit body 410 and the edge of the switching unit body 410 by a predetermined interval. In this case, the opening holes 413 and 414 are formed between two upper gears 421 and 423 facing each other among the plurality of upper gears 421, 422, 423 and 424, respectively, and an edge of the switching unit body 410. Can be.
복수의 상부기어(421, 422, 423, 424)는 개방홀(413, 414)과 인접 배치되는 제1 및 제3 상부기어(421, 423)와, 제1 및 제3 상부기어(421, 423) 사이에 서로 마주보며 배치되는 제2 및 제 4 상부기어(422, 424)를 포함할 수 있다.The plurality of upper gears 421, 422, 423, and 424 may include first and third upper gears 421 and 423 disposed adjacent to the opening holes 413 and 414, and first and third upper gears 421 and 423. ) May include second and fourth upper gears 422 and 424 disposed to face each other.
제2 및 제 4 상부기어(422, 424) 각각의 일측에는 다수의 유입구(138a, 138b, 138c, 138d)와 밀착되어 다수의 유입구(138a, 138b, 138c, 138d)로 세척수가 유입되는 것을 방지하기 위한 유입 방지부(422a, 424a)가 형성될 수 있다.One side of each of the second and fourth upper gears 422 and 424 is in close contact with the plurality of inlets 138a, 138b, 138c, and 138d to prevent the washing water from flowing into the plurality of inlets 138a, 138b, 138c, and 138d. Inflow preventing portions 422a and 424a may be formed.
하부기어(430)는 암 홀더 챔버(320)에 구비되는 하부기어 치합부(323)와 맞물릴 수 있다. 하부기어(430)는 4개로 제공될 수 있으며, 전환부본체(410)의 중심(C)을 기준으로 서로 90도 간격을 이루며 배치될 수 있다.The lower gear 430 may be engaged with the lower gear tooth 323 provided in the arm holder chamber 320. The lower gears 430 may be provided in four, and may be disposed at 90 degree intervals with respect to the center C of the switching unit body 410.
하부기어(430)는 각각 두 개의 경사면(433, 434)과 두 개의 경사면(433, 434)의 사이에 형성되는 정점(435)을 포함한다. 각각의 경사면(433, 434)은 전환부본체(410)의 원주 상에서 45도의 각도만큼 연장된다.The lower gear 430 includes vertices 435 formed between two inclined surfaces 433 and 434 and two inclined surfaces 433 and 434, respectively. Each of the inclined surfaces 433 and 434 extends by an angle of 45 degrees on the circumference of the switching unit body 410.
유로전환부(400)는 전환부본체(410)의 측면부에 구비되어 유로전환부(400)와 암 홀더 챔버(320)의 내주면 사이에 이물질이 끼이는 것을 방지하기 위한 돌기(432)를 더 포함할 수 있다. 돌기(432)는 다수개로 구비될 수 있다. 또한, 도시되지는 않았으나, 돌기(432)는 하부기어(430)의 측면부에도 구비될 수 있다.The flow path switching unit 400 further includes a protrusion 432 provided on the side portion of the switching unit body 410 to prevent foreign matter from being caught between the flow path switching unit 400 and the inner circumferential surface of the arm holder chamber 320. can do. A plurality of protrusions 432 may be provided. In addition, although not shown, the protrusion 432 may be provided on the side portion of the lower gear 430.
유로전환부(400)는 전환부본체(410)의 저면부에 구비되는 회전부(440)를 포함할 수 있다. 회전부(440)는 유로전환부(400)의 저면에서 유입되는 세척수에 의하여 유로전환부(400)가 회전하도록 하는 역할을 수행한다. 이에 따라, 유로전환부(400)는 별도의 구동장치 없이 수압에 의해 소정의 각도 단위로 회전하여 다수의 유입구(138a, 138b, 138c, 138d)를 선택적으로 개폐할 수 있다. 회전부(440)는 샤프트(441) 및 샤프트(441)에 구비되는 임펠러(443)를 포함할 수 있다.The flow path switching unit 400 may include a rotating unit 440 provided at the bottom of the switching unit body 410. The rotating unit 440 serves to rotate the flow path switching unit 400 by the washing water flowing from the bottom of the flow path switching unit 400. Accordingly, the flow path switching unit 400 may selectively open and close the plurality of inlets 138a, 138b, 138c, and 138d by rotating by a predetermined angle unit by hydraulic pressure without a separate driving device. The rotating part 440 may include a shaft 441 and an impeller 443 provided in the shaft 441.
도 13 은 도 4의 회전기어부의 사시도이다.FIG. 13 is a perspective view of the rotary gear part of FIG. 4. FIG.
도 13을 참조하면, 본 발명의 일 실시 예에 따른 회전기어부(500)는, 외주면을 따라 다수의 기어이(513)가 구비되는 림부(510)와, 기어 회전축(135)이 수용되는 회전축 수용부(520) 및 링크부재(600)에 삽입되어 링크부재(600)를 왕복 이동시키기 위한 편심돌기(530)를 포함할 수 있다. 다수의 기어이(513)를 제2기어부(513)라 이름할 수 있다.Referring to FIG. 13, a rotary gear unit 500 according to an embodiment of the present invention includes a rim portion 510 including a plurality of gears 513 along an outer circumferential surface thereof, and a rotation shaft accommodating portion in which the gear rotation shaft 135 is accommodated. 520 and an eccentric protrusion 530 inserted into the link member 600 to reciprocate the link member 600. A plurality of gears 513 may be referred to as a second gear part 513.
회전축 수용부(520)는 림부(510)에 구비되며, 기어 회전축(135)이 삽입될 수 있다. 회전축 수용부(520)는 회전기어부(500)의 상측(도 13에서 회전기어부의 하방)을 향하여 연장되어 형성될 수 있다.The rotary shaft accommodating part 520 may be provided at the rim 510, and the gear rotating shaft 135 may be inserted therein. The rotary shaft accommodating part 520 may extend toward the upper side of the rotary gear part 500 (below the rotary gear part in FIG. 13).
편심돌기(530)는 회전축 수용부(520)의 저면(도 12에서 회전기어부의 상측)에 구비될 수 있다. 편심돌기(530)는 회전기어부(500)의 저면으로부터 회전기어부(500)의 회전축(S) 방향으로 연장될 수 있다. 회전축(S)은 회전기어부(500)의 회전중심에 해당하며, 림부(510)의 중심에 제공될 수 있다. 다만, 도시된 것과 달리 편심돌기(530)는 림부(510)에 구비될 수 있다.The eccentric protrusion 530 may be provided on a bottom surface (upper side of the rotary gear unit in FIG. 12) of the rotation shaft receiving unit 520. The eccentric protrusion 530 may extend from the bottom of the rotary gear part 500 in the direction of the rotation axis S of the rotary gear part 500. The rotating shaft S corresponds to the center of rotation of the rotary gear 500 and may be provided at the center of the rim 510. However, unlike the illustrated eccentric protrusion 530 may be provided in the rim portion 510.
이하, 상기 유로전환부(400)가 상기 다수의 유입구(138a, 138b, 138c, 138d)를 선택적으로 개폐하는 방법에 대하여 설명한다.Hereinafter, a method of selectively opening and closing the plurality of inlets 138a, 138b, 138c, and 138d by the flow path switching unit 400 will be described.
도 14 는 유로전환부의 상부기어가 분사 암에 치합된 모습을 보여주는 도면이고, 도 15 는 유로전환부의 하부기어가 암 홀더에 치합된 모습을 보여주는 도면이다.14 is a view showing a state in which the upper gear of the flow path switching unit is engaged with the injection arm, Figure 15 is a view showing a state of the lower gear of the flow path switching unit is engaged with the arm holder.
도 14 및 도 15를 참조하면, 상기 세척수 유입구(313)를 통해 유입되는 세척수의 수압에 의해 상기 유로전환부(400)는 상측으로 이동하며, 상기 유로전환부(400)에 구비되는 복수의 상부기어(421, 422, 423, 424)는 상기 분사 암(100)의 저면에 구비되는 상부기어 치합부(139)에 치합될 수 있다. 이 때, 상기 유입관(321)으로 유입된 세척수는 상기 제1개방홀(413)을 거쳐 상기 제1메인 유로(117)로 유입될 수 있다.14 and 15, the flow path switching unit 400 moves upward by the water pressure of the washing water flowing through the washing water inlet 313, and a plurality of upper parts provided in the flow path switching unit 400. Gears 421, 422, 423, and 424 may be engaged with the upper gear fitting portion 139 provided on the bottom surface of the injection arm 100. At this time, the washing water introduced into the inflow pipe 321 may flow into the first main flow path 117 through the first opening hole 413.
이와 동시에, 상기 유입관(321)으로 유입된 세척수는 상기 제2개방홀(414)을 거쳐 상기 제2메인 유로(117)로 유입될 수 있다. 즉, 상기 개방홀(413, 414)이 상기 제1 및 제2유입구(138a, 138b)와 연통되면, 상기 유입관(321)으로 유입된 세척수는 상기 메인 유로(117, 118)로 동시에 유입될 수 있다. 이 때, 상기 제3 및 제4유입구(138c, 138d)는 상기 전환부본체(410)에 의해 폐쇄된다. 이에 따라, 상기 제1 및 제2전달유로를 통한 세척수 유입이 차단된다. 동시에, 상기 제1 및 제2보조 유로를 통한 세척수 유입도 차단된다.At the same time, the washing water introduced into the inflow pipe 321 may flow into the second main flow path 117 through the second opening hole 414. That is, when the opening holes 413 and 414 communicate with the first and second inlets 138a and 138b, the washing water introduced into the inlet pipe 321 may be simultaneously introduced into the main flow passages 117 and 118. Can be. At this time, the third and fourth inlets 138c and 138d are closed by the switching unit body 410. Accordingly, the inflow of the wash water through the first and second delivery passages is blocked. At the same time, the inflow of the wash water through the first and second auxiliary flow paths is also blocked.
한편, 상기 세척수 유입구(313)를 통한 세척수의 유입이 중단되면, 상기 유로전환부([0150] 400)의 상측으로 작용하는 힘이 제거되면서 상기 유로전환부(400)가 하강한다. 이에 따라, 상기 유로전환부(400)에 구비되는 하부기어(430)는 상기 암 홀더(300)에 구비되는 하부기어 치합부(323)에 치합된다.On the other hand, when the inflow of the wash water through the wash water inlet 313 is stopped, the flow path switching unit 400 is lowered while the force acting on the upper side of the flow path switching unit (400) is removed. Accordingly, the lower gear 430 provided in the flow path switching unit 400 is engaged with the lower gear fitting portion 323 provided in the arm holder 300.
상기 하부기어(430)가 상기 하부기어 치합부(323)에 치합되면서, 상기 유로전환부(400)는 시계방향(또는 반시계방향)으로 일정 각도 회전한다. 이때, 상기 유로전환부(400)는 대략 45도 정도 회전할 수 있다. 이는, 상기 하부기어(430)에 구비된 경사면(433)이 상기 전환부본체(410)의 원주 상에서 45도의 각도만큼을 차지하기 때문이다.As the lower gear 430 is engaged with the lower gear fitting portion 323, the flow path switching unit 400 rotates a predetermined angle in a clockwise direction (or counterclockwise direction). In this case, the flow path switching unit 400 may rotate about 45 degrees. This is because the inclined surface 433 provided on the lower gear 430 occupies an angle of 45 degrees on the circumference of the switching unit body 410.
도시되지는 않았으나, 상기 유로전환부(400)가 하강한 이후 다시 상기 세척수 유입구(313)를 통해 세척수가 유입되면, 상기 유로전환부(400)가 상승하면서 상기 복수의 상부기어(421, 422, 423, 424)가 다시 상기 상부기어 치합부(139)에 치합될 수 있다. 이 때, 상기 개방홀(413, 414)은 상기 제1 및 제2유입구(138a, 138b)가 아닌 상기 제3 및 제4유입구(138c, 138d)와 연통하게 된다. 이에 따라, 상기 유입관(321)으로 유입된 세척수는 상기 개방홀(413, 414)을 거쳐 상기 제3 및 제4유입구(138c, 138d)로 유입된다. 이 때, 상기 제1 및 제2유입구(138a,138b)는 상기 전환부본체(410)에 의해 폐쇄된다. 이에 따라, 상기 메인 유로(117, 118)를 통한 세척수 유입이 차단된다.Although not shown, when the water flows through the washing water inlet 313 again after the flow path switching unit 400 is lowered, the flow path switching unit 400 rises and the plurality of upper gears 421, 422, 423 and 424 may be engaged with the upper gear fitting 139 again. At this time, the opening holes 413 and 414 communicate with the third and fourth inlets 138c and 138d rather than the first and second inlets 138a and 138b. Accordingly, the washing water introduced into the inlet pipe 321 flows into the third and fourth inlets 138c and 138d through the opening holes 413 and 414. At this time, the first and second inlets 138a and 138b are closed by the switching unit body 410. Accordingly, the inflow of the wash water through the main flow paths 117 and 118 is blocked.
상기 섬프(90)는 상기 세척수 유입구(313)로 세척수 공급시, 세척수를 단속적으로 공급할 수 있다. 구체적으로, 상기 섬프(90)는 일정시간 동안 상기 암 홀더(300)로 세척수를 공급한 뒤, 일정시간 동안 세척수의 공급을 중단할 수 있다. 즉, 상기 섬프(90)는 세척수의 공급 및 중단을 교번하여 수행한다. 따라서, 상기 유로전환부(400)는 상승 및 하강하면서 회전함에 따라, 상기 메인 유로(117, 118)와 상기 제1 및 제2전달유로를 교번하여 개폐할 수 있다.The sump 90 may supply the washing water intermittently when the washing water is supplied to the washing water inlet 313. Specifically, the sump 90 may supply the washing water to the arm holder 300 for a predetermined time, and then stop the supply of the washing water for a predetermined time. That is, the sump 90 alternately supplies and stops the washing water. Thus, as the flow path switching unit 400 rotates up and down, the main flow paths 117 and 118 and the first and second transfer paths may be alternately opened and closed.
또한, 섬프를 통해 상기 메인 유로(117, 118)로 세척수가 공급되는 시간과 상기 제1 및 제2전달유로로 세척수가 공급되는 시간은 동일하게 설정될 수 있다.In addition, the time at which the washing water is supplied to the main flow passages 117 and 118 through the sump and the time at which the washing water is supplied to the first and second delivery passages may be set to be the same.
상기 회전기어부(500)가 회전함에 따라 상기 보조 암(140, 150)이 왕복하여 회전한다. As the rotary gear unit 500 rotates, the auxiliary arms 140 and 150 reciprocate and rotate.
도 16은 회전기어부의 회전 각도에 따른 분사 암 어셈블리의 저면을 보여주는 도면이며, 도 17는 도 16의 분사 암 어셈블리의 측면도이다.FIG. 16 is a view illustrating a bottom surface of the injection arm assembly according to the rotation angle of the rotary gear part, and FIG. 17 is a side view of the injection arm assembly of FIG. 16.
구체적으로, 도 16의 (a), (b), (c), (d)는 각각 상기 회전기어부(500)가 0도, 90도, 180도, 270도 회전한 경우의 분사 암 어셈블리(10)의 저면을 보여주는 도면이고, 도 17의 (a), (b), (c), (d)는 각각 도 17의 (a),(b), (c), (d)의 분사 암 어셈블리(10)의 측면도이다.Specifically, (a), (b), (c), and (d) of FIG. 16 respectively illustrate the injection arm assembly 10 when the rotary gear part 500 is rotated by 0 degrees, 90 degrees, 180 degrees, and 270 degrees. And (b), (b), (c) and (d) of FIG. 17 are the injection arm assemblies of (a), (b), (c) and (d) of FIG. 17, respectively. 10 is a side view.
도 16(a) 및 도 17(a)를 참조하면, 상기 회전기어부(500)가 회전하지 않은 초기 상태의 경우, 상기 편심돌기(530)는 상기 삽입부(625) 내의 일측에 위치한다. 이 때, 제1보조 암(140)은 상기 메인 암(110)과 평행하게 배치된다.Referring to FIGS. 16A and 17A, in the initial state in which the rotary gear 500 does not rotate, the eccentric protrusion 530 is located at one side of the insertion part 625. In this case, the first auxiliary arm 140 is disposed in parallel with the main arm 110.
도 16(b) 및 도 17(b)를 참조하면, 상기 회전기어부(500)가 반시계 방향으로 90도 회전한 경우, 상기 링크부재(600)는 상기 편심돌기(530)에 의해 상기 장축(612a) 방향 중 A방향을 따라 이동한다.16 (b) and 17 (b), when the rotary gear part 500 rotates 90 degrees in the counterclockwise direction, the link member 600 is formed by the eccentric protrusion 530 with the long axis ( 612a) moves along the A direction.
상기 제1보조 연장부(640)는 상기 링크부재(600)가 상기 장축(612a) 방향을 따라 이동함에 따라 상기 제1동력전달부(146)에 힘을 가한다. 이에 따라, 상기 제1보조 암(140)은 시계 방향으로 일정 각도만큼 회전한다. 상기 제1보조 암(140)의 회전각도는 대략 20도 정도이다.The first auxiliary extension part 640 applies a force to the first power transmission part 146 as the link member 600 moves along the long axis 612a. Accordingly, the first auxiliary arm 140 rotates by a predetermined angle in the clockwise direction. The rotation angle of the first auxiliary arm 140 is about 20 degrees.
도 16(c) 및 도 17(c)를 참조하면, 상기 회전기어부(500)가 반시계 방향으로 90도만큼 더 회전한 경우, 상기 링크부재(600)는 상기 장축(612a) 상의 A방향의 반대 방향인 B방향을 따라 이동한다. 이에 따라, 상기 링크부재(600)는 도 16(a) 및 도 17(a)에 도시된 것과 같은 위치로 복귀된다. 동시에 상기 제1보조 암(140)은 상기 제1보조 연장부(640)에 의해 반시계방향으로 회전하여 원 위치로 복귀된다.16 (c) and 17 (c), when the rotary gear part 500 is further rotated by 90 degrees in the counterclockwise direction, the link member 600 is in the A direction on the long axis 612a. Move along the opposite direction B. Accordingly, the link member 600 is returned to the position as shown in Figs. 16 (a) and 17 (a). At the same time, the first auxiliary arm 140 is rotated counterclockwise by the first auxiliary extension 640 to return to the original position.
도 16(d) 및 도 17(d)를 참조하면, 상기 회전기어부(500)가 반시계 방향으로 90도만큼 더 회전한 경우, 상기 링크부재(600)는 상기 편심돌기(530)에 의해 상기 장축(612a) 방향 중 B방향을 따라 이동한다. 이 때, 상기 제1보조 암(140)은 반시계 방향으로 일정 각도만큼 회전한다. 상기 제1보조 암(140)의 회전각도는 대략 20도 정도이다.Referring to FIGS. 16 (d) and 17 (d), when the rotary gear part 500 further rotates by 90 degrees in the counterclockwise direction, the link member 600 is moved by the eccentric protrusion 530. It moves along B direction among the major axis 612a directions. At this time, the first auxiliary arm 140 rotates by a predetermined angle in the counterclockwise direction. The rotation angle of the first auxiliary arm 140 is about 20 degrees.
한편, 상기 제2보조 암(150)은 상기 링크부재(600)에 상기 제1보조 암(140)과 동시에 같은 각도로 회전할 수 있다. 다만, 상기 제2보조 암(150)은 측면에서 볼 때 상기 제1보조 암(140)과 반대 방향으로 회전한다. 와 같이, 상기 링크부재(600)는 상기 회전기어부(500)의 회전에 의해, 상기 [0164] 편심돌기(530)의 상사점과 하사점 사이의 거리만큼 왕복하여 운동할 수 있다.On the other hand, the second auxiliary arm 150 may be rotated at the same angle to the link member 600 at the same time as the first auxiliary arm 140. However, when viewed from the side, the second auxiliary arm 150 rotates in the opposite direction to the first auxiliary arm 140. As described above, the link member 600 may move by reciprocating by the distance between the top dead center and the bottom dead center of the eccentric protrusion 530 by the rotation of the rotary gear unit 500.
상기 고정기어부(200)와, 상기 회전기어부(500) 및 상기 링크부재(600)는 서로 상호작용하여 상기 보조 암(140,150)을 왕복하여 회전시키는 역할을 수행하므로, 이를 통칭하여 ‘회전 구동부’라 이름할 수 있다.The fixed gear unit 200, the rotary gear unit 500 and the link member 600 to interact with each other to perform the role of reciprocating and rotating the auxiliary arms (140,150), collectively referred to as 'rotation drive unit' Can be called.
이하, 상기 분사 암(100)에서 세척수가 분사됨에 따라 상기 분사 암(100)이 정회전 또는 역회전하는 원리에 대해 설명한다.Hereinafter, the principle that the injection arm 100 is rotated forward or reverse as the washing water is injected from the injection arm 100 will be described.
도 18 는 메인 암에서 세척수가 분사되는 모습을 보여주는 도면이고, 도 19 은 보조 암에서 세척수가 분사되는 모습을 보여주는 도면이며, 도 20 은 도 18의 Ⅱ-Ⅱ`를 따라 절개한 단면도이다.FIG. 18 is a view illustrating the washing water sprayed from the main arm, FIG. 19 is a view showing the washing water spraying from the auxiliary arm, and FIG. 20 is a cross-sectional view taken along the line II-II ′ of FIG. 18.
도 18 내지 도 20을 참조하면, 본 발명의 실시 예에 따른 메인 암(110)은 복수 개의 상부 분사구를 포함한다. 구체적으로, 제1암(113)은 복수 개의 제1상부 분사구(123a, 123b, 123c, 123d)를 포함할 수 있다. 또한, 제2암(114)에도 복수 개의 제2상부 분사구(124a, 124b, 124c, 124d)를 포함할 수 있다. 유로전환부(400)에 의해 메인 유로(117, 118)가 개방되면 복수 개의 제1상부 분사구(123a, 123b, 123c, 123d)와, 복수 개의 제2상부 분사구(124a, 124b, 124c, 124d)에서 세척수가 동시에 분사될 수 있다.18 to 20, the main arm 110 according to the embodiment of the present invention includes a plurality of upper injection holes. In detail, the first arm 113 may include a plurality of first upper injection holes 123a, 123b, 123c, and 123d. In addition, the second arm 114 may include a plurality of second upper injection holes 124a, 124b, 124c, and 124d. When the main flow paths 117 and 118 are opened by the flow path switching unit 400, the plurality of first upper injection ports 123a, 123b, 123c and 123d and the plurality of second upper injection ports 124a, 124b, 124c and 124d are provided. In the wash water can be sprayed simultaneously.
복수 개의 제1상부 분사구(123a, 123b, 123c, 123d) 중에서 적어도 일부의 분사구(123a, 123b)는 분사되는 세척수의 방향이 메인 암(110)과 예각을 이루도록 편향될 수 있다.At least some of the plurality of first upper injection holes 123a, 123b, 123c, and 123d may be biased such that the direction of the washing water sprayed is acute with the main arm 110.
이에 따라, 분사 암(100)은 일부의 편향된 분사구(123a, 123b)에서 세척수가 분사됨으로써 발생하는 반발력에 의해 회전할 수 있다. 즉, 일부의 편향된 분사구(123a, 123b)에서 세척수가 분사됨으로써, 분사 암(100)에 소정의 토크값이 발생할 수 있다.Accordingly, the injection arm 100 may rotate by the repulsive force generated by spraying the washing water from some of the deflected injection holes (123a, 123b). That is, the washing water is injected from some of the deflected injection holes 123a and 123b, so that a predetermined torque value may be generated in the injection arm 100.
복수 개의 제1상부 분사구(123a, 123b, 123c, 123d) 중에서 다른 일부의 분사구(123c, 123d)는 편향되지 않은 것으로서, 세척수를 수직한 방향으로 분사할 수 있다. Among the plurality of first upper injection holes 123a, 123b, 123c, and 123d, the other injection holes 123c and 123d are not deflected, and the washing water may be sprayed in a vertical direction.
복수 개의 제2상부 분사구(124a, 124b, 124c, 124d) 중에서 적어도 일부의 분사구(124a, 124b)는 분사되는 세척수의 방향이 메인 암(110)과 예각을 이루도록 편향될 수 있다.At least some of the plurality of second upper injection holes 124a, 124b, 124c, and 124d may be deflected so that the direction of the washing water sprayed is acute with the main arm 110.
이에 따라, 분사 암(100)은 일부의 분사구(124a, 124b)에서 세척수가 분사됨으로써 발생하는 반발력에 의해 회전할 수 있다. 즉, 일부의 편향된 분사구(124a, 124b)에서 세척수가 분사됨으로써, 분사 암(100)에 소정의 토크값이 발생할 수 있다. Accordingly, the injection arm 100 may rotate by the repulsive force generated by the injection of the washing water from some of the injection holes (124a, 124b). That is, the washing water is injected from some of the deflected injection holes 124a and 124b, so that a predetermined torque value may be generated in the injection arm 100.
제1상부 분사구(123) 중에서 일부의 편향된 분사구(123a, 123b)에서 세척수가 분사됨에 따라 분사 암(100)에 작용하는 토크와, 제2상부 분사구(124) 중에서 일부의 편향된 분사구(124a, 124b)에서 세척수가 분사됨에 따라 분사 암(100)에 작용하는 토크는 서로 동일한 방향을 갖는다.Torque acting on the injection arm 100 as the washing water is sprayed from the partially deflected jets 123a and 123b among the first upper jet nozzles 123 and some of the deflected jet ports 124a and 124b of the second upper jet nozzles 124. As the washing water is injected in the), the torque acting on the injection arm 100 has the same direction as each other.
한편, 제1상부 분사구(123) 중 편향된 분사구(123a, 123b)와 제2상부 분사구(124) 중 편향된 분사구(124a, 124b)는, 분사 암(100)의 회전 궤적의 접선 방향으로 세척수를 분사하도록 편향될 수 있다. 이 경우, 세척수 분사에 의한 회전력이 더욱 커질 수 있다.Meanwhile, the jetting holes 123a and 123b deflected among the first upper injection holes 123 and the jetting holes 124a and 124b deflected among the second upper injection holes 124 spray the washing water in a tangential direction of the rotational trajectory of the injection arm 100. Can be biased to. In this case, the rotational force by the washing water injection may be further increased.
복수 개의 제1상부 분사구(124a, 124b, 124c, 124d) 중에서 다른 일부의 분사구(124c, 124d)는 편향되지 않은 것으로서, 세척수를 수직한 방향으로 분사할 수 있다. Some of the plurality of first upper injection holes 124a, 124b, 124c, and 124d are not deflected, and the washing water may be sprayed in a vertical direction.
이와 같이, 복수의 상부 분사구(123, 124)는 다양한 각도로 세척수를 분사하도록 서로 다른 각도로 편향될 수 있다. 유로전환부(400)에 의해 전달유로가 개방되는 경우에는, 복수 개의 제1상부 보조 분사구(143a, 143b, 143c, 143d)와, 복수 개의 제2상부 보조 분사구(153a, 153b, 153c, 153d)를 통해 세척수가 분사된다. As such, the plurality of upper injection holes 123 and 124 may be deflected at different angles to spray the washing water at various angles. When the delivery flow path is opened by the flow path switching unit 400, the plurality of first upper auxiliary injection holes 143a, 143b, 143c, and 143d and the plurality of second upper auxiliary injection holes 153a, 153b, 153c, and 153d are provided. The washing water is sprayed through.
제1보조 암(140)의 경우에도 메인 암(110)과 같이 적어도 일부의 편향된 분사구(143a, 143b)와 편향되지 않은 분사구(143c, 143d)가 형성될 수 있다. 제2보조 암(150)도 적어도 일부의 편향된 분사구(153a, 153b)와 편향되지 않은 분사구(153c, 153d)가 형성될 수 있다. In the case of the first auxiliary arm 140, at least some of the deflected jet holes 143a and 143b and the unbiased jet holes 143c and 143d may be formed like the main arm 110. The second auxiliary arm 150 may also have at least some deflected jets 153a and 153b and unbiased jets 153c and 153d.
제1보조 암(140)에 구비된 편향 분사구(143a, 143b)를 제1편향 분사구(143a, 143b)라 이름하고, 제2보조 암(150)에 구비된 편향된 분사구(153a, 153b)를 제2편향 분사구(153a, 153b)라 이름할 수 있다. 또한, 제1보조 암(140)에 구비된 편향되지 않은 분사구(143c, 143d)를 제1수직 분사구(143c, 143d)라 이름하고, 제2보조 암(150)에 구비된 편향되지 않은 분사구(153c, 153d)를 제2수직 분사구(153c, 153d)라 이름할 수 있다.The deflection jets 143a and 143b provided in the first sub-arm 140 are called first deflection jets 143a and 143b, and the deflected jets 153a and 153b provided in the second sub-arm 150 are called first. The two deflection jets 153a and 153b may be called. In addition, the unbiased ejection openings 143c and 143d provided in the first auxiliary arm 140 are referred to as first vertical ejection openings 143c and 143d, and the non-biased ejection openings provided in the second auxiliary arm 150 153c and 153d may be referred to as second vertical injection holes 153c and 153d.
분사 암(100)에는 제1편향 분사구(143a, 143b)에서 세척수가 분사됨으로써 발생하는 토크가 작용할 수 있다. 또한, 분사 암(100)에는 제2 편향 분사구(153a, 153b)에서 세척수가 분사됨으로써 발생하는 토크가 작용할 수 있다.Torque generated by spraying the washing water from the first deflection injection holes 143a and 143b may act on the injection arm 100. In addition, a torque generated by spraying the washing water from the second deflection jet holes 153a and 153b may act on the injection arm 100.
한편, 제1보조 암(140) 및 제2보조 암(150)의 경우 서로 동일한 방향으로 회전하므로, 세척수 분사에 의한 토크의 크기와 방향이 바뀔 수 있다. On the other hand, since the first auxiliary arm 140 and the second auxiliary arm 150 rotate in the same direction with each other, the magnitude and direction of the torque by the washing water injection may be changed.
이하, 메인 암(110)의 편향된 분사구(123a, 123b, 124a, 124b)에서의 세척수 분사방향에 대해 설명한다. 편의상 편향된 분사구를 제1상부 분사구(123) 및 제2상부 분사구(124)라 이름한다. 제1상부 분사구(123) 및 제2상부 분사구(124)에서 세척수가 분사되는 원리는 동일하므로, 먼저 제2상부 분사구(124)를 기준으로 설명한다.Hereinafter, the washing water jetting directions at the deflected jetting ports 123a, 123b, 124a, and 124b of the main arm 110 will be described. For convenience, the deflected jets are referred to as the first upper jet 123 and the second upper jet 124. Since the washing water is sprayed from the first upper injection hole 123 and the second upper injection hole 124, the same principle will be described with reference to the second upper injection hole 124.
도 20의 경우, 제2암(114)의 제2상부 분사구(124)에서 분사되는 세척수의 분사방향을 보여준다.20, the spraying direction of the washing water sprayed from the second upper injection hole 124 of the second arm 114 is shown.
제2암(114)에는 상부 프레임(120)과 하부 프레임(130) 사이에 형성되는 제2메인 유로(118)가 형성된다. 암 홀더(300)를 통해 유입된 세척수는 제2메인 유로(118)로 유동된 후, 제2상부 분사구(124)를 통해 외부로 분사될 수 있다. A second main flow passage 118 is formed between the upper frame 120 and the lower frame 130 in the second arm 114. The washing water introduced through the arm holder 300 may flow into the second main flow path 118 and then be sprayed to the outside through the second upper injection hole 124.
제2상부 분사구(124)는 도면을 기준으로 좌측 상부를 향하도록 편향될 수 있다. 이에 따라, 제2상부 분사구(124)에서 분사되는 세척수의 방향(A1)도 도면을 기준으로 좌측 상부를 향할 수 있다.The second upper injection hole 124 may be biased to face the upper left side with reference to the drawings. Accordingly, the direction A1 of the washing water sprayed from the second upper injection hole 124 may also face the upper left side with reference to the drawings.
즉, 제2상부 분사구(124)에서의 세척수 분사방향(A1)은 도시된 것과 같이 분사 암(100)의 회전축(V)과 예각을 이루도록 편향된다. 이에 따라, 분사 암(100)은 제2상부 분사구(124)를 통해 세척수가 분사됨으로 발생하는 토크에 의해 회전할 수 있다. That is, the washing water injection direction A1 at the second upper injection hole 124 is deflected to form an acute angle with the rotation axis V of the injection arm 100 as shown. Accordingly, the injection arm 100 may rotate by the torque generated by the injection of the washing water through the second upper injection port 124.
또한, 제1암(113)에 구비되는 제1상부 분사구(123)도 제2상부 분사구(124)와 같이 편향될 수 있다. 이에 따라, 분사 암(100)에는 제1상부 분사구(123) 및 제2상부 분사구(124)에서 세척수가 분사됨으로 발생하는 토크가 동시에 작용하게 된다.In addition, the first upper injection hole 123 provided in the first arm 113 may also be deflected like the second upper injection hole 124. Accordingly, the torque generated by the injection of the washing water from the first upper injection port 123 and the second upper injection port 124 acts on the injection arm 100 simultaneously.
세척수가 복수의 분사구를 통해 분사되므로, 분사 암(100)에는 복수의 토크가 작용한다. 따라서, 분사 암(100)은 제1상부 분사구(123) 및 제2상부 분사구(124)에서 분사되는 세척수에 의한 토크의 합력에 따라 회전 방향이 바뀔 수 있다. 다만, 제1상부 분사구(123)에서 분사되는 세척수에 의한 토크와 제2상부 분사구(124)에서 분사되는 세척수에 의한 토크의 방향이 동일한 경우에는, 분사 암(100)의 회전력이 더욱 강해질 수 있다.Since the washing water is injected through the plurality of injection holes, a plurality of torques act on the injection arm 100. Therefore, the rotation direction of the injection arm 100 may be changed according to the torque of the washing water injected from the first upper injection port 123 and the second upper injection port 124. However, when the torque by the washing water injected from the first upper injection hole 123 and the torque by the washing water injected from the second upper injection hole 124 are the same, the rotational force of the injection arm 100 may be stronger. .
도 21은 보조 암에서 세척수가 분사되는 동시에 왕복 회전하는 모습을 보여주는 도면이다. 이하, 제1보조 암(140)의 왕복 회전 시의 세척수의 분사방향의 변화에 대해 설명한다.21 is a view showing that the washing water is sprayed and reciprocated at the same time in the auxiliary arm. Hereinafter, the change of the injection direction of the wash water at the time of reciprocating rotation of the 1st auxiliary arm 140 is demonstrated.
도 21(a)의 경우 제1보조 암(140)이 회전하지 않은 모습을 보여주며, 도 21(b)의 경우 제1보조 암(140)이 시계방향으로 최대한 회전한 모습을 보여주는 도면이며, 도 21(c)의 경우 제1보조 암(140)이 반시계방향으로 최대한 회전한 모습을 보여주는 도면이다.In the case of FIG. 21 (a), the first auxiliary arm 140 is not rotated. In the case of FIG. 21 (b), the first auxiliary arm 140 is rotated clockwise as much as possible. In the case of FIG. 21C, the first auxiliary arm 140 rotates in the counterclockwise direction as much as possible.
도 21(a)을 참조하면, 제1상부 보조 분사구(143) 및 제1하부 보조 분사구(144)에서는 동시에 세척수가 분사된다. 제1상부 보조 분사구(143)에서의 세척수 분사방향(A2) 및 제1하부 보조 분사구(144)에서의 세척수 분사방향(A3)은 도면을 기준으로 우측 상방을 향할 수 있다. Referring to FIG. 21A, the washing water is simultaneously sprayed from the first upper auxiliary spray hole 143 and the first lower auxiliary spray hole 144. The washing water spraying direction A2 at the first upper auxiliary spraying hole 143 and the washing water spraying direction A3 at the first lower auxiliary spraying hole 144 may face the upper right side with reference to the drawings.
또한, 제1상부 보조 분사구(143) 및 제1하부 보조 분사구(144)에서 분사되는 세척수의 분사방향(A2, A3)은 분사 암(100)의 회전축(V)과 예각을 이룰 수 있다. 이에 따라, 제1상부 보조 분사구(143) 및 제1하부 보조 분사구(144)에서 분사되는 세척수에 의해, 분사 암(100)에는 시계방향의 토크가 가해질 수 있다.In addition, the spraying directions A2 and A3 of the washing water sprayed from the first upper auxiliary spray hole 143 and the first lower auxiliary spray hole 144 may form an acute angle with the rotation axis V of the spray arm 100. Accordingly, clockwise torque may be applied to the injection arm 100 by the washing water sprayed from the first upper auxiliary injection hole 143 and the first lower auxiliary injection hole 144.
도 21(b)을 참조하면, 제1보조 암(140)이 시계방향으로 최대한 회전한 경우에도, 제1상부 보조 분사구(143) 및 제1하부 보조 분사구(144)에서 분사되는 세척수의 분사방향(A2, A3)은 분사 암(100)의 회전축(V)을 기준으로 우측을 향하도록 분사될 수 있다. 따라서, 제1보조 암(140)이 시계방향으로 회전한 경우에도, 분사 암(100)에는 시계방향의 토크가 가해질 수 있다.Referring to FIG. 21B, the spraying direction of the washing water sprayed from the first upper auxiliary spray hole 143 and the first lower auxiliary spray hole 144 even when the first auxiliary arm 140 rotates clockwise as much as possible. A2 and A3 may be sprayed to the right based on the rotation axis V of the injection arm 100. Therefore, even when the first auxiliary arm 140 is rotated in the clockwise direction, the clockwise torque may be applied to the injection arm 100.
도 21(c)을 참조하면, 제1보조 암(140)이 반시계방향으로 최대한 회전한 경우에도, 제1상부 보조 분사구(143) 및 제1하부 보조 분사구(144)에서 분사되는 세척수의 분사방향(A2, A3)은 분사 암(100)의 회전축(V)을 기준으로 오른쪽을 향하도록 분사될 수 있다. 따라서, 제1보조 암(140)이 반시계방향으로 회전한 경우에도, 분사 암(100)에는 시계방향의 토크가 가해질 수 있다.Referring to FIG. 21 (c), even when the first auxiliary arm 140 is rotated as far as possible in the counterclockwise direction, the injection of the washing water sprayed from the first upper auxiliary injection hole 143 and the first lower auxiliary injection hole 144 is performed. The directions A2 and A3 may be sprayed to the right with respect to the rotation axis V of the injection arm 100. Therefore, even when the first auxiliary arm 140 rotates counterclockwise, the clockwise torque may be applied to the injection arm 100.
다만, 제1상부 보조 분사구(143)에서 분사되는 세척수의 분사방향(A2)은 분사 암(100)의 회전축(V)과 거의 평행할 수 있다. 이 경우, 분사 암(100)에 작용하는 토크의 방향이 바뀔 수 있어 문제된다. However, the injection direction A2 of the washing water sprayed from the first upper auxiliary injection hole 143 may be substantially parallel to the rotation axis V of the injection arm 100. In this case, the direction of the torque acting on the injection arm 100 may be changed, which is a problem.
따라서, 제1보조 암(140)의 회전 각도는, 제1상부 보조 분사구(143)의 분사각보다 작아야 한다. 제1상부 보조 분사구(143)의 분사각이란, 제1보조 암(140)이 회전 하지 않은 상태에서의 제1상부 보조 분사구(143)에서의 세척수 분사방향(A2)과 분사 암(100)의 회전축(V)이 이루는 각도를 의미한다.Therefore, the rotation angle of the first auxiliary arm 140 should be smaller than the injection angle of the first upper auxiliary injection hole 143. The spray angle of the first upper auxiliary spray port 143 is the washing water spray direction A2 and the spray arm 100 at the first upper auxiliary spray hole 143 when the first auxiliary arm 140 is not rotated. Means the angle formed by the rotation axis (V).
또한, 제1보조 암(140)의 회전 각도는, 제1하부 보조 분사구(144)의 분사각보다 작아야 한다. 제1하부 보조 분사구(144)의 분사각이란, 제1보조 암(140)이 회전 하지 않은 상태에서의 제1하부 보조 분사구(144)에서의 세척수 분사방향(A3)과 분사 암(100)의 회전축(V)이 이루는 각도를 의미한다.In addition, the rotation angle of the first auxiliary arm 140 should be smaller than the injection angle of the first lower auxiliary injection hole 144. The injection angle of the first lower auxiliary injection hole 144 means that the washing water injection direction A3 and the injection arm 100 at the first lower auxiliary injection hole 144 are not rotated. Means the angle formed by the rotation axis (V).
제2보조 암(150)의 경우에도, 제1보조 암(140)과 동일하게 작동될 수 있으므로 구체적인 설명은 생략한다.In the case of the second auxiliary arm 150, since the same operation as the first auxiliary arm 140 may be omitted.
이하, 제1보조 암(140)과 제2보조 암(150) 회전시의 수직 분사구에 의한 영향에 대해 설명한다.Hereinafter, the influence of the vertical injection hole during the rotation of the first auxiliary arm 140 and the second auxiliary arm 150 will be described.
제1수직 분사구(143c, 143d)에서 세척수가 분사되더라도, 분사 암(100)의 회전에는 거의 영향을 미치지 않는다. 다만, 제1보조 암(140)이 회전하면, 제1수직 분사구(143c, 143d)에서 분사되는 세척수의 분사방향은 분사 암(100)과 예각을 이루기 때문에, 세척수 분사에 의해 분사 암(100)에 토크가 작용할 수 있다.Even if the washing water is injected from the first vertical injection holes 143c and 143d, the rotation of the injection arm 100 has little effect. However, when the first auxiliary arm 140 rotates, since the spray direction of the washing water sprayed from the first vertical spray holes 143c and 143d forms an acute angle with the spraying arm 100, the spraying arm 100 is sprayed by the washing water. Torque may act.
다만, 제1보조 암(140) 회전 시 제2보조 암(150)도 동일 각도로 회전하기 때문에, 제1수직 분사구(143c, 143d)에서 분사되는 세척수와 제2수직 분사구(153c, 153d)에서 분사되는 세척수의 방향은 동일 각도를 이룰 수 있다. 따라서, 제1보조 암(140)과 제2보조 암(140)이 회전하더라도, 제1수직 분사구(143c, 143d)에서 분사되는 세척수에 의한 토크값과 제2수직 분사구(153c, 153d)에서 분사되는 세척수에 의한 토크값은 서로 상쇄된다.However, since the second auxiliary arm 150 also rotates at the same angle when the first auxiliary arm 140 rotates, the washing water sprayed from the first vertical injection holes 143c and 143d and the second vertical injection holes 153c and 153d respectively. The direction of the sprayed washing water may be at the same angle. Therefore, even if the first auxiliary arm 140 and the second auxiliary arm 140 rotate, the torque value of the washing water sprayed from the first vertical injection holes 143c and 143d and the second vertical injection holes 153c and 153d are injected. The torque values due to the washing water being canceled out.
더 나아가, 제1보조 암(140)과 제2보조 암(140)은 동시에 동일 각도로 회전하므로, 제1수직 분사구(143c, 143d)에서 분사되는 세척수와 제2수직 분사구(153c, 153d)에서 분사되는 세척수가 서로 평행한 경우에는 토크값이 서로 상쇄될 수 있다. 즉, 제1수직 분사구(143c, 143d)에서 분사되는 세척수와 제2수직 분사구(153c, 153d)에서 분사되는 세척수가 수직한 방향을 갖지 않더라도 서로 평행하면 분사 암(100)에 작용하는 토크값이 상쇄될 수 있다.Furthermore, since the first auxiliary arm 140 and the second auxiliary arm 140 rotate at the same angle at the same time, the washing water and the second vertical injection holes 153c and 153d sprayed from the first vertical injection holes 143c and 143d are rotated at the same time. When the sprayed washing water is parallel to each other, the torque values may cancel each other. That is, even if the washing water sprayed from the first vertical spraying holes 143c and 143d and the washing water sprayed from the second vertical spraying holes 153c and 153d are not parallel to each other, the torque value acting on the spraying arm 100 is equal to each other. Can be offset.
또한, 제1보조 암(140)과 제2보조 암(140)이 회전하는 경우, 세척수의 분사 각도가 낮아지므로 세척수의 최대 분사 높이도 낮아질 수 있다.In addition, when the first auxiliary arm 140 and the second auxiliary arm 140 rotate, since the spray angle of the washing water is lowered, the maximum spray height of the washing water may also be lowered.
따라서, 메인 분사구(123, 124)에서 세척수가 분사되는 경우에는 분사 암(100)이 반시계방향으로 회전하고, 보조 분사구(143, 153)에서 세척수가 분사되는 경우에는 분사 암(100)이 시계방향으로 회전할 수 있다.Therefore, when the washing water is injected from the main injection holes 123 and 124, the injection arm 100 rotates counterclockwise, and when the washing water is injected from the auxiliary injection holes 143 and 153, the injection arm 100 is clockwise. Direction can be rotated.
이상에서는 본 발명의 바람직한 실시예에 대하여 도시하고 설명하였지만, 본 발명은 상술한 특정의 실시예에 한정되지 아니하며, 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 다양한 변형실시가 가능한 것은 물론이고, 이러한 변형실시들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어서는 안될 것이다.Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.
[부호의 설명][Description of the code]
11: 케이스 12: 터브11: case 12: tub
12a: 세척실 12b: 바닥12a: washroom 12b: floor
12c: 연통홀 13: 로우분사암12c: communication hole 13: low sandstone
14: 어퍼분사암 15: 탑분사 암14: upper sandblasting 15: top spraying rock
22: 급수밸브 23: 급수유로22: water supply valve 23: water supply passage
24: 배수유로 25: 배수펌프24: drainage channel 25: drainage pump
26: 필터 27: 플로우미터26: filter 27: flow meter
100: 섬프 130: 전환밸브 100: sump 130: switching valve
150: 세척펌프 151: 히터150: washing pump 151: heater
152: 하우징 1541: 세척수유입관152: housing 1541: washing water inlet pipe
1545: 스팀배출관 1549: 세척수유출관1545: steam discharge pipe 1549: wash water discharge pipe
155: 임펠러 157: 세척모터155: impeller 157: cleaning motor
190: 스팀호스 195: 스팀노즐190: steam hose 195: steam nozzle

Claims (18)

  1. 세척대상이 수용되는 공간이 형성되는 터브;A tub is formed in which a space to be cleaned is formed;
    상기 터브의 내부에 수용되어 상기 세척대상으로 세척수를 분사하는 메인 암 및 상기 메인 암에 대하여 소정각도 이격되어 상기 세척대상으로 세척수를 회동 분사하는 보조 암을 포함하는 분사 암; A spraying arm including a main arm accommodated in the tub and spraying the washing water to the washing object while being spaced at a predetermined angle with respect to the main arm to spray the washing water to the washing object;
    세척수를 상기 분사 암으로 공급하는 세척모터;A washing motor for supplying washing water to the spray arm;
    상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 전류감지부;A current sensing unit sensing a current of the cleaning motor while the injection arm is rotating;
    상기 세척모터를 제어하여 세척수가 상기 분사 암으로 공급되도록 하고, 상기 분사 암이 회전하는 동안 상기 전류감지부에 의해 감지되는 전류의 변화에 대응하여 상기 분사 암의 회전방향을 감지하는 제어부;를 포함하는 식기 세척기. A control unit for controlling the washing motor to supply washing water to the injection arm, and detecting a rotational direction of the injection arm in response to a change in current detected by the current sensing unit while the injection arm is rotated. Dishwasher.
  2. 제 1 항에 있어서, The method of claim 1,
    상기 제어부는 회전방향이 감지되면, 동작 모드에 따라, 제 1 방향 회전과 제 2 방향 회전에 대한 회전 비율을 상이하게 설정하여, 상기 분사 암의 회전방향을 제어하는 것을 특징으로 하는 식기 세척기. The control unit, when the rotation direction is detected, according to the operation mode, by setting the rotation ratio for the first direction rotation and the second direction rotation differently, the dish washing machine, characterized in that for controlling the rotation direction of the injection arm.
  3. 제 1 항에 있어서, The method of claim 1,
    상기 제어부는 상기 분사 암의 회전방향을 감지 후, 세척수를 추가 급수하고 동작모드에 따라 상기 분사 암의 회전방향을 제어하는 것을 특징으로 하는 식기 세척기. The control unit detects the rotational direction of the injection arm, the water is further supplied to the washing water dishwasher, characterized in that for controlling the rotational direction of the injection arm in accordance with the operation mode.
  4. 제 1 항에 있어서, The method of claim 1,
    상기 제어부는 예비세척 전, 상기 터브에 세척수를 급수 한 후 상기 세척모터를 기동하여 상기 분사 암의 회전방향을 감지하는 것을 특징으로 하는 식기 세척기. The control unit is a dishwasher, characterized in that for detecting the rotational direction of the injection arm by starting the washing motor after the water supply to the tub before the pre-wash.
  5. 제 4 항에 있어서, The method of claim 4, wherein
    상기 제어부는 예비세척 시 급수되는 급수량의 60 내지 80 %의 세척수를 급수 한 후 상시 분사 암의 회전방향을 감지하는 것을 특징으로 하는 식기 세척기. The control unit is a dishwasher, characterized in that for detecting the rotational direction of the spray arm at all times after the water supply 60 to 80% of the amount of water supplied during pre-washing.
  6. 제 1 항에 있어서, The method of claim 1,
    상기 제어부는 상기 세척모터의 회전속도를 단계적으로 증가시켜 전류변화를 감지하는 것을 특징으로 하는 식기 세척기. The control unit dishwasher, characterized in that for detecting the current change by increasing the rotational speed of the washing motor in stages.
  7. 제 1 항에 있어서, The method of claim 1,
    상기 제어부는 상기 분사 암이 회전하는 동안 감지되는 전류의 최대값과 최소값의 차이를 전류차로 연산하고, 상기 전류차가 설정전류 이상이면 상기 분사 암의 회전방향을 판단하는 것을 특징으로 하는 식기 세척기. And the controller calculates a difference between a maximum value and a minimum value of a current detected while the injection arm is rotated as a current difference, and determines a rotation direction of the injection arm when the current difference is greater than or equal to a set current.
  8. 제 7 항에 있어서, The method of claim 7, wherein
    상기 제어부는 상기 세척모터가 제 1 속도로 동작하는 동안 전류차가 발생하면, 상기 제 1 속도와 동일한 속도로 상기 세척모터를 다시 동작시켜 전류의 변화에 따라 상기 분사 암의 회전방향을 판단하는 것을 특징으로 하는 식기 세척기. If the current difference occurs while the washing motor is operating at the first speed, the control unit again operates the washing motor at the same speed as the first speed to determine the rotational direction of the injection arm in accordance with the change of current Dishwasher.
  9. 제 7 항에 있어서, The method of claim 7, wherein
    상기 제어부는 상기 분사 암이 재회전하는 동안 전류변화가 없는 경우 상기 분사 암이 반시계방향으로 회전한 것으로 판단하고, 상기 분사 암이 재회전하는 동안 전류변화가 있는 경우, 상기 분사 암이 시계방향으로 회전한 것으로 판단하는 것을 특징으로 하는 식기 세척기. The controller determines that the injection arm is rotated counterclockwise when there is no current change while the injection arm is rotated again, and when there is a current change while the injection arm is rerotated, the injection arm rotates clockwise. Dishwasher, characterized in that judged as one.
  10. 제 7 항에 있어서, The method of claim 7, wherein
    상기 제어부는 제 1 속도에서 상기 전류차가 발생하지 않으면, 제 2 속도로 속도를 증가시키는 것을 특징으로 하는 식기 세척기. And if the current difference does not occur at the first speed, the controller increases the speed at the second speed.
  11. 제 1 항에 있어서, The method of claim 1,
    상기 터브의 저면에 장착되어 세척수가 저수되며, 상기 분사 암으로 세척수를 공급하는 섬프;를 더 포함하고, It is mounted to the bottom of the tub, the wash water is stored, the sump for supplying the washing water to the injection arm;
    상기 세척모터는 상기 섬프에 저수된 세척수를 상기 분사 암으로 공급하고, The washing motor supplies the washing water stored in the sump to the injection arm,
    상기 제어부는, 상기 메인 암 및 상기 보조 암 중 어느 하나로 부터 분사되는 세척수에 의해 결정되는 회전방향을, 상기 분사 암이 회전하는 동안 상기 전류감지부에 의해 감지되는 전류의 변화에 대응하여 감지하는 것을 특지으로 하는 식기 세척기. The controller detects a rotational direction determined by the washing water sprayed from one of the main arm and the auxiliary arm in response to a change in current sensed by the current sensing unit while the spraying arm rotates. Dishwasher specialty.
  12. 예비 세척 전, 세척수를 급수하는 단계;Watering the washing water before preliminary washing;
    세척모터를 동작시켜 섬프에 저수된 세척수를 분사 암으로 공급하는 단계;Supplying the washing water stored in the sump to the injection arm by operating the washing motor;
    상기 분사 암이, 공급되는 세척수를 분사하면서, 어느 일방향으로 회전하는 단계; The injection arm rotating in one direction while spraying the supplied washing water;
    상기 분사 암이 회전하는 동안, 상기 세척모터의 전류를 감지하는 단계;Sensing the current of the cleaning motor while the injection arm is rotating;
    상기 분사 암이 회전하는 동안의 전류변화에 대응하여, 상기 분사 암의 회전방향을 감지하는 단계;Detecting a rotational direction of the injection arm in response to a change in current while the injection arm rotates;
    세척수를 추가 급수하는 단계; 및Further watering the washing water; And
    상기 분사 암의 회전방향을 제어하며 상기 예비 세척을 수행하는 단계를 포함하는 식기 세척기의 제어방법. And controlling the rotational direction of the jetting arm and performing the preliminary washing.
  13. 제 12 항에 있어서, The method of claim 12,
    상기 세척모터에 전류변화가 없는 경우, 상기 세척모터의 회전속도를 증가하여 상기 분사 암으로 공급되는 세척수의 양을 증가시키는 단계; 및If there is no current change in the washing motor, increasing the rotational speed of the washing motor to increase the amount of washing water supplied to the injection arm; And
    공급되는 상기 세척수에 의해 상기 분사 암이 회전하며 세척수를 분사하는 단계;를 더 포함하는 식기 세척기의 제어방법. The spraying arm is rotated by the washing water supplied and spraying the washing water; Control method of the dishwasher further comprising.
  14. 제 12 항에 있어서, The method of claim 12,
    상기 세척모터에 전류변화가 있는 경우 정지된 상기 세척모터를 동일한 속도로 동작시켜 상기 분사 암을 다시 회전시키는 단계; 및Rotating the injection arm again by operating the stopped washing motor at the same speed when there is a current change in the washing motor; And
    상기 분사 암이 회전하는 동안 전류를 감지하는 단계;를 더 포함하는 식기 세척기의 제어방법. And sensing a current while the jetting arm rotates.
  15. 제 14 항에 있어서, The method of claim 14,
    상기 분사 암이 재회전하는 동안 전류변화가 없는 경우 상기 분사 암이 다음 동작 시, 반시계방향으로 회전할 것으로 판단하는 단계; 및Determining that the injection arm rotates in a counterclockwise direction in the next operation when there is no current change while the injection arm is re-rotating; And
    상기 분사 암이 재회전하는 동안 전류변화가 있는 경우, 상기 분사 암이 다음 동작 시 시계방향으로 회전할 것으로 판단하는 단계;를 더 포함하는 식기 세척기의 제어방법. And determining that the injection arm rotates in a clockwise direction during the next operation when there is a current change while the jetting arm rotates again.
  16. 제 12 항에 있어서, The method of claim 12,
    감지되는 전류의 최대값과 최소값의 전류차가 설정전류 이상이면, 전류변화가 있는 것으로 판단하는 단계를 더 포함하는 식기 세척기의 제어방법. And determining that there is a current change when the difference between the maximum value and the minimum value of the detected current is greater than or equal to the set current.
  17. 제 12 항에 있어서, The method of claim 12,
    회전방향 감지를 위한 회전속도를 결정하는 단계; Determining a rotational speed for detecting the rotational direction;
    상기 회전속도로 세척모터를 동작시켜 세척수를 상기 분사 암으로 공급하는 단계를 더 포함하는 식기 세척기의 제어방법. And operating the washing motor at the rotational speed to supply the washing water to the spray arm.
  18. 제 17 항에 있어서, The method of claim 17,
    상기 회전속도를 결정하는 단계는, Determining the rotation speed,
    세척모터의 회전속도를 소정 단위로 단계적으로 증가시키는 단계;Stepwise increasing the rotational speed of the washing motor in a predetermined unit;
    상기 세척모터에 의해 상기 분사 암으로 공급되는 세척수가 분사되며, 상기 분사 암이 회전하는 단계;Washing water supplied to the spray arm by the washing motor, and rotating the spray arm;
    상기 분사 암이 회전하는 동안 상기 세척모터의 전류를 감지하는 단계;Sensing current of the cleaning motor while the injection arm is rotating;
    전류변화가 있는 경우 상기 회전속도를 회전방향을 감지하기 위한 회전속도로 결정하는 단계;를 더 포함하는 식기 세척기의 제어방법. And determining the rotation speed as a rotation speed for detecting a rotation direction when there is a current change.
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