WO2011138878A1 - 洗濯機 - Google Patents
洗濯機 Download PDFInfo
- Publication number
- WO2011138878A1 WO2011138878A1 PCT/JP2011/052701 JP2011052701W WO2011138878A1 WO 2011138878 A1 WO2011138878 A1 WO 2011138878A1 JP 2011052701 W JP2011052701 W JP 2011052701W WO 2011138878 A1 WO2011138878 A1 WO 2011138878A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laundry
- damper
- weight
- damping force
- washing machine
- Prior art date
Links
- 238000005406 washing Methods 0.000 title claims abstract description 86
- 238000001514 detection method Methods 0.000 claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 124
- 238000013016 damping Methods 0.000 claims abstract description 109
- 239000000725 suspension Substances 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims description 50
- 239000004744 fabric Substances 0.000 claims description 36
- 230000008859 change Effects 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 24
- 230000005291 magnetic effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 description 47
- 230000008569 process Effects 0.000 description 47
- 230000018044 dehydration Effects 0.000 description 30
- 238000006297 dehydration reaction Methods 0.000 description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010981 drying operation Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 239000003599 detergent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/48—Preventing or reducing imbalance or noise
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/18—Condition of the laundry, e.g. nature or weight
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
- D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/26—Casings; Tubs
- D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
- D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
Definitions
- the embodiment of the present invention relates to a washing machine.
- the water tank is located inside the outer box, and the drum is located inside the water tank.
- the drum is driven to rotate by a motor outside the water tank.
- the water tank is elastically supported by a suspension on the bottom plate of the outer box.
- the suspension is provided with a damper that attenuates the vibration of the water tank accompanying the vibration of the drum.
- a damper having a constant damping force is usually used.
- a damper having a variable damping force a configuration using a functional fluid as a working fluid is considered.
- a functional fluid is a fluid whose rheological properties such as viscosity are functionally changed by controlling physical quantities applied from the outside.
- the functional fluid includes a magnetorheological fluid and an electrorheological fluid which are fluids whose viscosity changes when electric energy is applied.
- the magnetorheological fluid is, for example, one in which ferromagnetic particles such as iron and carbonyl iron are dispersed in oil.
- the electrorheological fluid increases in viscosity when an electric field is applied (see, for example, Patent Documents 1 to 4).
- the damper using the functional fluid described above can change the damping force by changing the viscosity of the functional fluid. For example, in a drum-type washing machine, the damping force of the damper is increased until the rotational speed at which the resonance of the water tank appears at the start of the dewatering process. As a result, the occurrence of resonance in the water tank is avoided, and the rising performance of the drum rotation in the dehydration process is improved. When the subsequent dehydration stroke is steady (drum is rotating at high speed), the damping force of the damper is reduced. Thereby, it is possible to avoid the vibration of the water tank from being transmitted to the outer box, and further to prevent the vibration from being transmitted to the floor surface of the house where the washing machine is installed.
- a drum-type washing machine an unbalance due to a shift of the laundry when the drum rotates is detected, and the drum is provided on the condition that the size of the unbalance is equal to or less than a predetermined size.
- the rotation speed is increased step by step.
- the weight of the laundry is detected at the beginning of the washing process to determine the washing water level and set the washing time.
- the weight of the laundry is detected at the beginning of the drying process, and the drying time is set.
- a first object is to provide a washing machine that can preferably control the damping force of a damper having a variable damping force when performing predetermined detection when the drum rotates.
- the rotation speed of the drum is increased stepwise on condition that the detected imbalance magnitudes are not more than a predetermined magnitude, thereby reducing the occurrence of vibrations. You can proceed with restraint.
- the unbalance during the rotation of the drum also varies depending on the amount (weight) of the laundry. Conventionally, there has been no response to the fact that the imbalance during rotation of the drum changes depending on the weight of the laundry.
- a second object is to provide a washing machine capable of controlling the damping force of the damper according to the weight of the laundry.
- the washing machine of the present embodiment includes an outer box, a water tub, a rotating tub, a suspension, and control means.
- the water tank is located inside the outer box.
- the rotating tank is positioned inside the water tank and is driven to rotate.
- the suspension has a damper that attenuates the vibration of the water tank and can change the damping force, and elastically supports the water tank inside the outer box.
- the control means controls to keep the damping force of the damper constant during a predetermined detection operation.
- the washing machine includes an outer box, a water tub, a rotating tub, a laundry weight detection unit, a suspension, and a control unit.
- the water tank is located inside the outer box.
- the rotating tank is positioned inside the water tank and is driven to rotate.
- the laundry weight detecting means detects the weight of the laundry present inside the rotating tub.
- the suspension has a damper that attenuates the vibration of the water tank and can change the damping force, and elastically supports the water tank inside the outer box.
- the control means performs control to increase the damping force of the damper as the detected weight of the laundry is smaller in accordance with the detection result of the laundry weight detection means.
- the time chart which shows 1st Embodiment and is the control content of a dehydration process Longitudinal side view of the washing machine as a whole Longitudinal cross section of suspension unit Electrical configuration block diagram
- the time chart which shows 2nd Embodiment and is the control content of the whole process FIG.
- FIG. 5 equivalent diagram showing the third embodiment
- the figure which shows the concrete relationship between the detected laundry weight and the damping force of a damper at the time of a washing operation, a rinse operation, and a drying operation The figure which shows the linear relationship between the detected laundry weight and the damping force of a damper
- dehydration operation The figure which shows 4th Embodiment and shows the stepwise relationship between the detected laundry weight and the damping force of a damper.
- FIG. 2 shows an overall structure of, for example, a drum type washing machine (washing and drying machine).
- the washing machine uses the outer box 1 as an outer shell.
- the laundry doorway 2 is formed at a substantially central portion of the front surface portion (right side in FIG. 2) of the outer box 1.
- a door 3 that opens and closes the laundry doorway 2 is pivotally supported by the outer box 1.
- the operation panel 4 is provided on the upper portion of the front surface portion of the outer box 1.
- the control device 5 for operation control is provided on the back side of the operation panel 4 (inside the outer box 1).
- the water tank 6 is disposed inside the outer box 1.
- the aquarium 6 has a horizontal-axis cylindrical shape whose axial direction extends substantially in the front-rear direction (substantially right-left direction in FIG. 2).
- the water tank 6 is elastically supported on the bottom plate 1a of the outer box 1 in a state where it is inclined forward and upward by a pair of left and right suspensions 7 (only one is shown in FIG. 2). The detailed structure of the suspension 7 will be described later.
- the motor 8 is attached to the back of the water tank 6.
- the motor 8 is a DC brushless motor, for example.
- the motor 8 is an outer rotor type, and a rotating shaft (not shown) attached to the center portion of the rotor 8 a is inserted through the bearing housing 9 into the water tank 6.
- the drum 10 is disposed inside the water tank 6.
- This drum 10 also has a horizontal cylindrical shape whose axial direction extends substantially in the front-rear direction.
- the drum 10 is attached at the center of the rear part thereof to the tip of the rotating shaft of the motor 8. Thereby, the drum 10 is supported concentrically with the water tank 6 and inclined forward.
- the drum 10 is rotated by the motor 8. Therefore, the drum 10 is a rotating tank, and the motor 8 functions as a drum driving device that rotates the drum 10.
- a large number of small holes 11 are formed in the circumferential side portion (body portion) of the drum 10 over the entire area.
- the drum 10 has an opening 12 on the front surface thereof, and the water tank 6 has an opening 13 on the front surface thereof.
- the opening 13 of the water tub 6 and the laundry entrance / exit 2 are connected by an annular bellows 14. As a result, the laundry entrance / exit 2 is connected to the inside of the drum 10 via the bellows 14, the opening 13 of the water tub 6, and the opening 12 of the drum 10.
- the drain pipe 16 is connected to the rear part of the bottom, which is the lowest part of the water tank 6, via a drain valve 15. Further, the drying unit 17 is arranged from the back of the water tank 6 to the upper side and the front side.
- the drying unit 17 includes a dehumidifier 18, a blower 19, and a heater 20. The drying unit 17 dehumidifies the air in the water tub 6 and then heats it to dry the laundry present in the drum 10 by circulating it back into the water tub 6.
- vibration sensors 21 and 22 are respectively attached to the front part and the rear part of the upper part of the water tank 6. These vibration sensors 21 and 22 are both acceleration sensors, for example.
- the vibration sensors 21 and 22 detect the vibration.
- the vibration sensors 21 and 22 function as unbalance detection means for detecting unbalance during rotation of the drum 10 by vibration of the water tank 6.
- the suspension 7 has a damper 23.
- the damper 23 includes a cylinder 24 made of a magnetic material and a shaft 25 made of the same magnetic material as main members.
- the cylinder 24 has a connecting member 26 at the upper end.
- the connecting member 26 is passed through a mounting plate 27 included in the water tank 6 from the lower side to the upper side, and is fastened by a nut 29 via an elastic seat plate 28 and the like. Thereby, the cylinder 24 is attached to the water tank 6.
- the shaft 25 has a connecting portion 25a at the lower end.
- the connecting portion 25 a is passed from the upper side to the lower side through the mounting plate 30 included in the bottom plate 1 a of the outer box 1, and is fastened by the nut 32 via the elastic seat plate 31 and the like. . Thereby, the shaft 25 is attached to the bottom plate 1 a of the outer box 1.
- the upper yoke 33 is press-fitted and fixed to an intermediate portion inside the cylinder 24.
- the upper yoke 33 is made of a magnetic material and is formed in a short cylindrical shape having a space 34 above the inner peripheral portion.
- the ring-shaped upper bearing 35 is housed and fixed (held) in the space 34.
- the upper bearing 35 is made of, for example, sintered oil-impregnated metal.
- the upper coil 36 is inserted and fixed (held) inside the cylinder 24 at a position directly below the upper yoke 33 while being wound around the upper bobbin 37.
- the ring-shaped intermediate yoke 38 is press-fitted and fixed at a position directly below the upper bobbin 37 inside the cylinder 24.
- the intermediate yoke 38 is made of a magnetic material.
- the lower coil 39 is inserted and fixed (held) in a state of being wound around the lower bobbin 40 at a position directly below the intermediate yoke 38 inside the cylinder 24.
- the ring-shaped lower yoke 41, the lip-shaped seal 42, and the ring-shaped lower bearing 43 are positioned immediately below the lower bobbin 40 inside the cylinder 24 and on the inner peripheral portion of the short cylindrical bracket 44. It is inserted and fixed (held) in the stored state.
- the lower yoke 41 and the bracket 44 are made of a magnetic material
- the lower bearing 43 is made of, for example, a sintered oil-impregnated metal.
- seal 45 is provided between the upper yoke 33 and the upper bobbin 37.
- the seal 46 is provided between the upper bobbin 37 and the intermediate yoke 38.
- the seal 47 is provided between the intermediate yoke 38 and the lower bobbin 40.
- the seal 48 is provided between the lower bobbin 40 and the lower yoke 41.
- the shaft 25 passes through the lower bearing opening 43, the seal 42, the lower yoke 41, the lower bobbin 40, the intermediate yoke 38, the upper bobbin 37, the upper yoke 33, and the upper bearing 35 in this order from the lower end opening 49 of the cylinder 24.
- MR fluid magnetic viscous fluid 52
- the functional fluid is a fluid whose rheological properties such as viscosity are functionally changed by controlling a physical quantity applied from the outside.
- This functional fluid includes a magnetorheological fluid 52 that is a fluid whose viscosity changes when electric energy is applied, and an electrorheological fluid (not shown).
- a magnetic viscous fluid 52 whose viscosity characteristics change according to the strength of a magnetic field (magnetic field) is used as the functional fluid.
- an electrorheological fluid ER fluid
- ER fluid whose viscosity characteristics change according to the strength of the electric field (electric field) may be used as the functional fluid.
- the magnetorheological fluid 52 is obtained by dispersing ferromagnetic particles such as iron and carbonyl iron in oil.
- the magnetorheological fluid 52 when a magnetic field is applied, the ferromagnetic particles form a chain-like cluster, thereby increasing the viscosity.
- the seal 42 and the seals 45 to 48 have a function of suppressing leakage of the magnetorheological fluid 52.
- the damper 23 is configured as described above.
- a spring seat 53 is fitted and fixed to the lower part of the shaft 25 located below the outside of the cylinder 24.
- a coil spring 54 which is a compression coil spring surrounding the shaft 25, is mounted between the spring receiving seat 53 and the lower end portion of the cylinder 24.
- the suspension 7 is configured in this way. The suspension 7 is incorporated between the water tank 6 and the bottom plate 1 a of the outer box 1, thereby elastically supporting the water tank 6 on the bottom plate 1 a of the outer box 1.
- the upper and lower coils 36 and 39 of the damper 23 are connected to a drive circuit (not shown) outside the damper 23 through lead wires (not shown).
- the coils 36 and 39 are energized by the drive circuit.
- FIG. 4 is a block diagram showing an electrical configuration centering on the control device 5.
- the control device 5 is composed of a microcomputer, for example, and functions as a control means for controlling the overall operation of the drum type washing machine as will be described later.
- Various operation signals are input to the control device 5 from an operation input unit 55 including various operation switches of the operation panel 4.
- the control device 5 receives a water level detection signal from a water level sensor 56 that detects the water level in the water tank 6, and receives a rotation detection signal from a rotation sensor 57 that detects the rotation of the motor 8, and vibration sensors 21 and 22. Vibration detection signal (unbalance detection signal) is input.
- the control device 5 performs an operation of dividing the number of rotations of the motor 8 and hence the number of rotations of the drum 10 by the time required for detection (time required for detecting the number of rotations) based on the rotation detection signal from the rotation sensor 57. To do. As a result, the control device 5 also functions as a rotation speed detection unit that detects the rotation speed of the drum 10.
- the control device 5 gives a drive control signal to the drive circuit 59 based on various inputs, detection results, and a control program stored in advance.
- the drive circuit 59 includes a water supply valve 58 for supplying water into the aquarium 6, a motor 8, a drain valve 15, a motor 19b (see FIG. 2) for driving a blower blade 19a (see FIG. 2) of the blower 19 in the drying unit 17, and a drying unit. 17, the heater 20 a (see the same figure) of the heater 20 and the upper coil 36 and the lower coil 39 of the damper 23 are driven.
- the control device 5 serving as the control unit performs the operation in the order of the washing process, the dewatering process, the rinsing process, the dehydrating process, and the drying process. (See FIG. 5).
- FIG. 1 shows the operation content in the dehydration process.
- the drum 10 is rotated and its rotational speed is increased stepwise as indicated by the symbol R, and water remaining in the laundry is spun off and discharged by centrifugal force.
- the water tank 6 vibrates mainly in the vertical direction as the drum 10 rotates.
- the cylinder 24 attached to the water tank 6 includes an upper yoke 33 and an upper bearing 35, an upper bobbin 37 and an upper coil 36, an intermediate yoke 38, a lower bobbin 40 and a lower coil. 39, the bracket 44, the lower yoke 41, the seal 42, and the lower bearing 43 are vibrated in the vertical direction around the shaft 25 while the coil spring 54 is expanded and contracted.
- the control device 5 applies predetermined values to the upper and lower coils 36 and 39 of the damper 23.
- a current having a value for example, 1 [A] is applied.
- the viscosity of the magnetorheological fluid 52 where the magnetic flux passes is increased.
- the viscosity of the magnetorheological fluid 52 increases between the shaft 25 having a high magnetic flux density and the upper yoke 33, between the intermediate yoke 38 and the shaft 25, and between the lower yoke 41 and the shaft 25. Resistance increases.
- the frictional resistance when the cylinder 24 vibrates in the vertical direction with the above-described parts increases. . Therefore, as shown by “damping force: large” on the left side in FIG. 1, the damping force of the damper 23 increases. Thereby, the damping force of the damper 23 is increased at the start of the dehydration process in which the resonance of the water tank 6 appears (until the rotation of the drum 10 reaches, for example, 400 [rpm]), and the occurrence of resonance of the water tank 6 is avoided. The rising performance of 10 rotations is improved.
- the rotation unbalance of the drum 10 is detected based on the vibration detection signals of the vibration sensors 21 and 22. That is, the control device 5 increases the rotation speed of the drum 10 to the next stage when the unbalance detection result is not more than a predetermined value at each stage where the rotation speed of the drum 10 is increased. Thereby, the control apparatus 5 raises the rotational speed of the drum 10 in steps, grasping
- the control device 5 When detecting the rotation imbalance of the drum 10, the control device 5 keeps the damping force of the damper 23 constant while keeping it large. That is, while detecting the imbalance, the control device 5 keeps the upper and lower coils 36 and 39 of the damper 23 unchanged with the current of 1 [A] being applied as described above.
- the control device 5 stops detecting the unbalance of the rotation of the drum 10 and the rotation speed of the drum 10 is set to 400 [rpm] for a predetermined time T. keep.
- the control device 5 reduces the energization to the upper and lower coils 36 and 39 of the damper 23 and finally cuts off the power.
- the control device 5 reduces the damping force of the damper 23 as shown in FIG. 1 from “damping force change” to “damping force: small”.
- the control device 5 reduces (changes) the damping force of the damper 23 by gradually reducing the energization to the coils 36 and 39 over a predetermined time of, for example, about 15 [seconds]. Do with a gradient.
- the control device 5 controls the rotation speed of the drum 10 as shown in the next “unbalance detection” in FIG. 1, that is, the second “unbalance detection” from the left in FIG. Detection of the unbalance for detecting the rotation of the drum 10 based on the vibration detection signals of the vibration sensors 21 and 22.
- the control device 5 increases the rotation speed of the drum 10 to the next stage (for example, 950 [rpm]).
- the control device 5 changes the rotational speed of the drum 10 to the above-described 950 [950 [] as shown in the next “unbalance detection” in FIG. 1, that is, the third “unbalance detection” from the left in FIG. rpm] is further detected (detection of rotation imbalance of the drum 10 based on vibration detection signals from the vibration sensors 21 and 22). And when the detection result is below a predetermined value, the control apparatus 5 raises the rotational speed of the drum 10 to the last stage (for example, 1200 [rpm]).
- the control device 5 continuously rotates the drum 10 at the final rotation speed for a predetermined time. During this period (from when the rotational speed of the drum 10 is increased from the above 400 [rpm] to when the drum 10 is rotated for a predetermined time by the rotational speed of the final stage), the control device 5 reduces the damping force of the damper 23. To keep. In the meantime, the vibration of the water tank 6 is small but occurs as it is. Therefore, it is necessary to avoid the vibration from being transmitted to the outer box 1 and further to be transmitted to the floor surface of the house where the washing machine is installed. Therefore, at this time, the control device 5 reduces the damping force of the damper 23 and prevents the vibration from being transmitted by the elasticity of the coil spring 54 of the suspension 7.
- the control device 5 stops the rotational driving of the drum 10 and reduces the rotational speed to zero. In this way, when the rotational speed of the drum 10 is reduced to 0, the rotational speed passes through a speed range where resonance of the water tank 6 appears. Therefore, the control device 5 supplies a current of 1 [A] again to the upper and lower coils 36 and 39 of the damper 23. Thereby, the control device 5 increases the damping force of the damper 23 as shown by the next “damping force: large” in FIG. 1, that is, “damping force: large” shown on the right side of FIG. The occurrence of resonance is avoided.
- the control device 5 applies the damping force of the damper 23 increased at the end of the dehydration process to the upper and lower coils 36 and 39 after the rotational speed of the drum 10 passes through the speed region where the resonance of the water tank 6 appears. Decrease the current by reducing the current and turning it off.
- the suspension 7 that elastically supports the water tank 6 in which the rotationally driven drum 10 is located inside the outer box 1 attenuates the vibration of the water tank 6.
- a damper 23 is provided.
- the damper 23 can change the damping force.
- the control device 5 keeps the damping force of the damper 23 constant.
- the detection of unbalance by the unbalance detection means is performed while the drum 10 is rotating.
- the damping force of the damper 23 changes during the rotation of the drum 10
- the vibration suppressing force of the water tank 6 is changed, and the water tank 6 is likely to generate vibration. Therefore, the imbalance cannot be detected accurately.
- the control device 5 keeps the damping force of the damper 23 constant during the unbalance detection operation. Therefore, the vibration suppressing force of the water tank 6 does not change, and the water tank 6 is less likely to generate vibration. As a result, the imbalance can be accurately detected, and the control based on the unbalance can be accurately performed.
- the damping force of the damper 23 having a variable damping force is preferably controlled so as not to adversely affect the unbalance detection. Can do.
- the control for changing the damping force of the damper 23 is as follows: This is performed in a situation where the rotation speed of the drum 10 is constant. Immediately thereafter, unbalance detection is performed by the unbalance detection means (see “unbalance detection” in the middle of the three “unbalance detection” shown in FIG. 1).
- the control for changing the damping force of the damper 23 is performed in a situation where the rotational speed of the drum 10 is constant. That is, the damping force of the damper 23 is changed in a situation where the rotation speed of the drum 10 does not change. Therefore, vibration is less likely to occur in the water tank 6. Therefore, it becomes possible to accurately detect imbalance immediately thereafter (immediately after changing the damping force of the damper 23), and it is also possible to accurately perform control based on the unbalance detection.
- the damping force of the damper 23 having a variable damping force can be preferably controlled so as not to adversely affect the detection of the imbalance.
- control for changing the damping force of the damper 23 (control for changing the “damping force” as shown in FIG. 1) is performed with a predetermined change gradient.
- control for changing the damping force of the damper 23 is performed with a predetermined change gradient so as to avoid a sudden change in the damping force of the damper 23. Therefore, no abnormal vibration occurs in the water tank 6. Therefore, the imbalance detection immediately after the detection can be performed more accurately without being affected by the aftermath of abnormal vibration. Therefore, the control based on the detection of the imbalance can be executed more accurately.
- the damper 23 included in the suspension 7 includes upper bearings 35 and lower bearings 43 at the upper and lower ends of the components provided in the cylinder 24, and between these upper bearings 35 and the lower bearings 43, The remaining parts (upper yoke 33, upper coil 36 and upper bobbin 37, intermediate yoke 38, lower coil 39 and lower bobbin 40, lower yoke 41, seal 42, etc.) are provided. That is, in the cylinder 24, the shaft 25 can be supported by the upper bearing 35 and the lower bearing 43 at both upper and lower ends. Therefore, when the shaft 25 reciprocates relatively in the axial direction, the shaft 25 is less likely to shake, and the interval between the shaft 25 and the coils 36 and 39 is less likely to fluctuate. Thereby, the magnetic field generated from the coils 36 and 39 acts on the magnetorheological fluid 52 evenly, and the damping force of the damper 23 can be changed with higher accuracy.
- FIG. 5 shows the second embodiment
- FIGS. 6 to 9 show the third embodiment
- FIG. 10 shows the fourth embodiment
- FIG. 11 shows the fifth embodiment. Show.
- the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.
- FIG. 5 shows the contents of control in the second embodiment.
- the control device 5 serving as the control unit performs the washing process, the dehydration process, the rinsing process, the dehydration process, and the drying process in this order. Run the operation.
- the control device 5 first detects the weight of the laundry contained in the drum 10 (the amount of laundry in terms of weight, not the capacity of the laundry) (the weight of the laundry). Detection operation).
- the laundry contained in the drum 10 is a dry cloth (dry laundry) before being washed. Therefore, this weight detection operation is a dry cloth weight detection operation, and the washing machine of this embodiment has a dry cloth weight detection function.
- the dry cloth weight detection operation includes, for example, the time required to rotate the drum 10 to reach a predetermined rotation speed, and then the rotation speed of the drum 10 by stopping the driving of the drum 10 and rotating the drum 10 by inertia.
- the weight of the laundry is detected by the rotational load of the motor 8 from the time required for the machine to descend to a predetermined rotational speed. Therefore, in this dry cloth weight detection operation, the rotation sensor 57 and the control device 5 function as laundry weight detection means.
- the control device 5 supplies a current of 1 [A] to the upper and lower coils 36 and 39 of the damper 23 and continues the energized state. As a result, the control device 5 keeps the damping force of the damper 23 constant and maximum.
- control device 5 opens the water supply valve 58 and performs a water supply operation for supplying water into the water tank 6 to the water level corresponding to the detected laundry weight.
- the detergent set in a detergent case (not shown) is supplied together with the water supply.
- the control device 5 causes the detected laundry weight (dry cloth weight) to be a washing operation in which the laundry 10 is mainly “swattered” by alternately rotating the drum 10 in both forward and reverse directions at a low speed. Perform according to the length of time. Even during the washing operation, the water tank 6 vibrates mainly in the vertical direction as the drum 10 rotates. Therefore, the suspension 7 has the same movements and functions as those in the above dehydration process. However, the rotation of the drum 10 during this washing operation is low speed. Therefore, the movement of each part is smaller than the movement of each part during the dehydration process.
- the control device 5 energizes the upper and lower coils 36 and 39 of the damper 23 with a current (for example, 0.5 [A]) smaller than the current (1 [A]) during the dehydration process. To do. Thereby, the control apparatus 5 moderately increases the viscosity of the magnetorheological fluid 52, moderately increases the damping force of the damper 23, and suppresses vibration of the water tank 6 at this time.
- a current for example, 0.5 [A]
- the control device 5 performs a draining operation of draining the water tank 6 by opening the drain valve 15.
- the control device 5 stops energization (disconnection) to the upper and lower coils 36 and 39 of the damper 23. Therefore, at this time, the viscosity of the magnetorheological fluid 52 is not increased by the magnetic force. Thereby, the damping force of the damper 23 is returned to the magnitude obtained by the natural viscosity of the magnetorheological fluid 52.
- the operation in the subsequent dehydration process is as described in the first embodiment. However, the dehydration process is performed for a length of time corresponding to the detected laundry weight (dry cloth weight).
- the control device 5 first opens the water supply valve 58 to perform a water supply operation of supplying water into the water tank 6 to the water level corresponding to the detected laundry weight (dry cloth weight). . Subsequently, the control device 5 performs a rinsing operation for mainly “tapping and rinsing” the laundry by alternately rotating the drum 10 in both forward and reverse directions at a low speed in accordance with the detected laundry weight (dry cloth weight). In the length of time. Thereafter, the control device 5 performs a draining operation for draining from the water tank 6 by opening the drain valve 15. In this rinsing process, the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 in the same manner as the above-described washing process.
- the operation in the subsequent dehydration process is as described in the first embodiment. However, the dehydration process is performed for a length of time corresponding to the detected laundry weight (dry cloth weight).
- the control device 5 performs a drying process. Also in this drying process, the control device 5 first performs a weight detection operation for detecting the weight of the laundry present in the drum 10 (laundry weight). At this time, since the laundry present in the drum 10 is in the state after the washing process, the rinsing process, and the dehydrating process, it is a compress (a wet laundry). Therefore, this weight detection operation is a compress weight detection operation, and the washing machine of this embodiment further has a compress weight detection function.
- the compress weight detection operation is performed in the same manner as the dry weight detection operation described above. And also at the time of the detection of the laundry weight by the compress weight detection function, the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 with the same current of 1 [A] as the current in the dry weight detection operation, The energized state is continued. As a result, the control device 5 keeps the damping force of the damper 23 constant and maximum.
- control device 5 performs a drying operation for drying the laundry by causing the drying unit 17 to function while rotating the drum 10 for a length of time corresponding to the detected laundry weight (composition weight). At this time, the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 in the same manner as in the washing operation in the washing process and the rinsing operation in the rinsing process.
- the washing machine has a dry cloth weight detection function for detecting the weight of the laundry present in the drum 10 when the laundry is a dry cloth.
- the damping force of the damper 23 is kept constant.
- the suppression force of the vibration of the water tank 6 by the damper 23 does not change, and the water tank 6 does not easily generate vibration. Accordingly, since the drum 10 can be rotated stably, the laundry weight (dry cloth weight) can be accurately detected by the dry cloth weight detection function, and the control based on the detection of the laundry weight can also be accurately performed. Become.
- the damping force of the damper 23 having a variable damping force is not adversely affected to the detection of the weight of the laundry. It can be preferably controlled.
- the washing machine has a compress weight detection function for detecting the weight when the laundry present in the drum 10 is a compress.
- the damping force of the damper 23 is kept constant when the laundry weight is detected by the compress weight detection function. Therefore, even when detecting the weight of the compress, the vibration suppressing force of the water tank 6 by the damper 23 does not change, and the water tank 6 is less likely to generate vibration. Therefore, since the drum 10 can be rotated stably, the laundry weight (packing weight) can be accurately detected by the compress weight detection function, and the control based on the detection of the laundry weight can be accurately performed. Become.
- the damping force of the damper 23 having a variable damping force is not adversely affected to the detection of the weight of the laundry. It can be preferably controlled.
- the damping force of the damper 23 is made constant and maximum at the time of the above-described two kinds of laundry weight detection operations (dry cloth laundry weight detection and wet cloth laundry weight detection). ing.
- the laundry when detecting the laundry weight of the dry cloth, the laundry is not limited to the dry cloth, and a compress (for example, a bath towel containing a lot of water) may be added to the dry cloth.
- a compress for example, a bath towel containing a lot of water
- the laundry when detecting the weight of the laundry, the laundry is not limited to a dehydrated compress.
- a non-dehydrated compress a compress containing a lot of water
- May be added in addition to the dehydrated compress (a compress that does not contain a lot of water).
- the damping force of the damper 23 is constant and maximized at any of the two types of laundry weight detection (dry cloth laundry weight detection and poultry laundry weight detection). I am doing so. Therefore, when detecting the weight of the laundry, the vibration of the water tank 6 caused by the unbalance can be effectively suppressed. Thereby, the drum 10 can be rotated more stably, and the weight of the laundry can be detected more accurately. Therefore, also according to this embodiment, the control based on the detection of the laundry weight can be performed more accurately.
- FIG. 6 shows the contents of control in the third embodiment.
- the control device 5 serving as the control unit performs the washing process, the dehydration process, the rinsing process, the dehydration process, and the drying process in this order. Run the operation.
- the control device 5 first performs a weight detection operation (particularly, a dry cloth weight detection operation).
- a weight detection operation particularly, a dry cloth weight detection operation.
- the water tank 6 vibrates mainly in the vertical direction as the drum 10 rotates.
- the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 with a predetermined value (in this case, 1 [A]) and continues the energized state.
- a predetermined value in this case, 1 [A]
- the viscosity of the magnetorheological fluid 52 is between the shaft 25 having a high magnetic flux density and the upper yoke 33, between the intermediate yoke 38 and the shaft 25, and between the lower yoke 41 and the shaft 25, respectively. Increases and increases frictional resistance.
- the control device 5 performs a water supply operation and then performs a washing operation. Even during this washing operation, the water tank 6 vibrates mainly in the vertical direction as the drum 10 rotates, and thus the suspension 7 has the same movements and functions as the dry cloth weight detection operation in each part. Therefore, also at this time, the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 to increase the viscosity of the magnetorheological fluid 52 and appropriately increase the damping force of the damper 23. Suppresses vibration.
- FIG. 7 representatively shows energization current values of the upper and lower coils 36 and 39 of the damper 23 during the washing operation and the subsequent rinsing operation and drying operation.
- the energization current value is a value corresponding to the detected laundry weight. That is, if the detected laundry weight is at a “high” level, the control device 5 sets the energization current value of both the coils 36 and 39 to 0.3 [A]. If the detected laundry weight is a “medium” level, the control device 5 sets the energization current value of both the coils 36 and 39 to 0.4 [A]. If the detected laundry weight is at the “low” level, the control device 5 sets the energization current value of both the coils 36 and 39 to 0.5 [A].
- the control device 5 increases the energization current value of both the coils 36 and 39.
- the damping force of the damper 23 is proportional to the energization current value of both the coils 36 and 39. In short, the control device 5 increases the damping force of the damper 23 as the detected laundry weight is smaller.
- FIG. 8 shows the relationship between the detected laundry weight and the damping force of the damper 23 during the washing operation and the subsequent rinsing operation and drying operation.
- the control device 5 actually changes the damping force of the damper 23 linearly as shown in FIG. 8 in accordance with the detected laundry weight. Thereby, the response accuracy of the change of the damping force is improved.
- the control device 5 performs a draining operation.
- the control device 5 stops energization (disconnection) to the upper and lower coils 36 and 39 of the damper 23. Therefore, at this time, the viscosity of the magnetorheological fluid 52 is not increased by the magnetic force. Thereby, the damping force of the damper 23 is returned to the magnitude obtained by the natural viscosity of the magnetorheological fluid 52.
- the operation in the subsequent dehydration process (in this case, the intermediate dehydration process) is as shown in detail in FIG.
- the dehydration operation in this dehydration process is performed for a length of time corresponding to the detected laundry weight.
- the water tank 6 vibrates mainly in the vertical direction as the drum 10 rotates.
- the controller 5 energizes the upper and lower coils 36 and 39 of the damper 23 with a larger current value than during the washing operation.
- the control apparatus 5 increases the viscosity of the magnetorheological fluid 52, increases the damping force of the damper 23, and suppresses the vibration of the water tank 6.
- FIG. 9 representatively shows energization current values of the upper and lower coils 36 and 39 of the damper 23 during the dehydrating operation.
- the energization current value in this case is also a value corresponding to the detected laundry weight. That is, if the detected laundry weight is at a “high” level, the control device 5 sets the energization current value of both the coils 36 and 39 to 0.5 [A]. If the detected laundry weight is a “medium” level, the control device 5 sets the energization current value of both the coils 36 and 39 to 0.8 [A]. If the detected laundry weight is at the “low” level, the control device 5 sets the energization current value of the coils 36 and 39 to 1.0 [A]. That is, also in this case, the control device 5 increases the energization current value of the coils 36 and 39 as the detected laundry weight is small. The smaller the detected laundry weight is, the damper 23 is. The damping force is increased.
- control device 5 actually changes the damping force of the damper 23 linearly as shown in FIG. 8 according to the detected laundry weight. Thereby, the response accuracy of the change of the damping force is improved.
- FIG. 1 represents the state which energized 1 [A] as an electric current value according to the detected laundry weight as an example.
- the damping force of the damper 23 is increased at the start of the dehydration process in which the resonance of the water tank 6 appears (until the rotation of the drum 10 reaches, for example, 400 [rpm]) to avoid the resonance of the water tank 6, and the drum The rising performance of 10 rotations is improved.
- control device 5 increases the rotational speed of the drum 10 stepwise while more reliably grasping the state where the unbalance of the rotation of the drum 10 is small at each stage.
- the control device 5 When detecting the unbalance of the rotation of the drum 10, the control device 5 causes the upper and lower coils 36 and 39 of the damper 23 to have current values (in one example, 1 according to the detected laundry weight). The current of [A]) remains unchanged and remains unchanged. Thereby, the control apparatus 5 makes the damping force of the damper 23 constant while keeping it large.
- the control device 5 thereafter stops the rotational driving of the drum 10 and lowers the rotational speed to 0, that is, when the rotational speed of the drum 10 passes through the speed range where the resonance of the water tank 6 appears, the damper 23 A current having a current value (in the example, 1 [A]) corresponding to the detected laundry weight is supplied to the upper and lower coils 36 and 39 again.
- the control device 5 increases the damping force of the damper 23 as shown by “damping force: large” in FIG. 1, thereby avoiding the resonance of the water tank 6.
- the control device 5 performs a rinsing process. Even in this rinsing process, the control device 5 first performs a weight detection operation for detecting the weight of the laundry present in the drum 10. At this time, the laundry present in the drum 10 is a poultice because it is in a state after the washing process and the dehydrating process. Therefore, this weight detection operation is a compress weight detection operation.
- the compress weight detection operation is performed in the same manner as the dry weight detection operation described above.
- the control device 5 applies the same current value (for example, 1) to the upper and lower coils 36 and 39 of the damper 23 as the dry weight detection operation by the dry weight detection function. [A]) is energized and the energized state is continued.
- the control device 5 opens the water supply valve 58 to perform a water supply operation for supplying water into the aquarium 6 to the water level corresponding to the detected laundry weight (wet pack weight). Subsequently, the control device 5 performs a rinsing operation for mainly “tapping and rinsing” the laundry by alternately rotating the drum 10 in both forward and reverse directions at a low speed in accordance with the detected laundry weight (packing weight). In the length of time. In this rinsing process, the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 in the same manner as the washing process. However, energization of the coils 36 and 39 at that time is performed according to the contents shown in FIG. 7 and FIG.
- control device 5 performs a draining operation of draining from the water tank 6 by opening the drain valve 15. In this drainage operation, the control device 5 stops energization of the upper and lower coils 36 and 39 of the damper 23.
- the operation in the subsequent dehydration process is the same as the above dehydration process (intermediate dehydration process).
- the energization of the coils 36 and 39 at that time is performed according to the contents shown in FIGS. 9 and 1 according to the current value corresponding to the detection result of the compress weight detection operation.
- control device 5 performs a drying process. Also in this drying process, the control device 5 first performs a weight detection operation (particularly, a compress weight detection operation). Even during the compressing weight detection operation, the control device 5 energizes the upper and lower coils 36 and 39 of the damper 23 with the same current value (for example, 1 [A]) as that during the dry weight detection operation. The energized state is continued.
- a weight detection operation particularly, a compress weight detection operation.
- control device 5 performs a drying operation for drying the laundry by causing the drying unit 17 to function while rotating the drum 10 for a length of time corresponding to the detected laundry weight (composition weight). At this time, the control device 5 energizes both the upper and lower coils 36 and 39 of the damper 23 according to the contents shown in FIGS. 7 and 1 according to the current value according to the detection result of the above-described compress weight detection operation. .
- the suspension 7 that elastically supports the water tank 6 in which the rotationally driven drum 10 is located inside the outer box 1 attenuates the vibration of the water tank 6.
- a damper 23 is provided.
- the damper 23 can change the damping force.
- the damping force of the damper 23 is made large so that the detected laundry weight is small.
- the damping force of the damper 23 is increased as the detected laundry weight is smaller.
- vibration transmitted from the drum 10 to the water tank 6 can be effectively suppressed.
- the subsequent washing operation, dehydrating operation, rinsing operation, dehydrating operation, and drying operation can be advanced while reducing vibrations according to the detected laundry weight. Therefore, the user can comfortably use the washing machine.
- the control device 5 performs the laundry weight detection operation by the laundry weight detection means when the laundry present in the drum 10 is a dry cloth. ing.
- the fact that the laundry is a dry cloth is a state before the laundry is washed. Therefore, according to the washing machine of this embodiment, the weight of the laundry can be detected at the first stage before the laundry is washed. As a result, the damping force of the damper 23 can be controlled from the start of the laundry operation in accordance with the weight detection result of the laundry. Therefore, the above-described operational effects can be obtained quickly.
- the control device 5 may perform the operation of detecting the laundry weight by the laundry weight detection means when the laundry present in the drum 10 is a compress. ing.
- the laundry has different water absorption depending on the quality of the cloth. For this reason, laundry with high water absorption has a higher weight in the compress than laundry with low water absorption. Therefore, laundry with high water absorption tends to be an unbalanced load when the drum 10 is rotated.
- the control device 5 is configured to perform the laundry weight detection operation when the laundry present in the drum 10 is a compress. Therefore, the weight of the laundry having different water absorption depending on the cloth quality can be detected with higher accuracy.
- the damping force of the damper 23 that is subsequently performed (after the laundry weight is detected) according to the laundry weight detection result can also be accurately controlled, and the above-described effects can be obtained more reliably. it can.
- the laundry weight detection detection of the laundry weight of the compress
- the laundry weight of the compress may be performed only at the beginning of the rinsing process. That is, the laundry weight of the compress may not be detected at the beginning of the drying process.
- FIG. 10 relates to the fourth embodiment, and shows the relationship between the detected laundry weight and the damping force of the damper 23. That is, in this case, the change in the damping force of the damper 23 corresponding to the detected laundry weight is not the linear change shown in FIG. In the present embodiment, the change in the damping force of the damper 23 in response to the detected amount of the laundry weight, as shown in FIG. The damping force of the damper 23 is changed step by step to small, medium and large levels. According to the present embodiment, data (stored data) stored in the control device 5 can be simplified, and the cost can be reduced.
- FIG. 11 shows a suspension 61 in the fifth embodiment.
- the damper 62 has one coil 63 that is not divided into upper and lower portions and wound around one bobbin 64.
- the damper 62 arranges the coil 63 and the bobbin 64 between the upper yoke 33 and the lower yoke 41 (bracket 44) in the cylinder 24, and holds them fixedly. Therefore, the suspension 61 (damper 62) of this embodiment does not have the intermediate yoke 38 described above. Even with such a configuration, the damping force of the damper 62 can be changed and can be kept constant by controlling the energization of the coil 63 by the control device 5.
- the washing machine described above is not limited to the above-described embodiment, and can be implemented with appropriate modifications within a range not departing from the gist.
- the imbalance detection means is not limited to the vibration sensors 21 and 22 described above, and the control device 5 detects the imbalance by calculating the q-axis current of the current flowing through the motor 8. You may do.
- the motor 8 that rotates the drum 10 is a brushless DC motor.
- the brushless DC motor includes a rotor 8a having a permanent magnet and a stator 8b having a coil (see FIG. 2).
- the current flowing in the motor 8 is perpendicular to the d-axis current that is parallel to the magnetic flux generated by the S and N poles of the stator coil (rotation direction) by performing general vector control.
- q-axis current is perpendicular to the d-axis current that is parallel to the magnetic flux generated by the S and N poles of the stator coil (rotation direction) by performing general vector control.
- q-axis current is perpendicular to the d-axis current that is parallel to the magnetic flux generated by the S and N poles of the stator coil (rotation direction) by performing general vector control.
- q-axis current is perpendicular to the d-axis current that is parallel to the magnetic flux generated by the S and N poles of the stator coil (rot
- control device 5 can function as an unbalance detection unit that replaces the vibration sensors 21 and 22 described above by calculating the variation in the q-axis current value during one rotation of the motor 8.
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Abstract
Description
しかしながら、ドラムの回転時におけるアンバランスは、洗濯物の量(重量)によっても変わる。従来では、ドラムの回転時におけるアンバランスが洗濯物の重量によって変わるということに対し、対応がされていなかった。
水槽は、外箱の内部に位置する。回転槽は、水槽の内部に位置して回転駆動される。サスペンションは、水槽の振動を減衰するものであって減衰力を変化させることが可能なダンパを有し、水槽を外箱の内部で弾性支持する。制御手段は、所定の検知動作中は、ダンパの減衰力を一定に保つ制御をする。
水槽は、外箱の内部に位置する。回転槽は、水槽の内部に位置して回転駆動される。洗濯物重量検知手段は、回転槽の内部に存在する洗濯物の重量を検知する。サスペンションは、水槽の振動を減衰するものであって減衰力を変化させることが可能なダンパを有し、水槽を外箱の内部で弾性支持する。制御手段は、洗濯物重量検知手段の検知結果に応じ、検知された洗濯物の重量が少ないほどダンパの減衰力を大きくする制御をする。
[第1の実施形態]
以下、第1の実施形態につき、図1から図4を参照して説明する。
まず、図2には、例えばドラム式の洗濯機(洗濯乾燥機)の全体構造を示している。洗濯機は、外箱1を外殻としている。洗濯物出入口2は、この外箱1の前面部(図2で右側)のほぼ中央部に形成されている。この洗濯物出入口2を開閉する扉3は、外箱1に枢支されている。操作パネル4は、外箱1の前面部の上部に設けられている。運転制御用の制御装置5は、操作パネル4の裏側(外箱1内)に設けられている。
そのほか、制御装置5には、水槽6内の水位を検知する水位センサ56から水位検知信号が入力され、モータ8の回転を検知する回転センサ57から回転検知信号が入力され、振動センサ21,22から振動検知信号(アンバランス検知信号)が入力される。
上記構成の洗濯機では、操作パネル4の操作に基づき運転が開始されると、制御手段である制御装置5は、洗い行程、脱水行程、すすぎ行程、脱水行程、乾燥行程の順に運転を実行する(図5参照)。
この脱水行程では、ドラム10の回転に伴い、水槽6が上下方向を主体に振動する。この水槽6の上下振動に応動して、サスペンション7では、水槽6に取り付けたシリンダ24が、上ヨーク33及び上軸受35、上ボビン37及び上コイル36、中間ヨーク38、下ボビン40及び下コイル39、ブラケット44及び下ヨーク41、シール42、下軸受43を伴って、コイルばね54を伸縮させつつシャフト25の周囲を上下方向に振動する。
図5には、第2の実施形態における制御内容を示している。前述のように、上記構成の洗濯機では、操作パネル4の操作に基づき運転が開始されると、制御手段たる制御装置5は、洗い行程、脱水行程、すすぎ行程、脱水行程、乾燥行程の順に運転を実行する。
洗い行程では、制御装置5は、最初に、ドラム10内に収容されて存在する洗濯物の重量(洗濯物の容量ではなく重量という意味での洗濯物量)を検知する重量検知動作(洗濯物重量検知動作)を行う。このとき、ドラム10内に収容されて存在する洗濯物は、洗濯前であるから乾布(乾いた状態の洗濯物)である。従って、この重量検知動作は、乾布重量検知動作であり、本実施形態の洗濯機は乾布重量検知機能を有している。
図6には、第3の実施形態における制御内容を示している。前述のように、上記構成の洗濯機では、操作パネル4の操作に基づき運転が開始されると、制御手段たる制御装置5は、洗い行程、脱水行程、すすぎ行程、脱水行程、乾燥行程の順に運転を実行する。
上述したように、洗い行程では、制御装置5は、最初に、重量検知動作(特には、乾布重量検知動作)を行う。
この乾布重量検知動作時には、ドラム10の回転に伴い、水槽6が上下方向を主体に振動する。
これにより、特に、磁束密度の高いシャフト25と上ヨーク33との間、並びに、中間ヨーク38とシャフト25との間、下ヨーク41とシャフト25との間において、それぞれ磁気粘性流体52の粘度が高まり、摩擦抵抗が増加する。
図10は、第4の実施形態に係るものであり、検知された洗濯物重量とダンパ23の減衰力との関係を示している。即ち、この場合、検知された洗濯物重量の多寡に応ずるダンパ23の減衰力の変化は、図8に示したリニアな変化ではない。本実施形態では、検知された洗濯物重量の多寡に応ずるダンパ23の減衰力の変化は、図10に示すように、検知された洗濯物重量の多、中、少のレベルに応じて、それぞれダンパ23の減衰力を小、中、大の各レベルに段階的に変化させるものである。
本実施形態によれば、制御装置5が記憶するデータ(記憶データ)を簡素化することができ、コストを安く抑えることができる。
図11には、第5の実施形態におけるサスペンション61を示している。このサスペンション61では、ダンパ62は、上下に分かれていない1つのコイル63を1つのボビン64に巻装して有している。そして、ダンパ62は、これらコイル63及びボビン64を、シリンダ24内の上ヨーク33と下ヨーク41(ブラケット44)との間に配設し、固定して保持している。従って、本実施形態のサスペンション61(ダンパ62)は、上記の中間ヨーク38を有していない。
このような構成であっても、制御装置5によるコイル63への通電を制御することで、ダンパ62の減衰力を変化させることができ、また、一定に保つこともできる。
以上に説明した洗濯機は、上述の実施形態にのみ限定されるものではなく、要旨を逸脱しない範囲内で適宜変更して実施し得る。特に、その一つの変更例として、アンバランス検知手段は、前述の振動センサ21,22に限られず、制御装置5がモータ8に流れる電流のうちのq軸電流を算出することでアンバランスを検知するものであってもよい。
Claims (12)
- 外箱と、
この外箱の内部に位置する水槽と、
この水槽の内部に位置して回転駆動される回転槽と、
前記水槽の振動を減衰するものであって減衰力を変化させることが可能なダンパを有し、前記水槽を前記外箱の内部で弾性支持するサスペンションと、
所定の検知動作中は、前記ダンパの減衰力を一定に保つ制御をする制御手段と、
を具備することを特徴とする洗濯機。 - 前記回転槽の回転時におけるアンバランスを検知するアンバランス検知手段を具備し、
前記制御手段は、前記アンバランス検知手段によるアンバランスの検知中は、前記ダンパの減衰力を一定に保つ制御をすることを特徴とする請求項1に記載の洗濯機。 - 前記回転槽の回転時におけるアンバランスを検知するアンバランス検知手段を具備し、
前記制御手段は、前記ダンパの減衰力を変化させる制御を前記回転槽の回転速度が一定である状況で行い、その直後に、前記アンバランス検知手段によるアンバランスの検知を行う制御をすることを特徴とする請求項1に記載の洗濯機。 - 前記制御手段は、前記ダンパの減衰力を変化させる制御を、所定の変化勾配をもって行うことを特徴とする請求項3に記載の洗濯機。
- 前記回転槽の内部に存在する洗濯物の重量を検知する洗濯物重量検知手段を具備し、
前記制御手段は、前記洗濯物重量検知手段による洗濯物重量の検知時に、前記ダンパの減衰力を一定に保つ制御をすることを特徴とする請求項1に記載の洗濯機。 - 前記洗濯物重量検知手段は、前記回転槽の内部に存在する洗濯物が乾布であるときにその重量を検知する乾布重量検知手段で構成され、
前記制御手段は、前記乾布重量検知手段による洗濯物重量の検知時に、前記ダンパの減衰力を一定に保つ制御をすることを特徴とする請求項5に記載の洗濯機。 - 前記洗濯物重量検知手段は、前記回転槽の内部に存在する洗濯物が湿布であるときにその重量を検知する湿布重量検知手段で構成され、
前記制御手段は、前記湿布重量検知手段による洗濯物重量の検知時に、前記ダンパの減衰力を一定に保つ制御をすることを特徴とする請求項5に記載の洗濯機。 - 前記制御手段は、前記洗濯物重量検知手段による洗濯物重量の検知時に、前記ダンパの減衰力を最大に保つ制御をすることを特徴とする請求項5に記載の洗濯機。
- 外箱と、
この外箱の内部に位置する水槽と、
この水槽の内部に位置して回転駆動される回転槽と、
この回転槽の内部に存在する洗濯物の重量を検知する洗濯物重量検知手段と、
前記水槽の振動を減衰するものであって減衰力を変化させることが可能なダンパを有し、前記水槽を前記外箱の内部で弾性支持するサスペンションと、
前記洗濯物重量検知手段の検知結果に応じ、検知された洗濯物重量が少ないほど前記ダンパの減衰力を大きくする制御をする制御手段と、
を具備することを特徴とする洗濯機。 - 前記回転槽の内部に存在する洗濯物を乾燥させる乾燥ユニットを具備することを特徴とする請求項1に記載の洗濯機。
- 前記回転槽の内部に存在する洗濯物を乾燥させる乾燥ユニットを具備することを特徴とする請求項9に記載の洗濯機。
- 前記ダンパは、外部から加える磁界の強度に応じて粘性特性が変化する磁気粘性流体と、この磁気粘性流体に磁界を与えるコイルとを備えることにより、減衰力を変化させることが可能に構成されていることを特徴とする請求項1または9に記載の洗濯機。
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WO2013113688A1 (de) * | 2012-01-31 | 2013-08-08 | Siemens Aktiengesellschaft | Verfahren zur minderung der resonanzschwingungen eines rotoraggregats |
CN114144551A (zh) * | 2019-06-21 | 2022-03-04 | 伊莱克斯家用电器股份公司 | 衣物处理设备 |
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CN104213367B (zh) * | 2013-05-31 | 2017-04-19 | 无锡小天鹅股份有限公司 | 串激电机滚筒洗衣机对衣物重量进行判断的方法 |
CN104695170B (zh) * | 2013-12-09 | 2017-08-29 | 海尔集团公司 | 减振洗衣机及洗衣机减振方法 |
WO2016159539A1 (ko) * | 2015-04-01 | 2016-10-06 | 삼성전자주식회사 | 세탁기 및 세탁기의 제어 방법 |
KR102439141B1 (ko) * | 2015-04-01 | 2022-09-02 | 삼성전자주식회사 | 세탁기 및 세탁기의 제어 방법 |
EP3382084A1 (en) * | 2017-03-27 | 2018-10-03 | Vestel Elektronik Sanayi ve Ticaret A.S. | Determining an imbalance within a wash basket of a washing machine |
CN106996005B (zh) * | 2017-03-28 | 2022-08-16 | 青岛海尔洗涤电器有限公司 | 一种滚筒洗衣机分布脱水控制方法 |
CN109267295A (zh) * | 2018-11-12 | 2019-01-25 | 张凯 | 一种防偏移的洗衣机 |
KR20240009282A (ko) * | 2022-07-13 | 2024-01-22 | 삼성전자주식회사 | 세탁기 및 세탁기의 제어방법 |
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