CN112545409B - Control device for a dishwasher and dishwasher - Google Patents
Control device for a dishwasher and dishwasher Download PDFInfo
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- CN112545409B CN112545409B CN202011305816.7A CN202011305816A CN112545409B CN 112545409 B CN112545409 B CN 112545409B CN 202011305816 A CN202011305816 A CN 202011305816A CN 112545409 B CN112545409 B CN 112545409B
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- magnetic field
- spray arm
- rotating speed
- processor
- rotation speed
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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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
- A47L15/0026—Rinsing phases
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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
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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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/24—Spray arms status, e.g. detection of spray arm rotation
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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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/34—Other automatic detections
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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
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/20—Spray nozzles or spray arms
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- Washing And Drying Of Tableware (AREA)
Abstract
The invention relates to the technical field of dish-washing machines, and discloses a control device for a dish-washing machine and the dish-washing machine, wherein the control device comprises: a rotation speed detecting device configured to detect a rotation speed of a spray arm of the dishwasher; the magnet is arranged on the spray arm; a magnetic field generating device configured to generate a magnetic field into which the magnet enters to obtain a thrust force that facilitates rotation of the spray arm; and a processor configured to: acquiring a rotating speed; determining that the rotating speed is lower than a preset rotating speed; the control magnetic field generating device generates a magnetic field, the problem that the cleaning effect of the dish-washing machine is reduced due to the fact that the rotation of the spraying arm is blocked and the rotating speed is reduced can be effectively solved, the structure is simple, the control is easy, and the use experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of dish-washing machines, in particular to a control device for a dish-washing machine and the dish-washing machine.
Background
The spray type dish washer is the mainstream dish washer at present, and the spray arm is as the main determining part of spray type dish washer, and its structural design and control mode directly determine the cleaning performance. The existing spray dish washer mainly uses water flow sprayed at high temperature and high pressure to impact tableware, thereby achieving the cleaning effect. The high-temperature high-pressure water is sprayed out from the open hole of the spray arm, and the sprayed water flow drives the spray arm to rotate at the same time to form a washing area, so that the largest area is washed.
However, after the spray arm of the dishwasher is used for a period of time, the water spray is not smooth any more due to the reasons of scale blockage and the like, and the rotation is blocked and the uniform spray cannot be carried out, so that the washing effect of the dishwasher is reduced. Based on the above situation, the prior art adopts the motor to drive the spray arm to improve the washing effect, but the motor cost is higher, and the transmission mechanism and the installation seal of the dishwasher of this kind of form are not well realized, are unfavorable for the popularization and use of spray type dishwasher.
Disclosure of Invention
The invention aims to provide a control device for a dish washing machine and the dish washing machine, which have the advantages of simple structure, convenient control and smooth and uniform water spraying.
In order to accomplish the above object, an aspect of the present invention provides a control apparatus for a dishwasher, comprising:
a rotational speed detection device configured to detect a rotational speed of a spray arm of the dishwasher;
the magnet is arranged on the spray arm;
a magnetic field generating device configured to generate a magnetic field into which the magnet enters to obtain a thrust force that facilitates rotation of the spray arm; and
a processor configured to:
acquiring a rotating speed;
determining that the rotating speed is lower than a preset rotating speed;
the magnetic field generating device is controlled to generate a magnetic field.
In an embodiment of the application, the processor is further configured to:
the strength of the generated magnetic field is determined from the rotational speed.
In an embodiment of the application, the processor is further configured to:
and gradually increasing the strength of the magnetic field until the rotating speed reaches a desired rotating speed, wherein the desired rotating speed is greater than or equal to a preset rotating speed.
In an embodiment of the application, the processor is further configured to:
determining the position of the spray arm according to a rotating speed signal acquired from a rotating speed detection device;
and under the condition that the spray arm is determined to enter a preset position in the magnetic field, controlling the magnetic field generating device to generate the magnetic field.
In an embodiment of the present application, the predetermined position is one of:
the position of the spray arm when the spray arm is about to enter the second half area of the magnetic field, and the magnetic field in the second half area can provide thrust for promoting the rotation of the spray arm for the spray arm;
the position of the spray arm just entering the latter half area; and
the spray arm is already in the position it was in when it was in the latter half.
In an embodiment of the application, the processor is further configured to:
determining the duration of the magnetic field when the spray arm is determined to enter a predetermined position in the magnetic field;
the magnetic field generating device is controlled to generate a magnetic field and maintain the magnetic field for a duration of time.
In the embodiment of the present application, the duration is determined according to the region of the magnetic field and the rotation speed.
In the embodiment of the application, the rotating speed detection device is arranged close to the magnetic field generation device;
the rotating speed detection device is configured to generate a first signal when the spray arm rotates to enter a sensing range of the rotating speed detection device, and generate a second signal when the spray arm leaves the sensing range;
the processor is further configured to control the magnetic field generating device to generate a magnetic field if the first signal is received, and to control the magnetic field generating device to stop generating the magnetic field if the second signal is received.
In the embodiment of the application, the spray arm firstly approaches the magnetic field generating device and then approaches the rotating speed detecting device when rotating.
In the embodiment of the present application, when the rotation speed detecting device generates the first signal, the shower arm is located in one of the following positions:
the position of the spray arm when the spray arm is about to enter the second half area of the magnetic field, and the magnetic field in the second half area can provide thrust for promoting the rotation of the spray arm for the spray arm;
the position of the spray arm just entering the latter half area; and
the spray arm is already in the position it was in when it was in the latter half.
In an embodiment of the present application, the rotation speed detection device includes at least one of a hall sensor and a proximity switch.
In an embodiment of the present application, a magnetic field emission device includes: an electromagnetic coil for generating a magnetic field; and
and the magnetic field adjusting circuit is used for adjusting the strength of the magnetic field.
In an embodiment of the present application, a magnetic field adjusting circuit includes:
the power supply contact piece is used for being electrically connected with a power supply;
the input end of the cut-off circuit is electrically connected with the power supply contact piece, and the output end of the cut-off circuit is electrically connected with the processor and used for enabling the processor to control the on-off of the circuit between the electromagnetic coil and the power supply contact piece;
and the input end of the amplifying circuit is electrically connected with the processor, and the output end of the amplifying circuit is electrically connected with the electromagnetic coil and used for adjusting the current in the electromagnetic coil.
In the embodiment of the application, the magnetic field emission device and the rotating speed detection device are both arranged on the inner peripheral wall of the dishwasher.
In a second aspect, the present invention provides a dishwasher including the control device for a dishwasher according to the above-described embodiments.
Through the technical scheme, set up the rotational speed that rotational speed check out test set detected dish washer spray arm in controlling means, set up the magnet on spray arm, produce the magnetic field that can promote spray arm rotation through setting up magnetic field generating device, still be provided with treater control magnetic field generating device and produce magnetic field when spray arm rotational speed is less than preset rotational speed, this a controlling means simple structure for dish washer, easily control can promote dish washer the effect of washing dishes and user's use experience and feel.
Drawings
FIG. 1 is a schematic, diagrammatic view (side view) of a dishwasher;
FIG. 2 is a schematic, diagrammatic illustration (top view) of the dishwasher;
FIG. 3 is a schematic diagram of the components of a control device for a dishwasher according to an embodiment of the present invention;
fig. 4 is a schematic diagram of output signals of a rotation speed detection apparatus according to an embodiment of the present invention:
FIG. 5 is a schematic diagram of a magnetic field regulation circuit according to an embodiment of the present invention.
Description of the reference numerals
1 spray arm 2 magnet
3 rotating speed detection device 4 magnetic field generation device
61 power supply contact 62 cut-off circuit
6201 a first resistor 6202 a second resistor
6203 third resistor 6204 fourth resistor
6205 amplifying circuit of first triode 63
6301 fifth resistor 6302 sixth resistor
6303 seventh resistor 6304 second triode
6305 the (3N +2) th resistor 6306 the (3N +3) th resistor
6307 the (3N +4) th transistor of 6308 the (N +1) th resistor
Time for T1 speed detecting equipment to output low level
Time of half a revolution of the T2 spray arm
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and devices are omitted so as not to obscure the description of the present invention with unnecessary detail.
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
One embodiment of the present invention provides a control device for a dishwasher, as shown in fig. 1 to 5, the control device including:
a rotation speed detection device 3 configured to detect a rotation speed of the spray arm 1 of the dishwasher;
the magnet 2 is arranged on the spray arm 1;
a magnetic field generating device 4 configured to generate a magnetic field into which the magnet 2 enters to obtain a thrust force that facilitates rotation of the spray arm 1; and
a processor 5 configured to:
acquiring a rotating speed;
determining that the rotating speed is lower than a preset rotating speed;
the magnetic field generating device 4 is controlled to generate a magnetic field.
The dishwasher in the embodiment of the application is provided with the spray arm 1, the spray arm 1 rotates and sprays water in the process of implementing the dish washing function of the dishwasher, and tableware to be washed is washed, so that the tableware is washed; still be equipped with controlling means among this dish washer, this controlling means can detect the rotation speed of spray arm 1 to promote spray arm 1 rotatory when the rotation speed of spray arm 1 is less than the predetermined rotational speed, avoid dish washer because of spray arm 1 rotation speed descends to lead to it to wash inhomogeneously, and then avoid dish washer's cleaning performance to reduce. In particular, the control means comprise a rotation speed detection device 3, a magnet 2, a magnetic field generation device 4, a processor 5 and optionally a memory. The rotation speed detection device 3, the magnetic field generation device 4, and the memory may be electrically connected to the processor 5. The magnet 2 may be provided at the end of the spray arm 1, and the rotation speed detecting device 3 may be provided at the inner peripheral wall of the dishwasher for detecting the rotation speed of the spray arm 1. The magnetic field generating device 4 may generate a magnetic field that when the magnet 2 located on the spray arm 1 is rotated into the generated magnetic field, a boosting force provided by the magnetic field is obtained to facilitate the rotation of the spray arm 1. The rotating speed detection device 3 detects and acquires the rotating speed of the spraying arm 1 of the dish washing machine and then transmits the rotating speed value to the processor 5, the processor 5 can compare the acquired rotating speed with the preset rotating speed, and according to the comparison result, if the detected rotating speed of the spraying arm 1 is higher than or equal to the preset rotating speed, the spraying arm 1 rotates smoothly, the washing effect of the dish washing machine can be ensured, and the processor 5 does not need to control the magnetic field generation device 4; if the detected rotating speed of the spray arm 1 is lower than the preset rotating speed, it is shown that the rotation of the spray arm 1 is blocked at the moment, the cleaning effect of the dish-washing machine is reduced, the processor 5 needs to control the magnetic field generating device 4, so that the magnetic field generating device 4 generates a magnetic field with the same polarity as the magnet 2, according to the principle that like poles repel each other, the spray arm 1 with the magnet 2 can be repelled by the magnetic field to apply thrust after entering the magnetic field, the spray arm 1 can accelerate the rotating speed under the action of the thrust, and the cleaning effect of the dish-washing machine is improved. The preset rotational speed may be stored in the processor 5 or alternatively in a memory for retrieval by the processor 5. The control device is simple in structure and easy to control, and can effectively solve the problem that the cleaning effect of the dish-washing machine is reduced due to the fact that the rotation of the spray arm 1 is blocked and the rotating speed is reduced.
In the embodiment of the present application, the processor 5 is further configured to:
the strength of the generated magnetic field is determined from the rotational speed.
It can be understood that the dishwasher can achieve the optimal cleaning effect when the spray arm 1 rotates at the expected rotating speed, if the rotating speed of the spray arm 1 during actual working is lower, the difference between the rotating speed and the expected rotating speed is larger, and at the moment, the magnetic field generating device 4 should generate a magnetic field with stronger magnetic field intensity to apply thrust to the spray arm 1 to improve the rotating speed; conversely, if the difference between the rotating speed of the spray arm 1 during actual operation and the expected rotating speed is smaller, the magnetic field generating device 4 may generate a magnetic field with relatively weak magnetic field strength to apply thrust to the spray arm 1 to raise the rotating speed. In order to achieve the desired rotational speed, the spray arm 1 is rotated at different rotational speeds, and correspondingly different magnetic fields exert thrust on the spray arm. The memory is prestored with corresponding relation data of the rotating speed and the magnetic field intensity of the spray arm 1, the processor 5 is used for calling out corresponding magnetic field intensity data according to the detected rotating speed, and sending a control instruction to the magnetic field generating equipment 4 according to the called out magnetic field intensity data to enable the magnetic field generating equipment to generate corresponding magnetic field intensity.
In the embodiment of the present application, the processor 5 is further configured to:
and gradually increasing the magnetic field intensity until the rotating speed reaches a desired rotating speed, wherein the desired rotating speed is greater than or equal to the preset rotating speed.
When the magnetic field is required to be opened to accelerate the spray arm 1, the mode of gradually increasing the magnetic field intensity can be adopted, the condition that the dishwasher has potential unexpected faults due to the fact that the magnetic field intensity of the magnetic field generating equipment 4 is increased rapidly is avoided, and the processor 5 can control the magnetic field generating equipment 4 to gradually increase the magnetic field intensity in a slow-advancing mode until the expected rotating speed is reached, and the generation of the magnetic field is stopped.
In the embodiment of the present application, the rotation speed detection device 3 includes at least one of a hall sensor and a proximity switch, that is, the hall sensor or the proximity switch is disposed in the dishwasher to detect the position of the spray arm 1, and acquire the rotation speed of the spray arm 1. The rotation speed detecting device 3 is preferably a unipolar hall sensor in this embodiment because the hall sensor has advantages of high sensitivity, small size, and the like, and a hall sensing surface of the hall sensor faces the magnet 2 (e.g., S pole shown in the figure) and forms a hall sensing range S1 having an operating point and a release point.
When the magnet 2 on the spray arm 1 rotates to the position near the Hall sensor and reaches an action point, the Hall sensor outputs a low level; when the magnet 2 on the spray arm 1 moves away from the hall sensor and reaches the release point, the hall sensor outputs a high level. In addition, the number of the hall sensors may correspond to the number of the magnets 2, and in this embodiment, the number of the magnets 2 may be 2, so that the number of the hall sensors is also 2, and the final output pulse signal of the hall sensors is as shown in fig. 4, where T1 is the time when the magnet 2 passes through the hall sensing range S1 when the shower arm 1 rotates, that is, the time when the rotation speed detection device 3 outputs a low level; t2 is the time of the half rotation of the spray arm 1, and the range of the half rotation of the spray arm 1 is S2, so that the rotation speed V of the spray arm 1 becomes S1/T1 or S2/T2.
In an embodiment of the present application, the processor 5 is further configured to:
determining the position of the spray arm 1 according to the rotating speed signal obtained from the rotating speed detection device 3;
and controlling the magnetic field generating device 4 to generate a magnetic field under the condition that the spray arm 1 is determined to enter a preset position in the magnetic field.
It will be appreciated that the speed detection device 3 has a working range when in the working state, and when the spray arm 1 with the magnet 2 rotates into the working range, the speed detection device 3 can detect the rotation speed and send a corresponding speed signal to the processor 5. The processor 5 may determine the rotational speed of the spray arm 1 from the received rotational speed signal. In addition, the processor 5 may also determine (or estimate) the position of the spray arm based on the rotational speed signal and the rotational speed of the spray arm. Specifically, when the spray arm 1 approaches the rotation speed detection device 3, the rotation speed detection device 3 generates a rotation speed signal (e.g., a high level signal) in response to the approach of the spray arm 1. The processor 5, upon receiving the rotational speed signal, may determine the current position of the spray arm 1. In addition, processor 5 may also determine the rotational speed of spray arm 1 based on the frequency of the received rotational speed signal (i.e., the number of rotational speed signals per unit time), knowing the rotational speed and the position of spray arm 1 at a time (e.g., the time at which rotational speed signal generation by rotational speed detection device 3 is triggered), processor 5 may determine or estimate the position of spray arm 1 after that time.
The determination or estimation of the position of the spray arm 1 during the rotation is advantageous for the adjustment of the magnetic field generating device 4.
In one example, the magnetic field generated by the magnetic field generating device 4 may have a field strength range, and the field strength range that can affect the rotational speed of the spray arm 1 may be defined as an operating range. In order to save power consumption, it is desirable that the magnetic field generating device 4 is turned on to generate a magnetic field when the spray arm 1 is rotated to the operating range, and the magnetic field generating device 4 stops operating outside the operating range. Thus, a predetermined position may be set, which may be a predetermined position in the magnetic field (or working range). As described above, the processor 5 may determine or estimate the moment at which the spray arm 1 enters the predetermined position, and in this case, in the case where the spray arm 1 is rotated to the predetermined position, control the magnetic field emission device 4 to generate the magnetic field to urge the spray arm 1 to rotate. In one example, the processor 5 may control the magnetic field emission device 4 by way of Pulse Width Modulation (PWM). Furthermore, the processor 5 may also determine the moment (or actual period) at which the magnetic field generating device 4 stops generating the magnetic field from the determination or estimation of the position of the spray arm 1.
In one embodiment, the magnetic field generated by the magnetic field generating device 4 is at an angle to the spray arm 1 entering the magnetic field range, i.e., the center line of the magnetic field forms an angle with the spray arm 1. In this case, the magnetic field generated by the magnetic field generating device 4 may be divided into two regions, a first half region that enters first and a second half region that enters later when the spray arm 1 rotates. It should be noted here that the first half area and the second half area are not necessarily equally divided. In one example, the first half area may be larger than the second half area. In another example, the first half area may be smaller than the second half area. When the spray arm 1 rotates to enter the first half area, the magnetic field generated by the magnetic field generating device 4 is applied to the spray arm 1 (for example, a magnet at the end of the spray arm 1) to generate a reverse thrust which hinders the rotation of the spray arm 1, and when the spray arm 1 enters the second half area, a forward thrust which promotes the rotation of the spray arm 1 is obtained. That is, in this case, it is desirable that the magnetic field generating device 4 is turned on to generate the magnetic field when the shower arm 1 is rotated to the latter half region. In one example, the predetermined position may be a position where the shower arm 1 is located in a latter half region of the magnetic field. In another example, the predetermined position may be a position at which the spray arm 1 is about to enter the latter half of the magnetic field. In yet another example, to maximize the boosting effect of the magnetic field generator 4, the predetermined position may be the position at which the spray arm 1 is just entering the latter half of the magnetic field. The determination of the first half area and the second half area may be determined depending on the manner in which the installation angle (i.e., the magnetic field orientation) of the magnetic-field-generating device 4 is implemented.
As mentioned above, the processor 5 may determine the moment at which the magnetic field generating device 4 generates the magnetic field, in addition to which the processor 5 may determine the duration of maintaining the magnetic field. Specifically, the processor 5 may determine the region (range) of the magnetic field and the rotational speed of the spray arm 1. More specifically, when the shower arm 1 is rotated to a predetermined position (i.e., when the time at which the magnetic field is generated is determined), the processor 5 controls the magnetic field generating device 4 to generate the magnetic field. Since the range of the magnetic field is known, the time required for the spray arm 1 to rotate from the predetermined position to leave the range of the magnetic field can be determined, which can be the duration of the magnetic field. Accordingly, the processor 5 may also be configured to determine the duration of the magnetic field in the event that it is determined that the spray arm 1 has entered a predetermined position in the magnetic field; the magnetic field generating device 4 is controlled to generate a magnetic field and to maintain the magnetic field for a duration of time.
In another embodiment of the present application, the rotation speed detection device 3 is disposed in close proximity to the magnetic field generation device 4;
the rotation speed detection device 3 is configured to generate a first signal if the spray arm 1 rotates into a sensing range of the rotation speed detection device 3 and to generate a second signal if the spray arm leaves the sensing range;
the processor 5 is further configured to control the magnetic field generating device 4 to generate a magnetic field if the first signal is received, and to control the magnetic field generating device 4 to stop generating a magnetic field if the second signal is received.
In this embodiment, the rotational speed detection device 3 is disposed in close proximity to the magnetic field generation device 4, and the processor 5 in the above-described embodiment can be replaced with the detection state of the rotational speed detection device 3 to estimate the timing at which the shower arm 1 enters the predetermined position in the magnetic field.
Specifically, taking the example where the rotation speed detection device 3 is a hall sensor, the hall sensor sends out a first signal (for example, triggers the hall sensor to generate a low-level signal) when detecting that the shower arm 1 enters the hall sensing range, and the hall sensor sends out a second signal (for example, triggers the hall sensor to generate a high-level signal) when detecting that the shower arm 1 is away from the hall sensing range. Since the rotation speed detection device 3 and the magnetic field generation device 4 are disposed in close proximity (the sensing range of the hall sensor and the magnetic field range of the magnetic field generation device 4 can be adjusted to overlap each other (e.g., mostly overlap, completely overlap)), it can be considered that the shower arm 1 enters the range of the magnetic field generated by the magnetic field generation device 4 when the processor 5 receives the first signal, and the shower arm 1 leaves the range of the magnetic field when the processor 5 receives the second signal. Thus, the processor 5 can determine, by the moment of receiving the first signal and the moment of receiving the second signal, the moment of generating the magnetic field and the moment of switching off the magnetic field by the magnetic field generating device 4, that is to say the moment and the duration of generating the magnetic field. In this way, the processor 5 may not need to estimate the position of the rotation of the spray arm 1 as in the above embodiments.
In this manner, it is also desirable that the magnetic field is turned on when the spray arm 1 is rotated to the latter half of the magnetic field to avoid the influence of the thrust reversal. The mounting positions of the magnetic field generating device 4 and the rotation speed detecting device 3 can be adjusted to achieve this object. Specifically, in one embodiment, the magnetic field generating device 4 and the rotation speed detecting device 3 may be arranged such that the spray arm 1 approaches the magnetic field generating device 4 first and then approaches the rotation speed detecting device 3 when rotating. That is, the shower arm 1 first enters the magnetic field range of the magnetic field generating device 4 and then enters the sensing range of the rotational speed detecting device 3 (e.g., hall sensor). The predetermined position in the above-described embodiment can be determined by adjusting the degree of overlap of the magnetic field range and the induction range. Specifically, when the hall sensor detects that the shower arm 1 is approaching and generates the first signal, the shower arm 1 is located at the predetermined position mentioned in the above embodiment, that is, at the point of coming into, just entering or already being located in the latter half region of the magnetic field generated by the magnetic-field generating device 4 (i.e., the region where the forward thrust is generated). In addition, when the hall sensor detects that the shower arm 1 is rotated away and generates the second signal, the shower arm 1 is located at a position away from the latter half of the magnetic field, for example, to be about to leave, just leave, or leave shortly. In this manner, the same effects as in the above-described embodiment can be achieved, but the processor 5 can be avoided from determining or estimating the position of the spray arm 1 at a future time, reducing the computational load of the processor.
In an embodiment of the present application, a magnetic field emission device includes: an electromagnetic coil for generating a magnetic field; and
and a magnetic field adjusting circuit 6 for adjusting the intensity of the magnetic field.
It can be understood that the electromagnetic coil is used in the present embodiment to generate the magnetic field, specifically, the electromagnetic coil is made by surrounding the coil on the outside of the soft iron rod, when the coil is electrified, the electromagnetic coil will induce the magnetic field according to the ampere rule, the electrifying direction determines the magnetic field direction, and since the magnet 2 on the spray arm 1 has the S pole facing the electromagnetic coil, the induced magnetic field is set to be the S pole facing the spray arm 1. When the rotating speed of the spray arm 1 is lower than the preset rotating speed, the processor 5 controls the electromagnetic coil to generate a magnetic field which is in repulsion with the magnet 2 to push the spray arm 1 to move. Further, because the magnetic field intensity generated by the electromagnetic coil can be realized by adjusting the magnitude of the current, a magnetic field adjusting circuit 6 for adjusting the magnetic field intensity is further arranged in the embodiment, the larger the current in the electromagnetic coil is adjusted by the magnetic field adjusting circuit 6, the stronger the magnetic field generated by the electromagnetic coil is, the larger the repulsive force between the magnetic field and the magnet 2 on the spray arm 1 is, and the more the rotating speed of the spray arm 1 is increased; similarly, the smaller the current in the electromagnetic coil is regulated by the magnetic field regulating circuit 6, the weaker the magnetic field generated by the electromagnetic coil is, the smaller the repulsive force between the magnetic field and the magnet 2 on the spray arm 1 is, and the relatively smaller the increase of the rotating speed of the spray arm 1 is.
In the embodiment of the present application, the magnetic field adjusting circuit 6 includes:
a power supply contact 61 for electrically connecting with a power supply source;
the input end of the cut-off circuit 62 is electrically connected with the power supply contact piece 61, and the output end of the cut-off circuit 62 is electrically connected with the processor 5, so that the processor 5 controls the on-off of the circuit between the electromagnetic coil and the power supply contact piece 61;
and the input end of the amplifying circuit 63 is electrically connected with the processor 5, and the output end of the amplifying circuit 63 is electrically connected with the electromagnetic coil and is used for adjusting the current in the electromagnetic coil.
As shown, the cutoff circuit 62 includes:
a first resistor 6201, a first end of the first resistor 6201 is electrically connected with the power supply contact 61, and a second end is electrically connected with the input end of the processor 5; the input end of the Hall sensor is electrically connected with the first end of the first resistor 6201, the output end of the Hall sensor is electrically connected with the second end of the first resistor 6201, and the grounding end of the Hall sensor is connected with the ground;
a second resistor 6202, a third resistor 6203, a first transistor 6205, and a fourth resistor 6204, wherein a first terminal of the third resistor 6203 is electrically connected to the power supply contact 61, and a second terminal is electrically connected to the input terminal of the processor 5 through the second resistor 6202; a base of the first triode 6205 is connected to a second end of the third resistor 6203, an emitter of the first triode 6205 is electrically connected to a first end of the third resistor 6203, and a collector of the first triode 6205 is electrically connected to a first end of the fourth resistor 6204, wherein the first triode 6205 is a PNP-type triode; the second end of the fourth resistor 6204 is electrically connected with the first end of the electromagnetic coil, and the second end of the electromagnetic coil is connected with the ground;
in the cut-off circuit 62, when the hall sensor outputs a low level, the collector of the first transistor 6205 is turned on, and the fourth resistor 6204 and the circuit branch where the electromagnetic coil is located are turned on, so that the electromagnetic coil can generate a magnetic field.
The amplifying circuit 63 includes N identical amplifying circuit branches, an input end of each amplifying circuit branch is electrically connected to the processor 5, an output end of each amplifying circuit branch is electrically connected to the first end of the electromagnetic coil, and the first amplifying branch and the nth amplifying branch are taken as examples (the other amplifying circuit branches are not shown in the figure), wherein the first amplifying branch includes:
a fifth resistor 6301, a sixth resistor 6302, a second transistor 6304, and a seventh resistor 6303, wherein a first end of the sixth resistor 6302 is electrically connected to the power supply contact 61, and a second end is electrically connected to the output end of the processor 5 through the fifth resistor 6301; a base electrode of the second triode 6304 is connected to a second end of the sixth resistor 6302, a collector electrode of the second triode 6304 is electrically connected to a first end of the sixth resistor 6302, and an emitter electrode of the second triode 6304 is electrically connected to a first end of the seventh resistor 6303, wherein the second triode 6304 is an NPN-type triode; a second end of the seventh resistor 6303 is electrically connected to the first end of the electromagnetic coil;
a (3N +2) th resistor 6305, a (3N +3) th resistor 6306, an N +1 th triode 6308, and a (3N +4) th resistor 6307, wherein a first end of the (3N +3) th resistor 6306 is electrically connected to the power supply contact 61, and a second end is electrically connected to the output terminal of the processor 5 through the (3N +4) th resistor 6305; a base electrode of the (N +1) th triode 6308 is connected with a second end of the (3N +3) th resistor 6306, a collector electrode of the (N +1) th triode 6308 is electrically connected with a first end of the (3N +3) th resistor 6306, and an emitter electrode of the (N +4) th triode 6307 is electrically connected with a first end of the (3N +4) th resistor 6307, wherein the (N +1) th triode 6308 is an NPN-type triode; the second end of the (3N +4) th resistor 6307 is electrically connected to the first end of the electromagnetic coil;
in the amplifying circuit 63, the seventh resistor 6303 to the (3N +4) th resistor 6307 are all connected in parallel with the fourth resistor 6204, and the processor 5 controls the conduction of the second triode 6304 to the (N +1) th triode 6308 according to the requirement for increasing the rotation speed of the spray arm 1, if the rotation speed of the spray arm 1 to be increased is larger, the required magnetic field strength is larger, the current flowing through the electromagnetic coil should be larger at this time, and the number of resistors connected in parallel with the fourth resistor 6204 in the seventh resistor 6303 to the (3N +4) th resistor 6307 should be larger; similarly, the smaller the rotation speed of the spray arm 1 to be raised, the smaller the number of resistors from the seventh resistor 6303 to the (3N +4) th resistor 6307 to be connected in parallel with the fourth resistor 6204 should be.
In this embodiment, the magnetic field generating device 4 and the rotation speed detecting device 3 are both disposed on the inner peripheral wall of the dishwasher, that is, the electromagnetic coil and the hall sensor are both disposed on the inner peripheral wall of the dishwasher in this embodiment, and the height of the arrangement of the electromagnetic coil and the hall sensor is consistent with the height of the magnet 2, so that the electromagnetic coil and the hall sensor can act on the magnet 2 to the greatest extent, and the rotation speed detection of the spray arm 1 and the rotation speed lifting action of the spray arm 1 are well realized.
The invention provides a dish washing machine, which comprises the control device for the dish washing machine, wherein the magnet 2 is arranged on the spray arm 1 of the dish washing machine, the rotating speed detection device 3 detects the rotating speed of the spray arm 1, and when the rotating speed of the spray arm 1 is lower than the preset rotating speed, the processor 5 controls the magnetic field generation device 4 to generate a magnetic field to accelerate the spray arm 1, so that the problem that the cleaning effect of the spray arm 1 of the dish washing machine is reduced due to the blocked rotation is solved, the structure is simple, the control is easy, and the use experience of a user can be improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, apparatus, article or device in which the element is comprised.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (12)
1. A control device for a dishwasher, comprising:
a rotational speed detection device configured to detect a rotational speed of a spray arm of the dishwasher;
a magnet disposed on the spray arm;
a magnetic field generating device configured to generate a magnetic field into which the magnet can obtain a thrust that facilitates rotation of the spray arm; and
a processor configured to:
acquiring the rotating speed;
determining that the rotating speed is lower than a preset rotating speed;
controlling the magnetic field generating device to generate the magnetic field;
determining the strength of the generated magnetic field according to the rotation speed;
gradually increasing the strength of the magnetic field until the rotation speed reaches a desired rotation speed, wherein the desired rotation speed is greater than or equal to the preset rotation speed;
determining the position of the spray arm according to a rotating speed signal acquired from the rotating speed detection equipment;
and controlling the magnetic field generating device to generate the magnetic field under the condition that the spray arm enters a preset position in the magnetic field.
2. The control device of claim 1, wherein the predetermined position is one of:
the position of the spray arm is about to enter a rear half area of the magnetic field, and the magnetic field can provide thrust for promoting the spray arm to rotate in the rear half area;
the position of the spray arm just entering the rear half area; and
the spray arm is already located at the position of the rear half area.
3. The control device of claim 1, wherein the processor is further configured to:
determining a duration of the magnetic field if it is determined that the spray arm has entered a predetermined position in the magnetic field;
controlling the magnetic field generating device to generate the magnetic field and maintain the magnetic field for the duration of time.
4. The control device of claim 1, wherein the duration is determined based on a region of the magnetic field and the rotational speed.
5. The control apparatus according to claim 1, characterized in that the rotation speed detecting device is disposed in close proximity to the magnetic field generating device;
the rotating speed detection device is configured to generate a first signal when the spray arm rotates to enter a sensing range of the rotating speed detection device and generate a second signal when the spray arm leaves the sensing range;
the processor is further configured to control the magnetic field generating device to generate the magnetic field if the first signal is received, and to control the magnetic field generating device to stop generating the magnetic field if the second signal is received.
6. The control device of claim 5, wherein the spray arm rotates to approach the magnetic field generating means first and then the rotation speed detecting means.
7. The control device of claim 6, wherein when the rotational speed detection apparatus generates the first signal, the spray arm is located in one of:
the position of the spray arm is about to enter a rear half area of the magnetic field, and the magnetic field can provide thrust for promoting the spray arm to rotate in the rear half area;
the position of the spray arm just entering the rear half area; and
the spray arm is already located at the position of the rear half area.
8. The control apparatus according to any one of claims 1 to 7, wherein the rotation speed detection device includes at least one of a Hall sensor, a proximity switch.
9. The control apparatus according to claim 1, wherein the magnetic field emission device comprises: an electromagnetic coil for generating the magnetic field; and
a magnetic field adjusting circuit for adjusting the intensity of the magnetic field.
10. The control device of claim 9, wherein the magnetic field adjustment circuit comprises:
the power supply contact piece is used for being electrically connected with a power supply;
the input end of the cut-off circuit is electrically connected with the power supply contact piece, and the output end of the cut-off circuit is electrically connected with the processor and used for enabling the processor to control the on-off of the circuit between the electromagnetic coil and the power supply contact piece;
the input end of the amplifying circuit is electrically connected with the processor, and the output end of the amplifying circuit is electrically connected with the electromagnetic coil and used for adjusting the current in the electromagnetic coil.
11. The control device according to claim 1, wherein the magnetic field emission means and the rotation speed detection means are provided on an inner peripheral wall of the dishwasher.
12. A dishwasher, characterized by comprising a control device for a dishwasher according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011305816.7A CN112545409B (en) | 2020-11-19 | 2020-11-19 | Control device for a dishwasher and dishwasher |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011305816.7A CN112545409B (en) | 2020-11-19 | 2020-11-19 | Control device for a dishwasher and dishwasher |
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| Publication Number | Publication Date |
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| CN112545409A CN112545409A (en) | 2021-03-26 |
| CN112545409B true CN112545409B (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011305816.7A Active CN112545409B (en) | 2020-11-19 | 2020-11-19 | Control device for a dishwasher and dishwasher |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113679319A (en) * | 2021-08-19 | 2021-11-23 | 华帝股份有限公司 | Spraying cleaning device and control method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1136460B (en) * | 1980-11-28 | 1986-08-27 | Zanussi Zeltron Inst | DISHWASHER WITH REEL ROTATION CONTROL DEVICE |
| DE10121083A1 (en) * | 2001-04-28 | 2002-10-31 | Aweco Appliance Sys Gmbh & Co | Position sensor for dishwasher detects revolution rate and position of spray arm and level of rinse dosing device with single sensor element in form of Hall sensor in rinse dosing device |
| DE102005046803B4 (en) * | 2005-09-30 | 2008-04-03 | Electrolux Home Products Corporation N.V. | Dishwasher with spray arm |
| DE102008043613B4 (en) * | 2008-11-10 | 2011-02-24 | BSH Bosch und Siemens Hausgeräte GmbH | Electric household appliance with at least one liquid feed |
| DE102010001654A1 (en) * | 2010-02-08 | 2011-08-11 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Dishwasher with at least one spray arm |
| DE102016217912B3 (en) * | 2016-09-19 | 2018-02-01 | BSH Hausgeräte GmbH | Domestic dishwasher |
| CN209463943U (en) * | 2018-08-31 | 2019-10-08 | 佛山市海汇洗涤技术服务有限公司 | A kind of structure detecting spraying arm of dish washer revolving speed |
| CN110353596A (en) * | 2019-07-05 | 2019-10-22 | 广东万家乐厨房科技有限公司 | A kind of spray arm stall processing method and dish-washing machine |
| CN111000514A (en) * | 2019-11-22 | 2020-04-14 | 青岛海尔洗碗机有限公司 | Dish washing machine |
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