Washing equipment and control method thereof

Abstract

The invention provides washing equipment and a control method thereof. The washing equipment comprises an electromagnetic heating device, a heating control circuit, a first electronic switch and a control unit, the first input end of the heating control circuit is connected with a first polarity line of power supply equipment, and the second input end of the heating control circuit is connected with a second polarity line of the power supply equipment through the first electronic switch; the output end of the heating control circuit is connected with the electromagnetic heating device, and the first electronic switch is further connected with the control unit. The control unit controls the on-off state of the first electronic switch according to the running state of the inner cylinder, so that the heating control circuit executes corresponding operation on sinusoidal signals between the first polarity line and the second polarity line, and therefore the on-off state of the electromagnetic heating device is controlled. According to the technical scheme, the technical problem that when the inner cylinder stops rotating, the electromagnetic heating device continuously operates, so that the local temperature of the inner cylinder is too high, and the structure of the inner cylinder is damaged can be solved, and therefore the service life of the inner cylinder is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of washing equipment, and in particular to a washing equipment and a control method thereof. Background Art

[0002] As your quality of life continues to improve, people's requirements for the washing effect of washing equipment are getting higher and higher. Therefore, users generally heat the washing water during the washing process, which can not only improve the decontamination ability of the detergent, but also sterilize the clothes.

[0003] At present, an electromagnetic heating device can be installed in the washing equipment. When the electromagnetic heating device is powered on, it generates an alternating magnetic field, which in turn generates eddy currents in the inner drum, causing the inner drum to heat itself to heat the washing water. However, during the heating process of the electromagnetic heating device, when the inner drum is stopped, the electromagnetic heating device continues to work, causing the local temperature of the inner drum to be too high, which may seriously damage the structure of the inner drum. Summary of the invention

[0004] The present application provides a washing device and a control method thereof, which can solve the technical problem that the structure of the inner drum is damaged due to excessively high local temperature of the inner drum during electromagnetic heating.

[0005] In a first aspect, an embodiment of the present application provides a washing device, comprising: an electromagnetic heating device, a heating control circuit, a first electronic switch, and a control unit, wherein a first input end of the heating control circuit is connected to a first polarity line of a power supply device, a second input end of the heating control circuit is connected to a second polarity line of the power supply device through the first electronic switch, an output end of the heating control circuit is connected to the electromagnetic heating device, and the first electronic switch is also connected to the control unit;

[0006] The control unit controls the on and off of the first electronic switch according to the operating state of the inner drum, so that the heating control circuit performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on and off of the electromagnetic heating device.

[0007] In one embodiment, the control unit controls the first electronic switch to close when the inner drum is running, so that the heating control circuit generates a control signal based on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the electromagnetic heating device to perform heating;

[0008] The control unit controls the first electronic switch to be disconnected when the inner drum stops rotating, so that the heating control circuit stops outputting the control signal, thereby controlling the electromagnetic heating device to stop heating.

[0009] In one embodiment, the first input terminal of the heating control circuit is connected to the cathode of the first diode, the anode of the first diode is connected to the first polarity line, and the first input terminal of the heating control circuit is also connected to the cathode of the second diode, and the anode of the second diode is connected to the second polarity line.

[0010] In one embodiment, in the heating control circuit, the anode of the third diode is connected to the first polarity line, the cathode of the third diode is connected to the cathode of the voltage regulator through the first resistor and the second resistor, the anode of the voltage regulator is connected to the first pin of the optocoupler, the second pin of the optocoupler is connected to the second polarity line, one end of the third resistor is connected to the cathode of the voltage regulator, the other end of the third resistor is connected to the second polarity line, the third pin of the optocoupler is connected to the output end of the DC power supply, the fourth pin of the optocoupler is connected to the base of the transistor through the fourth resistor, the collector of the transistor is connected to the DC power supply through the fifth resistor, and the collector of the transistor is also connected to the electromagnetic heating device, the emitter of the transistor is connected to the collector of the transistor through the first capacitor, and the emitter of the transistor is grounded.

[0011] In one of the embodiments, in the heating control circuit, one end of the sixth resistor is connected to the base of the transistor, the other end of the sixth resistor is connected to the emitter of the transistor, the second diode is reversely connected in parallel to the input part of the optocoupler, and the input part of the optocoupler is also connected in parallel with a second capacitor and a seventh resistor.

[0012] In one embodiment, the first electronic switch includes a relay or a thyristor.

[0013] In one embodiment, the first polarity line is a live line, and the second polarity line is a neutral line;

[0014] Alternatively, the first polarity line is a neutral line, and the second polarity line is a live line.

[0015] In one embodiment, it further includes: a second electronic switch, one end of the second electronic switch is connected to the electromagnetic heating device, and the other end of the second electronic switch is connected to the power supply device;

[0016] The control unit controls the power supply of the electromagnetic heating device through the second electronic switch.

[0017] In a second aspect, an embodiment of the present application provides a control method for a washing device, which is applied to any washing device provided in the first aspect of the embodiment of the present application, and the method includes:

[0018] Monitor the operating status of the inner cylinder;

[0019] According to the operation state of the inner drum, the on-off of the first electronic switch is controlled so that the heating control circuit performs a corresponding operation on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on-off of the electromagnetic heating device. In one embodiment, according to the operation state of the inner drum, the on-off of the first electronic switch is controlled so that the heating control circuit performs a corresponding operation on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on-off of the electromagnetic heating device, including:

[0020] When the inner drum is running, the first electronic switch is controlled to be closed, so that the heating control circuit generates a control signal based on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the electromagnetic heating device to perform heating;

[0021] When the inner drum stops rotating, the first electronic switch is controlled to be disconnected, so that the heating control circuit stops outputting the control signal, thereby controlling the electromagnetic heating device to stop heating.

[0022] The technical solution provided by the embodiment of the present application is to set a heating control circuit and a first electronic switch in the washing device, and the control unit can control the on and off of the electromagnetic heating device through the first electronic switch and the heating control circuit based on the operating state of the inner drum, that is, the operating state of the electromagnetic heating device can change with the operating state of the inner drum. In this way, the technical problem of excessive local temperature of the inner drum and damage to the structure of the inner drum caused by the continuous operation of the electromagnetic heating device when the inner drum is stopped can be avoided, thereby improving the service life of the inner drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a washing device provided in an embodiment of the present application;

[0024] Figure 2 Another structural schematic diagram of a washing device provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of a heating control circuit provided in an embodiment of the present application;

[0026] Figure 4 A schematic flow chart of a control method for a washing machine provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the technical solutions in the embodiments of the present application are further described in detail through the following embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. It should also be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, rather than all structures.

[0028] Figure 1 A schematic diagram of the structure of a washing device provided in an embodiment of the present application. Figure 1 As shown, the washing device may include: an electromagnetic heating device 10, a heating control circuit 11, a first electronic switch 12 and a control unit 13, wherein the first input end of the heating control circuit 11 is connected to the first polarity line of the power supply device, the second input end of the heating control circuit 11 is connected to the second polarity line of the power supply device through the first electronic switch 12, the output end of the heating control circuit 11 is connected to the electromagnetic heating device 10, and the first electronic switch 12 is also connected to the control unit 13.

[0029] Specifically, the electromagnetic heating device 10 may include an electromagnetic heating coil and a rectifier ( Figure 1 The heating program is started, and the current and voltage are converted into direct current through the rectifier and the driving circuit, so that the direct current becomes high-frequency alternating current exceeding the audio frequency, and the high-frequency alternating current is output to the electromagnetic heating coil, thereby generating a high-frequency alternating magnetic field, and its electromagnetic induction lines act on the inner cylinder made of metal. Strong eddy currents are generated in the metal inner cylinder due to electromagnetic induction. When the eddy currents overcome the internal resistance of the inner cylinder and flow, the conversion of electrical energy into thermal energy is completed, thereby achieving heating of the inner cylinder, and further achieving the purpose of heating the water encapsulated in the inner cylinder.

[0030] The first input terminal of the heating control circuit 11 is connected to the first polarity line of the power supply device, the second input terminal is connected to the second polarity line of the power supply device through the first electronic switch 12, and the output terminal is connected to the electromagnetic heating device. The heating control circuit 11 can convert the sinusoidal signal between the first polarity line and the second polarity line into a corresponding control signal, and the electromagnetic heating device performs a corresponding operation (start heating or stop heating) based on the received control signal. Among them, the polarity of the first polarity line and the second polarity line is opposite, that is, when the first polarity line is the live wire, the second polarity line is the neutral wire, and vice versa, when the first polarity line is the neutral wire, the second polarity line is the live wire. In other words, the polarity of the voltage signals at the two input terminals of the heating control circuit 11 should be opposite so that the heating control circuit 11 can work normally. When the first input terminal of the heating control circuit 11 is connected to the live wire, the second input terminal should be connected to the neutral wire, and when the first input terminal of the heating control circuit 11 is connected to the neutral wire, the second input terminal should be connected to the live wire.

[0031] Optionally, the first electronic switch 12 may be a relay or a thyristor.

[0032] The control unit 13 may be a programmable single chip microcomputer. The control unit 13 may monitor the running state of the inner drum in real time, and control the on and off of the first electronic switch 12 according to the running state of the inner drum, so that the heating control circuit 11 performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on and off of the electromagnetic heating device 10. As an optional implementation, the control process may be: the control unit 13 controls the first electronic switch 12 to close when the inner drum is running, so that the heating control circuit 11 generates a control signal based on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the electromagnetic heating device 10 to perform heating; the control unit 13 controls the first electronic switch 12 to open when the inner drum stops, so that the heating control circuit 11 stops outputting the control signal, thereby controlling the electromagnetic heating device 10 to stop heating.

[0033] That is to say, when the inner drum is running and the washing water in the inner drum needs to be heated, the control unit 13 controls the first electronic switch 12 to close, and the power supply device inputs a voltage signal to the heating control circuit 11 through the first polarity line and the second polarity line. The heating control circuit 11 converts the voltage signal (or sinusoidal signal) into a square wave signal (i.e., a control signal), and the electromagnetic heating device 10 starts heating after receiving the square wave signal. When the inner drum stops, the control unit 13 controls the first electronic switch 12 to turn off, the heating control circuit 11 is disconnected from the second polarity line of the power supply device, and the power supply device stops inputting a voltage signal to the heating control circuit 11, so that the heating control circuit 11 has no square wave signal output, and the electromagnetic heating device 10 stops heating.

[0034] Figure 2 Another structural schematic diagram of the washing device provided in the embodiment of the present application. Figure 2 As shown, the washing device may include: an electromagnetic heating device 10, a heating control circuit 11, a first electronic switch 12, and a control unit 13, wherein the first input end of the heating control circuit 11 is connected to the cathode of the first diode (D1), the anode of the first diode (D1) is connected to the first polarity line of the power supply device, the first input end of the heating control circuit 11 is also connected to the cathode of the second diode (D2), the anode of the second diode (D2) is connected to the second polarity line of the power supply device, the second input end of the heating control circuit 11 is connected to the second polarity line of the power supply device through the first electronic switch 12, the output end of the heating control circuit 11 is connected to the electromagnetic heating device 10, and the first electronic switch 12 is also connected to the control unit 13. The control unit 13 controls the on-off of the first electronic switch 12 according to the running state of the inner drum, so that the heating control circuit 11 performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on-off of the electromagnetic heating device 10.

[0035] Taking the polarity line connected to the first diode (D1) as the live line and the polarity line connected to the second diode (D2) as the neutral line as an example, when the first electronic switch 12 is closed, if the polarity line connected to the second input end of the heating control circuit 11 is the neutral line, the second diode (D2) is reversely cut off. When the voltage of the live line is higher than the neutral line, the first diode (D1) is turned on, and the power supply device inputs a voltage signal to the heating control circuit 11 through the first polarity line and the second polarity line, and the heating control circuit 11 starts to work. When the voltage of the live line is lower than the neutral line, the first diode (D1) is cut off, and the heating control circuit 11 cannot work. In this way, as the sine wave between the first polarity line and the second polarity line changes alternately, the output end of the heating control circuit 11 can generate a square wave signal with high and low changes. The electromagnetic heating device 10 starts to perform heating after receiving the square wave signal.

[0036] Similarly, if the polarity line connected to the second input end of the heating control circuit 11 is the live line, the first diode (D1) is reversely cut off. When the neutral line voltage is higher than the live line, the second diode (D2) is turned on, and the power supply device inputs a voltage signal to the heating control circuit 11 through the first polarity line and the second polarity line, and the heating control circuit 11 starts to work. When the neutral line voltage is lower than the live line, the second diode (D2) is cut off, and the heating control circuit 11 cannot work. In this way, as the sine wave between the first polarity line and the second polarity line changes alternately, the output end of the heating control circuit 11 can generate a square wave signal with high and low changes. The electromagnetic heating device 10 starts heating after receiving the square wave signal.

[0037] When the inner drum stops rotating, the control unit 13 controls the first electronic switch 12 to be disconnected, and the heating control circuit 11 is disconnected from the second polarity line of the power supply device. After the first electronic switch 13 is disconnected, the heating control circuit 11 has no input signal, so that the heating control circuit 11 has no square wave signal output, and the electromagnetic heating device 10 stops heating.

[0038] In this embodiment, the first input terminal of the heating control circuit is connected to the first polarity line and the second polarity line of the power supply device through the first diode and the second diode respectively. In this way, when the specific polarity of the second polarity line connected to the second input terminal of the heating control circuit is unknown, the polarity of the polarity lines connected to the two input terminals of the heating control circuit is opposite, so that the heating control circuit can generate a control signal after the first electronic switch is closed, thereby realizing the on and off control of the electromagnetic heating device.

[0039] In one embodiment, optionally, a specific circuit structure diagram of the heating control circuit 11 is also provided. Figure 3As shown, in the heating control circuit 11, the positive electrode of the third diode (D3) is connected to the first polarity line, the negative electrode of the third diode (D3) is connected to the negative electrode of the voltage regulator (D4) through the first resistor (R1) and the second resistor (R2), the positive electrode of the voltage regulator (D4) is connected to the first pin of the optical coupler (U1), the second pin of the optical coupler (U1) is connected to the second polarity line, one end of the third resistor (R3) is connected to the negative electrode of the voltage regulator (D4), and the other end of the third resistor (R3) is connected to the second polarity line. , a third pin of the optical coupler (U1) is connected to the output end of the DC power supply (V1), a fourth pin of the optical coupler (U1) is connected to the base of the transistor (Q1) through a fourth resistor (R4), a collector of the transistor (Q1) is connected to the DC power supply (V1) through a fifth resistor (R5), and the collector of the transistor (Q1) is also connected to the electromagnetic heating device 10, an emitter of the transistor (Q1) is connected to the collector of the transistor (Q1) through a first capacitor (C1), and the emitter of the transistor (Q1) is grounded.

[0040] Continue to see Figure 3 Optionally, in the heating control circuit 11, one end of the sixth resistor (R6) is connected to the base of the transistor (Q1), the other end of the sixth resistor (R6) is connected to the emitter of the transistor (Q1), the fourth diode (D5) is reversely connected in parallel to the input part of the optical coupler (U1), and the input part of the optical coupler (U1) is also connected in parallel with the second capacitor (C2) and the seventh resistor (R7). In a specific implementation, the fourth resistor (R4) and the sixth resistor (R6) can also be integrated in the transistor (Q1).

[0041] The third diode (D3) is a rectifying diode, which allows the input current to be conducted in a unidirectional manner and can reduce the power consumption of the first resistor (R1) and the second resistor (R2).

[0042] The first resistor (R1) and the second resistor (R2) are voltage-dividing resistors, and form a voltage divider with the third resistor (R3).

[0043] The third resistor (R3) is also a voltage-dividing resistor, and forms a voltage divider with the first resistor (R1) and the second resistor (R2). When the voltage divided by the third resistor (R3) exceeds the sum of the primary junction voltages of the voltage-stabilizing tube (D4) and the optical coupler (U1), the input part of the optical coupler (U1) will be turned on; otherwise, the input part of the optical coupler (U1) will not be turned on. In this way, the voltage threshold of the input of the heating control circuit 11 can be adjusted by adjusting the parameter values ​​of the first resistor (R1), the second resistor (R2), the third resistor (R3) and the voltage-stabilizing tube (D4), thereby improving the stability of the circuit.

[0044] The voltage regulator (D4) is used to adjust the conduction threshold of the heating control circuit 11 to improve the anti-interference ability of the circuit.

[0045] The fourth resistor (R4) is a current limiting resistor used to adjust the base characteristics of the transistor (Q1) and the characteristics of the output part of the optical coupler.

[0046] The fifth resistor (R5) is a pull-up resistor, the sixth resistor (R6) is a bias resistor, and the seventh resistor (R7) is a bias resistor that bypasses noise current to prevent mis-conduction of the optocoupler (U1).

[0047] The DC power supply can provide a 3.3V voltage, so that when the AC power input to the heating control circuit 11 changes alternately with the sine wave, the output end of the heating control circuit 11 can alternately generate a high level.

[0048] The working principle of the heating control circuit 11: Taking the first input end of the heating control circuit 11 connected to the live wire and the second input end connected to the neutral wire as an example, when the first electronic switch 12 is closed, when the alternating current input to the heating control circuit 11 is in the positive half cycle, the voltage of the live wire is higher than the neutral wire, and the third diode (D3) is reversely cut off. At this time, the heating control circuit 11 cannot work, and the output end of the heating control circuit 11 is high level. When the alternating current input to the heating control circuit 11 is in the negative half cycle, the voltage of the neutral wire is higher than the live wire, and the third diode (D3) is turned on. At this time, the current flows in from the third diode (D3), passes through the first resistor (R1), the second resistor (R2), the voltage regulator (D4), and the input part of the optical coupler (U1), and then flows out. When there is current in the input part of the optical coupler (U1), the transistor (Q1) is turned on, and the upper network of the first capacitor (C1) (i.e., the output end of the heating control circuit 11) changes from a high level to a low level. As the sine wave of the alternating current changes alternately, the output end of the heating control circuit 11 generates a square wave signal with high and low changes.

[0049] When the first electronic switch 12 is disconnected, the heating control circuit 11 has no input signal, and the heating control circuit 11 has no square wave signal output, so the electromagnetic heating device 10 is controlled to stop heating.

[0050] In one embodiment, the washing device may further include a second electronic switch ( Figure 1 and Figure 2 (not shown), one end of the second electronic switch is connected to the electromagnetic heating device 10, and the other end is connected to the power supply device. The control unit 13 controls the power supply of the electromagnetic heating device 10 through the second electronic switch. Optionally, the second electronic switch may include a relay or a thyristor.

[0051] The washing device provided in the embodiment of the present application is provided with a heating control circuit and a first electronic switch in the washing device, and the control unit can control the on and off of the electromagnetic heating device through the first electronic switch and the heating control circuit based on the operating state of the inner drum, that is, the operating state of the electromagnetic heating device can change with the operating state of the inner drum, so that the technical problem of excessively high local temperature of the inner drum and damage to the structure of the inner drum caused by the continuous operation of the electromagnetic heating device when the inner drum is stopped can be avoided, thereby improving the service life of the inner drum.

[0052] In one embodiment, a control method for a washing device is also provided. The method is applied to the washing device described in any of the above embodiments. Figure 4 As shown, the method may include:

[0053] S401, monitoring the operating status of the inner drum.

[0054] The running state of the inner drum can be monitored by acquiring the running state of the motor, or a corresponding speed sensor can be provided on the inner drum to monitor the running state of the content through the speed sensor. This embodiment does not limit the method for acquiring the running state of the inner drum.

[0055] S402, controlling the on and off of the first electronic switch according to the operating state of the inner drum, so that the heating control circuit performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on and off of the electromagnetic heating device.

[0056] Optionally, the above-mentioned process of S402 may be: when the inner drum is running, the first electronic switch is controlled to be closed, so that the heating control circuit generates a control signal based on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the electromagnetic heating device to perform heating; when the inner drum stops, the first electronic switch is controlled to be opened, so that the heating control circuit stops outputting the control signal, thereby controlling the electromagnetic heating device to stop heating.

[0057] The control method of the washing device provided in the embodiment of the present application is provided with a heating control circuit and a first electronic switch in the washing device, and the control unit can control the on and off of the electromagnetic heating device through the first electronic switch and the heating control circuit based on the operating state of the inner drum, that is, the operating state of the electromagnetic heating device can change with the operating state of the inner drum, so as to avoid the technical problem that the local temperature of the inner drum is too high due to the continuous operation of the electromagnetic heating device when the inner drum is stopped, thereby increasing the service life of the inner drum.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A washing device, characterized in that: include: An electromagnetic heating device, a heating control circuit, a first electronic switch and a control unit, wherein a first input end of the heating control circuit is connected to a first polarity line of a power supply device, a second input end of the heating control circuit is connected to a second polarity line of the power supply device through the first electronic switch, an output end of the heating control circuit is connected to the electromagnetic heating device, and the first electronic switch is also connected to the control unit; The control unit controls the on and off of the first electronic switch according to the operating state of the inner drum, so that the heating control circuit performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on and off of the electromagnetic heating device.

2. The washing device according to claim 1, characterized in that: The control unit controls the first electronic switch to close when the inner drum is running, so that the heating control circuit generates a control signal based on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the electromagnetic heating device to perform heating; The control unit controls the first electronic switch to be disconnected when the inner drum stops rotating, so that the heating control circuit stops outputting the control signal, thereby controlling the electromagnetic heating device to stop heating.

3. The washing device according to claim 1, characterized in that: The first input end of the heating control circuit is connected to the cathode of the first diode, the anode of the first diode is connected to the first polarity line, the first input end of the heating control circuit is also connected to the cathode of the second diode, and the anode of the second diode is connected to the second polarity line.

4. The washing device according to claim 1, characterized in that: In the heating control circuit, the anode of the third diode is connected to the first polarity line, the cathode of the third diode is connected to the cathode of the voltage regulator through the first resistor and the second resistor, the anode of the voltage regulator is connected to the first pin of the optocoupler, the second pin of the optocoupler is connected to the second polarity line, one end of the third resistor is connected to the cathode of the voltage regulator, the other end of the third resistor is connected to the second polarity line, the third pin of the optocoupler is connected to the output end of the DC power supply, the fourth pin of the optocoupler is connected to the base of the transistor through the fourth resistor, the collector of the transistor is connected to the DC power supply through the fifth resistor, and the collector of the transistor is also connected to the electromagnetic heating device, the emitter of the transistor is connected to the collector of the transistor through the first capacitor, and the emitter of the transistor is grounded.

5. The washing device according to claim 4, characterized in that: In the heating control circuit, one end of the sixth resistor is connected to the base of the transistor, the other end of the sixth resistor is connected to the emitter of the transistor, the fourth diode is reversely connected in parallel to the input part of the optocoupler, and the input part of the optocoupler is also connected in parallel with the second capacitor and the seventh resistor.

6. The washing device according to any one of claims 1 to 5, characterized in that: The first electronic switch includes a relay or a thyristor.

7. The washing device according to any one of claims 1 to 5, characterized in that: The first polarity line is a live line, and the second polarity line is a neutral line; Alternatively, the first polarity line is a neutral line, and the second polarity line is a live line.

8. The washing device according to any one of claims 1 to 5, characterized in that: Also includes: a second electronic switch, one end of the second electronic switch being connected to the electromagnetic heating device, and the other end of the second electronic switch being connected to the power supply device; The control unit controls the power supply of the electromagnetic heating device through the second electronic switch.

9. A method for controlling a washing device, characterized in that: Applied to the washing device according to any one of claims 1 to 8, the method comprises: Monitor the operating status of the inner cylinder; The on-off of the first electronic switch is controlled according to the operating state of the inner drum, so that the heating control circuit performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on-off of the electromagnetic heating device.

10. The control method according to claim 9, characterized in that: The method of controlling the on-off of the first electronic switch according to the running state of the inner drum so that the heating control circuit performs corresponding operations on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the on-off of the electromagnetic heating device, comprises: When the inner drum is running, the first electronic switch is controlled to be closed, so that the heating control circuit generates a control signal based on the sinusoidal signal between the first polarity line and the second polarity line, thereby controlling the electromagnetic heating device to perform heating; When the inner drum stops rotating, the first electronic switch is controlled to be disconnected, so that the heating control circuit stops outputting the control signal, thereby controlling the electromagnetic heating device to stop heating.

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