Load switching circuit, load switching method, and domestic appliance

Abstract

The application discloses a load switching circuit, a load switching method and a household device, wherein a receiving module, a control module, a resistive load module and an inductive load module are included. The receiving module acquires an instruction signal; the receiving module sends the instruction signal to the control module; the control module determines a load module corresponding to the instruction signal according to the instruction signal, selectively controls the resistive load module or the inductive load module to work, receives a control signal transmitted by the control module through the receiving module, and transmits the control signal to the resistive load module and the inductive load module; according to specific instructions of the control signal, it is determined whether the resistive load module or the inductive load module works, different load type modules work according to user requirements, and the problem that different loads require different topological circuit requirements is overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit control, and more particularly, to a load switching circuit, a load switching method and a household device. BACKGROUND

[0002] With the increasing improvement of the living standards of users, the demand for product functions is increasing. In household devices, the load of a conventional high-power wireless power transmission receiving part is usually single, but for some special occasions, multiple loads exist at the same time, but the requirements of multiple loads for a receiving topology circuit are completely different. Therefore, it is an urgent problem to be solved to provide a circuit capable of adapting to the demand of multiple loads. SUMMARY

[0003] In view of the above problems, the present application provides a load switching circuit, a load switching method and a household device to improve the above problems.

[0004] In a first aspect, an embodiment of the present application provides a load switching circuit, comprising: a receiving module comprising a receiving port and a first port, the receiving port being configured to receive an instruction signal; a control module comprising a transmitting port and a first port, the transmitting port of the control module being electrically connected to the receiving port of the receiving module and receiving the instruction signal; a resistive load module comprising a first port and a second port, the first port of the resistive load module being connected to the first port of the receiving module, the second port of the resistive load module being connected to the first port of the control module, and the control module being configured to control the resistive load module to work according to the instruction signal; and an inductive load module comprising a first port and a second port, the first port of the inductive load module being connected to the first port of the receiving module, the second port of the inductive load module being connected to the first port of the control module, and the control module being configured to control the inductive load module to work according to the instruction signal.

[0005] In a second aspect, an embodiment of the present application further provides a load switching method, which is used in the load switching circuit of the first aspect and comprises: the receiving module acquires an instruction signal; the receiving module sends the instruction signal to the control module; and the control module determines a load module corresponding to the instruction signal according to the instruction signal, and selectively controls the resistive load module or the inductive load module to work.

[0006] In a third aspect, an embodiment of the present application further provides a household device, comprising: a device body and the load switching circuit of the first aspect, wherein the load switching circuit is arranged in the device body.

[0007] The application provides a load switching circuit, which comprises a receiving module, a control module, a resistive load module and an inductive load module. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments and drawings obtained by those skilled in the art without creative labor are within the scope of the present application.

[0009] Figure 1 A structure schematic diagram of a load switching circuit provided by an embodiment of the present application is shown.

[0010] Figure 2 A structure schematic diagram of another load switching circuit provided by an embodiment of the present application is shown.

[0011] Figure 3 A structure schematic diagram of still another load switching circuit provided by an embodiment of the present application is shown.

[0012] Figure 4 A structure schematic diagram of yet another load switching circuit provided by an embodiment of the present application is shown.

[0013] Figure 5 A structure schematic diagram of still another load switching circuit provided by an embodiment of the present application is shown.

[0014] Figure 6 A structure schematic diagram of still another load switching circuit provided by an embodiment of the present application is shown.

[0015] Figure 7 A structure schematic diagram of still another load switching circuit provided by an embodiment of the present application is shown.

[0016] Figure 8 A structure schematic diagram of still another load switching circuit provided by an embodiment of the present application is shown.

[0017] Figure 9 Fig. 1 shows a structural schematic diagram of another load switching circuit provided by an embodiment of the present application.

[0018] Figure 10 Fig. 2 shows a structural schematic diagram of still another load switching circuit provided by an embodiment of the present application.

[0019] Figure 11 Fig. 3 shows a flow schematic diagram of a load switching method provided by an embodiment of the present application.

[0020] Figure 12 Fig. 4 shows a flow schematic diagram of another load switching method provided by an embodiment of the present application.

[0021] Figure 13 Fig. 5 shows a structural block diagram of a household device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0023] When multiple load types exist on a circuit at the same time, simple series or parallel connection cannot realize the conversion of multiple loads due to different circuit topologies required by each load. In some special occasions, resistive load and inductive load exist at the same time, for example, a blender, whose motor drive is inductive load, but the heating plate heating is resistive load. These two loads have completely different requirements for receiving topology circuit, for example, inductive load will bring inductance characteristics to change its receiving frequency, and if the resistive load is placed behind the bridge stack, it will increase the high-frequency rectification pressure of the bridge stack.

[0024] The inventor proposes the load switching circuit, load switching method and household device provided by the present application, wherein the load switching circuit comprises a receiving module, a control module, a resistive load module and an inductive load module, the receiving module acquires an instruction signal; the receiving module sends the instruction signal to the control module; the control module determines the load module corresponding to the instruction signal according to the instruction signal, selectively controls the resistive load module or the inductive load module to work, receives the control signal transmitted by the control module through the receiving module, and transmits the control signal to the resistive load module and the inductive load module, and according to the specific instruction of the control signal, selects whether the resistive load module or the inductive load module works, realizes that different load type modules work according to user demand, and overcomes the problem that different loads require different topology circuits.

[0025] The load switching circuit provided by the embodiments of the present application will be described in detail below through specific embodiments.

[0026] Please refer to Figure 1 The embodiment of the present application provides a load switching circuit, which comprises a receiving module 110, a control module 140, a resistive load module 120 and an inductive load module 130. The receiving module 110 is electrically connected with the control module 140, and the receiving module 110 is also connected with the resistive load module 120 and the inductive load module 130 respectively.

[0027] In the embodiment of the present application, the receiving module 110 can comprise a receiving port (not shown in the figure), a first port 110a and a second port 110b, wherein the receiving port is used for receiving the instruction signal of the user and the control signal of the control module 140.

[0028] Specifically, the receiving module 110 is provided with a receiving coil, which can be a wireless signal receiving coil. The receiving coil receives the instruction signal of the user through wireless transmission technology. The wireless transmission technology transmits signals through electromagnetic waves.

[0029] In some embodiments, the receiving coil can also be a wireless charging receiving coil. When the transmitting coil inside the charging base is connected with alternating current, a magnetic field is generated, so that the receiving coil in the receiving module 110 generates an induced voltage, which is used to power the circuit. Wireless charging technology can be divided into non-radiation charging technology and radiation charging technology. The non-radiation charging technology couples inductively between coils, and energy is transmitted through a magnetic field. Application examples include electric toothbrush charging and the like. The specific function of the receiving coil can be selected according to actual use needs, and the present application does not make any limitation.

[0030] In the embodiment of the present application, as shown in Figure 1 The control module 140 can comprise a transmitting port (not shown in the figure) and a first port 140a. The transmitting port of the control module 140 is electrically connected with the receiving port of the receiving module 110 and receives the control signal transmitted by the control module 140.

[0031] In an embodiment, the control module 140 can comprise an integrated circuit chip. Taking a single-chip microcomputer as an example, the integrated circuit chip adopts a very large scale integrated circuit technology to integrate a central processing unit (CPU for short), a random access memory, a read-only memory, a variety of ports and interrupt systems, a timer / counter, a transmitter and other functions into a small and perfect microcomputer system on a silicon chip. After receiving the instruction signal of the user, the control module 140 is electrically connected with the receiving module 110 through the transmitter, so as to transmit the control signal, so that the circuit works according to the instruction signal of the user.

[0032] Optionally, the integrated circuit chip can be an STM32 single-chip microcomputer, or a 51 single-chip microcomputer, etc., which can be selected according to actual needs, and the present application does not make any limitation in this regard.

[0033] In another embodiment, the control module 140 can also be a programmable logic controller (PLC). The PLC is a digital electronic device with a microprocessor, which is a digital logic controller for automatic control. The control instructions can be loaded into the memory for storage and execution at any time. The programmable controller is composed of internal CPU, instruction and data memory, input and output unit, power module, digital and analog units, etc. The user transmits the instruction signal through the PLC, and the instruction signal is transmitted from the transmitting port of the PLC to the receiving port of the receiving module 110.

[0034] In the embodiment of the present application, the resistive load module 120 includes a first port 120a and a second port 120b. The first port 120a of the resistive load module 120 is connected to the first port 110a of the receiving module 110, and the second port 120b of the resistive load module 120 is connected to the first port 140a of the control module 140. The control module 140 controls the resistive load module 120 to work according to the instruction signal.

[0035] The first port 110a of the receiving module 110 is connected to the first port 120a of the resistive load module 120. The control signal received by the receiving module 110 can be transmitted to the resistive load module 120 by using a circuit, so that the resistive load module 120 works according to the control signal. In addition, the second port 120b of the resistive load module 120 is also connected to the first port 140a of the control module 140, so that the control module 140 can monitor whether the resistive load module 120 works normally.

[0036] In some embodiments, referring to Figure 2 , the resistive load module 120 includes a second controller 121 and a resistive load 122.

[0037] The second controller 121 includes a first port 121a and a second port 121b, and the resistive load 122 includes a first port 122a and a second port 122b. The first port 121a of the second controller 121 is connected to the second port 110b of the receiving module 110, the second port of the second controller 121 is connected to the first port 122a of the resistive load 122, and the second port 122b of the resistive load 122 is connected to the first port 140a of the control module 140. The second controller 121 is used to control the resistive load 122 to work.

[0038] The resistive load 122 refers to the load that is resistive when there is no phase difference between the load current and the load voltage compared with the power supply, in other words, a pure resistive load that only works through resistive elements is called a resistive load. Common devices using resistive loads include iodine tungsten lamps, incandescent lamps, resistance furnaces, ovens, electric water heaters, and the like. These devices use resistive loads such as heating tubes and the like to utilize the resistance characteristics to generate light and heat.

[0039] The second controller 121 is used to control whether the resistive load 122 works or not. The second controller 121 can be a switching controller or a relay, which can be selected according to actual needs, and the present application does not limit this.

[0040] When the transmitting port of the control module 140 transmits the control signal about the working of the resistive load 122 to the receiving port of the receiving module 110, the first port 110a of the receiving module 110 transmits the control signal to the first port 121a of the second controller 121, the second controller 121 is closed, and the second port 121b of the second controller 121 transmits the control signal to the resistive load 122 through the first port 122a of the resistive load 122, and the resistive load 122 works. The first port 140a of the control module 140 is also connected with the second port 122b of the resistive load 122, which facilitates the user to monitor whether the resistive load 122 works normally or not.

[0041] In the embodiment of the present application, the inductive load module 130 includes a first port 130a and a second port 130b, the first port 130a of the inductive load module 130 is connected with the first port 110a of the receiving module 110, and the second port 130b of the inductive load module 130 is connected with the first port 140a of the control module 140, and the control module 140 controls the inductive load module 130 to work according to the instruction signal.

[0042] The inductive load module 130 is connected in parallel with the resistive load module 120, when the instruction signal is to command the inductive load module 130 to work, the resistive load module 120 does not work, and it is convenient for the control module to control the inductive load module 130 and the resistive load module 120.

[0043] In some embodiments, please refer to Figure 3The inductive load module 130 can include a rectifier 131 and an inductive load 132. The rectifier 131 includes a first port 131a, a second port 131b, a third port 131c and a fourth port 131d. The inductive load 132 includes a first port 132a and a second port 132b. The first port 131a of the rectifier 131 is connected to the first port 110a of the receiving module 110. The second port 131b of the rectifier 131 is connected to the first port 132a of the inductive load 132. The second port 132b of the inductive load 132 is connected to the third port 131c of the rectifier 131. The fourth port 131d of the rectifier 131 is connected to the first port 140a of the control module 140. The rectifier 131 is configured to convert the current flowing through the rectifier 131 into a current suitable for the inductive load 132.

[0044] The rectifier 131 can convert alternating current into direct current, or convert direct current into alternating current. The specific conversion mode can be selected according to actual needs, and the application does not limit the conversion mode.

[0045] Optionally, the rectifier 131 can be a bridge stack or an inverter.

[0046] The inductive load 132 can be a load with an inductance parameter. Specifically, it refers to a load with a phase difference characteristic between load current and load voltage, such as a transformer, a motor, etc. Another type refers to some devices that consume active power and also consume reactive power, and have a coil load circuit.

[0047] Specifically, the rectifier 131 rectifies the current flowing into the inductive load 132 into alternating current to ensure the normal operation of the inductive load 132. At the same time, the rectifier 131 can also avoid high-frequency rectification stress, and only needs to be rectified once to ensure the normal operation of the circuit.

[0048] Specifically, please refer to Figure 4 The inductive load module 130 further includes a first controller 133. The first controller 133 includes a first port 133a and a second port 133b. The first port 133a of the first controller 133 is connected to the second port 131b of the rectifier. The second port 133b of the first controller 133 is connected to the first port 132a of the inductive load 132. The first controller 133 controls the operation of the inductive load 132.

[0049] The first controller 133 is configured to control whether the inductive load 132 operates. The first controller 133 can be a switch controller or a relay, and the specific type can be selected according to actual needs, and the application does not limit the type of the first controller 133.

[0050] The load switching circuit 100 provided by the application comprises a receiving module 110, a control module 140, a resistive load module 120 and an inductive load module 130, wherein the receiving module 110 acquires an instruction signal; the receiving module 100 sends the instruction signal to the control module 140; the control module 140 determines a load module corresponding to the instruction signal according to the instruction signal, selectively controls the resistive load module 120 or the inductive load module 130 to work, receives a control signal transmitted by the control module 140 through the receiving module 110, and transmits the control signal to the resistive load module 120 and the inductive load module 130, and according to the specific instruction of the control signal, selects whether the resistive load module 120 or the inductive load module 130 works, so that different load type modules work according to user requirements, and the problem that different loads require different topological circuit is overcome.

[0051] In some embodiments of the application, please refer to Figure 5 The load switching circuit 100 can further comprise a master switch module 150, wherein the master switch module 150 comprises a first port 150a and a second port 150b, the first port 150a of the master switch module 150 is connected with the first port 110a of the receiving module, the second port 150b of the master switch module 150 is connected with the first port 120a of the resistive load module, and the master switch module 150 is used for controlling the circuit to work.

[0052] The master switch module 150 is arranged between the receiving module 110, the resistive load module 120 and the inductive load module 130, and controls the voltage flowing out of the receiving module 110 to flow into the resistive load module 120 or the inductive load module 130. The master switch module 150 can also be used to avoid the controller in the resistive load module 120 and the inductive load module 130 from being in a high-voltage sparking state for a long time, thereby delaying the loss of the service life of the controller.

[0053] In some embodiments, please refer to Figure 6The master module 150 further comprises a third controller 152 and a master switch 151, the third controller 152 comprises a first port 152a and a second port 152b, the master switch 151 comprises a first port 151a, a second port 151b and a third port 151c; the first port 151a of the master switch 151 is connected with the second port 110b of the receiving module 110 and the first port 152a of the third controller 152 respectively, the second port 151b of the master switch 150 is connected with the second port 152b of the third controller 152, and the third port 151c of the master switch 150 is connected with the first port 122a of the resistive load, and the third controller 152 is used for controlling whether the master switch 151 is closed.

[0054] Specifically, the master switch 151 can be a thyristor, the thyristor has three poles, which are an anode, a cathode and a control pole, and the tube core is a four-layer structure composed of P-type conductor and N-type conductor, and has three PN junctions, which is quite different from the silicon rectifier diode with only one PN junction. When the thyristor is applied, as long as a small current or voltage is applied to the control pole, a large anode current or voltage can be controlled. The anode corresponds to the first port 151a of the master switch 151, the cathode corresponds to the third port 151c of the master switch 151, and the control pole corresponds to the second port 151b of the master switch 151. The second port 151b of the master switch 151 is connected with the third controller 152, and when the voltage flowing through the third controller 152 is very small, the anode can control a large voltage.

[0055] The third controller 152 can be an optical coupler, and the optical coupler works at zero voltage, so the voltage flowing through the third controller 152 is 0, at this time, the master switch 151 can control a large voltage for the circuit to work.

[0056] In other embodiments, referring to Figure 7 The load switching circuit 100 further comprises a zero-crossing detection module 160, the zero-crossing detection module 160 comprises a first port 160a and a second port 160b, the first port 160a of the zero-crossing detection module 160 is connected with the second port 122b of the resistive load 122, and the second port 160b of the zero-crossing detection module 160 is connected with the first port 140a of the control module, and the zero-crossing detection module 160 is used for detecting whether the circuit works normally.

[0057] The zero-crossing detection module 160 is used to detect the zero-crossing signal, so as to detect whether the third controller 152 is turned on. The zero-crossing detection module 160 transmits the detected data to the control module 140, and if the third controller 152 is not turned on, the control module 140 sends the instruction signal to the receiving module 110 again, so that the third controller 152 is turned on, and the circuit is turned on, and the circuit works according to the instruction signal.

[0058] In another embodiment, referring to Figure 8 , the receiving module 110 further comprises a second port 110b, the control module 140 further comprises a second port 140b, the load switching circuit 110 further comprises a voltage detection module 170, the first port 170a, the second port 170b and the third port 170c of the voltage detection module 170, the first port 170a of the voltage detection module 170 is connected with the first port 110a of the receiving module 110, the second port 170b of the voltage detection module 170 is connected with the second port 110b of the receiving module 110, the third port 170c of the voltage detection module 170 is connected with the second port 140b of the control module 140, and the voltage detection module 170 is used to detect the voltage of the two ports of the receiving module 110.

[0059] The first port 170a and the second port 170b of the voltage detection module 170 are connected with the first port 110a and the second port 110b of the receiving module 110 respectively, so that the voltage of the two ends of the receiving module 110 can be detected, and the voltage of the receiving module 110 is transmitted to the second port 140b of the control module 140 through the third port 170c of the voltage detection module 170, and the control module 140 adjusts the voltage input into the receiving module 110 according to the voltage of the two ends of the receiving module 110, so as to ensure that the resistive load module 120 and the inductive load module 130 work normally.

[0060] In another embodiment, referring to Figure 9 , the load switching circuit 100 further comprises a battery module 180, the battery module 180 is used to supply power for the load switching circuit, one port of the battery module 180 is grounded, and the battery module 180 is used to supply power for the whole circuit.

[0061] The battery in the battery module 180 can be a storage battery or a constant voltage lithium battery. The voltage output from the battery module 180 is 5V, which is used to power the circuit when the wireless charging transmitting end stops working, so that the circuit can receive the instruction signal sent by the control module 140 in time and feedback to the instruction signal. When the battery is a storage battery, the wireless charging end also charges the battery when it communicates with the receiving module 110, so that the circuit can normally communicate with the control module 140 when it is not working.

[0062] Please refer to Figure 10 , Figure 10 The load switching circuit provided by the example embodiment of the present application is shown. The receiving module 110 includes a receiving coil and a compensation capacitor in resonance with the receiving coil. The receiving coil and the compensation capacitor in series form a resonance circuit that can filter the electrical signal, thereby obtaining the real instruction signal of the user. The receiving module 110 also includes a filter capacitor, which is connected in parallel with the resonance circuit. The filter capacitor not only filters out the AC points in the circuit, but also makes the DC current more smooth and stable. The instruction signal filtered by the receiving module 110 is transmitted to the main control module 150 along with the filtered DC current. The main control module 150 includes a thyristor and an optocoupler. The thyristor is used to control the on-off of the main circuit, and the optocoupler is the switch of the thyristor. When the voltage through the optocoupler is zero, the optocoupler is turned on, and the thyristor is closed, and the circuit is turned on. The circuit after being turned on transmits the instruction signal to the second port of the main control module 150, and judges whether the resistive load module 120 or the inductive load module 130 works according to the instruction signal. If the resistive load module 120 works, the relay in the resistive load module 120 is closed, and the resistive load 122 starts to work.

[0063] If the inductive load module 130 works, the current first passes through the rectifier bridge to convert the current from DC to AC for the inductive load 132 to work. The AC current passes through the parallel resonance circuit formed by the capacitor and the inductor, which can ensure that the current flowing through the branch is greater than the main circuit current, so as to ensure the normal work of the inductive load 132. The inductive load module 130 also has a series circuit with multiple resistors in series, which is connected in parallel with the resonance circuit and plays a role in voltage division, so that the current flowing through the inductive load 132 increases, the input voltage of the inductive load 132 increases, and the working efficiency of the inductive load 132 is improved. The relay in the inductive load module 130 is closed, and the inductive load 132 works.

[0064] The voltage is transmitted to the first port 160a of the zero-crossing monitoring module 160 when the resistive load module 120 or the inductive load module 130 works, and the voltage signal transmitted by the first port 160a is divided by a plurality of resistors. The zero-crossing monitoring module 160 is externally connected to a 5V power supply, and the power supply voltage is rectified by a first diode. The externally connected 5V power supply voltage and the voltage transmitted by the load module are connected to the second port of the control module 140 through the output end of a second diode, and the control module 140 can determine whether the optocoupler is turned on. A capacitor is connected in parallel at the second diode to absorb excessive reverse current and prevent the second diode from being damaged by reverse current.

[0065] The first port 170a and the second port 170b of the voltage detection module 170 are respectively connected to the two ends of the receiving module 110, the voltage detection module 170 detects the voltage at the two ends of the receiving module 110 and feeds back the voltage to the control module 140, so as to adjust the voltage of the resistive load module 120 or the inductive load module 130.

[0066] Please refer to Figure 11 , Figure 11 A flowchart of a load switching method provided by the embodiment of the application is shown, which is applied to the load switching circuit described above, and the load switching method comprises steps S210 to S230.

[0067] Step S210: obtaining an instruction signal;

[0068] The user can send an instruction signal to the receiving module through a mobile terminal or a computer terminal.

[0069] Step S220: sending the instruction signal to the control module;

[0070] Step S230: determining a load module corresponding to the instruction signal according to the instruction signal, and selectively controlling the resistive load module or the inductive load module to work.

[0071] The instruction signal contains an instruction of whether the resistive load module or the inductive load module works, the receiving module transmits the instruction signal to the control module, the control module judges the instruction signal, and thus controls the load module corresponding to the instruction signal to work.

[0072] The embodiment of the application specifically controls the load to work through the control module, realizes the integration of various loads of the radio receiving part, and the radio receiving part can orderly work according to the user instruction.

[0073] Please refer to Figure 12 , Figure 12A flow chart of a load switching method provided by an example embodiment of the application is shown.

[0074] When the circuit is not working, the circuit is in standby state, and the battery module communicates with the transmitting end of the control module. When receiving the starting work command of the user, the work command of the user is analyzed to obtain an instruction signal. The instruction signal is transmitted from the transmitting end to the receiving end of the receiving module, and the receiving module transmits the instruction signal. When the zero-crossing signal is found, the thyristor is closed, and the instruction signal is transmitted to the load end. It is judged whether the instruction signal is for the motor to work or for the heating tube to work. If the motor works, the relay REL2 in the inductive load module is closed, and the motor B1 is started to work. If the heating tube works, the relay REL1 in the resistive load module is closed, and the heating tube Res is started to work until the work is finished, and the circuit returns to the standby state again. The receiving module receives the instruction signal and also receives the radio signal at the same time. The radio signal at this time supplies power to the entire circuit and charges the battery module in the circuit to ensure that the circuit can communicate with the transmitting end in the standby state and feedback the work instruction of the user in time.

[0075] Please refer to Figure 13 The application also provides a household device 200, which comprises a device body 210 and the load switching circuit 100 described above, wherein the load switching circuit 100 is arranged on the device body 210.

[0076] The household device can be a household device that needs to detect temperature during work. Optionally, the household device can comprise a blender, a soybean milk machine, a food processor or a mixer.

[0077] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing examples, those skilled in the art will understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent replacements for some technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A load switching circuit, characterized by, The application relates to a load switching circuit. The load switching circuit comprises a receiving module, a control module, a resistive load module and an inductive load module. The receiving module comprises a receiving port and a first port, and the receiving port is used for receiving an instruction signal. The control module comprises a transmitting port and a first port, and the transmitting port of the control module is electrically connected with the receiving port of the receiving module and receives the instruction signal. The resistive load module comprises a first port and a second port, the first port of the resistive load module is connected with the first port of the receiving module, the second port of the resistive load module is connected with the first port of the control module, and the control module controls the resistive load module to work according to the instruction signal. The inductive load module comprises a first port and a second port, the first port of the inductive load module is connected with the first port of the receiving module, the second port of the inductive load module is connected with the first port of the control module, and the control module controls the inductive load module to work according to the instruction signal.

2. The circuit of claim 1, wherein, The inductive load module comprises a rectifier and an inductive load, the rectifier comprises a first port, a second port, a third port and a fourth port, the inductive load comprises a first port and a second port, the first port of the rectifier is connected with the first port of the receiving module, the second port of the rectifier is connected with the first port of the inductive load, the second port of the inductive load is connected with the third port of the rectifier, the fourth port of the rectifier is connected with the first port of the control module, and the rectifier is used for converting the current flowing through the rectifier into the current suitable for the inductive load.

3. The circuit of claim 2, wherein, The inductive load module further comprises a first controller, the first controller comprises a first port and a second port, the first port of the first controller is connected with the second port of the rectifier, the second port of the first controller is connected with the first port of the inductive load, and the first controller controls the inductive load to work.

4. The circuit of claim 1, wherein, The receiving module further comprises a second port, the resistive load module comprises a second controller and a resistive load, the second controller comprises a first port and a second port, the resistive load comprises a first port and a second port, the first port of the second controller is connected with the second port of the receiving module, the second port of the second controller is connected with the first port of the resistive load, the second port of the resistive load is connected with the first port of the control module, and the second controller is used for controlling the resistive load to work.

5. The circuit of claim 1, wherein, The load switching circuit further comprises a master switch module, the master switch module comprises a first port and a second port, the first port of the master switch module is connected with the first port of the receiving module, the second port of the master switch module is connected with the first port of the resistive load module, and the master switch module is used for controlling the circuit to work.

6. The circuit of claim 5, wherein, The receiving module further comprises a second port, the control module further comprises a second port, the load switching circuit further comprises a voltage detection module, the voltage detection module comprises a first port, a second port and a third port, the first port of the voltage detection module is connected with the first port of the receiving module, the second port of the voltage detection module is connected with the second port of the receiving module, and the third port of the voltage detection module is connected with the second port of the control module, and the voltage detection module is used for detecting voltage conditions of the two ports of the receiving module.

7. The circuit of claim 1, wherein, The load switching circuit further comprises a zero-crossing detection module, the zero-crossing detection module comprises a first port and a second port, the first port of the zero-crossing detection module is connected with the second port of the resistive load module, and the second port of the zero-crossing detection module is connected with the first port of the control module, and the zero-crossing detection module is used for detecting whether the circuit works normally.

8. The circuit of claim 1, wherein, The receiving module further comprises a second port, the control module further comprises a second port, the load switching circuit further comprises a voltage detection module, the voltage detection module comprises a first port, a second port and a third port, the first port of the voltage detection module is connected with the first port of the receiving module, the second port of the voltage detection module is connected with the second port of the receiving module, the third port of the voltage detection module is connected with the second port of the control module, and the voltage detection module is used for detecting voltage conditions of the two ports of the receiving module.

9. The circuit of claim 1, wherein, The load switching circuit further comprises a battery module, the battery module is used for supplying power for the load switching circuit, one port of the battery module is grounded, and the battery module is used for supplying power for the whole circuit.

10. A load switching method, characterized by, The method is used for the load switching circuit in any one of claims 1 to 9, and comprises the following steps: obtaining an instruction signal; sending the instruction signal to the control module; determining a load module corresponding to the instruction signal according to the instruction signal, and selectively controlling the resistive load module or the inductive load module to work.

11. A domestic appliance characterized in that The device body and the load switching circuit in any one of claims 1 to 9 are arranged in the device body. ​

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