IH conditioner supporting single-phase and three-phase power supply switching

Abstract

The utility model discloses an IH conditioner supporting single-phase and three-phase power supply switching, and relates to the technical field of IH conditioners, the IH conditioner comprises a power supply module used for supplying power, an IH driving module used for heating, a three-phase under-loss detection module and a single-phase and three-phase power supply switching module; wherein the input end of the three-phase under-loss detection module is connected with the output end of the power supply module, the output end of the three-phase under-loss detection module is connected with the input end of the single-three-phase power supply switching module, and the three-phase under-loss detection module is used for receiving electrical parameter data output by the power supply module and outputting a logic level signal based on the electrical parameter data to the single-three-phase power supply switching module; and the input end of the single-three-phase power supply switching module is connected with the output end of the power supply module, the output end of the single-three-phase power supply switching module is connected with the IH driving module, and the single-three-phase power supply switching module is used for receiving the logic level signal output by the three-phase under-loss detection module and outputting a frequency conversion signal to the IH driving module based on the logic level signal. The method has the beneficial effects that the working reliability of the IH conditioner is improved, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of IH conditioner technology, and more particularly to an IH conditioner that supports single-phase and three-phase power supply switching. Background Technology

[0002] IH (Electromagnetic induction heater) refers to a heating controller manufactured based on the principle of electromagnetic induction heating, such as induction cookers, rice cookers that use electromagnetic heating, and electric pressure cookers.

[0003] In related technologies, such as rice cookers, with the increase in power of large rice cookers and the improvement of power supply technology, three-phase rice cookers have entered the market. However, three-phase rice cookers on the market will shut down and exit the cooking program when a phase is missing. Since almost all customers using three-phase rice cookers are commercial customers, the shutdown of the equipment will cause business difficulties and economic losses for customers. In addition, because the amount of rice they cook is large, the shutdown during the operation of the equipment may also cause rice waste.

[0004] The patent, "An IH Driving Circuit and an IH Heating Circuit and Rice Cooker Using the Same," publication number CN211481490U, published on September 11, 2020, specifically discloses a circuit including a rectifier module, an energy storage module, an AC status detection module, a main control module, a first switch branch, and a second switch branch. The rectifier module is electrically connected to an external AC power supply, the energy storage module, and the IH working module. The detection terminal of the AC status detection module can be electrically connected to the external AC power supply. The main control module is electrically connected to the output terminal of the AC status detection module and the control terminal of the external IH working module. The first switch branch is electrically connected to one pole of the external AC power supply and the first end of the energy storage module. The second switch branch is electrically connected to the energy storage module and the other pole of the external AC power supply. The main control module is electrically connected to the first switch branch and the second switch branch. When the first switch branch and the second switch branch are connected, they can form a power-on circuit with the energy storage module. This scheme uses the opening and closing of the first and second switch branches to release and store energy when the external AC voltage changes, in order to avoid the impact on the IGBT components in the IH working module. However, since the external AC voltage may be low when a phase is missing, the scheme will further divide the voltage when the AC phase is missing, which will ultimately fail to meet the normal operating voltage requirements of the IH and cannot ensure the normal operation of the IH conditioner. Summary of the Invention

[0005] This application addresses the problem in existing IH conditioners where shutdown protection during three-phase power supply anomalies leads to a degraded user experience. It provides an IH conditioner that supports single-phase / three-phase power supply switching. A three-phase power loss detection module outputs high and low logic level signals based on the power supply status detection result. The single-phase / three-phase power supply switching module outputs corresponding frequency conversion signals based on these signals to change the operating mode of the IH drive module. When a phase is missing in the three-phase power supply, the three-phase power loss detection module outputs a low-level logic signal. Upon receiving this low-level logic signal, the single-phase / three-phase power supply switching module outputs a corresponding frequency conversion signal to the IH drive module, causing the IH drive module to adjust to a single-phase power supply operating state. The entire process requires no shutdown for adjustment and can automatically switch to a single-phase / three-phase power supply operating mode while continuing heating, improving the reliability of the IH conditioner and enhancing the user experience.

[0006] To achieve the aforementioned technical objectives, this application provides a technical solution: an IH conditioner supporting single-phase and three-phase power supply switching, comprising: a power supply module for power supply and an IH drive module for heating, further comprising: a three-phase under-loss detection module and a single-phase and three-phase power supply switching module; wherein, the three-phase under-loss detection module has its input terminal connected to the output terminal of the power supply module and its output terminal connected to the input terminal of the single-phase and three-phase power supply switching module, for receiving electrical parameter data output by the power supply module and outputting a logic level signal based on the electrical parameter data to the single-phase and three-phase power supply switching module; the single-phase and three-phase power supply switching module has its input terminal connected to the output terminal of the power supply module and its output terminal connected to the IH drive module, for receiving the logic level signal output by the three-phase under-loss detection module and outputting a frequency conversion signal based on the logic level signal to the IH drive module.

[0007] Furthermore, the three-phase under-loss detection module includes at least a logic switching circuit that switches the state based on electrical parameter data.

[0008] Furthermore, the logic switching circuit includes a transistor Q1, the base of which is connected to the output terminal of the power supply module, the emitter of which is grounded, and the collector of which is connected to the input terminal of the single-phase and three-phase power supply switching module.

[0009] Furthermore, the logic switching circuit also includes a bias resistor R10, one end of which is connected to the base of transistor Q1, and the other end of which is connected to the emitter of transistor Q1.

[0010] Furthermore, the logic switching circuit also includes a diode D3 and a rectifier D4. The anode of the diode D3 is connected to the output terminal of the power module, the cathode of the diode D3 is connected to the cathode of the rectifier D4, and the anode of the rectifier D4 is connected to the base of the transistor Q1.

[0011] Furthermore, the power module includes at least a power conversion protection circuit and a filter circuit. The input terminal of the filter circuit is connected to a three-phase AC power supply, the output terminal of the filter circuit is connected to the input terminal of a three-phase under-loss detection module, the input terminal of the power conversion protection circuit is connected to the output terminal of the filter circuit, and the output terminal of the power conversion protection circuit is connected to the input terminal of a single-phase or three-phase power supply switching module.

[0012] Furthermore, the power conversion protection circuit includes at least two rectifier bridges, D1 and D2, connected in parallel. The input terminals of rectifier bridges D1 and D2 are connected to the output terminal of the filter circuit, and the output terminals of rectifier bridges D1 and D2 are connected to the input terminal of the single-phase and three-phase switching power supply module.

[0013] Furthermore, the filtering circuit includes at least one or more combinations of filter capacitors and filter inductors.

[0014] Furthermore, the IH drive module includes a bottom IH heating circuit and a cover-side heating circuit.

[0015] Furthermore, the single-phase and three-phase power supply switching module includes at least a control chip MCU, which is used to output a frequency converter signal adapted to single-phase operation or a frequency converter signal adapted to three-phase operation to the IH drive module based on the logic level signal output by the three-phase under-loss detection module.

[0016] The beneficial effects of this application are as follows: The three-phase under-loss detection module detects the electrical parameter data output by the power module and outputs the corresponding logic level signal. The single-phase and three-phase switching power supply module performs the switching between single-phase and three-phase power supply modes according to the logic level signal. It automatically switches the power supply mode of the IH drive module in different states of three-phase phase loss power supply, three-phase normal power supply, and single-phase power supply, thereby improving the reliability of the IH conditioner and enhancing the user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the IH conditioner that supports single-phase and three-phase power supply switching in this application.

[0018] Figure 2 This is a schematic diagram of the three-phase under-loss detection module of this application.

[0019] Figure 3 This is a schematic diagram of the power module structure of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely one preferred embodiment of this application and are only used to explain this application. They do not limit the scope of protection of this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] like Figure 1 As shown in the first embodiment of this application, the IH conditioner supporting single-phase and three-phase power supply switching includes:

[0022] A power supply module for power supply and an IH drive module for heating;

[0023] Three-phase under-loss detection module and single-phase / three-phase power supply switching module;

[0024] Among them, the three-phase under-loss detection module has its input end connected to the output end of the power supply module and its output end connected to the input end of the single-three-phase power supply switching module. It is used to receive the electrical parameter data output by the power supply module and output a logic level signal based on the electrical parameter data to the single-three-phase power supply switching module.

[0025] The single-phase and three-phase power supply switching module has its input end connected to the output end of the power supply module and its output end connected to the IH drive module. It is used to receive the logic level signal output by the three-phase under-loss detection module and output the frequency conversion signal to the IH drive module based on the logic level signal.

[0026] In this embodiment, the three-phase under-loss detection module detects the electrical parameter data output by the power module and outputs the corresponding logic level signal. The single-phase and three-phase switching power supply module performs the switching between single-phase and three-phase power supply modes according to the logic level signal. It automatically switches the power supply mode of the IH drive module in different states of three-phase phase loss power supply, three-phase normal power supply, and single-phase power supply, thereby improving the reliability of the IH conditioner and enhancing the user experience.

[0027] Specifically, the three-phase under-loss detection module includes at least a logic switching circuit that switches the state based on electrical parameter data. The input of the logic switching circuit is connected to the output of the power supply module, and the output of the logic switching circuit is connected to the input of the single-phase three-phase power supply switching module. The logic switching circuit switches its own switching state according to the current or voltage output by the power supply module to achieve the output of a logic level signal. The logic switching circuit includes at least one or a combination of transistors and MOSFETs. It is understood that when the logic switching circuit includes any one of transistors and MOSFETs, there is no limitation on the number of transistors or MOSFETs; that is, the logic switching circuit can also include a combination of multiple transistors or multiple MOSFETs. Similarly, when the logic switching circuit includes a combination of transistors and MOSFETs, it can also include a combination of multiple transistors and multiple MOSFETs. In other cases, the logic switching circuit may also include any component or combination thereof that can output different logic level signals based on electrical parameter data, such as photodiodes and optocouplers.

[0028] like Figure 2 As shown, the logic switch circuit includes transistor Q1. The base of transistor Q1 is connected to the output terminal of the power supply module, the emitter of transistor Q1 is grounded, and the collector of transistor Q1 is connected to the input terminal of the single-phase and three-phase power supply switching module.

[0029] In this case, transistor Q1 is an NPN transistor. When the power module input current is greater than or equal to the current threshold, i.e., the base current is greater than or equal to the current threshold, the collector and emitter conduct, the transistor conducts, and the collector outputs a high-level signal. When the power module output current is less than the current threshold, i.e., the base current is less than the current threshold, the collector and emitter do not conduct, the transistor is cut off, and the collector outputs a low-level signal. The logic level signal is output through the conduction and cutoff of transistor Q1 based on the power module input current. In some other cases, transistor Q1 can also be a PNP transistor.

[0030] In this embodiment, when the power module has a normal three-phase input, the input current of the power module turns on transistor Q1, and transistor Q1 outputs a high-level logic signal to the single-phase power supply switching module. At this time, the single-phase power supply switching module outputs the corresponding three-phase power supply frequency conversion signal to the IH drive module, and the IH drive module is in the working state adapted to the three-phase power supply. When the power module suddenly malfunctions, such as a phase failure causing a phase loss, the input current of the power module decreases, transistor Q1 is turned off, and transistor Q1 outputs a low-level logic signal to the single-phase power supply switching module. At this time, the single-phase power supply switching module outputs the corresponding single-phase power supply frequency conversion signal to the IH drive module, and the IH drive module adjusts to the working state adapted to the single-phase power supply. The entire phase loss process does not require stopping the operation of the IH conditioner. The switching between the working mode adapted to the three-phase power supply and the single-phase power supply is performed according to the turn-on and turn-off of transistor Q1. This allows the IH conditioner to automatically switch to the normal operating state supported by the current power supply even in the event of a sudden abnormality in the three-phase current, without human intervention, improving the working reliability of the IH conditioner and enhancing the user experience.

[0031] Specifically, the logic switch circuit also includes a bias resistor R10. One end of the bias resistor R10 is connected to the base of transistor Q1, and the other end is connected to the emitter of transistor Q1. By adjusting the value of the bias resistor R10, a stable voltage divider bias is formed to adjust the bias voltage of transistor Q1. In this embodiment, the bias resistor is set according to the output current when the three-phase power supply is operating normally and the output current when one phase is missing. This ensures that when the power module is in normal three-phase operation, the input current of the power module is greater than or equal to the current threshold, and the logic switch circuit outputs a high-level signal. When the power module is in a single-phase or missing-phase operation state, the input current of the power module is less than or equal to the current threshold, and the logic switch circuit outputs a low-level signal. Simultaneously, the bias resistor R10 pulls the base voltage of transistor Q1 down to ground potential when there is no input voltage, further ensuring that transistor Q1 is reliably cut off when there is no current input, thus ensuring the stability of the circuit.

[0032] In other cases, the logic switching circuit also includes a voltage divider resistor R9, which is connected in parallel with the bias resistor R10. Together with the bias resistor, they form a voltage divider bias to ensure the safe operation of the transistor Q1 while limiting the base current.

[0033] The logic switching circuit also includes diode D3 and rectifier D4. The anode of diode D3 is connected to the output terminal of the power module, the cathode of diode D3 is connected to the cathode of rectifier D4, and the anode of rectifier D4 is connected to the base of transistor Q1.

[0034] Overvoltage protection is provided for the logic switching circuit by using diode D3 and rectifier D4 connected in reverse to prevent damage to other components under overvoltage conditions and improve the safety of the logic switching circuit.

[0035] The logic switch circuit also includes a filter capacitor C4, which is connected in parallel with the bias resistor R10 to remove high-frequency noise from the power module input and ensure the stable operation of the transistor Q1.

[0036] The logic switch circuit also includes a current-limiting resistor R11. One end of the current-limiting resistor R11 is connected to the collector of the transistor Q1, and the other end of the current-limiting resistor R11 is connected to the input terminal of the single-phase and three-phase power supply switching module to limit the output current and ensure the safety of the device.

[0037] The logic switch circuit also includes a protection resistor R8. One end of the protection resistor R8 is connected to the collector of transistor Q1, and the other end of the protection resistor is connected to the digital power supply VDD. It is used to limit the collector current of transistor Q1 and protect transistor Q1 to ensure normal operation.

[0038] In this embodiment, the anode of diode D3 is connected to the output terminal 3PhCk of the power module, the cathode of diode D3 is connected to the cathode of rectifier diode D4, the anode of rectifier diode D4 is connected to the base of transistor Q1, one end of filter capacitor C4 is connected to the cathode of diode D3, and the other end of filter capacitor C4 is grounded, one end of voltage divider resistor R9 is connected to the cathode of rectifier diode D4, and the other end of voltage divider resistor R9 is grounded, one end of bias resistor R10 is connected to the base of transistor Q1, and the other end of bias resistor R10 is grounded, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to one end of protection resistor R8, and the other end of protection resistor R8 is connected to digital power supply VDD, one end of current limiting resistor R11 is connected to the collector of transistor Q1, and the other end of current limiting resistor is connected to the input terminal 3PhOK-MCU_Pin39 of the single-phase and three-phase power supply switching module. The high and low levels output by transistor Q1, depending on whether it is cut off or on under the input electrical parameter data of the power module, enable the detection of single-phase and three-phase power supply.

[0039] The single-phase and three-phase power supply switching module includes at least a control chip MCU, which outputs a frequency converter signal adapted to single-phase operation or a frequency converter signal adapted to three-phase operation to the IH drive module based on the logic level signal output by the three-phase under-loss detection module. This allows the IH drive module to adapt to different power supply states, thereby ensuring that the IH conditioner can still work when there is a phase loss abnormality in the three-phase power supply, improving reliability and user experience.

[0040] As a second embodiment of this application, the power module includes at least a power conversion protection circuit and a filter circuit. The input terminal of the filter circuit is connected to a three-phase AC power supply, the output terminal of the filter circuit is connected to the input terminal of a three-phase under-loss detection module, the input terminal of the power conversion protection circuit is connected to the output terminal of the filter circuit, and the output terminal of the power conversion protection circuit is connected to the input terminal of a single-phase three-phase power supply switching module.

[0041] The three-phase AC power is first filtered and smoothed by a filter circuit to reduce voltage and current fluctuations and noise. Then, the power conversion and protection circuit converts the three-phase AC power into DC power through a bridge rectifier circuit to provide a stable and reliable DC power supply and ensure the stability of the equipment operation.

[0042] like Figure 3 As shown, the power conversion protection circuit includes at least two rectifier bridges, D1 and D2, connected in parallel. The input terminals of rectifier bridges D1 and D2 are connected to the output terminals of the filter circuit, and the output terminals of rectifier bridges D1 and D2 are connected to the input terminals of the single-phase / three-phase switching power supply module. Rectifier bridges D1 and D2 each consist of four diodes and are used to convert three-phase AC power to DC power. The parallel connection of rectifier bridges D1 and D2 improves the current carrying capacity and ensures the reliability of the device.

[0043] The filtering circuit includes at least one or more combinations of filter capacitors and filter inductors. In this embodiment, the filtering circuit includes at least a combination of filter capacitors and filter inductors corresponding to the three phases of the three-phase power supply. By combining the filter inductors and the filtering circuit, the input current of the three-phase power supply is filtered, the input voltage is smoothed, current fluctuations and noise are reduced, and the detection accuracy of the three-phase under-loss detection module and the stability of the DC power supply are further improved.

[0044] The filtering circuit includes: filter capacitors C1, C2, and C3; filter inductors L1, L2, and L3. One end of filter capacitor C1 is connected to phase A of the three-phase power supply, and the other end is connected to phase B. One end of filter capacitor C2 is connected to phase A of the three-phase power supply, and the other end is connected to phase C. One end of filter capacitor C3 is connected to phase B of the three-phase power supply, and the other end is connected to phase C. The input terminal of filter inductor L1 is connected to the connection terminal between filter capacitor C1 and phase A of the three-phase power supply, and the output terminal of filter inductor L1 is connected to the input terminal of the power conversion protection circuit. The input terminal of filter inductor L2 is connected to the connection terminal between filter capacitor C3 and phase B of the three-phase power supply, and the output terminal of filter inductor L2 is connected to the input terminal of the power conversion protection circuit. The input terminal of filter inductor L3 is connected to the connection terminal between filter capacitor C2 and phase C of the three-phase power supply, and the output terminal of filter inductor L3 is connected to the input terminal of the power conversion protection circuit. The effectiveness of filtering is improved by using a three-phase filter structure, which further reduces the impact of single-phase anomalies on the overall device.

[0045] To further improve the safety and speed of capacitor discharge, the filter circuit also includes a discharge resistor R2 connected in parallel to the filter capacitor C1, a discharge resistor R3 connected in parallel to the filter capacitor C2, and a discharge resistor R5 connected in parallel to the filter capacitor C3.

[0046] The power module also includes fuses Fuse1 and Fuse2. The input terminal of fuse Fuse1 is connected to phase A of the three-phase power supply, and its output terminal is connected to the connection between filter capacitor C1 and phase A of the three-phase power supply. The input terminal of fuse Fuse2 is connected to phase C of the three-phase power supply, and its output terminal is connected to the connection between filter capacitor C3 and phase C of the three-phase power supply. When the input current exceeds the rated value of the fuse, the fuse will blow, cutting off the circuit and protecting it from overcurrent damage to other components.

[0047] In this embodiment, the input terminal of the three-phase under-loss detection module is connected to the output terminals of filter inductor L1, filter inductor L2, and filter inductor L3, and is used to obtain the electrical parameter data of the three-phase power supply output, thereby performing three-phase under-loss detection.

[0048] The power supply module also includes protection resistors R1, R4, R6, and R7. The output of the filter inductor L1 is connected to one end of the protection resistor R1, and the other end of the protection resistor R1 is connected to the input of the three-phase under-loss detection module. The input of the rectifier bridge D1 is connected to the connection point between the output of the filter inductor L1 and the protection resistor R1. The output of the rectifier bridge D1 is connected to the input of the single-phase / three-phase power supply switching module. One end of the protection resistor R4 is connected to the input of the three-phase under-loss detection module, and the other end is connected to the input of the single-phase / three-phase power supply switching module. The output of filter inductor L2 is connected to one end of protection resistor R7, and the other end of protection resistor R7 is connected to the input of the three-phase under-loss detection module. The input of rectifier bridge D2 is connected to the connection between the output of filter inductor L2 and protection resistor R7. The output of rectifier bridge D2 is connected to the input of the single-phase and three-phase power supply switching module. The output of filter inductor L3 is connected to one end of protection resistor R6, and the other end of protection resistor R6 is connected to the input of the three-phase under-loss detection module. The input of rectifier bridge D2 is connected to the connection between the output of filter inductor L3 and protection resistor R6.

[0049] In this embodiment, the IH drive module includes a bottom IH heating circuit and a cover-side heating circuit. The operating modes of the bottom IH heating circuit and the cover-side heating circuit are switched according to the single-phase and three-phase power supply switching module to match the corresponding power supply status.

[0050] In other embodiments, the IH conditioner supporting single-phase and three-phase power supply switching also includes a temperature sensor and a basic protection circuit. The temperature sensor monitors the temperature, and the basic protection circuit provides power-off protection to ensure the safety of the IH conditioner by cutting off the power supply when the temperature rises abnormally.

[0051] The specific embodiments described above are preferred embodiments of the IH conditioner that supports single-phase and three-phase power supply switching in this application, and are not intended to limit the specific implementation scope of this application. The scope of this application includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with the shape and structure of this application are within the protection scope of this application.

Claims

1. IH conditioners supporting single-phase and three-phase power supply switching, including: The power supply module for power supply and the IH drive module for heating are characterized in that they further include: Three-phase under-loss detection module and single-phase / three-phase power supply switching module; Among them, the three-phase under-loss detection module has its input end connected to the output end of the power supply module and its output end connected to the input end of the single-three-phase power supply switching module. It is used to receive the electrical parameter data output by the power supply module and output a logic level signal based on the electrical parameter data to the single-three-phase power supply switching module. The single-phase and three-phase power supply switching module has its input end connected to the output end of the power supply module and its output end connected to the IH drive module. It is used to receive the logic level signal output by the three-phase under-loss detection module and output the frequency conversion signal to the IH drive module based on the logic level signal.

2. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 1, characterized in that: The three-phase under-loss detection module includes at least a logic switching circuit that switches the state of the switch based on electrical parameter data.

3. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 2, characterized in that: The logic switch circuit includes a transistor Q1, the base of which is connected to the output of the power module, the emitter of which is grounded, and the collector of which is connected to the input of the single-phase and three-phase power supply switching module.

4. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 3, characterized in that: The logic switch circuit also includes a bias resistor R10, one end of which is connected to the base of transistor Q1, and the other end of which is connected to the emitter of transistor Q1.

5. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 3, characterized in that: The logic switch circuit also includes diode D3 and rectifier D4. The anode of diode D3 is connected to the output terminal of the power module, the cathode of diode D3 is connected to the cathode of rectifier D4, and the anode of rectifier D4 is connected to the base of transistor Q1.

6. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 1, characterized in that: The power module includes at least a power conversion protection circuit and a filter circuit. The input terminal of the filter circuit is connected to a three-phase AC power supply, the output terminal of the filter circuit is connected to the input terminal of a three-phase under-loss detection module, the input terminal of the power conversion protection circuit is connected to the output terminal of the filter circuit, and the output terminal of the power conversion protection circuit is connected to the input terminal of a single-phase or three-phase power supply switching module.

7. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 6, characterized in that: The power conversion protection circuit includes at least two parallel rectifier bridges, D1 and D2. The input terminals of rectifier bridges D1 and D2 are connected to the output terminal of the filter circuit, and the output terminals of rectifier bridges D1 and D2 are connected to the input terminal of the single-phase and three-phase switching power supply module.

8. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 6, characterized in that: The filtering circuit includes at least one or more combinations of filter capacitors and filter inductors.

9. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 1, characterized in that: The IH drive module includes a bottom IH heating circuit and a cover-side heating circuit.

10. The IH conditioner supporting single-phase and three-phase power supply switching as described in claim 1, characterized in that: The single-phase and three-phase power supply switching module includes at least a control chip MCU, which is used to output a frequency conversion signal adapted to single-phase operation or a frequency conversion signal adapted to three-phase operation to the IH drive module based on the logic level signal output by the three-phase under-loss detection module.

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