Temperature power control circuit of commercial electric appliance circuit board
By using temperature detection and temperature difference detection modules, combined with power control and power regulation, the problem of excessively high temperature on the circuit boards of commercial electrical appliances has been solved, achieving the effects of increased safety and extended lifespan.
Patent Information
- Application Number
- CN202520172748.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Existing commercial electrical circuit boards require additional power to dissipate heat when the temperature is too high, and long-term high-power operation reduces their lifespan.
It employs a temperature detection module, a power control module, a trigger control module, a temperature difference detection module, and a power regulation module. Through temperature detection and temperature difference detection, it controls the power output and regulates the power to reduce the circuit board temperature, thereby achieving power failure protection and power regulation.
It improves the operational safety of commercial electrical circuit boards, extends their service life, and reduces power consumption.
Smart Images
Figure CN223883952U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to commercial electric appliance circuit board technical field, concretely is a temperature power control circuit of commercial electric appliance circuit board. BACKGROUND
[0002] Commercial electric appliance circuit board, a kind of through the line and figure of pre-designing be connected with each other electronic component and support electronic component's substrate, with the development of science and technology, people's demand for electronic products is higher and higher, to avoid the temperature of commercial electric appliance circuit board is too high, commercial electric appliance circuit board in the prior art generally uses the way of radiator heat dissipation, reduce the temperature of commercial electric appliance circuit board, not only need additional power consumption for heat dissipation control, and in the case of temperature is too high, commercial electric appliance circuit board is in high-power working state for a long time, it will reduce the service life of commercial electric appliance circuit board, therefore there is to be improved. SUMMARY
[0003] The utility model embodiment provides a kind of temperature power control circuit of commercial electric appliance circuit board, to solve the problem raised in the above background technique.
[0004] To achieve the above object, the utility model provides the following technical scheme:
[0005] A kind of temperature power control circuit of commercial electric appliance circuit board, comprising: power module, temperature detection module, power control module, trigger control module, temperature difference detection module, voltage reduction control module, power regulation module and commercial electric appliance circuit board module;
[0006] Power module is used to step-down, rectification filtering and voltage stabilizing treatment to the incoming commercial power, and output first electric energy;
[0007] Temperature detection module is connected with the power module, for receiving first electric energy and carrying out temperature detection to commercial electric appliance circuit board module, when the temperature signal of detection is greater than the set over-temperature threshold, output power-off signal;
[0008] Power control module is connected with the power module and temperature detection module, for transmitting first electric energy to power regulation module, when receiving power-off signal, stop transmission first electric energy;
[0009] Trigger control module is connected with the temperature detection module, for setting temperature threshold and output trigger signal when temperature signal is greater than temperature threshold;
[0010] Temperature difference detection module is connected with the temperature detection module and trigger control module, for receiving trigger signal, and the difference between temperature signal and temperature threshold is handled by subtraction and output temperature difference signal;
[0011] The voltage reduction control module is connected with the temperature detection module, and is used for outputting a first control signal when the temperature signal is greater than a set first temperature difference threshold value, and outputting a second control signal when the temperature signal is greater than a set second temperature threshold value;
[0012] The power regulation module is connected with the power supply control module and the voltage reduction control module, and is used for regulating and stabilizing the first electric energy to output second electric energy, reducing the output power to output third electric energy when the first control signal is received, and further reducing the output power to output fourth electric energy when the second control signal is received.
[0013] The commercial electric appliance circuit board module is connected with the power regulation module, and is used for transmitting the second electric energy, the third electric energy or the fourth electric energy to the connected commercial electric appliance circuit board.
[0014] As a further scheme of the utility model: the power module includes a power interface, a first transformer, a first rectifier, a first capacitor and a first voltage stabilizing tube; the power supply control module includes a third resistor, a first power tube and a first switch tube;
[0015] Preferably, the first end and the second end of the power interface are connected with the first end and the second end of the primary side of the first transformer respectively, the first end and the second end of the secondary side of the first transformer are connected with the first end and the second end of the first rectifier respectively, the third end of the first rectifier is connected with the cathode of the first voltage stabilizing tube, one end of the first capacitor and the drain of the first power tube, and the gate of the first power tube and the collector of the first switch tube through the third resistor, the emitter of the first switch tube is connected with the anode of the first voltage stabilizing tube, the other end of the first capacitor, the fourth end of the first rectifier and the ground end, the base of the first switch tube is connected with the temperature detection module, and the source of the first power tube is connected with the power regulation module.
[0016] As a further scheme of the utility model: the temperature detection module includes a first thermistor, a first resistor, a second resistor and a first diode;
[0017] Preferably, the first end of the first thermistor is connected with the cathode of the first voltage stabilizing tube, the second end of the first thermistor is connected with one end of the first resistor and the trigger control module and the cathode of the first diode through the second resistor, the anode of the first diode is connected with the base of the first switch tube, and the other end of the first resistor is connected with the anode of the first voltage stabilizing tube.
[0018] As a further scheme of the utility model: the trigger control module includes a first comparator and a voltage threshold device;
[0019] Preferably, the anode of the first comparator is connected with the second end of the first thermistor, the inverting terminal of the first comparator is connected with the voltage threshold device, and the output terminal of the first comparator is connected with the temperature difference detection module.
[0020] As a further scheme of the utility model: the power regulation module includes first voltage stabilizer, second diode, seventh resistor, second capacitor, fourth resistor, fifth resistor, sixth resistor, second switch tube and third switch tube; the commercial electric appliance circuit board module includes commercial electric appliance circuit board interface;
[0021] Preferably, the second end of the first voltage stabilizer is connected with the cathode of the second diode and the source of the first power tube, the third end of the first voltage stabilizer is connected with the anode of the second diode, one end of the second capacitor and the first end of the commercial electric appliance circuit board interface and is connected with the other end of the second capacitor, the first end of the first voltage stabilizer and one end of the fourth resistor through the seventh resistor, the other end of the fourth resistor is connected with the collector of the second switch tube and is connected with the collector of the third switch tube and one end of the sixth resistor through the fifth resistor, the other end of the sixth resistor is connected with the emitter of the third switch tube, the emitter of the second switch tube, the second end of the commercial electric appliance circuit board and the fourth end of the first rectifier, the base of the second switch tube and the base of the third switch tube are connected with the voltage reduction control module.
[0022] As a further scheme of the utility model: the voltage reduction control module includes first potentiometer, fourth diode, eighth resistor and third diode;
[0023] Preferably, the first end of the first potentiometer is connected with the temperature difference detection module, the second end of the first potentiometer and the end of the slide are connected with the cathode of the fourth diode and are connected with the cathode of the third diode through the eighth resistor, the anode of the fourth diode and the anode of the third diode are connected with the base of the third switch tube and the base of the second switch tube respectively.
[0024] As a further scheme of the utility model: the temperature difference detection module includes first analog switch and subtraction device;
[0025] Preferably, the fifth end and the sixth end of the first analog switch are connected with the output end of the first comparator, the third end and the eighth end of the first analog switch are connected with voltage threshold device and the second end of the first thermistor respectively, the fourth end and the ninth end of the first analog switch are connected with the first input end and the second input end of the subtraction device respectively, and the output end of the subtraction device is connected with the first end of the first potentiometer.
[0026] Compared with the prior art, the temperature power control circuit of the commercial electric appliance circuit board has the advantages that the power adjustment module can perform voltage stabilizing adjustment processing on the power transmitted by the power control module, the temperature detection module performs temperature detection and over-temperature detection, the power control module performs power-off protection when the temperature is greater than the temperature threshold set by the trigger control module, the temperature change degree is detected by the temperature difference detection module, the working safety of the commercial electric appliance circuit board connected with the commercial electric appliance circuit board module is improved, the voltage output by the power adjustment module is adjusted according to the temperature change degree, the output power of the power adjustment module is reduced, the working temperature of the commercial electric appliance circuit board is reduced, and the service life of the commercial electric appliance circuit board is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0028] Figure 1 A principle block diagram of a temperature power control circuit of a commercial electric appliance circuit board is provided for the embodiments of the present application.
[0029] Figure 2 A circuit diagram of a temperature power control circuit of a commercial electric appliance circuit board is provided for the embodiments of the present application.
[0030] Figure 3 A connection circuit diagram of a temperature difference detection module is provided for the embodiments of the present application. DETAILED DESCRIPTION
[0031] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0032] In one embodiment, referring to Figure 1 A temperature power control circuit of a commercial electric appliance circuit board, comprising: a power module 1, a temperature detection module 2, a power control module 3, a trigger control module 4, a temperature difference detection module 5, a voltage reduction control module 6, a power adjustment module 7 and a commercial electric appliance circuit board module 8.
[0033] Specifically, the power module 1 is configured to step down, rectify, filter and stabilize the commercial power to output first electric energy;
[0034] The temperature detection module 2 is connected with the power module 1 and configured to receive the first electric energy and detect the temperature of the commercial appliance circuit board module 8. When the detected temperature signal is greater than a set over-temperature threshold, the temperature detection module 2 outputs a power-off signal.
[0035] The power control module 3 is connected with the power module 1 and the temperature detection module 2 and configured to transmit the first electric energy to the power adjustment module 7 and stop transmitting the first electric energy when the power-off signal is received.
[0036] The trigger control module 4 is connected with the temperature detection module 2 and configured to set a temperature threshold and output a trigger signal when the temperature signal is greater than the temperature threshold.
[0037] The temperature difference detection module 5 is connected with the temperature detection module 2 and the trigger control module 4 and configured to perform subtraction processing on the temperature signal and the temperature threshold and output a temperature difference signal when the trigger signal is received.
[0038] The voltage reduction control module 6 is connected with the temperature detection module 2 and configured to output a first control signal when the temperature signal is greater than a set first temperature difference threshold and output a second control signal when the temperature signal is greater than a set second temperature threshold.
[0039] The power adjustment module 7 is connected with the power control module 3 and the voltage reduction control module 6 and configured to stabilize and adjust the first electric energy to output second electric energy, reduce the output power and output third electric energy when the first control signal is received, and further reduce the output power and output fourth electric energy when the second control signal is received.
[0040] The commercial appliance circuit board module 8 is connected with the power adjustment module 7 and configured to transmit the second electric energy, the third electric energy or the fourth electric energy to the connected commercial appliance circuit board.
[0041] In specific embodiments, the power supply module 1 can adopt a power supply circuit composed of a power supply interface, a transformer, a rectifier, etc., can be connected to the mains and can perform voltage reduction, rectification filtering and voltage stabilization processing on the mains; the temperature detection module 2 can adopt a temperature detection circuit composed of a thermistor, a resistor and a diode, can perform temperature detection and over-temperature detection; the power supply control module 3 can adopt a power supply control circuit composed of a field effect tube, a resistor and a triode, can perform power transmission and power-off control; the trigger control module 4 can adopt a trigger control circuit composed of a comparator and a voltage threshold device, can set a temperature threshold, which is less than an over-temperature threshold, and then perform temperature comparison; the temperature difference detection module 5 can adopt a temperature difference detection circuit composed of an analog switch and a subtraction device, can perform signal transmission and calculate the temperature difference when the temperature is greater than the temperature threshold; the voltage reduction control module 6 can adopt a voltage reduction control circuit composed of a potentiometer, a resistor and a diode, can set a first temperature difference threshold and a second temperature difference threshold, the first temperature difference threshold being less than the second temperature difference threshold; the power adjustment module 7 can adopt a power adjustment circuit composed of a voltage stabilizer, a resistor, a capacitor, a triode, etc., can perform voltage stabilization adjustment processing, and is controlled by the voltage reduction control module 6 to perform voltage reduction adjustment; the commercial electric appliance circuit board module 8 can adopt a commercial electric appliance circuit board circuit composed of a commercial electric appliance circuit board interface, and is connected with a commercial electric appliance circuit board.
[0042] In another embodiment, referring to Figure 1 , Figure 2 and Figure 3 , the power supply module 1 includes a power supply interface, a first transformer B1, a first rectifier T1, a first capacitor C1 and a first voltage stabilizing tube VD1; the power supply control module 3 includes a third resistor R3, a first power tube Q1 and a first switch tube V1;
[0043] Specifically, the first end and the second end of the power supply interface are respectively connected to the first end and the second end of the primary side of the first transformer B1, the first end and the second end of the secondary side of the first transformer B1 are respectively connected to the first end and the second end of the first rectifier T1, the third end of the first rectifier T1 is connected to the cathode of the first voltage stabilizing tube VD1, one end of the first capacitor C1 and the drain of the first power tube Q1, and the gate of the first power tube Q1 and the collector of the first switch tube V1 through the third resistor R3, the emitter of the first switch tube V1 is connected to the anode of the first voltage stabilizing tube VD1, the other end of the first capacitor C1, the fourth end of the first rectifier T1 and the ground end, the base of the first switch tube V1 is connected to the temperature detection module 2, and the source of the first power tube Q1 is connected to the power adjustment module 7.
[0044] In specific embodiments, the first power tube Q1 can be selected from N-channel field effect tubes; the first switch tube V1 can be selected from NPN triodes.
[0045] Further, the temperature detection module 2 comprises a first thermistor NTC1, a first resistor R1, a second resistor R2 and a first diode D1;
[0046] Specifically, a first end of the first thermistor NTC1 is connected to a cathode of the first voltage stabilizing tube VD1, a second end of the first thermistor NTC1 is connected to one end of the first resistor R1 and the trigger control module 4 and connected to a cathode of the first diode D1 through the second resistor R2, an anode of the first diode D1 is connected to a base of the first switch tube V1, the other end of the first resistor R1 is connected to an anode of the first voltage stabilizing tube VD1.
[0047] In a specific embodiment, the first thermistor NTC1 can be a negative temperature coefficient thermistor, the second resistor R2 and the first diode D1 set the over-temperature threshold.
[0048] Further, the trigger control module 4 comprises a first comparator A1 and a voltage threshold device;
[0049] Specifically, an anode of the first comparator A1 is connected to the second end of the first thermistor NTC1, an inverting terminal of the first comparator A1 is connected to the voltage threshold device, and an output terminal of the first comparator A1 is connected to the temperature difference detection module 5.
[0050] In a specific embodiment, the first comparator A1 can be an LM358 comparator, and the voltage threshold device can be composed of a reference power supply and a resistor to provide a temperature threshold.
[0051] Further, the power regulation module 7 comprises a first voltage stabilizer IC1, a second diode D2, a seventh resistor R7, a second capacitor C2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second switch tube V2 and a third switch tube V3; the commercial appliance circuit board module 8 comprises a commercial appliance circuit board interface;
[0052] Specifically, a second end of the first voltage stabilizer IC1 is connected to a cathode of the second diode D2 and a source of the first power tube Q1, a third end of the first voltage stabilizer IC1 is connected to an anode of the second diode D2, one end of the second capacitor C2 and a first end of the commercial appliance circuit board interface and connected to the other end of the second capacitor C2 through the seventh resistor R7, a first end of the first voltage stabilizer IC1 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to a collector of the second switch tube V2 and connected to a collector of the third switch tube V3 through the fifth resistor R5 and one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to an emitter of the third switch tube V3, an emitter of the second switch tube V2, a second end of the commercial appliance circuit board and a fourth end of the first rectifier T1, a base of the second switch tube V2 and a base of the third switch tube V3 are connected to the step-down control module 6.
[0053] In specific embodiments, the first voltage stabilizer IC1 can be an LM317 voltage stabilizer; the fourth resistor R4, the seventh resistor R7 and the fifth resistor R5 can adjust the power output by the first voltage stabilizer IC1; the second switch V2 and the third switch V3 can both be NPN triodes, wherein the second switch V2 controls the connection state of the fifth resistor R5 and the sixth resistor R6, and the third switch V3 controls the connection state of the sixth switch.
[0054] Further, the voltage reduction control module 6 comprises a first potentiometer RP1, a fourth diode D4, an eighth resistor R8 and a third diode D3.
[0055] Specifically, the first end of the first potentiometer RP1 is connected to the temperature difference detection module 5, the second end and the slide end of the first potentiometer RP1 are both connected to the cathode of the fourth diode D4 and through the eighth resistor R8 to the cathode of the third diode D3, the anode of the fourth diode D4 and the anode of the third diode D3 are respectively connected to the base of the third switch V3 and the base of the second switch V2.
[0056] In specific embodiments, the first potentiometer RP1 and the fourth diode D4 set the first voltage threshold; the first potentiometer RP1, the eighth resistor R8 and the third diode D3 set the second voltage threshold.
[0057] Further, the temperature difference detection module 5 comprises a first analog switch IC2 and a subtraction device.
[0058] Specifically, the fifth end and the sixth end of the first analog switch IC2 are both connected to the output end of the first comparator A1, the third end and the eighth end of the first analog switch IC2 are respectively connected to the voltage threshold device and the second end of the first thermistor NTC1, the fourth end and the ninth end of the first analog switch IC2 are respectively connected to the first input end and the second input end of the subtraction device, and the output end of the subtraction device is connected to the first end of the first potentiometer RP1.
[0059] In specific embodiments, the first analog switch IC2 can be a CD4066 chip; the subtraction device can be composed of an operational amplifier and a resistor, which performs subtraction processing on the input signal, specifically, the signal voltage of the second input end of the subtraction device will be subtracted from the signal voltage of the first input end.
[0060] The temperature power control circuit of the commercial electric appliance circuit board in this embodiment, the commercial power is accessed by the power interface, the first transformer B1, the first rectifier T1, the first capacitor C1 and the first voltage stabilizing tube VD1 carry out the voltage reduction, rectification filtering and voltage stabilizing processing, output the first electric energy, the first electric energy is transmitted to the first voltage stabilizer IC1 through the first power tube Q1, the first voltage stabilizing tube VD1 cooperates with the seventh resistor R7, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the second capacitor C2 to carry out the voltage stabilizing adjustment processing, output the second electric energy, at the same time, the first thermistor NTC1 and the first resistor R1 carry out the temperature detection, when the detected temperature signal is greater than the over-temperature threshold value set by the second resistor R2 and the first diode D1, the first diode D1 is broken down, the first switch tube V1 is turned on, the first power tube Q1 will be powered off, if the temperature signal is only greater than the temperature threshold value set by the voltage threshold device, the first comparator A1 will control the third end and the fourth end of the first analog switch IC2, the eighth end and the ninth end are turned on, then the temperature signal and the temperature threshold value are subtracted by the subtraction device, the temperature difference signal is output, then the temperature change degree is obtained, when the temperature difference signal is greater than the first temperature difference threshold value set by the first potentiometer RP1 and the fourth diode D4, the fourth diode D4 is broken down, the third switch tube V3 is turned on, at this time, the electric energy output by the first voltage stabilizing tube VD1 is adjusted by the fourth resistor R4 and the fifth resistor R5 and the third electric energy is output, if the temperature difference signal is greater than the second temperature difference threshold value set by the first potentiometer RP1, the third diode D3 and the eighth resistor R8, the third diode D3 is broken down, the second switch tube V2 is turned on, the electric energy output by the first voltage stabilizing tube VD1 is adjusted by the drop resistance and the fourth electric energy is output, the fourth electric energy is less than the third electric energy, less than the second electric energy and the fourth electric energy is the minimum working voltage required by the commercial electric appliance circuit board, the second electric energy, the third electric energy or the fourth electric energy is transmitted to the commercial electric appliance circuit board connected by the commercial electric appliance circuit board interface of the commercial electric appliance circuit board.
[0061] It is obvious to a person skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.
[0062] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.
Claims
1. A temperature power control circuit of a commercial electric appliance circuit board, characterized in that, the temperature power control circuit of the commercial electric appliance circuit board comprises a power supply module, a temperature detection module, a power supply control module, a trigger control module, a temperature difference detection module, a voltage reduction control module, a power adjustment module and a commercial electric appliance circuit board module; the power supply module is configured to reduce, rectify, filter and stabilize the mains power to output first electric energy; the temperature detection module is connected with the power supply module and configured to receive the first electric energy and detect the temperature of the commercial electric appliance circuit board module, and output a power-off signal when the detected temperature signal is greater than a set over-temperature threshold; the power supply control module is connected with the power supply module and the temperature detection module, and configured to transmit the first electric energy to the power adjustment module and stop transmitting the first electric energy when the power-off signal is received; the trigger control module is connected with the temperature detection module, and configured to set a temperature threshold and output a trigger signal when the temperature signal is greater than the temperature threshold; the temperature difference detection module is connected with the temperature detection module and the trigger control module, and configured to perform subtraction on the temperature signal and the temperature threshold and output a temperature difference signal when the trigger signal is received; the voltage reduction control module is connected with the temperature detection module, and configured to output a first control signal when the temperature signal is greater than a set first temperature difference threshold, and output a second control signal when the temperature signal is greater than a set second temperature threshold; the power adjustment module is connected with the power supply control module and the voltage reduction control module, and configured to stabilize and adjust the first electric energy to output second electric energy, reduce the output power to output third electric energy when the first control signal is received, and further reduce the output power to output fourth electric energy when the second control signal is received; the commercial electric appliance circuit board module is connected with the power adjustment module, and configured to transmit the second electric energy, the third electric energy or the fourth electric energy to the connected commercial electric appliance circuit board.
2. The temperature power control circuit for a circuit board of a commercial electric appliance according to claim 1, wherein the power supply module comprises a power supply interface, a first transformer, a first rectifier, a first capacitor and a first voltage stabilizing tube; the power supply control module comprises a third resistor, a first power tube and a first switch tube; the first end and the second end of the power supply interface are connected with the first end and the second end of the primary side of the first transformer, the first end and the second end of the secondary side of the first transformer are connected with the first end and the second end of the first rectifier, the third end of the first rectifier is connected with the cathode of the first voltage stabilizing tube, one end of the first capacitor and the drain of the first power tube, and the gate of the first power tube and the collector of the first switch tube through the third resistor, the emitter of the first switch tube is connected with the anode of the first voltage stabilizing tube, the other end of the first capacitor, the fourth end of the first rectifier and the ground end, the base of the first switch tube is connected with the temperature detection module, and the source of the first power tube is connected with the power adjustment module.
3. The temperature power control circuit for a commercial electric appliance circuit board according to claim 2, wherein the temperature detection module comprises a first thermistor, a first resistor, a second resistor and a first diode; The first end of the first thermistor is connected to the cathode of the first voltage stabilizing tube, the second end of the first thermistor is connected to one end of the first resistor and the trigger control module and is connected to the cathode of the first diode through the second resistor, the anode of the first diode is connected to the base of the first switch tube, and the other end of the first resistor is connected to the anode of the first voltage stabilizing tube.
4. The temperature power control circuit for a commercial electric appliance circuit board according to claim 3, wherein The trigger control module comprises a first comparator and a voltage threshold device. The anode of the first comparator is connected to the second end of the first thermistor, the inverting terminal of the first comparator is connected to the voltage threshold device, and the output terminal of the first comparator is connected to the temperature difference detection module.
5. The temperature power control circuit for a commercial electric appliance circuit board according to claim 4, wherein The power regulation module comprises a first voltage stabilizer, a second diode, a seventh resistor, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a second switch tube and a third switch tube; and the commercial electric appliance circuit board module comprises a commercial electric appliance circuit board interface. The second end of the first voltage stabilizer is connected to the cathode of the second diode and the source of the first power tube, the third end of the first voltage stabilizer is connected to the anode of the second diode, one end of the second capacitor and the first end of the commercial electric appliance circuit board interface and is connected to the other end of the second capacitor through the seventh resistor, the first end of the first voltage stabilizer and one end of the fourth resistor, the other end of the fourth resistor is connected to the collector of the second switch tube and is connected to the collector of the third switch tube and one end of the sixth resistor through the fifth resistor, the other end of the sixth resistor is connected to the emitter of the third switch tube, the emitter of the second switch tube, the second end of the commercial electric appliance circuit board and the fourth end of the first rectifier, and the base of the second switch tube and the base of the third switch tube are connected to the step-down control module.
6. The temperature power control circuit for a commercial electric appliance circuit board according to claim 5, wherein The step-down control module comprises a first potentiometer, a fourth diode, an eighth resistor and a third diode. The first end of the first potentiometer is connected to the temperature difference detection module, the second end of the first potentiometer and the wiper end are both connected to the cathode of the fourth diode and are connected to the cathode of the third diode through the eighth resistor, and the anode of the fourth diode and the anode of the third diode are respectively connected to the base of the third switch tube and the base of the second switch tube.
7. A temperature power control circuit for a commercial electric appliance circuit board according to claim 6, wherein The temperature difference detection module comprises a first analog switch and a subtraction device. The fifth end and the sixth end of the first analog switch are both connected to the output terminal of the first comparator, the third end and the eighth end of the first analog switch are respectively connected to the voltage threshold device and the second end of the first thermistor, the fourth end and the ninth end of the first analog switch are respectively connected to the first input terminal and the second input terminal of the subtraction device, and the output terminal of the subtraction device is connected to the first end of the first potentiometer.