CN112054718A - A thermoelectric power generation cooker power supply system and charging management method thereof - Google Patents

Abstract

The invention provides a thermoelectric power generation cooker power supply system and a charging management method thereof. The system includes a cooker main body, and the cooker main body is provided with a thermoelectric power generation unit, a battery box for power supply and ignition, and a charging device connected to the thermoelectric power generation unit and the battery box. The management module, and the pulse ignition module connected to the battery box, the thermoelectric power generation unit is installed on the temperature rise part of the main body of the gas stove, and is used to convert thermal energy into electric energy according to the temperature difference signal of the temperature rise part, and the generated electric energy is used for the battery box. Charging, the charging management module is used to control the positive charging of the battery box, and control the thermoelectric generating unit to stop working or cut off the charging circuit when it is detected that the battery box is fully charged. The method of the present invention uses the above-mentioned system for charging management. The invention utilizes the heat released during the combustion process of the gas stove for charging, does not need to replace the battery frequently, can be used cyclically and ensures safe use.

Description

A thermoelectric power generation cooker power supply system and charging management method thereof

technical field

The invention relates to the technical field of domestic gas cookers, in particular to a cooker power supply system with thermoelectric power generation and a charging management method applied to the system.

Background technique

Thermoelectric power generation directly converts thermal energy into electrical energy according to the Seebeck effect. Semiconductor thermoelectric power generation sheets can be used for various waste heat recycling due to their advantages of no noise, no pollution, no wear, light weight and long service life. But for a long time, due to the restriction of thermoelectric conversion efficiency and cost, thermoelectric power generation technology is mainly used in cutting-edge fields such as aerospace and military. In recent years, the emergence of a number of high-performance thermoelectric conversion materials has provided the possibility for the application of thermoelectric power generation technology in industrial and civil industries.

Gas stoves are commonly used kitchen equipment. The control devices of gas stoves and electrical components such as ignition needles are usually powered by dry batteries or alkaline batteries. Due to the short lifespan of dry batteries or alkaline batteries, the batteries need to be replaced frequently, which is inconvenient for users to use. At the same time, the gas stove releases a lot of heat during the combustion process, of which about 40% of the heat is taken away by the flue gas and directly wasted for heat dissipation.

In addition, the battery power is limited, so when the battery power of the gas stove is lower than a certain value after a period of use, the ignition and other functions of the gas stove cannot work normally. Therefore, the user needs to replace the battery frequently during the use of the gas stove. On the one hand, Increase the cost of use, on the other hand, the improper recycling of the replaced battery will also cause pollution to the environment, so it is very necessary to improve the power supply structure of the gas stove.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a cooker power supply system that utilizes the heat released by the combustion process of the gas cooker for charging, and does not need to replace the battery frequently, and can be recycled and used to ensure safe use of thermoelectric power generation.

Another object of the present invention is to provide a charging management method for a cooktop power supply system that utilizes the heat released during the combustion process of a gas cooker, does not require frequent battery replacement, can be recycled and ensures safe use of thermoelectric power generation.

In order to achieve the above-mentioned main purpose, the present invention provides a thermoelectric power generation cooker power supply system, which includes a cooker main body, and the cooker main body is provided with a thermoelectric power generation unit, a battery box for power supply and ignition, and a thermoelectric power generation unit. , a charging management module connected to the battery box, and a pulse ignition module connected to the battery box, the thermoelectric power generation unit is installed on the temperature rise component of the main body of the gas cooker, and is used for The temperature difference signal converts thermal energy into electrical energy, and the battery box is charged by the generated electrical energy. The charging management module is used to control the forward charging of the battery box, and control the battery box when it is detected that the battery box is fully charged. The thermoelectric power generation unit stops working or cuts off the charging circuit.

In a further solution, at least one of the temperature rise components of the main body of the gas cooker is installed with the thermoelectric power generation unit, and the temperature rise component is a fire cover, a combustion plate or other components on the burner head of the main body of the gas stove. Parts that have a temperature rise when the stove is working.

In a further solution, the thermoelectric power generation unit includes a thermoelectric power generation module and a boost constant current module connected in series with each other.

In a further solution, the thermoelectric power generation module includes a heat conduction surface, a heat dissipation surface and a thermoelectric power generation sheet, and the thermoelectric power generation sheet is sandwiched between the heat conduction surface and the heat dissipation surface.

In a further solution, the boost constant current module includes a first boost chip and a second boost chip, and the input end of the first boost chip and the input end of the second boost chip are in sequence. A first inductor, a first filter capacitor, a second filter capacitor and a second inductor are connected, the first filter capacitor is connected in parallel with the second filter capacitor and connected to the power input terminal, and the output of the first boost chip The terminal is connected to the output terminal of the first power supply, and the output terminal of the second boost chip is connected to the output terminal of the second power supply.

In a further solution, the charging management module includes a charging management chip, a first triode, a first field effect transistor, a current limiting resistor, and a charging indicator light, and the first pin of the charging management chip is connected to the The base of the first transistor, the collector of the first transistor is connected to the gate of the first field effect transistor, and the source of the first field effect transistor is connected to the current limiting resistor The power supply end of the battery box.

In a further solution, the battery box is connected to the pulse ignition module for continuously supplying power to the pulse ignition module.

In a further solution, the battery box is connected to the charging management module for storing the electric energy output by the charging management module, and the stored electric energy is limited to a preset rated voltage value for the internal circuit of the cooker. use.

In order to achieve the above-mentioned other object, the present invention provides a charging management method for a cooktop power supply system with thermoelectric power generation. : The heat conduction surface of the thermoelectric power generation module is in contact with the components that have a temperature rise when the gas stove is burned. When the gas stove is ignited, the flame heat of the gas stove is transferred to the stove surface, and the temperature of the stove surface rises, which is absorbed by the heat conduction surface of the thermoelectric power generation module. When the gas stove is working, the heat around the temperature-rising components generates a temperature difference between the heat-conducting surface and the heat-dissipating surface of the thermoelectric power generation module. The heat-conducting surface of the thermoelectric power generation module transfers heat to the thermoelectric power generation sheet, and generates an output voltage through the Seebeck effect. The output voltage of the thermoelectric generator is boosted and stabilized by the boost constant current module, and then the charging voltage is output to charge the battery box. The charging management module controls the forward charging of the battery box, and detects the charging voltage in the battery box as feedback in real time. When it is detected that the battery box is fully charged, the thermoelectric generating unit is controlled to stop working or cut off the charging circuit.

A further solution is that the charging management module monitors the power status of the battery box in real time, and when the battery box is in the charging state, the charging indicator light is activated to indicate the charging status; when the battery box is fully charged, the charging management module Control to cut off the charging circuit and turn off the charging indicator light to indicate the fully charged state.

A further solution is that when the low voltage of the thermoelectric power generation module is raised to the charging voltage by the boost constant current module, the output voltage is sent to the charging management chip, so that the charging management chip enters the normal operation state, and the voltage state of the battery in the battery box is judged. If the battery voltage is lower than the preset threshold, it is judged to be in a power-deficient state, and the control signal output pin of the charging management chip outputs a high level to the base of the first switch, and the first transistor and the first field effect transistor are both conductive. When the charging circuit is turned on, the control charging circuit is normally turned on, and the charging management chip controls the forward charging of the battery box, and at the same time flashes the charging indicator light to indicate that the battery box is in the charging state. The magnitude of the voltage difference is used as the basis for judging whether the charging condition has been reached.

A further solution is that if the battery voltage is greater than the preset threshold, it is judged as a fully charged state, the control signal output pin of the charging management chip has no output, the first transistor and the first field effect transistor are all turned off, and the control is cut off. The charging circuit, and the charging indicator light is always on to indicate that the battery box is fully charged.

A further solution is that when the current value of the charging circuit exceeds the preset threshold, it can be determined that the charging circuit is overloaded, the control signal output pin of the charging management chip outputs a low level, the first transistor is turned off, and the charging is controlled to be cut off. loop.

A further solution is that when a large current or voltage is required, multiple thermoelectric power generation sheets can be installed on the temperature rise part of the main body of the gas stove. way to connect.

It can be seen from this that in the present invention, a thermoelectric power generation module is installed on or near the fire cover/combustion plate of the household gas cooker, and the heat generated by the combustion is used to heat the heat conduction surface of the semiconductor thermoelectric power generation sheet, so that the semiconductor thermoelectricity can be generated. The temperature difference between the two ends of the chip generates a voltage, and the electric energy provided by the thermoelectric power generation chip is passed through the booster circuit to increase the electric energy voltage to meet the safety voltage of the energy storage battery and the working voltage of the charging management module. The rechargeable battery in the box is charged, and the rechargeable battery supplies power to the control system of the household gas cooker, compensates the battery power consumed by the gas cooker during operation, and achieves the purpose of eliminating the need to replace the battery. problem.

In addition, the charging management chip monitors the power status of the battery in real time during charging. When charging, the charging indicator is activated to inform the user that the battery box is in a charging state; when the battery is fully charged, the charging circuit is automatically cut off and the charging indicator is turned off at the same time. Inform the user that the battery is fully charged at this time.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of a cooker power supply system for thermoelectric power generation according to the present invention.

FIG. 2 is a circuit schematic diagram of a boost constant current module in an embodiment of a thermoelectric power generation cooker power supply system according to the present invention.

Fig. 3 is a circuit schematic diagram of a boost constant current module of a second thermoelectric power generation unit in an embodiment of a thermoelectric power generation cooker power supply system of the present invention.

FIG. 4 is a circuit schematic diagram of a charging management module in an embodiment of a cooker power supply system with thermoelectric power generation according to the present invention.

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Detailed ways

An embodiment of a cooker power supply system for thermoelectric power generation:

Referring to FIG. 1 , the thermoelectric power generation cooker power supply system of the present invention includes a cooker main body, and the cooker main body is provided with a thermoelectric power generation unit 10 , a battery box 20 for power supply and ignition, and a charging management module connected to the thermoelectric power generation unit 10 and the battery box 20 . 30, and the pulse ignition module 40 connected to the battery box 20, the thermoelectric power generation unit 10 is installed on the temperature rise component 100 of the main body of the gas stove, and is used to convert thermal energy into electrical energy according to the temperature difference signal of the temperature rise component 100, and the electrical energy generated by To charge the battery box 20, the charging management module 30 is used to control the battery box 20 to charge forward, and control the thermoelectric generating unit 10 to stop working or cut off the charging circuit when it is detected that the battery box 20 is fully charged.

In this embodiment, at least one temperature rise component 100 of the main body of the gas stove is installed with a thermoelectric power generation unit 10, and the temperature rise component 100 is a fire cover, a combustion plate on the burner head of the main body of the gas stove, or any other temperature rise component that has a temperature rise when the gas stove is working. on the parts. For example, one or more thermoelectric power generation units 10 are installed on or near the left combustion plate of the gas stove, and one or more thermoelectric power generation units 10 are installed on or near the right combustion plate of the gas stove, such as installed on the left combustion plate of the gas stove The first thermoelectric power generation unit 10 on the pan and the second thermoelectric power generation unit 10 installed on the right combustion pan of the gas stove.

In this embodiment, the thermoelectric power generation unit 10 includes a thermoelectric power generation module 11 and a boost constant current module 12 connected in series. The thermoelectric power generation module 11 includes a heat conduction surface, a heat dissipation surface and a thermoelectric power generation sheet, and the thermoelectric power generation sheet is sandwiched between the heat conduction surface and the heat dissipation surface. Preferably, the thermoelectric power generation sheet is a semiconductor thermoelectric power generation sheet. It can be seen that by configuring the semiconductor thermoelectric power generation sheet, when the temperature on both sides of the semiconductor thermoelectric power generation sheet has a certain difference, a current will be generated in the circuit loop, but the voltage corresponding to the current is low, which is not suitable for charging the battery module. Therefore, after the semiconductor thermoelectric power generation unit 10 is equipped with a corresponding boost constant current module 12, the voltage output by the boost constant current module 12 is suitable for charging the battery and the current is relatively stable.

Of course, the semiconductor thermoelectric power generation sheet can be installed on the stove surface of the gas stove, and the semiconductor thermoelectric power generation sheet 3 can be installed on the parts that have a large temperature rise when the gas stove is working. The parts with a large temperature rise can be but not limited to Cooktops, stove heads, etc., all belong to the protection scope of the present invention.

Referring to FIG. 2 , the boosting constant current module 12 includes a first boosting chip IC1 and a second boosting chip IC2, and a second boosting chip IC2 is connected between the input end of the first boosting chip IC1 and the input end of the second boosting chip IC2 in sequence. An inductor L1, a first filter capacitor C1, a second filter capacitor E1 and a second inductor L2, the first filter capacitor C1 and the second filter capacitor E1 are connected in parallel and connected to the power input terminal VIN, and the output terminal of the first boost chip IC1 It is connected to the first power output terminal VDD1, and the output terminal of the second boost chip IC2 is connected to the second power output terminal VDD.

The circuit structures of the first thermoelectric power generation unit and the second thermoelectric power generation unit in this embodiment are the same, except that the boost constant current module 12 is independent, and the boost constant current module of the second thermoelectric power generation unit includes filter capacitors E3, C4, inductors L2, L4 and boost chips IC3, IC4, as shown in Figure 3.

Referring to FIG. 4 , the charging management module 30 includes a charging management chip U1, a first transistor Q1, a first field effect transistor Q2, a current limiting resistor R1, and a charging indicator LED1. The first pin of the charging management chip U1 is connected to the first pin of the charging management chip U1. The base of a transistor Q1, the collector of the first transistor Q1 is connected to the gate of the first field effect transistor Q2, and the source of the first field effect transistor Q2 is connected to the battery box 20 through the current limiting resistor R1 power supply. Preferably, the charge management chip U1 is an R5F1026A microcontroller.

In this embodiment, the battery box 20 is connected to the charging management module 30 for storing the electric energy output by the charging management module 30, and the stored electric energy is limited to a preset rated voltage value for use by the internal circuit of the cooker. The battery box 20 is connected to the pulse ignition module 40 for continuously supplying power to the pulse ignition module 40 . The pulse ignition module 40 is a pulse igniter, and the charge management module 30 can control the discharge of the pulse igniter, control the opening and closing of the pulse igniter, and use the pulse igniter to ignite the gas in the cooker.

In practical applications, the low voltage of the thermoelectric power generation module 11 is boosted to a voltage of 3.3V through the filter capacitors E1, C1, inductors L1, L3 and boost chips IC1, IC2, and the boosted voltage of the first boost chip IC1 is provided to The charging management chip U1 makes the charging management chip U1 enter the normal operation state. At this time, the charging management chip U1 judges the voltage state of the connected battery. For example, when the battery voltage is greater than 2.7V, it is judged to be a fully charged state, and pin 20 of the chip has no output. The first transistor Q1 is not turned on, the first FET Q2 is not turned on, the boosted voltage does not charge the battery, and at the same time, the charging indicator LED1 is always on to inform the user that the battery is fully charged; for example, the battery voltage If it is less than 2.4V, it is judged to be in a power-deficient state, pin 20 of the chip outputs a high level, the first transistor Q1 is turned on, and the first field effect transistor Q2 is also turned on, and the boosted voltage passes through the current limiting resistor R1 to the battery. At the same time, the charging indicator LED1 flashes to inform the user that the battery is in a state of lack of power, and the battery is being charged; If the battery voltage is lower than 2.4V, it will enter the charging state.

It can be seen that, in the present invention, a thermoelectric power generation module 11 is installed on or near the fire cover/combustion plate of the household gas cooker, and the heat generated by the combustion is used to heat the heat conduction surface of the semiconductor thermoelectric generation sheet, so that the temperature difference between the semiconductors is increased. A temperature difference is formed between the two ends of the power generation sheet to generate a voltage, and the electric energy provided by the thermoelectric power generation sheet is passed through the booster circuit, and the voltage of the electric energy is increased to a safe voltage that can meet the safety voltage of the energy storage battery and the working voltage of the charging management module 30. After the charging management module 30 charges the rechargeable battery in the battery box 20, the rechargeable battery supplies power to the control system of the household gas cooker, compensates the battery power consumed by the gas cooker when working, achieves the purpose of not needing to replace the battery, and solves the need for the existing gas cooker in the use process. The difficulty of changing batteries frequently.

In addition, the charging management chip U1 monitors the power status of the battery during charging in real time. When charging, the charging indicator light is activated to inform the user that the battery box 20 is in a charging status; when the battery power reaches a fully charged status, the charging circuit is automatically cut off, and the charging indicator is turned off at the same time. light to inform the user that the battery is fully charged at this time.

An embodiment of a charging management method for a cooker power supply system with thermoelectric power generation:

A charging management method for a thermoelectric power generation cooker power supply system, which is applied to the above-mentioned thermoelectric power generation cooker power supply system. The method of the present invention includes that the heat conduction surface of the thermoelectric power generation module 11 is in contact with a component that has a temperature rise when the gas stove burns. After the stove is ignited, the flame heat of the gas stove is transferred to the stove surface, and the temperature of the stove surface rises. A temperature difference is generated between the heat sink and the heat dissipation surface, and the heat transfer surface of the thermoelectric power generation module 11 transfers heat to the thermoelectric power generation sheet, and generates an output voltage through the Seebeck effect. The output voltage of the thermoelectric power generation sheet is boosted and stabilized by the boost constant current module 12. After pressing, the charging voltage is output to charge the battery box 20, and the charging management module 30 controls the battery box 20 to charge forward, and detects the charging voltage in the battery box 20 in real time as feedback, and controls the thermoelectric power generation unit when it is detected that the battery box 20 is fully charged. 10 Stop working or cut off the charging circuit.

Further, the charging management module 30 monitors the power state of the battery box 20 in real time when charging, and when the battery box 20 is in the charging state, the charging indicator light is activated to indicate the charging state; when the battery box 20 is fully charged, the charging The management module 30 controls to cut off the charging circuit, and at the same time turns off the charging indicator light to indicate a fully charged state.

Further, after the low voltage of the thermoelectric power generation module 11 is increased to the charging voltage by the boosting constant current module 12, the output voltage is sent to the charging management chip U1, so that the charging management chip U1 enters the normal operation state, and the voltage of the battery in the battery box 20 is judged. If the battery voltage is less than the preset threshold, it is judged as a power-deficient state, and the control signal output pin of the charging management chip U1 outputs a high level to the base of the first switch, the first transistor, the first field effect The tubes are all turned on, the control charging circuit is normally turned on, the charging management chip U1 controls the battery box 20 to charge forward, and the charging indicator flashes at the same time to indicate that the battery box 20 is in a charging state. The voltage difference between the voltage constant current module 12 and the battery is used as the basis for judging whether the charging condition has been reached.

Further, if the battery voltage is greater than the preset threshold, it is judged as a fully charged state, the control signal output pin of the charging management chip U1 has no output, the first transistor and the first field effect transistor are both turned off, and the charging circuit is controlled to be cut off. , and the charging indicator light is always on to indicate that the battery box 20 is fully charged.

Further, when the current value of the charging circuit exceeds the preset threshold, it can be determined that the charging circuit is overloaded, the charging management chip U1 controls the signal output pin to output a low level, the first transistor is turned off, and the charging circuit is controlled to be cut off.

Further, when a larger current or voltage is required, a plurality of thermoelectric power generation sheets can be installed on the temperature rise component 100 of the main body of the gas stove. connect.

It can be seen that, in the present invention, a thermoelectric power generation module 11 is installed on or near the fire cover/combustion plate of the household gas cooker, and the heat generated by the combustion is used to heat the heat conduction surface of the semiconductor thermoelectric generation sheet, so that the temperature difference between the semiconductors is increased. A temperature difference is formed between the two ends of the power generation sheet to generate a voltage, and the electric energy provided by the thermoelectric power generation sheet is passed through the booster circuit, and the voltage of the electric energy is increased to a safe voltage that can meet the safety voltage of the energy storage battery and the working voltage of the charging management module 30. After the charging management module 30 charges the rechargeable battery in the battery box 20, the rechargeable battery supplies power to the control system of the household gas cooker, compensates the battery power consumed by the gas cooker when working, achieves the purpose of not needing to replace the battery, and solves the need for the existing gas cooker in the use process. The difficulty of changing batteries frequently.

In addition, the charging management chip U1 monitors the power status of the battery during charging in real time. When charging, the charging indicator light is activated to inform the user that the battery box 20 is in a charging status; when the battery power reaches a fully charged status, the charging circuit is automatically cut off, and the charging indicator is turned off at the same time. light to inform the user that the battery is fully charged at this time.

It should be noted that the above are only the preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-substantial modification made to the present invention by using this concept also falls within the protection scope of the present invention. Inside.

Claims (14)

1. The utility model provides a thermoelectric generation's cooking utensils electrical power generating system, includes the cooking utensils main part, its characterized in that:

the kitchen range is provided with thermoelectric generation unit in the main part of the kitchen range, be used for supplying power the battery case of ignition, with thermoelectric generation unit the management module that charges that the battery case is connected and with the pulse ignition module that the battery case is connected, thermoelectric generation unit installs on the temperature rise part of gas stove main part, be used for the basis the temperature difference signal of temperature rise part converts heat energy into electric energy, and is right through the electric energy that produces the battery case charges, it is used for controlling to charge the management module the battery case is forward to charge, and is detecting control when the battery case electric quantity is full of thermoelectric generation unit stop work or cut off the return circuit that charges.

2. The cooktop power system of claim 1, wherein:

the temperature difference power generation unit is installed to at least one temperature rise part of gas stove main part, the temperature rise part is on fire lid, the burning dish or other parts that have the temperature rise when the gas stove works on the gas stove main part furnace end.

3. The cooktop power system of claim 1, wherein:

the temperature difference power generation unit comprises a temperature difference power generation module and a boosting constant-current module which are connected in series.

4. The cooktop power system of claim 3, wherein:

the thermoelectric generation module comprises a heat conduction surface, a heat dissipation surface and thermoelectric generation pieces, wherein the thermoelectric generation pieces are arranged between the heat conduction surface and the heat dissipation surface in a clamping mode.

5. The cooktop power system of claim 3, wherein:

the boost constant-current module comprises a first boost chip and a second boost chip, wherein a first inductor, a first filter capacitor, a second filter capacitor and a second inductor are sequentially connected between the input end of the first boost chip and the input end of the second boost chip, the first filter capacitor and the second filter capacitor are connected in parallel and are connected with the input end of the power supply, the output end of the first boost chip is connected with the output end of the first power supply, and the output end of the second boost chip is connected with the output end of the second power supply.

6. Hob power supply system according to any one of claims 1 to 5, characterized in that:

the charging management module comprises a charging management chip, a first triode, a first field effect transistor, a current-limiting resistor and a charging indicator lamp, wherein a first pin of the charging management chip is connected to a base electrode of the first triode, a collector electrode of the first triode is connected to a grid electrode of the first field effect transistor, and a source electrode of the first field effect transistor is connected to a power supply end of the battery box through the current-limiting resistor.

7. Hob power supply system according to any one of claims 1 to 5, characterized in that:

the battery box is connected to the pulse ignition module and used for continuously supplying power to the pulse ignition module.

8. Hob power supply system according to any one of claims 1 to 5, characterized in that:

the battery box is connected to the charging management module and used for storing the electric energy output by the charging management module and limiting the stored electric energy to a preset rated voltage value for the use of an internal circuit of the kitchen range.

9. A charging management method for a thermoelectric generation stove power supply system, characterized in that the thermoelectric generation stove power supply system is the thermoelectric generation stove power supply system according to any one of the claims 1 to 8, and the control method comprises:

the heat conducting surface of the temperature difference power generation module is in contact with a part with temperature rise when the gas stove is burnt, after the gas stove is ignited, flame heat of the gas stove is transmitted to the stove surface, the temperature of the stove surface rises, heat around the temperature rise part when the gas stove works is absorbed by the heat conducting surface of the temperature difference power generation module, temperature difference is generated between the heat conducting surface and the heat radiating surface of the temperature difference power generation module, the heat conducting surface of the temperature difference power generation module transmits the heat to the temperature difference power generation sheet and generates output voltage through the Seebeck effect, the output voltage of the temperature difference power generation sheet is boosted and stabilized by the boosting constant current module and then outputs charging voltage to charge the battery box, the charging management module controls the battery box to charge positively, the charging voltage in the battery box is detected as feedback in real time, and the temperature difference power generation unit is controlled to stop working.

10. The charge management method according to claim 9, wherein:

the charging management module monitors the electric quantity state of the battery box in real time when the battery box is charged, and when the battery box is in the charging state, the charging indicator lamp is started to prompt the charging state; when the electric quantity of the battery box reaches the full-charge state, the charging management module controls the cut-off of the charging loop and simultaneously closes the charging indicator lamp to prompt the full-charge state.

11. The charge management method according to claim 9, wherein:

when the low voltage of the temperature difference power generation module is boosted to the charging voltage by the boosting constant current module, the voltage is output to the charging management chip, the charging management chip enters a normal operation state, the voltage state of the battery in the battery box is judged, if the voltage of the battery is smaller than a preset threshold value, the battery is judged to be in a power-off state, the charging management chip controls a signal output pin to output a high level to a base electrode of a first switch, a first triode and a first field effect transistor are both conducted to control a charging loop to be normally conducted, the charging management chip controls the battery box to be charged in a positive direction, and a charging indicator lamp flickers to prompt that the battery box is in a charging state, wherein the charging management chip compares the voltage difference between the boosting constant current module and the battery to judge whether the charging condition is achieved.

12. The charge management method according to claim 11, wherein:

if the battery voltage is larger than the preset threshold value, the battery is judged to be in a full-power state, the charging management chip controls the signal output pin to have no output, the first triode and the first field effect transistor are both cut off, the charging loop is controlled to be cut off, and meanwhile, the charging indicator lamp is normally on to prompt that the battery box is in the full-power state.

13. The charge management method according to claim 12, wherein:

when the current value of the charging loop exceeds a preset threshold value, the charging loop can be determined to be overloaded, the charging management chip controls the signal output pin to output a low level, the first triode is cut off, and the charging loop is controlled to be cut off.

14. The charge management method according to claim 9 or 10, characterized in that:

when larger current or voltage is needed, a plurality of thermoelectric generation pieces can be arranged on the temperature rise part of the gas stove main body, and when a multi-piece structure is adopted, the thermoelectric generation pieces are connected in parallel or in series.

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