KR20230122419A - A gas cooktop overheating prevention device with battery saving function based on self hold circuit - Google Patents

Abstract

Equipped with a microcontroller (MCU) that detects overheating of the gas cooktop and blocks the magnetic power unit, and supplies battery power to it, but forms a self-maintaining circuit between the battery and microcomputer to turn it on/off by a thermocouple A device for preventing overheating of a gas cooktop having a battery saving function of a self-holding circuit method, supplying/cutting off battery power by supplying/disconnecting battery power, comprising: a thermocouple installed around a combustion unit and generating electromotive force by applied heat; a magnetic power unit that controls gas supply by generating magnetic force to drive a magnetic valve; An MPU switch provided between the thermocouple and the magnetic power unit to switch on/off; a high-cut sensor that measures the temperature of the cooking vessel; A micom that receives the temperature measured from the high-cut sensor and transmits a cut-off signal to the MPU switch when it is determined that the temperature is overheated according to the received temperature; battery; and a self-maintaining circuit provided between the battery and the micom and turned on/off by a signal from the thermocouple.
With the device as described above, when the voltage of the thermocouple is high, the self-maintenance circuit is turned on to supply battery power to the microcomputer, thereby extending the life of the battery and preventing frequent battery replacement, thereby improving user convenience. there is.

Description

A gas cooktop overheating prevention device with battery saving function based on self hold circuit }

The present invention includes a microcontroller (MCU) that detects overheating of the gas cooktop and blocks the magnetic power unit, and supplies battery power to it, but forms a self-maintaining circuit between the battery and microcomputer to turn on/off by thermocouple It relates to an overheating prevention device of a gas cooktop having a battery saving function of a self-maintaining circuit method that supplies/disconnects battery power by turning off the battery.

In general, gas cooktops using gas as fuel are widely used not only in homes and restaurants, but also in production sites. In addition, various types of safety devices (gas blocking devices) are proposed to prevent gas leakage accidents or safety accidents and fires caused by gas leakage during use of the gas cooktop.

For example, there is a device that detects gas leakage and shuts off gas, or a device that automatically stops combustion operation when the temperature of cooking utensils heated during combustion operation reaches a temperature equal to or higher than a predetermined overheating determination temperature.

As an example of this type of blocking device, a technique for selectively blocking electromotive force of a thermocouple according to a voltage value of a high-cut sensor has been proposed [Patent Document 1]. In particular, the prior art blocks the electromotive force of the thermocouple (TC) transmitted to the magnetic power unit (MPU) according to the comparison result of the two different comparators receiving the voltage value of the high-cut sensor.

However, the prior art has a problem in that a comparison operation is continuously performed by a comparison unit for comparing an overheated state. That is, there is a problem in that the battery is continuously consumed even when the gas cooktop is not used.

In addition, as another example of an overheating cut-off device, a technique of cutting off the power supply of a battery when a burner of a gas cooktop is not used has been proposed [Patent Document 2]. That is, in the prior art, all burners of the gas cooktop are independently controlled, and when all burners are turned off, the power supply of the battery is cut off.

However, the prior art has a problem in that battery consumption is high because signal power for maintaining ignition of the gas cooktop is used through a battery.

If the battery consumption is high in the gas cooktop, there is a problem of shortening the battery (dry cell) replacement cycle. In other words, since the capacity of the battery decreases quickly, there is a hassle to change the battery as often as that.

Korean Patent Registration No. 10-2027690 (2019.10.01. Notice) Korean Patent Registration No. 10-1529116 (2015.06.16. Notice)

An object of the present invention is to solve the above-mentioned problems, and has a microcontroller (MCU) that detects overheating of the gas cooktop and blocks the magnetic power unit, and supplies battery power thereto, but self-maintains between the battery and microcomputer To provide an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit method in which a circuit is turned on/off by a thermocouple to supply/disconnect battery power.

In addition, an object of the present invention is to turn on a self-holding circuit according to a first signal of a thermocouple by a high voltage and to turn off a self-holding circuit according to a second signal of a thermocouple by a low voltage, An overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit method is provided.

In addition, an object of the present invention is to use the power generated by the thermocouple (TC) for the power of the magnetic power unit (MPU) for gas supply, and to supply the battery to the MCU (MCU) monitoring overheating according to the signal of the thermocouple. It is to provide an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit type that turns on/off.

In order to achieve the above object, the present invention relates to a device for preventing overheating of a gas cooktop having a battery saving function of a self-holding circuit type, comprising: a thermocouple installed around a combustion unit and generating electromotive force by applied heat; a magnetic power unit that controls gas supply by generating magnetic force to drive a magnetic valve; An MPU switch provided between the thermocouple and the magnetic power unit to switch on/off; a high-cut sensor that measures the temperature of the cooking vessel; A microcomputer for receiving the temperature measured by the high-cut sensor and transmitting a cut-off signal to the MPU switch when it is determined that the temperature is overheated according to the received temperature; battery; and a self-maintaining circuit provided between the battery and the micom and switching on/off by a signal from the thermocouple.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit method, wherein the device compares the voltage of the thermocouple with a first reference voltage determined in advance, and the thermocouple voltage is a first comparator that transmits an operation signal to the self-holding circuit when the voltage is greater than the first reference voltage; and a second comparator that compares the voltage of the thermocouple with a predetermined second reference voltage and transmits a release signal to the self-holding circuit when the thermocouple voltage is lower than the second reference voltage. to be

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit type, wherein the first reference voltage is greater than the second reference voltage.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit type, wherein the temperature of the thermocouple corresponding to the first reference voltage is supplied with electromotive force of the thermocouple to operate the magnetic power unit It is characterized in that the first reference voltage is set to be higher than the minimum temperature to be.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit type, wherein the temperature of the thermocouple corresponding to the second reference voltage is supplied with electromotive force of the thermocouple to operate the magnetic power unit It is characterized in that the second reference voltage is set to be lower than the minimum temperature to be.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit type, the device further comprising an amplification element for amplifying the signal of the thermocouple, and the amplification element amplified by the amplification element It is characterized in that it is passed to the first and second comparators.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit type, wherein the self-holding circuit receives an operation signal by turning on a cooking zone switch, and responds to the signal of the thermocouple It is characterized in that the release signal is input by.

As described above, according to the overheating prevention device of a gas cooktop having a battery saving function of a self-holding circuit method according to the present invention, when the voltage of the thermocouple is high, the self-holding circuit is turned on to supply battery power to the microcomputer. , The lifespan of the battery is extended and frequent battery replacement is prevented, so that the user's convenience can be improved. That is, the present invention can minimize the energy consumption of the battery, and through this, it is possible to solve the inconvenience of frequent battery replacement.

1 is a block diagram of the configuration of a device for preventing overheating of a gas cooktop having a battery saving function of a self-holding circuit method according to a first embodiment of the present invention.
2 is an exemplary view of the configuration of a self-holding circuit according to a first embodiment of the present invention;
3 is a graph illustrating the operation of an overheat protection device for a gas cooktop according to a first embodiment of the present invention.
4 is a block diagram of a configuration of an overheating prevention device of a gas cooktop having a battery saving function of a self-holding circuit method according to a second embodiment of the present invention.
5 is a graph illustrating the operation of an overheat protection device for a gas cooktop according to a second embodiment of the present invention.

Hereinafter, specific details for the implementation of the present invention will be described according to the drawings.

In addition, in explaining the present invention, the same reference numerals are assigned to the same parts, and the repeated explanation thereof is omitted.

Next, a device for preventing overheating of a gas cooktop having a battery saving function of a self-holding circuit method according to a first embodiment of the present invention will be described with reference to FIG. 1 .

As shown in FIG. 1, the device 100 for preventing overheating of a gas cooktop according to the first embodiment of the present invention includes a magnetic power unit (MPU) 21 for controlling gas supply to a combustion unit 11, a thermocouple (22), and an MPU switch (23), and a high-cut sensor (31) for preventing overheating of the gas cooktop, and a microcontroller (MCU) (30).

In addition, in order to save the power of the battery 40 supplied to the microcomputer (MCU) 30, the signal of the self-holding circuit 60, the first and second comparators 61 and 62, or the thermocouple 22 An amplification element 32 for amplification and the like are further included.

First, a configuration for controlling gas supply will be described.

That is, the magnetic power unit (MPU) 21 controls gas supply to the combustion unit 11 by generating magnetic force to drive the magnetic valve 12 .

In addition, a thermocouple (TC) 22 is installed around the combustion unit 11 where gas is burned to generate thermoelectric power by applied heat.

In addition, the thermocouple 22, the magnetic power unit 21, and the MPU switch 23 are connected in series and constitute a closed loop. Accordingly, the electromotive force generated by the thermocouple 22 is supplied to the magnetic power unit 21 .

That is, gas supply is in a state in which the output terminal of the thermocouple 22 is connected to the power supply terminal of the magnetic power unit 21, and the magnetic valve provided in the magnetic power unit 21 by the thermoelectric power generated by the thermocouple 22 (12) is selectively driven to supply or cut off gas. That is, when power is supplied to the magnetic power unit 21, the magnetic valve 12 is opened to supply gas, and when power is cut off, gas is cut off.

Therefore, when the gas is turned on and heat is generated by the gas, the electromotive force of the thermocouple 22 is supplied to the magnetic power unit 21 so that the magnetic valve 12 can remain open. When the gas is on, the valve 12 is automatically opened continuously.

Meanwhile, the MPU switch 23 is provided between the thermocouple 22 and the magnetic power unit 21 to turn on or off the supply of thermal electromotive force of the thermocouple 22 . That is, the MPU switch 23 supplies or blocks the electromotive force of the thermocouple 22 to the magnetic power unit 21 .

In addition, the MPU switch 23 is controlled by a microcomputer (MCU) 30.

In addition, the MPU switch 23 may be composed of a semiconductor switch. In addition, preferably, the MPU switch 23 maintains an on state by default even if there is no control signal by the microcomputer (MCU) 30, and turns off the switch when receiving an off signal. is configured to

Also, preferably, the MPU switch 23 may receive power from the electromotive force of the thermocouple 33 .

Next, the high cut sensor 31 is installed near the combustion unit 11 to measure the temperature of the cooking zone of the gas cooktop. In particular, the high cut sensor 31 detects the temperature of the cooking vessel in a state where the combustion unit 11 is elastically connected to the bottom surface of the cooking vessel.

The high cut sensor 31 is connected to a microcomputer (MCU) 30, and the detected temperature is transmitted to the microcomputer 30. Preferably, the high cut sensor 31 outputs the detected temperature as a voltage value.

In addition, the microcontroller unit (MCU) 30 is a microcontroller, has a plurality of input/output terminals, receives signals from input terminals, processes them internally by a control program, and outputs control signals to output terminals. do.

In addition, the microcomputer 30 receives power through the battery 40 .

Specifically, the microcomputer 30 is connected to the high cut element 31 to receive a signal therefrom, and is connected to the control terminal of the MPU switch 23 to output a control signal.

In particular, the microcomputer 30 receives and monitors the temperature (or voltage value) of the cooking zone from the high-cut sensor 31, and sends a cutoff signal (or off signal) to the MPU switch 23 when a predetermined overheating condition is met. print out The overheat condition may be set in various ways, such as when the crater temperature exceeds a predetermined critical temperature or when the crater temperature continuously maintains a specific temperature for a certain period of time.

As a preferred example, the microcomputer 30 receives the temperature (or voltage value) of the cooking zone from the high-cut sensor 31, and when the input temperature exceeds a predetermined threshold temperature, the MPU switch 23 blocks the signal (or off signal). Therefore, when the temperature of the cooking zone exceeds the critical temperature, the MPU switch 23 is cut off, and the supply of electromotive force of the thermocouple 22 to the MPU 21 is stopped. At this time, the magnetic valve 12 is closed. That is, the microcomputer 30 detects the temperature through the high-cut sensor 31, and when the detected temperature exceeds the critical temperature and determines that the overheating state occurs, the MPU switch 23 is controlled to cut off the gas supply.

Next, the amplification element (OP AMP) 32 is an element that amplifies the voltage (or thermoelectromotive force) of the thermocouple 22 . In addition, the input terminal of the amplification element 32 is connected to the thermocouple 22, and the output terminal is connected to the self-holding circuit 60 or the first and second comparators 61 and 62. That is, the signal of the thermocouple 22 is amplified and the amplified signal is transmitted to the first and second comparators 61 and 62 .

In addition, the first and second comparators 61 and 62 are comparators that compare with the reference voltage, and are connected to the thermocouple 22 or the amplification element 32 to receive a thermocouple signal. At this time, the first comparator 61 compares the thermocouple signal (or the voltage of the thermocouple) with the first reference voltage, and outputs an on signal when the thermocouple voltage is greater than (or greater than or equal to) the first reference voltage. , it outputs an off signal if it is small. On the other hand, the second comparator 62 compares the thermocouple voltage with the second reference voltage, and outputs an on signal if the thermocouple voltage is less than (or less than or equal to) the second reference voltage, and if it is greater than the second reference voltage, it outputs an off signal. output a signal

Meanwhile, the first and second reference voltages are set in advance. Preferably, the first reference voltage is set higher than the second reference voltage.

In addition, the first reference voltage is set so that the temperature of the thermocouple 22 corresponding to the first reference voltage is higher than the temperature (minimum temperature) at which the electromotive force of the thermocouple 22 is supplied to operate the MPU 21. Since the MCU 30 monitors overheating, it is okay to monitor after the thermocouple 22 is sufficiently heated. In order to save power of the battery 40, power is supplied as late as possible. At this time, it is preferable to set the first reference voltage as high as possible.

In addition, the second reference voltage is set so that the temperature of the thermocouple 22 corresponding to the second reference voltage is lower than the temperature (minimum temperature) at which the electromotive force of the thermocouple 22 is supplied to operate the MPU 21. That is, this is to prevent the MCU 30 from being stopped because the battery power is cut off before the magnetic valve 12 is cut off. At this time, preferably, the second reference voltage is set equal to or lower than the minimum temperature with only a slight difference.

In addition, a self-holding circuit 60 is provided between the microcomputer 30 and the battery 40 to control power of the battery 40 supplied to the microcomputer 30 .

The self-holding circuit 60 is a normal self-holding circuit, and when the operation switch is turned on, the on state in the circuit is maintained even if the operation switch is turned off later. Therefore, the self-holding circuit 60 has a separate release switch for releasing the on state.

That is, as shown in FIG. 2, the self-holding circuit 60 is turned on by the operation switch A and maintains its state by the relay R. Also, it is turned off by release switch B. At this time, the relay R is also released and the holding state is also turned off.

Therefore, the self-holding circuit 60 includes an operation terminal (not shown) that receives an operation signal and a release terminal (not shown) that receives a release signal.

As shown in FIG. 1, the self-holding circuit 60 has an operating terminal connected to the output of the first comparator 61, and a release terminal connected to the output of the second comparator 62.

Specifically, when the on signal is output from the first comparator 61 and received, the self-holding circuit 60 turns on and maintains its state. That is, once the on signal is output from the first comparator 61, even if the on signal is not output thereafter, the self-holding circuit 60 maintains the on state.

That is, when the voltage (or temperature) of the thermocouple 22 increases and the corresponding voltage exceeds the first reference voltage, an on signal is output from the first comparator 61, and the self-holding circuit 60 turns on. ) do. At this time, the power of the battery 40 is supplied to the MCU 30. At this time, since the second reference voltage is lower than the first reference voltage, the corresponding thermocouple voltage is higher than the second reference voltage. Therefore, the second comparator 62 outputs an off signal and cannot release the on state of the self-holding circuit 60.

In addition, the microcomputer 30 operates by an internal control program when power is supplied from the battery 40 . That is, the microcomputer 30 performs overheat protection through the high cut sensor 31 and the MPU switch 23 .

In addition, even if the voltage of the thermocouple 22 drops below the first reference voltage, if it is higher than the second reference voltage, the on state of the self-holding circuit 60 is maintained. That is, since the thermocouple voltage is higher than the second reference voltage, the second comparator 62 still outputs an off signal, so that the on state of the self-holding circuit 60 cannot be released.

However, when the voltage of the thermocouple 22 is lower than the second reference voltage, an on signal is output from the second comparator 61, and the self-holding circuit 60 is turned off. At this time, since the corresponding thermocouple voltage is lower than the first reference voltage, the first comparator 61 still outputs an off signal, so that the self-holding circuit 60 cannot be turned on.

That is, the self-holding circuit 60 is turned off and the power of the battery 40 is cut off. Accordingly, the microcomputer 30 and the like do not receive power from the battery 40 . For example, when a certain time elapses after the gas is turned off, the thermocouple 22 does not generate electromotive force because it does not receive heat. At this time, a release signal is output so that the self-holding circuit 60 is turned off, and the power supplied from the battery 40 to the microcomputer 30 is cut off.

Also, preferably, the self-holding circuit 60 receives power from the battery 40.

Next, an operation of an overheating prevention device for a gas cooktop having a battery saving function of a self-holding circuit method according to an embodiment of the present invention will be described with reference to FIG. 3 .

First, at time t1, when the user turns on the burner switch 51, the burner is ignited. That is, while the cooker switch 51 is turned on, the magnetic valve 12 is physically opened in conjunction with the cooker switch 51 . At this time, the magnetic valve 12 is manually opened to supply gas, and the gas is ignited and turned on. That is, at the time point t1, ignition is turned on and the magnetic valve 12 is manually opened.

When the gas is turned on at time t1, the temperature of the crater rises over time. Therefore, at time t2, thermal electromotive force is generated in the thermocouple 22, and power is supplied to the magnetic power unit (MPU) 21.

Therefore, at time t2, the magnetic power unit (MPU) 21 is driven to open the magnetic valve 12 by magnetic force. However, at time t2, since the user is still turning on the cooker switch 51, the magnetic valve 12 is both open manually by the cooker switch 51 and electronically by the MPU 21. ) remains.

In addition, at time t2, since the MPU switch 23 is a passive element, it starts to function as a switch as power is supplied from the thermocouple 22.

Also, since the voltage of the thermocouple 22 has not yet reached the first reference voltage at the time point t2, the self-holding circuit 60 is in an off state.

Next, at the time point t3, the user returns the burner switch 51 to its original state. Therefore, at the time point t3, the manual opening operation of the cooker switch 51 of the magnetic valve 12 is stopped. However, the magnetic valve 12 maintains an electronically open state by the MPU 21 .

Next, at time t4, the voltage of the thermocouple 22 exceeds the first reference voltage, an on signal is output to the first comparator 61, and the self-holding circuit 60 is turned on. Accordingly, power from the battery 40 is supplied to the microcomputer 30 . The microcomputer (MCU) 30 receives power from the battery 40 and operates according to a built-in program. That is, when the voltage of the thermocouple 22 exceeds the first reference voltage, the power supply of the battery 40 starts, and the microcontroller (MCU) 30 operates to monitor overheating.

Next, at time t7, overheating is detected in the high cut sensor 31. That is, the microcomputer 30 determines that the temperature detected by the high-cut sensor 31 exceeds the critical temperature and thus is in an overheated state. At this time, the micom 30 outputs a blocking signal to the MPU switch 23.

Therefore, at a time point t7, the MPU switch 23 is turned off, and the power supplied from the thermocouple 22 to the MPU 21 is cut off. That is, the magnetic power unit (MPU) 21 stops operating and the magnetic valve 12 is closed.

However, a high temperature is still maintained around the combustion unit 11, and the temperature gradually drops over time.

First, at time t8, the temperature drops below the critical temperature, and the overheating state caused by the high-cut sensor 31 ends.

And the more time passes, the more the temperature drops. Therefore, at the time point t9, no electromotive force is generated in the thermocouple 22. At this time, if the MPU 21 is supplied with electromotive force by the thermocouple 22, the electromotive force is blocked so that the MPU 21 is turned off and the magnetic valve 12 is blocked.

After time t9, when more time passes and the temperature drops further and the voltage of the thermocouple 22 drops below the second reference voltage, the second comparator 62 outputs an on signal, that is, a release signal, The self-holding circuit 60 is turned off. The power of the battery 40 supplied to the microcomputer 30 is cut off. Then, the operation of the micom 30 ends.

Next, a device for preventing overheating of a gas cooktop having a battery saving function of a self-holding circuit method according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5 .

The second embodiment of the present invention has some differences from the configuration of the self-holding circuit 60, and the rest of the configuration is the same as that of the first embodiment. Hereinafter, for convenience of description, configurations with differences will be mainly described. The configuration of the second embodiment, which is not described below, refers to the configuration of the first embodiment above.

As shown in FIG. 4 , the self-holding circuit 60 receives an operation signal through the cooking zone switch 51 . That is, when the cooker switch 51 is turned on, an on signal is output to the operation terminal of the self-holding circuit 60 .

When the cooker switch 51 is turned on, the self-maintaining circuit 60 is turned on, and supplies power from the battery 41 to the microcomputer 30. At this time, even if the cooker switch 51 does not maintain an on state, the self-holding circuit 60 maintains an on state.

In other words, the self-maintaining circuit 60 is turned off until the cooking zone switch 51 is turned on. At this time, the power supply from the battery 41 to the micom 30 is cut off. And, as the cooker switch 51 is turned on, the self-holding circuit 60 is turned on, and the power of the battery 41 is supplied to the microcomputer 30 by the self-holding circuit 60.

The process of turning off the self-holding circuit 60 is the same as that of the first embodiment.

5 is a graph showing the operation of the second embodiment of the present invention.

As shown in FIG. 5, at a time point T1 when the cooking zone switch 51 is turned on, the self-maintaining circuit 60 is turned on, power is supplied to the battery 40, and the microcomputer 30 is also operated. . Further, the cooker switch 51 should be maintained until the electromotive force by the thermocouple 22 drives the MPU 21 to open the magnetic valve 21 electronically. At this time, the voltage of the thermocouple becomes higher than the first voltage. Therefore, the signal by the second comparator 62 is output as off. That is, the self-holding circuit 60 maintains an on state.

In the above, the invention made by the present inventors has been specifically described according to examples, but the present invention is not limited to the examples, and various changes are possible without departing from the gist of the invention.

11: combustion unit 12: magnetic valve
21: magnetic power unit (MPU) 22: thermocouple (TC)
23: MPU switch
30: microcomputer (MCU) 31: high cut sensor
32: amplification element
40: battery 60: self-holding circuit
51: cooker switch

Claims (7)

In the overheating prevention device of a gas cooktop having a battery saving function of a self-holding circuit method,
A thermocouple installed around the combustion unit to generate electromotive force by applied heat;
a magnetic power unit that controls gas supply by generating magnetic force to drive a magnetic valve;
An MPU switch provided between the thermocouple and the magnetic power unit to switch on/off;
a high-cut sensor that measures the temperature of the cooking vessel;
A micom that receives the temperature measured from the high-cut sensor and transmits a cut-off signal to the MPU switch when it is determined that the temperature is overheated according to the received temperature;
battery; and,
A device for preventing overheating of a gas cooktop having a battery saving function of a self-holding circuit method, comprising a self-holding circuit provided between the battery and the micom and switching on/off by a signal of the thermocouple.
The method of claim 1, wherein the device,
a first comparator that compares the voltage of the thermocouple with a first reference voltage determined in advance and transmits an operation signal to the self-holding circuit when the thermocouple voltage is greater than the first reference voltage; and,
Further comprising a second comparator that compares the voltage of the thermocouple with a predetermined second reference voltage and transmits a release signal to the self-holding circuit when the thermocouple voltage is lower than the second reference voltage. Overheating prevention device for gas cooktop with self-holding circuit type battery saving function.
According to claim 2,
The first reference voltage is greater than the second reference voltage.
According to claim 2,
The first reference voltage is set so that the temperature of the thermocouple corresponding to the first reference voltage is higher than the minimum temperature at which the electromotive force of the thermocouple is supplied to operate the magnetic power unit. Overheating protection for gas cooktops with battery saving function.
According to claim 2,
The second reference voltage is set so that the temperature of the thermocouple corresponding to the second reference voltage is lower than the minimum temperature at which the electromotive force of the thermocouple is supplied to operate the magnetic power unit. Overheating protection for gas cooktops with battery saving function.
According to claim 2,
The device further comprises an amplification element for amplifying the signal of the thermocouple, and transfers the amplified signal from the amplification element to the first and second comparators. overheat protection device.
According to claim 1,
The self-maintaining circuit receives an operation signal by turning on the cooker switch and receives a release signal by the signal of the thermocouple. Device.

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