KR20230122416A - A gas cooktop overheating prevention device with battery saving function based on switch - 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, forming a switch between the battery and microcomputer to turn it on by a thermocouple to supply battery power, A device for preventing overheating of a gas cooktop having a switch-type battery saving function, 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 battery switch provided between the battery and the micom and turned on/off by a signal from the thermocouple.
With the device as described above, battery power is supplied to the microcomputer when the temperature of the thermocouple reaches a certain level, thereby extending battery life and preventing frequent battery replacement, thereby improving user convenience.

Description

Gas cooktop overheating prevention device with battery saving function based on switch { A gas cooktop overheating prevention device with battery saving function based on switch }

The present invention includes a microcontroller (MCU) that detects overheating of the gas cooktop and blocks the magnetic power unit, and supplies battery power thereto. It relates to an overheating prevention device for a gas cooktop with a switch-type battery saving function.

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 to provide a microcontroller (MCU) that detects overheating of a gas cooktop and cuts off a magnetic power unit, supplying battery power thereto, but switching between the battery and microcomputer An overheating prevention device for a gas cooktop having a switch-type battery saving function that is formed and turned on by a thermocouple to supply battery power 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 microcomputer (MCU) for monitoring overheating as a signal or electromotive force of the thermocouple. To provide an overheating prevention device for a gas cooktop having a switch-type battery saving function that turns on/off according to

In order to achieve the above object, the present invention relates to an overheating prevention device for a gas cooktop having a switch-type battery saving function, comprising: a thermocouple installed around a 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 battery switch provided between the battery and the micom and turned 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 switch-type battery saving function, the device further comprising an amplification element for amplifying a signal of the thermocouple, and the battery switch is amplified by the amplification element. Characterized in that the thermocouple signal is received as a control signal.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a switch-type battery saving function, wherein the battery switch has a minimum temperature of the thermocouple that generates an on signal to drive the magnetic power unit. It is characterized in that it is configured to be smaller than the minimum temperature of the thermocouple that generates an electromotive force for.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a switch-type battery saving function, wherein the battery switch is composed of a semiconductor switch, and a signal from the thermocouple is connected to a control signal of the semiconductor switch. do.

In addition, the present invention relates to an overheating prevention device for a gas cooktop having a switch-type battery saving function, wherein the battery switch is composed of a relay switch, and the relay switch is turned on/off by the electromotive force of the thermocouple. do.

As described above, according to the overheating prevention device of a gas cooktop having a switch-type battery saving function according to the present invention, when the temperature of the thermocouple reaches a certain level, battery power is supplied to the microcomputer, thereby extending the life of the battery and frequent battery By preventing replacement, the effect of improving user convenience is obtained. 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 a device for preventing overheating of a gas cooktop having a switch-type battery saving function according to a first embodiment of the present invention.
2 and 3 are graphs illustrating the operation of the overheat protection device of the gas cooktop according to the first embodiment of the present invention.
4 is a block diagram of a configuration of an overheating prevention device for a gas cooktop having a switch-type battery saving function 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 switch-type battery saving function 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 power of the battery 40 supplied to the microcomputer (MCU) 30, the battery switch 60 or the amplification element 32 for amplifying the signal of the thermocouple 22 is 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 it is in an overheated state, it is possible to control the MPU switch 23 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 battery switch 60. That is, the signal of the thermocouple 22 is amplified and the amplified signal is transmitted to the battery switch 60 .

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

Specifically, the battery switch 60 is composed of a switch that is turned on/off according to a control signal. In particular, the battery switch 60 is composed of a semiconductor switch.

In addition, the battery switch 60 has a control signal terminal connected to the thermocouple 22 or the amplifying element 32 of the thermocouple 22 to receive the thermocouple signal as a control signal. The amplification element 32 receives the output voltage of the thermocouple 22, amplifies it, and transfers the amplified thermocouple signal to the battery switch 60. That is, the output or output signal of the thermocouple is directly connected to the control terminal of the battery switch 60. At this time, when a signal of a certain voltage or higher is received from the control terminal, it is detected as an on signal, and the battery switch 60 is turned on.

That is, when the temperature of the thermocouple 22 increases, the corresponding thermocouple signal operates as an on signal, and when the temperature of the thermocouple 22 is low or the signal does not come out from the thermocouple 22, it operates as an off signal. Set up. In other words, the battery switch 60 is configured to maintain an off state by default even without a control signal and to turn on the switch when an on signal is received.

Accordingly, when the temperature of the thermocouple 22 rises, the battery switch 60 is turned on to supply power from the battery 40 to the microcomputer 30 . 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, when the temperature of the thermocouple 22 decreases, the battery switch 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, the signal of the thermocouple 22 is low or the thermocouple signal is not generated. At this time, the battery switch 60 recognizes it as an off signal and turns itself off. When the battery switch 60 is turned off, power supplied from the battery 40 to the microcomputer 30 is cut off.

Meanwhile, preferably, the temperature (minimum temperature) of the thermocouple 22 at which the thermocouple signal is turned on is set lower than the temperature (minimum temperature) at which the electromotive force of the thermocouple 22 is supplied to operate (the MPU). . 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.

Also, preferably, the battery switch 60 may receive power from the battery 40 .

Next, the operation of the device for preventing overheating of a gas cooktop having a switch-type battery saving function according to an embodiment of the present invention will be described with reference to FIGS. 2 and 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, at the time point t2, the signal of the thermocouple 22 is transmitted to the battery switch 60 and turned on, and power from the battery 40 is supplied to the microcomputer 30. At this time, preferably, the signal of the thermocouple 22 is transmitted through the amplification element 32. The microcomputer (MCU) 30 receives power from the battery 40 and operates according to a built-in program. That is, at the time when the thermocouple 22 outputs a signal, power supply of the battery 40 starts, and the microcomputer (MCU) 30 operates.

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 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, when the thermocouple signal is less than or equal to a predetermined signal in the thermocouple 22, it is the same as an off signal transmitted to the battery switch 60. Accordingly, the battery switch 60 is turned off. That is, at a time point t9, the battery switch 60 is turned off, and the power of the battery 40 supplied to the microcomputer 30 is cut off. Then, the operation of the micom 30 ends.

Meanwhile, as shown in FIG. 3 , the electromotive force by the thermocouple 22 and the signal of the thermocouple 22 may be generated at different times. In the thermocouple 22, if the temperature at which the signal of the thermocouple is generated is lower than the temperature at which the electromotive force is generated, the signal of the thermocouple is first generated during ignition. In addition, when the temperature of the thermocouple 22 decreases after extinguishing, the signal of the thermocouple is generated later than the electromotive force of the thermocouple.

That is, as shown in the example of FIG. 3, after the thermocouple signal is turned on between the time points T1 and T2, the thermocouple electromotive force is supplied at the time point T2. In addition, after the supply of the thermocouple electromotive force is stopped at the time T9, the thermocouple signal is turned off between the time T9 and T10.

Next, a device for preventing overheating of a gas cooktop having a switch-type battery saving function according to a second embodiment of the present invention will be described with reference to FIG. 4 .

The second embodiment of the present invention has some differences from the configuration of the battery switch 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 battery switch 60 is configured as a relay switch and directly receives electromotive force from the thermocouple 22 . That is, the battery switch 60 is turned on/off by the electromotive force of the thermocouple 22 . At this time, the amplification element 32 is not provided.

Compared to the first embodiment, the power of the battery 40 is not supplied to the battery switch 60 by using the electromotive force of the thermocouple 22 . Therefore, the second embodiment has a greater battery saving effect than the first embodiment.

Also, in this case, the minimum temperature of the thermocouple 22 for turning on the battery switch 60 is smaller than the minimum temperature of the thermocouple 22 for operating the MPU 21 .

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: battery switch
51: cooker switch

Claims (5)

In the overheating prevention device of a gas cooktop having a switch-type battery saving function,
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,
The device for preventing overheating of a gas cooktop having a switch-type battery saving function, characterized in that it includes a battery switch provided between the battery and the micom and switched on/off by a signal of the thermocouple.
According to claim 1,
The device further comprises an amplifying element for amplifying the signal of the thermocouple, and the battery switch receives the amplified thermocouple signal from the amplifying element as a control signal. overheat protection device.
According to claim 1,
The battery switch is a switch-type battery, characterized in that the minimum temperature of the thermocouple generating an on signal is smaller than the minimum temperature of the thermocouple generating an electromotive force for driving the magnetic power unit. Overheating protection for gas cooktops with saving function.
According to claim 1,
The battery switch is composed of a semiconductor switch, and the overheating prevention device of the gas cooktop with a switch-type battery saving function, characterized in that the signal of the thermocouple is connected to the control signal of the semiconductor switch.
According to claim 1,
The battery switch is composed of a relay switch, and the relay switch is turned on / off by the electromotive force of the thermocouple.

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