JPH11201459A - Gas stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To require no member such as a control part or a dry cell and provide an inexpensive sensor in a device for preventing the overheat of cooking oil of a gas cooking appliance. SOLUTION: In a gas cooking appliance, a temperature sensor for preventing the overheat of cooking oil is provided in the central part of the burner of a cooking appliacne main body. The temperature sensor is constituted of a bimetal switch 7 as a heat sensor which is inserted into a sensor main body 8. The bimetal switch 7, a thermocouple and a safety valve provided in a gas passage are connected together in series with electric wires 10 to form an electrically closed circuit. For connection between both the poles 15 of the bimetal switch 7 and the electric wires 10, at least one of both the poles 15 is connected to the electric wire 10 through a fusing body 21 to form an electrically closed circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove for preventing fire or abnormal temperature rise due to tempura oil.

[0002]

2. Description of the Related Art Conventional gas stoves are often caused by overheating of tempura oil among domestic fires. To prevent this, an overheat prevention device is provided at the center of the gas stove burner to detect the temperature at the bottom of the pan. Shut off gas before oil reaches ignition temperature.

In this method, a thermistor is used in a temperature detecting section of an overheat prevention device, and a resistance value that changes with a rise in temperature is detected to determine a rise in temperature. (See, for example,
No. 26132)

[0004]

However, in the above configuration, in the overheat prevention device using the thermistor, the detected resistance value is determined by the control device, and the supply of voltage to the safety valve of the gas cock is stopped to supply gas. Had been shut off.

In this method, the number of parts such as a control unit for judging the detection of the overheat prevention device, a dry battery required for holding the safety valve of the gas cock and judging a signal, and a lead wire connecting each of them is large, and the cost is high. It had become something.

Further, when the ON point of the overheat prevention device fails, there is no method for shutting off the electric closed circuit, and even if the pot bottom is abnormally heated, it cannot be shut off, which is not satisfactory in terms of overheat prevention.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In a gas stove provided with a temperature sensor for preventing cooking oil from overheating at the center of a burner of a stove body, the temperature sensor is a sensor. A bimetal switch which is a heat-sensitive body inserted into the main body, the bimetal switch and a thermocouple and a safety valve provided in a gas flow path are connected in series by electric wires to form an electrically closed circuit, and Both the poles and the electric wire are connected, or at least one of the two poles is connected to the electric wire via a fusing body to form an electrically closed circuit.

The temperature sensor is constituted by a bimetal switch which is a heat-sensitive body inserted into the sensor body, and the operating temperature of the bimetal switch is 240 to 27.
0 ° C. and the operating temperature of the fusing body is set to 180 to 23.
The temperature was set in the range of 0 ° C.

[0009] The connection between the fusing body and both electrodes of the bimetal switch or between the fusing body and the electric wire is performed by solder welding, and the operating temperature of the solder welding is set in the range of 180 to 230 ° C.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a gas stove provided with a temperature sensor for preventing overheating of cooking oil in a central portion of a burner of the stove body, wherein the temperature sensor is a bimetal switch which is a heat-sensitive body inserted into the sensor body. The bimetal switch and the thermocouple and the safety valve provided in the gas flow path are connected in series by an electric wire to form an electrically closed circuit, and at least one of both poles of the bimetal switch is connected to the electric wire through a fusing body. The overheating prevention device using a bimetal switch is connected to form an electrically closed circuit.When the temperature reaches the set temperature, the bimetal is reversed, the bimetal is reversed, it normally closes, and the safety device circuit goes out. Turn off the voltage of such a circuit
And shut off the safety valve.

Here, by using a temperature sensor incorporating a general-purpose bimetal switch, it is possible to eliminate the control unit and the dry battery.

In order to use a general-purpose bimetal switch,
The structure is simple, the number of parts is small, the manufacturing cost is low, and the price is advantageous.

Also, in the unlikely event that the bimetal switch fails at the ON point and cannot be operated, the fusing body operates to cut off the electrically closed circuit, stop the gas, and ensure safety.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a stove main body, which is provided with burners 2 and 3 on the left and right sides and a grill 4 at a central portion.

Reference numeral 5 denotes a temperature sensor, 6 denotes a front panel, and an operation unit is provided.

The structure of the temperature sensor 5 is such that a bimetal switch 7 for general use is used as a heat sensitive part, inserted into the sensor body 8 and fixed by a fixing means 9 so that the bimetal switch 7 does not move.

The bimetal switch 7 does not operate during normal cooking or tempura cooking at an appropriate temperature, but is set to a temperature of 240 to 270 ° C. which operates when the oil temperature rises to a high temperature unsuitable for oil cooking. .

Reference numeral 12 denotes a spring that moves the temperature sensor 5 up and down, and is inserted into the shaft 13. It is assumed that the operating temperature of the temperature sensor 5 is set in a range of 240 to 270 ° C. The bimetal switch 7 and the sensor main body 8 can be moved up and down via the shaft 13 and the spring 12.

Reference numeral 14 denotes fixing means for controlling the vertical movement of the sensor body 8.

The shaft 13 has a bimetal switch 7
The electric wire 10 is connected to one end of the thermocouple 11 and one end of the safety valve 16.

The thermocouple 11 is further connected to another end of the safety valve 16 via the electric wire 10.

Reference numeral 18 denotes a holder for mounting the temperature sensor 5, which is fixed so as to have a certain projecting dimension from the temperature 19.

Reference numeral 20 denotes a gas cock.

The two poles 15 of the bimetal switch 7 are welded and fixed to the electric wire 10 via the electric wire 10 and connecting means 17 such as a terminal which is a conductor, and the other is welded and fixed to the electric wire 10 via a fusing body 21 to form an electrically closed circuit. ing.

Next, the operation of the present invention in the above configuration will be described.

When using a gas stove, the thermocouple 11
Is heated, and a thermoelectromotive voltage is generated in a circuit composed of the temperature sensor 5 and the safety valve 16, the safety valve 16 is held, and the combustion of the stove continues.

In cooking, the temperature sensor 5 moves downward through the shaft 13 when a pot or the like is placed on the goto 19, but the heat-sensitive part of the bimetal switch 7 detects the temperature of the pot bottom by the spring 12.

The bimetal switch 7 does not operate during normal cooking or tempura cooking at an appropriate temperature, but operates when the temperature of the oil rises to a high temperature of 240 to 270 ° C. which is not suitable for oil cooking.

When the bimetal switch 7 operates, the thermoelectromotive voltage to the safety valve 16 is cut off, and the gas flow path is closed.

As a result, combustion of the gas stove is stopped, and further heating of the oil is prevented.

Here, if the bimetal switch 7 fails at the ON point, it cannot be operated even if it reaches the temperature to be operated (240 to 270 ° C.).
The temperature of the oil further approaches the ignition temperature (approximately 370 ° C.). However, when the temperature of the oil approaches approximately 350 ° C. before that, the operating temperature of the fusing body 21 becomes 180 to 230 ° C., and the closed circuit is closed. It is shut off and the gas flow path is closed.

The same effect can be obtained even if the melting temperature of the blown body 21 is set to 180 to 230 ° C. by solder welding.

[0034]

As described above, according to the gas stove of the present invention, the following effects can be obtained.

That is, a fire such as a tempura was prevented without using a dry battery, and the safety was not changed from the conventional one.

The present invention, which does not use a dry battery, has solved all of these problems and provided a product which can be used safely.

Further, even in the event of a failure of the bimetal switch, double safety can be ensured by the operation of the fusing body.

As described above, since the structure is simple, it is possible to provide a product having low manufacturing cost and good usability.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a gas stove showing one embodiment of the present invention.

FIG. 2 is a sectional view of a gas stove showing one embodiment of the present invention.

FIG. 3 is a perspective view of a temperature sensor of the gas stove showing one embodiment of the present invention.

FIG. 4 is a cross-sectional view of a gas stove temperature sensor showing one embodiment of the present invention.

FIG. 5 is an exploded perspective view of a gas stove temperature sensor showing one embodiment of the present invention.

FIG. 6 is a unit diagram of a gas stove temperature sensor showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stove main body 2 Burner 5 Temperature sensor 7 Bimetal switch 8 Sensor main body 10 Electric wire 11 Thermocouple 15 Bipolar 16 Safety valve 21 Fusing body

Claims (3)

[Claims] 1. A gas stove provided with a temperature sensor (5) for preventing overheating of cooking oil in a central portion of a burner (2) of a stove body (1), wherein the temperature sensor (5) is inserted into the sensor body (8). A bimetal switch (7), which is a heat-sensitive material, and the bimetal switch (7)
And a thermocouple (11) and a safety valve (1
6) are connected in series by an electric wire (10) to form an electrically closed circuit, and at least one of both poles (15) of the bimetal switch (7) is connected to the electric wire (10) via a fusing body (21). A gas stove characterized by being formed into an electrically closed circuit. 2. The temperature sensor (5) is composed of a bimetal switch (7) which is a heat-sensitive body inserted into the sensor body (8), and the operating temperature of the bimetal switch (7) is set to 240 to 270 ° C. After setting, melted body (2
2. The gas stove according to claim 1, wherein the operating temperature of (1) is set in a range of 180 to 230 [deg.] C. 3. The connection between the fusing body (21) and both electrodes (15) of the bimetal switch (7) or between the fusing body (21) and the electric wire (10) is performed by solder welding, and the operating temperature of the solder welding is set to 180. 2. The gas stove according to claim 1, wherein the temperature is set in a range from to 230 [deg.] C.