JPH11201460A - Gas cooking appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate members 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 appliance main body. The temperature sensor is constituted of a first bimetal switch 7 as a heat sensor which is inserted into a sensor main body 8, the first 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 first 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 second bimetal switch 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 first bimetal switch which is a heat-sensitive body inserted into the main body, and the first 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, Either both poles of the first bimetal switch and the electric wire are connected, or at least one of the two poles is connected to the electric wire via the second bimetal switch to form an electrically closed circuit.

The temperature sensor is constituted by a first bimetal switch which is a heat-sensitive body inserted into the sensor main body.
To 270 ° C, and the operating temperature of the second bimetal switch was set in the range of 230 to 270 ° C.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas stove provided with a temperature sensor for preventing cooking oil from overheating at the center of a burner of the stove body, wherein the temperature sensor is a first bimetal which is a heat-sensitive body inserted into the sensor body. The first bimetal switch and the safety valve provided in the thermocouple and 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 first bimetal switch is connected to the first bimetal switch. The overheating prevention device using the first bimetal switch is connected to the electric wire via the two-bimetal switch fusing body to form an electrically closed circuit. Then, the safety device circuit is shut off, the voltage of the circuit applied to the safety valve is turned off, and the safety valve is shut off.

Here, by using a temperature sensor in which a general-purpose bimetal switch is incorporated, 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, should the first bimetal switch be ON
Even if a point failure occurs and operation becomes impossible, the second bimetal switch operates to cut off the electric closed circuit, stop the gas and ensure safety.

[0013]

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 body, on which burners 2 and 3 are provided on the left and right, and a grill 4 is provided at the center.

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 heat-sensitive portion uses a first bimetal switch 7 used for general purpose, is inserted into a sensor body 8, and is fixed by fixing means 9 so that the first bimetal switch 7 does not move. .

The first bimetal switch 7 does not operate during normal cooking or tempura cooking at an appropriate temperature, but is set to a temperature of 230 to 270 ° C. which operates when the oil temperature rises to a high temperature unsuitable for oil cooking. It is.

Reference numeral 12 denotes a spring that moves the temperature sensor 5 up and down, and is inserted into the shaft 13. This shaft 1
3. The bimetal switch 7 and the sensor main body 8 can be moved up and down via the spring 12.

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

An electric wire 10 connected to the first bimetal switch 7 communicates with the shaft 13, and is connected to one end of a thermocouple 11 and one end of a safety valve 16, respectively.

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 to which the temperature sensor 5 is attached, which is fixed so as to have a certain projecting dimension from the window 19.

Reference numeral 20 denotes a gas cock.

Further, both poles 1 of the first bimetal switch 7
5 is a connection means 17 such as a wire 10 and a terminal or the like which is a conductor.
And the other is welded and fixed to the electric wire 10 via the second bimetal switch 21 to form an electrically closed circuit.

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

When a gas stove is used, 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, when a pot or the like is placed on the goto 19, the temperature sensor 5 moves downward through the shaft 13, but the first bimetal switch 7 is moved by the spring 12.
The temperature sensing part detects the temperature at the bottom of the pan.

The first bimetal switch 7 does not operate during normal cooking or tempura cooking at an appropriate temperature, but operates when the oil temperature rises to a high temperature of 230 to 270 ° C. which is not suitable for oil cooking.

When the first bimetal switch 7 operates, the thermal electromotive 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, the first bimetal switch 7 is turned on.
If a point failure occurs, the operating temperature (230 to 270)
° C), the oil cannot be operated (at this time, the second bimetal switch = about 150 to 190 ° C), and is further overheated, and the oil temperature approaches the ignition temperature (about 370 ° C). Before and after, the second bimetal switch 21 reaches the operating temperature of 230 to 270 ° C., so that the closed circuit is cut off and the gas flow path is closed.

[0032]

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 those problems and provided a product which can be used safely.

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

Further, by using a bimetal for the second bimetal switch, even if this switch is operated, unlike a temperature fuse, the bimetal returns again when the temperature drops, so that the equipment can be reused.

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.

FIGS. 4A and 4B are sectional views (a) and (b) 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 First bimetal switch 8 Sensor main body 10 Electric wire 11 Thermocouple 15 Bipolar 16 Safety valve 21 Second bimetal switch

Claims (2)

[Claims] 1. A gas stove provided with a temperature sensor (5) for preventing cooking oil from overheating at the center of a burner (2) of a stove body (1), wherein the temperature sensor (5) is inserted into the sensor body (8). The first bimetal switch (7) is a thermosensitive member, and the first bimetal switch (7) is connected in series with a thermocouple (11) and a safety valve (16) provided in a gas passage by an electric wire (10). And at least one of both poles (15) of the first bimetallic switch (7) is connected to the electric wire (10) via the second bimetallic switch (21) and electrically closed. A gas stove characterized by constituting a circuit. 2. The temperature sensor (5) is composed of a first bimetal switch (7), which is a heat-sensitive body inserted into the sensor body (8), and controls the operating temperature of the first bimetal switch (230). To 270 ° C. and the operating temperature of the second bimetal switch (21) is set to 230 to
2. The gas stove according to claim 1, wherein the temperature is set in a range of 270.degree.