KR100262398B1 - Gas cutoff for gas oven range - Google Patents

Abstract

PURPOSE: A gas breaker of a gas range is provided to prevent gas from being supplied to a burner securely and doubly in wrong operation of a gas range. CONSTITUTION: A gas breaker comprises a main pipe(30) guiding gas into a gas range; a branch pipe diverging from the main pipe and guiding gas to a burner; a first gas breaking unit shutting off gas from the branch pipe in abnormal state of the burner; and a second gas shutoff unit shutting off gas from the main pipe. The second gas shutoff unit has a shutoff valve shutting off gas supply of the main pipe, a flame detecting sensor(14) detecting flame of the burner, an ignition switch(18) detecting a state of an ignition knob(16) igniting the burner, and a control unit(20) detecting the abnormal state based on signals from the flame detecting sensor and the ignition switch and shutting off the main pipe with driving the shutoff valve in the abnormal state.

Description

Gas shutoff device of gas range

1 is an explanatory diagram showing a configuration of a conventional gas shutoff device.

2 is an explanatory view showing the configuration of a gas shutoff device according to the present invention.

* Explanation of symbols for main parts of the drawings

10: burner 12: thermocouple

14 flame detection sensor 16 ignition knob

18: ignition switch 19: magnetic power unit

20: control unit 22: flame detection circuit

24: valve drive circuit 30: main pipe

32: main valve

The present invention relates to a gas shutoff device for a gas range, and more particularly, by configuring a separate main valve on the main pipe for supplying gas to the inside of the gas range so as to operate by a flame detection sensor installed on the burner side, A gas shutoff device for a gas oven range comprising a gas shutoff device.

The general gas range or gas oven range includes a magnetic power unit (MPU) that can automatically cut off the gas supply to the burner when the flame of the burner installed in the upper portion of the burner is extinguished.

The magnetic power unit is widely used because it is configured to open or block an internal gas passage using the thermal power generated from the thermocouple.

Referring to FIG. 1, a plurality of burners 8 are installed in the gas oven range or the upper portion of the gas range. In addition, a thermocouple 6 for sensing heat is installed near the burner 8, and the thermocouple 6 is connected to the magnetic power unit 2. The magnetic power unit 2 has a gas passage formed therein, and this gas passage is spoken with a branch pipe 4 branched from an internal main pipe to supply gas to each burner 8. have. Therefore, whether or not the gas is supplied to the burner 8 is substantially determined by the opening and closing of the gas passage in the magnetic power unit 2.

For example, when the user operates the ignition knob (not shown) installed in the front of the gas range to ignite the burner 8, the gas is supplied to the branched gas passage 4 through the magnetic power unit 2. The burner 8 is ignited.

When the burner 8 is ignited and heat is transferred from the burner to the thermocouple 6, the thermocouple 6 generates heat power based on the heat, and the heat power is generated inside the magnetic power unit 2. The gas passage of the car is kept open. And, during combustion, if the flame is extinguished in the burner 8 due to, for example, over the broth in the food or the outside wind, etc., since there is no heat detected by the thermocouple 6, the thermoelectric power is extinguished do. When the thermoelectric power is dissipated, the gas passage inside the magnetic power unit 2 is closed so that the gas supply to the burner 8 is no longer stopped.

According to the conventional gas shutoff device, when the soup overflows from the cooking during combustion or the combustion flame is extinguished due to the external wind, there is only one gas shutoff device that blocks the gas supplied to each burner. It can be seen.

However, in equipment such as gas ranges and gas ovens that handle gas, the gas shutoff device for blocking the gas in the event of an abnormality plays a relatively important role. In view of the frequent occurrence of explosion accidents due to gas leakage, a mechanism for shutting off the supply of gas in the event of an abnormal combustion condition is not enough for one device as described above. In case of relying on only one blocking device as described above, if any one of the internal components of the thermocouple or the magnetic power unit is damaged, accurate operation becomes difficult, and in this case, it is difficult to prevent an accident due to gas leakage.

For example, in order to prevent the external leakage of the microwave oven, the microwave oven is a device that cuts off the power to stop the generation of microwaves when the door to open and close the cavity is opened, and at least two electric shutoff devices are essential. have. Considering the actual gas accidents, the gas shutoff device may be implemented as a double triple shutoff device to prevent accidents caused by gas leakage.

It is an object of the present invention to provide a double gas supply shutoff device which can reliably stop the gas supply to a burner during abnormal operation of a gas range.

According to an aspect of the present invention, there is provided a gas shutoff device including: a main pipe for introducing external gas into a gas range; a branch pipe branched from the main pipe to guide gas to each burner; The first gas blocking means for blocking the gas of the branch pipe when an abnormal state occurs, and the second gas blocking means for blocking the gas of the main pipe when an abnormal state of the burner occurs, the abnormal state occurs during combustion When the flame is extinguished, it is possible to cut off the gas supplied to the inside of the gas equipment double, thereby increasing the safety.

And according to a specific embodiment of the second gas blocking means, a shut-off valve for shutting off the gas supply of the main pipe, a flame detection sensor for detecting the flame state in the selected burner, detecting the state of the ignition knob for igniting the burner On the basis of the ignition switch and the signal of the flame detection sensor and the ignition switch, it is determined whether or not the abnormal state, and if it is determined that the abnormal state, the control means for driving the shut-off valve to cut off the main pipe, the presence of a flame As a result, the gas supply to the main pipe can be shut off.

Next, the present invention will be described in more detail with reference to the embodiments shown in the drawings.

Referring to FIG. 2 showing a dual gas shutoff device according to the present invention, a magnetic power unit 19a is provided on a branch pipe branched from the main pipe 30 to independently supply gas to a plurality of burners 10a and 10b. And 19b) are provided respectively. The magnetic power units 19a and 19b are installed adjacent to the respective burners 10a and 10b, and the thermocouples 12a and 12b generate heat power when heat generated by the ignition of the burner 10 is transferred. It is connected.

Although the illustrated embodiment shows two burners 10, in the gas range or gas oven range, even if a plurality of burners are provided, application of the present invention is sufficiently possible. For example, in the gas oven range, four or more burners are designed including the burner inside the oven cavity, and of course, the present invention can be applied in such a case. The two burners 10a and 10b shown exemplarily show a plurality of burners installed in the gas combustion device.

When the ignition knobs 16a and 16b are operated to ignite the respective burners 10a and 10b, the gas is supplied through the magnetic power units 19a and 19b, and the burners 10a and 10b are ignited. It will start burning. As the start of combustion, the thermocouples 12a and 12b generate heat power while the heat is sensed, and the magnetic power units 19a and 19b continuously supply gas while maintaining the open state. To maintain the combustion state.

Next, a configuration of the double blocking device according to the present invention will be described.

In the vicinity of each of the burners 10a and 10b, flame detection sensors 14a and 14b are provided separately from the thermocouples 12a and 12b, respectively. The detection signal from the flame detection sensors 14a and 14b is transmitted to the flame detection circuit 22. The signal processed by the flame detection circuit 22 is input to the controller 22 which controls the entire gas range.

The ignition knobs 16a and 16b are provided with ignition switches 18a and 18b for sensing the state of the ignition knob, respectively. That is, it detects whether the state of the ignition knobs 16a and 16b is a current ignition state or a fire extinguishing state, and outputs such a signal to the control unit 20. As long as the ignition switches 18a and 18b can check the states of the ignition knobs 16a and 16b, any switching element may be used. As a simple configuration, the ignition switches 18a and 18b may be turned on according to the states of the ignition knobs 16a and 16b. It would also be possible to use a micro switch on / off.

And the control unit 20 for comparing and determining the input signal of the ignition switch (18a, 18b) and the input signal of the flame detection circuit 22 means a microprocessor installed in the gas (oven) range, The valve driving circuit 24 is controlled based on the two signals. And inside the gas (oven) range, as mentioned above, the main pipe 30 which supplies the gas supplied from the outside inside is provided, and each burner 10 branches each from the said main pipe 30, respectively. The gas is supplied through the branch pipe. The main valve 32 for controlling the supply of gas from the main pipe 30 is installed, the main valve 32 is determined by the valve driving circuit 24, the supply or blocking state of the gas.

Next, the operation state of the double gas shutoff device according to the present invention configured as described above will be described.

First, the operation of the primary gas shutoff device using the magnetic power units 19a and 19b will be briefly described. The primary gas shutoff device using the magnetic power units 19a and 19b performs substantially the same function as the conventional one. When the user operates the ignition knobs 16a and 16b to ignite the burners 10a and 10b, the gas is supplied to the burners 10a and 10b through the main pipe 30 and ignited to start combustion. The thermoelectric power generated by the thermocouples 12a and 12b, such as the start of combustion, continues to supply gas while keeping the magnetic power units 19a and 19b open.

In this state, when the abnormal state of the burners 10a and 10b occurs and the flames of the burners are extinguished, since the thermocouples 12a and 12b do not generate any thermal power, the magnetic power units 19a and 19b are The gas supply is stopped by blocking the internal gas passage. That is, the gas supply on the branch pipe branched from the main pipe 30 is blocked. Therefore, the supply of gas to the burners 10a and 10b is first stopped. However, the supply of gas is primarily stopped in this way, but the supply state of gas is maintained in the main pipe 30. In addition, if an abnormality occurs in the primary blocking device, it is difficult to substantially completely shut off the gas. In this case, while the secondary blocking device as described below is operating, the double gas blocking will be performed.

When the flame is extinguished due to an abnormal state of the burners 10a and 10b, the ignition knobs 16a and 16b are substantially in the state of maintaining the ignition position. Accordingly, the ignition switches 18a and 18b output a signal to the controller 20 indicating that the positions of the ignition knobs 16a and 16b are in the ignition state. In addition, since the flame is not detected in the flame detection sensor 14 installed on the burner 10 side in which the flame is extinguished, the flame detection circuit 22 notifies the controller 20 that the flame is extinguished based on the detection signal.

On the other hand, the control unit 20 determines whether the normal combustion state is maintained on the basis of the detection signal from the ignition switches 18a and 18b and the detection signal from the flame detection circuit 22. If the two detection signals do not match, it is determined that the abnormal state, and the control signal is applied to the valve driving circuit (24).

In response to a signal from the control unit 20, the valve driving circuit 24 drives the main valve 32 installed in the main pipe 30 to completely block the main pipe 30. That is, by completely blocking the main pipe 30 to which gas is supplied from the outside, the supply of gas to the gas (oven) range is doubled.

And look at another example for determining that the burner burn state is abnormal. For example, if the flame is not detected at the burner 10 selected by the ignition knob 18 and the flame is detected at the burner 10 that is not selected at the ignition knob 18, this state is abnormal in the control unit 20. The valve driving circuit 24 can be driven to judge the state. That is, according to the double gas shutoff apparatus according to the present invention, if the burner is not in a normal ignition state, it is determined as an abnormal state and the gas supply to the gas (oven) range is stopped.

As described above, according to the present invention, like a primary and regional gas shutoff device composed of a thermocouple and a magnetic power unit, a dual gas shutoff device for blocking the gas in the main pipe of the gas (oven) range at the source. By realizing, the effect which further improves the safety of gas equipment can be anticipated.

Claims (2)

A main pipe for introducing external gas into the gas range; A branch pipe branched from the main pipe to guide gas to each burner; First gas blocking means for blocking a gas of the branch pipe when an abnormal state of the burner occurs; And a second gas blocking means for shutting off the gas of the main pipe when an abnormal state of the burner occurs, wherein the second gas blocking means comprises: a shutoff valve for shutting off the gas supply of the main pipe; A flame detection sensor for detecting a flame state for detecting a flame state of a selected burner; An ignition switch for sensing a state of an ignition knob for igniting a burner; And a gas shut-off device of the gas range comprising control means for cutting the main pipe by driving the shut-off valve based on the signals of the flame detection sensor and the ignition switch. 2. The apparatus of claim 1, wherein the first gas blocking means comprises: a thermocouple disposed adjacent each burner; Gas cutoff device of the gas range consisting of a magnetic power unit for opening and closing the branch pipe by the thermoelectric power generated in the thermocouple.

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