JP2018071926A - Gas cooking stove device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a gas burner may be not extinguished as a solenoid opening/closing valve is not completely closed due to opening failure of the solenoid opening/closing valve, even through an operation to close the solenoid opening/closing valve is performed, in an automatic fire extinguishing function to automatically extinguish the gas burner by closing the solenoid opening/closing valve at a gas cooking stove device side without human operation, for example, in an automatic cooking mode and a timer mode.SOLUTION: An automatic valve closing function for stopping supply of a gas to a gas burner by closing a valve, when an ignition state of the gas burner is detected by a flame detector even after a closing operation of a solenoid safety valve, is additionally disposed on a fire adjustment portion.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a gas stove apparatus in which ignition to a gas burner is performed by manual operation, and thermal power adjustment after ignition is performed by an electric thermal power adjustment unit.

  In the supply path for supplying gas to the gas burner, the valve body is forcibly opened at the time of ignition, and when the gas burner is ignited, there is an electromagnetic on-off valve such as an electromagnetic safety valve that holds the valve body in an open state by electromagnetic force. Is provided. Since a relatively large amount of electric power is required to change the valve body of this electromagnetic on-off valve from the closed state to the open state by the electric mechanism, for example, in a gas stove device using a dry cell as a power source, the valve body is opened by manual operation. A mechanism for valve operation is employed. In order to prevent redundant leakage of gas to the gas burner when the electromagnetic on-off valve is closed, a main valve is provided in series with the electromagnetic on-off valve. The original valve is manually opened by an ignition operation, and is kept mechanically open during ignition, and is closed during a fire extinguishing operation.

  On the other hand, it is desirable to adjust the heating power at the time of cooking after ignition so that the amount of gas supplied to the gas burner can be increased or decreased by electric drive in order to realize automatic cooking (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2015-129626 (FIG. 3)

  The above-described apparatus that performs the thermal power adjustment electrically can include an automatic cooking mode in which the thermal power adjustment is automatically performed so that the thermal power is set in advance as time passes. In this automatic cooking mode, when the automatic cooking is completed, the electromagnetic on-off valve is closed to shut off the supply of gas to the gas burner and the gas burner is automatically extinguished. In addition to the automatic cooking mode, a timer mode can be provided, and when the set time has elapsed, the electromagnetic on-off valve can be closed to automatically extinguish the gas burner.

  However, when the automatic open / close valve is equipped with an automatic fire extinguishing function that automatically closes the open / close valve on the gas stove device without the user's operation, such as the automatic cooking mode or timer mode, Even if the operation of closing the valve is performed, the electromagnetic on-off valve is not completely closed due to an open failure of the electromagnetic on-off valve, so that there is a possibility that the gas burner does not extinguish.

  In addition, since the said main valve is hold | maintained in the valve opening state until manual fire extinguishing operation is performed, supply of gas cannot be interrupted | blocked at the time of automatic fire extinguishing. In addition, if a new separate solenoid on-off valve is added in series, the above problem can be solved, but not only a space for providing a new electromagnetic on-off valve is required, but also a new electromagnetic on-off valve is added. It cannot be adopted because of the problem of high costs.

  Then, this invention makes it a subject to provide the gas stove apparatus which can raise the redundancy at the time of automatic fire extinguishing, without increasing cost and a new installation space as much as possible in view of said problem.

  In order to solve the above-described problems, a gas stove device according to the present invention has a thermal power control unit that manually performs an ignition operation to a gas burner and electrically adjusts the amount of gas supplied to the gas burner after ignition. And an electromagnetic on-off valve that is held open while the ignition state of the gas burner is detected by a flame detector provided in the vicinity of the gas burner, and a source that is held open from ignition operation to fire extinguishing operation A gas stove device equipped with a valve has an automatic fire extinguishing function, and when the automatic fire extinguishing function is activated, the electromagnetic on / off valve is closed at a predetermined fire extinguishing timing. When the flame detector detects that the gas burner is still in an ignition state even when the valve is closed, the valve is closed and the gas supply to the gas burner is stopped. The dynamic valve closing function, characterized in that added to the combustion control unit.

  By adding an automatic valve closing function to the heating power control unit, the automatic valve closing function can be activated during the operation of the automatic fire extinguishing function. Accordingly, when the gas burner does not extinguish even when the operation of closing the electromagnetic on-off valve is performed, the gas valve burner is surely extinguished by shutting off the gas supply to the gas burner by the automatic valve closing function of the heating power control unit.

  If it is determined that the gas burner has left fire after performing the operation to close the solenoid on-off valve, and if it takes time for the automatic valve closing function of the thermal power control unit to work and extinguish the fire, There is a risk that cooking utensils such as pots will be heated unnecessarily. Therefore, when the electromagnetic on-off valve has an open failure, the electromagnetic on-off valve is closed by the automatic fire extinguishing function, and at the same time, the heating power adjusting unit is provided with an automatic heating power changing means for reducing the opening of the heating power control unit to an opening corresponding to a small fire. It is desirable to minimize unnecessary heating of cooking utensils.

  As can be seen from the above description, the present invention is based on the fact that when the automatic fire extinguishing function is activated, if the electromagnetic on / off valve fails to open and the gas burner cannot be automatically extinguished, the thermal power control unit does not add a new electromagnetic on / off valve. Since the gas burner can be automatically extinguished reliably, the redundancy of automatic extinguishing can be increased.

The figure which shows the structure of one embodiment of this invention Piping diagram inside gas stove Perspective view of the gas cock IV-IV cross section V-V cross section

  With reference to FIG. 1, 1 is an example of the gas stove device by this invention, Comprising: It is what is called a built-in type inserted in the countertop of a kitchen. The top surface of the gas stove device 1 is covered with a top plate 11. Three large and small gas burners 12 are attached to the top plate 11.

  The point fire extinguishing operation and the thermal power adjustment operation for each gas burner 12 are performed by the thermal power adjustment knobs 13 provided for each gas burner 12, and these three thermal power adjustment knobs 13 are arranged on the front surface of the gas stove device 1. Similarly, another thermal power adjustment knob 15 is disposed on the front side to perform point-extinguishing and thermal power adjustment of the gas burner 14 disposed inside the grill cabinet provided in the gas stove device 1.

  In this gas stove device 1, the heating power of the gas burner 12 can be automatically adjusted, and the gas burner 12 in the ignition state can be automatically extinguished. This automatic cooking mode can be selected by operating various switches provided on the operation panel 2.

  For example, a switch 21 for selecting an automatic cooking mode is provided on the operation panel. When the gas burner 12 is in an ignition state and the automatic cooking mode is selected by the switch 21, the heating power of the gas burner 12 is preliminarily determined as time passes. It is configured to automatically extinguish the gas burner 12 when the cooking power is adjusted to the set heating power and the automatic cooking is finished after a predetermined time. Further, a switch 22 for selecting a timer mode is provided. Similarly, when the timer mode is selected when the gas burner 12 is in an ignition state, the gas burner 12 is automatically extinguished when a set time has elapsed. It is configured.

  Referring to FIG. 2, each of the three gas burners 12 and the gas burner 14 in the grill cabinet are piped in parallel with each other. For example, a thermal power control device 3 is provided in a branch pipe that supplies gas to one gas burner 12. Is arranged.

  An electromagnetic safety valve (electromagnetic on-off valve) 31 and a main valve 32 that are forcibly opened by the pushing force generated by the ignition operation when the ignition control knob 13 is pushed in to perform an ignition operation are provided in the heating power control device 3. It has been. Further, a thermal power adjustment unit 4 whose opening degree is adjusted by an electric motor 41 is provided on the downstream side of the main valve 32, and the opening degree of the thermal power adjustment unit 4 is adjusted by operating the motor 41. The amount of gas supplied to the gas burner 12 is increased or decreased.

  Referring to FIG. 3 and FIG. 4, the thermal power adjustment knob 13 is in a state where it does not protrude from the front surface of the gas stove device 1 in the fire extinguishing state (FIG. 4 (a)). When the operation is performed (FIG. 4B), the sliding member 34 moves to the back side together with the heating power adjustment knob 13. Then, the intermediate member 35 on the far side is further pushed to the far side by the sliding member 34, and the rod 36 is moved to the far side.

  A main valve 32 is attached to an intermediate position of the rod 36. When the rod 36 is moved to the back side by an ignition operation, the main valve 32 is changed from the closed state to the open state. Further, the distal end of the rod 36 forcibly pushes the valve body of the electromagnetic safety valve 31 to open the valve, so that at the time of ignition operation, gas passes from the electromagnetic safety valve 31 and the main valve 32 through the thermal power control unit 4 to the gas burner. 12 is supplied. When the gas burner 12 is ignited in this state, a thermocouple as a flame detector (not shown) detects the ignition state of the gas burner 12, and adsorbs and holds the valve body of the electromagnetic safety valve 31 in an open state by electromagnetic force. Thereby, the ignition operation for the gas burner 12 is completed.

  When the ignition is completed, by releasing the pushing force to the thermal power adjustment knob 13, the thermal power adjustment knob 13 protrudes to the front side and the thermal power adjustment is possible (FIG. 4C). At that time, the sliding member 34 moves forward together with the heating power adjustment knob 13, but the intermediate member 35 is regulated at a midway position toward the front. This restricting position is a position where the main valve 32 provided on the rod 36 is in an open state and the tip of the rod 36 does not interfere with the closing of the valve body of the electromagnetic safety valve 31. Therefore, when the automatic cooking mode or the timer mode as described above is selected in this heating power adjustment state and the automatic fire extinguishing function is activated to release the adsorption hold of the electromagnetic safety valve 31 to automatically extinguish the gas burner 12, the main valve 32 is opened. If the electromagnetic safety valve 31 is normal in the valve state, the electromagnetic safety valve 31 is closed and the supply of gas to the gas burner 12 is shut off. However, if an open failure has occurred in the electromagnetic safety valve 31, the supply of gas to the gas burner 12 cannot be shut off. Reference numeral 33 denotes an operation amount sensor for detecting the rotation operation amount of the thermal power adjustment knob 13.

  Referring to FIG. 5, the thermal power adjustment unit 4 is configured to drive the motor 41 in proportion to the thermal power adjustment operation amount detected by the operation amount sensor 33 and to advance and retract the core 42. When the core 42 moves forward, the needle valve 43 moves forward by being pushed by the core 42 and throttles the amount of gas supplied to the gas burner 12. In the present embodiment, the seal member 44 for blocking the gas is attached to the end face on the tip side of the needle valve 43. Therefore, as described above, when the thermocouple detects that the electromagnetic safety valve 31 is not open and the gas burner 12 does not extinguish when automatically extinguishing the fire, the needle valve 43 of the heating power control unit 4 is advanced by the seal member 44. The supply of gas to the gas burner 12 was cut off.

  It should be noted that it takes a certain time until the gas burner 12 is determined not to extinguish after the adsorption hold at the electromagnetic safety valve 31 is released and is automatically extinguished by the thermal power control unit 4. If the heating power of the gas burner 12 is large during that time, the cooking utensil such as a pan will be unnecessarily heated.

  Therefore, when the fire is automatically extinguished, the opening degree of the heating power control unit 4 is reduced, and even if the electromagnetic safety valve 31 is opened and the gas burner 12 cannot be automatically extinguished, the gas is supplied by the seal member 44. It was made to reduce that the cooking utensil was continuously heated unnecessarily for a predetermined time until the interruption.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention. For example, in the above embodiment, the case where the automatic cooking mode or the timer mode is selected has been described as the case where the automatic fire extinguishing function is activated. The automatic fire extinguishing function can be activated even in a kettle mode that automatically extinguishes when it continues for a predetermined time.

DESCRIPTION OF SYMBOLS 1 Gas stove device 2 Operation panel 3 Thermal power control device 4 Thermal power control part 11 Top plate 12 Gas burner 21 Switch (for automatic cooking mode selection)
22 switches (for timer mode selection)
31 Electromagnetic Safety Valve 32 Original Valve 33 Operation Amount Sensor 34 Sliding Member 35 Intermediate Member 36 Rod 41 Motor 42 Core 43 Needle Valve 44 Seal Member

Claims (2)

  A flame detector provided in the vicinity of the gas burner that has a heating power adjustment unit that manually performs ignition operation to the gas burner and electrically adjusts the gas supply amount to the gas burner after ignition, and is opened by the manual ignition operation. A gas stove device that has an electromagnetic on-off valve that is held open while the ignition state of the gas burner is detected by a gas valve, and a main valve that is held open from the ignition operation to the fire extinguishing operation, has an automatic fire extinguishing function When the automatic fire extinguishing function is activated, the electromagnetic on / off valve is closed at a predetermined fire extinguishing timing, and the gas burner is in an ignited state even if the electromagnetic on / off valve is closed by the automatic fire extinguishing function. When the flame detector detects this, an automatic valve closing function for closing the gas supply to the gas burner is added to the heating power control unit. Sukonro apparatus.   The automatic heating power changing means for reducing the opening degree of the thermal power control unit to an opening degree corresponding to a small fire when the electromagnetic on-off valve is closed by the automatic fire extinguishing function. Gas stove device.

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