JP2013234764A - Gas cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily release a cooking container detection function by a release switch without complicating a configuration of a control section.SOLUTION: When an ignition/extinction button is operated by pressing, a control board is supplied with power supply at S1, and the control board is activated. Then, the control board determines whether or not a cooking container is placed on a trivet at S2. Here, if placement of the cooking container is not confirmed, ignition is prohibited at S4. After that, when turning ON of a release switch is confirmed by determination at S5, the control board releases a cooking container detection function and performs ignition control at S6.

Description

  The present invention relates to a gas stove such as a table stove and a built-in stove.

In a gas stove such as a table stove or a built-in stove, a cooking container detection means for detecting whether a cooking container such as a pan is placed on the virtues is provided for improving safety, and the cooking container detection means When the placement of the cooking container is not detected by the above, it is known that the combustion of the burner is prohibited (see, for example, Patent Document 1).
However, the gas stove of Patent Document 1 is provided with a release switch that can arbitrarily cancel the cooking container detection function so that the burner can be burned to perform cooking such as paste even when there is no cooking container. That is, when the release switch is turned on, the power supply is turned on to start the control circuit, and the release setting unit of the control circuit can accept the release of the cooking container detection function. If the ignition operation is performed within the time, the burner is burned even when there is no cooking container.

JP 2011-107996 A

  However, in the gas stove of Patent Document 1, it is necessary to turn on the release switch prior to the ignition operation so that the power supply is turned on and the release of the cooking container detection function can be accepted. For this reason, in the case of using a battery power source, a mechanism for supplying power to various control circuits when the release switch is turned on is required, which complicates the configuration of the control board and increases the cost. Moreover, since the release switch is requested to be turned on before the ignition operation, the user may feel uncomfortable.

  Therefore, an object of the present invention is to provide a gas stove that can easily release the cooking container detection function by the release switch without complicating the configuration of the control unit.

In order to achieve the above object, the invention described in claim 1 includes a burner to which fuel gas is supplied by an ignition operation, a control unit that is supplied with power by an ignition operation and performs ignition control on the burner, And a control unit that prohibits ignition control of the burner when the placement of the cooking container is not detected by the cooking container detection means after the power is supplied. A gas stove that is provided with a release switch for releasing the prohibition of the burner ignition control, and the control unit performs the ignition of the burner when the release switch is turned on in the prohibition state of the burner ignition control after the power is supplied. The prohibition of control is canceled.
According to a second aspect of the present invention, in the configuration of the first aspect, the control unit cancels the prohibition of the burner ignition control when the release switch is turned ON before a predetermined time has elapsed from the supply of power. It is a feature.

According to the first aspect of the present invention, since the cooking container detection function can be arbitrarily canceled by the release switch, the usability is improved. In particular, since the cancellation of the cooking container detection function is accepted after the power is supplied to the control unit by the ignition operation, the configuration of the control unit is not complicated, and the cancellation of the cooking container detection function by the release switch is easy. Can be done. In addition, since the release operation is performed after the ignition operation, the user does not feel uncomfortable.
According to the second aspect of the invention, in addition to the effect of the first aspect, since the prohibition of the ignition control of the burner is maintained unless the release switch is turned on before the predetermined time has elapsed since the power supply, the safety of the burner is maintained. Improvement can be expected.

It is the schematic of a gas stove. It is a flowchart of operation | movement of a gas stove. It is a flowchart of the example of a change of operation | movement of a gas stove.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing an example of a gas stove. In this gas stove 1, reference numeral 2 denotes a burner provided on the upper part of the container.
Further, the gas passage 3 to the burner 2 is provided with a cock switch 4 and a safety valve 5 from the upstream side. First, the cock switch 4 is turned on in response to a pressing operation of a fire extinguishing button (not shown) provided in front of the body, and outputs an ON signal to the control board 10. Next, the safety valve 5 is normally in a closed state in which the gas passage 3 is closed, and is moved to an open state in which the gas passage 3 is opened in accordance with the pressing operation of the fire extinguishing button. The valve open state is maintained.

Further, the gas passage 3 is partially branched on the downstream side of the safety valve 5 into a first passage 6 having a large flow passage cross-sectional area and a second passage 7 having a small flow passage cross-sectional area. 6, a first keep solenoid valve 8 capable of opening and closing the first passage 6 is provided. The first keep solenoid valve 8 opens and closes by energization control from the control board 10 when performing automatic heating power adjustment such as in the deep-fried food mode.
A second keep solenoid valve 9 is provided in the gas passage 3 after joining the first and second passages 6 and 7. The second keep solenoid valve 9 also opens and closes the gas passage 3 by energization control from the control board 10.

On the other hand, a thermocouple 11 and an ignition electrode 12 are provided in the vicinity of the burner 2. The thermocouple 11 outputs a thermoelectromotive force generated by being heated by the flame of the burner 2 to the control board 10. The ignition electrode 12 continuously sparks when the igniter 13 is operated by the control board 10 and ignites the burner 2.
Reference numeral 14 denotes a cooking container detection switch as cooking container detection means, which is turned ON / OFF according to the vertical position of a sensor unit (not shown) that protrudes upward at the center of the burner 2 and contacts the bottom surface of the cooking container. That is, when the sensor unit is in the raised position (when the cooking container is not placed on the virtues), it is turned off. When the sensor unit is in the lowered position (when the cooking vessel is placed on the virtues), it is turned on. The ON signal is output to the control board 10.

  The control board 10 as a control unit has a known configuration including a microcomputer, a drive circuit for each valve, an input circuit for each switch, a thermocouple circuit, an igniter operation circuit, a power circuit, and the like, and operates with a dry battery 15 as a power source. To do. A release switch 16 and a release confirmation lamp 17 are electrically connected to the control board 10. The release switch 16 and the release confirmation lamp 17 are provided in an operation unit provided on the front of the container. When the release switch 16 is pressed, an ON signal is input to the control board 10 and, as will be described later, If it is not confirmed that the cooking container is placed on the virtues, the cooking container detection function that prohibits ignition control is canceled. At the time of the release, the control board 10 lights the release confirmation lamp 17. 18 is a buzzer.

The operation of the gas stove 1 configured as described above will be described based on the flowchart of FIG.
When the point fire extinguishing button is pushed, the cock switch 4 is first turned on and the safety valve 5 is opened. In S1, power is supplied to the control board 10 and the control board 10 is started up. Then, the control board 10 discriminate | determines whether the cooking container detection switch 14 is turned ON by S2, ie, whether the cooking container is mounted on Gotoku. If it is confirmed that the cooking container detection switch 14 is turned ON, the control board 10 opens the second keep solenoid valve 9 and supplies the fuel gas to the burner 2 in S3, assuming that the cooking container is placed. At the same time, ignition control for igniting the burner 2 by operating the igniter 13 is performed.

  After the burner 2 is ignited, the thermoelectromotive force of the thermocouple 11 is monitored, and if it is equal to or greater than a predetermined threshold, the energization to the safety valve 5 is continued and the valve is held open. If it falls below the threshold value, it is assumed that a misfire has occurred, the power supply to the safety valve 5 is stopped and closed, the fuel gas supply is shut off, and the burner 2 is automatically extinguished.

On the other hand, if the ON of the cooking container detection switch 14 is not confirmed in the determination of S2, the second keeping solenoid valve 9 is not opened and the buzzer is set to prohibit ignition in S4, assuming that the cooking container is not placed on the virtues. Ring 18
Thereafter, when it is confirmed in S5 that the release switch 16 is turned on, the control board 10 releases the cooking container detection function and turns on the release confirmation lamp 17. In step S6, the control board 10 opens the second keep solenoid valve 9 to supply fuel gas to the burner 2, and performs ignition control for igniting the burner 2 by operating the igniter 13.

  Thus, according to the gas stove 1 of the said form, the cancellation | release switch 16 which cancels prohibition of the ignition control of the burner 2 is provided, and the control board 10 cancels | releases in the prohibition state of the ignition control of the burner 2 after power supply When the switch 16 is turned on, by canceling the prohibition of the ignition control of the burner 2, the cooking container detection function can be arbitrarily canceled by the release switch 16, so that the usability is improved. In addition, since the release of the cooking container detection function is accepted after the power is supplied to the control board 10 by the ignition operation, the configuration of the control board 10 is not complicated, and the cooking container detection function of the release switch 16 is improved. Release is easy. In addition, the release operation is performed after the ignition operation, so that the user does not feel uncomfortable.

In the above embodiment, if the release switch 16 is turned ON at any timing after the ignition is prohibited in S4, the cooking container detection function is released. However, as shown in FIG. When it is confirmed that the switch 16 is turned on, in S6, it is determined whether or not a predetermined time has elapsed since the power was turned on. If the predetermined time has not elapsed, the release confirmation lamp 17 is turned on and the ignition control is performed in S7. May be executed. That is, if a predetermined time has elapsed since the power is turned on in the determination of SS6, the ignition prohibition is continued in S8 without releasing the cooking container detection function.
As described above, in the modified example of FIG. 3, the control board 10 releases the prohibition of the ignition control of the burner 2 when the release switch 16 is turned on before a predetermined time has elapsed from the supply of power. Therefore, improvement in safety can be expected.

  In addition, the configuration of each part of the gas stove is not limited to the above-described form. For example, the present invention can be applied to a gas passage that does not have a first keep solenoid valve and does not have a bifurcated branch. Can be omitted. The release switch can also release the cooking container detection function by long pressing for several seconds.

  1 ... Gas stove, 2 ... Burner, 3 ... Gas passage, 4 ... Cock switch, 5 ... Safety valve, 6 ... First passage, 7 ... Second passage, 8 ... First keep solenoid valve 9 .. Second keep solenoid valve 10.. Control board 14. Cooking container detection switch 15 Dry battery 16 Release switch 17 Release confirmation lamp

Claims (2)

A burner to which fuel gas is supplied by ignition operation;
A control unit that is supplied with power by an ignition operation and performs ignition control on the burner;
Cooking container detection means for detecting the placement of the cooking container on the burner, and when the controller does not detect the placement of the cooking container by the cooking container detection means after the power supply, A gas stove that prohibits ignition control of the burner,
Provide a release switch to release the prohibition of ignition control of the burner,
The said control part cancels prohibition of the ignition control of the said burner, when the said release switch is turned ON in the prohibition state of the ignition control of the said burner after the supply of the said power supply.   2. The gas stove according to claim 1, wherein the control unit cancels prohibition of ignition control of the burner when the release switch is turned ON before a predetermined time has elapsed from the supply of the power.

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