JPS63131921A - Combustion apparatus - Google Patents

Abstract

PURPOSE:To provide a combustion apparatus operated safely even if a switch is turned on by mistake by installing a key input circuit whereby the time required to operate after an ignition and extinction switch is pressed down is longer at ignition than at extinction. CONSTITUTION:A button 9 for ignition and extinction is pressed down. When it is pressed down for 0.2 second or more, a key input circuit 21 in a microcomputer 20 judges that a key input exists, but for less than 0.2 second the circuit judges that there is no key input. Therefore, even if the button 9 is touched for less than 0.2 second by mistake, the operation does not start. When the button 9 is pressed for 0.2 second or more to turn on a light touch switch 11, a motor cock 15 is set at an open position to open a solenoid valve 14 and start combustion. When the button 9 is pressed down during the combustion for 0.05 second or more, the combustion is stopped. Thus, as for the time for the ignition and extinction switch to operate, the switch is not operated if the button is pressed down for a longer time only at the ignition time and therefore, only when pressing down operation is applied surely on the button, the combustion is started and safety is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustion control device for gas combustion appliances and the like.

BACKGROUND OF THE INVENTION In recent years, electronic technology has been introduced to gas appliances to improve convenience and safety, and the number of combustion appliances equipped with electronic control devices is increasing. Many of these devices are still equipped with light touch controls that can be operated with just a slight push.

As an example, by using a microcomputer (hereinafter referred to as microcomputer), by lightly pressing a switch, it is possible to automatically open a solenoid valve, etc., and easily carry out combustion.

Problems to be Solved by the Invention However, these appliances are very convenient because they do not require the conventional gas cock to start combustion and can be started by simply pressing a switch, but on the other hand, they do not require the use of a conventional gas cock to start combustion. It is dangerous because even a slight touch of a switch will cause it to start burning.

In view of the above-mentioned problems, the present invention provides a combustion appliance that is safe even when the switch is accidentally turned ON at unexpected times.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion appliance of the present invention has a key input circuit in which the time from when the ignition/extinguishing switch is pressed until it is activated is longer when igniting than when extinguishing. It is prepared.

Operation Page 3 The present invention is equipped with the circuit described above, so that even if a part of the body or the like touches the automatic reset type Nuitch and turns it on, it will not operate and unexpected combustion will occur unless it is turned on for a certain period of time. There is no.

EXAMPLE A combustion appliance according to an example of the present invention will be described below with reference to the drawings. Figure 1 shows a gas staple, which is a combustion appliance. 1 is the gas staple body, 2 is the right burner,
3 indicates the left burner, 4 indicates the grill, and 5 indicates the operation panel. 6
indicates a fire power display lamp on the operation panel, 7 and 8 indicate fire power setting buttons, and 9 indicates an ignition/extinguishing button (hereinafter referred to as an ignition/extinguishing button). Further, FIG. 3 shows a sectional view of the on/off button part, where 10 is a printed circuit board and 11 is an automatic return type light touch switch operated by the on/off button 9. Further, 12 indicates a resin case of the operation panel, and 13 indicates a membrane sheet. Figure 4 shows these gas circuit diagrams and Figure 5.
The figure shows the control circuit diagram. 14 is a solenoid valve which is a fuel control valve, 15 is a motor cock, and 16 is a burner. Also, 1
7 is a 100V power supply, 18 is a fuse, 19 is a transformer 7.
2o indicates a microcomputer with a built-in key input circuit 21.

FIG. 6 shows the sequence of the key input circuit housed in the microcomputer 20.

These operations will be explained based on the drawings. Press the first extinguish button 9. o. If the key is pressed for 2 seconds or more, the key input circuit 21 of the microcomputer 20 determines that the key is pressed manually, but if it is pressed for less than 0.2 seconds, it does not determine that the key is pressed manually. Therefore, even if you accidentally touch the extinguishing button 9 at this point for less than 0.2 seconds, it will not turn off. Then, when the light touch switch 11 is turned on by pressing the ignition/extinguishing button 9 for 0.2 seconds or more, the igniter (not shown) is discharged, the motor cock 15 is set to the open position, and the solenoid valve 14 is opened to cause combustion.

If the ignition/extinguishing button 9 is pressed during combustion for 0.05 seconds or more, combustion will be stopped. Still burning, firepower setting button 7
．． When 8 is pressed, the desired firepower is obtained by the motor cock 15 and displayed by the firepower display lamp 6. This firepower setting button 7.8 is activated if it is pressed for 0.05 seconds or more. Here, for example, if the spring/L15 on page 5 of Operation is dirty and cleaned, the dirt is wiped off with a cloth, but at that time, the time during which the ignition/extinguishing switch, etc. is turned on with the cloth is generally about 0.1 seconds or less. It is. Therefore, combustion will not start even during cleaning. However, generally the time for which the light touch switch is pressed is 0.1 to 0.2 seconds. Therefore, the configuration is such that it is activated by pressing the button for 0.05 seconds or more except when igniting. Note that the ignition/extinguishing buttons 9 may be used for ignition and extinguishing separately.

Effects of the Invention As described above, in the present invention, the ignition/extinguishing switch is activated only when igniting, so that it does not operate unless the switch is pressed for a long time. Will not start or burn when cleaning.

Therefore, combustion is started only when there is an intention to press the button to cause combustion, thereby ensuring not only convenience but also safety.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a gas staple which is an embodiment of the combustion appliance of the present invention, Fig. 2 is an enlarged plan view of the same display section, Fig. 3 on page 6 is a sectional view of the extinguishing button section, and Fig. 4 is the same. The gas circuit diagram, FIG. 5 is the same control circuit diagram, and FIG. 6 is the same sequence diagram. 2... Burner, 11... Light/extinguish switch (light/touch switch), 14... Solenoid valve (fuel control valve), 20... Microcomputer (control circuit), 21...key input circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 6
Figure=114-

Claims (1)

[Claims] a burner, a fuel control valve disposed in a combustion passage to the burner, a control circuit for controlling the fuel control valve, and an automatic return type ignition/extinguishing switch for starting and stopping combustion using the control circuit; and a key input circuit in which the push time for activating the fuel control valve when the fire extinguishing switch is pushed is longer when igniting and shorter when extinguishing.