| 摘要 |
The present invention informs a user of an opening state of a gas valve in a sound when the user goes out in the state in which the gas valve is opened. Therefore, accidents which can be generated when the gas valve is not closed can be prevented. In the past, a visual alarm such as an LED, or the like attached to the gas valve and wireless communications were used to inform the user of the opening and closing of the gas valve. Therefore, the user cannot know the opening and closing of the gas valve if the user did not see the opened gas valve and went out or cannot use the wireless communications due to an error of a network. To solve the inconvenience, the present invention comprises; a switch unit which is operated with the opening and closing of the gas valve; an output unit which can be checked with sounds and light; and a circuit wherein the switch connected to a door is connected in series. (Both sounds and light are used as an output. At that time, a plurality of output units is connected in parallel to apply same voltage to all output units.) If the user opens the door to go out in the state in which the gas valve is opened, the circuit is operated and the sounds or light which informs the user of the opening of the gas valve is generated. Therefore, the user checks the state of the gas valve and an accident can be prevented in advance. |
