JPH09133237A - Gas cutout gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wrong shutoff without stopping the use of gas. SOLUTION: This gas cutout gear is equipped with a gas alarm 5 which outputs, when detecting gas leakage, a gas leakage alarm signal to information means 6, and a gas leakage definite signal to a control part 10 for controlling a cutoff valve 2, and gas flow detecting means 8 for outputting a flow signal according to a passing gas amount. When such a condition can presume that the gas alarm 5 may wrongly alert, since being transmitted to invalid switching means 70, a signal by which the gas leakage definite signal is canceled by manual input, a passage may not be shut off by the cutoff valve 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off device for preventing a gas accident from occurring.

[0002]

2. Description of the Related Art A conventional gas shutoff device of this type will be described with reference to the drawings. In FIG. 4, 2 is a shut-off valve for opening and closing the gas passage, 5 is a gas alarm for detecting gas leakage, and 6
Is a notification means for issuing a gas leak warning, 4 is a gas meter to which the shutoff valve 2 is attached, 8 is a gas flow rate detecting means for detecting the gas flow rate, 10 is an abnormal signal from the gas alarm device 5 and the gas flow rate detecting means 8 is The control unit is configured to close the shutoff valve 2 according to the flow rate signal.

[0003]

However, in the above-mentioned conventional configuration, the gas alarm 5 malfunctions during cooking using gas, for example, by sensing alcohol when drinking, so that the shut-off valve may be shut off by mistake. Alternatively, there is a problem in that the use of gas must be temporarily stopped and the user has to wait for a while in order to avoid accidental interruption.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to automatically recognize a malfunction of the gas alarm device 5 without stopping the use of gas and prevent a false shutoff.

[0005]

In the gas shutoff device of the present invention, a gas alarm device for inhaling ambient air to detect a gas leak and outputting a gas leak warning signal and a gas leak confirmation signal, and the gas alarm. And an invalid switching means for invalidating the gas leak confirmation signal by manual input when it can be predicted that a false alarm will occur in the container.

According to the present invention, when the gas alarm is erroneously detected, the shut-off valve is not unnecessarily shut off and the usability is good.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In order to achieve the above object, the first means of the gas shutoff device of the present invention inhales ambient air to detect a gas leak, and outputs a gas leak warning signal and a gas leak confirmation signal. Gas alarm device, an alarm means that operates by the gas leak warning signal, a gas flow rate detection means that outputs a flow rate signal according to the amount of passing gas, and a manual input when it is predicted that the gas alarm device will give an erroneous alarm. An invalid switching means for invalidating the gas leak confirmation signal, a control unit for outputting a cutoff signal by the gas leak confirmation signal and the flow rate signal, and a cutoff valve for cutting off the gas passage by the cutoff signal. Is.

In addition to the above-mentioned structure, the second means of the present invention is, in addition to the above configuration, the invalidation switching means for measuring the time from when the gas leak confirmation signal is invalidated until the invalidation is canceled. It is equipped with.

Further, the third means of the present invention comprises, instead of the invalid switching means, a temperature detecting means for detecting the temperature around the equipment and for judging that the gas is in use when the temperature is equal to or higher than a predetermined temperature. It is a thing.

By the first means, the gas shutoff device of the present invention can ignore the false alarm of the gas alarm device by the signal for invalidating the gas leak confirmation signal of the alarm device from the outside.

Further, the second means makes it possible to automatically cancel the alarm disregard state after the timer count section has counted the timer for a predetermined period without an invalidation signal from the outside.

Further, the third means can automatically determine the alarm disregard state when the temperature around the gas table is equal to or higher than a predetermined temperature by the temperature detecting means instead of the invalid switching means from the outside.

An embodiment of the present invention will be described below with reference to the drawings. First, the gas shutoff device of the first embodiment is
When a gas leak of a predetermined concentration or more is detected, a gas leak warning signal is output to the notification means 6. After that, when the concentration continues for a predetermined period or more (for example, 40 seconds or more), it is determined that the gas leak is determined, and there is a gas alarm device 5 that outputs a gas leak determination signal to the control unit 10. This gas leak warning signal activates a notification device (for example, a signal indicating "gas is leaking" by a voice signal or a warning signal by an LED display), and a lead SW or an MR sensor depending on the amount of passing gas. A gas flow rate detecting means 8 for outputting a flow rate signal, and when liquor is used during cooking with gas or when liquor is smoked "
When the warning "gas is leaking" is output from the notification means 6, there is an invalid switching means 70 for invalidating the gas leak confirmation signal when a person judges that the gas alarm 5 is a false alarm and the gas leak confirmation signal is invalid. It is performed by manual input from the outside by communication from the disabling switch added to the alarm device 5 or a home home controller.

There is also a control unit 10 for outputting a shutoff signal in response to a gas leak confirmation signal from the gas alarm device 5 and a flow rate signal from the flow rate detecting means 8. The shutoff valve 2 shuts off the gas passage in response to a shutoff signal from the control unit 10.

Next, a second embodiment of the present invention will be described with reference to FIG. 2, constituent elements having the same functions as those in FIGS. 1 and 2 are designated by the same reference numerals. FIG. 2 is a control block diagram showing a gas shutoff device according to a second embodiment of the present invention.

In FIG. 2, the invalidation switching means 71 has a timer count section 11 and measures the time from the time when the gas leak confirmation signal is invalidated until the invalidation is canceled (for example, 1
0 minutes), the invalid switching means is automatically released to prevent forgetting to release the gas leak confirmation signal.

Next, a third embodiment of the present invention will be described with reference to FIG. In FIG. 3, constituent elements having the same functions as those in FIGS. 1 and 3 are designated by the same reference numerals. FIG. 3 is a control block diagram showing a gas shutoff device according to a third embodiment of the present invention.

In FIG. 3, when the temperature around the gas table is detected by a thermistor or the like instead of the invalidity switching means 70 of the first embodiment and the temperature is equal to or higher than a predetermined temperature (for example, 80 ° C. or higher), or like a gas table. There is a temperature detecting means 12 which installs a thermistor in a portion and judges that cooking is being performed using gas when the temperature is 100 ° C. or higher and invalidates the gas leak confirmation signal.

Even if there is a gas leak confirmation signal from the gas alarm device 5 when the alcohol is used during cooking using gas by the temperature detecting means 12 or when the alcohol is burned, the gas alarm device 5 malfunctions. The gas leak confirmation signal is ignored and the gas passage is not blocked.

As described above, according to the above-mentioned embodiment, there is an effect that the false shutoff can be avoided without stopping the use of the gas at the time of the false alarm of the gas alarm device 5.

[0021]

As described above, the gas shutoff device according to the first aspect of the present invention has the effect of preventing shutoff due to false gas leak detection of the gas alarm without manually stopping the gas by a signal from the outside. is there.

Further, the gas shutoff device according to the second aspect of the present invention has an effect of preventing forgetting to cancel the alarm disregard signal.

Further, in the gas shutoff device according to the third aspect of the present invention, the effect of detecting the rise in room temperature and preventing the shutoff due to the false detection of the gas leak of the gas alarm without automatically stopping the gas without human labor is provided. There is.

[Brief description of the drawings]

FIG. 1 is a control block diagram showing a gas shutoff device according to a first embodiment of the present invention.

FIG. 2 is a control block diagram showing a gas shutoff device according to a second embodiment of the present invention.

FIG. 3 is a control block diagram showing a gas shutoff device according to a third embodiment of the present invention.

FIG. 4 is a control block diagram of a conventional gas shutoff device.

[Explanation of symbols]

 2 shut-off valve 4 gas meter 5 gas alarm 6 informing means 8 gas flow rate detecting means 70, 71 invalidity switching means 11 timer counting section 12 temperature detecting means 10 control section

Front page continued (72) Inventor Kaoru Onishi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A gas alarm device that inhales ambient air to detect a gas leak and outputs a gas leak warning signal and a gas leak confirmation signal, an alarm means that operates by the gas leak warning signal, and a passing gas amount. A gas flow rate detection unit that outputs a flow rate signal in response to the gas leak detection signal, and an invalid switching unit that invalidates the gas leak confirmation signal by manual input when it can be predicted that the gas alarm device will give an erroneous alarm. A gas shutoff device comprising: a control unit that outputs a shutoff signal in response to a signal; and a shutoff valve that shuts off a gas passage in accordance with the shutoff signal. 2. The gas shutoff device according to claim 1, further comprising a timer count unit for measuring a time from when the gas leak confirmation signal is invalidated until the invalidation is canceled. 3. The gas shutoff device according to claim 1, wherein the invalidity switching means is a temperature detecting means for detecting the temperature around the equipment and determining that the gas is being used when the temperature is equal to or higher than a predetermined temperature.