JPH0646827B2 - Fluid cutoff control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention detects the outflow of raw gas at home and forgetting to turn off gas appliances by monitoring the state of changes in the gas flow rate in a gas supply path. The present invention relates to a fluid cutoff control device that closes a supply path to prevent an accident such as a gas explosion.

2. Description of the Related Art As shown in FIG. 3, a conventional device of the related art monitors a change state of a gas flow rate and compares the gas flow rate with an appropriate pattern of a gas flow rate and a usage time stored in advance (a gas appliance is used). By detecting the amount of change in the gas flow rate that changes each time and estimating the equipment used, it is compared with the normal usage time of the corresponding equipment stored in advance.) Judgment of the presence or absence of abnormality The control unit 1 is connected to a flow rate sensor 3 attached to the main body of the gas meter, which outputs a flow rate pulse each time a unit volume of gas is measured, and when the control unit 1 judges an abnormality, it shuts off the gas supply path. It had a configuration of driving the unit 2.

Problems to be Solved by the Invention However, in the above configuration, when a situation such as a slight gas leak from the gas hose or a hose disconnection occurs when the house is locked like when going out, a predetermined After a lapse of time, the shutoff unit 2 is activated to stop the outflow of gas. However, the gas has been outflowed into the room before the shutoff, and there is a risk that the gas will be filled in a narrow room. Therefore, there is a problem that there is a risk of explosion due to a spark of an electric product when returning home. Further, it is conceivable that the shut-off portion 2 is closed to go out when going out, but since the power source is made up of a battery, there is a problem that the battery is consumed more.

The present invention solves such a conventional problem. When going out (when each room is sealed and there is no need to use a gas appliance), an abnormality such as a leak from a gas hose occurs. Also aims to prevent gas from flowing out into the room.

Means for Solving the Problems In order to solve the above problems, a gas shutoff control device according to the present invention is provided in a gas supply line, and a flow rate that sends a flow rate pulse each time a gas of a predetermined unit measurement volume is measured. A sensor, and a shutoff unit for closing the flow path of the gas supply line,
The gas proper use condition is stored in advance, the use state is judged by the flow rate signal sent from the flow rate sensor, it is judged as abnormal if it deviates from the proper use condition, and a home monitoring mode for sending a closing signal to the shutoff unit and the above A control unit having an absence monitoring mode for sending a closing signal to the interruption unit when one pulse of the flow rate signal sent from the flow rate sensor is input, a means for switching the at-home monitoring mode and the absence monitoring mode, and a battery. The power supply unit is provided.

Operation The present invention, by the above-mentioned configuration, operates the switching means for switching the in-home monitoring mode and the absence monitoring mode when going out,
By inputting an instruction signal to the control unit, the control unit goes into the absence monitoring mode, and the shutoff unit operates only by inputting one pulse of the flow rate signal from the flow rate sensor, so even if there is a leak from the gas hose, etc. The amount of gas discharged is extremely small.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 denotes a flow rate sensor that emits a flow rate pulse each time a gas is measured in a predetermined unit measurement volume, 1
1 is a self-holding solenoid valve that closes the gas flow path of the gas supply line, 12 is a control unit, 13 is a changeover switch that switches between in-home monitoring mode and absent-monitoring mode, 14 is a microcomputer, and a flow rate sensor 10 in the in-home monitoring mode
By inputting the flow rate pulse signal from the device, detecting the amount of change in the gas flow rate that changes each time the gas appliance is used, and estimating the appliance used, normal use of the corresponding appliance stored in advance While comparing the time with the elapsed time currently used to determine whether there is an abnormality,
In the absence monitoring mode, if even one flow rate pulse is input, it is determined to be abnormal and a cutoff signal is sent to the transistor 16. Reference numeral 15 is an input circuit of the changeover switch 13. Reference numeral 16 is a transistor that drives the self-holding solenoid valve 11 in response to a cutoff signal from the microcomputer 14, and 17 is a battery for power supply. FIG. 2 shows the microcomputer 1.
4 is a flow chart showing the operation of No. 4 and is configured to send a cutoff output by performing a process of determining appropriate usage conditions in the at-home monitoring mode, and by inputting one flow rate pulse in the absent-monitoring mode. is doing.

In the above configuration, in the at-home monitoring mode of the microcomputer 14, the self-holding solenoid valve 11 is operated to operate the gas flow path when it is determined that there is an abnormal condition in which the usage state of the gas appliance is compared with an appropriate pattern stored in advance. Since it is closed, forgetting to turn off the gas appliance can be prevented. In the absence monitoring mode, if there is a gas leak, the self-holding solenoid valve 11 is promptly operated, so that gas outflow into the room can be prevented.

Effects of the Invention As described above, the gas cutoff control device of the present invention has the following effects.

(1) By providing an absence monitoring mode, even if there is a gas leak while going out, no gas will flow out into the room,
Secondary disasters can be prevented.

(2) Since the outflow of gas can be prevented without operating the shutoff valve to close the gas supply path when going out, there is no need to manually reset the self-holding solenoid valve, which is convenient.

(3) It is not necessary to operate the shut-off valve to close the gas supply path when going out, so battery consumption can be prevented.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a fluid cutoff control device according to an embodiment of the present invention, FIG. 2 is a flow chart showing the operation of a microcomputer, and FIG. 3 is a circuit diagram of a conventional fluid cutoff control device. 10 ... Flow rate sensor, 11 ... Cutoff part (self-holding solenoid valve), 12 ... Control part, 13 ... Switching means, 17 ...
… Power supply (battery).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Muramatsu 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takuo Shimada, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A flow sensor provided in a gas supply line for transmitting a flow rate pulse each time a gas of a predetermined unit measurement volume is measured, a shut-off portion for closing a flow path of the gas supply line, and proper use of gas. The conditions are stored in advance, the operating condition is judged from the flow rate signal sent from the flow rate sensor, it is determined that it is abnormal if it deviates from the proper use condition, and a home monitoring mode that sends a closing signal to the shutoff unit and the flow rate sensor A fluid cutoff control device comprising: a control unit having an absence monitoring mode for selecting a closing signal to the shutoff unit when one pulse of a flow rate signal to be sent is input; and switching means for switching between the in-home monitoring mode and the absence monitoring mode.