JPH0646828B2 - Fluid cutoff control device - Google Patents

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, and detects abnormalities in the event of an abnormality. The present invention relates to a fluid cutoff control device that closes a gas supply passage 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.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, when the gas appliances are forgotten to be turned off, the gas supply path is closed without giving any notification to the user, and the gas appliances in the home are simultaneously stopped. Therefore, when the user recognized the interruption, there was a problem in terms of usability such as not being able to cook and not having a bath. In addition, when returning the shut-off portion, it is necessary to manually open the solenoid valve of the gas shut-off device after tightening all the cocks of the gas appliance, and there is a problem that it takes time to restore the shut-off portion. .

The present invention solves such a conventional problem, and an object of the present invention is to notify the user in advance of interruption by the interruption unit, reduce the number of interruptions due to forgetting to turn off the appliance, and eliminate the disadvantage of usability. And

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 flow rate per unit time is calculated from the flow rate signal sent from the flow rate sensor and the gas flow rate change amount is calculated by a calculating means and a pre-stored time setting data corresponding to the flow rate change and a continuous use elapsed time comparing means. It has a control unit configured by a microcomputer that determines a usage state and sends a preliminary notification output when the time setting data> the continuous use elapsed time, a preliminary notification unit that notifies the outside by the preliminary notification output, and a battery. The power supply unit is provided.

Operation According to the present invention, with the above-described configuration, the microcomputer compares the time setting data according to the flow rate change amount with the current elapsed time, determines the remaining time until interruption, and notifies the user by the advance notification means. Since the advance notification is given, the number of times of interruption can be reduced.

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 a gas supply line, 12 is a control unit, 13 is an advance notification means such as a buzzer that gives advance notification to the user, and 14 is a microcomputer that detects the flow rate from the flow sensor 10. By inputting a flow rate pulse signal, detecting the amount of change in the gas flow rate that changes each time the gas appliance is used, and estimating the appliance used, the normal usage time of the corresponding appliance stored in advance ( The time setting data) is compared with the elapsed time used to determine whether or not there is an abnormality, the remaining time until interruption is determined, and the advance notification output is sent when the time setting data> the elapsed time. Reference numeral 15 is a notification drive circuit for driving the advance notification means 13 by the advance notification output from the micro computer 14. 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 is a flow chart showing the operation of the microcomputer 14, and when the gas appliance is in use, the elapsed time in the state where there is no change in the flow rate is compared with the pre-stored time setting data, and it is judged to be abnormal The advance notification is output 5 minutes before the time. After the advance notification output, if there is no change in the flow rate, it will be cut off, and when the user stops the gas appliance after the advance notification output, the flow rate change will appear, the elapsed time timer will be cleared, and the advance notification output will also be stopped. Is configured as follows.

In the above configuration, the micro computer 14 can grasp the remaining time until the interruption, and by notifying in advance, the user can take measures such as closing of the gas appliance and the interruption. It can be prevented. Further, since the notification is automatically canceled by the user performing a procedure such as closing the gas appliance, the user can confirm that the appropriate procedure has been performed.

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

(1) Since the user can be informed in advance, it is possible to take prior action when the gas appliance is forgotten to be turned off, and it is not necessary to perform a troublesome return operation.

(2) Since the frequency of interruption is reduced, the power consumption by the interruption valve, which consumes a large amount of current, is reduced, and the consumption of the battery can be prevented.

(3) It is easy to use because it is possible to eliminate cases where you do not notice the interruption while you are using other equipment while boiling the bath.

(4) If the user recognizes this by operating the gas appliance to deal with forgetting to turn it off, the notification automatically stops, so it is possible to let the user know that it was dealt with correctly. it can.

[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 liquid cutoff control device. 10 ... Flow rate sensor, 11 ... Shutoff unit (self-holding solenoid valve), 12 ... Control unit, 13 ... Advance notification 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 rate sensor which is provided in a gas supply line and which emits a flow rate pulse each time a gas of a predetermined unit measurement volume is measured, a shutoff section which closes a flow path of the gas supply line, and the flow rate sensor. Proper use of gas by means of calculating the flow rate per unit time and the amount of change in gas flow rate from the flow rate signal sent from Fluid cutoff, which comprises a control unit composed of a microcomputer that outputs a preliminary notification output in a state where the time setting data is larger than the continuous use elapsed time, and a preliminary notification unit that notifies the outside by the preliminary notification output. Control device.