JPS61173022A - Home security gas meter - Google Patents

Abstract

PURPOSE:To check and detect the abnormal conditions in use of gas devices by installing a microcomputer, sensors to detect the blow-out of fire and sensors to detect the opening and closing states at gas cacks in such a way that logical multiplications of signals at sensor's contacts are taken out and detected. CONSTITUTION:Gas devices 15 (No.1, No.2 ... No.n-1, No.n) are connected to high pressure gas bomb source via gas distributing pipe 12, gas flow measur ing part 14 (where a microcomputer is installed) and pipe 11 an the side of high pressure gas bomb source. N gas devices No.1, No.2 ... No.n-1, No.n are connected to pipe 12 via gas plugs 13. The microcomputer 10 installed in the gas flow measuring part 14 is connected to (n) signal lines 1. 2 ... (n-1), (n) from N gas devices and scans (n) signal lines at a constant time internal successively. When the computer picks up a logical multiplication signal from scanned signal lines, the computer indicates the detected terminal and operates the alarm circuit simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a home security gas meter that performs explosion-proof monitoring, etc. by introducing electrical contact signals from a sensor into a microcomputer.

Conventionally, for gas appliances such as gas ranges that handle flammable gases or gas burners used in factories, for example, various gas equipment standards and general high-pressure gas handling standards have been established by ministerial ordinance from the perspective of explosion-proof safety management from gas leaks. .

Such security management is necessary when installing gas appliances, regardless of whether they are used in a factory or a general home.
It is essential that it be relatively easy to implement, economical, and highly reliable.

The present invention is intended to provide an economical home security system that can monitor and provide alarms or indicators for misfire events, such as when using gas, in connection with said gas source.

[Conventional technology]

Conventionally 9 For example, as part of building management, a common high-pressure gas cylinder and a microcomputer are installed in the gas flow rate measuring unit directly connected to the gas source, and gas sensors are installed at gas usage points, etc., to perform comprehensive explosion-proof management mainly due to gas leakage. ing.

However, such systems are limited to specific large-scale users, and there are no examples of them being applied to combustion appliances (stoves) for cooking rice in general households.

Furthermore, no consideration is given to ensuring security in the event that a gas stove in use misfires or otherwise occurs due to operational errors or accidental malfunctions of gas appliances.

[Problem that the invention seeks to solve]

Home security related to the use of high-pressure gas, for example, prevention of explosions due to gas leaks due to misfires, prevention of fires during earthquakes, etc., involves monitoring and detecting abnormal situations in the use of gas appliances.

(Means for Solving the Problem) The problem described above is that in a home security monitoring device that supplies flammable gas from a cylinder source to a terminal gas appliance through a gas valve, a microcomputer and a device that prevents misfires in gas appliances are used. This problem is solved by the home security gas meter of the present invention, which is equipped with a sensor for detecting the open/closed state of a gas valve, and monitors by extracting the AND of the contact signals of the respective sensors.

[For production] Normal usage conditions for gas appliances Condition (1) The gas valve is open.

Condition (2) The gas appliance is lit.

To be. On the other hand, what is abnormal usage?

Condition (1) The gas valve is open.

Condition (2) The gas appliance has misfired.

That is, the latter 6 is a gas leak state during opening of the valve. The present invention
Using the contact signal of the sensor that detects the open/closed state of the gas valve according to condition (1) and the contact signal of the sensor that detects a misfire according to condition (2), the logical product of these signals is extracted and computer-processed to improve security. That's what surveillance does.

〔Example〕

An embodiment of the security gas meter of the present invention will be described below with reference to the drawings.

Figure 1 shows a security monitoring system for each gas appliance using a microcomputer 10 installed in the gas flow rate measuring section, which is the main part of the gas supply piping system, and Figures 2 and 3 show the security monitoring system installed in each gas appliance. FIG. 3 is a schematic circuit diagram for acquiring AND signals from the contacts of each sensor.

In Figure 1, + MILL N12-・IVkLn-
Each of Lll & Ln is a gas appliance 15, which is connected to a high-pressure cylinder source (not shown) via a gas distribution pipe line 12, a gas flow rate measuring section 14 (in which a microcomputer 10 is installed), and a pipe 11 on the high-pressure cylinder source side. Ru.

Also, n gas appliance magnets 111h2...! 1kLn-1
+ Each of the magnetic n.

It is connected to the piping line 12 via a gas valve 13.

The microcomputer 10 installed in the gas flow rate measuring section 14 shown in FIG. 1 has one signal line 1, 2, . ---In-Ln is connected.

The signal line monitors whether each gas appliance is operating normally or abnormally.

FIG. 2 is a schematic circuit embodiment diagram for extracting an AND contact signal from the monitoring signal line. In the figure, 100 is a bimetal contact (thermocouple) that is attached to the stove (or resin) and detects the presence or absence of a gas flame.

Reference numeral 110 is a mechanical contact, such as a microswitch, for detecting the closed position of the gas valve 13 when the gas valve 13 is operated.

The contact state in the figure is an AND signal in which the mechanical contact 110 is closed under the condition (1) in which the gas valve is open, and the bimetal contact portion 100 is closed under the misfire condition (2) in which the gas appliance is not lit. indicates the abnormal usage status obtained.

However, if the gas appliance is ignited under the condition (1), the bimetallic contact portion 100 will open and the signal line connection terminal 1 will open.
During the period of 20, the logical product signal is not acquired, which is a normal usage state.

In other words, the logical product signals of the series contacts provided at the terminals of gas-using appliances are taken out, and their presence or absence is monitored all at once by the micro combinator of the flow rate measurement section provided in the central collection section of the gas piping.

The microcomputer 10 has one connected signal line 1, 2 .・-+ n-L n is sequentially scanned at fixed time intervals, and a gas appliance terminal with the AND signal is detected from the signal line during the scanning, and the detected terminal is displayed on a display device (not shown), and at the same time, an alarm circuit is activated. It is set to work.

The embodiment shown in FIG. 3 is a schematic diagram of a circuit configuration in which the AND signal shown in FIG. It is a circuit diagram. As the battery 90 shown in the figure, a battery for gas ignition installed on the gas appliance side may be used.

Optical cable signal! 140 is a signal line with the wire configuration explained in Figure 1, which has problems in terms of explosion protection such as spark discharge due to the potential difference between ground and ground, so this problem is improved by using an optical cable, and it is a safe and highly reliable security cable. Monitoring will take place.

〔Effect of the invention〕

According to the microcomputer-controlled home security gas meter of the present invention, which has a monitoring function that inputs the usage status of each gas appliance, home security against gas leaks, etc., including the gas piping system from the high-pressure cylinder source to the gas usage terminal can be achieved. It is possible to provide a monitoring system that is economical and safe from an explosion-proof perspective.

[Brief explanation of drawings]

FIG. 1 is a diagram configuring a security monitoring system for each gas appliance using a microcomputer 10 installed in a gas flow rate measuring section. FIG. 2 is a schematic % formula for extracting an AND signal from a gas appliance. FIG. 3 is a schematic diagram of an embodiment of a circuit for extracting an AND signal using an optical cable. In the figure, 10 is a microcomputer. 11 is the piping path on the cylinder source side. 13 is a gas valve, 15 is a gas appliance. 100 is a misfire detection sensor. and 110 are gas valve sensors.

Claims (1)

[Claims] A home security monitoring device that supplies flammable gas to a terminal gas appliance through a gas valve, comprising a microcomputer, a sensor for detecting a misfire in a gas appliance, and a sensor for detecting an open/closed state of a gas valve, and A home security gas meter characterized in that the logical product of contact signals of each sensor is extracted and monitored.