JPS628547U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the changing device according to the present invention;
The figure is an explanatory diagram of the configuration and flow of operation on the operating device side.
The figure is an explanatory diagram of a conventional control circuit and an example of changing set values. 1... Gas accident prevention device, 2... Reed switch, 3... Control circuit, 4... Operating device (switching device), 5... Electromagnet, 6... Keyboard, 7...
...Control circuit, 8...LED, 9...Phototransistor, 10...Display.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A supply gas flow rate measuring device installed in the gas supply line, a supply gas emergency cutoff valve installed in the gas supply line, and a supply gas flow measuring device installed in the gas supply line, according to the amount of gas consumed. , the safe continuous use time of a single gas appliance can be memorized in advance, and the flow measuring device measures the overall gas flow rate at regular intervals, and if an increase is observed between the previous value and the current value. , the increase is taken as the consumption amount of one gas appliance newly started to be used, and if a decrease is recognized, the use of the gas appliance whose consumption is closest to the decrease is assumed to be stopped, and by this method. The gas consumption of each appliance currently in use can be determined, and the method detects that a new gas appliance with a larger gas consumption than any of the appliances currently in use has started to be used. As long as continued use of the appliance is allowed, we will continue to measure the continuous usage time from the time of the gas appliance, and if this measurement time exceeds the safe continuous usage time of the gas appliance, it will be determined that there is an abnormality. to issue a close signal to the emergency shutoff valve, or continuously measure the continuous use time of each gas appliance currently being used at the same time, and during this continuous use time, the corresponding continuous use is first stopped. When the safety time is exceeded, it is determined that there is an abnormality and a closing signal is issued to the emergency shutoff valve, or when there is a change in the overall flow rate of the supplied gas, the continuous use time is measured, When the continuous use time of the same flow rate until the next change occurs exceeds the memorized continuous use safe time for the gas consumption of the maximum gas consumption appliance in use, a close signal is sent to the emergency shutoff valve. In a gas accident prevention device comprising a control circuit configured to emit a reed switch, the control circuit includes a reed switch and an ON/OFF control circuit for the reed switch.
A circuit that reads the F pattern, judges this ON/OFF pattern, changes the set value of the safe continuous use time in the control circuit, and selects an appropriate constant from among different constants for each measurement unit of the flow rate measurement value. and a setting device with an electromagnet that continuously creates a magnetic field by turning on and off a switch button, and the magnetic field created by the electromagnet is turned on and off by bringing it close to the reed switch. Setting value changing device for gas accident prevention equipment. 2 After the settings have been changed by the setting value changing device, the reed switch on the control circuit side is turned on and off.
The F pattern is externally displayed by blinking an LED for emergency shutoff/warning display, and the blinking of this LED is read into a verification circuit through a phototransistor provided on the setting device side to judge whether the setting is correct or not. A set value changing device in a gas accident prevention device according to claim 1, which is configured to display the determination result on a display means.