JPH01308574A - Fluid control device - Google Patents

Abstract

PURPOSE:To decrease the consumption of a battery as much as possible, by a method wherein, on a fluid control device, a setting circuit for a fluid monitoring mode is provided, and an input terminal is provided apart from an input terminal for an external sensor, and a signal from an entrance checker is thus received. CONSTITUTION:When a switch 12 for an absence mode is turned on, an absence mode signal is transmitted by a transmission circuit 13 and inputted on a setting circuit 7 for a fluid monitoring mode in a control circuit 2 of a fluid control device 9. The setting circuit 7 for the fluid monitoring mode is a NAND gate 7' for both the absence mode signal and an output signal from a decision circuit 6 for fluid flowing. The former is the absence mode signal from a checker 11 and the latter is the fluid flowing signal from the decision circuit 6 through an inverter 7'''. When these signals are inputted on the NAND gate 7', they are outputted from the gate 7' and inputted on the decision circuit 6 as a shutting command. Since the decision circuit 6 outputs a shutting signal and a display signal, a shut-off valve 4 starts and a visual display unit 5 indicates it. When the absence mode is set, it is necessary that an instant shutting mode is preset on the decision circuit 6 through the inverter 7'''.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to fluid control for controlling passages of fluids such as city gas and LP gas.

BACKGROUND OF THE INVENTION Conventionally, this type of technology includes, as shown in FIG. 2, a flow rate detector 3 interlocked with a gas metering device inside a gas meter 1;
It consists of a control circuit 2' that measures and determines the flow rate, a cutoff valve 4 that cuts off the gas passage, and a display 5 that displays the reason for the cutoff. ' calculates the flow rate and compares it with pre-stored safety standards to determine whether it is appropriate, and if it is not appropriate, outputs a shut-off signal and a display signal corresponding to the shut-off reason to operate the shut-off valve 4. The gas circuit is closed and the display 5 is displayed. The control circuit 2 also has a terminal for connecting an external sensor 10 such as a gas leak warning device or a seismic sensor, and receives a signal from the external sensor 10 and outputs a shut-off signal and a shut-off reason display signal. It also constitutes a safety system that operates 4 to close the gas circuit and displays the indicator 5.

In recent years, with the spread of home automation, it has become possible to improve the security effect by linking the safety system with the entrance checker 11' (or in-house remote control). The shutoff valve 4 can be controlled by receiving a signal from the entrance checker 11' (or in-house remote control) at a terminal connected to the external sensor 10 of the control circuit 2'.

The power source of the fluid control device that constitutes the safety system is usually a battery, and the shutoff valve 4 operates only when there is an abnormality in the gas flow rate or when an external sensor is activated, so the number of shutoffs and indications is small under normal usage conditions. The design has been optimized using a battery with a commensurately small capacity.

Problems to be Solved by the Invention However, if the fluid control device 9' is connected to the entrance checker 11' (or in-house remote control) and a shut-off signal is issued from the entrance checker 11' (or in-house remote control) when going out, etc. , the number of shutoffs and indications is significantly increased compared to the fluid control device 9' alone, and battery life is correspondingly shortened.

Means for Solving the Problems In order to solve the above problems, the present invention provides a flow rate monitoring mode setting circuit 7 in the fluid control device 9, as shown in FIG. An input terminal for the monitoring mode setting circuit 7 is provided, and the entrance checker 11
It is configured to receive signals from (or in-home remote control).

Effects With the above configuration, the present invention allows you to remove the card from the entrance checker 11 (or home remote control) when going out (
If you operate the go-out switch on the home remote control, the fluid control device 9 will be set to the flow rate monitoring mode setting circuit 7, and if gas flow occurs for some reason while you are away, the shutoff valve 4 will be activated immediately. Danger can be prevented in advance by activating the display 5 to close the gas circuit and display a warning. Further, it is not necessary to operate the shutoff valve 4 and the indicator 5 every time you go out, and they can be operated only in an emergency, so battery consumption can be kept to a minimum.

Example Embodiments of the present invention will be described below based on the accompanying drawings.

In FIG. 1, 9 is a fluid control device, and 11 is a checker (or home remote control) for controlling the fluid control device. The fluid control device 9 includes a gas meter 1. Control circuit 2. Flow rate detector 3. It consists of a shutoff valve 4° indicator 5. The control circuit 2 has a flow rate measurement function and a judgment reference value for the flow rate and the duration of the flow rate, and when the used flow rate or the continuous use time exceeds the judgment reference value and when there is an input from the external sensor 10. A determination circuit 6 that outputs a cutoff signal and a display signal, a signal reception terminal of the checker 11 (or home remote controller), and a flow monitoring mode setting circuit 7 that is set to a flow standby state by a signal from the checker 11 (or home remote controller). and a signal reception terminal for the external sensor 10.

The checker 11 (or in-home remote control) incorporates an at-home mode switch 12 and a transmitting circuit 13 that transmits an at-home mode signal when the at-home mode switch is turned on. When you remove the inserted card when you leave the house, it turns on and sends out the home-at-home mode signal. If you use a home remote control, switch to the home-at-home mode by operating a circuit switch when you go out.

In the above configuration, when the card of the checker 11 (or in-home remote control) is removed (or the switch is operated to switch to the home-at-home mode), the home-at-home mode switch 12 is turned on, and the transmitting circuit 13 transmits the home-at-home mode signal. The at-home mode signal is input to the flow monitoring mode setting circuit 7 in the control circuit 2 of the fluid control device 9.

The flow rate monitoring mode setting circuit 7 is a NANO gate 1 for the at-home mode signal and the output signal of the judgment circuit 6 when there is a flow rate. In the latter case, a signal indicating that the flow rate is present is sent from the judgment circuit 6 via the inverter 7 to the NAND gate 7'.
When input to , the NANO gate 7' outputs,
It is input to the judgment circuit 6 as a cutoff command. The judgment circuit 6 is
A cutoff signal and a display signal are output, and the cutoff valve 4 is driven and the display 5 is displayed at the same time. When the home-at-home mode is set, it is necessary to set the immediate cutoff mode in the judgment circuit 6 via the inverter 7 in advance.

Effects of the Invention As described above, the fluid control device according to the present invention has (1)
By setting the checker (or in-home remote control) to the home-at-home mode, it has the effect of detecting a trace amount of gas flow and shutting off the gas circuit.

(2) There is no need to operate the shutoff valve every time you go out, and the shutoff valve is activated only when an abnormality occurs, so battery consumption can be saved and the minimum battery capacity required.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the system configuration of a fluid control device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing the system configuration of a conventional example. 1... Gas meter, 2... Control circuit,
3...Flow rate detector, 4...Shutoff valve, 5
...Indicator, 6...Judgment circuit, 7...
...Flow rate monitoring mode setting circuit, 9...Fluid control circuit, 10...External sensor. L
J Ward Castle

Claims (2)

[Claims] (1) A flow rate detector, which measures the flow rate and has a preset flow rate reference value and a duration reference value for each flow rate, and when the flow rate or duration exceeds each of the reference values and an external sensor input is detected. If there is, a control circuit that outputs a fluid cutoff signal and a display signal, a cutoff valve that is activated by the fluid cutoff signal to shut off the fluid, and an indicator that is activated by the display signal and displays the reason for the shutoff. , a fluid control device comprising a power supply section for driving the control circuit, and the control circuit having a flow rate monitoring mode setting circuit. (2) The fluid control device according to claim 1, which is configured together with a transmitting device that transmits a signal for setting the flow rate monitoring mode.