JP2795012B2 - Gas shut-off device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off device for automatically shutting off a gas passage at the time of an abnormality to prevent an explosion accident or a poisoning accident due to city gas, propane gas, etc. This is related to the confirmation means.

[0002]

2. Description of the Related Art Conventionally, this type of gas shut-off device sends a signal from a flow rate detecting means 3 for detecting a gas flow rate passing through a gas meter 2 provided in a gas passage 1 to a central control unit 4, as shown in FIG. When the input is determined to deviate from the proper use condition, the shut-off means 5 is controlled, the gas passage 1 is closed, and the shut-off reason is displayed in a blinking pattern on the display unit 7 constituted by the LEDs 8. The central control unit 4 receives the reset signal generated when the reset signal generating unit 6 receives a predetermined operation, and returns the operation to the initial state. Here, the proper use conditions are conditions such as the capacity of each gas meter, the flow rate and the continuous use time set according to the gas user's gas equipment and the like.

[0003]

However, in the above-described configuration, in order to confirm the discrimination or the like of a model having the same circuit configuration but different control specifications, a part number label is attached or changed. Unless the operation is confirmed with a setting device or an inspection machine capable of confirming the specification, there is a problem that it is not possible to reliably determine which model is used.

The present invention solves such a conventional problem. A gas shut-off device having the same appearance but different control specifications is not required to check the specifications by a setting device or the like or to attach a product number label. It is another object of the present invention to be able to determine the model and to achieve the above without increasing the cost.

[0005]

In order to solve the above-mentioned problems, a gas shut-off device according to the present invention comprises a flow rate detecting means for detecting a gas flow rate, a shut-off means for closing a gas passage, and a signal from the flow rate detecting means. And a central control unit that controls the shut-off means to close the gas passage when it is determined that the gas flow deviates from the proper use condition, a display unit that displays a shut-off event or an alarm event by a signal from the central control unit, A reset signal generating unit for returning the control unit to an initial state; a device information storage unit for storing a signal pattern assigned to each model; and device information for outputting a signal pattern of the device information storage unit to a display unit in synchronization with the reset signal An output unit is provided.

[0006]

According to the present invention, when the reset operation is performed, the central control unit returns the gas cutoff control to the initial state by the reset signal from the reset signal generating unit, and the device information output unit transmits the device information of the model. Since a signal pattern corresponding to the stored device information storage unit is output, device information can be easily confirmed without a setting device or an inspection device.

Further, since the output destination of the device information output unit is also used as the display unit for displaying the interruption reason or the alarm reason, it is possible to suppress an increase in cost.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 9 denotes a controller of a gas shut-off device connected to a gas meter 2 provided in a gas passage 1. The controller inputs a signal from a flow rate detecting means 3 for detecting a gas flow rate passing through the gas meter 2 to a central control unit 4 and, when it judges that the condition has deviated from an appropriate use condition, controls a shut-off means 5 to control a gas passage 1. Is closed, and the reason for the interruption is displayed in a blinking pattern on the display unit 7 constituted by the LEDs 8. A reset signal generator 6 generates a reset signal when a predetermined operation is received, and inputs a reset signal generated by receiving the predetermined operation to the central control unit 4 to return the operation to an initial state. 1
Reference numeral 0 denotes a device information storage unit that stores a signal pattern assigned to each model. Reference numeral 11 denotes a device information output unit that reads information from the device information storage unit 10 and reads the information as a signal pattern.
Output to Components having the same numbers as those in FIG. 3 are components having the same functions.

In the above configuration, when the reset operation is performed, the central control unit 4 returns to the initial state and starts the control by the reset signal from the reset signal generating unit 6, and at the same time, the signal is input to the device information storage unit 10. . Then, the device information output unit 11 reads and outputs the signal pattern of the device information storage unit 10. In response to this signal pattern output, the LEDs 8 in the display unit 7 emit light in a pattern assigned to each model.

FIG. 2 is a timing chart at the time of receiving a reset operation of the gas interrupting device types A and B. The reset signal from the reset signal generating portion 6 (reset when turned on) and the device information storing portion 10 A signal pattern separately assigned, and a control signal for the display unit 7 of the device information output unit 11 (a is a light-up signal, b is a light-off signal).
When the reset operation is performed in this manner, the LED 8 emits light twice for the model A and three times for the model B, so that the model can be easily identified without a setting device or an inspection device. In addition, since the display unit 7 is also used as the device information output unit, there is no need to add a new display device or the like, which has the effect of suppressing an increase in cost.

In this embodiment, the signal pattern assigned to each model of the device information storage unit 10 is the number of times the LED 8 blinks. However, various types of information can be provided by assigning the lighting time and blinking cycle of the LED 8. Display unit 7
Is constituted by a liquid crystal display (LCD), it is possible to display more specific device information. Further, various information can be notified by assigning information such as a manufacturing lot to device information.

[0013]

As described above, according to the gas shut-off device of the present invention, the following effects can be obtained.

(1) When a reset operation is received, device information is generated in a pattern assigned to each model.
Even if a model with the same appearance but different control specifications appears, there is no need to check the operation with a specific setting device or inspection machine, etc. Can be.

(2) Since the display unit for displaying the reason for interruption or the reason for alarm is also used as a means for informing which model it is, an increase in cost can be suppressed.

(3) Since the device information is output immediately after the reset, the model can be determined in a short time in the inspection at the time of shipment from the factory, and the number of man-hours can be reduced. Also, in the case of using a control device such as a microcomputer, it is possible to reliably confirm a component insertion error in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram of a gas cutoff device according to an embodiment of the present invention.

FIG. 2A is a timing chart when a reset operation of a model A is received in the same device; FIG. 2B is a timing chart when a reset operation of a model B is received in the same device;

FIG. 3 is a block diagram of a conventional gas shut-off device.

[Explanation of symbols]

 Reference Signs List 4 Central control unit 6 Reset signal generation unit 7 Display unit 8 LED 10 Device information storage unit 11 Device information output unit

──────────────────────────────────────────────────の Continuing on the front page (72) Yoshiyoshi Oishi, 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-company (58) Field surveyed (Int.Cl. ⁶ , DB name) G08B 21/00 G01F 15/06

Claims (1)

(57) [Claims] 1. A flow rate detecting means for detecting a gas flow rate, a shut-off means for closing a gas passage, and a signal from the flow rate detecting means for inputting a signal from the flow rate detecting means so as to close the gas passage when it is judged that it deviates from an appropriate use condition. A central control unit that controls the shut-off means, a display unit that displays a shut-down event or an alarm event by a signal from the central control unit, a reset signal generation unit that returns the central control unit to an initial state, and is assigned to each model. And a device information output unit that outputs a signal pattern of the device information storage unit to the display unit in synchronization with the reset signal.