JP3074826B2 - Control 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 control device such as a gas shutoff device used for a gas supply passage.

[0002]

2. Description of the Related Art In recent years, for the purpose of safe use of city gas or LP gas, a gas meter as a detecting means for measuring the amount of fuel gas (hereinafter referred to as gas) has been used for an abnormally long time use or abnormal use of gas. A gas meter with a shutoff device to which a device for shutting off a gas passage when a flow rate is detected is becoming widespread.

In a gas shut-off device as this type of control device, a controller as a control circuit processes a detection signal of the gas flow by a microcomputer to monitor the gas flow, and outputs a shut-off signal if there is an abnormality to control the gas flow. Close the shut-off valve as a means. The controller was equipped with a long-term reliable power supply battery such as a lithium battery, and supplied the circuit current and the drive current of the shut-off valve. This power supply battery had the characteristic that it did not need to be replaced during the set use period of the device, and was soldered and fixed to the circuit board of the controller like other electronic circuit components such as microcomputers, and the controller was rationally designed. . Then, in a process of assembling the apparatus, the apparatus is assembled with a gas shutoff valve or the like, and the microcomputer is supplied with a current of a power supply battery so as to drive the gas shutoff valve.

[0004]

However, in the conventional configuration, a malfunction occurs, the power supply battery is consumed, and the service period is shortened between the time when the controller is completed as a part and the time when the controller is incorporated into the gas shut-off valve device. Performance problems. For example, if the controller receives static electricity when handling the controller, the microcomputer that misjudged the noise due to the static electricity as an input signal latches the controller in an abnormal state, and the current for this latch resets the gas shutoff valve when assembly is completed. It flowed unnecessarily until I did it. For this reason, the controller must be carefully handled with respect to external noise such as static electricity and work efficiency is reduced, and the above-mentioned reset work is a predetermined work at the time of assembling the apparatus. But improvement was requested.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a control device which facilitates handling of a control circuit in an assembling process and maintains a rational design capable of rationalizing an assembling operation of the device. And

[0006]

In order to achieve the above object, a control device according to the present invention comprises a control unit, a detection unit for detecting a control amount of the control unit, a battery for power supply and a microcomputer. The control circuit is provided with a control circuit soldered and fixed to the substrate, a disconnection means for a power supply circuit of the microcomputer, and a connection means for electrically connecting the control means, the detection means and the cutoff means to the control circuit.

[0007]

According to the above-mentioned means, the control device according to the present invention is arranged such that when the power supply battery and the microcomputer are soldered and fixed to the circuit board and the control circuit is completed as a part, the microcomputer is connected to the power supply battery by the shut-off means. The circuit has been interrupted. In the connection means, one connector is connected in advance to the control means, the detection means and the cutoff means, and the other connector is also connected in advance to the control circuit. The two connectors are connected when the device is completely assembled, and the microcomputer can drive the control means.

Thus, the power supply circuit of the microcomputer is not electrically connected until the assembly of the device is completed, and when the control circuit is handled as a single component, it does not malfunction due to extraneous noise. The work can be eliminated, and even if the interruption means is added, the electric connection is automatically performed at the time of the electric connection of the control means and the detection means, so that the assembling work of the apparatus can be rationalized and a rational design can be maintained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the control device of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 shows a gas shut-off valve device as one embodiment of the present invention. A gas shut-off valve 1 as a control means is provided in a gas passage 2 and is driven and controlled by a controller 3 as a control circuit. The gas passage 2 is provided with a flow rate detecting means 4 for detecting a gas flow rate in an airtight manner.

The gas shutoff valve 1 is provided with a valve seat 9 provided in the gas passage 2.
, A spring 11 for pressing the valve 10 against the valve seat 9, an electromagnetic coil 12 for generating a magnetic field by a shut-off signal output from the controller 3, A plunger 13 to which the valve portion 10 is fixed and a permanent magnet portion 14 having a magnetic force for attracting the plunger 13 are provided.

The plunger 13 is used when the gas use condition is normal.
The valve unit 10 is attracted and held by the permanent magnet unit 14, opens the gas passage 2 apart from the valve seat 9, and allows the gas to flow. When a cutoff signal is applied to the electromagnetic coil 12, a current I flows, and the current I excites the electromagnetic coil 12 and generates a magnetic force in a direction opposite to the magnetic force of the permanent magnet unit 14. And plunger 13
When the attraction force between the spring and the permanent magnet portion 14 is weakened and the urging force of the spring 11 is superior, the plunger 13 moves upward, the valve portion 10 comes into contact with the valve seat 9, and the gas passage 2 is shut off.

The controller 3 is a microcomputer 3
1. A power supply battery 32, a driving transistor 33 and the like are fixed to the circuit board 3a by soldering. The microcomputer 31 receives the signal of the flow rate pulse from the flow rate detecting means 4, and determines the gas use state based on the gas use state based on this signal and a predetermined judgment criterion stored in advance. When the gas use state is abnormal, the drive transistor 33 is operated, and the current I from the battery 32 is output as a cutoff signal through the drive transistor 33.

The controller 3 and the gas shut-off valve 1 are connected by a connector 5 as a connection means. The connector 5 comprises a pair of a connector 5a fixed to the controller 3 and a connector 5b connected to the gas shut-off valve 1. The connector 5b is also provided with a short-circuit lead 5c as a breaking means, and the current I from the battery 32 is supplied through the short-circuit lead 5c when the connector 5b is inserted into the connector 5a. The short lead wire 5c is the microcomputer 3
It also serves as a supply path (power supply circuit) 3b for the power supply current I _M to 1. When the connector 5b is not connected, the current _IM is not supplied to the microcomputer 31.
The microcomputer 31 has stopped functioning. The controller 3 and the flow detecting means 4 are also provided with a pair of connectors 6a, 6
b. In this embodiment, the connector 5 between the controller 3 and the shut-off valve 1 is provided with the short lead 5c. However, the same function can be obtained by providing the connector 6 between the controller 3 and the flow detecting means 4 with the short lead. Have. Further, the connector 5 and the connector 6 may be an integrated connector. The interrupting means is not limited to the lead wire but may be a component of a power supply circuit. The interrupting means may not necessarily be provided in the connectors 5 and 6 but may be provided in the supply path 3b of the circuit board 3a. However, the above embodiment is superior in reducing the number of assembling steps of the apparatus.

As described above, the gas shut-off valve device according to the present embodiment incorporates the controller 3, the gas shut-off valve 1, the flow rate detecting means 4 and the like into the device, and performs the mutual connection by the connectors 5 and 6 in the final stage. Since power is supplied to the controller 3, the microcomputer 31 does not malfunction during the assembling process after the previous controller 3 is manufactured as a single component, and unnecessary consumption of the battery 32 can be avoided.
Moreover, handling of the controller 3 is facilitated. In addition, since the microcomputer 31 is energized in the interconnection work at the time of assembling the apparatus, the operation of resetting the controller 3 which is conventionally a predetermined operation at the time of energization can be eliminated.
Furthermore, even if the above effects are obtained, the short lead wire 5
The connection work of c does not increase, and the conventional rational design can be maintained.

The present invention is not limited to the above-described embodiment, and may be connected to a water supply pipe to detect a flow rate (control amount) or a hot water supply pipe (control amount) to detect abnormal control. It can also be used for a control device or the like that stops supply when the amount is large.

[0016]

As is apparent from the above description, according to the first aspect of the control device of the present invention, it is easy to handle the control circuit after the manufacturing process and during the assembly process into the device, and it is not necessary to use a power supply battery. A reasonable design can be maintained while preventing excessive wear.
According to the second aspect, in addition to the above effects, it is expected that the assembling work of the apparatus can be further rationalized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a control device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas cutoff valve (control means) 3 Controller (control circuit) 4 Flow rate detection means 5 Connector (connection means) 5c Short lead wire (cutoff means) 31 Microcomputer 32 Battery

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02J 1/00-1/16 H02J 7/00-7/12 H02J 7/34-7/36 G01F 3 / 22 G06F 1/32

Claims (2)

(57) [Claims] 1. A control means, a detecting means for detecting a control amount of the control means and outputting a detection signal, a microcomputer for receiving the detection signal, a power supply battery, and a circuit comprising the microcomputer and the power supply battery A control circuit for driving the control means by soldering and fixing to the substrate; and a cutoff means for a power supply circuit of the microcomputer, wherein when the control means is electrically connected to be drivable, the power supply circuit is conducted by the cutoff means. Control device. 2. When the control means and the detection means are electrically connected to the control circuit, the cutoff means of the power supply circuit is automatically electrically connected to make the microcomputer and the power supply battery conductive, and a connection comprising a pair of connectors. 2. The control device according to claim 1, further comprising means.