JPH07302113A - Valve open/close controller - Google Patents

Abstract

PURPOSE:To provide a valve open/close controller which can immediately specify the abnormality of a valve and can notify it. CONSTITUTION:A valve open/close controller is provided with a gas proportion valve 7 which has its opening degree decided by true conducting current value and is provided on a gas pipe to control the gas flow rate, a valve driving means 8 which drives the open/close actions of the valve 7, and a valve control means 11 which instructs the opening degree of the valve 7 to the means 8. Furthermore a resistance connected in series to the valve 7 is added together with an open/close detector means 9 which detects the information on the current value of the valve 7 based on the voltage applied to the resistance, an abnormality deciding means 12 which compares the opening degree of the valve 7 designated by the means 11 in response to the necessary gas flow rate with the contents detected by the means 9 to decide a normal or abnormal state of the valve 7, and a display means 6 which shows the abnormality that is decided by the means 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing control device, and more particularly to a valve opening / closing control device used for a gas pipe to control the flow rate of gas.

[0002]

2. Description of the Related Art Conventionally, a valve opening / closing control device of this type has been provided in a gas pipe for supplying gas to a combustion part of a gas water heater, and the gas flow rate is adjusted by controlling the opening / closing degree of the valve. There are some that perform appropriate gas combustion.

[0003]

However, although there is such a conventional one, the conventional one has the following problems. For example, if an abnormality such as disconnection occurs in the gas proportional valve, the fire will not come on, but when investigating the cause, there is an abnormality such as a gas proportional valve, an igniter, or a frame rod. It was very difficult to identify the fault location that occurred.

Therefore, an object of the present invention is to provide a valve opening / closing control device which can detect whether or not an abnormality has occurred in the valve itself.

[0005]

In order to achieve the above object, the invention according to claim 1 is directed to a valve, valve driving means for driving the opening and closing of the valve, and instructing the valve driving means to open and close the valve. In a valve opening / closing control device including valve control means, an opening / closing detection means for detecting a state of the valve by detecting a current flowing through the valve, an instruction content of the valve control means and a detection content of the opening / closing detection means. And an indicator for displaying an abnormality when the abnormality is discriminated by the abnormality discriminating means.

According to a second aspect of the present invention, the opening is determined according to the amount of current conducted, and a gas proportional valve provided in the gas pipe for adjusting the flow rate of gas and the opening / closing of the gas proportional valve are driven. In a valve opening / closing control device comprising valve drive means and valve control means for instructing the valve drive means the opening of a gas proportional valve, a resistance connected in series with the gas proportional valve and this resistance Opening / closing detecting means for detecting information on the amount of current flowing through the gas proportional valve based on the voltage, and the opening / closing detecting means for the opening of the gas proportional valve instructed by the valve control means corresponding to the required gas flow rate. It is composed of an abnormality judging means for comparing the contents with a normal state or an abnormal state of the valve, and a display means for displaying an abnormality when the abnormality is judged by the abnormality judging means.

[0007]

When performing the opening / closing operation of the valve, the valve control means outputs a signal according to the opening degree of the valve to the valve drive means. The valve drive means controls the amount of current flowing through the valve based on the signal to open and close the valve. Further, a resistance is connected in series to the valve, the opening / closing detection means detects the amount of current flowing through the valve from the voltage applied to the resistance, and the abnormality determination means causes the valve control means and the detection content of the opening / closing detection means to be detected. And is compared to determine whether the valve is abnormal.

When it is determined that there is an abnormality, an abnormality display is displayed on the display means.

[0009]

EXAMPLES An example of the present invention will be described below.
FIG. 1 shows the configuration of a valve opening / closing control device according to the present invention. In FIG. 1, 1 is a control unit, 2 is a proportional output circuit,
3 is a valve drive circuit, 4 is a voltage amplifier circuit, 5 is a voltage limiter circuit, 6 is a display circuit, and 7 is a proportional valve. The proportional output circuit 2 and the valve drive circuit 3 correspond to the valve drive means 8,
The voltage amplifier circuit 4, the voltage limiter circuit 5, and the resistor R1 correspond to the open / close detection means 9, and the display circuit 6 corresponds to the display means.

The control section 1 has a valve control means 11 and an abnormality detection means 12, and also has an output port 1, an output port 2 and an input port. The valve control means 11 is means for outputting a voltage signal corresponding to the flow rate from the output port 1 to the proportional output circuit based on a flow rate instruction from a controller (not shown). The abnormality determination means 12 is means for comparing the control content output from the output port 1 by the valve control means 11 with the detection content of the open / closed state of the valve input from the input port to determine whether the valve is normal or abnormal. When is detected, a display signal is output from the output port 2 to the display circuit 6.

The proportional output circuit 2 is an amplifier circuit and is a control unit 1.
Amplifies the voltage signal from and outputs the signal to the valve drive circuit 3. The valve drive circuit 3 uses the transistor T based on the input voltage.
The opening of the proportional valve 7 is adjusted by adjusting the amount of current flowing through R1.

A resistor R1 is connected in series to the proportional valve 7, and the voltage amplifier circuit 4 detects and amplifies the voltage applied to the resistor R1. Then, the voltage limiter circuit 5 limits the output of the voltage amplifier circuit 4 so as not to exceed the power supply voltage of the control unit and inputs the output to the input port of the control unit 1.

The display circuit 6 turns on the light emitting LED 8 by a signal from the output port 2 of the control unit 1 to notify the abnormality. When a high signal is output from the output port 2, the transistor TR2 is turned on and the light emitting LED 8 is turned on. To do.

Next, a series of operations performed by the control unit 1 will be described with reference to the flowchart of FIG. First, the valve control means 11 determines whether or not there is a valve control instruction (S).
1) If there is an instruction, a voltage signal corresponding to the instruction of the flow rate is output from the output port 1 (S2). Then, at this time, a detection signal is input from the input port (S3). This detection signal is based on the output signal from the output port 1 for the opening / closing operation of the proportional valve 7 by the valve driving means 8 including the proportional output circuit 2 and the valve driving circuit 3, the resistor R1, the voltage amplifying circuit 4, and the voltage limiter. It is a detection signal of the opening / closing detection means 9 including the circuit 5.

Next, the abnormality determining means 12 is replaced by the valve control means 11
The control instruction is compared with the content of the detection signal input to the input port to determine whether the proportional valve 7 has an abnormality (S4). If normal, step S1
If there is an abnormality (S5), the output from the output port 1 is stopped (S6), a high signal is output from the output port 2 and the LED 8 is turned on to notify the abnormality (S7).

Although the valve driving means 8 is composed of the proportional output circuit 2 and the valve driving circuit 3 in the above embodiment, the proportional output circuit 2 is omitted and the control unit 1 directly sends a signal to the valve driving circuit. May be output.

In the above embodiment, the open / close detecting means 9 is composed of the resistor R1, the voltage amplifying circuit 4 and the voltage limiter circuit 5, but the voltage amplifying circuit 4 and the voltage limiter circuit 5 may be omitted. Information about the amount of current in the proportional valve 7 can be detected. In any case, the open / close detecting means may be any one that detects the open / closed state of the valve 7.

Further, in the above embodiment, the abnormality determining means 12 determines the abnormality of the valve by comparing the instruction content of opening / closing of the valve 7 and the content of the instruction of the opening degree with the detection content of the opening / closing detecting means. It is possible to discriminate only between open and closed, or discriminate up to the opening degree of the valve. When discriminating between the open state and the closed state, a solenoid valve for opening or closing the proportional valve may be used. When determining even the opening, the valve control means 1
The relationship between the control instruction content of No. 1 and the detection content of the opening / closing detection means may be set in advance, and it may be determined whether or not the relationship is within the allowable range.

[0019]

As described above, according to the present invention, it is possible to judge whether or not an abnormality has occurred in the valve itself, and therefore when the abnormality occurs, it is immediately specified that the valve is abnormal. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part 6 Display circuit 7 Proportional valve 8 Valve drive means 9 Open / close detection means 11 Valve control means 12 Abnormality discrimination means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirokazu Ueda 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Noritsu Co., Ltd.

Claims (2)

[Claims] 1. A valve opening / closing control device comprising a valve, valve driving means for driving opening / closing of the valve, and valve control means for instructing the valve driving means to open / close the valve. Opening / closing detecting means for detecting the state of the valve by detecting, and abnormality determining means for comparing the instruction content of the valve control means and the detected content of the opening / closing detection means to determine a normal state or an abnormal state of the valve. A valve opening / closing control device comprising: a display unit that displays an abnormality when the abnormality determination unit determines the abnormality. 2. A gas proportional valve, the opening of which is determined according to the amount of electric current conducted and which is provided in a gas pipe to adjust the flow rate of gas, and valve driving means for driving the opening and closing of the gas proportional valve.
In a valve opening / closing control device comprising valve control means for instructing the valve drive means to open the gas proportional valve, a gas connected based on a resistance connected in series with the gas proportional valve and a voltage applied to the gas resistance valve. The opening / closing detection means for detecting information on the amount of current flowing through the proportional valve is compared with the opening of the gas proportional valve instructed by the valve control means corresponding to the required gas flow rate and the content detected by the opening / closing detection means. An opening / closing control device for a valve, comprising: an abnormality determining means for determining a normal state or an abnormal state of the valve; and a display means for displaying an abnormality when the abnormality is determined by the abnormality determining means.