JPH04165401A - Abnormality detection controller for control valve - Google Patents

Abstract

PURPOSE:To stop feeding hot water and display abnormality of the valve on a display unit unless the value reaches a set opening extent even when driven for a specific time after the opening extent of the valve is set by providing a valve opening extent measuring instrument which measures the opening extent of the valve the specific time after the control valve starts operating. CONSTITUTION:When hot water feeding conditions are inputted from a remote controller 12 to the CPU 11 of a control unit 10, the CPU 11 sets the opening extent of a motor-driven mixing valve 4 and drives the driving motor M for the valve 4. At this time, a timer 16 begins to count up and a potentiometer 15 measures the value of the actual opening extent of the valve 4 the specific time later. If the actually detected value of the opening extent of the valve 4 does not reaches the set value even the specific time later, the CPU 11 judges that the valve 4 is abnormal, closes solenoid valves 5 and 8, and stops a pump 7 to stop feeding the hot water. At the same time, an error code indicating the abnormality of the valve 4 on the display unit 13. Consequently, the abnormality of the valve 4 is confirmed from the display on the display unit 13 and it is speedily repaired.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention detects abnormalities in control valves such as electric mixing valves and proportional valves and controls them in automatic water heaters, etc., according to conditions input by remote control. The present invention relates to an abnormality detection control device for an IJI valve.

(Conventional Technique!#) Conventionally, when using an automatic water heater or the like to supply desired hot water by inputting hot water supply conditions from a remote control unit (hereinafter referred to as a remote control), it was necessary to open a control valve such as an electric mixing valve or a proportional valve. The opening degree is set by a central processing unit (hereinafter referred to as CPLI) according to manual input from a remote controller, and the valve driving motor is driven by a motor driver until the valve reaches the set opening degree by the output from the central processing unit (CPLI).

[Problem B that the invention attempts to solve]

However, in the conventional example, the opening degree of the control valve is controlled as described above, so if the valve drive valve is continued to be driven until the opening degree value of the control valve reaches the set value, the valve itself If the control valve does not work due to a malfunction, the motor driver and Chiyo on the circuit may generate heat and burn out. Also, if hot water is supplied with the control valve not opening properly, hot water, low temperature water, or in extreme cases, water may There were problems such as water overflowing from the cistern due to an imbalance in the water supply or water supply, or the pump running idly when the cistern became empty, creating a risk of wear and tear and causing air to be drawn into the hot water supply pipes.

This invention was made in order to solve the problems of the conventional example as described above. The object of the present invention is to provide a control valve abnormality detection control device that stops the control valve and displays an abnormality indication of the valve on a display.

(Means for Solving the Problems) Therefore, the control valve abnormality detection control device according to the present invention includes a valve opening setting means for setting the valve opening of a control valve operated by remote control, and a valve driving means for driving the control valve; a valve opening measurement means for measuring the opening of the valve after a predetermined time after the control valve starts operating by the valve driving means; and a valve opening measurement means for detecting an abnormality in the control valve and taking abnormality treatment and a display means for displaying an abnormality in the self-control valve,
The abnormality detection control means transmits the abnormality to the display means when the valve opening measurement value of the valve opening measurement means is less than the valve opening setting value set by the valve opening setting means, and Some attempt to achieve their own objectives by cutting off the supply of.

[Effect]

The abnormality detection control device for a control valve according to the present invention having the above-described structure detects that the valve opening setting value set by the valve opening setting means of the control valve is reached after a predetermined period of time has elapsed after the start of driving of the control valve. If the actual control valve opening value measured by the valve opening measurement means does not reach the actual value of the opening of the control valve, the abnormality detection control means stops the fluid supply, and the display means indicates whether there is an abnormality in the valve. Is displayed.

(Example) An example of the present invention will be described below based on the drawings.

(Configuration) Fig. 1 is a configuration diagram of an electric hot water automatic hot water supply system showing an embodiment of the present invention, Fig. 2 is a block diagram of valve opening control of the electric mixing valve during automatic hot water supply of the above embodiment, and Fig. 3 is a Similarly, FIG. 4 is a plan view of the remote control unit of the above embodiment, and is a flow chart of the valve opening control operation of the electric mixing valve of the above embodiment.

In Figures 1 to 3, 1 is an abnormality detection control device for a control valve of an automatic electric water heater, 2 is an electric water heater, 3 is a bathtub, 4 is an electric mixing valve which is a control valve V, and 5.8 is an electric mixing valve. solenoid valve,
6 is a gas turbine, 7 is a pump for hot water supply, 10 is a control unit, 11° 17 is a CPU consisting of a one-chip microcomputer, etc., and 12 is a computer that controls automatic hot water supply conditions.
A remote control unit (hereinafter referred to as a remote control) inputs to the PU 11, 13 a display disposed on the remote control, 14 a motor driver that controls the drive of the motor M of the electric mixing valve 4, and 15 a valve of the electric mixing valve 4. A potentiometer 16 for measuring the opening is a timer built into the CPU II and counting a predetermined time. The valve driving means B with the driving motor M,
The valve opening measuring means C is composed of the CPU II, the potentiometer 15 and the timer 16, and the solenoid valve 5°8, the pump 7 and the CPU
l1. Remote control unit 12. The potentiometer 15 and the timer 16 constitute an abnormality detection control means, and the CPU 17 and the display 13 constitute a display means E.

(motion) The operation will be explained based on the above configuration.

2 and 4, when hot water supply conditions are input from the remote controller 12 to the CPUI 1 of the control unit 10 in step S1 (steps are omitted below), the CPUI 1 is inputted in S2.
I sets the opening degree of the electric mixing valve (hereinafter referred to as valve) 4;
In response to the hot water supply command from the remote controller 12 in S3, valve 4 is activated in S4.
The drive motor M is driven. At this time, timer 1 in S5
6 starts counting, and when a predetermined period of time has elapsed, the actual opening degree of the valve 4 is measured by the potentiometer 15 in S6, and the CPU II determines whether the opening degree of the valve set in S7 has been reached. If the set value has been reached, hot water supply continues in S8, and the CPU II
When an instruction is given to change the opening degree of valve 4, the process returns to 84 and the opening degree of valve 4 is changed.
is driven again and then the motion of J is returned. After a predetermined amount of hot water is supplied at step 310, the hot water supply ends at step Sll. S7
Actual valve 4 detected by potentiometer 15
If the set value is not reached even after a predetermined period of time has elapsed, the CPU II determines that there is an abnormality in the valve 4, closes the solenoid valves 5 and 8 in step S12, and stops the pump 7. At the same time as the water supply is stopped, an error code indicating an abnormality in the valve 4 is not displayed on the display 3 disposed on the remote controller 12 at step S13 to warn the user of the abnormality in the valve 4. The stiffness prevents overheating of the driver 14 and motor M due to failure of the valve 4, and prevents wear and tear and air entrainment due to idle running of the pump 7.The error code is displayed on the display 13. It was confirmed that there was an abnormality in Jf4, and repairs were to be carried out at J speed.

Next, another embodiment of the present invention will be described with reference to the configuration diagram of an automatic electric hot water supply system shown in FIG. 5 and the valve opening degree control block diagram of a proportional control valve shown in FIG.

It should be noted that circuits or equivalent parts as in the above-mentioned embodiments are denoted by the same reference numerals.

5 and 6, IA is a control valve abnormality detection control device, 9 is a proportional valve which is a control valve (■), 18 is a motor driver, 19 is a potentiometer, 20 is a timer, M,
is the drive motor.

In this embodiment, instead of the electric mixing valve 4, the opening of the proportional valve 9 is controlled by a valve opening measuring means C and a control valve abnormality detection control means. Since this is the same as the abnormality detection control of the mixing valve 4, detailed explanation will be omitted.

In the case of this embodiment, even if a predetermined period of time has elapsed since the valve opening of the proportional valve 9 started to be driven, the actual opening of the proportional valve 9 measured by the valve opening measuring means C is The degree value is CPUI
If the valve opening degree set in I is not reached, the solenoid valve 5.8 is closed as in the previous embodiment, the pump 7 is stopped, and at the same time the indicator 13 disposed on the controller 12 is An error code indicating an abnormality in the proportional valve 9 is displayed.

Stiffness prevents overheating of the proportional valve 9 (-tatriver 18 and motor M), prevents the supply of hot water or low-temperature water, overflow of hot water from the distiller 6, and air entrainment into the hot water supply piping due to idle running of the pump 7. Not only can this prevent the wear and tear of the pump 7, but also the error code 1 on the display 13 can be prevented.
- An abnormality in the proportional valve 9 can be confirmed by the display, and repairs can be carried out quickly.

Note that this invention is not limited to electric hot water automatic water heaters, and can be used not only for hot water storage type automatic water heaters but also for valve opening of control valves when the supply of various liquids is automatically controlled by electric control valves. Of course, the present invention can be applied to all kinds of degree control.

Furthermore, a configuration in which the valve opening setting value is set stepwise with respect to the final valve opening setting value by one stage of valve opening setting is also included in the technical scope of the present invention.

〔Effect of the invention〕

As explained above, according to the present invention, the drive of the control valve is started and a predetermined time has elapsed with respect to the valve opening setting value set by the valve opening setting means of the control valve operated by remote control. If the actual valve opening value measured by the valve opening measuring means after the proper adjustment is less than the set value, the abnormality detection control means stops the fluid supply, and the display means shows the control valve on the display. Since the configuration is configured to display abnormalities, it prevents overheating of the motor driver and motor for driving the valve due to abnormal valve opening of the control valve, and prevents wear and tear due to constant supply of fluid and dry running of the pump. In addition to preventing air from getting into the piping, the system immediately alerts the user to the location of the control valve where the abnormality has occurred by displaying a control valve abnormality indication on the display, allowing quick and accurate repairs. This can greatly improve maintainability.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an electric hot water automatic hot water supply system showing an embodiment of the present invention, Fig. 2 is a block diagram of the valve opening control of the electric mixing valve during automatic hot water supply in the above embodiment, and Fig. 3 is a diagram showing the same implementation as described above. A plan view of the remote control unit of the example, FIG. 4 is a flowchart of the valve opening control operation of the electric mixing valve of the above embodiment, and FIG. 5 is a configuration diagram of an electric hot water automatic hot water supply system showing another embodiment of the present invention. FIG. 6 is a block diagram of the valve opening degree control of the proportional valve according to another embodiment. 1. IA-1 control valve abnormality detection control device, 2...
Electric water heater, 4--Electric mixing valve, 5.8--Solenoid valve, 9--Proportional valve, 10--Control unit, 11.1
7------CPU, 12---Remote control unit, 13---Display, 14.18...-
・Motor driver, 15.19---Potentiometer, 16.20~---Timer, A---Valve opening setting means, B---Valve drive means, C------ Valve opening measurement means, D-... Abnormality detection control means, E.
. . . Display means, M, M, --- Single valve drive motor In the drawings, the same or corresponding parts are represented by the same symbols.

Claims (1)

[Claims] a valve opening setting means for setting the valve opening of a control valve operated by remote control; a valve driving means for driving the control valve; a valve opening degree measuring means for measuring the opening degree of the control valve; an abnormality detection control means for detecting an abnormality of the control valve and taking measures for the abnormality;
and display means for displaying an abnormality in the control valve, and the abnormality detection control means detects when the valve opening measurement value of the valve opening measurement means is less than the valve opening setting value set by the valve opening setting means. An abnormality detection control device for a control valve, characterized in that when the abnormality is detected, the abnormality is transmitted to the display means and the supply of fluid is stopped.