JPH04208320A - Hot water feeder device - Google Patents

Abstract

PURPOSE:To detect a position of a degree of opening of a flow rate adjusting valve and set freely an amplitude of variation in flow rate or a varying time of flow rate by a method wherein a sensor for detecting a position of a flow rate adjusting valve is installed in a device for driving a flow rate adjusting valve. CONSTITUTION:A control device 16 controls a device 11 for driving a flow rate adjusting valve in response to an input value inputted in advance in reference to a signal got from a setting device 14, drives a flow rate adjusting valve 10 toward its opening side. When a device 15 for sensing a position of the flow rate adjusting valve detects the set value, it drives the flow rate adjusting valve 10 toward its closing side until the sensor 15 for sensing a position of the flow rate adjusting valve detects the set value so as to adjust a degree of opening of the valve and to give an accurate amplitude of flow rate or its period. At this time, the sensor 15 for sensing a position of the flow rate adjusting valve and a flow rate sensor 9 feed back a degree of opening of the flow rate adjusting valve 10 or information of flow rate value to a controller 16. In the case of performing a temperature control, the controller 16 controls the device 6 for driving the mixing valve in response to information of a temperature sensing device 8 after the hot water from the hot water feeding pipe 2 and the cold water from the cold water supplying pipe l are mixed by the mixing valve 5, thereby a degree of opening of the mixing valve 5 is adjusted and the temperature is kept at its indicated value.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a hot water supply device that controls and dispenses hot water.

Conventional technology In recent years, water heaters that change the flow rate of hot water periodically or non-periodically or that fluctuate the flow rate by controlling the amplitude of the flow rate according to a certain function are required for applications such as Noyawar. There is.

Conventionally, this type of water heater generally had a configuration as shown in FIG. The configuration will be explained below.

As shown in the figure, the water supply pipe 1 and the hot water supply pipe 2 are connected to a pressure equalization valve 4 via a check valve 3. The pressure equalization valve 4 absorbs pressure fluctuations in water from the water supply pipe 1 and hot water from the hot water supply pipe 2. The mixing valve 5 mixes hot water and water, and is driven by a mixing valve driving device 6. The mixing valve limit switch 7 detects the fully open and fully closed points of the mixing valve 5. The temperature detector 8 detects the temperature of the mixed hot water, and the flow rate detector 9 detects the flow rate of the mixed hot water. The flow rate control valve lO is used for mixed hot water output, water stop 1, and off.
The flow rate control valve driving device 11 drives the flow rate control valve 10. Flow rate l! The valve control limit switch 12 detects the fully open and fully closed points of the flow rate control valve 10. The controller 13 controls the mixing valve drive device 6 and the flow control valve drive device 11 based on signals from the mixing valve limit switch 7, the temperature sensor 8, the flow rate detector 9, and the flow rate control valve limit switch 12. The settings are manually input using the setting device 14.

Problems to be Solved by the Invention In such conventional water heaters, when changing the hot water flow rate over time, it is possible to detect the fully open and fully closed point of the flow rate control valve 10, but there is no means to detect intermediate positions. It has been difficult to accurately control the flow rate when changing the flow rate periodically or non-periodically or controlling the amplitude according to a certain function.

Furthermore, when attempting to cause flow rate fluctuations using only the information from the flow rate detector 9, flow rate detection errors may occur due to flow rate fluctuations.
Further, there is a problem in that there is a discrepancy between the information when the flow rate is detected and the information when the valve is driven, and the valve opening position is unknown with respect to the flow rate detection information, making it impossible to accurately control the flow rate.

The present invention solves the above-mentioned problems by accurately controlling periodic fluctuations and non-periodic fluctuations along a certain time function of the flow rate that is input in advance to the controller, and by controlling the flow rate fluctuation amplitude and the flow rate fluctuation. The purpose is to freely set the time and obtain accurate flow rate fluctuations.

Means for Solving the Problems In order to achieve the above object, the present invention provides a mixing valve that mixes hot water from a hot water supply pipe and water from a water supply pipe, a mixing valve driving device that drives the mixing valve, and a mixing valve that mixes hot water from a hot water supply pipe with water from a water supply pipe. A temperature sensor that detects the temperature of the mixed hot water, a flow rate detector that detects the flow rate, and flow 11 that performs hot water supply, water stop, hot water supply switching, or flow rate adjustment of the mixed hot water.
a flow control valve, a flow rate control valve driving device for driving the flow rate control valve, a flow rate control valve position detector for detecting the position of the flow rate control valve, the temperature detector, the flow rate detector, and the flow rate control valve position detection. A means for solving the problem is provided with a controller that controls the mixing valve drive device and the flow control valve drive device based on signals from the device, and a setting device that inputs settings to the controller.

Operation The present invention uses the above-mentioned means for solving the problems, and the controller controls the flow rate control valve according to a preset input value based on the output from the flow rate control valve position detector provided in the flow rate control valve, and performs periodic control. Fluctuations and non-periodic fluctuations can be precisely controlled,
Furthermore, the flow amplitude can be changed according to a certain time function.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. Incidentally, those having the same configuration as the conventional example are given the same reference numerals and the explanation thereof will be omitted.

As shown in the figure, the flow rate control valve position detector 15 detects the position of the flow rate control valve 10. The controller 16 controls the mixing valve drive device 6 and the flow control valve drive device 11 based on signals from the mixing valve limit switch 7, the temperature sensor 8, the flow rate detector 9, and the flow rate control valve position detector 15.

Next, the operation of the above configuration will be explained with reference to FIG. 2. When the flow rate amplitude is given periodically or aperiodically, the controller
6, when the output device 15 to which the preliminary input is detected detects the set value, the flow rate regulating valve IO is driven to the closed side until the flow rate adjusting device detector 15 detects the set value to adjust the valve opening degree and accurately Gives appropriate flow amplitude and period. At this time, the flow rate control valve position detector 15 and the flow rate detector 9 feed information on the valve opening degree and flow rate value of the flow rate control valve 10 to the controller 16. In temperature control, the controller 16 controls the mixing valve drive device 6 based on the information from the temperature sensor 8 after the hot water from the water supply pipe 2 and the water from the water supply pipe 1 are mixed by the mixing valve 5. The temperature is maintained at the indicated value by adjusting the opening degree of the valve 5. When the flow rate is fluctuated in this way, information on the valve opening degree of the flow rate control valve 10 can be quickly obtained by the controller 16, and the flow rate control valve driving device 11 can be controlled according to the input value set in the controller 16. I can do it.

As described above, according to the embodiment of the present invention, when the flow amplitude is controlled periodically or aperiodically according to a certain time function, by providing the flow control valve position detector 15, The opening degree of the flow rate control valve 10 can be constantly grasped, making it possible to accurately control the flow rate.

Effects of the Invention As is clear from the above embodiments, according to the present invention, by providing a flow rate control valve position detector in the flow rate control valve drive device, the opening position of the flow rate control valve can be detected, and the controller can detect the opening position of the flow rate control valve. Since it can be confirmed whether the flow rate is always fluctuating in accordance with the pre-programmed flow rate fluctuation function, the following effects can be achieved.

(1) By detecting the opening degree of the flow rate control valve with a flow rate control valve position detector, periodic fluctuations or aperiodic fluctuations along a certain time function of the input flow rate can be detected. Since it can be verified, the flow rate fluctuation amplitude and flow rate fluctuation time can be set freely.

(2) By providing a flow rate control valve position detector in the flow rate control valve driving device, it is possible to detect positional deviations in the opening degree of the flow rate control valve that tend to occur during continuous operation.

(3) By providing the flow rate control valve position detector in the flow rate control valve drive device, the absolute value of the valve position of the flow rate control valve can be accurately grasped, so overrun of the drive system can be prevented.

(4) By providing the flow rate 1iI control valve position detector in the flow rate control valve drive device, the valve opening degree of the flow rate control valve can be grasped at all times, so that reliable flow rate fluctuations can be made.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a water heater according to an embodiment of the present invention, FIG. 2 is an operation flowchart of the water heater, and FIG. 3 is a block diagram of a conventional water heater. l...Water supply pipe, 2...Hot water supply pipe, 5...
...Mixing valve, 6...Mixing valve drive device, 8...
・Temperature detector, 9...Flow rate detector, lO...
...Flow rate control valve, 11...Flow rate control valve drive device, 14
... Setting device, 15 ... Flow control valve position detector, 16 ... Controller. Name of agent: Patent attorney Akira Okaji and 2 others! Water supply amount 2 Water supply efficiency Figure 2

Claims (2)

[Claims] (1) A mixing valve that mixes hot water from a hot water supply pipe and water from a water supply pipe, a mixing valve driving device that drives the mixing valve, a temperature detector that detects the temperature of the mixed water, and a temperature sensor that detects the flow rate. a flow rate detector for dispensing, stopping, switching or adjusting the flow rate of mixed hot water; a flow rate regulating valve driving device for driving the flow regulating valve; and a flow regulating valve for detecting the position of the flow regulating valve. a valve position detector; a controller that controls the mixing valve driving device and the flow regulating valve driving device based on signals from the temperature detector, the flow rate detector, and the flow regulating valve position detector; A water heater equipped with a setting device for inputting settings. (2) The valve opening position and valve opening/closing time of the flow rate control valve are inputted in advance to the controller, and the controller performs control according to the input values according to instructions from the setting device. Water heater.