JPH0341276A - Water and hot-water mixing control device - Google Patents

Abstract

PURPOSE:To change cycle and an amplitude of the oscillation to converge the oscillation, and supply the stabilized mixed hot-water temperature by switching the driving quantity of a flow quantity control valve driving means with the signal of an oscillation detecting means to change the flow quantity. CONSTITUTION:A control device 18 ordinarily drives a mixing valve driving means 23 so that the mixed hot-water temperature to be detected by a detecting means 15 becomes the target temperature to be set by a setting means 17 to control the opening area ratio of a hot-water flow passage 1 and a water flow passage 2 to be set by a mixing valve 20. At this stage, if oscillation or hunting is generated with some cause, it is detected by an oscillation detecting means 25, and a fluctuation detecting means of the control device 18 detects it as the fluctuation condition with that signal, and when the detected value reaches the previously set value, the control device 18 outputs the signal to a flow quantity control valve driving means 24 to change the flow quantity and converge the oscillation. The stabilized mixed hot-water temperature can be thus supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing control device that adjusts the mixing ratio of hot water and water to obtain an optimal mixed water temperature.

2. Description of the Related Art Conventionally, there has been a hot water mixing device of this type as shown in FIG.

In FIG. 4, 1 is a hot water flow path, 2 is a water flow path, and an automatic pressure regulating valve 3 is provided in association with each flow path. The automatic pressure regulating valve 3 includes a hot water side valve body 4 that reduces the primary pressure PH1 of the hot water flow path 1, a hot water side valve seat 5, a water side valve body 6 that reduces the primary pressure PCI of the water flow path 2, and a water side valve body 4 that reduces the primary pressure PH1 of the hot water flow path 1. Valve seat 7, hot water side valve body 4, and water side valve body 6
and the primary strain PHI after depressurizing the hot water and water.
It is composed of a piston 9 that operates based on the pressure difference of PCI, and even if the pressure of hot water or water suddenly changes, the automatic pressure regulating valve 3 moves with that pressure, and the secondary pressures PH2 and PC2 of hot water and water are adjusted. It works so that it always remains equal. The mixing ratio of hot water and water is varied by moving the temperature control valve I2 energized by the motor 11 from side to side to change the mixing temperature. Reference numeral 13 denotes a mixing section for hot water and water. After mixing, hot water is discharged via a flow rate control valve 14. The temperature of the hot water is determined by a mixed hot water temperature detection means (for example, a thermostat) 15, and the flow rate is determined by a flow rate detection means. 16, and the control means 18 energizes the motor 11 and the 11-section flow rate on-off valve 14 to match the value of the setting means 17.

Problems to be Solved by the Invention However, in the above-described configuration, the automatic pressure regulating valve may vibrate depending on pressure conditions and temperature conditions.

In addition, since the melon control valve 12 is energized by the motor, the response is slow, and a hunting phenomenon may occur due to a time delay in the mixed water temperature detection means that controls the motor only by the signal from the mixed water temperature detection means. .

The present invention solves such conventional problems, and when vibration is detected by the vibration detection means, the drive amount of the flow control valve driving means is switched, and by changing the flow rate, vibration is suppressed and a stable mixed water temperature is supplied. The purpose is to

Means for Solving the Problems In order to solve the above problems, the hot water mixing device of the present invention includes a hot water flow path, a water flow path, a mixing valve that adjusts the flow rates of the hot water flow path and the water flow path, and a mixing valve that adjusts the amount of mixed hot water. a flow rate control valve for adjusting the flow rate, a flow rate control valve driving means for driving the flow rate UA moderating valve, a vibration detection means for detecting vibration, and a drive amount of the flow rate control valve driving means being changed by a signal from the vibration detection means. The configuration includes main control means.

Effects With the above-described configuration, the vibration of the mixing valve is suppressed by changing the flow rate by changing the drive amount of the flow control valve drive means based on the signal from the vibration detection means.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Note that FIG. 1 is a sectional view of the hot water mixing device, and the same parts as in FIG. 4 are given the same numbers.

Reference numeral 19 denotes an urging means, and the automatic pressure regulating valve 3 and the urging means 19 form a mixing valve 20. Reference numeral 21 denotes a mixing valve driving means for applying a variable bias voltage in opposition to the force of the applying means 19.

The mixing valve driving means 21 includes a plunger 22 made of a magnetic material.
A waterproof and insulated coil 23 is provided around the plunger 22, and the coil 23 is connected to the control means 18. The flow rate j11 node on-off valve 14 is driven by the flow rate adjustment on-off valve driving means 24, and the flow rate is determined by the flow rate detection means 1.
Detected at 6. 25 is a vibration detection means.

FIG. 2(a) shows an example of the control means 18. 26 is a main control means, 27 is a pressure fluctuation detection means, 28 is a comparison means, 29 is a first drive amount setting means, and 30 is a second drive amount setting means.

Next, the operation of the configuration of the present invention will be explained.

When a current is applied to the coil 23 from the control means 18, the plunger 22 made of a magnetic material moves toward the valve stem 8 according to Fleming's law.
Give Paisuka to. This pie skirt and biasing means 1
The automatic pressure regulating valve is balanced when the biasing forces 9 are balanced.

Therefore, the balance point of the automatic pressure regulating valve 3 can be moved each time the current flowing through the coil 23 is changed.

For example, when the current is small, the force of the biasing means 19 is stronger, so the water side valve body 6 opens more than the hot water side valve body 4, and the outlet temperature becomes lower.

When the current is increased, the plunger 22 is pushed out against the force of the urging means 19, and the hot water side valve body 4 begins to open, resulting in an increase in the temperature of the tapped water.

In this way, the control means 18 controls the mixed hot water temperature detection means 15.
By inputting the signal and the signal from the setting means 17, the current flowing through the coil 23 is adjusted so that the tapped water temperature becomes the set temperature.

However, if the hot water pressure in the hot water flow path 1 or the water pressure in the water flow path 2 suddenly changes, or if the set temperature is suddenly changed greatly, the mixing valve 20 may become unstable, causing vibration or a hunting phenomenon. Means for suppressing these phenomena will be explained below.

First, a method using pressure detection means (for example, a pressure sensor) as the vibration detection means 25 will be described below.

Normally, the main control means 26 drives the mixing valve driving means 23 with the first driving amount setting means 29 so that there is no temperature deviation between the mixed water temperature detection means 15 and the setting means 17.

If vibration or hunting occurs for some reason, the pressure inside the valve will begin to fluctuate. (Point a in Figure 3) Vibration detection means 2
The signal No. 5 is sent to the pressure fluctuation detection means 2 via the main control means 26.
Sent to 7. The pressure fluctuation detection means 27 detects the pressure fluctuation state (
(absolute value of pressure, period of pressure fluctuation, etc.) is detected and a signal is sent to comparison means 28. The comparison means 28 sends a signal to the main control means 26 when the pressure fluctuation state reaches a preset value, and the main control means 26 sends a signal to the second driving amount setting means 30 to adjust the flow rate to change the flow rate in order to suppress vibration. The flow rate is changed using the valve driving means 24. When the flow rate is changed, the vibration frequency or amplitude is changed, so that the vibration can be converged, and the mixed water temperature becomes equal to the set temperature and becomes stable. (Point in Figure 3) Next, a case where the mixed hot water temperature detection means 15 is used as the vibration detection means 25 will be described. (FIG. 2(b)) Hot water temperature fluctuation detecting means 31 is used in place of the pressure fluctuation detecting means in FIG. 2(a). If vibration or hunting occurs for some reason, the mixed water temperature will fluctuate little by little. The signal from the mixed hot water temperature detection means 15 is sent to the hot water temperature fluctuation detection means 31 via the main control means 26. The hot water temperature fluctuation detection means 31 detects the fluctuation state a of the mixed hot water temperature (such as the absolute value of the mixed hot water temperature or the period of the fluctuation of the hot water temperature) and sends a signal to the comparison means 2 on the second day. Comparison method 2
8 is a second driving amount setting means 30 which sends a signal to the main control means 26 when the mixed water temperature fluctuation state reaches a preset value, and the main control means 26 changes the flow rate to suppress vibrations.
A signal is sent to the flow rate il1l1 and the flow rate is changed using the station valve drive 24. When the flow rate is changed, the vibration frequency or amplitude is changed, so that the vibration can be converged, and the mixed water temperature becomes equal to the set temperature and becomes stable.

Next, a case where the flow rate detection means 16 is used as the vibration detection means 25 will be described. (Figure 2 (C)) Figure 2 (
Flow rate fluctuation detection means 3 instead of the pressure fluctuation detection means in a)
2 is used. If vibration or hunting occurs for some reason, the flow rate will fluctuate little by little.

The signal from the flow rate detection means 16 is sent to the flow rate fluctuation detection means 32 via the main control means 26. The flow rate fluctuation detection means 32 detects the flow rate fluctuation state (period of flow rate fluctuation, etc.) and sends a signal to the comparison means on the second day. The comparison means 28 sends a signal to the main control means 26 when the flow rate fluctuation state reaches a preset value, and the main control means 26 sends a signal to the second drive amount setting means 3° to adjust the flow rate to change the flow rate in order to suppress vibrations. The flow rate is changed using the valve driving means 24. When the flow rate is changed, the vibration frequency or amplitude changes, so that the vibration can be converged, and the mixed water temperature becomes equal to the set temperature and becomes stable.

In normal use, when the water pressure fluctuates, the automatic pressure regulating valve 3 operates as before, and if the pressure-receiving areas of the hot water side valve body 4, water side valve body 6, and piston 9 are made equal, the secondary pressure PH
2 and PO2 maintain the state at the balance point by the biasing means 19 and the driving means 21.

Furthermore, since the pressure regulating valve and the temperature regulating valve can be integrated into one, the size can be made smaller.

Effects of the Invention As described above, the hot water mixing control device of the present invention includes a hot water flow path, a water flow path, a mixing valve that sets the flow rate of the hot water flow path and the water flow path at U1, and a flow rate adjustment that adjusts the amount of mixed hot water. valve and
Said style it! The present invention includes a flow rate adjustment valve drive means for driving the F1 node valve, a vibration detection means for detecting vibration, and a main control device that changes the drive amount of the flow rate adjustment valve drive means based on a signal from the vibration detection means. Even if vibration occurs, it is detected by the vibration detection means, and by changing the flow rate, the period and amplitude of vibration are changed to converge the vibration, and a stable mixed hot water temperature can be supplied.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hot water mixing control device according to an embodiment of the present invention, FIG. 2 a, b, and c are control block diagrams of the same hot water mixing device, and FIG. FIG. 4 is a sectional view of a conventional hot water mixing control device. 1...Hot water flow path, 2...Water flow path, 14.
...Flow rate adjustment on-off valve, 18...Control means, 20...Mixing valve, 25...Flow rate adjustment on-off valve driving means.

Claims (1)

[Claims] A hot water flow path and a water flow path, a mixing valve that adjusts the flow rates of the hot water flow path and the water flow path, a flow rate control valve that adjusts the amount of mixed hot water, and a flow rate control valve driving means that drives the flow rate control valve. A hot water mixing control device, comprising: a vibration detection means for detecting vibration; and a main control means for changing the drive amount of the flow rate regulating valve drive means based on a signal from the vibration detection means.