JPH02271408A - Hot water mixing controller - Google Patents

Abstract

PURPOSE:To suppress hunting and to stabilize the temperature of mixed hot water by providing a mixing valve to control the quantity of flow in a hot water flowing path and water flowing path, driving means to drive this mixing valve, mixed hot water temperature detecting means, means to set the mixed hot water temperature and main control means to switch a driving quantity setting means. CONSTITUTION:A current flows from a control means 18 to a coil 23 and bias force is applied to a valve shaft 8 of a plunger 22 composed of a magnetic substance. When this bias force is balanced with the energizing force of an energizing means 19, an automatic surging valve 3 is balanced. In such a way, the signal of a mixed hot water temperature detecting means 15 and the signal of a setting means 17 are inputted to the control means 18 and the current to be allowed to flow to the coil 23 is controlled so that the temperature of the hot water to be poured can be equal with the set temperature. At such a time, when hunting is generated by any causes and deviation is generated in the hot water temperature of the means 15 and 17 and exceeds a fixed value, a signal is outputted from a temperature difference detecting means 28 and a timer 29 is operated. Then, a time to exceed the deviation is counted by a counting means 30. When this time is much, a driving quantity setting means 27-2 is operated by a main control means 26 and the coil 23 is driven.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water mixing control device that adjusts the mixing ratio of hot water and water to the IA clause and obtains the optimum 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 the figure, 2 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 Pct of the water flow path 2, and a water side valve body 6 that reduces the primary pressure Pct of the water flow path 2. Valve seat 7, hot water side valve body 4, and water side valve body 6
and the primary pressure PH1 after depressurizing the hot water and water.
It is composed of a piston 9 that operates based on the PCI pressure difference, 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 PO2 of hot water and water are always maintained. It works to maintain equality. The mixing ratio of hot water and water is varied by moving the temperature regulating pressure 12 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 adjustment on-off valve 14, and its temperature is determined by means for detecting the combined hot water temperature (for example, a thermistor).
15, and the flow rate is detected by the flow rate detection means 16, and the control means tube 18 controls the flow rate with the motor 11 in order to match the value of the setting means 17! The regulating on-off valve 14 is energized.

Problems to be Solved by the Invention However, in the above configuration, since the temperature control valve 12 is energized by the motor, the response is slow. A hunting phenomenon may occur due to a time delay in the method.

The present invention solves this conventional problem by switching the driving amount of the mixing valve driving means according to the number of times the temperature deviation between the mixing water temperature detecting means and the setting means exceeds a certain value in a certain period of time, preventing the hunting phenomenon and stabilizing the system. The purpose is to supply a mixed hot water temperature.

Means for Solving the Problems In order to solve the above problems, the hot water mixing device of the present invention has a hot water flow path, a water flow path, and a flow rate of the hot water flow path and the water flow path. A mixing valve that performs 4wI, a driving means for driving the mixing valve, a mixing water temperature detecting means for detecting the mixed water temperature, a setting means for setting the mixed water temperature, and a control means for controlling the driving means. , the control means has a plurality of drive amount setting means, and the number of drive amount setting means is determined by the number of times that the temperature deviation between the temperature signal from the mixed hot water temperature detection means and the temperature signal from the setting means exceeds a certain value within a certain period of time. The configuration includes main control means for switching the driving amount setting means.

Operation With the above-described configuration, the driving amount setting means is switched depending on the state of temperature deviation to drive the mixing valve and adjust the temperature.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. In addition, FIG. 1 is a sectional view of the hot water mixing device, and the same parts as in FIG. V 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 driving means that opposes the force of the urging means 19 and applies a variable bias force. The driving means 21 has a plunger 22 made of a magnetic material, and a waterproof and insulated coil 23 around the plunger 22, and the coil 23 is connected to the control means I8. The flow control on-off valve 14 is flow! Adjustment opening/closing valve driving means 24
'aW is detected by the flow rate detection means 16.

FIG. 2 shows an example of the control means 18. 26 is a main control means, 27-1 is a first drive amount setting means, 27-2 is a second drive amount setting means, 27-3 is a third drive amount setting means, 2
7-4 is a fourth drive amount setting means.

28 is a temperature deviation detection means, 29 is a timer means, 30 is a counting means, and 31 is a comparison 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, by changing the current flowing through the coil 23, the balance point of the automatic pressure regulating valve 3 can be moved.

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 from the setting means 17 and the signal from the setting means 17, a current is applied to the coil 23 so that the hot water temperature reaches the set temperature.
PIwl.

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 significantly changed, the mixing valve 20 may become unstable and a hunting phenomenon may occur. (FIG. 3(a)) A means for stopping this hunting phenomenon will be explained below. If hunting occurs for some reason, the temperature deviation detection means 28 outputs a signal when the hot water temperature deviation between the mixed hot water temperature detection means 15 and the setting means 17 exceeds a certain value. (Point a in FIG. 3(b)) In this case, in FIG. 3, the upper limit of the temperature deviation is shown by the limit temperature deviation (+) and the limit temperature deviation (-). The timer means 29 starts operating in response to a signal from the temperature deviation detection means 28. When the timer means 29 starts operating, the counting means 30 also starts counting. The counting means 30 calculates the limit temperature deviation (
+) and the number of times the limit temperature deviation (-) has been exceeded, when the timer means reaches a constant value (FIG. 3 TI) Comparison means 3
1 compares the number of times counted by the counting means. (In this case a
The number of points is 5. ) At this time, if the number of times is greater than the preset value, a signal is sent to the main control means 26 and the main control means 2
6 is the second one that reduces the gain to suppress hunting.
A signal is sent to the drive amount setting means 27-2 (for example, change the drive amount from a to b in FIG. 4) to drive the coil.

When the gain is reduced, hunting disappears and the mixed water temperature becomes equal to the set temperature and becomes stable.

In addition, if hunting is severe for some reason (Fig. 3 (C)), when the timer means reaches a certain value (Fig. 3 TI
) The number of times the counting means has counted is very large (in this case a
The number of points is 9. ) In this case, as in Fig. 3, etc.), even if the gain is slightly changed, the hunting does not subside immediately. output a signal to drive the coil. When the gain is reduced, hunting disappears and the mixed water temperature becomes equal to the set temperature and becomes stable.

For some reason, the mixed water temperature detection means 15 and setting means 17
When the temperature deviation exceeds a certain value and the timer means 29 starts to operate, the number of times the temperature deviation exceeds the limit temperature deviation (+) and the limit temperature deviation (-) is determined. Comparison means 31 compares the value, and if it is less than a certain value, hunting will not occur even if main control means 26 drives the coil using first drive amount setting means 27-1, which is a normal operation.

(FIG. 3(d)) At this time, when the timer means exceeds a certain value, the value counted by the counting means 30 is reset to zero.

Although the number of drive amount setting means is four in the above embodiment, it is also possible to increase the number of drive amount setting means for fine-grained control, or to reduce the number of drive amount setting means for a simpler configuration.

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 are maintained at a 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 controls the hot water flow path, the water flow path, and the flow rates of the hot water flow path and the water flow path. jjlj
! a mixing valve that operates, a driving means for driving the mixing valve, a mixing water temperature detecting means for detecting the mixed water temperature, a setting means for setting the mixed water temperature, and a control means for controlling the driving means. The control means has a plurality of drive amount setting means, and the number of times the temperature deviation between the temperature signal from the mixed hot water temperature detection means and the temperature signal from the setting means exceeds a certain value within a certain period of time Since it is equipped with a main control means for switching the plurality of drive amount setting means, even if hunting occurs, it can be detected, and the plurality of drive amount setting means can switch the drive amount to suppress hunting and supply a stable mixed water temperature. can do.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hot water mixing control device of a hot water mixing control device according to an embodiment of the present invention. 1...Hot water flow path, 2...Water flow path, 4...
...Hot water side valve body, 6...Water side valve body, 8...
... Valve shaft, 18 ... Control means 19 ...
- Biasing means, 20...mixing valve. Agent's name Patent attorney Shigetaka Awano One idiot I -m- 2-m- /9-1- 21-・- Clear water flow path mixed water flow path temperature compensation 4-Pj Condemnation means biasing means mixing valve Canterer R Diagram Diagram

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 driving means that drives the mixing valve, a mixed water temperature detection means that detects the mixed water temperature, and a mixed water temperature detection means. and a control means for controlling the drive means, the control means having a plurality of drive amount setting means, and controlling the temperature signal from the mixed water temperature detection means and the setting within a certain period of time. A hot water mixing control device comprising a main control means for switching the plurality of drive amount setting means according to the number of times a temperature deviation of a temperature signal from the means exceeds a certain value.