JPH0341270A - Water and hot water mixing device - Google Patents

Abstract

PURPOSE:To prevent fixing of a valve material by balancing the exit pressure of a hot water side valve material and a water side valve material and while controlling the mixing ratio with a variable operating force generating means, and deviating a partitioning material from a bearing with a force generating means at the time of shutdown. CONSTITUTION:A control circuit 18 changes the current to a coil 21 on the basis of the mixed hot water temperature to be detected by a thermistor 15 to move a balance point of an automatic pressure control valve 3 for control. At the time of the hydrauric pressure fluctuation, the automatic pressure control valve 3 is operated to nearly equal the pressurized area of a hot water side valve material 4, a water side valve material 6 and a partitioning material 9, then the secondary pressure PH 2 and PC 2 thereof is maintained under the condition as same as the condition at the balance point by a variable operating force generating means 19 to stabilize the hot water temperature. At the time of shutdown, the electrical feeding to the variable operating force generating means 19 is stopped, and a valve shaft 8 is moved up by a spring 24, and the partitioning material 9 is released from a bearing 25 and moves to the recessed part to eliminate fixing in the peripheral part of the partitioning material 9. The automatic pressure control valve 3 and a temperature control valve can be thus compounded to make a device compact.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing 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 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. The side valve seat 7, the valve shaft 8 that connects the hot water side valve body 4 and the water side valve body 6, and the primary pressure PHI after pressure reduction of hot water and water.
, and a partition body 9 that operates based on the pressure difference between hot water and 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 the hot water and water change. acts so that they are always kept equal. The hot water side valve body 4 and the water side valve body 6 are provided with vanes 4a and 6, respectively, as rotational force generating means.
There are a plurality of blades a, and the automatic pressure regulating valve 3 is rotated by the water flow using these blades to prevent the adhesion of dust and scale. The mixing ratio of hot water and water is varied by moving a temperature control valve 12 energized by a motor 11 having a gear 10 from side to side to change the mixing temperature.

13 is the mixing part of hot water and water, and after mixing, it flows! Hot water is dispensed via the ff1 node on-off valve 14, and its temperature is detected by a thermistor 15 and its flow rate is detected by a flow rate sensor 16.The regulator 18 adjusts the flow rate to the motor 11 in order to match the value of the setting device 17. The regulating on-off valve 14 is energized.

Problems to be Solved by the Invention However, in the above configuration, the automatic pressure regulating valve 3 and the temperature regulating valve 12 are independent, which results in a large size.

The present invention is intended to solve such conventional problems, and its purpose is to obtain a small-sized mixing device that combines the functions of a pressure regulating valve and a temperature regulating valve.

Means for Solving the Problems In order to achieve the above object, the hot water mixing device of the present invention has the following features:
A hot water flow path and a water flow path, a hot water side valve body and a water side valve body that adjust the flow rates of the hot water flow path and the water flow path, a mixing part of the hot water flow path and the water flow path, and a hot water path provided on the valve shaft. a partition body between the water passage and the water passage, a bearing of the partition body, a variable operating force generating means for applying a biasing force to the valve shaft, and a force generating means for causing the partition body to deviate from the bearing when the variable operating force generating means stops operating. It is prepared.

Function With the above-described configuration, while balancing the outlet pressures of the hot water side valve body and the water side valve body, the mixing ratio can be adjusted by the variable operating force generating means. ffL, when the operation of the variable operating force generating means is stopped, the partition body is moved by the force generating means to deviate from the bearing to prevent sticking.

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. 3 are given the same numbers.

There is a variable operating force generating means 19 on the water flow path 2 side, the variable operating force generating means 19 has an iron core 20 and a waterproof and insulated coil 21 around the iron core 20, and the coil 21 is connected to the control circuit 18. ing. 22 and 23 are plugs, and the plug 23 has a force generating means (spring) 24.
is attached to urge the automatic pressure regulating valve 3 upward. By adjusting the current to the coil 21, the magnitude of the force acting on the iron core changes, and the hot water side valve body 4 and the water side valve body 6
, the automatic pressure regulating valve 3 can be moved in balance with the forces acting on each of the springs 24. In order to eliminate the amount of leakage from the water side, the gap between the partition wall body 9 and the bearing 25 is made small. 26 and 27 are orifices, respectively.

Next, the present invention will be explained in detail. When the current is increased from the control circuit 18 to the coil 21, a strong downward force is generated in the iron core 20, urging the valve shaft 8 downward.

As a result, the water side is closed and the hot water side is opened, and the outlet pressures PH2 and PO2 of the hot water side valve body 4 and the water side valve body 6 change, respectively, and the automatic pressure regulating valve 3 is balanced. As a result, the temperature of the mixed water increases. Further, when the current in the coil 21 is reduced, the downward force on the iron core 20 is reduced, and the force of the spring 24 moves the valve shaft 8 upward, opening the water side and closing the hot water side. As a result, the mixed water temperature becomes lower. By changing the current flowing through the coil 21 in this way, the balance point of the automatic pressure regulating valve 3 can be moved. The mixed water temperature is detected by a thermistor 15 and calculated by a control circuit 18 to control the current to the coil 21. When the water pressure fluctuates, the automatic pressure regulating valve 3 operates as in the past, and the hot water side valve body 4, the water side valve body 6 and the partition wall body 9 are operated.
If the pressure receiving area is made almost equal to the secondary pressure PH2
and PO2 are maintained at the balance point by the variable operating force generating means 19, the change in the mixing ratio of hot water and water is small, and the hot water temperature is stable.

When the operation is stopped, the hot water and water are each closed, and furthermore, the power supply to the variable operating force generating means 19 is stopped, and the iron core 20
The electromagnetic force is removed from the valve stem 8 by the spring 24.
moves upward, and as shown in FIG.
5 and moves to the recessed portion, and there is no need to worry about sticking at the outer periphery of the partition wall body 9. In addition to using a spring, it is also possible to use electromagnetic force or the gravity of a valve body as a means for generating deflection.

FIG. 3(a) shows another embodiment of the present invention, in which guides 9a are provided near the partition 9 as shown in the cross-sectional view of FIG. 3(b), and the partition 9 is connected to the bearing 25. The center position of the valve stem 8 is maintained when it is removed from the center. At this time, the tip of the guide 9 comes into contact with the bearing 25, but sticking can be prevented by reducing the contact area.

The control circuit 18 includes a dither circuit 18a and a coil 21.
A minute alternating current signal is superimposed on the drive signal. This dither signal causes the automatic pressure regulating valve 3 to vibrate slightly. This minute vibration is set to a magnitude and frequency that does not cause a change in the mixed water temperature. This dither signal prevents scale and dirt from accumulating during operation.

Effects of the Invention As described above, the hot water mixing device of the present invention has a hot water flow path, a water flow path, a hot water side valve body and a water side valve body that adjust the flow rates of the hot water flow path and the water flow path, and a hot water side valve body. a valve stem that connects the water-side valve body; a partition between a hot water passage and a water passage provided on the valve stem;
The automatic pressure regulating valve and temperature control valve are equipped with a bearing for the partition body, a variable operating force generating means that applies a biasing force to the valve stem, and a force generating means that causes the partition body to deviate from the bearing when the variable operating force generating means stops operating. By combining valves, it can be made smaller and cheaper, and force can be transmitted to the automatic pressure regulating valve without contact, and there is no need for seals on moving parts, making it highly reliable. Furthermore, even if left unused for a long period of time, the valve body will not stick and is highly reliable.

[Brief explanation of drawings]

1 and 2 are respectively sectional views of a hot water mixing device according to an embodiment of the present invention, and FIGS. 3A and 3 B are sectional views of a partition body of a hot water mixing device showing another embodiment of the present invention. FIG. 4 is a sectional view of a conventional hot water mixing device. 1...Hot water flow path, 2...Water flow path, 4...
...Hot water side valve body, 6...Water side valve body, 8...
...Valve stem, 9...Partition body, 19...
Variable operating force generating means, 24...Force generating means, 2
5...Bearing.

Claims (1)

[Claims] A hot water flow path and a water flow path, a hot water side valve body and a water side valve body that adjust the flow rates of the hot water flow path and the water flow path, a mixing part of the hot water flow path and the water flow path, and the hot water side valve body. and a valve shaft that connects the water-side valve body, a partition between the hot water passage and the water passage provided on the valve shaft, a bearing of the partition, and a biasing force applied to the valve shaft. A hot water mixing device comprising: variable operating force generating means; and force generating means for causing the partition body to deviate from the bearing when the operation of the variable operating force generating means is stopped.