JP2988061B2 - Hot water mixing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water mixing apparatus for controlling the flow rates of hot water and water.

[0002]

2. Description of the Related Art Conventionally, there is a hot water mixing apparatus of this kind as shown in FIG. (For example, see JP-A-1-31227.
No. 9) In FIG. 3, reference numeral 1 denotes a hot water flow path, 2 denotes a water flow path, and an automatic pressure regulating valve 3 is provided in connection with each flow path.
The automatic pressure regulating valve 3 includes a hot water side valve body 4 and a hot side valve seat 5 for reducing the primary pressure PH1 of the hot water flow path 1 and a water side valve body 6 and a low pressure side for reducing the primary pressure PC1 of the water flow path 2. Water side valve seat 7
And a valve shaft 8 connecting the hot water side valve body and the water side valve body 6, and a piston 9a provided in the cylinder 9 and operated by a pressure difference between the primary pressures PH1 and PC1 of hot water and water. Yes. Then, even if the pressure of the hot water or the water changes suddenly, the automatic pressure regulating valve 3 moves at that pressure, and acts so that the secondary pressure PH2 of the hot water and the water and PC1 are always kept equal. Further, a bias means 10 is provided on the valve shaft 8, and the bias means 10 is provided so as to sandwich the bobbin 11 connected to the end of the valve shaft 8, the coil 12 wound on the bobbin 11, and the coil 12. The coil 12 is connected to a control means 18 via a flexible portion 14. When a current flows from the control means 18 to the coil 12, the current crosses the magnetic field generated by the permanent magnet 13, so that a bias force is applied to the valve shaft 8 by Fleming's law. Therefore, the automatic pressure adjustment point is shifted by the amount of the bias force. For example, the secondary pressure PH2 and PC1 of the hot water and the water are always adjusted at a point of 2: 1. As a result, the tapping temperature increases. . Thus, the temperature of the mixed hot water is changed by changing the current to the coil 12. Reference numeral 19 denotes a mixing section of hot water and water. After mixing, the hot water is discharged through a flow rate control opening / closing valve 20. The control means 18 biases the bias means 10 and the flow rate control on / off valve driving means 21 to adjust the temperature so as to match the value of the setting means 17. In order to accurately control the temperature, the automatic pressure regulating valve 3 needs to be smooth and move without rattling. To guide the operation of the automatic pressure regulating valve 3, the hot water side valve element 4 and the water side valve element 6 are required. Have guide vanes 4a, 4b and 6a
And 6b, each of which is obliquely inclined from the axis. A water flow collides with the guide blades to apply a turning force to the automatic pressure regulating valve 3 and rotate the same. The rotation causes the respective contact positions of the valve ports 5 and 7 of the guide blades 4a and 6a to change. The wear of the side valve seat 5 and the water side valve seat 7 becomes uniform. Considering that the directions of the hot water and the water flow are opposite, the guide blades 4a and 6a have the directions of the blades reversed.

[0003]

However, in the above configuration, the automatic pressure regulating valve 3 rotates according to the total flow rate of hot water and water, and always rotates during use.
Therefore, wear due to this rotation continuously occurs, and wear of the guide blades 4a and 6a, the hot water side valve seat 5 and the water side valve seat 7 remarkably progresses, so that there is a problem in durability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and aims to prevent wear of a valve port and a valve body and improve durability.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a hot water mixing apparatus according to the present invention integrally connects a valve port and a valve body for controlling flow rates of hot water and water, respectively, and both valve bodies.
Guides the movement of both valve bodies and both valve bodies and passes through both valve ports
The rotating fluid applies rotational forces to the two valves in different directions.
A revolving body to be generated and variable operating force generating means for operating both valve bodies in the axial direction are provided.

[0006]

With the above arrangement, the valve element rotates only when the flow rate of either hot water or water is high, and the flow rate of hot water and water is adjusted by the variable operating force generating means to adjust the temperature of the mixed hot water. is there.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the mixing valve main body 22 has a hot water flow path 23 and a water flow path 24, and a variable operation force generation means 25 is provided on the water flow path 24 side, and the variable operation force generation means 25 includes an iron core 26 and a coil 27. And the coil 27 is electrically connected to the hot water supply controller 28. The lower end of the iron core 26 is in contact with the upper end of a valve shaft 29, and the valve shaft 29 has a water valve body 30 and a hot water valve body 3.
1 is fixed and moves integrally with the valve shaft 29. The water valve body 30 and the hot water valve body 31 are engaged with the water valve port 32 and the hot water valve port 33, respectively, to adjust the flow rates of hot water and water. The mixing valve body 22 has a cylinder 34 having substantially the same cross-sectional area as the water valve port 32 and the hot water valve port 33, and the cylinder 34 is provided with a gap in which a partition 35 fixed to the valve shaft 29 is provided. Have been. 3
Reference numeral 6 denotes a main spring which acts on the valve shaft 29 in the upward direction in the figure. On the downstream side of the water valve body 30 and the hot water valve body 31, variable valve bodies 39 and 40 supported by springs 37 and 38, respectively.
To form a variable aperture. The water and hot water that have passed through the variable valve bodies 39 and 40 are mixed by a mixing unit 41, the temperature of the hot water is detected by a temperature detector 42, and the signal is calculated by a hot water supply controller 28. In order to accurately control the mixing of hot water and water, it is necessary to smooth the movement of the valve element. Water valve body 30 and hot water valve body 3
As shown in FIG. 2, the water revolving bodies 30 a and 3
0b and a plurality of hot water revolving bodies 31a and 31b are provided. The revolving body 30a and the like are provided obliquely with respect to the axis in order to make wide contact with the inner surfaces of the water valve port 32 and the hot water valve port 33 in the circumferential direction. The valve shaft 29 is smoothly guided by the revolving bodies 30a and 31a. This oblique revolving structure 30
The water stream collides with a and 31b and gives a rotational force to the valve body. Although the revolving units 30a and 31a are inclined in the same direction,
Since the direction of the water flow is opposite, the rotational force is offset. Therefore, the valve shaft 29 rotates when the flow rate of either hot water or water is large, but does not rotate when the difference between the flow rates of hot water and water is small. Since the difference in the flow rate at which the valve shaft 29 starts to rotate depends on the magnitude of the force of the main spring 36 and the magnitude of the friction of the contact portion, it can be adjusted by using a low friction material for the contact portion of the main spring 36. .

Next, the operation will be described. When the current is increased from the hot water supply controller 28 to the coil 27 while the hot water is flowing, a downward force is generated in the iron core 26 and the valve shaft 29 is urged downward against the force of the main spring 36. I do. As a result, the water side is closed and the hot water side is opened, and the outlet pressure of the hot water valve element 31 and the outlet pressure of the water valve element 30 change respectively, and the pressure acts on the hot water valve element 31 and the water valve element 30 to balance them. As a result, the temperature of the mixed hot water increases. On the other hand, when the current of the coil 27 is reduced, the water side is opened and the hot water side is closed. The temperature of the mixed hot water is detected by the temperature detector 42 and calculated by the hot water supply controller 28 to control the current to the coil 27. In this way, the temperature of the mixed water is kept constant. At the start of hot water supply, the hot water in the pipe is cooled and the hot water supply temperature is low, so that the temperature does not reach the normal use temperature of 40 ° C., and the hot water is fully opened. At this time, the water flow flows only to the hot water valve body 31 side, and the valve shaft 29 rotates. Thereafter, when the supply temperature of the hot water increases, the flow rate of the hot water decreases and the flow rate on the water side increases, so that the rotation of the valve shaft 29 stops. Therefore, the valve shaft 29 rotates only for a short time, and stops rotating at the time of steady tapping.

[0009]

As described above, according to the apparatus for mixing hot and cold water of the present invention, the following effects can be obtained. (1) A valve port and a valve body for respectively controlling the flow rates of hot water and water, a valve shaft for integrally connecting the two valve bodies, and movements of the two valve bodies.
Guide valve and fluid passing through both valve ports
A revolving structure that generates torque in directions different from each other
Variable operating force generating means for operating the valve body in the axial direction
Therefore, rotate the valve shaft only when there is a large difference between the amount of hot water and the amount of water.
By changing the position of the sliding part between the revolving unit and the valve port,
And reduces the difference between hot and cold water.
At the time, the valve shaft does not rotate and wear due to rotation of the revolving body is reduced, so that the durability is excellent. (2) Since the water valve body and the hot water valve body can be manufactured in the same shape, a molded product can be manufactured in one mold and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a hot water mixing apparatus according to an embodiment of the present invention.

FIG. 2 is a detailed view showing a rotating body of the hot and cold water mixing apparatus.

FIG. 3 is a cross-sectional view of a conventional hot water mixing apparatus.

[Explanation of symbols]

 25 Variable operating force generating means 29 Valve shaft 30 Water valve body 30a, 30b Water revolving body 31 Hot water valve body 31a, 31b Hot water revolving body 32 Water valve port 33 Hot water port

Continuation of the front page (72) Inventor Bunichi Shiba 1006 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) F16K 31/00-31 / 11 F16K 17/00-17/34

Claims (1)

(57) [Claims] 1. A valve port and a valve body for controlling the flow rates of hot water and water, respectively, and a valve shaft connecting the two valve bodies together,
Guides the movement of both valve bodies and passes through both valve ports
Torques on the two valve elements in different directions
And a variable operating force generating means for operating both of the valve elements in the axial direction .