JPH05106758A - Hot-water and water mixing device - Google Patents

Abstract

PURPOSE:To improve the durability of valve discs in respect to a hot-water and water mixing device for adjusting a mixing ratio of hot-water to water. CONSTITUTION:A hot-water and water mixing device is composed of valve openings 32 and 33 for respectively adjusting the flow rates of hot-water and water, valve discs 30 and 31, revolving bodies 30a and 31a for rotating both the valve discs 30 and 31 in the opposite directions, a valve stem 29 for connecting both the valve discs 30 and 31 as one piece., and a variable operating force generating means 25 for operating both the valve discs 30 and 31. The revolving bodies 30a and 31a are revolved by the difference in the flow rate of hot-water and water to rotate the valve stem 29 sometimes to equalize wear of the sliding parts of both the valve discs 30 and 31, and to reduce the amount of wear.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, there is a hot and cold water mixing apparatus of this type as shown in FIG. (For example, JP-A-1-31227
No. 9 gazette) In FIG. 3, 1 is a hot water passage, 2 is a water passage, and an automatic pressure regulating valve 3 is provided in association with each passage.
The automatic pressure regulating valve 3 includes a hot water valve body 4 and its hot water valve seat 5 for reducing the primary pressure PH1 of the hot water flow path 1, and a water side valve body 6 and its hot water valve seat 6 for reducing the primary pressure PC1 of the water flow path 2. Water side valve seat 7
A valve shaft 8 connecting the hot water valve body and the water valve body 6, and a piston 9a provided in the cylinder 9 and operated by the pressure difference between the hot water and the water primary pressures PH1 and PC1. Oru. Then, even if the pressure of the hot water or water suddenly changes, the automatic pressure regulating valve 3 moves by the pressure and acts so that the secondary pressure PH2 of the hot water and the water and the 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 coupled to the end of the valve shaft 8 and the coil 12 wound around the bobbin 11 and insulated. The permanent magnet 13 is provided, and the coil 12 is connected to the control means 18 via the flexible portion 14. When a current is passed 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 according to Fleming's law. For this reason, the automatic pressure adjustment point shifts by the amount of the bias force, and, for example, the secondary pressure PH2 of the hot water and the water and the PC1 are always adjusted at the point of 2: 1, and as a result, the hot water temperature rises. .. In this way, the temperature of the mixed hot water is changed by changing the current to the coil 12. Reference numeral 19 denotes a mixing portion of hot water and water. After mixing, the hot water is discharged through the flow rate control on-off valve 20. Its temperature is detected by the mixed hot water temperature detecting means (for example, thermistor) 15, and its flow rate is detected by the flow rate detecting means 16. The control means 18 urges the bias means 10 and the flow rate control opening / closing valve drive 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 free of rattling and move smoothly. In order to guide the movement of the automatic pressure regulating valve 3, the hot water valve body 4 and the water side valve body 6 The guide vanes 4a and 4b and 6a
And 6b are provided so as to be inclined with respect to the axis, respectively. A water flow collides with the guide vanes to give a turning force to the automatic pressure regulating valve 3 to rotate it, and this rotation changes the contact positions of the valve vanes 5 and 7 of the guide vanes 4a and 6a. The side valve seat 5 and the water side valve seat 7 are evenly worn. Considering that the directions of the hot water and the water flow are opposite to each other, the guide vanes 4a and 6a have opposite vane directions.

[0003]

However, in the above-mentioned structure, the automatic pressure regulating valve 3 is rotated by the total flow rate of the hot water and the water, and always rotates during use.
Therefore, wear due to this rotation continuously occurs, and wear of the guide vanes 4a and 6a and the hot water side valve seat 5 and the water side valve seat 7 significantly progresses, resulting in a problem in durability.

The present invention is intended to solve the above problems and to prevent wear of a valve opening and a valve body and improve durability.

[0005]

In order to solve the above-mentioned problems, a hot and cold water mixing apparatus of the present invention comprises a valve seat and a valve body for adjusting the flow rates of hot water and water, respectively, and both valve bodies are mutually connected by a fluid flow. It is provided with a revolving body that rotates in the opposite direction, a valve shaft that integrally connects both valve bodies, and a variable operating force generation means that operates both valve bodies.

[0006]

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

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 the water flow path 24 side has a variable operating force generating means 25. The variable operating force generating means 25 includes an iron core 26 and a coil 27. 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 the valve shaft 29, and the water shaft 30 and the hot water valve 3 are attached to the valve shaft 29.
1 is fixed and moves integrally with the valve shaft 29. The water valve body 30 and the hot water valve body 31 engage with the water valve opening 32 and the hot water valve opening 33, respectively, and 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 a partition wall 35 fixed to the valve shaft 29 is provided inside the cylinder 34 with a gap. Has been. Three
Reference numeral 6 is a main spring, which exerts its force on the valve shaft 29 in the upward direction in the drawing. Downstream of the water valve body 30 and the hot water valve body 31, variable valve bodies 39, 40 supported by springs 37, 38 are provided.
Therefore, the variable diaphragm is formed. The water and hot water that have passed through the variable valve bodies 39, 40 are mixed in the mixing section 41, the hot water temperature is detected by the temperature detector 42, and the signal is calculated by the hot water supply controller 28. In order to control the mixing of hot water with high accuracy, it is necessary to make the movement of the valve body smooth. Water valve body 30 and hot water valve body 3
In order to guide the axial movement of 1, the water swirl bodies 30a and 3a are provided on the outer circumferences of the water valve body 30 and the hot water valve body 31 as shown in FIG.
0b and a plurality of hot water revolving bodies 31a and 31b, etc., and these revolving bodies 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 opening 32 and the hot water valve opening 33 in the circumferential direction. The valve shaft 29 smoothly moves under the guidance of the swiveling bodies 30a and 31a. This diagonal revolving structure 30
The water flow 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 water flow is in the opposite direction, 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 changes depending 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. To do. As a result, the water side is closed and the hot water side is opened, and the outlet pressures of the hot water valve body 31 and the water valve body 30 respectively change, and the pressures act on the hot water valve body 31 and the water valve body 30 to balance them. As a result, the temperature of the mixed hot water becomes high. When the current of the coil 27 is decreased, the water side is opened and the hot water side is closed, so that the temperature of the mixed hot water becomes low. The mixed hot water temperature 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 hot water is kept constant. At the start of hot water supply, the hot water in the pipe is cooled and the supply temperature of the hot water is low. Therefore, the normal use temperature of 40 ° C. cannot be reached and the hot water is fully opened. At this time, the water flow flows only on the side of the hot water valve body 31 and the valve shaft 29 rotates. After that, when the supply temperature of the hot water rises, the flow rate of the hot water is decreased and the flow rate on the water side is increased, so that the rotation of the valve shaft 29 is stopped. Therefore, the valve shaft 29 rotates only for a short period of time, and stops rotating at the time of steady hot water discharge.

[0009]

As described above, according to the hot and cold water mixing apparatus of the present invention, the following effects can be obtained. (1) A valve opening and a valve body that adjust the flow rates of hot water and water, a revolving body that rotates the two valve bodies in opposite directions by the flow of fluid, a valve shaft that integrally connects the two valve bodies, and both valve bodies Since it is equipped with a variable operating force generating means for operating, the valve shaft is rotated by the water flow to change the position of the sliding part of the valve opening to make the wear uniform, and further reduce the rotation time to reduce the wear due to rotation. It has excellent durability. (2) Since the water valve body and the hot water valve body can be manufactured in the same shape, the molded product can be manufactured by one mold and the cost can be reduced.

[Brief description of drawings]

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

FIG. 2 is a detailed view showing a revolving structure of the hot water mixing device.

FIG. 3 is a sectional view of a conventional hot and cold water mixing device.

[Explanation of symbols]

 25 Variable Operating Force Generating Means 29 Valve Shaft 30 Water Valve Body 30a, 30b Water Swivel Body 31 Hot Water Valve Body 31a, 31b Hot Water Swivel Body 32 Water Valve Port 33 Hot Water Valve Port

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Bunichi Shiba 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A valve opening and a valve body for adjusting the flow rates of hot water and water, a revolving body for rotating the two valve bodies in opposite directions by the flow of a fluid, and a valve shaft for integrally connecting the two valve bodies. A hot and cold water mixing device comprising a variable operating force generating means for operating both valve bodies.