JPH049507Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a thermostatic mixing valve.

(Prior Art) Various structures of thermostatic mixing valves have been known in the past, and a typical one is the one shown in FIG. 4, disclosed in Japanese Utility Model Application No. 57-46163.

To explain the one in FIG. 4, the control valve a has a control valve body 4 between a hot water valve seat 6 and a water valve seat 7, and this control valve body 4 includes an element case 12, a temperature sensing part 5, and an element presser. 13. It is connected to a spindle 15 via a safety spring 14, and when only water is to be discharged, the control valve body 4 is pressed against the hot water valve seat 6 to close the hot water.

All of its functional parts are housed in a liner 16 and installed in a main body 17 having a hot water flow path 1, a water flow path 2, and a mixed water flow path 3, and the hot water valve seat 6
is screwed and fixed to the liner 16.

However, due to manufacturing or assembly errors,
The control valve body and the hot water valve seat may face each other without being completely parallel, and if the control valve body is pressed against the hot water valve seat in this state, the control valve body will hit the hot water valve seat partially and hot water will leak. The water heater catches fire and wastes energy.

(Problem to be solved by the invention) The problem to be solved by the invention is that when the control valve body is seated on the hot water valve seat, the hot water valve seat is free to move so that the hot water valve seat can imitate the control valve body. The purpose is to maintain the temperature of the mixed water without impairing the stability of the temperature of the mixed water.

(Means for Solving the Problems) The technical means taken by the present invention to achieve the above problems are a hot water flow path, a water flow path, a mixing water flow path that communicates with both of these ports via a control valve, and a control valve. The control valve is connected to the hot water valve seat, the water valve seat, and the water valve seat. In a thermostatic mixing valve composed of a cylindrical control valve body disposed between both valve seats, the hot water valve seat is formed on the opening side end surface of a bottomed cylindrical hot water valve seat body having a guide surface on the outer peripheral surface. The bottom side of the hot water valve seat body is fitted into a guide member having a guide hole whose inner diameter is larger than the outer diameter of the guide surface, and the guide surface of the hot water valve seat body is guided by the inner peripheral surface of the guide hole of the guide member. At the same time, a protrusion is provided at the center of the bottom surface of the hot water valve seat body or the inner bottom surface of the guide hole, so that the hot water valve seat body can swing freely in the guide hole using this projection as a fulcrum, and at the bottom of the hot water valve seat body. The hole is bored to allow communication between the space between the guide member and the hot water valve seat body and the inside of the hot water valve seat body.

(Operation) According to the above technical means of the present invention, if the hot water valve seat surface and the control valve body are not completely parallel, the control valve body will be pressed against the hot water valve seat surface. Due to the pressing force, the hot water valve seat body swings within the guide member using the protrusion as a fulcrum, and the hot water valve seat surface follows the control valve body and is corrected to be parallel to the control valve body, so that the two are in complete contact with each other. .

At this time, due to the rocking of the hot water valve seat body, the water between the guide hole and the hot water valve seat body escapes to the inside of the hot water valve seat body through the hole at the bottom of the hot water valve seat body, and the volume changes. , does not obstruct the movement of the hot water valve seat body. In addition, the above hole allows water to freely flow in and out of the space between the guide hole and the hot water valve seat body and into the hot water valve seat body, so the heat of the hot water flowing through the hot water flow path causes the guide hole and the hot water valve seat body to flow freely. This prevents the water in between from thermally expanding and pushing the hot water valve seat body toward the hot water valve body.

(Example) Hereinafter, an example of implementation of the present invention will be described based on the drawings.

In the figure, 17 is the main body, 1, 2, and 3 are partition walls 1, respectively.
A hot water flow path, a water flow path, and a mixed water flow path are defined inside the main body 17 via 8, and in this embodiment, hot water flow path 1 and water flow path 2 are provided with a hot water on-off valve b and a water on-off valve c, respectively.
The mixed water flow path 3 is provided with a bath/shower switching valve d, and the mixed water flow path 3 is connected to a bath spout 19 through the bath/shower switching valve d.
I am contacting Shower 20.

The mixed water flow path 3 is formed in the front half of the main body 17,
The hot water flow path 1 and the water flow path 2 are provided in the front half of the main body 17 so that the water flow path 2 is adjacent to the mixed water flow path 3, and the hot water flow path 1 is adjacent to the water flow path 2 in the horizontal direction, and continues to the rear half of the main body 17. The main body 17 is formed as follows.
Connection sockets 21 for hot water and water on the back,
22 is connected.

The hot water flow path 1 and the water flow path 2 are formed vertically adjacent to each other at the center in the left-right direction of the rear half of the main body 17 with the water flow path 2 facing upward, and the hot water on-off valve b and the water on-off valve c are The hot water on-off valve body 23 and the water on-off valve body 24 are provided on a single spindle 25 that is inserted into the hot water flow path 1 and the water flow path 2 from above the main body 17 so as to be freely retractable. and an opening/closing handle 2 attached to the outer end of the spindle 25.
The hot water opening/closing valve seat 27 provided in the hot water flow path 1 and the water flow path 2 is moved by the movement of the spindle 25 along with the rotation operation of the hot water flow path 1 and the water flow path 2.
It comes into contact with and separates from the water opening/closing valve seat 28 to open and close together.

On the other hand, the mixed water flow path 3 is provided with a control valve liner mounting port 29 on the side surface of the front half of the main body 17, and the hot water flow path 1 is provided with a control valve liner mounting port 29 in a portion formed in the front half of the main body 17. An opening 30 concentric with the mouth 29 is provided on the side of the main body 17.

The control valve liner 16 is attached to the control valve liner attachment port 29, and the guide member 11 that constitutes the hot water valve seat 6 of the control valve a together with the hot water valve seat main body 9, which will be described later, is screwed into the opening 30. do.

The guide member 11 is screwed into the opening 30 and is formed by recessing a guide hole 10 having a slightly larger diameter than the outer diameter of the hot water valve seat body 9 on the inner surface side of the lid that closes the opening 30.
When screwed into the opening 30, its inner end extends into the hot water flow path 1.

The hot water valve seat main body 9 is formed into a roughly cylindrical shape with a bottom, and has a hot water valve seat surface 8 formed on its open end surface, and a hole 3 on the bottom at its center and at an appropriately offset location.
1 and 32 are drilled, and a protrusion 33 is provided on the outer opening edge of the hole 31 in the center that projects along the edge.

In addition, the hot water valve seat body 9 has a spring engaging stepped portion 34 at the inner bottom.
In addition, a stepped portion 3 is provided on the outer circumferential surface in the axial direction.
5 to form a large-diameter guide surface 36 on the open side with respect to the bottom side, and this large-diameter guide surface 36 fits an O-ring 38.

The hot water valve seat main body 9 is fitted into the guide hole 10 of the guide member 11 with the hot water valve seat surface 8 facing into the hot water flow path 1, and the O-ring 38 is tightly connected to the inner peripheral surface of the guide hole 10.

A step 37 corresponding to the step 35 on the outer periphery of the hot water valve seat main body 9 is formed in the guide hole 10, and the guide surface 36 of the hot water valve seat main body 9 is fitted into the guide hole 10 to form a protrusion on the bottom. 33 is in contact with the inner bottom surface of the guide hole 10, both the stepped portions 35, 37
are opposed to each other with a slight gap between them.

Therefore, when a force is applied to the hot water valve seat surface 8 and the direction in which the force is applied is not parallel to the axis of the hot water valve seat body 9, the hot water valve seat main body 9 will apply the force using the protrusion 33 as a fulcrum. can be swung in the direction in which it is applied.

Further, the space formed between the inner circumferential surface of the guide hole 10 of the guide member 11 and the outer circumferential surface of the hot water valve seat main body 9 is in communication with the inside of the hot water valve seat main body 9 via the hole 32.

Note that the hole 31 provided at the center of the projection 33 of the hot water valve seat body 9 is provided to facilitate processing of the end face of the projection 33, but for example, in a cold region, the guide member 11
A drain plug is provided in the main body 17 using this hole 31.
It can also help drain water inside.

Note that, instead of the protrusion on the hot water valve seat body 9, a protrusion may be provided on the bottom surface of the guide member 11.

The control valve liner 16 has a front member 16a and a rear member 1 that are each formed into a cylindrical shape and are screwed together.
6b, and the control valve liner mounting port 29
The front member 16a is inserted and screwed into the mixed water flow path 3 from the front member 16a.
partition wall 1 that partitions the water flow path 2 and the mixed water flow path 3
8 is inserted and extends into the water flow path 2, and its tip constitutes the water valve seat 7.

Further, the control valve liner 16 has a through hole 39 on the rear peripheral surface of the front member 16a, and through the through hole 39,
The inside of the liner 16 communicates with the mixed water channel 3.

Reference numeral 4 denotes a control valve body that constitutes the control valve a corresponding to the hot water control valve seat 6 and the water control valve seat 7, and is formed in a cylindrical shape and partitioned in the diametrical direction at a midway point in the axial direction. It is equipped with a partition plate 40, which is disposed between the hot water and water valve seats 6 and 7 by penetrating the partition wall 18 that partitions the hot water flow path 1 and the water flow path 2 so as to freely slide. They correspond to valve seats 6 and 7, respectively.

Further, the control valve body 4 has a hot water passage hole 41 formed in the partition plate 40 that passes through the partition plate 40 in the thickness direction, and also extends between the partition plate 41 and the spring engaging stepped portion 34 of the hot water valve seat body 9. A spring 42 is loaded to urge the control valve body 4 toward the water valve seat 7 side.

Reference numeral 12 denotes an element case, which is formed into a cylindrical shape with openings at the front and back, and has a water passage hole 4 on the front end circumferential surface.
3. Drilling holes 44 for mixed water on the rear circumferential surface,
It is slidably disposed within the front member 16a of the control valve liner 16, and its front end abuts against the partition plate 40 of the control valve body 4.

The temperature sensing section 5 is provided in the element case 12 mentioned above.

The temperature sensing section 5 is a known temperature sensing device in which wax is sealed in a case and a protruding shaft 45 is made to protrude and retract from the case as the wax expands and contracts. An element guide 46 that protrudes further and is provided in the connecting portion between the front member 16a and the rear member 16b of the control valve liner 16 is slidably inserted and extends into the rear member 16b.

A cylindrical spring case 47 is screwed and housed in the rear member 16b.
A short cylindrical bush 48 having a flange portion at the front end is screwed onto the inner circumferential surface of the front opening, and an element presser 49 is slidably attached to the inner circumferential surface of the bush 48.

The rear part of the temperature sensing part 5 contacts the front surface of the element presser 49, and the protruding shaft 45 that protrudes freely from the rear end of the temperature sensing part 5 contacts the bottom of a receiving recess 50 recessed in the center of the front surface of the element presser 49. .

Further, the spring case 47 has a rear opening formed with a small diameter through a stepped portion 51, and the spindle 15 is inserted through this rear opening to engage the splines provided on both sides, and the stepped portion 51 and the element presser 49 are inserted into the spring case 47. A safety spring 14 is loaded between the two.

The spindle 15 has a control valve liner 16 at the rear.
The rear end is inserted through and extends to the side of the main body 17, and an adjustment handle 52 is attached to the outer end of the main body 17.

The spindle 15 has a flange 53 in the middle in the axial direction.
The flange 53 and a retaining ring 54 wound around the spindle 15 clamp the step 55 at the rear end of the control liner 16 to make it rotatable and fixed to the control valve liner 16 so that it cannot move forward or backward. be done.

Step portion 51 of the flange 35 and spring case 47
A correction spring 56 is loaded between the two.

When the adjustment handle 52 is operated and the spindle 15 is rotated, the spring case 47 moves forward, and the element presser 49 pressed by the safety spring 14 pushes the temperature sensing part 5 forward. The control valve body 4 moves forward through the element case 12 that engages with the adjustment handle 52 .
When the spring case 47 is rotated in the opposite direction, the spring case 47 moves backward, and the control valve body 4 is pressed by the spring 42 and moves rearward.

That is, by operating the adjustment handle 52, the distance between the control valve body 4 and the hot water valve seat 6 and between the control valve body 4 and the water valve seat 7, in other words, the temperature of the mixed water is set.

In this state, when the hot water on-off valve b and the water on-off valve c are opened, hot water is supplied through the hot water flow path 1 and water through the water flow path 2, respectively, and hot water is supplied to the hot water valve seat 6 and the control valve. The water passes through the gap between the body 4 and the hot water hole 41 of the control valve body 4, and the water passes through the gap between the water valve seat 7 and the control valve body 4 and the water hole 49 of the element case 12.
They each flow into the element case 12.

The hot water and water are mixed in the element case 12, flow while contacting the temperature sensing part 5, and mix through the mixed water hole 44 on the rear circumferential surface of the element case 12 and the through hole 39 on the circumferential surface of the liner 16. The water flows into the water flow path 3 and is selectively supplied to the bath spout 19 or the shower 20 via the bath/shower switching valve d.

At this time, changes may occur in the hot water supply or water supply pressure, and the temperature of the mixed water may become higher or lower than the set temperature.

When the temperature of the mixed water rises, the wax inside the temperature sensing section 5 expands and the protruding shaft 45 pushes out.

However, since the protruding shaft 45 engages with the receiving recess 50 of the element holder 49 and is held down by the bottom thereof, the temperature sensing part 5 moves forward, and the element case 12 moves forward accordingly, causing the control valve body to move forward. 4 is brought closer to the hot water valve seat 6 against the elastic force of the spring 42 and at the same time moved away from the water valve seat 7 to regulate the inflow of hot water and increase the inflow of water to lower the temperature of the mixed water.

Conversely, when the temperature of the mixed water falls below the set temperature, the operation is reversed to the above and the mixed water is always maintained at the set temperature.

Furthermore, when only water is to be discharged, the adjustment handle 52 is operated to bring the control valve body 4 into contact with the hot water valve seat 6 via the element case 12. Even if the control valve body 4 and the hot water valve seat 6 are not completely parallel and face each other, the hot water valve seat body 9 will swing within the guide member 11 using its protrusion 33 as a fulcrum, and the control valve body 4 will It comes in complete contact with the hot water valve seat 6 and can close the hot water.

(Effects) Since the present invention has the above configuration, it has the following advantages.

(1) Since the hot water valve seat body is able to swing freely about the protrusion relative to the guide member that supports it, the control valve body and the hot water valve seat may not be completely parallel due to manufacturing or assembly errors. Even if they face each other in a state where they are facing each other, they do not hit unevenly, and the hot water valve seat follows the control valve body and the two come into close contact with each other, so there is no leakage of hot water.

(2) Since the hot water valve seat body can swing freely relative to the guide member, even if the hot water is suddenly closed and the control valve body moves, the force of the movement will be buffered even if it hits the hot water valve seat surface of the hot water valve seat body. This prevents damage to the control valve body and hot water valve seat surface.

Therefore, durability is improved.

(3) A cage with a hole in the bottom of the hot water valve seat body;
Since the space between the hot water valve seat body and the guide member is in communication with the inside of the hot water valve seat body, the water in the space thermally expands due to the heat of the hot water flowing through the hot water flow path, causing the hot water valve seat body to expand. Stable mixed water can be obtained without pushing the water toward the hot water valve body.

(4) When the control valve body is seated on the hot water valve seat and the hot water valve seat body swings within the guide member, water between the hot water valve seat body and the guide member escapes into the hot water valve seat body through the hole. As a result, the movement of the hot water valve seat body is smooth.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view of a thermostatic mixing valve showing an example of the implementation of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is an enlarged sectional view of the main parts, and Fig. 4 is a conventional FIG. 2 is a sectional view showing an example of a thermostatic mixing valve. DESCRIPTION OF SYMBOLS 1... Hot water flow path, 2... Water flow path, 3... Mixed water flow path, 4... Control valve body, 5... Temperature sensing part, 6... Hot water valve seat, 7... Water valve seat, 8... ...Hot water valve seat surface, 9...Hot water valve seat body, 10...Guide hole, 11...Guide member, 32...Hole, 33...Protrusion, a...Control valve.

Claims (1)

[Scope of utility model registration request] A hot water flow path, a water flow path, a mixed water flow path that communicates with both of these flow paths via a control valve, and a control valve that is provided in the mixed water flow path in conjunction with the control valve body of the control valve and operates the control valve in response to the mixed water temperature. The thermostatic mixing valve is equipped with a temperature sensing part that automatically adjusts the temperature of the mixed water, and the control valve is composed of a hot water valve seat, a water valve seat, and a cylindrical control valve body disposed between both valve seats. A valve seat is formed on the opening side end surface of a bottomed cylindrical hot water valve seat body having a guide surface on the outer peripheral surface, and the bottom side of this hot water valve seat body has a guide hole whose inner diameter is larger than the outer diameter of the guide surface. It is fitted into the guide member so that the inner peripheral surface of the guide hole of the guide member guides the guide surface of the hot water valve seat body, and a protrusion is provided at the center of the bottom surface of the hot water valve seat body or the inner bottom surface of the guide hole. The valve seat body is made to be able to swing freely within the guide hole using this protrusion as a fulcrum, and a hole is bored in the bottom of the hot water valve seat body to separate the space between the guide member and the hot water valve seat body and the hot water valve seat body. A thermostatic mixing valve characterized by communicating with the inside.