JPS5837378A - Thermostat mixing valve - Google Patents

Abstract

PURPOSE:To prevent the entry of hot water into the titled valve even when a handle is turned erroneously by a method wherein a control valve body is thrusted by a projecting shaft and the body of a thermostat of thereby block a hot water passage. CONSTITUTION:In case where water only is discharged, a handle 37 is turned to a low temperature side whereupon a thermostat 32 moves to the left, the projecting shaft 33 of the thermostat 32 moves a control valve body 15 to the left and a hog water valve 13 and a hot water valve seat 12 are brought into contact with each other to thereby prevent the entry of the hot water into the valve. Next, when the handle 37 is turned further, the control valve body 15 is thrusted by the hot water valve seat 12, a spring 18 is compressed by the projecting shaft 33 of the thermostat and the body of the thermostat 32 thrusts the control valve body 15 directly so that the rotation of the handle 37 is regulated at the position where the valve body 15 is thrusted. Further, since the thermostat 32 is cooled by water, the projecting shaft 33 of the thermostat fits into the valve body 15 and a spring receiving seat 18 is moved to the right to come degree to become stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in thermostatic mixing valves.

Conventionally, there have been many structures for thermostatic mixing valves, including those disclosed in Japanese Patent Application Laid-Open No. 115425/1982, Japanese Patent Application Laid-Open No. 94974/1982, and Japanese Patent Application Laid-open No. 9767/1983.
It is known from Publication No. 6, etc.

Among these, the one described in Japanese Patent Application Laid-Open No. 56-97676 is explained. In this valve, the guide cylinder moves in the axial direction by rotating the handle, and when the guide cylinder moves forward and backward, the case of the sensing part moves via the holding plate. The temperature of the mixed water is automatically adjusted by moving the control valve body forward or backward via the spindle engaged with this, and bringing the control valve body into contact with the hot water layer valve seat or the water valve seat. It is adjustable.

By the way, when the above-mentioned valve discharges only water, if the handle is rotated all the way in the direction of low temperature, the control valve body moves forward most through the guide cylinder, presser plate, case of the temperature sensing part, and spindle, and the control valve The body comes into close contact with wII@valve seat and the discharge of tin is completely stopped. That is, when the handle is rotated all the way in the direction of low temperature, the control valve body comes into close contact with the operating valve seat at the end of rotation.

Therefore, if the control valve body is in close contact with the dynamic valve seat and the flow of hot water is stopped, if the handle rotates even slightly in the opposite direction (rotating in the direction of high temperature), the close contact between the control valve body and the dynamic valve seat will be immediately removed. As a result, hot water starts to flow in, and not only can only water be discharged, but the gas instantaneous boiler may be ignited unnecessarily, and the lagoon may be wasted.

The present invention solves the above-mentioned problem, and even if you accidentally touch the handle while discharging only water and the handle rotates in the direction of high temperature,
The purpose is to maintain close contact between the control valve body and the operating valve seat, and to reliably prevent the inflow of hot water.

The basic structure of the present invention is that a control valve body having a hot water valve that opens and closes a hot water flow path and a water valve that opens and closes a water flow path is connected to It closes the hot water flow path by pressing directly or indirectly.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 4, the valve [1] is formed into a hollow cylindrical body, and has a leakage inlet 2 on the left side and a water flow port 3 on the right side when viewed from the front. Bento! The inside is partitioned into a plurality of channels by M walls, and a hot water channel 4 leading to a hot water inlet 2 and a water channel 5 leading to a water flow port 3 are provided. The hot water flow path 4 and the water flow path 5 are separated by a gap W16, and an insertion lower is provided in the gap M6. An inlet 9 is provided in the partition wall 8 facing the partition wall 6, and a water valve seat 10 is formed on the side facing the partition wall 6. There is a septum on one side of the valve [1
! A valve seat body 11 facing the valve seat 6 is mounted on the same side as the lower insert, and a movable valve seat 12 is formed on the inner end surface of the valve seat body 11, that is, on the side facing the partition wall 6.

A control valve element 15 having a hot water valve 13 for controlling the hot water flow path 4 at one end and a water valve 14 for opening and closing the water flow path 5 at the other end is inserted into the insertion lower. The length of this control valve body 15 is formed to be smaller than the distance between the movable valve seat 12 and the water valve seat 10, so that the control valve body 15 moves in the axial direction and the water valve seat lO
Alternatively, it alternately approaches and separates from the movable valve seat 12.

There is a guide hole in the axis of the control valve body 15! 6 and a through hole 17 having a smaller diameter than the guide hole 16 are inserted through the guide hole 16 so as to be movable in the axial direction. It is pressed toward the hole 17 side. The spring 19 is prevented from coming off by a retaining ring 20.

The mixing channel 2 passes from the channel 4 through the vortex flow hole 21 and the inlet 9.
It is provided so that it can flow into 2. A spring 23 is loaded between the control valve body 15 and the valve seat body 11, and the control valve body 1
5 is the water valve seat! It is biased in the direction of pressing it to 0. ba=
Spring 19 has greater elasticity than spring 23.

Ben i! At the front end of f1, a casing 24 is connected to the control valve body 1-
A part of the circumferential surface of the casing 24 is cut out to form a passage 25. Casing 2
The inside of 4 is a mixing waterway 22 and a Natsti g0 casing 24.
One end abuts against the partition wall 8, and the other end abuts against a lid 27 screwed onto the valve housing 1, thereby preventing movement. Placement 27
A female threaded portion 28 is formed on the inner surface of the cylindrical thermostat holder 2 and 9 housed in the casing 24.
A male threaded portion 30 formed at the front end of the holder (hereinafter referred to as holder) is screwed into the female threaded portion 28. The holder 29 is
The operating shaft 31, which is inserted into the lid body 27 so that it can only rotate, is engaged with a spline or the like, and when the operating shaft 31 rotates, the holder 2
9 also rotates at the same time. Also holder 2
9 is screwed into the mounting body 27 and is movable in the axial direction. E) A thermostat 32 such as a wax type is internally fixed at the rear end of the W goo 29, and a retractable projecting shaft 33 of the thermostat 32 is provided facing the control valve body 15, as shown in the figure. In this case, the protruding shaft 33 is connected to the through hole 17.
It is inserted into the spring support 18 to volatilize the spring receiver 18. Holder 29
Portions 34 are formed by cutting out several portions of the surface, and the mixed water flowing into the casing 24 flows through the ports 34 and 2.
5 to an outflow passage 35 provided at the bottom of the valve [1]. A spring 36 is loaded between the lid body 27 and the holder 29, and biases the holder 29 in a direction toward the partition wall 8. A handle 37 is attached to the outer end of the operating shaft 31. The handle 37 has a set temperature for the mixed water.

A discharge pipe 38 communicating with the outflow passage 35 is attached to the lower part of the valve housing 1. 39 is a water faucet.

In this embodiment, when the handle 37 is rotated, the operating shaft 3
The holder 29 that engages with the lid body 27 also rotates in the same direction, but since the holder 29 is threadedly engaged with the lid body 27, it moves forward and backward at the same time as the rotation. When the handle 37 is rotated in the direction of setting the temperature of the mixed water to a high temperature, the holder 29 moves forward (
The protruding shaft 33 of the thermostat 32 no longer exerts volatilization pressure on the spring receiver 18. Therefore, the plow control valve body 15 is moved forward (in the direction of arrow q) by the elasticity of the spring 23, and the hot water valve 13 is moved away from the hot water layer valve seat 2, and is moved from the hot water flow path 4 to the hot water droplet passage hole 21 and the inlet 9. The amount of hot water flowing into the mixing channel 22 increases through the water valve 14, and the water valve seat lO
The mixing channel 22 is passed from the water channel 5 through the inlet 9 adjacent to the water channel 5.
The amount of water flowing into the channel is reduced, resulting in a high temperature mixed water, which is mixed into the water channel. 22, passes through the openings 34 and 5, flows out to the outflow path 35, and is discharged from the discharge w38 or the shower head.

If the temperature of the hot water supplied from a gas instantaneous water heater or the like to the hot water flow path 4 increases due to a drop in water pressure while the mixed water is being discharged, the temperature of the mixed water in the mixing water path 22 increases. becomes higher than the set temperature, the wax inside the thermostat 32 expands in response to the temperature of the water mixture, and acts in a direction to cause the protruding shaft 33 to protrude. When the protruding shaft 33 protrudes more a, the spring receiver 18
is pressed backward (in the direction of arrow Q'), but since the spring 19 is formed to have greater elasticity than the spring 23, the split valve body 15 moves backward (in the direction of arrow +310'), and the hot water valve 1
3 is close to the IJIII4g valve seat 12, and at the same time the water valve 1
4 moves away from the water valve seat 10.

Therefore, the amount of wax flowing into the mixing channel 22 decreases, and the amount of water increases. As a result, the temperature of the mixed water decreases and approaches the set temperature.

Furthermore, if the temperature of the mixed water becomes too low than the set temperature, the wax in the thermostat 32 contracts and the protruding shaft 33 fits into the door, so the plow valve body 15 is moved forward (arrow) by the elasticity of the spring 23. Q direction), the weight flowing into the mixing channel 22 increases and the amount of water decreases, and as a result, the temperature of the mixing voice rises and approaches the set temperature.

In addition, when only water is to be discharged, it is sufficient to rotate the handle 37 all the more in the direction of low temperature. As the handle 37 rotates, the thermostat 32 moves backward (in the direction of arrow Q').
3, the protruding shaft 33 presses the spring receiver 18 to move the control valve body 15 backward (in the direction of arrow Q'), and as shown in FIG. are in close contact and prevent hot water from flowing in. At this time, the main body of the thermostat 32 does not press the control valve body 15 yet. When the handle 37 is further rotated, the control valve body 15 is pressed against the valve seat 12 and cannot move any further, so the spring 19 is compressed against the protruding shaft 33 via the spring receiver 18. , the end face of the main body of the thermostat 32 directly volatilizes the control valve body 15,
Rotation of the handle 37 is restricted at that position. As the amount of water flowing into the mixing channel 22 increases, the thermostat 32 is cooled by the water, so the elasticity of the spring 19 exceeds the suppressing force of the protruding shaft 33 due to the insertion μ of the protruding shaft 33, and the spring receiver 18 moves forward (arrow Q direction) and stabilized at the position shown in Figure 4. Movement of the control valve body 15 due to temperature changes in the k-mouth water is prevented.

Next, the second embodiment shown in FIG. 5 will be explained. This embodiment is similar to the first embodiment described above, and in the first embodiment, the protruding shaft of the thermostat was arranged toward the rear.
In the second actual MM4IA, the protruding shaft of the thermostat is placed facing forward. To explain this embodiment in more detail, the valve [1 is formed similarly to the first embodiment, and the control valve body 1 is
5 is urged toward the water valve seat lO@ by a spring 23 which is elastically loaded between the valve seat body 11 and the valve seat body 11. Inside the casing 24, a thermostat holder 41 (hereinafter referred to as middle holder) is installed so as to be movable in the axial direction, and a thermostat 32 is fixed to the holder 41 with the protruding shaft 33 facing forward. An end plate 44 with a through hole 43 is fixedly mounted on the shaft J. A spring receiver 18 is housed inside the guide tube 42, and a spring 19 is elastically loaded.

The protruding shaft 33 of the thermostat 32 is brought into contact with the spring receiver 18 through the through hole 43 . The guide cylinder 42 is engaged with the operating shaft 31 through a spline or the like, and is provided so that as the operating shaft 31 rotates, the guide cylinder 42 rotates in the same direction and moves in the axial direction. The outer end of the operating shaft 31 has a first
A handle 37 is attached in the same manner as in the first embodiment.

In this embodiment, when the handle 37 is rotated, the operating shaft 3
The guide tube 42 that engages with the guide tube 1 also rotates in the same direction and moves in the axial direction. When the handle 37 is rotated in the direction of setting the temperature of the mixed water to a high temperature, the guide [42 moves forward (in the direction of arrow Q), so the spring receiver 18 no longer presses the protruding shaft 33 of the thermostat 32. Therefore, as the lifting valve 13 moves away from the lagoon valve seat 12, the amount of hot water flowing into the mixing channel 22 increases, and conversely, as the water valve 14 approaches the water valve seat 10, the amount of water flowing into the mixing channel 22 decreases. As in the first embodiment, the temperature of the mixed water rises to the set temperature.

If the temperature of the mixed water becomes too high than the set temperature, the thermostat 32 will be heated and the protruding shaft 33 will protrude more, but since the protruding shaft 33 is pressed by the spring bearing 18, the thermostat 32 will move backward (arrow Q). The control valve body 15, which is pressed by the holder 41, moves backward (in the direction of arrow Q') and acts to lower the temperature of the mixed water.

If the temperature of the mixed water becomes too low than the set temperature, the protruding shaft 33 of the thermostat 32 will fit, so the protruding shaft 3
3 is no longer pressed by the spring receiver 18. Therefore, control valve body 1
5 moves forward (in the direction of arrow Q) by the elasticity of the spring 23 and acts to raise the temperature of the mixed water.

In addition, when discharging only water, the handle 37 is set to low rj.
All you have to do is rotate it once more in the n+ direction. Handle; (7
As the guide tube 42 moves backward (in the direction of arrow Q') as Therefore, the control valve body 15 similarly moves rearward (in the direction of arrow Q') and comes into close contact with the hot water layer valve seat 12, thereby blocking the inflow of hot water.At this time, the guide r-42 still holds the main body of the thermostat 32 Do not press.Handle 3
7 is further rotated, the control valve body 15 is moved to the hot water layer valve seat 12.
As the guide cylinder 42 moves backward (in the direction of the arrow ''), the spring 19 is compressed, and the guide @42 pushes the main body of the thermostat 32. Press.

Therefore, even if the protruding shaft 33 moves in or out due to a temperature change of the water flowing into the mixing channel 22, the control valve body 15 does not move.

Since the present invention has the above-described configuration, when only water is to be discharged, the control valve body does not come into close contact with the hot water layer valve seat and the rotation of the handle is stopped instantaneously, but there is room for further rotation of the handle. Even if the handle is slightly reversed, the control valve body will not move and the inflow of hot water will be blocked.

Therefore, there is no unnecessary ignition of the gas instantaneous water heater, and no wasted use of hot water.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the first embodiment of the present invention, and FIG. 2 is a side sectional view of the first embodiment of the present invention.
3 and 41.1 are @ side views of the main section showing the operation procedure, and FIG. 5 is a side sectional view of the second embodiment.

Claims (1)

[Claims] A control valve body having a hot water valve that opens and closes the hot water flow path and a water valve that opens and closes the water flow path is movably equipped with Pg in a valve housing provided with a hot water flow path, a water flow path, and a mixed water flow path. A thermostat having a protruding shaft that appears and retracts in response to the temperature of the mixed water is movably provided in the mixed water flow path in conjunction with an operating mechanism that sets the temperature of the mixed water, and when the hot water valve is in the closed state. The main body of the thermostat and the protruding shaft are provided so as to press the control valve body directly or indirectly at the same time, and even within a predetermined range in which the thermostat retreats, the control valve body is pressed to close by the protruding shaft alone. A thermostatic mixing valve characterized by being provided as follows.