JP3482376B2 - Hot water supply control valve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control valve for supplying hot and cold water installed on a hot water supply path to, for example, a shower facility in a bathroom. The present invention relates to a hot / water supply control valve that can always supply mixed water of cold water within a predetermined set temperature range. 2. Description of the Related Art Generally, in a hot water supply system such as a shower facility, a mixture of hot and cold water from a water heater set to a desired appropriate temperature is supplied through a hot water supply path. [0003] However, in such a conventional hot water supply system, the difference in hot water supply temperature between summer and winter is severe. Particularly in winter, mixed water from the hot water supply system is used. Since the water is cooled while flowing through the hot water supply path and becomes cold water having a temperature equal to or lower than a predetermined set temperature, it may come out of the shower, thereby giving a feeling of discomfort to the human body. In addition, if the mixing of the cold water into the hot water becomes impossible due to a failure of the mixing faucet at the time of the shower, for example, abnormally high temperature hot water at a predetermined temperature or higher may come out of the shower, and thus, a burn or the like may occur. Poses a serious danger. The present invention has been made in view of the above circumstances, and has as its object to provide a hot water supply control valve which can always supply hot water and cold water within a predetermined set temperature range. I do. In order to achieve the above-mentioned object, the present invention is to provide a hot water / cold water mixed water supply path.
And has a hot water inlet 1A at one end and hot water at the other end.
A first on-off valve on the upstream side in a valve body 1 having an outlet 1B.
10 and the second on-off valve 20 on the downstream side are arranged in series,
Due to the mutual operation of the closing valves 10 and 20, mixing within the set temperature range is achieved.
Flow the mixed water to the hot and cold water outlet 1B side, and mix water below the set temperature.
Is the upstream (for cold water) drain opening on the wall of the valve body 1
3 to the drain tube 2 and mix water above the set temperature
Is the downstream (for hot water) drain opened on the wall of the valve body 1
For hot and cold water supply that flows to the drain pipe 2 through the port 7
The first on-off valve 10 on the upstream side, which is a control valve, is a split valve.
The upstream (for cold water) drain port 3 is closed by the ring 13
A first movable valve body 11 urged to open a valve
Valve mechanism and the temperature of mixed water above a predetermined low-level set temperature.
The heat-sensitive urging body 16 responding to the temperature
By extending and overcoming, the movable valve body 11
A movable valve element 14 provided to open a valve seat between
And the temperature of the mixed water below a predetermined low-level set temperature.
Of the heat-sensitive urging member 16 made of a shape memory alloy spring
Spring 15 that overcomes this with the shrinking action
The valve seat between the movable valve body 11 and the cylinder is closed by force,
Can be cylindrical against the spring 13 in conjunction with the valve closing action of
The upstream (for cold water) drain communicating with the drain pipe 2 is connected to the valve train 11
The movable valve element 14 connected to open the lane port 3
And the second valve mechanism thus configured, and the downstream side
The second on-off valve 20 is provided for mixing at a predetermined high level set temperature.
Heat-sensitive biasing of a shape memory alloy spring responsive to water temperature
When the body 23 is extended, the tubular valve body 25 flows out of hot water.
The valve 1B is closed and the downstream side connected to the drain pipe 2 is opened.
(For hot water) the cylindrical valve body 25 for opening the drain port 7;
A third valve mechanism including an integral movable valve body 21 and a predetermined height
Sensitive energizing in response to mixed water temperature below the level set temperature
When the body 23 contracts, the action of the spring 26
The hot water outlet 1B is opened and the movable valve body 2 is opened.
1 so that the downstream (for hot water) drain port 7 is closed.
By a fourth valve mechanism comprising a cylindrical valve body 25 provided on the body
Characterized in that the configuration was. That is, according to the present invention, by adopting the above-described structure, when the mixed water flowing from the hot water inlet side of the valve body is within a predetermined set temperature range, the first valve mechanism and the first valve mechanism are provided. The second valve mechanism is operated, and the mixed water having an appropriate temperature flows out of the hot water outlet. Further, when the mixed water is below the predetermined set temperature range, the first valve mechanism keeps the valve open, the second valve mechanism keeps the valve closed, and the mixed water flows from the upstream drain port to the outside of the valve body. As a result, cold water does not flow out of the hot and cold water outlet side. On the other hand, if the temperature of the mixed water is equal to or higher than the predetermined temperature range, the third valve mechanism and the fourth valve mechanism operate, and the mixed water is discharged from the downstream drain port to the outside of the valve body. In addition, there is no danger that hot water having an abnormally high temperature as in the past flows out of the hot water outlet. Further, since the opening / closing operation of each valve mechanism is performed by a combination of the expansion / contraction action according to the temperature change of the mixed water of the shape memory alloy spring, the responsiveness is improved and the entire valve mechanism is structurally simplified. Become Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the entire configuration of a hot water supply control valve, and FIG. 2 is a plan view. That is, the hot water supply control valve according to the present invention is, for example, a valve body 1 installed on a hot water supply path of a mixed water W of hot water and cold water from a water heater to a shower facility in a bathroom or the like.
And a drainage path connected to a cylindrical drainage receiver 2a having a drainage receiving chamber provided to be fitted and engaged with an engaging groove and an engaging step provided on the outer peripheral surface of the valve body 1 and communicating with the outside. And a drain tube 2 to be formed. The valve body 1 includes an upper cylindrical casing 1C.
And a female screw part on the upper part of the lower cylindrical casing 1D is connected in series with a lower male screw part, and connection screw parts are provided at both ends thereof. 1
A first on-off valve 10 provided on the upstream side, which is opened and closed in accordance with the temperature of the mixed water W flowing from the A side toward the other hot water outlet 1B side, and a second on-off valve provided on the downstream side It has an on-off valve 20. The upstream first opening / closing valve 10 is a drain for chilled water provided in an upper cylindrical casing 1C communicating with a drain pipe 2 connected to an annular drainage receiver 2a provided on an upstream outer peripheral surface of the valve body 1. A first cylindrical movable valve body 11 that opens and closes the port 3, and a valve hole (drain hole) 12 that is opened on a peripheral side surface of the cylindrical movable valve body 11 so as to correspond to the cold water drain port 3.
And a first spring 13 composed of a compression coil spring that constantly biases the cylindrical movable valve body 11 slidably in the axial direction downstream of the valve body 1 (valve closing direction). An annular chamber 3a communicating with the cold water drain port 3 is provided inside the cold water drain port 3, that is, in the circumferential direction of the inner peripheral surface of the upper cylindrical casing 1C. The upstream end of the first spring 13 is supported by an annular annular support member 4 having a plurality of steps having hot and cold water introduction holes 4A. Engages with a ring-shaped stopper 4b which engages with a locking groove provided in the upper casing 1c.
The spring 13 is an inwardly-stepped portion 11 integrally bent and provided below the large-diameter tubular portion 11b of the tubular movable valve body 11.
c. An annular valve seat 1 having a small inner diameter, which is integrally bent and connected to the inward stepped portion 11c and is provided concentrically with the large-diameter cylindrical portion 11b so as to protrude downstream.
1a. A first valve mechanism is constituted by the cylindrical movable valve body 11, the valve hole 12, and the spring 13. The cylindrical movable valve body 11 includes an upper casing 1
c so as to be slidable in the axial direction in a fluid-tight manner on the inner peripheral surface of the cylindrical movable valve body 11 and to engage with the inward step (flange) 11c of the cylindrical movable valve body 11; A valve opening in the cylindrical movable valve body 11 is formed by a spring 13 composed of a compressed coil that engages with the outer flange 4c of the annular support member 4 formed by bending the inner annular flange 4e in a stepwise manner. 12 is constantly urged to be at a position facing the drain port 3. An annular groove 3a is provided on the inner peripheral surface of the upper casing 1c at the same level as the drain port 3 for cold water, and the cylindrical movable valve element 11 is formed by the annular groove 3a.
Is drained from the drain pipe 2 while the valve hole 12 and the annular groove 3a communicate with each other even if the valve rotates horizontally about the axial direction. Further, the peripheral edge portion 11a on the downstream side of the cylindrical movable valve body 11 also serves as an annular valve seat.
A substantially cap-shaped first portion having a large-diameter cylindrical portion 14b integrally formed with the annular flange portion 14a and having a cylindrical head portion 14c having an upstream end closed at the inside thereof. Is inserted from the downstream side.
An annular flange portion 14a formed on the downstream peripheral edge of the movable valve body 14 is formed so as to be able to contact and separate from the annular valve seat 11a.
Is loosely fitted in the central through hole. Further, a second spring 15 having a larger biasing force (spring constant) than the first spring 13 is inserted concentrically from the downstream side into the movable valve body 14, and the upper end thereof is formed. The movable valve element 14 is engaged with an intermediate annular flange at the lower end of the head. The second spring 15 has a disk-like shape having a hole for introducing hot and cold water, the downstream end of which is engaged with an inward step on the downstream side (lower end) of the upper casing 1 </ b> C in the valve body 1. While being engaged with the support plate 5, it is fitted and held on the head of the holding member 6 fixed to the support plate 5, and constantly biases the movable valve body 14 in the axial direction on the upstream side. Flange (valve) 14a
Is brought into contact with the annular valve seat 11a to maintain the valve closed state. The support plate 5 is
The upper casing 1C is always in the downstream direction by the movable valve element 14, the first cylindrical movable valve element 11, and the spring 15 which is indirectly engaged with the support member 4 via the spring 13.
, And does not move upstream. The spring constant of the spring 15 is set to be larger than the spring constant of the spring 13 arranged in the compressed state. Further, between the base side of the annular flange portion 14a of the movable valve body 14 and the intermediate annular flange 4d of the annular support member 4, a compression coil 16 of a shape memory alloy spring as a first heat-sensitive responsive means is provided. And the movable valve element 14 can be moved downstream against the urging force of the second spring 15 by the extension operation accompanying the heat-sensitive response of the heat-sensitive urging element 16. It is to be energized. Also, the upstream drain port 3 is closed by the spring 13 moving the first tubular movable valve body 11 in the downstream direction together with the movement of the movable valve body 14 in the downstream direction. The annular valve seat 11a, the movable valve body 14,
Flange 14a, spring 15 and heat-sensitive urging body 16
Constitutes a second valve mechanism. In this case, the range of movement of the tubular movable valve element 11 to the downstream side is regulated by, for example, a stopper 17 formed of an inwardly projecting step formed on the inner peripheral wall surface of the valve body 1. Until the body 11 comes into contact with the stopper 17, the cylindrical movable valve body 11 and the movable valve body 14 engage with each other in the closed state of the annular valve seat 11a and the flange portion 14a, which are the engagement portions thereof. Hold and move together downstream. That is, the heat-sensitive urging member 16 of the second valve mechanism
In the hot water supply initial standby state, the spring 15 is connected to the cold water drain port 3 communicating with the drain pipe 2 provided on the peripheral side surface of the valve body 1 so that the valve hole 12 of the cylindrical movable valve body 11 corresponds to the spring 15. Positioning is performed by a balance relationship with the spring 13. Thus, the first valve mechanism maintains the open state of the cold water drain port 3. On the other hand, the second on-off valve 20 is provided with a hot water drain port 7 communicating with the drain pipe 2 provided on the downstream side of the valve body 1.
And a second cylindrical movable valve body 21 that can close the valve. The second cylindrical movable valve body 21 has a form of a two-stage wide and narrow cylindrical body, and the outermost large-diameter cylindrical part 21a is provided with a liquid in the axial direction on the inner peripheral surface of the lower casing 1D. An inwardly-facing annular flange 21b is integrally bent and formed at an intermediate portion of the tubular movable valve body 21, and a small-diameter tubular portion is integrally formed on an inner diameter side of the inwardly-facing annular flange 21b. The small-diameter cylindrical portion 21c has an annular flange 21d integrally bent inward at a downstream end thereof, and a coil-shaped shape memory alloy spring is formed on the upper surface of the annular flange 21d. The lower part of the heat-sensitive urging element 23 formed of a compression spring is engaged, and the upper part of the heat-sensitive urging element 23 is concentrically arranged at the inner middle part of the cylindrical valve element 1. It is engaged with a bearing flange 8 a of the support member 8. When the mixed water of a predetermined temperature or more flows in by the heat-sensitive urging element 23 made of the shape memory alloy spring, the cylindrical valve element 25 engaged with the annular flange 21d.
Is seated and closed with the annular lower end thereof pressed against the annular valve seat 9 of the lower casing 1D. A hot water inlet 22 communicating with a hot water outlet 1B at the downstream end of the valve body 1 is provided on the inward annular flange 22b of the second cylindrical movable valve body 21 at circumferential intervals. I have. The movable valve element 21 is provided in the lower casing 1.
D is slidably fitted on the inner peripheral surface of the intermediate portion of D in a liquid-tight manner, and the upper end portion of the movable valve body 21 is engaged with the lower end surface of the upper casing 1C, so that it is prevented from moving in the upstream direction, The distal end of the tubular valve body 25 is set to be seated on the annular valve seat 9 before the lower surface of the annular flange 21b engages with the intermediate inward step 27 of the lower casing 1D. A plurality of downstream drain ports (hot water drain ports) 7 are provided on the peripheral wall of the lower casing 1D near the lower surface of the joint with the upper casing 1C at intervals in the circumferential direction.
Is provided at a position close to the lower end surface of the upper casing 1C. Therefore, immediately after the cylindrical movable valve element 21 is separated from the lower surface of the upper casing 1C, the high-temperature mixed water having a predetermined temperature or higher can be drained from the downstream drain port 7 communicating with the outside. One end surface of a cylindrical support member 8 is fixed to the downstream side of the support plate 5 having the hot and cold water supply holes by welding or the like, and an annular support projecting radially outward on the downstream side of the cylindrical support member 8. A flange 8a is provided, and the bearing flange 8 is provided.
A heat-sensitive urging element 23 as a heat-sensitive responsive means composed of a compression spring 23 of a shape memory alloy spring is provided between a and the inward annular flange 21d of the cylindrical movable valve element 21. That is, a shape memory as a heat-sensitive responsive means is assembled via a flanged cylindrical support member 8 in which one end of the movable valve body 21 is fixed to the lower surface of the support plate 5 having a hot water supply hole by welding or the like. The extension of the heat-sensitive urging element 23 made of a compression coil spring made of an alloy spring accompanying the heat-sensitive response is slidably urged in the valve opening direction along the axial direction of the valve body 1. The annular valve seat 9 is closed by moving the cylindrical valve body 25 in the downstream direction. The movable valve body 21 and the hot water inlet 22
The heat-sensitive urging element 23 constitutes a third valve mechanism. Further, the second on-off valve 20 has one end fixed to the cylindrical support member 8 or the holding member 6 by welding or the like, and extends in the axial direction on the downstream side of the valve body 1.
4 A cylindrical valve element 25 that can slide relatively liquid-tight in the axial direction of the valve main body 1 in coordination with the elongating operation accompanying the heat-sensitive response of the heat-sensitive urging element 23 is inserted into the cylindrical guide member 24. The annular distal end portion 25a having an arc-shaped cross section on the downstream side of the cylindrical valve body 25 is opened with respect to the annular valve seat 9 formed at the hot and cold water outlet 1B at the downstream end portion of the valve body 1. The upstream inward flange 25b of the cylindrical valve body 25 and the outward flange 24a of the cylindrical guide member 24 are maintained.
And is constantly urged by the urging force of a spring 26 formed of a compression coil spring disposed between them. The annular valve seat 9, the cylindrical guide member 24, the cylindrical valve body 25, and the spring 26 constitute a fourth valve mechanism. By the way, the heat-sensitive urging body 16 composed of a compression coil spring of a shape memory alloy spring as the first heat-sensitive responsive means constituting the first on-off valve 10 is, for example, in a case where the temperature of the mixed water W is 30 ° C. or less. 30 ° C
As described above, it is set so that the extension operation is performed rapidly. Further, the heat-sensitive urging element 23 composed of a compression coil spring of a shape memory alloy spring as the second heat-sensitive responsive means constituting the second on-off valve 20 extends, for example, when the temperature of the mixed water W is lower than 50 ° C. Use a shape memory alloy spring that is set so that it does not operate, and that suddenly expands at a temperature of 50 ° C. or higher, and automatically returns to its original shape at a temperature lower than 50 ° C. To Next, the control operation of the hot water supply control valve according to the present invention based on the hot water temperature will be described with reference to the drawings shown in FIGS. Note that when the mixed water W is not flowing in the hot water supply path, or when the mixed water (cool water: for example, 30 ° C. or less) W remaining in the hot water supply path and having a predetermined temperature range or less flows, the initial state of hot water supply is assumed. Fig. 1
As shown in FIG. 1, the first valve mechanism that constitutes the first on-off valve 10 keeps the valve open and the second valve mechanism keeps the valve closed, while the third valve that makes up the second on-off valve 20 The fourth valve mechanism maintains the valve closed state, and the fourth valve mechanism maintains the valve open state. This allows
Mixed water W having a temperature equal to or lower than a predetermined set temperature range is drained from the cold water drain port 3 to the outside of the valve body 1 through the drain pipe 2 as indicated by a solid arrow. In this state, the temperature within a predetermined set temperature range (30 ° C. or higher) from the hot water inlet 1 A on the upstream side of the valve body 1.
When the mixed water W flows in, the heat-sensitive urging body 16 extends and the movable valve body 14 is forcibly moved downstream as shown in FIG. Then, at the same time that the movable valve body 11 is forcibly moved to the downstream side, the cylindrical movable valve body 11 follows the downstream side by the urging force of the spring 13 to close the chilled water drain port 3. At this time, the flange portion 14a of the movable valve body 14 maintains a closed state with respect to the annular valve seat 11a of the cylindrical movable valve body 11 by the urging force of the spring 15. When the cold water drain port 3 is closed by the cylindrical movable valve body 11 and the heat-sensitive urging body 16 further extends, the cylindrical movable valve body 11 is moved to the inner peripheral wall surface of the valve body 1. At the same time, the movable valve element 14 is forcibly moved downstream against the urging force of the spring 15, as shown in FIG. . Thereby, the valve opening operation is performed so that the flange portion 14a of the movable valve body 14 is separated from the annular valve seat 11a of the cylindrical movable valve body 11, and a predetermined setting that flows in from the hot water inlet 1A on the upstream side of the valve body 1. The mixed water W at an appropriate temperature (30 ° C. or higher) within the temperature range is supplied to the movable valve constituting the third valve mechanism of the hot water flow rate adjusting plate 5 and the second on-off valve 20 as shown by the solid arrow in FIG. The hot water flows out of the hot water outlet 1B of the valve body 1 through the hot water inlet 22 of the body 21, and hot water is supplied to shower equipment (not shown). On the other hand, in such a hot water supply state, due to, for example, failure of the mixing faucet, abnormally high temperature hot water (hot water: for example, 50 ° C. or more) W equal to or higher than the predetermined set temperature is caused by the hot and cold water When flowing from the inlet 1A, as shown in FIG. 5, the heat-sensitive urging member 23 formed of a compression coil spring of a shape memory alloy spring constituting the third valve mechanism of the second on-off valve 20 rapidly expands. The movable valve element 21 moves toward the downstream side of the valve main body 1 by the extension operation accompanying the heat-sensitive response of the heat-sensitive urging element 23 to open the hot water drain port 7, and at the same time, to perform the fourth operation. The cylindrical valve body 25 constituting the valve mechanism moves toward the downstream side of the valve body 1 against the urging force of the spring 26, and closes the annular valve seat 9 formed at the hot and cold water outlet 1B. As a result, the abnormally high-temperature hot water W that flows in from the hot water inlet 1A of the valve body 1 and has a temperature equal to or higher than a predetermined set temperature range is used as shown in FIG.
As shown by a solid line arrow, the water is drained from the hot water drain port 7 to the outside of the valve body 1 through the drain pipe 2, and the valve body 1
Out of the hot water outlet 1B. By the way, in the hot water supply state at an appropriate temperature by the first on-off valve 10 shown in FIG. 4, the mixed water W having a predetermined temperature range or less is supplied from the hot water inlet 1A on the upstream side of the valve body 1.
When the temperature of the mixed water W remaining in the valve body 1 falls below a predetermined set temperature range due to inflow of hot water or the stop of hot water supply, the heat-sensitive energizing The body 16 is contracted, the movable valve body 14 moves toward the upstream side by the urging force of the spring 15, and the flange portion 14a of the movable valve body 14 is connected to the annular valve seat 11a at the end of the cylindrical movable valve body 11. The valve is closed upon contact. Thereby, the inflow of the mixed water W below the predetermined set temperature range to the downstream side is blocked. When the heat-sensitive urging element 16 further contracts, the movable valve element 14 also moves further upstream, and at the same time, the cylindrical movable valve element 11 is directed upstream against the urging force of the spring 13. The cold water drain port 3 is opened by moving the valve hole 12 so as to correspond to the cold water drain port 3, thereby maintaining the hot water supply initial standby state as shown in FIG. In the shut-off state of the second on-off valve 20 due to the inflow of the abnormally high temperature hot water W shown in FIG. 5, the inflow of the abnormally high temperature hot water W is stopped, and the mixed water W flowing into the valve body 1 is stopped. When the temperature has reached an appropriate temperature, the movable valve element 21 moves toward the upstream side of the valve body 1 by the contraction operation accompanying the heat-sensitive response of the heat-sensitive urging element 23, and closes the hot water drain port 7. At the same time, the cylindrical valve body 25 also moves toward the upstream side of the valve body 1 by the urging force of the spring 26, and
Is opened. This enables a hot water supply state at an appropriate temperature as shown in FIG. In the above-described embodiment of the present invention, the heat-sensitive urging element 1 composed of a compression coil spring of a shape memory alloy spring constituting the first and second on-off valves 20 respectively.
The operating temperatures 6 and 23 are appropriately set depending on the use environment and use conditions. As described above, the hot / water supply control valve according to the present invention has the first configuration in which the mixed water flowing from the hot water inlet side of the valve body is within a predetermined set temperature range. The valve mechanism and the second valve mechanism are operated, and the mixed water at the appropriate temperature flows out of the hot water outlet, so that the hot water supply at the appropriate temperature can be reliably performed. When the temperature of the mixed water is lower than the predetermined temperature range, the first valve mechanism maintains the open state, the second valve mechanism maintains the closed state, and the mixed water flows through the upstream drain port from the upstream drain port. Since the water is drained to the outside of the main body, cold water having a temperature equal to or lower than a predetermined set temperature as in the past is not supplied, and therefore, no discomfort is given to the human body. On the other hand, if the temperature of the mixed water is higher than the predetermined temperature range, the third valve mechanism and the fourth valve mechanism are operated, and the mixed water is discharged from the downstream drain port to the outside of the valve body. Therefore, the abnormally high temperature hot water does not flow out from the hot water outlet side as before, and there is no danger of causing serious danger such as burns. Further, since the opening and closing operation of each valve mechanism is performed by a combination of the expansion / contraction action of the heat-sensitive urging member composed of the compression coil spring of the shape memory alloy spring due to the temperature change of the mixed water, Responsiveness, and
While simplifying the overall structure of the valve mechanism,
Malfunction can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional side view showing a valve closing state of a hot water supply control valve in a hot water supply initial standby state. FIG. 2 is a plan view showing an embodiment of a hot water supply control valve according to the present invention. FIG. 3 is a vertical sectional side view showing a state in which the hot / water supply control valve is in the middle of operation when hot water is supplied. FIG. 4 is a vertical sectional side view showing a hot-water supply state of the hot-water supply control valve at an appropriate temperature. FIG. 5 is a vertical sectional side view showing an operating state of the hot water supply control valve when hot water flows in the same. [Description of Signs] 1 Valve body 1A Hot and cold water inlet 1B Hot and cold water outlet 1C Upper cylindrical casing 1D Lower cylindrical casing 2 Drain pipe 2a Cylindrical drainage receiver 3 Upstream drain port (cold water drain port) 3a Annular chamber 4 Annular Support member 4A Hot water introduction hole 4c Outer annular flange 4d Intermediate annular flange 4e Inner annular flange 4d 5 Hot water flow rate adjusting plate 6 Holding member 7 Downstream drain port (drain port for hot water) 8 Cylindrical support member 8a Bearing flange 9 Ring Valve seat 10 First on-off valve 11 First cylindrical movable valve body 11a Annular valve seat 11c Inward step (flange) 12 Valve hole 13 Spring 14 Movable valve body 14a Flange part 15 Spring 16 First heat-sensitive urging Body 17 Stopper 20 Second on-off valve 21 Second cylindrical movable valve body 21a Large-diameter cylindrical part 21b Inwardly-facing annular flange 21c Small-diameter cylindrical Min 21d annular flange 22 the hot water inlet port 23 and the second heat sensitive biasing member 24 the tubular guide member 25 the tubular valve body 26 a spring 27 intermediate portion facing stepped portion W mixed water

Claims (1)

(57) [Claims] [Claim 1] Installed on a mixed water supply path of hot water and cold water
Has a hot water inlet 1A at one end and a hot water inlet at the other end.
A first on-off valve 1 on the upstream side is provided in a valve body 1 having an outlet 1B.
0 and the second on-off valve 20 on the downstream side are arranged in series,
Mixing within the set temperature range by the mutual operation of the valves 10 and 20
Flow the water to the hot water outlet 1B side, and mix water below the set temperature.
Upstream (for cold water) drain port 3 opened on the wall of valve body 1
Through the drain pipe 2 and mix water above the set temperature
Is the downstream (for hot water) drain opened on the wall of the valve body 1
For hot and cold water supply that flows to the drain pipe 2 through the port 7
A control valve, wherein the upstream first open / close valve 10 is connected to the upstream (for cold water) drain port by a spring 13.
3 from the cylindrical movable valve body 11 urged to close the valve.
A first valve mechanism that is sensitive to the temperature of the predetermined low level set temperature or more mixing water
The heat-sensitive urging element 16 overcomes the action of the spring 15 and extends.
By long operation, the valve seat between the cylindrical movable valve element 11 is opened.
The movable valve body 14 is provided so that
Shape due to mixed water temperature below a certain low level set temperature
As the heat-sensitive urging element 16 made of a memory alloy spring is contracted,
It can be moved in a cylindrical shape by the spring force of the spring 15 that overcomes this.
While closing the valve seat between the valve body 11 and the valve closing operation
In conjunction therewith, the cylindrical movable valve body 11 is
Connect the upstream (for cold water) drain port 3 to the drain pipe 2
It is constituted by a movable valve body 14 connected so as to open the valve.
Which was formed from the second valve mechanism, the second on-off valve 20 on the downstream side, the shape sensitive to the temperature of the mixed water on the predetermined high level setting temperature
The heat-sensitive urging member 23 made of a shape memory alloy spring performs an extension operation.
Thus, when the cylindrical valve body 25 closes the hot and cold water outlet 1B,
At the downstream (for hot water) drain port leading to the drain pipe 2
The movable valve element 21 integral with the cylindrical valve element 25 that opens the valve 7
A Ranaru third valve mechanism, and responsive to a predetermined temperature of the high level setting temperature following mixed water
When the heat-sensitive urging element 23 is contracted, the spring 26
The hot water outlet 1B is opened by the action of
The valve body 21 closes the downstream (for hot water) drain port 7.
Valve mechanism composed of a cylindrical valve body 25 integrally provided as described above
A hot and cold water supply control valve characterized by comprising: