JP2009121584A - Temperature control valve for drainage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature control valve for drainage capable of preventing human risk or deformation of a drainage pipe by draining water in a state in which the temperature is lowered by mixing room-temperature water when hot water drained from a hot-water storage tank is not lower than a predetermined temperature. <P>SOLUTION: This temperature control valve 1 for drainage provided in a hot water drainage path comprises a valve body 2 provided with a main flow path 5 for passing hot water and an opening 7 for supplying room-temperature water to the main flow path 5, a valve body 10 for opening/closing the opening 7, enerdizing means 13 for enerdizing the valve body 10 in a valve-closing direction, and a shape memory spring 14 provided in the main flow path 5, returned to a memory state at a predetermine temperature or higher, and moving the valve body 10 in a valve-opening direction against an energizing force of the energizing means 13. When hot water of high temperatures passes through the main flow path 5, the shape memory spring 14 is deformed to open the valve body 10, and the room-temperature hot water flowing in the main flow path 5 via the opening 7 and the hot water are mixed, so as to lower the temperature of drainage water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a temperature adjusting valve for drainage that adjusts a drainage temperature when draining hot water from a hot water storage tank for home use or business use.

  Hot water at a predetermined temperature is usually stored in a hot water storage tank for home use or business use. However, the hot water in the tank is once drained when necessary, for example, during maintenance of the hot water supply facility or when cleaning the hot water storage tank. Patent Document 1 below describes that when the temperature in the hot water storage tank is overheated to a predetermined temperature or higher due to some failure, the hot water in the tank is discharged.

Japanese Patent Laid-Open No. 11-141710

  However, when the hot water in the hot water storage tank is hot, if it is drained in a high temperature state, there is a human danger such as touching the hot water after draining and causing burns. In addition, when resin pipes are used as drain pipes, the drain pipes may be adversely affected by hot water deformation, so the drain pipes themselves must be made of special heat-resistant pipes. , Piping costs will increase.

  Therefore, the present invention has been made for the purpose of solving the above-mentioned conventional problems, and if hot water drained from a hot water storage tank or the like is at a predetermined temperature or higher, normal temperature water is mixed to lower the temperature. It is intended to provide a temperature adjusting valve for drainage that can prevent human danger and deformation of a drain pipe by draining in a state.

  In order to achieve the above object, the present invention adopts as a solution means a temperature adjusting valve for drainage provided in a hot water drainage channel, and a main flow path through which hot water passes and normal temperature water for the main flow channel A valve body provided with an opening for supplying the valve, a valve body for opening and closing the opening, an urging means for urging the valve body in a valve closing direction, and provided in the main flow path at a predetermined temperature or higher. A shape memory spring that returns to the storage state and moves the valve body in the valve opening direction against the urging force of the urging means, and normal temperature water that flows into the main flow path through the opening, and The hot water passing through the main channel is mixed and drained. According to such a configuration, when the hot water passing through the main channel is at a predetermined temperature or higher, the shape memory spring is deformed in the extending direction, and the valve body is moved in the valve opening direction to open the opening. Water flows in and hot water and room temperature water are mixed to lower the drainage temperature.

  Moreover, in the said structure, it is preferable to set it as the structure which mixes normal temperature water and hot water downstream from the installation position of a shape memory spring. If normal temperature water and hot water are mixed at the position where the shape memory spring is provided, low temperature normal temperature water may act on the shape memory spring and cause a transformation in the shape memory spring, but on the downstream side of the shape memory spring. By mixing the normal temperature water and hot water, the shape memory spring can always open and close the opening in response to the temperature of the hot water drained.

  Further, in this case, a partition wall is provided between the shape memory spring and the opening and the upper end is connected to the inner wall of the valve body and is suspended from the connection position, and the partition wall is parallel to the main flow path inside the valve body. By forming a sub-flow channel for room temperature water and mixing the room temperature water and hot water on the downstream side of the partition wall, it is possible to prevent the room temperature water from directly affecting the shape memory spring.

  Further, in the above configuration, the valve body is provided movably along the main flow path, opens and closes the opening, and a through-hole through which hot water passes is formed at the axial center thereof. The valve body may be urged in the valve closing direction from the downstream side, and the shape memory spring may be provided on the upstream side of the valve body. Also in this case, since the shape memory spring is located on the upstream side of the opening, it is possible to prevent normal temperature water from directly affecting the shape memory spring.

  According to the temperature control valve for drainage according to the present invention, when the hot water passing through the main channel is higher than a predetermined temperature, the shape memory spring provided in the main channel is deformed in the extending direction by returning to the memory state. Since the opening is opened by moving the valve body in the valve opening direction against the urging means that urges the valve body in the valve closing direction, normal temperature water can flow into the main flow path. The drainage temperature can be lowered by mixing hot water and normal temperature water in the road. Accordingly, the temperature of the hot water drained downstream from the temperature regulating valve for drainage is low, and the drainage can be performed at a safe temperature that does not cause burns even if it touches the human body. In addition, since the temperature of the drainage is low, the heat resistance temperature of the downstream drainage pipe can be lowered, and piping can be performed using an inexpensive resin pipe, so that the piping cost can be reduced.

  In addition, by mixing the normal temperature water and hot water downstream of the shape memory spring, the normal temperature water flowing into the main flow path can be prevented from lowering the temperature of the shape memory spring, and the shape memory spring is always drained. Therefore, the valve body can be opened and closed accurately and stably.

  In particular, a partition wall is provided between the shape memory spring and the opening, and the partition wall forms a sub-flow path of normal temperature water parallel to the main flow path inside the valve body, and mixes the normal temperature water and hot water downstream of the partition wall. With this configuration, it is possible to satisfactorily prevent normal temperature water flowing into the main flow path from lowering the temperature of the shape memory spring.

  Further, the valve body is provided so as to be movable along the main flow path so as to open and close the opening, and a through-hole through which hot water passes is formed in the shaft center, and the urging means is provided downstream of the valve body. Since the shape memory spring is located upstream of the opening, the shape memory spring flows into the main flow path even when the shape memory spring is urged in the valve closing direction and the shape memory spring is provided upstream of the valve body. It is possible to satisfactorily prevent the normal temperature water from lowering the temperature of the shape memory spring.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 to FIG. 5 are views showing a first embodiment of a drainage temperature adjustment valve, and this drainage temperature adjustment valve is provided in a drainage channel for draining hot water from a hot water storage tank or the like, for example. FIG. 1 is a longitudinal sectional view of a temperature regulating valve 1 for drainage, and FIG. 2 is a sectional view taken along line AA of FIG. 3 is a bottom view of the temperature adjusting valve 1 for drainage, and FIG. 4 is a right side view. The drainage temperature control valve 1 includes a valve body 2 that allows hot water to pass therethrough, and an upper part of the valve body 2 is provided with an inflow portion 3 that is connected to a hot water storage tank or the like and into which drained hot water flows. Is provided with an outflow portion 4 through which hot water flows out to the drainage pipe on the downstream side. Inside the valve body 2, the inflow portion 3 and the outflow portion 4 communicate with each other through a main flow path 5 through which hot water passes. A cylindrical water supply unit 6 is provided on the side of the valve body 2, and an opening 7 that communicates with the main flow path 5 is provided inside the water supply unit 6. A water supply pipe for supplying normal temperature water is connected to the water supply unit 6, and normal temperature water can be supplied to the main flow path 5 inside the valve body 2 through the opening 7.

  The drain temperature control valve 1 is provided with a valve rod 8 provided so as to cross the main flow path 5, and one end of the valve rod 8 slides on a valve rod holder 9 provided on the side of the valve body 2. The other end is inserted through the inside of the opening 7 and extends to the inside of the water supply unit 6, and the valve body 10 made of an elastic member or the like is attached to the tip of the valve body holder 10 a or the like. It is fixed by. The opening edge of the opening 7 is slightly protruded toward the water supply unit 6 and constitutes a valve seat 11 to which the valve body 10 contacts and separates. Therefore, the valve body 10 opens and closes the opening 7 in conjunction with the valve stem 8.

  Further, an inner plate 12 is provided inside the water supply unit 6 at a predetermined interval from the opening 7, and the tip shaft 8 a of the valve rod 8 is inserted into the center of the inner plate 12 to move the valve rod 8. And a plurality of water supply holes 12b through which room temperature water passes are provided around the center hole 12a (see FIG. 4). Between the inner plate 12 and the valve body 10, an urging means 13 such as a spring for urging the valve body 10 in the valve closing direction is provided. Therefore, both the urging force by the urging means 13 and the urging force due to the water pressure of normal temperature water act on the valve body 10 and urge it in the valve closing direction.

  Further, the valve stem 8 is provided with a flange portion 8b located in the main flow path 5. Between the flange portion 8b and the valve stem holder 9, a shape memory spring in which the periphery of the valve stem 8 is spirally wound. 14 is provided. The shape memory spring 14 is formed of a shape memory alloy such as a NiTi alloy in a coil spring shape. The spring is in a contracted state below a predetermined temperature, and the shape memory alloy transforms and returns to a memory state above a predetermined temperature. The spring is configured to be deformed in the extending direction. The predetermined temperature at which the shape memory spring 14 is deformed in the extending direction can be set as appropriate. In the case of the present embodiment, for example, the temperature of hot water passing through the main flow path 5 may pose a risk of burns to the human body. It is set below the temperature, or set as the heat resistant temperature of the drain pipe connected to the outflow part 4.

  When the drainage temperature regulating valve 1 having the above-described configuration is installed in the drainage channel, the shape memory spring 14 is in a contracted state when drainage is not performed, and the valve body 10 is provided with the water supply section 6 as shown in FIG. The opening 7 is closed by the urging force received from the urging means 13 provided in the water and the water pressure of room temperature water. Even when drainage is performed, if the temperature of the hot water is lower than a predetermined temperature at which the shape memory spring 14 is transformed, the shape memory spring 14 is still in a contracted state, and the valve body 10 is in a contracted state as shown in FIG. The opening 7 is closed by the urging force received from the urging means 13 provided in the water supply unit 6 and the water pressure of room temperature water.

  On the other hand, when hot water having a temperature higher than a predetermined temperature at which the shape memory spring 14 transforms is drained, the shape memory spring 14 reacts with the hot water flowing through the main flow path 5 as shown in FIG. The valve body 10 is deformed in the extending direction (F direction), and the valve body 8 is pressed in the valve opening direction against the urging force of the urging means 13 provided in the water supply unit 6 and the water pressure of room temperature water to open the valve body 10 to the valve seat 11. And the opening 7 is opened. At this time, room temperature water flows into the main flow path 5 of the valve body 2 through the opening 7, and hot water and room temperature water are mixed to lower the temperature of the drainage. Then, when drainage from the hot water storage tank stops and the shape memory spring 14 becomes a predetermined temperature or less, the shape memory spring 14 transforms again and returns to the original contracted state. Along with this, the valve stem 8 receives the action of the urging force of the urging means 13 and the water pressure of room temperature water, moves the valve body 10 in the valve closing direction, and closes the opening 7. Therefore, in the drain temperature adjusting valve 1 of the present embodiment, the shape memory spring 14 provided in the main flow path 5 is deformed in the extending direction in response to hot water having a predetermined temperature or more, and moves the valve rod in the valve opening direction. The room temperature water flowing into the main flow path 5 through the opening 7 and hot water passing through the main flow path 5 can be mixed to lower the drainage temperature.

  By the way, when normal temperature water flowing into the main flow path 5 through the opening 7 directly touches the shape memory spring 14, the temperature of the shape memory spring 14 is lowered to cause contraction deformation, and the flowing hot water is at a predetermined temperature or higher. Nevertheless, there is a possibility of moving the valve body 10 in the valve closing direction. Therefore, in the present embodiment, in order to solve such a problem, the hot water and the room temperature water are mixed on the downstream side of the main flow path 5 from the installation position of the shape memory spring 14. More specifically, in the present embodiment, a partition wall 15 is provided between the shape memory spring 14 inside the valve body 2 and the opening 7 so that the upper end is connected to the inner wall of the valve body 2 and is suspended from the connection position. The partition wall 15 forms a sub flow channel 16 of room temperature water parallel to the main flow channel 5 inside the valve body 2. Therefore, the section where the partition wall 15 is present is configured such that mixing of hot water and room temperature water is not performed, and mixing of hot water and room temperature water is performed on the downstream side of the partition wall 15. Therefore, the room temperature water flowing into the main flow path 5 through the opening 7 does not directly touch the shape memory spring 14, and the above-described problems are solved. The partition wall 15 is provided with a hole 15a through which the valve stem 8 is inserted, so that the opening / closing operation of the valve body 10 by the valve stem 8 is not hindered.

  As described above, the temperature adjusting valve 1 for drainage moves the valve element 10 in the valve opening direction by the reaction of the shape memory spring 14 provided in the main flow path 5 when the hot water discharged from the hot water storage tank or the like is at a predetermined temperature or higher. By allowing normal temperature water to flow through the opening 7, the hot water and the normal temperature water can be mixed and drained in a state where the temperature is lowered, reducing human danger and deformation of the drain pipe. Can do.

  Next, a second embodiment will be described. 6 and 7 are views showing a second embodiment of the temperature adjusting valve for drainage, and are provided in a drainage channel for draining hot water from a hot water storage tank or the like, for example, as in the first embodiment. FIG. 6A is a top view of the temperature adjusting valve 1a for drainage, and FIG. 6B is a longitudinal sectional view showing a state where the water supply unit is closed. FIG. 7 is a longitudinal sectional view of the drainage temperature adjustment valve 1a with the water supply section opened.

  The drainage temperature adjustment valve 1a includes a valve body 22 that allows hot water to pass therethrough. An upper portion of the valve body 22 is provided with an inflow portion 23 that is connected to a hot water storage tank or the like and into which drained hot water flows. Is provided with an outflow portion 24 through which hot water flows out to the drainage pipe on the downstream side. Inside the valve body 22, the inflow portion 23 and the outflow portion 24 are communicated with each other by a main flow path 25 through which hot water passes. A cylindrical water supply unit 26 is provided on the side of the valve body 22, and an opening 27 that communicates with the main flow path 25 is provided inside the water supply unit 26. A water supply pipe for supplying normal temperature water is connected to the water supply unit 26, and normal temperature water can be supplied to the main flow path 25 inside the valve body 22 through the opening 27.

  A step part 25a is provided in the inner surface of the main flow path 25 of the valve body 22 at substantially the center. The inner surface on the upstream side of the step part 25a is a small-diameter cylindrical surface 25b, and the inner surface on the downstream side is upstream. The cylindrical surface 25c has a larger diameter than the side. The opening 27 is formed in the large-diameter cylindrical surface 25c.

  The drain temperature control valve 1 a is provided with a valve body 30 that is movable in the vertical direction along the main flow path 25, and the opening 27 is opened and closed by the movement of the valve body 30. The valve body 30 has a reduced-diameter portion 30a that fits the small-diameter cylindrical surface 25b of the main flow path 25 in the upper portion and a wide-diameter portion 30b that fits the large-diameter cylindrical surface 25c of the main flow passage 25 in the lower portion. A concave groove 30c is formed in the circumferential direction of the valve body 30 between the reduced diameter portion 30a and the enlarged diameter portion 30b. Further, a through hole 30d penetrating vertically is formed in the axial center of the valve body 30, and hot water flowing in from the inflow portion 23 is guided to the downstream side of the valve body 30 through the through hole 30d. The concave groove 30c is formed with a plurality of holes 30e communicating with the through hole 30d, and normal temperature water is supplied from the periphery of the concave groove 30c to the inside of the through hole 30d through the hole 30e. Yes.

  Such a valve body 30 moves along the main flow path 25, but the valve body 30 is moved upwardly when the upper peripheral edge of the enlarged diameter portion 30 b of the valve body 30 hits the stepped portion 25 a of the main flow path 25. The movement is restricted, and the upper end position of the valve body 30 is defined. A pair of upper and lower O-rings 28a and 28b are provided in the circumferential direction of the cylindrical surface 25c across the opening 27. When the valve body 30 is at the upper end position, the valve body 30 and the O-rings 28a and 28b are connected to each other. They are joined together in a water-tight manner to prevent room temperature water from flowing through the opening 27. That is, in this embodiment, the state in which the valve body 30 is at the upper end position is the valve closed state.

  The outflow portion 24 is constituted by a disc-shaped receiving member 29 having an outflow hole 24a formed in the center, and the receiving member 29 is screwed to the inner surface of the lower end portion of the valve body 22. Between the receiving member 29 and the valve body 30, a biasing means 33 such as a spring for biasing the valve body 30 in the valve closing direction from the downstream side of the valve body 30 is provided. Therefore, the urging force of the urging means 33 acts on the valve body 30 and is urged in the valve closing direction. Although drainage pressure acts on the valve body 30 during drainage, the biasing means 33 can keep the valve body 30 in the closed position even when only drainage pressure acts on the valve body 30. The valve body 30 is pressed by the urging force.

  Further, an upper plate 34 having a plurality of inflow holes 34a is provided inside the inflow portion 23, and a coil spring is formed between the upper plate 34 and the valve body 30 with a shape memory alloy such as a NiTi alloy. The shape memory spring 35 is provided. As in the case described in the first embodiment, the shape memory spring 35 is in a contracted state below a predetermined temperature, and the shape memory alloy transforms back to the memory state above the predetermined temperature, and the spring extends in the extending direction. It is comprised so that it may deform | transform into. In the present embodiment, the predetermined temperature at which the shape memory spring 35 is deformed in the extending direction is set to a temperature lower than the temperature at which the hot water passing through the main flow path 5 may cause a danger such as a burn to the human body, or The heat resistance temperature of the drain pipe connected to the outflow portion 24 is set.

  When the temperature adjusting valve for drainage 1a having the above configuration is installed in the drainage channel, the shape memory spring 35 is in a contracted state when drainage is not performed, and as shown in FIG. Due to the urging force received from the valve body 30, the valve body 30 is positioned at the upper end of its movable range and the opening 27 is closed. Even when drainage is performed, if the temperature of the hot water is lower than a predetermined temperature at which the shape memory spring 35 is transformed, the shape memory spring 35 is still in a contracted state, and the valve as shown in FIG. The body 30 is in a state in which the opening 7 is closed by the biasing force received from the biasing means 33.

  In contrast, when hot water having a temperature higher than a predetermined temperature at which the shape memory spring 35 is transformed is drained, the shape memory spring 35 reacts with the hot water flowing through the main flow path 25 as shown in FIG. It deforms in the extending direction and presses the valve body 30 in the valve opening direction against the urging force of the urging means 13. When the upper end of the enlarged diameter portion 30b of the valve body 30 is pushed down below the opening 27, the opening 27 is opened, room temperature water flows around the concave groove 30c of the valve body 30, and further the concave groove 30c. It flows into the through hole 30d inside the valve body 30 through the plurality of holes 30e formed in the above. At this time, hot water and room temperature water are mixed to lower the temperature of the drainage. Then, when the drainage from the hot water storage tank stops and the shape memory spring 35 falls below the predetermined temperature, the shape memory spring 35 transforms again and returns to the original contracted state. Accordingly, the urging means 33 pushes up the valve body 30 to the upper end position again, and closes the opening 27. Accordingly, in the drainage temperature adjustment valve 1a of the present embodiment, the shape memory spring 35 provided in the main flow path 25 reacts with hot water at a predetermined temperature or more to deform in the extending direction and move the valve rod in the valve opening direction. The room temperature water flowing into the main flow path 25 through the opening 27 and hot water passing through the main flow path 25 can be mixed to lower the drainage temperature.

  In the temperature adjusting valve for drainage 1 a of this embodiment, mixing of hot water and normal temperature water is performed in the main flow path 25 on the downstream side of the shape memory spring 35. That is, the shape memory spring 35 is provided between the upper plate 34 on the upstream side of the opening 27 and the valve body 30, and mixing of hot water and room temperature water is performed on the opening 27 on the downstream side of the shape memory spring 35. This is performed inside the through-hole 30d corresponding to the formation position. Even when the valve body 30 opens the opening 27, the periphery of the reduced diameter portion 30a of the valve body 30 is joined to the O-ring 28c and is in a watertight state. Backflow is also prevented. Therefore, as described in the first embodiment, the room temperature water flowing into the main flow path 25 through the opening 27 does not directly touch the shape memory spring 35. Therefore, there is no problem that the shape memory spring 35 contracts and moves the valve body 30 in the valve closing direction even though the flowing hot water is at a predetermined temperature or higher.

  As described above, the temperature adjusting valve 1a for drainage moves the valve element 30 in the valve opening direction by the reaction of the shape memory spring 35 provided in the main flow path 25 if the hot water drained from the hot water storage tank or the like is above a predetermined temperature. By flowing normal temperature water through the opening 27, hot water and normal temperature water can be mixed and drained with the temperature lowered, reducing human danger and deformation of the downstream drain pipe. can do. Further, in the case of the temperature adjusting valve for drainage 1a of this embodiment, since the water pressure of room temperature water is not applied to the shape memory spring 35 as in the first embodiment, the valve body 30 is opened in the valve opening direction along with the transformation. There is also an advantage that the moving force can be reduced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the thing of the content mentioned above. If the above temperature control valve for drainage has a piping environment for draining hot water, it can be placed in the middle of the piping to lower the temperature of hot water passing through the main flow path. For example, hot water boiled in a water heater It can also be used as a hot and cold water mixing tap or the like that discharges by reducing the temperature to an appropriate temperature state.

It is a vertical section showing the closed state of the temperature control valve for drainage which is the first embodiment of the present invention. It is AA sectional drawing of FIG. It is a bottom view of the temperature control valve for drainage which is the first embodiment of the present invention. It is the right view seen from the water supply part side of the temperature control valve for drainage which is 1st embodiment of this invention. It is a longitudinal section showing the valve opening state of the temperature control valve for drainage which is the first embodiment of the present invention. It is a figure which shows the temperature control valve for waste_water | drain which is 2nd embodiment of this invention, (a) is the normal view, (b) is a longitudinally divided sectional view of a valve closing state. It is a longitudinal section showing the valve opening state of the temperature control valve for drainage which is the second embodiment of the present invention.

Explanation of symbols

1, 1a Drain temperature control valve 2, 22 Valve body 5, 25 Main flow path 7, 27 Opening 10, 30 Valve body 13, 33 Energizing means 14, 35 Shape memory spring 15 Bulkhead 16 Sub flow path

Claims (4)

A temperature regulating valve for drainage provided in a hot water drainage channel,
A valve body provided with a main channel for passing hot water and an opening for supplying room temperature water to the main channel;
A valve body for opening and closing the opening;
Urging means for urging the valve body in the valve closing direction;
A shape memory spring that is provided in the main flow path, returns to a storage state at a predetermined temperature or higher, and moves the valve body in a valve opening direction against a biasing force of the biasing means;
A temperature adjusting valve for drainage, wherein normal temperature water flowing into the main channel through the opening and hot water passing through the main channel are mixed and drained.   2. The temperature adjusting valve for drainage according to claim 1, wherein normal temperature water and hot water are mixed downstream from an installation position of the shape memory spring.   An upper end is connected to the inner wall of the valve body between the shape memory spring and the opening, and a partition wall suspended from the connection position is provided, and the main flow path is formed inside the valve body by the partition wall. The temperature adjusting valve for drainage according to claim 2, wherein a sub-flow path of room temperature water parallel to the wall is formed, and room temperature water and hot water are mixed on the downstream side of the partition wall.   The valve body is provided movably along the main flow path, opens and closes the opening, and has a through-hole through which hot water is allowed to pass through the shaft. The biasing means is provided downstream of the valve body. The drainage temperature regulating valve according to claim 1, wherein the valve body is urged in a valve closing direction from the side, and the shape memory spring is provided upstream of the valve body.

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