JP2017003054A - Fluid control valve and hot water heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily individually adjust, with respect to a bias spring and a temperature sensitive spring for responding to temperature to control fluid, respective spring loads on both springs when incorporating them.SOLUTION: A hot water control valve comprises a housing 22 including a flow channel 21, and a valve seat 23, a valve element 24, a temperature sensitive spring 25, a bias spring 26, an adjuster 27, and a holder 28 are incorporated in the housing 22. The temperature sensitive spring 25 biases the valve element 24 in a direction of bringing it close to the valve seat 23 and is made of a shape memory alloy which responds to temperature and expands. The bias spring 26 biases the valve element 24 in the opposite direction to the bias direction of the temperature sensitive spring 25. The adjuster 27 is provided for adjusting the full open position of the valve element 24. The holder 28 supports one end of the temperature sensitive spring 25. The respective components 24-28 are provided to be incorporable in the housing 22 through an entrance 22a, and the adjuster 27 and the holder 28 are provided to be adjustable of their positions in the housing 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fluid control valve that controls the flow of fluid in response to the temperature of the fluid. Specifically, the present invention relates to a fluid control valve configured to flow a fluid at a low temperature and to block a fluid flow at a normal temperature or a high temperature, and a hot water heating apparatus using the fluid control valve.

  Conventionally, as this type of technique, for example, a technique described in Patent Document 1 below is known. This technique is a hot water control valve used as a safety device for a hot water mixing tap, and a cross-sectional view thereof is shown in FIG. This hot water control valve includes a temperature sensing member (temperature sensing spring) 61 that senses the temperature of the mixed hot water and a valve body 63 that opens and closes the mixed hot water passage 62, and the temperature sensing spring 61 senses a temperature that is equal to or higher than a predetermined temperature. Then, the valve body 63 is configured to be closed by expanding (expanding). Specifically, the hot water control valve includes a tubular case (housing) 64, and a shaft-shaped valve body 63 is supported by a guide 65 at one end (outlet side) of the housing 64 so as to be movable. The The valve portion 63 a of the valve body 63 closes the mixed hot water passage 62 by contacting a seat surface (valve seat) 66 provided in the housing 64. A support plate 67 slidably provided at one end of the valve body 63 is slidably provided to the housing 64 at an intermediate portion in the housing 64. Between the guide 65 and the support plate 67, there is provided a return spring (bias spring) 68 that urges the valve body 63 in the direction opposite to the temperature-sensitive spring 61, and always urges the valve body 63 in the opening direction. It is supposed to be. A buffering spring 69 is provided between the valve body 63 and the support plate 67. On the other hand, a nipple 70 is provided at the other end (inlet side) of the housing 64. A temperature sensitive spring 61 is provided between the nipple 70 and the support plate 67. The temperature sensitive spring 61 is a shape memory alloy spring set so as to expand at a temperature equal to or higher than a predetermined temperature. When the temperature of the mixed hot water is lower than the predetermined temperature, the biasing force of the bias spring 68 overcomes the biasing force of the temperature-sensitive spring 61, and the valve body 63 operates (opens) in the opening direction. On the other hand, when the temperature of the mixed hot water is equal to or higher than a predetermined temperature, the temperature-sensitive spring 61 overcomes the biasing force of the bias spring 68 and expands, and the valve body 63 operates (closes) in the closing direction.

JP-A-60-245887

  However, in the hot water control valve described in Patent Document 1, it is considered that there is some variation in the elastic force (spring load) for each of the temperature-sensitive spring 61 and the bias spring 68. Therefore, due to the relationship between the spring loads of both springs 61 and 68, both springs 61 and 68 are assembled to the housing 64 in order to close the valve body 63 accurately when the mixed water reaches a predetermined temperature or higher. At that time, it is necessary to individually adjust each spring load. However, with this hot water control valve, the spring loads of both springs 61 and 68 could not be adjusted individually. For this reason, there existed a possibility that mixed hot water could not be controlled accurately. In addition, nothing has been studied about how to easily adjust the spring load.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a spring load of each of the two springs when assembling the parts with respect to a temperature-sensitive spring and a bias spring provided to control the fluid in response to temperature. It is an object of the present invention to provide a fluid control valve that can be individually adjusted easily. Another object of the present invention is to provide a hot water heating apparatus capable of accurately controlling the flow of hot water in addition to the above object.

  In order to achieve the above object, the invention according to claim 1 is configured to flow the fluid when the fluid is lower than a predetermined temperature and to block the flow of the fluid when the fluid is at a temperature higher than the predetermined temperature. A tubular housing that has a fluid flow path inside and opens at both ends, the housing includes an inlet opening at one end and an outlet opening at the other end; A valve body provided, a valve body movable in the housing and seatable on the valve seat, and a housing for energizing the valve body in a direction away from or close to the valve seat. A temperature-sensitive spring made of a shape memory alloy that contracts or expands in response to temperature, and is provided in the housing to urge the valve body in the direction opposite to the direction of urging by the temperature-sensitive spring. Bias spring And an adjuster provided in the housing for adjusting the fully open position where the valve body is farthest from the valve seat, and a holder provided in the housing for supporting one end of the bias spring or the temperature sensitive spring. The valve body, the temperature sensitive spring, the adjuster, the bias spring and the holder are provided so as to be assembled into the housing from the inlet, and the adjuster and the holder are provided in the housing so that the position can be adjusted. To do.

  According to the configuration of the present invention, the temperature-sensitive spring, the adjuster, the bias spring, and the holder are provided so as to be assembled into the housing from one inlet, so that these parts can be easily assembled. Moreover, since the adjuster and the holder are provided in the housing so that the position thereof can be adjusted, the fully open position of the valve body is adjusted, and the dimensions of the temperature-sensitive spring and the bias spring related to the valve body are adjusted.

  In order to achieve the above object, the invention described in claim 2 is the invention described in claim 1, wherein the temperature-sensitive spring is interposed between the valve body and the holder, and the bias spring is provided between the housing and the valve body. It is intended that the temperature sensing spring expands in response to a temperature equal to or higher than a predetermined temperature, and the valve body is seated on the valve seat to cut off the fluid flow.

  According to the configuration of the invention described above, in addition to the operation of the invention according to claim 1, by adjusting the position of the adjuster in the housing, the fully open position of the valve body is adjusted, and the bias spring of the valve body is adjusted. Dimension is adjusted. Further, by adjusting the position of the holder in the housing, the size of the temperature-sensitive spring related to the valve body is adjusted.

  In order to achieve the above object, according to a third aspect of the present invention, in the first aspect of the present invention, the temperature-sensitive spring is interposed between the housing and the valve body, and the bias spring is provided between the valve body and the holder. It is intended that the temperature sensing spring contracts in response to a temperature equal to or higher than a predetermined temperature, and the valve body is seated on the valve seat to interrupt the fluid flow.

  According to the configuration of the invention, in addition to the operation of the invention according to claim 1, by adjusting the position of the adjuster in the housing, the fully open position of the valve body is adjusted, and the temperature sensitive spring according to the valve body is adjusted. The size of the is adjusted. Further, by adjusting the position of the holder in the housing, the size of the bias spring related to the valve body is adjusted.

  In order to achieve the above object, according to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the adjuster and the holder each include a communication hole at the center, and the communication hole includes a valve body. The purpose is to serve both as an operation hole for pressing and a flow path.

  According to the configuration of the invention described above, in addition to the operation of the invention according to any one of claims 1 to 3, the adjuster and the holder each include a communication hole that also serves as a flow path at the center. Flow is secured. In addition, since the communication hole also serves as an operation hole for pressing the valve body, the position of the adjuster and the holder can be adjusted while the valve body is pressed through the communication hole.

  In order to achieve the above object, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the valve body moves relative to the valve seat at the tip of the valve body. The purpose of this is to provide a metering section for making the flow rate of the fluid variable and a guide section for guiding the valve body along the inner peripheral surface of the flow path.

  According to the configuration of the above invention, in addition to the action of the invention according to any one of claims 1 to 4, the valve body is moved by contraction or expansion of the temperature-sensitive spring, so that the valve seat at the measuring portion of the valve body. The flow rate of the fluid is adjusted between. Further, the movement of the valve body is stabilized by the guide portion.

  In order to achieve the above object, a sixth aspect of the present invention is the invention according to any one of the first to fifth aspects, wherein the valve body or the valve seat has a valve body when the valve body is seated on the valve seat. It is intended that a sealing member for sealing between the body and the valve seat is provided.

  According to the configuration of the above invention, in addition to the operation of the invention according to any one of claims 1 to 5, when the valve body is seated on the valve seat, the gap between the valve body and the valve seat is sealed by the seal member. .

  In order to achieve the above object, the invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the outlet side pipe for connecting the downstream pipe to the outlet side of the housing. A joint is provided, and an inlet side pipe joint for connecting the upstream side pipe is fixed to the inlet of the housing.

  According to the configuration of the above invention, in addition to the operation of the invention according to any one of claims 1 to 6, the inlet side pipe joint is fixed to the inlet of the housing so as to also serve as a lid for the inlet. An upstream pipe is connected to the inlet side pipe joint on the inlet side of the housing, and a downstream pipe is connected to the outlet side pipe joint on the outlet side of the housing. Thereby, the fluid control valve is arranged in the middle of the pipe.

  In order to achieve the above object, the invention according to claim 8 is configured to heat the accessory by flowing warm water heated by cooling the engine to the vicinity of the accessory through the hot water passage. In the hot water heating apparatus, the fluid control valve according to any one of claims 1 to 7 is provided in the hot water passage as a hot water control valve for controlling a flow of hot water.

  According to the configuration of the above invention, in the hot water passage, when the hot water is at a temperature lower than the predetermined temperature, the hot water control valve is opened and the hot water flows, and when the hot water is at a temperature equal to or higher than the predetermined temperature, the hot water control valve is closed. The flow is interrupted. For the hot water control valve, any one of claims 1 to 7 is obtained.

  According to the invention according to any one of claims 1 to 3, the temperature-sensitive spring and the bias spring provided for controlling the fluid in response to the temperature, the springs of the two springs when the parts including them are assembled. The load can be easily adjusted individually, and when the fluid reaches a predetermined temperature or higher, the fluid control valve can be operated with high accuracy to shut off the fluid flow.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, adjustment of the spring load of the temperature-sensitive spring and the bias spring can be easily performed without inhibiting the fluid flow. Can be

  According to the fifth aspect of the invention, in addition to the effect of the first aspect of the invention, the fluid flow rate can be controlled stably and accurately by the fluid control valve.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, when the valve body is disposed in the fully closed position, the gap between the valve body and the valve seat is The leakage of fluid can be suppressed.

  According to the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6, the number of parts of the fluid control valve can be reduced by the amount that the inlet side pipe joint also serves as a lid. Also, the fluid control valve can be easily incorporated into a predetermined device.

  According to the eighth aspect of the present invention, in the hot water heating apparatus, the hot water control valve can be operated accurately with respect to a predetermined temperature to control the flow of hot water, and the hot water can be accurately supplied with a relatively simple configuration. Can be controlled.

The top view which concerns on 1st Embodiment and shows schematically the front part of the vehicle which removed the bonnet. Sectional drawing which concerns on 1st Embodiment and expands and shows the warm water control valve of a valve opening state. Sectional drawing which shows the flow of warm water control valve and warm water of a valve opening state in connection with 1st Embodiment. Sectional drawing which concerns on 1st Embodiment and shows the warm water control valve of a valve closing state. The right view in FIGS. 2-4 which shows the base end surface of an adjuster concerning 1st Embodiment. The right view in FIGS. 2-4 which concerns on 1st Embodiment and shows the base end surface of a holder. Sectional drawing which concerns on 1st Embodiment and shows one step of the manufacturing process of a hot water control valve. Sectional drawing which concerns on 1st Embodiment and shows one step of the manufacturing process of a hot water control valve. Sectional drawing which shows the flow of warm water control valve and warm water of a valve opening state in connection with 2nd Embodiment. Sectional drawing which concerns on 2nd Embodiment and shows the hot water control valve of a valve closing state. Sectional drawing which concerns on 3rd Embodiment and expands and shows the warm water control valve of a valve opening state. Sectional drawing which concerns on a prior art example and shows a warm water control valve.

<First Embodiment>
Hereinafter, a fluid control valve and a hot water heating device according to a first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view schematically showing the front portion of a vehicle 1 with a bonnet removed. In the engine compartment (hereinafter referred to as “encopa”) 2, a radiator 3 is arranged at the front center thereof so that air taken in from the front of the vehicle 1 flows into the encoper 2 through the radiator 3. It has become. Behind the radiator 3, an engine 5 and an intake system and an exhaust system of the engine 5 are arranged. Here, the radiator 3 is provided with a cooling water passage (not shown) so that cooling water (warm water) warmed by cooling the engine 5 circulates for heat exchange. For this reason, when the engine 5 is cold-started, the coolant before being warmed by the engine 5 flows through the radiator 3. Thereafter, as the warm-up of the engine 5 progresses, the temperature of the cooling water rises, and in a state where the warm-up of the engine 5 is completed, hot hot water flows through the radiator 3.

  Headlights 4 are disposed on the left and right sides of the radiator 3. In the encoper 2, the engine 5 is disposed sideways. An intake manifold 6 for introducing air into a combustion chamber (not shown) is provided on the front side of the engine 5. An exhaust manifold 11 is provided on the rear side of the engine 5 for leading exhaust gas from the combustion chamber. A catalytic converter for exhaust purification and an exhaust pipe (not shown) are connected to the downstream side of the exhaust manifold 11. The exhaust manifold 11 and the like constitute an exhaust passage and an exhaust system.

  An intake pipe 8 is connected to the inlet side of the intake manifold 6 via a throttle device 7. An air cleaner 9 is provided at the tip of the intake pipe 8. The air cleaner 9 is provided with an intake inlet 9a. The intake manifold 6, the throttle device 7, the intake pipe 8 and the air cleaner 9 constitute an intake passage and an intake system. The intake passage introduces air (intake air) into the combustion chamber of the engine 5. The intake manifold 6 includes a surge tank 6a and a plurality of branch pipes 6b. The throttle device 7 includes a throttle valve 7a. The throttle device 7 is fixed to the right end of the surge tank 6a arranged sideways. The intake pipe 8 extends rightward from the throttle device 7 and is connected to an air cleaner 9.

  In this embodiment, the throttle device 7 corresponds to the accessory device of the present invention provided in association with the intake passage. A hot water passage 16 is provided between the engine 5 and the throttle device 7. In order to heat the throttle device 7, the hot water passage 16 is provided so that cooling water (warm water) warmed by cooling the engine 5 flows to the casing of the throttle device 7 and is circulated. The hot water passage 16 is provided to be branched from the cooling water passage. A non-electric hot water control valve 17 for controlling the flow of hot water is provided in the middle of the hot water passage 16. The warm water control valve 17 is configured to flow warm water when the temperature of the warm water, which is a fluid, is lower than a predetermined temperature, and to block the flow of warm water when the temperature of the warm water is equal to or higher than a predetermined temperature. Corresponds to a valve. The present invention is configured such that the hot water passage 16 and the hot water control valve 17 heat the throttle device 7 by flowing hot water heated by cooling the engine 5 to the vicinity of the throttle device 7 through the hot water passage 16. The hot water heating apparatus is configured.

  Next, the configuration of the hot water control valve 17 will be described in detail with reference to FIGS. FIG. 2 is an enlarged sectional view of the hot water control valve 17 in the valve open state. FIG. 3 is a sectional view showing the warm water control valve 17 and the flow of the warm water in the opened state. FIG. 4 is a sectional view showing the warm water control valve 17 in the closed state. The hot water control valve 17 includes a tubular housing 22 that has a flow path 21 of hot water, which is a fluid, and is open at both ends. The housing 22 includes an inlet 22a that opens at one end and an outlet 22b that opens at the other end. As will be described later, various components are incorporated into the housing 22 from the inlet 22a. A valve seat 23 is provided in the housing 22 on the side close to the outlet 22b. In the center of the valve seat 23, a valve hole 23a constituting the flow path 21 is formed. In the housing 22, a circumferential groove 22 c is formed around the valve seat 23. A female screw 22 d is formed on the inner periphery of the housing 22. The female screw 22d is formed in the housing 22 in such a range that the inlet 22a of the housing 22 is one end (open end) and the middle portion of the housing 22 is the other end (closed end).

  In the housing 22, a valve body 24, a temperature sensitive spring 25, a bias spring 26, an adjuster 27 and a holder 28 are provided. The valve body 24 is provided so as to be movable in the housing 22 and to be seated on the valve seat 23. The temperature-sensitive spring 25 is for urging the valve body 24 in a direction to approach the valve seat 23, and is made of a shape memory alloy that expands in response to temperature. The bias spring 26 is provided to bias the valve body 24 in the direction opposite to the biasing direction by the temperature-sensitive spring 25. The adjuster 27 is for adjusting the fully open position where the valve body 24 is farthest from the valve seat 23. The holder 28 is for supporting one end of the temperature-sensitive spring 25. In the hot water control valve 17, a bias spring 26, a valve body 24, an adjuster 27, a temperature sensitive spring 25 and a holder 28 are provided in this order so as to be assembled into the housing 22 from one inlet 22a, and An adjuster 27 and a holder 28 are provided in the housing 22 so that their positions can be adjusted.

  The valve body 24 has a long axis shape, and at its tip (left side in the figure), a metering section 24a that makes the flow rate of hot water variable by moving the valve body 24 relative to the valve seat 23, and a flow path 21 The guide part 24b which guides the valve body 24 along the inner peripheral surface is provided. The measuring portion 24a has a truncated cone shape that tapers toward the tip side. On the outer periphery of the measuring portion 24a, four ribs 24c for guiding the valve body 24 along the inner peripheral surface of the flow path 21 are formed at equal angular intervals, like the guide portion 24b. An intermediate flange 24 d that can contact the valve seat 23 is formed in the intermediate portion of the valve body 24. The intermediate flange 24d comes into contact with the valve seat 23, so that the valve body 24 is positioned at the fully closed position. A base end flange 24 e is formed on the outer periphery of the base end portion of the valve body 24. On the outer periphery of the base end flange 24e, four enlarged diameter portions 24f that partially enlarge the outer diameter of the flange 24e are formed at equal angular intervals. When the diameter-expanded portion 24f comes into contact with one end face of the adjuster 27, the valve body 24 is positioned at the fully opened position. A gap formed between adjacent enlarged diameter portions 24f also serves as a hot water flow path. Further, these gaps communicate with the communication hole 27 b of the adjuster 27 in a state where the enlarged diameter portion 24 f is in contact with one end surface of the adjuster 27. In the center of the base end of the valve body 24, a rod 24g extending in the direction of the inlet 22a of the housing 22 is formed. The rod 24g is used when assembling the valve body 24 and the like, as will be described later.

  The adjuster 27 and the holder 28 each have an annular shape, and male screws 27a and 28a are formed on the outer periphery thereof. By screwing these male screws 27a and 28a into the female screw 22d of the housing 22, each of the adjuster 27 and the holder 28 is assembled into the housing 22 from the inlet 22a, and the position is adjusted in the housing 22. It becomes possible. Further, the adjuster 27 and the holder 28 are provided with communication holes 27b and 28b at the centers, respectively. These communication holes 27b and 28b serve as a hot water flow path and an operation hole for pressing the valve body 24 as will be described later. FIG. 5 is a right side view of FIGS. 2 to 4 showing the base end surface 27c of the adjuster 27. FIG. In FIG. 6, the base end surface 28c of the holder 28 is shown by the right side view in FIGS. As shown in FIG. 5, four grooves 27d are formed on the base end surface 27c of the adjuster 27 at equal angular intervals so as to form a substantially cross shape with the communication hole 27b as the center. In order to rotate the adjuster 27, the tips of adjuster jigs 41 (see FIG. 7), which will be described later, are engaged with these grooves 27d. Similarly, as shown in FIG. 6, four grooves 28d are formed on the base end face 28c of the holder 28 at equal angular intervals so as to form a substantially cross shape with the communication hole 28b as a center. In order to rotate the holder 28, the tips of holder jigs 43 (see FIG. 8), which will be described later, are engaged with these grooves 28d.

  The bias spring 26 is interposed between the housing 22 and the valve body 24. One end of the bias spring 26 is fitted into the circumferential groove 22 c around the valve seat 23, and the other end abuts on the enlarged diameter portion 24 f of the base end flange 24 e of the valve body 24. The temperature sensitive spring 25 is interposed between the valve body 24 and the holder 28. One end of the temperature-sensitive spring 25 abuts on the base end surface 24 h of the valve body 24, and the other end abuts on the inner step portion 28 e of the holder 28. 2 and FIG. 3, as shown in FIG. 4, the temperature sensing spring 25 expands in response to a temperature equal to or higher than a predetermined temperature, so that the valve body 24 is seated on the valve seat 23 and is fully It is closed to block the flow of hot water.

  On the outlet 22 b side of the housing 22, an outlet side pipe joint 29 for connecting the downstream side pipe 18 constituting the hot water passage 16 is integrally provided. In addition, an inlet side pipe joint 30 for connecting the upstream side pipe 19 that also constitutes the hot water passage 16 is fixed to the side of the inlet 22 a of the housing 22. The inlet-side pipe joint 30 is formed separately from the housing 22, and is formed on the outer periphery of the lid portion 30a, the pipe portion 30b protruding in the axial direction from one end of the lid portion 30a, and the lid portion 30a. Flange portion 30c. On the other hand, a flange 22 e is also formed on the outer periphery of the proximal end of the housing 22. Then, the flange 22e of the housing 22 and the flange portion 30c of the inlet-side pipe joint 30 are face-to-face, and the inlet-side pipe joint 30 is welded to the housing 22 by laser welding the two parts 22e and 30c.

  The hot water control valve 17 described above can be configured with only seven parts, and it is not necessary to use expensive and precise parts such as a wax thermo element, and can be configured by combining simple parts. . The hot water control valve 17 is a component other than the temperature sensitive spring 25 and the bias spring 26 among the components, that is, the housing 22, the valve body 24, the adjuster 27, the holder 28, and the inlet side pipe joint 30. It can be made of resin for weight reduction, resulting in a relatively compact physique.

  Here, the assembly of parts relating to the manufacture of the hot water control valve 17 will be described. 7 and 8 are sectional views showing one stage of the manufacturing process of the hot water control valve 17, respectively. In order to assemble all the parts into the housing 22, first, the bias spring 26 and the valve body 24 are assembled in that order from the inlet 22 a into the housing 22. At this time, the rib 24c at the tip of the valve body 24 is assembled into the valve hole 23a. Further, one end of the bias spring 26 is fitted into the circumferential groove 22 c of the housing 22, and the other end is brought into contact with the enlarged diameter portion 24 f of the valve body 24.

  Next, the adjuster 27 is assembled to the housing 22. For this purpose, the adjuster 27 is aligned with the inlet 22 a of the housing 22, and the male screw 27 a of the adjuster 27 is screwed into the female screw 22 d of the housing 22. At this time, in order to rotate the adjuster 27, a substantially cylindrical adjuster jig 41 as shown in FIG. 7 is used. The jig 41 includes a cylindrical portion 41a inserted into the housing 22 and a flange portion 41b formed at the proximal end of the cylindrical portion 41a. The outer periphery of the flange portion 41b has a polygonal shape. Four protrusions that can be engaged with the four grooves 27d on the end face of the adjuster 27 are formed at the tip of the cylindrical portion 41a. By engaging these protrusions with the respective grooves 27d and rotating the jig 41, the adjuster 27 moves into the housing 22 while being screwed into the female screw 22d. As shown in FIG. 7, the adjuster 27 abuts against the base end surface 24 h of the valve body 24, and the valve body 24 is slightly pressed, so that the temperature-sensitive spring 25 is temporarily pushed in until a predetermined dimension is reached. Here, the “dimension” of the temperature sensitive spring 25 means the length in the axial direction of the temperature sensitive spring 25 sandwiched between the circumferential groove 22 c of the housing 22 and the enlarged diameter portion 24 f of the valve body 24. . At this time, the rod 24 g of the valve body 24 passes through the communication hole 27 b of the adjuster 27 and is inserted into the center hole 41 c of the jig 41. Then, the spring load is finely adjusted so that the spring load of the temperature-sensitive spring 25 becomes a predetermined value. For this purpose, a pressing rod 42 is inserted from the outside into the center hole 41 c of the jig 41, and the tip of the pressing rod 42 comes into contact with the tip of the rod 24 g of the valve body 24 to press the valve body 24. A spring load measuring device (not shown) is provided on the proximal end side of the pressing rod 42. When the valve body 24 is pressed by the pressing rod 42, the pressing load is measured by a measuring device. Then, in order to set the pressing load to a predetermined value, the adjuster 27 is rotated by the jig 41 to adjust the position. Thus, the spring load of the temperature-sensitive spring 25 can be finely adjusted to a predetermined set value. The adjuster 27 after the position adjustment can be fixed to the housing 22 with an adhesive or can be fixed by caulking the male screw 27a.

  Next, the temperature-sensitive spring 25 is incorporated into the housing 22 from the inlet 22a. At this time, the temperature-sensitive spring 25 is disposed in the communication hole 27 b of the adjuster 27 around the rod 24 g of the valve body 24, and one end thereof is brought into contact with the base end surface 24 h of the valve body 24.

  Next, the holder 28 is assembled to the housing 22. For this purpose, the holder 28 is aligned with the inlet 22 a of the housing 22, and the male screw 28 a of the holder 28 is screwed into the female screw 22 d of the housing 22. At this time, in order to rotate the holder 28, a substantially cylindrical holder jig 43 as shown in FIG. 8 is used. The jig 43 includes a cylindrical portion 43a and a flange portion 43b formed at the proximal end of the cylindrical portion 43a, and the outer periphery of the flange portion 43b has a polygonal shape. Four protrusions that can be engaged with the four grooves 28d on the end face of the holder 28 are formed at the tip of the cylindrical portion 43a. By engaging these protrusions with the respective grooves 28d and rotating the jig 43, the holder 28 moves into the housing 22 while being screwed into the female screw 22d. As shown in FIG. The other end of the temperature-sensitive spring 25 abuts on the step portion 28e. Then, by further moving the holder 28, the holder 28 is temporarily pushed in until the temperature-sensitive spring 25 reaches a predetermined size. Here, the “dimension” of the temperature-sensitive spring 25 means the length in the axial direction of the temperature-sensitive spring 25 sandwiched between the base end surface 24 h of the valve body 24 and the inner stepped portion 28 g of the holder 28. . At this time, the rod 24 g of the valve body 24 is inserted into the communication hole 28 b of the holder 28. Then, the spring load is finely adjusted so that the spring load of the temperature-sensitive spring 25 becomes a predetermined value. For this purpose, the pressing rod 42 is inserted into the center hole 43 c of the jig 43, and the tip of the pressing rod 42 comes into contact with the tip of the rod 24 g of the valve body 24 to press the valve body 24. Then, in order to set the pressing load to a predetermined value, the holder 28 is rotated by the jig 43 and the position is adjusted. Thus, the spring load of the temperature-sensitive spring 25 can be finely adjusted to a predetermined set value. As with the adjuster 27, the position-adjusted holder 28 can be fixed to the housing 22 with an adhesive or can be fixed by caulking the male screw 28a.

  Thereafter, the flange portion 30c of the inlet side pipe joint 30 is brought into contact with the flange 22e of the housing 22, and laser welding is performed, so that the inlet side pipe joint 30 is fixed to the housing 22 as shown in FIGS. The In this way, the manufacture of the hot water control valve 17 can be completed.

  According to the hot water control valve 17 of this embodiment described above, the hot water in the hot water passage 16 is opened when the temperature is lower than a predetermined temperature, and the hot water is allowed to flow, and is closed when the hot water is at a temperature higher than the predetermined temperature. Shut off warm water flow. Here, the bias spring 26, the adjuster 27, the temperature sensitive spring 25, and the holder 28 are provided so as to be assembled into the housing 22 from one inlet 22a having a relatively large opening, so that these components 25 to 28 can be easily assembled. It becomes. Moreover, since the adjuster 27 and the holder 28 are provided in the housing 22 so that the position thereof can be adjusted, the fully open position of the valve body 24 is adjusted, and the dimensions of the temperature-sensitive spring 25 and the bias spring 26 related to the valve body 24 are adjusted. Adjusted.

  More specifically, by adjusting the position of the adjuster 27 in the housing 22 through the inlet 22a, the fully open position of the valve body 24 is adjusted, and the size of the bias spring 26 associated with the valve body 24 is adjusted. The Further, by adjusting the position of the holder 28 in the housing 22 through the inlet 22a, the size of the temperature sensitive spring 25 associated with the valve body 24 is adjusted. For this reason, when the components 24 to 28 including the temperature-sensitive spring 25 and the bias spring 26 provided for controlling the hot water in response to the temperature are assembled, the spring loads of the springs 25 and 26 are easily and individually separated. Can be adjusted. Further, since the spring loads of the springs 25 and 26 can be individually adjusted easily, the hot water control valve 17 can be operated with high accuracy when the hot water reaches a predetermined temperature or higher so as to block the flow of the hot water. In this way, the hot water control valve 17 is obtained which is simple, compact and lightweight, does not use a wax thermoelement, is low in cost, has a small number of parts, and can easily adjust the dimensions of the temperature sensitive spring 25 and the bias spring 26 individually. be able to.

  In this embodiment, the adjuster 27 and the holder 28 each include communication holes 27 b and 28 b that also serve as a flow path at the center, so that the flow of hot water in the flow path 21 of the housing 22 is not blocked by the adjuster 27 and the holder 28. Secured. Further, since the communication holes 27b and 28b also serve as an operation hole for pressing the valve body 24 by the pressing rod 42, the adjuster 27 and the holder 28 are in a state of pressing the valve body 24 through the communication holes 27b and 28b. Position adjustment is possible. For this reason, adjustment of the spring load of the temperature-sensitive spring 25 and the bias spring 26 can be facilitated without inhibiting the flow of hot water.

  In this embodiment, the valve body 24 is moved by the expansion of the temperature-sensitive spring 25, whereby the hot water flow rate is adjusted between the valve seat 24 and the valve seat 23 by the measuring portion 24 a of the valve body 24. Further, the movement of the valve body 24 is stabilized by the guide portion 24b and the rib 24c. For this reason, the hot water flow rate can be controlled stably and accurately by the hot water control valve 17.

  In this embodiment, the inlet side pipe joint 30 is fixed to the inlet 22a of the housing 22 so as to also serve as a lid for the inlet 22a. Further, the upstream side pipe 19 is connected to the inlet side pipe joint 30 on the inlet 22 a side of the housing 22, and the downstream side pipe 18 is connected to the outlet side pipe joint 29 on the outlet 22 b side of the housing 22. Is done. As a result, the hot water control valve 17 is disposed in the middle of the pipes 18 and 19 constituting the hot water passage 16. For this reason, the number of parts of the hot water control valve 17 can be reduced by the amount that the inlet side pipe joint 30 also serves as a lid. Further, the hot water control valve 17 can be easily incorporated into a predetermined hot water heating apparatus.

  In this embodiment, in the hot water passage 16, when the hot water is at a temperature lower than a predetermined temperature, the hot water control valve 17 is opened and hot water flows, and when the hot water is at a temperature equal to or higher than the predetermined temperature, the hot water control valve 17 is closed and The flow is interrupted. For this reason, in the hot water heating apparatus, the hot water control valve 17 can be accurately operated with respect to a predetermined temperature to control the flow of hot water. That is, the hot water can be accurately controlled with a relatively simple configuration.

Second Embodiment
Next, a second embodiment in which the fluid control valve and the hot water heating device according to the present invention are embodied will be described in detail with reference to the drawings.

  In the following description, the same components as those in the first embodiment will be denoted by the same reference numerals, description thereof will be omitted, and different points will be mainly described.

  FIG. 9 is a sectional view showing the flow of the hot water control valve 17 and the hot water in the open state according to this embodiment. FIG. 10 is a sectional view showing the hot water control valve 17 in the closed state according to this embodiment. In this embodiment, as shown in FIGS. 9 and 10, in the vicinity of the intermediate flange 24 d of the valve body 24, there is a space between the valve body 24 and the valve seat 23 when the valve body 24 is seated on the valve seat 23. The configuration is different from that of the first embodiment in that a sealing member 31 for sealing is provided. As shown in FIGS. 9 and 10, the annular sealing member 31 is fitted in a circumferential groove 24 i formed in the valve body 24 adjacent to the intermediate flange 24 d, and a part thereof contacts the valve seat 23. Provided possible. The seal member 31 is made of an elastic material such as rubber.

  Therefore, according to this embodiment, as shown in FIG. 10, when the valve body 24 is seated on the valve seat 23, the gap between the valve body 24 and the valve seat 23 is sealed by the seal member 31. For this reason, when the valve body 24 is arrange | positioned in a fully-closed position, the leakage of warm water from between the valve body 24 and the valve seat 23 can be suppressed. Other functions and effects in this embodiment are the same as those in the first embodiment.

<Third Embodiment>
Next, a third embodiment in which the fluid control valve and the hot water heating device according to the present invention are embodied will be described in detail with reference to the drawings.

  FIG. 11 is an enlarged sectional view of the hot water control valve 17 in the valve open state. In each of the embodiments, the bias spring 26 is interposed between the housing 22 and the valve body 24, and the temperature-sensitive spring 25 is interposed between the valve body 24 and the holder 28. The temperature sensing spring 25 expands in response to a temperature equal to or higher than a predetermined temperature, so that the valve body 24 is seated on the valve seat 23 to block the flow of warm water. In contrast, in this embodiment, as shown in FIG. 11, the bias spring 26 is interposed between the valve body 24 and the holder 28, and the temperature sensitive spring 35 is interposed between the housing 22 and the valve body 24. . The temperature sensing spring 35 is contracted in response to a temperature equal to or higher than a predetermined temperature, so that the valve body 24 is seated on the valve seat 23 to block the flow of warm water. Although illustration is omitted here, one end of the temperature-sensitive spring 35 is fixed to the housing 22 and the other end is fixed to the valve body 24 in order to cause the temperature-sensitive spring 35 to function with respect to the valve body 24.

  According to this embodiment, by adjusting the position of the adjuster 27 in the housing 22, the fully open position of the valve body 24 is adjusted, and the size of the temperature-sensitive spring 35 associated with the valve body 24 is adjusted. Further, by adjusting the position of the holder 28 in the housing 22, the size of the bias spring 26 associated with the valve body 24 is adjusted. For this reason, when the components 26 to 28 and 35 including the temperature-sensitive spring 35 and the bias spring 26 provided for controlling the hot water in response to the temperature are assembled, the spring loads of the springs 35 and 26 can be easily applied. The warm water control valve 17 can be operated with high accuracy to shut off the flow of warm water when the warm water reaches a predetermined temperature or higher. Other functions and effects in this embodiment are the same as those in the first embodiment.

  Note that the present invention is not limited to the above-described embodiments, and a part of the configuration can be changed as appropriate without departing from the spirit of the invention.

  In each said embodiment, although the fluid control valve of this invention was actualized in the hot water control valve 17 which made the fluid warm water, liquid other than warm water may be sufficient as a fluid, or gas other than a liquid may be sufficient as it.

  In each of the above-described embodiments, the four ribs 24c for guiding the valve body 24 are formed at equal angular intervals, and the four enlarged diameter portions 24f of the flange 24e are formed at equal angular intervals. The interval between the diameter portions may not be equiangular.

  In each of the embodiments described above, the four grooves 27d are formed on the base end surface 27c of the adjuster 27 at equal angular intervals so as to form a substantially cross, and the four grooves 28d are formed on the base end surface 28c of the holder 28 so as to form a substantially cross. Although formed at angular intervals, these grooves need not be formed at equiangular intervals so as to form a substantially cross shape.

  The present invention can be used in a fluid control device that controls the flow of fluid in response to the temperature of the fluid.

16 Hot water passage 17 Hot water control valve (fluid control valve)
18 Downstream piping 19 Upstream piping 21 Flow path 22 Housing 22a Inlet 22b Outlet 22d Female thread 23 Valve seat 24 Valve body 24a Measuring section 24b Guide section 25 Temperature-sensitive spring 26 Bias spring 27 Adjuster 27a Male thread 27b Communication hole 27d Groove 28 Holder 28a Male thread 28b Communication hole 28d Groove 29 Outlet side pipe joint 30 Inlet side pipe joint 31 Seal member 35 Temperature sensitive spring 41 Adjuster jig 43 Holder jig

Claims (8)

A fluid control valve configured to flow the fluid when the fluid is lower than a predetermined temperature, and to block the flow of the fluid when the fluid is at a temperature equal to or higher than a predetermined temperature;
A tubular housing having the inside as a flow path for the fluid and open at both ends;
The housing includes an inlet opening at one end and an outlet opening at the other end;
A valve seat provided in the housing;
A valve body that is movable in the housing and seatable on the valve seat;
A temperature-sensitive spring made of a shape memory alloy provided in the housing for urging the valve body in a direction away from or close to the valve seat, and contracts or expands in response to temperature;
A bias spring provided in the housing for biasing the valve body in a direction opposite to the biasing direction by the temperature-sensitive spring;
An adjuster provided in the housing for adjusting a fully open position where the valve body is farthest from the valve seat;
A holder provided in the housing for supporting one end of the bias spring or the temperature-sensitive spring, wherein the valve body, the temperature-sensitive spring, the adjuster, the bias spring, and the holder are the inlet A fluid control valve, wherein the adjuster and the holder are provided so as to be adjustable in position in the housing.   The temperature-sensitive spring is interposed between the valve body and the holder, the bias spring is interposed between the housing and the valve body, and the temperature-sensitive spring is sensitive to a temperature equal to or higher than the predetermined temperature. 2. The fluid control valve according to claim 1, wherein the valve body is seated on the valve seat and shuts off the flow of the fluid when expanded.   The temperature-sensitive spring is interposed between the housing and the valve body, the bias spring is interposed between the valve body and the holder, and the temperature-sensitive spring is sensitive to a temperature equal to or higher than the predetermined temperature. The fluid control valve according to claim 1, wherein the valve body is seated on the valve seat and shuts off the flow of the fluid by contracting.   The adjuster and the holder each include a communication hole at the center, and the communication hole serves as both the operation hole for pressing the valve body and the flow path. The fluid control valve described.   The valve body is guided along the inner peripheral surface of the flow path at the distal end portion of the valve body, and a measuring portion that makes the flow rate of the fluid variable by moving the valve body relative to the valve seat. The fluid control valve according to any one of claims 1 to 4, further comprising a guide portion.   The valve body or the valve seat is provided with a seal member for sealing between the valve body and the valve seat when the valve body is seated on the valve seat. The fluid control valve according to any one of 1 to 5.   An outlet side pipe joint for connecting a downstream pipe is provided on the outlet side of the housing, and an inlet side pipe joint for connecting an upstream pipe is fixed to the inlet of the housing. The fluid control valve according to any one of claims 1 to 6, wherein: In the hot water heating apparatus configured to heat the accessory by flowing warm water heated by cooling the engine to the vicinity of the accessory via a warm water passage,
8. A hot water heating apparatus, wherein the fluid control valve according to claim 1 is provided in the hot water passage as a hot water control valve for controlling the flow of the hot water.

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