JP2019143755A - Thermal valve unit, heat source machine and method for manufacturing thermal valve unit - Google Patents

Abstract

To provide a thermal valve unit that is readily assembled, and to provide a heat source machine including the same and a method for manufacturing a thermal valve unit that allows for simple assembling.SOLUTION: A thermal valve unit 50 includes: a first housing H1; a second housing H2; a first seal member S1; a second seal member S2; a first thermal valve part V1; and a second thermal valve part V2. The first seal member S1 is positioned while being relatively offsite to a position of the second seal member S2 relative to a main flow passage FP in a second direction D2 orthogonal to a first direction D1.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a thermal valve unit, a heat source machine, and a method for manufacturing a thermal valve unit.

  A thermal valve unit is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-189653 (Patent Document 1). This thermal valve unit has a valve body, a plurality of nozzles, and a plurality of actuators. Hot water is supplied to the valve body. Each of the plurality of nozzles supplies hot water supplied into the valve body to an external device. Each of the plurality of actuators is provided in a portion corresponding to each of the plurality of nozzles in the valve body. Each actuator controls the amount of water supplied to each nozzle.

JP-A-8-189653

  In a thermally operated valve unit having a plurality of nozzles such as the thermally operated valve unit described in the above publication, normally, a seal member is installed at each of the plurality of nozzles connected to the valve body. Further, the plurality of nozzles may be integrated by being connected to each other. In this case, when a plurality of integrated nozzles are assembled to the valve body, a load is simultaneously applied to the plurality of seal members installed at the connection portion, so that it is difficult to assemble the thermal valve unit.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a thermal valve unit that can be easily assembled, a heat source device including the thermal valve unit, and a method for manufacturing the thermal valve unit that can be easily assembled. That is.

  The thermal valve unit of the present invention includes a first housing, a second housing, a first seal member, a second seal member, a first thermal valve portion, and a second thermal valve portion. ing. The first housing includes a main flow path, a first annular portion, and a second annular portion. The main channel extends in the first direction. The first annular portion has a first flow path communicating with the main flow path. The second annular portion has a second flow path communicating with the main flow path. The 2nd housing | casing contains the 1st cylindrical part and the 2nd cylindrical part. The first tubular portion has a first passage communicating with the first flow path. The second tubular portion has a second passage communicating with the second flow path and is formed integrally with the first tubular portion. The first seal member seals between the first annular portion and the first tubular portion. The second seal member seals between the second annular portion and the second tubular portion. The first thermal valve portion and the second thermal valve portion are accommodated in the first housing and the second housing. The first thermal valve unit is configured to be able to open and close the first passage. The second thermal valve unit is configured to be able to open and close the second passage. In the second direction orthogonal to the first direction, the position of the first seal member is displaced relative to the position of the second seal member with respect to the main flow path.

  According to the thermal valve unit of the present invention, in the second direction, the position of the first seal member is shifted relative to the position of the second seal member with respect to the main flow path. For this reason, the timing at which the load is applied to the first seal member and the timing at which the load is applied to the second seal member can be shifted. Therefore, the load applied simultaneously to the first seal member and the second seal member can be reduced. This facilitates assembly of the thermal valve unit.

  In the thermal valve unit, the first flow path includes a first opening into which the first cylindrical portion is inserted. The second flow path includes a second opening into which the second cylindrical portion is inserted. In the second direction, the first opening and the second opening are disposed at the same position with respect to the main channel. In the second direction, the distance from the first opening to the first seal member is greater than the distance from the second opening to the second seal member. For this reason, the position of the first seal member is closer to the main flow path than the position of the second seal member in the second direction. In this way, the position of the first seal member in the second direction can be shifted relative to the position of the second seal member with respect to the main flow path.

  In the above-described thermal valve unit, the first seal member is disposed so as not to overlap the second seal member in the second direction. For this reason, the timing at which a load is applied to each of the first seal member and the second seal member can be reliably shifted.

  In the above-described thermal valve unit, each of the first seal member and the second seal member is an O-ring. Since the O-ring is highly versatile, the cost is low. For this reason, the cost of a thermally operated valve unit can be reduced.

  In the above-described thermal valve unit, the first housing includes a third annular portion. The third annular portion has a third flow path communicating with the main flow path. The 2nd housing | casing contains the 3rd cylindrical part. The third tubular portion has a third passage communicating with the third flow path and is integrally formed with the first tubular portion and the second tubular portion. The thermal valve unit further includes a third seal member that seals between the third annular portion and the third cylindrical portion, and a third thermal valve portion that is housed in the first housing and the second housing. I have. The third thermal valve unit is configured to be able to open and close the third passage. The first seal member is disposed closer to the main flow path in the second direction than the second seal member, and the second seal member is disposed closer to the main flow path in the second direction than the third seal member. Therefore, when the first seal member, the second seal member, and the third seal member are viewed from the third seal member side in the direction in which the first seal member, the second seal member, and the third seal member are aligned with each other during assembly. Furthermore, it is easy to visually recognize the first seal member, the second seal member, and the third seal member. Therefore, the visibility of the first seal member, the second seal member, and the third seal member can be improved. This facilitates assembly of the thermal valve unit.

  The heat source apparatus of the present invention includes a pipe and a thermal valve unit arranged on the path of the pipe. For this reason, the heat source machine provided with the heat valve unit which becomes easy to assemble can be provided.

  In the method for manufacturing a thermal valve unit of the present invention, a first housing is prepared. The first housing includes a main channel, a first annular part having a first channel communicating with the main channel, and a second annular part having a second channel communicating with the main channel. A second housing is prepared. The second housing has a first cylindrical part having a first passage communicating with the first flow path and a second communication part communicating with the second flow path, and is molded integrally with the first cylindrical part. And a second cylindrical portion. After the first annular portion and the first tubular portion are sealed by the first seal member in a state where the first passage and the first passage are communicated, the second passage and the second passage are communicated. In this state, the space between the second annular portion and the second tubular portion is sealed by the second seal member.

  According to the manufacturing method of the thermal valve unit of the present invention, after the space between the first annular portion and the first tubular portion is sealed by the first seal member, the second annular portion and the second tubular portion The space is sealed by the second seal member. For this reason, the timing at which the load is applied to the first seal member and the timing at which the load is applied to the second seal member can be shifted. Therefore, the load applied simultaneously to the first seal member and the second seal member can be reduced. This facilitates assembly of the thermal valve unit.

  As described above, according to the present invention, it is possible to provide a thermal valve unit that can be easily assembled, a heat source apparatus including the thermal valve unit, and a method for manufacturing the thermal valve unit that can be easily assembled.

It is a perspective view which shows the structure of the thermal valve unit in one embodiment of this invention. It is a disassembled perspective view which shows the structure of the thermally operated valve unit in one embodiment of this invention. It is sectional drawing which follows the III-III line of FIG. It is an enlarged view of the P1 part of FIG. It is sectional drawing in the position where the load concerning a 1st sealing member becomes a peak in the manufacturing method of the thermal valve unit in one embodiment of this invention. It is sectional drawing in the position where the load concerning a 2nd sealing member becomes a peak in the manufacturing method of the thermal valve unit in one embodiment of this invention. It is sectional drawing in the position where the load concerning a 3rd seal member becomes a peak in the manufacturing method of the thermal valve unit in one embodiment of this invention. It is sectional drawing which shows the structure of the thermal valve unit of a comparative example. It is an enlarged view of the part corresponding to P2 part of FIG. 8, and is a figure in the position where the load concerning a 1st seal member, a 2nd seal member, and a 3rd seal member becomes a peak. It is a figure which shows the relationship between the load concerning the thermal valve unit in one embodiment of this invention, and the thermal valve unit of a comparative example, and time. It is sectional drawing which shows arrangement | positioning of the 1st seal member of the thermal valve unit in a modification of one embodiment of this invention, a 2nd seal member, and a 3rd seal member. It is a figure which shows the structure of the heat-source equipment in one embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description will not be repeated.

(Configuration of thermal valve unit in the embodiment)
With reference to FIGS. 1-4, the structure of the thermal valve unit in one embodiment of this invention is demonstrated.

  As shown in FIG. 1, the thermal valve unit 50 of the present embodiment is configured such that a plurality of thermal valves 50A are joined together. The thermal valve unit 50 of the present embodiment is configured by three thermal valves 50A as an example, but may be configured by two thermal valves 50A, and four or more thermal valves 50A. You may be comprised from.

  Each of the plurality of thermally operated valves 50 </ b> A has a valve housing 1 and a lid 41. The valve housing 1 has a first water passage 1a and a second water passage 1b. The 1st water flow part 1a is a water intake part, for example, and the 2nd water flow part 1b is a water discharge part, for example.

  As shown in FIG. 2, the valve housings 1 of the plurality of thermal valves 50 </ b> A are integrally formed and are joined to each other. Each valve housing 1 of the plurality of thermal valves 50A shares the first water flow portion 1a. The plurality of thermal valves 50A have a plurality of second water passage portions 1b. The 2nd water flow part 1b is provided for every 50 A of thermal valves.

  Each of the lids 41 of the plurality of thermal valves 50A is integrally formed by the connecting portion 43 and joined to each other. The lid 41 is fixedly attached to the valve housing 1. Specifically, a fixing member such as a bolt 45 is inserted through the through hole of the lid 41 and then screwed into a screw hole of the valve housing 1 so that the lid 41 is attached and fixed to the valve housing 1. .

  As shown in FIG. 3, one thermal valve 50 </ b> A includes a valve housing 1, a valve main body 11, a drive unit 21, a seal member 31, an insulating retainer 25, an insulating spacer 26, and a first elasticity. A member 27 and a lid 41 are provided.

  The valve housing 1 includes a housing body 1k and a drive unit housing 1e. The housing main body 1k and the drive unit housing 1e are integrally molded and are joined to each other. The housing body 1k includes a first water passage 1a (FIGS. 1 and 2), a second water passage 1b, an internal flow path 1c, and a shaft insertion hole 1d.

  The internal flow path 1c is provided between the 1st water flow part 1a and the 2nd water flow part 1b. For this reason, the heat transfer fluid supplied to the 1st water flow part 1a is discharged | emitted from the 2nd water flow part 1b through the internal flow path 1c, for example. The internal flow path 1c is shared by a plurality of thermal valves 50A.

  The shaft insertion hole 1 d is provided inside the valve housing 1. The shaft insertion hole 1d communicates with the internal flow path 1c.

  The drive unit housing 1e of the valve housing 1 has a cylindrical shape. The drive unit housing 1e has a first end 1e1 and a second end 1e2 which is an end opposite to the first end 1e1. The drive unit housing 1e is connected to the housing body 1k at the second end 1e2.

  The drive unit housing 1e is disposed on the opposite side of the internal flow path 1c with respect to the shaft insertion hole 1d. The internal space 1f of the drive unit housing 1e communicates with the shaft insertion hole 1d.

  The valve main body 11 includes a valve body 12, a valve shaft 13, and a second elastic member 14. The valve body 12 can open and close the internal flow path 1c. Specifically, the internal flow path 1c is closed by the valve body 12 in a state where the valve body 12 is in contact with the valve seat 1g. Further, the internal flow path 1c is opened by the valve body 12 in a state in which the valve body 12 is separated from the valve seat 1g.

  The valve shaft 13 is inserted into the shaft insertion hole 1d so as to penetrate the shaft insertion hole 1d. One end of the valve shaft 13 is connected to the valve body 12, and the other end is located in the internal space 1f of the drive unit housing 1e. The second elastic member 14 urges the valve body 12 in a direction to close the internal flow path 1c (a direction in which the valve body 12 faces the valve seat 1g). The second elastic member 14 is, for example, a coil spring.

  The drive unit 21 is disposed in the internal space 1f of the drive unit housing 1e. The drive unit 21 includes a heater 22, a first electrode member 23a, a second electrode member 23b, and a thermally responsive element 24. Each of the heater 22, the first electrode member 23a, and the second electrode member 23b is disposed on the first end 1e1 side with respect to the thermally responsive element 24.

  Each of the first electrode member 23 a and the second electrode member 23 b is electrically connected to the heater 22. The first electrode member 23 a is disposed on the second end 1 e 2 side of the heater 22, and the second electrode member 23 b is disposed on the first end 1 e 1 side of the heater 22. The heater 22 is sandwiched between the first electrode member 23a and the second electrode member 23b.

  The heater 22 can be energized by the first electrode member 23a and the second electrode member 23b. The heater 22 generates heat when energized. The heater 22 heats the thermally responsive element 24 by generating heat. The heater 22 is, for example, a PTC (Positive Thermal Coefficient) thermistor (positive characteristic thermistor).

  The thermally responsive element 24 is disposed between the heater 22 and the valve shaft 13. The thermally responsive element 24 can move the valve shaft 13 in the axial direction by being heated by the heater 22.

  The thermally responsive element 24 is, for example, a wax element. The thermoresponsive element 24 includes a heat sensitive part 24a and a shaft body 24b. The heat sensitive part 24a has a configuration filled with wax. The wax filled in the heat sensitive part 24a is, for example, paraffin wax. The shaft body 24b has one end inserted into the heat sensitive part 24a and the other end protruding from the heat sensitive part 24a.

  The wax in the heat sensitive part 24 a expands when heated by the heater 22. As the wax expands, the shaft body 24b is pushed out of the heat sensitive portion 24a. Further, the wax of the heat sensitive part 24a contracts when cooled from the heated state. As the wax contracts, the shaft body 24b moves to the inside of the heat sensitive portion 24a.

  The seal member 31 has a function of sealing between the valve shaft 13 and the wall surface of the shaft insertion hole 1d (a function of sealing between the valve shaft 13 and the wall surface of the shaft insertion hole 1d in a watertight manner). The seal member 31 is disposed between the drive unit 21 and the internal flow path 1c. The seal member 31 prevents the heat transfer fluid in the internal flow path 1c from entering the internal space 1f of the drive unit housing 1e through the shaft insertion hole 1d.

  The seal member 31 has, for example, two O rings 32 and 33. Each of the O-rings 32 and 33 has an annular shape. The inner peripheral portions of the O-rings 32 and 33 are in contact with the outer peripheral surface of the valve shaft 13, and the outer peripheral portions of the O-rings 32 and 33 are in contact with the wall surface of the shaft insertion hole 1d.

  The insulating retainer 25 is disposed in the internal space 1f of the drive unit housing 1e. The insulating retainer 25 is disposed between the drive unit 21 and the seal member 31. The insulating retainer 25 is made of an insulating material.

  The insulating retainer 25 has a bottomed cylindrical shape. The insulating retainer 25 has a cylindrical portion 25a, a bottom portion 25b, and a flange portion 25c. The cylindrical part 25a has a cylindrical shape. The bottom portion 25b is provided at the bottom of the cylindrical portion 25a. The bottom portion 25b has an annular shape having a through hole. The valve shaft 13 is inserted through the through hole of the bottom portion 25b. The flange portion 25c protrudes from the outer peripheral surface of the cylindrical portion 25a to the outer peripheral side. The flange portion 25c has a circular tube shape.

  The insulating spacer 26 has, for example, a columnar shape. The insulating spacer 26 is disposed between the shaft body 24 b of the thermally responsive element 24 and the valve shaft 13 of the valve body 11. The insulating spacer 26 is disposed inside the cylindrical portion 25 a of the insulating retainer 25. The insulating spacer 26 is made of an insulating material.

  The first elastic member 27 is disposed between the flange portion 25 c of the insulating retainer 25 and the thermally responsive element 24. The first elastic member 27 is, for example, a coil spring.

  The first elastic member 27 presses the thermally responsive element 24 toward the heater 22 side. Specifically, the first elastic member 27 presses the thermally responsive element 24 against the first electrode member 23a. Thereby, the thermally responsive element 24 can efficiently receive the heat generated from the heater 22.

  The first elastic member 27 urges the insulating retainer 25 toward the seal member 31 with respect to the drive unit 21. Accordingly, the first elastic member 27 presses the flange portion 25c of the insulating retainer 25 against the valve housing 1 with the seal member 31 side facing.

  The lid 41 is attached to the valve housing 1 by a fixing member such as a bolt 45 (FIGS. 1 and 2), for example. The lid 41 is disposed so as to surround the outer peripheral surface of the drive unit housing 1e and the first end 1e1. The lid 41 has a protruding portion 42 protruding inside. The protrusion 42 extends from the first end 1e1 side into the internal space 1f of the drive unit housing 1e.

  The plurality of lids 41 are integrally formed by the connection portion 43 as described above and are connected to each other. The connection portion 43 is attached to the lower ends of the plurality of lids 41. A plurality of (for example, three) drip-proof covers 44 are formed integrally with the connection portion 43 in the connection portion 43. Each of the plurality of drip-proof covers 44 extends to the side opposite to the lid 41 with respect to the connection portion 43.

  As shown in FIGS. 2 and 3, the thermal valve unit 50 according to the present embodiment includes three thermal valves 50A including a first thermal valve 50A1, a second thermal valve 50A2, and a third thermal valve 50A3. It is composed of The valve housing 1 and the lid 41 of each of the first thermal valve 50A1, the second thermal valve 50A2, and the third thermal valve 50A3 integrally form a housing part HP.

  The thermal valve unit 50 includes a housing part HP, a first seal member S1, a second seal member S2, a third seal member S3, a first thermal valve part V1, and a second thermal valve part V2. And a third thermal valve portion V3.

  The casing unit HP includes a first casing H1 and a second casing H2. The first housing H1 and the second housing H2 are assembled with each other. The second housing H2 is attached to the first housing H1 by a fixing member such as a bolt 46, for example. The housing | casing part HP has the internal flow path 1c. The internal channel 1c includes a main channel FP, a first channel F1, a second channel F2, a third channel F3, a first channel W1, a second channel W2, and a third channel W3. Have. The main flow path FP extends in the first direction D1. The main flow path FP communicates with each of the first flow path F1, the second flow path F2, and the third flow path F3 in the second direction D2 orthogonal to the first direction D1. Each of the first flow path F1, the second flow path F2, and the third flow path F3 is disposed on the side opposite to the lid 41 with respect to the main flow path FP in the second direction D2. The first passage W1 communicates with the first flow path F1 in the second direction D2. The second passage W2 communicates with the first flow path F2 in the second direction D2. The third passage W3 communicates with the third flow path F3 in the second direction D2.

  The first housing H1 includes a part of the housing body 1k and a lid 41 of each of the first thermal valve 50A1, the second thermal valve 50A2, and the third thermal valve 50A3. The first housing H1 has a main flow path FP. The first housing H1 includes a first annular portion C1, a second annular portion C2, and a third annular portion C3 in a portion connected to the second housing H2. Each of the first annular portion C1, the second annular portion C2, and the third annular portion C3 has an annular shape.

  The first thermal valve 50A1 has a first annular portion C1. The first annular portion C1 has a first flow path F1 that communicates with the main flow path FP. The 1st flow path F1 has 1st opening OP1 opened to the 2nd water flow part 1b side.

  The second thermal valve 50A2 has a second annular portion C2. The second annular portion C2 has a second flow path F2 that communicates with the main flow path FP. The 2nd flow path F2 has 2nd opening OP2 opened to the 2nd water flow part 1b side. The second annular portion C2 is disposed on the same side as the first annular portion C1 with respect to the main flow path FP in the second direction D2.

  The third thermal valve 50A3 has a third annular portion C3. The 3rd flow path F3 has 3rd opening OP3 opened to the 2nd water flow part 1b side. The third annular portion C3 has a third flow path F3 that communicates with the main flow path FP. The third annular portion C3 is disposed on the same side as the first annular portion C1 and the second annular portion C2 with respect to the main flow path FP in the second direction D2.

  The second housing H2 has a part of the housing body 1k of each of the first thermal valve 50A1, the second thermal valve 50A2, and the third thermal valve 50A3. The second housing H2 includes a first tubular portion T1, a second tubular portion T2, and a third tubular portion T3 at a portion connected to the first housing H1. The first tubular portion T1, the second tubular portion T2, and the third tubular portion T3 are integrally formed and are joined to each other. Each of the first tubular portion T1, the second tubular portion T2, and the third tubular portion T3 has a tubular shape.

  As shown in FIG. 4, the first thermal valve 50A1 has a first tubular portion T1. The first tubular portion T1 has a first passage W1 that communicates with the first flow path F1. The first tubular portion T1 has a first main body portion T11 and a first protruding portion T12. The first protruding portion T12 protrudes from the first main body portion T11 to the side opposite to the second water passage portion 1b. The inner diameter of the first main body T11 is the same as the inner diameter of the first protrusion T12. The outer diameter of the first main body T11 is larger than the outer diameter of the first protrusion T12. The first main body portion T11 has an annular first locking portion L1 between the outer peripheral surface of the first main body portion T11 and the outer peripheral surface of the first protruding portion T12. The first seal member S1 is locked to the first locking portion L1.

  The second thermal valve 50A2 has a second cylindrical portion T2. The second tubular portion T2 has a second passage W2 that communicates with the second flow path F2. The second tubular portion T2 is formed integrally with the first tubular portion T1. The second tubular portion T2 has a second main body portion T21 and a second protruding portion T22. The second protruding portion T22 protrudes from the second main body portion T21 to the opposite side to the second water passage portion 1b. The inner diameter of the second main body T21 is the same as the inner diameter of the second protrusion T22. The outer diameter of the second main body T21 is larger than the outer diameter of the second protrusion T22. The second main body portion T21 has an annular second locking portion L2 between the outer peripheral surface of the second main body portion T21 and the outer peripheral surface of the second projecting portion T22. The second seal member S2 is locked to the second locking portion L2.

  The third thermal valve 50A3 has a third cylindrical portion T3. The third tubular portion T3 has a third passage W3 that communicates with the third flow path F3. The third tubular portion T3 is formed integrally with the first tubular portion T1 and the second tubular portion T2. The third cylindrical portion T3 has a third main body portion T31 and a third protruding portion T32. The third protruding portion T32 protrudes from the third main body portion T31 to the side opposite to the second water passing portion 1b. The inner diameter of the third main body T31 is the same as the inner diameter of the third protrusion T32. The outer diameter of the third main body T31 is larger than the outer diameter of the third protrusion T32. The third main body T31 has an annular third locking portion L3 between the outer peripheral surface of the third main body T31 and the outer peripheral surface of the third protrusion T32. The third seal member S3 is locked to the third locking portion L3.

  Each of the first seal member S1, the second seal member S2, and the third seal member S3 is accommodated in the first housing H1 and the second housing H2. The first thermal valve 50A1 has a first seal member S1. The first seal member S1 has a function of sealing between the first annular portion C1 and the first tubular portion T1. The first seal member S1 is disposed between the first annular portion C1 and the first tubular portion T1. The first seal member S1 prevents the heat transfer fluid in the first flow path F1 from flowing out of the first thermal valve 50A1 through the first opening OP1.

  The second thermal valve 50A2 has a second seal member S2. The second seal member S2 has a function of sealing between the second annular portion C2 and the second tubular portion T2. The second seal member S2 is disposed between the second annular portion C2 and the second tubular portion T2. The second seal member S2 prevents the heat transfer fluid in the second flow path F2 from flowing out of the second thermal valve 50A2 through the second opening OP2.

  The third thermal valve 50A3 has a third seal member S3. The third seal member S3 has a function of sealing between the third annular portion C3 and the third tubular portion T3. The third seal member S3 is disposed between the third annular portion C3 and the third tubular portion T3. The third seal member S3 prevents the heat transfer fluid in the third flow path F3 from flowing out of the third thermal valve 50A3 through the third opening OP3.

  Each of the first seal member S1, the second seal member S2, and the third seal member S3 is an O-ring. Each of the first seal member S1, the second seal member S2, and the third seal member S3 has an annular shape. Each of the first seal member S1, the second seal member S2, and the third seal member S3 has two circular cross sections in the cross section along each radial direction.

  The outer peripheral portion of the first seal member S1 is in contact with the inner peripheral surface of the first annular portion C1, and the inner peripheral portion of the first seal member S1 is in contact with the outer peripheral surface of the first tubular portion T1. The outer peripheral portion of the second seal member S2 is in contact with the inner peripheral surface of the second annular portion C2, and the inner peripheral portion of the second seal member S2 is in contact with the outer peripheral surface of the second tubular portion T2. The outer peripheral portion of the third seal member S3 is in contact with the inner peripheral surface of the third annular portion C3, and the inner peripheral portion of the third seal member S3 is in contact with the outer peripheral surface of the third tubular portion T3.

  As shown in FIGS. 3 and 4, each of the first thermal valve portion V1, the second thermal valve portion V2, and the third thermal valve portion V3 is connected to the first housing H1 and the second housing H2. Contained. The first thermal valve 50A1 has a first thermal valve portion V1. The first thermal valve portion V1 is configured to be able to open and close the first passage W1. The second thermal valve 50A2 has a second thermal valve part V2. The second thermal valve portion V2 is configured to be able to open and close the second passage W2. The third thermal valve 50A3 has a third thermal valve part V3. The third thermal valve portion V3 is configured to be able to open and close the third passage W3.

  Each of the first thermal valve unit V1, the second thermal valve unit V2, and the third thermal valve unit V3 includes the first thermal valve 50A1, the second thermal valve 50A2, and the third thermal valve 50A3. It is an operating part. Each of the first thermal valve unit V1, the second thermal valve unit V2, and the third thermal valve unit V3 includes a valve body 11, a drive unit 21, a seal member 31, an insulating retainer 25, and an insulating spacer 26. And a first elastic member 27.

  In the present embodiment, the first tubular portion T1 of the second housing H2 is inserted from the first opening OP1 into the first annular portion C1 of the first housing H1. The first tubular portion T1 is inserted in the second direction D2 into the first annular portion C1. The second tubular portion T2 of the second housing H2 is inserted into the second annular portion C2 of the first housing H1 through the second opening OP2. The second tubular portion T2 is inserted in the second annular portion C2 in the second direction D2. The third tubular portion T3 of the second housing H2 is inserted into the third annular portion C3 of the first housing H1 through the third opening OP3. A third tubular portion T3 is inserted in the second direction D2 into the third annular portion C3.

  In the second direction D2 orthogonal to the first direction D1, the position of the first seal member S1 is shifted relative to the position of the second seal member S2 with respect to the main flow path FP. Further, in the second direction D2, the position of the second seal member S2 is shifted relative to the position of the third seal member S3 with respect to the main flow path FP.

  In the above description, the first tubular portion T1 is inserted into the first annular portion C1, the second tubular portion T2 is inserted into the second annular portion C2, and the third tubular portion T3 is inserted into the third annular portion C3. Has been inserted. That is, the first tubular portion T1 is fitted into the first annular portion C1, the second tubular portion T2 is fitted into the second annular portion C2, and the third tubular portion T3 is fitted into the third annular portion C3. It is fitted. However, the first annular portion C1 is inserted into the first tubular portion T1, the second annular portion C2 is inserted into the second tubular portion T2, and the third annular portion C3 is inserted into the third tubular portion T3. May be. That is, the first tubular portion T1 is fitted on the first annular portion C1, the second tubular portion T2 is fitted on the second annular portion C2, and the third tubular portion T3 is fitted on the third annular portion C3. It may be fitted.

  Therefore, in the present embodiment, either one of the first annular portion C1 and the first tubular portion T1 may be inserted. Moreover, what is necessary is just to insert any other in any one of 2nd cyclic | annular part C2 and 2nd cylindrical part T2. Moreover, the other should just be inserted in any one of 3rd cyclic | annular part C3 and 3rd cylindrical part T3.

  In the second direction D2, each of the first opening OP1, the second opening OP2, and the third opening OP3 is disposed at the same position with respect to the main flow path FP. In the second direction D2, the distance DS1 from the first opening OP1 to the first seal member S1 is larger than the distance DS2 from the second opening OP2 to the second seal member S2. In the second direction D2, the distance DS2 from the second opening OP2 to the second seal member S2 is greater than the distance DS3 from the third opening OP3 to the third seal member S3.

  The first seal member S1 is disposed closer to the main flow path FP in the second direction D2 than the second seal member S2, and the second seal member S2 is located in the main flow path FP in the second direction D2 than the first seal member S1. Located nearby. As described above, the first seal member S1, the second seal member S2, and the third seal member S3 are, in the second direction D2, the first seal member S1, the second seal member S2, and the third seal with respect to the main flow path FP. It arrange | positions so that the order of member S3 may approach. That is, the first seal member S1, the second seal member S2, and the third seal member S3 are arranged stepwise in the second direction D2.

(Operation of the thermal valve in the embodiment)
Next, the operation of the thermal valve 50A in the present embodiment will be described with reference to FIG.

  As shown in FIG. 3, when the thermally responsive element 24 is not heated by the heater 22, the valve body 12 is urged by the second elastic member 14 in the direction toward the drive unit 21 to contact the valve seat 1g. Touching. For this reason, the heat transfer fluid (for example, hot water) flowing into the internal flow path 1c from the first water passage 1a (FIGS. 1 and 2) is blocked by the valve body 12 and the valve seat 1g, and the second water passage 1b. Does not reach.

  On the other hand, when the thermally responsive element 24 is heated by the heater 22, the thermally responsive element 24 moves the valve shaft 13 toward the second elastic member 14 in the axial direction. For this reason, the valve body 12 is separated from the valve seat 1g. As a result, the heat transfer fluid (for example, hot water) that has flowed into the internal flow path 1c from the first water passage 1a passes between the valve body 12 and the valve seat 1g, and flows out from the second water passage 1b.

  When the heating of the thermally responsive element 24 by the heater 22 is completed, there is no force that the thermally responsive element 24 pushes the valve shaft 13 toward the second elastic member 14 in the axial direction. For this reason, due to the urging force of the second elastic member 14, the valve body 12 and the valve seat 1 g come into contact again to return to the above-described state where the flow of the heat transfer fluid is blocked. In this manner, in the thermal valve 50A, whether or not the heat transfer fluid (for example, hot water) passes through the internal flow path 1c can be switched depending on whether or not the heating by the heater 22 is performed.

(Manufacturing method of thermal valve unit in the embodiment)
Next, with reference to FIGS. 2-7, the manufacturing method of the thermal valve unit 50 in this Embodiment is demonstrated.

  As shown in FIGS. 2 and 3, the first housing H1 of the thermal valve unit 50 is prepared. In addition, the second housing H2 is prepared. As shown in FIGS. 5 and 6, the first seal member is between the first annular portion C1 and the first tubular portion T1 in a state where the first flow path F1 and the first passage W1 are in communication. After sealing by S1, the space between the second annular portion C2 and the second tubular portion T2 is sealed by the second seal member S2 in a state where the second flow path F2 and the second passage W2 are communicated.

  As shown in FIG. 5, the first tubular portion T1 is inserted into the first annular portion C1. Thereby, the 1st flow path F1 and the 1st channel | path W1 are connected. In this state, the space between the first annular portion C1 and the first tubular portion T1 is sealed (sealed) by the first seal member S1. First, the first seal member S1 locked to the first locking portion L1 contacts the first annular portion C1 in the first opening OP1. The cross-sectional diameter of the first seal member S1 before the first seal member S1 is deformed between the first annular portion C1 and the first tubular portion T1 is the inner peripheral surface of the first annular portion C1 and the first cylinder. It is larger than the gap with the outer peripheral surface of the shape portion T1. Therefore, the first seal member S1 is in contact with the first annular portion C1 in the first opening OP1 until the first seal member S1 is installed in the gap between the inner peripheral surface of the first annular portion C1 and the first tubular portion T1. A particularly large load is applied to the member S1. Therefore, when the first seal member S1 is pushed into the first opening OP1, the load relating to the first seal member S1 reaches a peak (maximum).

  As shown in FIG. 6, after the space between the first annular portion C1 and the first tubular portion T1 is sealed by the first seal member S1, the space between the second annular portion C2 and the second tubular portion T2 Is sealed by the second seal member S2. The second tubular portion T2 is inserted into the second annular portion C2. Thereby, the 2nd flow path F2 and the 2nd channel | path W2 are connected. In this state, the space between the second annular portion C2 and the second cylindrical portion T2 is sealed (sealed) by the second seal member S2. When the installation in the gap between the inner peripheral surface of the first annular portion C1 of the first seal member S1 and the first tubular portion T1 is completed, the load applied to the first seal member S1 becomes smaller than before the completion.

  On the other hand, the second seal member S2 locked to the second locking portion L2 contacts the second annular portion C2 in the second opening OP2. The cross-sectional diameter of the second seal member S2 before the second seal member S2 is deformed between the second annular portion C2 and the second tubular portion T2 is the inner peripheral surface of the second annular portion C2 and the second tubular shape. It is larger than the gap with the outer peripheral surface of the portion T2. Therefore, the second seal member S2 is in contact with the second annular portion C2 in the second opening OP2 until the second seal member S2 is installed in the gap between the inner peripheral surface of the second annular portion C2 and the second tubular portion T2. A particularly large load is applied to the member S2. Therefore, when the second seal member S2 is pushed into the second opening OP2, the load related to the second seal member S2 reaches a peak (maximum).

  As shown in FIG. 7, the space between the first annular portion C1 and the first tubular portion T1 is sealed by the first seal member S1, and the space between the second annular portion C2 and the second tubular portion T2 is sealed. After sealing by the second seal member S2, the space between the third annular portion C3 and the third tubular portion T3 is sealed by the third seal member S3. The third tubular portion T3 is inserted into the third annular portion C3. Thereby, the 3rd flow path F3 and the 2nd channel | path W2 are connected. In this state, the space between the third annular portion C3 and the third tubular portion T3 is sealed (sealed) by the third seal member S3. When the installation in the gap between the inner peripheral surface of the second annular portion C2 of the second seal member S2 and the second tubular portion T2 is completed, the load applied to the second seal member S2 becomes smaller than before the completion.

  On the other hand, the third seal member S3 locked to the third locking portion L3 contacts the third annular portion C3 at the third opening OP3. The cross-sectional diameter of the third seal member S3 before the third seal member S3 is deformed between the third annular portion C3 and the second tubular portion T2 is the inner peripheral surface of the third annular portion C3 and the third tubular shape. It is larger than the gap with the outer peripheral surface of the portion T3. Therefore, the third seal member S3 comes into contact with the third annular portion C3 in the third opening OP3 and then is installed in the gap between the inner peripheral surface of the third annular portion C3 and the third tubular portion T3. A particularly large load is applied to the member S3. Therefore, when the third seal member S3 is pushed into the third opening OP3, the load related to the third seal member S3 reaches a peak (maximum).

  As shown in FIG. 4, when the installation in the gap between the inner peripheral surface of the third annular portion C3 of the third seal member S3 and the third tubular portion T3 is completed, the second housing H2 becomes the first housing. It is attached to H1 with a bolt 46 (FIG. 2). In this way, the assembly of the first housing H1 and the second housing H2 is completed.

  In the manufacturing method of the thermal valve unit 50 in the present embodiment, the timing at which a particularly large load is applied to each of the first seal member S1, the second seal member S2, and the third seal member S3 is shifted.

(Effect in embodiment)
Next, the effects of the present embodiment will be described in comparison with a comparative example.

  With reference to FIG. 8 and FIG. 9, the thermal valve unit 50 in a comparative example is demonstrated. As shown in FIG. 8, in the second direction D2, the thermal valve unit 50 according to the comparative example has positions of the first seal member S1, the second seal member S2, and the third seal member S3 in the main flow path FP. The same is true. Therefore, as shown in FIG. 9, since the load is simultaneously applied to the first seal member S1, the second seal member S2, and the third seal member S3 during insertion, it is difficult to assemble the thermal valve unit 50.

  On the other hand, according to the thermal valve unit 50 in the present embodiment, the position of the first seal member S1 in the second direction D2 is relatively relative to the position of the second seal member S2 with respect to the main flow path FP. It is off. For this reason, the timing at which the load is applied to the first seal member S1 and the timing at which the load is applied to the second seal member S2 can be shifted. Therefore, the load applied simultaneously to the first seal member S1 and the second seal member S2 can be reduced. Thereby, the assembly of the thermal valve unit 50 is facilitated.

  Further, in the second direction D2, the position of the second seal member S2 is shifted relative to the position of the third seal member S3 with respect to the main flow path FP. For this reason, the timing at which the load is applied to the second seal member S2 and the timing at which the load is applied to the third seal member S3 can be shifted. Therefore, it is possible to reduce the load simultaneously applied to the second seal member S2 and the third seal member S3. Thereby, the assembly of the thermal valve unit 50 is facilitated.

  As shown in FIG. 10, in the thermal valve unit 50 in the comparative example, the load is increased because the first seal member S1, the second seal member S2, and the third seal member S3 are simultaneously loaded. On the other hand, according to the thermal valve unit 50 in the present embodiment, the timing at which the load is applied to the first seal member S1, the second seal member S2, and the third seal member S3 is shifted, so that the load is dispersed. . And load is equalized.

  In the thermal valve unit 50 according to the present embodiment, the distance DS1 from the first opening OP1 to the first seal member S1 in the second direction D2 is greater than the distance DS2 from the second opening OP2 to the second seal member S2. large. For this reason, the position of the first seal member S1 is closer to the main flow path FP than the position of the second seal member S2 in the second direction D2. In this way, the position of the first seal member S1 in the second direction D2 can be shifted relative to the position of the second seal member S2 with respect to the main flow path FP.

  In the thermally operated valve unit 50 in the present embodiment, each of the first seal member S1 and the second seal member S2 is an O-ring. Since the O-ring is highly versatile, the cost is low. For this reason, the cost of the thermal valve operating unit 50 can be reduced.

  In the thermal valve unit 50 according to the present embodiment, the first seal member S1 is disposed closer to the main flow path FP in the second direction D2 than the second seal member S2, and the second seal member S2 is the third seal. It is arranged closer to the main flow path FP in the second direction D2 than the member S3. For this reason, at the time of assembly, the first seal member S1, the second seal member S2, the third seal member S3 from the third seal member S3 side in the direction in which the first seal member S1, the second seal member S2, and the third seal member S3 are aligned with each other. When the seal member S3 is viewed, it is easy to visually recognize the first seal member S1, the second seal member S2, and the third seal member S3. Therefore, the visibility of the first seal member S1, the second seal member S2, and the third seal member S3 can be improved. Thereby, the assembly of the thermal valve unit 50 is facilitated.

  According to the method for manufacturing the thermal valve unit 50 in the present embodiment, the space between the first annular portion C1 and the first tubular portion T1 is sealed by the first seal member S1, and then the second annular portion C2 and The space between the second cylindrical portion T2 is sealed by the second seal member S2. For this reason, the timing at which the load is applied to the first seal member S1 and the timing at which the load is applied to the second seal member S2 can be shifted. Therefore, the load applied simultaneously to the first seal member S1 and the second seal member S2 can be reduced. Thereby, the assembly of the thermal valve unit 50 is facilitated.

  Further, after the space between the second annular portion C2 and the second tubular portion T2 is sealed by the second seal member S2, the space between the third annular portion C3 and the third tubular portion T3 is the third seal member S3. It is sealed by. For this reason, the timing at which the load is applied to the second seal member S2 and the timing at which the load is applied to the third seal member S3 can be shifted. Therefore, it is possible to reduce the load simultaneously applied to the second seal member S2 and the third seal member S3. Thereby, the assembly of the thermal valve unit 50 is facilitated.

(Modification)
With reference to FIG. 11, a thermal valve unit 50 according to a modification of the present embodiment will be described. As shown in FIG. 11, in the second direction D2, the first seal member S1 may be disposed so as not to overlap the second seal member S2. That is, in the second direction D2, the first seal member S1 is completely displaced from the second seal member S2.

  In the second direction D2, the third seal member S3 may be arranged so as not to overlap the first seal member S1 and the second seal member S2. That is, in the second direction D2, the third seal member S3 is completely displaced from the first seal member S1 and the second seal member S2.

  According to the thermal valve unit 50 in the modification of the present embodiment, the first seal member S1 is disposed so as not to overlap the second seal member S2, and therefore the first seal member S1 and the second seal member S2 are arranged. The timing at which the load is applied to each can be reliably shifted.

  Further, since the third seal member S3 is disposed so as not to overlap the first seal member S1 and the second seal member S2, each of the first seal member S1, the second seal member S2, and the third seal member S3 is provided. The timing at which the load is applied can be reliably shifted.

(Applicable range in the embodiment)
In the present embodiment, the thermally responsive element 24 may be an element other than the wax element as long as it is an element that responds by heating. The heater 22 may be other than a PTC thermistor as long as it can heat the thermally responsive element 24.

(Configuration of hot water heater in the embodiment)
Next, with reference to FIG. 12, the structure of the hot water heating apparatus 60 is demonstrated as an example of the heat source machine which concerns on embodiment of this invention. Thermally operated valve unit 50 in the present embodiment is used in hot water heater 60.

  As shown in FIG. 12, the hot water heater 60 includes a thermal valve unit 50, a tank 51, a pump 52, a fan 53, a burner 54, a primary heat exchanger 55, and a secondary heat exchanger 56. And pipes 57a to 57g.

  The pipe 57 a is a water supply pipe and is connected to the tank 51. One end of a pipe 57b is connected to the tank 51. A pump 52 is disposed in the pipe 57b. The other end of the pipe 57b is branched into a pipe 57c and a pipe 57d. That is, each of one end of the pipe 57c and one end of the pipe 57d is connected to the other end of the pipe 57b.

  The other end of the pipe 57 c is connected to the primary heat exchanger 55. The other end of the pipe 57 d is a part connected to the low temperature heating terminal 61.

  One end of the pipe 57 e is connected to the primary heat exchanger 55. The other end of the pipe 57 e is a part connected to the high temperature heating terminal 62.

  One end of the pipe 57 f is a portion connected to each of the low temperature heating terminal 61 and the high temperature heating terminal 62. The other end of the pipe 57f is connected to the secondary heat exchanger 56.

  One end of the pipe 57g is connected to the secondary heat exchanger 56. The other end of the pipe 57g is connected to the tank 51.

  The burner 54 is for generating combustion gas as a heating gas by burning the mixed gas. The fan 53 is for sending the combustion gas generated in the burner 54 to the primary heat exchanger 55 and the secondary heat exchanger 56.

  The primary heat exchanger 55 is for recovering sensible heat of the combustion gas. The secondary heat exchanger 56 is for recovering the latent heat of the combustion gas. The primary heat exchanger 55 is disposed in the vicinity of the burner 54. The secondary heat exchanger 56 is disposed at a position through which the combustion gas after passing through the primary heat exchanger 55 passes.

  The tank 51 is for storing a heat transfer fluid (for example, hot water). The pump 52 is for circulating a heat transfer fluid (for example, hot water) in the direction of the arrow in the figure. By this pump 52, the heat transfer fluid in the tank 51 circulates through the pipes 57 b to 57 g, the low temperature heating terminal 61, and the high temperature heating terminal 62.

  Specifically, the heat transfer fluid that has entered the pipe 57 d from the tank 51 by the pump 52 is supplied to the low-temperature heating terminal 61. Thereby, heating is performed in the low-temperature heating terminal 61.

  The heat transfer fluid that has entered the pipe 57 c from the tank 51 by the pump 52 is heated by the primary heat exchanger 55 and then supplied to the high-temperature heating terminal 62. Thereby, heating is performed in the high temperature heating terminal 62.

  The heat transfer fluid that has lost heat at the low temperature heating terminal 61 and the high temperature heating terminal 62 is heated by the secondary heat exchanger 56 through the pipe 57 f and then returns to the tank 51. The temperature of the heat transfer fluid flowing through the pipe 57d is lower than the temperature of the heat transfer fluid flowing through the pipe 57e.

  In the hot water heating apparatus 60 as described above, the thermal valve unit 50 of the present embodiment is connected to, for example, a pipe 57d. Thus, the thermal valve unit 50 is arranged on the route of the pipe 57d. The thermal valve unit 50 can control supply and interruption of the heat transfer fluid to the low-temperature heating terminal 61 by controlling the thermal valve unit 50 to open and close.

  According to the hot water heating device 60 in the present embodiment, it is possible to provide the hot water heating device 60 including the thermal valve unit 50 that can be easily assembled.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Valve housing | casing, 1a 1st water flow part, 1b 2nd water flow part, 1c internal flow path, 1d shaft insertion hole, 1e drive part housing | casing, 1f internal space, 1g valve seat, 1k housing body, 11 valve Main body, 12 Valve body, 13 Valve shaft, 14 Second elastic member, 21 Drive part, 22 Heater, 23a First electrode member, 23b Second electrode member, 24 Thermally responsive element, 24a Thermal part, 24b Shaft body, 25 Insulation Retainer, 25a Tubular part, 25b Bottom part, 25c Flange part, 26 Insulating spacer, 27 First elastic member, 31 Seal member, 32 Ring, 41 Lid, 42 Protruding part, 43 Connection part, 44 Drip-proof cover, 45, 46 Bolt, 50 Thermal valve unit, 50A Thermal valve, 50A1 First thermal valve, 50A2 Second thermal valve, 50A3 Third thermal valve, 51 Tank, 52 Pump, 53 Fan, 54 bar , 55 Primary heat exchanger, 56 Secondary heat exchanger, 57a, 57b, 57c, 57d, 57e, 57f, 57g Piping, 60 Hot water heater, 61 Low temperature heating terminal, 62 High temperature heating terminal, C1 first annular part, C2 second annular part, C3 third annular part, D1 first direction, D2 second direction, DS1, DS2, DS3 distance, F1 first flow path, F2 second flow path, F3 third flow path, FP main flow path , H1 first housing, H2 second housing, HP housing portion, L1 first locking portion, L2 second locking portion, L3 third locking portion, OP1 first opening, OP2 second opening, OP3 3rd opening, S1 1st sealing member, S2 2nd sealing member, S3 3rd sealing member, T1 1st cylindrical part, T2 2nd cylindrical part, T3 3rd cylindrical part, T11 1st main-body part, T12 First protrusion, T21 second main body, T22 second Outlet, T31 third main body, T32 third protrusion, V1 first thermal valve, V2 second thermal valve, V3 third thermal valve, W1 first passage, W2 second passage, W3 Third passage.

Claims (7)

A first channel including a main channel extending in the first direction, a first annular part having a first channel communicating with the main channel, and a second annular part having a second channel communicating with the main channel; A housing,
A first cylindrical part having a first passage communicating with the first flow path, and a second cylinder integrally formed with the first cylindrical part having a second passage communicating with the second flow path. A second housing including a shaped portion;
A first seal member that seals between the first annular portion and the first tubular portion;
A second seal member that seals between the second annular portion and the second tubular portion;
A first thermal valve portion and a second thermal valve portion housed in the first housing and the second housing;
The first thermal valve portion is configured to open and close the first passage,
The second thermal valve portion is configured to open and close the second passage,
In the second direction orthogonal to the first direction, the position of the first seal member is shifted relative to the position of the second seal member with respect to the main flow path. The first flow path includes a first opening into which the first tubular portion is inserted,
The second flow path includes a second opening into which the second cylindrical portion is inserted,
In the second direction, the first opening and the second opening are arranged at the same position with respect to the main channel,
2. The thermal valve unit according to claim 1, wherein in the second direction, a distance from the first opening to the first seal member is larger than a distance from the second opening to the second seal member.   The thermal valve unit according to claim 1 or 2, wherein the first seal member is disposed so as not to overlap the second seal member in the second direction.   The thermal valve unit according to any one of claims 1 to 3, wherein each of the first seal member and the second seal member is an O-ring. The first housing includes a third annular portion having a third flow path communicating with the main flow path,
The second casing includes a third passage having a third passage communicating with the third flow path and formed integrally with the first tubular portion and the second tubular portion,
A third seal member that seals between the third annular portion and the third tubular portion;
A third thermal valve that is housed in the first housing and the second housing;
The third thermal valve portion is configured to open and close the third passage,
The first seal member is disposed closer to the main flow path in the second direction than the second seal member, and the second seal member is disposed in the main flow path in the second direction than the third seal member. The thermal valve unit according to any one of claims 1 to 4, wherein the thermal valve unit is disposed in the vicinity. Piping,
A heat source apparatus comprising the thermal valve unit according to claim 1 disposed on a route of the piping. Preparing a first housing including a main channel, a first annular part having a first channel communicating with the main channel, and a second annular part having a second channel communicating with the main channel; ,
A first cylindrical part having a first passage communicating with the first flow path, and a second cylinder integrally formed with the first cylindrical part having a second passage communicating with the second flow path. Preparing a second housing including a shape portion;
After the first annular portion and the first tubular portion are sealed by the first seal member in a state where the first passage and the first passage are in communication, the second passage and the first passage A method of manufacturing a thermal valve unit, comprising: a step of sealing between the second annular portion and the second cylindrical portion with a second seal member in a state where the second passage is in communication.

Images