JP2020008104A - Temperature-sensitive control valve - Google Patents

Abstract

To quickly supply a refrigerant in accordance with temperature change of a heat source, in a temperature-sensitive control valve 100 disposed in refrigerant supply piping of a cooling device for cooling the heat source requiring cooling.SOLUTION: A temperature-sensitive control valve includes a thermoelement 20 having a temperature sensitive portion 21a filled with a thermal expansion body 2A, a piston 23 to which volume change of the thermal expansion body 2A is transmitted by a deformable non-compressive fluid 2B, and a guide portion 22a slidably guiding the piston 23 in a direction of axis L. It further includes a valve device main body 10 for opening and closing a valve port 13 through which a refrigerant flows, by a valve element 3. A structural portion including the valve element 3 is tightly sealed by a diaphragm 43. An operation portion 4 is disposed to transmit mechanical pressing force in the direction of axis L to the valve element 3 through the diaphragm 43. A valve opening point for bringing the valve port 13 into an open state by the valve element 3 by application of the mechanical pressing force due to movement of the piston 23 of the thermoelement 20 to the diaphragm 43, is determined with a range of a solid-liquid mixing state of the thermal expansion body 2A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a temperature-responsive control valve that supplies a refrigerant to a cooling device or the like that cools a heat source.

  2. Description of the Related Art Conventionally, for example, in the information processing field, a system that generates a large amount of heat, such as a server, is cooled by a circulating refrigerant. For example, Japanese Unexamined Patent Application Publication No. 2009-224406 (Patent Document 1) discloses a waste heat utilization system in which a cooling device is arranged in a rack of a blade server to cool the inside of the rack. JP-A-2017-67164 (Patent Document 2) discloses a thermoelement and a piston assembly suitable for sensing the temperature of a heat source.

JP 2009-224406 A JP 2017-67164 A

  In the technique of Patent Literature 1, cooling is performed using cooling water (refrigerant). However, in a device such as a server, the amount of heat generated varies greatly depending on the operation state. For this reason, when the heat source reaches the set temperature, it is required to immediately open the valve port, immediately flow the amount of refrigerant required for cooling, and quickly cool the heat source.

  The present invention is a temperature-sensitive control valve that is provided in a refrigerant supply pipe of a cooling device that cools a heat source that requires cooling, and when the heat source reaches a set temperature, opens a valve port widely and can supply the refrigerant quickly. The task is to provide

  A temperature-sensitive control valve according to claim 1, wherein a thermo-element for moving a piston in an axial direction by a volume change of a thermal expansion body which expands and contracts in accordance with a temperature change, and a valve device for opening and closing a valve port for flowing a refrigerant by the valve body. A valve having an operation unit that is a main body, the structure including the valve body being hermetically sealed by a sealing member, and transmitting the mechanical pressing force in the axial direction to the valve body via the sealing member. An apparatus main body, wherein the mechanical port is moved from the closed state to the open state by applying a mechanical pressing force due to the axial movement of the piston of the thermoelement to the valve body. The valve opening point at which the pressing force starts to be applied to the valve body is set within a range of a solid-liquid mixed expansion area where the solid and liquid of the thermal expansion body are mixed and expanded.

  A temperature-sensitive control valve according to a second aspect is the temperature-sensitive control valve according to the first aspect, wherein the operating portion is configured such that the sealing member and the valve body are in direct contact with each other. It is characterized by.

  The temperature-sensitive control valve according to claim 3 is the temperature-sensitive control valve according to claim 1, wherein the operating portion is configured so that the sealing member and the piston come into direct contact with each other. Features.

  The temperature-sensitive control valve according to a fourth aspect is the temperature-sensitive control valve according to the third aspect, wherein a piston-side abutment is integrally provided at an end of the piston on the sealing member side. Features.

  The temperature-sensitive control valve according to claim 5 is the temperature-sensitive control valve according to claim 1, wherein the operating unit includes a valve body-side contact disposed on the valve body side of the sealing member, The sealing member applies the pressing force to the valve body via the valve body-side contact.

  The temperature-sensitive control valve according to claim 6 is the temperature-sensitive control valve according to claim 1, wherein the operation unit includes a piston-side abutment disposed on the piston side of the sealing member, The piston applies the pressing force to the sealing member via the piston side contact.

  The temperature-sensitive control valve according to claim 7, wherein the operating portion includes a piston-side abutment disposed on the piston side of the sealing member, and the valve. A valve body-side abutment disposed on the body side, and when the valve is in a closed state, the valve-body-side abutment is in contact with the valve body and the piston-side abutment does not receive the pressing force from the piston. It is characterized by comprising.

  The temperature-sensitive control valve according to claim 8, wherein the operating portion is a piston-side abutment disposed on the piston side of the sealing member; A valve body-side abutment disposed on the body side, and when the valve is in a closed state, the piston-side abutment is configured to be in contact with the piston and the valve-body-side abutment is separated from the valve body. It is characterized by being.

  A temperature-sensitive control valve according to a ninth aspect is the temperature-sensitive control valve according to any one of the first to eighth aspects, wherein the thermoelement includes a temperature-sensitive part filled with the thermal expansion body. The temperature sensing portion is provided so as to be exposed on the opposite side of the valve device body from the operation portion.

  According to the temperature-sensitive control valve of the first to ninth aspects, the following effects can be obtained as an example. In the thermoelement, the thermal expansion coefficient of the thermal expansion body is much higher in the “solid-liquid mixed expansion area” than in the “solid expansion area” or “liquid expansion area”. In the present invention, the valve opening point at which the piston of the thermoelement starts to apply the pressing force to the valve body is set within the range of the “solid-liquid mixed expansion area” where the thermal expansion coefficient of the thermal expansion body in this thermoelement is large. Have been. Therefore, when the heat source reaches the set temperature, the valve port can be quickly opened widely, and the heat source can be quickly cooled by quickly supplying the refrigerant to the cooling device or the like.

  Further, since the sealing member is provided, the thermoelement does not contact the refrigerant by the sealing member, so that the refrigerant does not enter the inside of the thermoelement. Therefore, when the sealing member is not provided, there is a possibility that the refrigerant expands or deteriorates the rubber piston or the diaphragm of the thermoelement due to the refrigerant, thereby causing leakage of the thermal expansion body or the fluid, deterioration of the slidability of the piston, etc. Then, this can be solved. Therefore, when the heat source reaches the set temperature, the valve port can be quickly and widely opened, and the heat source can be quickly cooled.

  According to the temperature-sensitive control valve of the ninth aspect, since the temperature-sensitive portion of the thermoelement is exposed from the valve device main body side, the temperature-sensitive portion can be easily attached to a metal plate or the like of the heat source. Therefore, the temperature of the heat source can be directly sensed, the responsiveness of the opening and closing operation of the valve can be improved, the temperature change of the heat source can be followed, and the heat source can be cooled quickly.

It is a longitudinal section of a temperature sensitive control valve of a 1st embodiment of the present invention. FIG. 2 is a top view of the temperature-sensitive control valve according to the embodiment of the present invention. It is a longitudinal section of a thermoelement in a temperature-responsive control valve of an embodiment of the present invention. It is a figure showing the temperature-displacement characteristic of the thermo element in the temperature-responsive control valve of the embodiment of the present invention. It is a longitudinal section of a temperature sensitive control valve of a 2nd embodiment of the present invention.

  Next, an embodiment of a temperature-sensitive control valve of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of the temperature-sensitive control valve of the embodiment, FIG. 2 is a top view of the temperature-sensitive control valve, and FIG. 3 is a longitudinal sectional view of a thermo-element in the temperature-sensitive control valve. Note that the concept of “up and down” in the following description corresponds to the up and down directions in FIGS. 1 and 3. In the following description, the temperature-sensitive control valve according to the embodiment will be appropriately referred to as a “control valve”.

  The control valve 100 of the embodiment includes a valve device main body 10 and a thermoelement 20. The valve device main body 10 has a metal valve housing 1, and a cylindrical valve chamber 1 </ b> A is formed in the center of the valve housing 1. One port 11 is formed, and further, a second port 12 through which the refrigerant flows out is formed. In the valve housing 1, a valve port 13 having an axis L as a center is formed between the valve chamber 1 </ b> A and the second port 12, and the second port is coaxial with the valve port 13 from above the valve housing 1. A guide hole 14 penetrating up to 12 is formed. The guide hole 14 has a cylindrical shape with the axis L of the valve port 13 as a central axis. In some cases, the refrigerant may flow in from the second port 12 and flow out of the first port.

  The valve body 3 is disposed in the valve chamber 1A, the second port 12, and the guide hole 14. The valve body 3 includes a cylindrical rod-shaped valve rod 3a, a substantially conical needle part 3b for opening and closing the valve port 13 from the valve chamber 1A side, and a flange part 3c formed on the outer periphery of the needle part 3b. I have. The valve stem 3a is inserted into the guide hole 14, and a coil spring 32 is disposed between the flange 3c and the spring receiver 31 at the bottom of the valve chamber 1A. Thereby, the coil spring 32 urges the valve body 3 toward the diaphragm 43 described later.

  An operation section 4 is attached to the valve housing 1 on the side opposite to the valve chamber 1A. The operation unit 4 includes a lower lid 41 fixed to the valve housing 1, an upper case 42 having the same diameter as the lower lid 41, and a diaphragm as a “sealing member” disposed between the lower lid 41 and the upper case 42. 43, a lower pad 44 serving as a "valve plug" disposed between the diaphragm 43 and the valve rod 3a of the valve body 3 in the lower lid 41, and a lower pad 44 disposed on the diaphragm 43 in the upper case 42. And the upper support 45 as the “piston side support”. The lower lid 41, the diaphragm 43, and the upper case 42 are welded at the outer peripheral edge and are integrally joined. As shown in the top view of FIG. 2, the valve housing 1 is rectangular, but the upper case 42 (and the lower lid 41, the diaphragm 43) and the thermoelement 20 are rotationally symmetric about the axis L. The diaphragm 43 is formed of a thin-film metal ring and has a flat flange surface at the outer periphery and a planar contact surface that contacts the upper and lower supports 45 and 44 at the center. A corrugated annular portion is formed between the flange surface of the outer peripheral portion and the contact surface of the central portion. The contact surface is an operation surface for applying a mechanical pressing force in the direction of the axis L to the valve body 3 via the diaphragm 43.

  The contact area of the lower abutment 44 with the diaphragm 43 is larger than the area of the distal end surface of the valve stem 3a on the diaphragm 43 side. Thereby, as described later, when the diaphragm 43 is deformed by the action of the thermoelement 20 to transmit the pressing force to the valve rod 3a, the reaction force received from the valve rod 3a is applied to the diaphragm 43 over a wide area of the lower support 44. Therefore, the diaphragm 43 can be dispersed, and the durability of the diaphragm 43 can be improved. Similarly, the contact area of the upper contact 45 with the diaphragm 43 is larger than the area of the distal end surface of the piston 23 on the diaphragm 43 side, which will be described later. Thus, the pressing force can be dispersed and transmitted to the diaphragm 43 over a wider area of the upper support 45 than when the piston 23 directly contacts the diaphragm 43, and the durability of the diaphragm 43 can be improved.

  As a result, the operation unit 4 allows the diaphragm 43 and the lower lid 41 to hermetically seal the structure of the lower arm 44 and the valve stem 3a, and also allows the diaphragm 43 and the lower lid 41 to move from the upper arm 45 in the upper case 42 to the outside of the diaphragm 43. It has a function of transmitting a mechanical pressing force in the direction of the axis L to the valve element 3 (valve rod 3 a) via the diaphragm 43 and the lower support 44. The thermoelement 20 (part thereof) is accommodated in the cylindrical portion 42a of the upper case 42 of the operation unit 4, and the thermosensitive element 21a of the thermoelement 20 is exposed from the upper end of the upper case 42 and the thermoelement 20 is exposed. An engagement piece 42a1 at the end of the cylindrical portion 42a is engaged with an end of the temperature-sensing portion-side base 21b on the temperature-sensing portion 21a side.

  The thermoelement 20 is a thermoactuator utilizing expansion and contraction of paraffin or the like due to a temperature change. As shown in FIG. 3, the thermoelement 20 includes a temperature-sensitive case 21, a guide case 22, a piston 23, a diaphragm 24, a rubber piston 25, and a protection plate 26. The temperature sensing case 21 includes a cylindrical temperature sensing portion 21 a having a bottom at an end portion, and a temperature sensing portion side base 21 b covering a part of the guide case 22. The guide case 22 includes a cylindrical guide portion 22a in which the piston 23, the rubber piston 25, and the protection plate 26 are inserted, and a guide side base portion 22b covered by the temperature sensing portion side base portion 21b of the temperature sensing case 21. I have.

  Mainly in the temperature-sensitive portion 21a of the temperature-sensitive case 21, a thermal expansion body 2A made of wax such as paraffin is filled, and a lower end surface of the thermal expansion body 2A is sealed by a diaphragm 24 which is an elastic sealing member. I have. A fluid chamber is provided between the mortar-shaped inner surface 22b1 of the guide-side base 22b of the guide case 22 and the lower side of the diaphragm 24, and the fluid chamber is filled with a fluid 2B. The fluid 2B is a non-compressible fluid that is incompressible and has good fluidity and lubricity. A piston 23 is slidably inserted into a piston sliding hole 22a1 inside the guide portion 22a of the guide case 22 via a rubber piston 25 and a protection plate 26, and the outer end of the piston 23 is It protrudes from the moving hole 22a1.

  When the environmental temperature of the temperature sensing section 21a rises, the thermal expansion body 2A expands and the diaphragm 24 expands, pushing down the fluid 2B sealed in the fluid chamber below the diaphragm 24. As a result, the fluid 2B is deformed and a part of the fluid 2B enters the piston sliding hole 22a1 of the guide portion 22a, and pushes down the piston 23 via the rubber piston 25 and the protection plate 26.

  As shown in FIG. 1, a play hole 45 a, a guide insertion hole 45 b, and a spring receiving hole 45 c are formed coaxially in the upper support 45, and the piston 23 of the thermoelement 20 faces the play hole 45 a, The guide portion 22a is inserted into the guide insertion hole 45b. A fixed spring 46 is provided on the outer periphery of the guide portion 22a. The fixed spring 46 is provided by being compressed between the temperature-sensitive-portion-side base 21b in the cylindrical portion 42a and the bottom of the spring accommodating hole 45c. Have been. That is, as described above, since the end of the temperature sensing portion side base 21b is engaged with the locking piece 42a1 of the cylindrical portion 42a, the thermoelement 20 is fixed to the cylindrical portion 42a by the spring force of the fixed spring 46. ing. Further, the temperature sensing portion 21a of the thermoelement 20 is exposed in a cylindrical shape, and has a structure that can be easily mounted on a temperature sensing target. The temperature sensing portion 21a is mounted in the mounting hole 50a of the metal plate 50, and heat from the metal plate 50 is transmitted to the temperature sensing portion 21a. The metal plate 50 is in close contact with a heat source (not shown).

  With the above configuration, when the temperature of the temperature sensing portion 21a of the thermoelement 20 rises from the state of FIG. 1 and the piston 23 descends as described above, the piston 23 comes into contact with the upper support 45 (the bottom of the play hole 45a). . Further, when the piston 23 descends, the upper pad 45 descends, the diaphragm 43 is deformed, the lower pad 44 descends, and the valve body 3 in contact with the lower pad 44 descends. As described above, in the first embodiment, the moment when the pressing force of the piston 23 starts to be applied to the valve body 3 via the upper pad 45, the diaphragm 43, and the lower pad 44 is the "valve opening point". The needle portion 3b of the valve body 3 is separated from the periphery of the valve port 13 from the opening point, and the valve port 13 is opened.

  FIG. 4 is a diagram showing a temperature-displacement characteristic showing a relationship between the temperature of the temperature sensing portion 21a in the thermoelement 20 and the displacement (lift) of the piston 23. The thermal expansion body 2A in the temperature sensing part 21a changes its phase according to the temperature, such as a solid state, a solid-liquid mixed state in which a solid and a liquid are mixed, and a liquid state. Thus, the temperature-displacement characteristics include a “solid expansion region” that expands in a solid state, a “solid-liquid mixed expansion region” that expands in a solid-liquid mixed state, and a “liquid expansion region” that expands in a liquid state. Each has a different slope. Then, the gradient in the solid-liquid mixed expansion region, that is, the temperature expansion coefficient becomes the largest (steep). This temperature-displacement characteristic is known as a characteristic unique to the thermoelement 20, and in this case, the range of the lifts L1 to L3 of the piston 23 corresponds to the "solid-liquid mixed expansion region".

  Here, as described above, the valve opening point in the valve device main body 10 is set so as to be within the range of the “solid-liquid mixed expansion area”. In this embodiment, the valve opening point is set in a state where “valve opening lift = 0” and “thermo element lift = L2” shown in FIG. As described above, since the valve opening point is set within the range of the “solid-liquid mixed expansion area” where the thermal expansion coefficient of the thermal expansion body 2A in the thermoelement 20 is large, when the heat source reaches the set temperature, the valve port 13 can be quickly opened widely. Thereby, the refrigerant can be quickly supplied to the cooling device (not shown) following the temperature change of the heat source, and as a result, the heat source can be rapidly cooled.

  In the thermoelement 20, when the temperature of the temperature sensing portion 21a decreases and the thermal expansion body 2A contracts, a vacuum gap is formed in the thermal expansion body 2A solidified without moving the diaphragm 24, or a fluid is formed. A void may be formed in 2B. Further, the diaphragm 24 may be deformed due to contraction in the thermal expansion body 2A, and the fluid 2B may also change its shape. In such a case, with the piston 23 protruding, the rubber piston 25 and the protection plate 26 are also stopped on the piston 23 side, or only the rubber piston 25 is moved following the fluid 2B. In some cases, the rubber piston 25 and the protection plate 26 may move to follow the fluid 2B. In any case, when the piston 23 protrudes and stops, the piston 23 does not apply a pressing force to the operating portion 4 (or the valve body 3), and is different from the “valve opening point” in the present invention. State.

  In the first embodiment, the thermal expansion body 2A repeatedly expands and contracts due to a temperature change of the heat source. However, in a temperature range equal to or lower than the valve opening point, the diaphragm 43 is not displaced because the pressing force is not applied to the diaphragm 43. 43 has improved durability.

  FIG. 5 is a longitudinal sectional view of a temperature-sensitive control valve according to a second embodiment of the present invention. In the second embodiment, the same elements as those in the first embodiment are denoted by the same reference numerals as in FIGS. The repeated description will be omitted as appropriate. The difference between the first embodiment and the second embodiment is mainly the structure and operation of the operation unit 4 and the operation unit 4 ′ provided on the upper part of the valve housing 1.

  In the operation part 4 'of the second embodiment, a lower support 44' as a "valve-side support" is disposed between the diaphragm 43 and the valve stem 3a 'of the valve body 3 in the lower cover 41, and is provided with a coil. It is urged toward the diaphragm 43 by a spring 47. The lower paddle 44 'has a play hole 44a', in which the end of the valve stem 3a 'is arranged. The valve stem 3a 'is shorter than the valve stem 3a of the first embodiment. In addition, the upper support 45 'as the "piston side support" has a piston hole 45a' which is shallower than the play hole 45a in the first embodiment. As in the case of the first embodiment, the operation part 4 ′ hermetically seals the structure of the diaphragm 43 and the lower lid 41, which comprises the lower abutment 44 ′ and the valve stem 3 a ′. That is, it has a function of transmitting the mechanical pressing force from the upper pad 45 'in the upper case 42 to the valve element 3 (valve rod 3a') via the diaphragm 43 and the lower pad 44 '.

  In the second embodiment, when the temperature of the temperature sensing portion 21a of the thermoelement 20 rises from the state shown in FIG. 1 and the piston 23 descends as described above, the piston 23 falls on the upper support 45 '(the bottom of the piston hole 45a'). ), The diaphragm 43 is deformed, and the lower abutment 44 'is lowered. When the piston 23 further descends, it comes into contact with the top of the play hole 44a 'of the lower abutment 44', and the valve body 3 descends. Thus, the needle portion 3b of the valve element 3 opens the valve port 13. As described above, in the second embodiment, the lower support 44 'comes into contact with the valve body 3, and the pressing force of the piston 23 is applied to the valve body 3 via the upper support 45', the diaphragm 43 and the lower support 44 '. The moment when it begins to join is the "valve opening point".

  As described above, the valve opening point in the valve device main body 10, that is, the moment when the lower abutment 44 'comes into contact with the valve body 3 is set so as to fall within the range of the "solid-liquid mixed expansion region". . Also in this embodiment, the valve opening point is set to a state where “valve opening lift = 0” and “thermo element lift = L2” shown in FIG.

  Also in the second embodiment, since the valve opening point is set within the range of the “solid-liquid mixed expansion area” where the thermal expansion coefficient of the thermal expansion body 2A in the thermoelement 20 is large, when the heat source reaches the set temperature. In addition, the valve port 13 can be quickly opened greatly, and the refrigerant can flow quickly. Thereby, the refrigerant can be quickly supplied to the cooling device (not shown) following the temperature change of the heat source, and as a result, the heat source can be rapidly cooled.

  According to the second embodiment, since the valve body 3 and the lower support 44 'are separated below the valve opening point, the weight of the upper support 45' and the lower support 44 'and the load of the fixed spring 46 are reduced. Since only the load of the coil spring 32 is applied to the valve body 3 without being transmitted to the valve body 3, the valve can be reliably closed.

  Although the thermoelement in the embodiment includes the rubber piston, the protection plate, and the fluid, these may not be provided. The thermoelement only needs to transmit the volume change of the thermal expansion body to the piston.

  Further, in the embodiment, the example in which the “sealing member” of the operation unit is configured by the diaphragm 43 has been described. However, as the “sealing member”, a structure that hermetically seals a structural unit including a lower support, a valve body, etc. Then, for example, a bellows or the like may be used.

  In the embodiment, the operating portion 4 includes the lower members (valve member-side members) 44 and 44 ′. However, there is no such lower member (valve member-side members), and the diaphragm 43 as a “sealing member” and the valve are provided. The body 3 may be configured to be in direct contact with the body 3.

  Further, in the embodiment, the operation unit 4 includes the upper support (piston side support) 45 and 45 ′, but there is no such support (piston side support), and the diaphragm 43 as a “sealing member” is provided. The structure may be such that the piston 23 is in direct contact with the piston 23.

  Further, in the embodiment, the piston 23 has a columnar shape capable of sliding on the cylindrical guide portion 22a. However, the piston is partially guided, and the piston is provided at the end on the diaphragm 43 side. The piston-side abutment that abuts a large area on the piston 42 may be integrally formed.

  Further, in the embodiment, the operating portion 4 includes the upper support (piston side support) 45 and 45 ′, but there is no such upper support (piston side support), and the operating portion is provided by the valve body 3 of the diaphragm 43. A configuration including only the lower abutment (valve body-side abutment) 44, 44 'disposed on the side may be employed.

  Further, in the embodiment, the operating unit 4 includes the lower support (valve body side support) 44 and 44 ′, but there is no lower support (valve body side support), and the operating unit is provided with the valve of the diaphragm 43. It is also possible to adopt a configuration that includes only the upper support (piston-side support) 45, 45 'arranged on the body 3 side.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and a design change or the like may be made without departing from the scope of the present invention. The present invention is also included in the present invention.

  For example, the valve body is not limited to the one in which the valve body contacts the valve seat around the valve port and completely closes the valve port.There is a gap or a flow path between the valve body and the valve seat, and there is a slight bleed flow rate. May be the case. That is, in the present invention, the “closed state” of the valve port is a concept including a case where the valve port is completely closed and a case where there is a bleed flow rate.

1 Valve Housing 1A Valve Chamber 11 First Port 12 Second Port 13 Valve Port 14 Guide Hole L Axis 21 Temperature Sensing Case 21a Temperature Sensing Part 21b Temperature Sensing Part Side Base 22 Guide Case 22a Guide Part 22b Guide Side Base 23 Piston 24 Diaphragm (Sealing member)
25 Rubber piston 26 Protective plate 2A Thermal expansion body 2B Fluid 3 Valve body 3a Valve rod 3b Needle part 3c Collar part 3a 'Valve rod 31 Spring receiver 32 Coil spring 4 Operating part 41 Lower lid 42 Upper case 42a Cylindrical part 43 Diaphragm 44 Lower allowance (valve side allowance)
45 Allowance (Piston side allowance)
46 Fixed spring 47 Coil spring 45a Play hole 45b Guide insertion hole 45c Spring accommodation hole 4 'Operation part 44' Lower support (valve body side support)
44a 'idle hole 45' top pad (piston side pad)
45a 'Piston hole 10 Valve body 20 Thermoelement 100 Temperature-sensitive control valve

Claims (9)

A thermo element for moving the piston in the axial direction by a volume change of the thermal expansion body which expands and contracts in accordance with a temperature change;
A valve device main body that opens and closes a valve port through which a refrigerant flows by a valve body, wherein a structure including the valve body is hermetically sealed by a sealing member, and the mechanical pressing force in the axial direction is applied to the sealing member. A valve device main body having an operation unit for transmitting to the valve body via
With
The valve port is configured to shift from a closed state to an open state by applying a mechanical pressing force due to the axial movement of the piston of the thermoelement to the valve body, and the pressing force is set to A temperature-sensitive control valve, wherein a valve opening point at which the valve body starts to be applied is set within a range of a solid-liquid mixed expansion area where the solid and liquid of the thermal expansion body are mixed and expanded.   The temperature-sensitive control valve according to claim 1, wherein the operation unit is configured so that the sealing member and the valve body come into direct contact with each other.   The temperature-sensitive control valve according to claim 1, wherein the operation unit is configured to directly contact the sealing member and the piston.   The temperature-sensitive control valve according to claim 3, wherein a piston-side abutment is integrally provided at an end of the piston on the sealing member side.   The said operation part is provided with the valve body side contact arrange | positioned at the said valve body side of the said sealing member, The said sealing member applies the said pressing force to the said valve body via the said valve body side contact. Item 2. The temperature-sensitive control valve according to Item 1.   The said operation part is provided with the piston side contact arrange | positioned at the said piston side of the said sealing member, The said piston applies the said pressing force to the said sealing member via the said piston side contact. 2. The temperature-sensitive control valve according to 1. The operation unit includes a piston-side abutment disposed on the piston side of the sealing member, and a valve-side abutment disposed on the valve body side,
The valve body-side abutment is configured to be in contact with the valve body when the valve is in a closed state, and the piston-side abutment is configured not to receive the pressing force from the piston. 2. The temperature-sensitive control valve according to item 1. The operation unit includes a piston-side abutment disposed on the piston side of the sealing member, and a valve-side abutment disposed on the valve body side,
2. The temperature according to claim 1, wherein when the valve is in a closed state, the piston-side abutment is configured to be in contact with the piston and the valve-body-side abutment is separated from the valve body. 3. Sensitive control valve.   The said thermoelement is provided with the temperature sensing part filled with the said thermal expansion body, The said temperature sensing part is provided in the said valve part main body by the side opposite to the said operation part, and provided. The temperature-sensitive control valve according to any one of claims 1 to 8.

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