JP7017482B2 - Temperature sensitive control valve - Google Patents

Description

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

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

Japanese Unexamined Patent Publication No. 2009-224406 Japanese Unexamined Patent Publication No. 2017-67164

In the technique of Patent Document 1, cooling is performed by cooling water (refrigerant), but in a device such as a server, the amount of heat generated greatly changes depending on the operating state. Therefore, when the heat source reaches the set temperature, it is required to immediately open the valve port wide and immediately flow the amount of the refrigerant required for cooling to cool the heat source quickly.

The present invention is provided in the refrigerant supply piping of a cooling device that cools a heat source that requires cooling, and when the heat source reaches a set temperature, the valve port is wide open to quickly supply the refrigerant. The challenge is to provide.

The temperature-sensitive control valve according to claim 1 is a temperature-sensitive control valve that controls the supply of a refrigerant to a cooling device that cools a heat source that requires cooling, and expands and contracts in response to a temperature change of the heat source. A thermo element that moves the piston in the axial direction by changing the volume of the thermal expansion body, and a valve device main body that controls the flow rate of the refrigerant by opening and closing the valve port through which the refrigerant flows in response to the temperature change. A valve device having an operating portion that seals a structural portion including the valve body with a sealing member and transmits a mechanical pressing force in the axial direction of the thermo element to the valve body via the sealing member. A main body is provided, and 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 thermo element to the valve body. The valve opening point at which the pressing force starts to be applied to the valve body is set within the range of the solid-liquid mixed expansion range in which the solid and liquid of the thermal expansion body are mixed and expanded.

The temperature-sensitive control valve according to claim 2 is the temperature-sensitive control valve according to claim 1, 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 such that the sealing member and the piston are in direct contact with each other. It is a feature.

The temperature-sensitive control valve according to claim 4 is the temperature-sensitive control valve according to claim 3, wherein a piston-side bearing is integrally provided at an end portion of the piston on the sealing member side. It is a feature.

The temperature-sensitive control valve according to claim 5 is the temperature-sensitive control valve according to claim 1, wherein the operation unit includes a valve body side fitting arranged on the valve body side of the sealing member, and said. The sealing member is characterized in that the pressing force is applied to the valve body via the valve body side pad.

The temperature-sensitive control valve according to claim 6 is the temperature-sensitive control valve according to claim 1, wherein the operating portion includes a piston-side bearing arranged on the piston side of the sealing member. The piston is characterized in that the pressing force is applied to the sealing member via the piston side pad.

The temperature-sensitive control valve according to claim 7 is the temperature-sensitive control valve according to claim 1, wherein the operating portion has a piston-side bearing arranged on the piston side of the sealing member and the valve. It is provided with a valve body side bearing arranged on the body side, and when the valve is closed, the valve body side bearing is brought into contact with the valve body and the piston side bearing is not subjected to the pressing force from the piston. It is characterized by being configured in.

The temperature-sensitive control valve according to claim 8 is the temperature-sensitive control valve according to claim 1, wherein the operating portion has a piston-side bearing arranged on the piston side of the sealing member and the valve. It is provided with a valve body side bearing arranged on the body side, and when the valve is closed, the piston side bearing is configured to be in contact with the piston and the valve body side bearing is separated from the valve body. It is characterized by being.

The temperature-sensitive control valve according to claim 9 is the temperature-sensitive control valve according to any one of claims 1 to 8, wherein the thermoelement includes a temperature-sensitive portion filled with the thermal expansion body. The temperature sensitive portion is provided so as to be exposed on the side opposite to the operation portion of the valve device main body.

According to the temperature-sensitive control valves of claims 1 to 9, the following effects can be obtained as an example. In the thermoelement, the thermal expansion rate of the thermal expansion body is extremely high in the "solid-liquid mixed expansion region" as compared with the "solid expansion region" and the "liquid expansion region". In the present invention, the valve opening point, which is the point where the piston of the thermo element starts to apply pressing force to the valve body, is set within the range of the "solid-liquid mixed expansion range" in which the thermal expansion rate of the thermal expansion body in this thermo element is large. Has been done. Therefore, when the heat source reaches a set temperature, the valve port can be quickly opened wide, and the refrigerant can be quickly supplied to the cooling device or the like to quickly cool the heat source.

Further, since the sealing member is provided, the thermo element is not in contact with the refrigerant due to the sealing member, so that the refrigerant does not infiltrate into the thermo element. Therefore, when there is no sealing member, there is a risk that the rubber piston or diaphragm of the thermoelement may swell or deteriorate due to the refrigerant, causing leakage of the thermal expander or 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 surely opened wide quickly, and the heat source can be cooled quickly.

According to the temperature-sensitive control valve of claim 9, 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 the metal plate or the like of the heat source. Therefore, the temperature of the heat source can be directly sensed, the responsiveness of the valve opening / closing operation can be improved, the temperature change of the heat source can be followed, and the heat source can be cooled quickly.

It is a vertical sectional view of the temperature sensitive control valve of 1st Embodiment of this invention. It is a top view of the temperature sensitive control valve of embodiment of this invention. It is a vertical sectional view of the thermoelement in the temperature sensitive control valve of embodiment of this invention. It is a figure which shows the temperature-displacement characteristic of the thermoelement in the temperature-sensitive control valve of embodiment of this invention. It is a vertical sectional view of the temperature sensitive control valve of the 2nd Embodiment of this invention.

Next, an embodiment of the temperature-sensitive control valve of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-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 vertical cross-sectional view of a thermoelement in the temperature-sensitive control valve. The concept of "upper and lower" in the following description corresponds to the upper and lower parts in the drawings of FIGS. 1 and 3. Further, in the following description, the temperature-sensitive control valve of the embodiment is appropriately referred to as a "control valve".

The control valve 100 of the embodiment is composed of a valve device main body 10 and a thermo element 20. The valve device main body 10 has a metal valve housing 1, and a columnar valve chamber 1A is formed in the center of the valve housing 1, and the refrigerant flows into the valve housing 1 by opening to the side portion of the valve chamber 1A. One port 11 is formed, and further, a second port 12 through which the refrigerant flows out is formed. Further, in the valve housing 1, a valve port 13 centered on the axis L is formed between the valve chamber 1A and the second port 12, and the second port from the upper part of the valve housing 1 is coaxial with the valve port 13. A guide hole 14 penetrating to 12 is formed. The guide hole 14 has a cylindrical shape with the axis L of the valve port 13 as the central axis. The refrigerant may flow in from the second port 12 and flow out from the first port.

A valve body 3 is arranged in the valve chamber 1A, the second port 12, and the guide hole 14. The valve body 3 is composed of a cylindrical rod-shaped valve rod 3a, a substantially conical needle portion 3b that opens and closes the valve port 13 from the valve chamber 1A side, and a flange portion 3c formed on the outer periphery of the needle portion 3b. There is. The valve rod 3a is inserted into the guide hole 14, and a coil spring 32 is arranged between the flange portion 3c and the spring receiver 31 at the bottom of the valve chamber 1A. As a result, the coil spring 32 urges the valve body 3 toward the diaphragm 43, which will be described later.

An operation unit 4 is attached to the side of the valve housing 1 opposite to the valve chamber 1A. The operation unit 4 is a diaphragm as a "sealing member" arranged between the lower lid 41 fixed to the valve housing 1, the upper case 42 having the same diameter as the lower lid 41, and the lower lid 41 and the upper case 42. 43, a lower allowance 44 as a "valve side allowance" arranged between the diaphragm 43 and the valve rod 3a of the valve body 3 in the lower lid 41, and an arrangement on the diaphragm 43 in the upper case 42. It is composed of an upper allowance 45 as a "piston side allowance". The lower lid 41, the diaphragm 43, and the upper case 42 are welded and integrally joined at the outer peripheral edge portion. As shown in the top view of FIG. 2, the valve housing 1 has a rectangular shape, but the upper case 42 (and the lower lid 41, the diaphragm 43) and the thermoelement 20 have a shape that is rotationally symmetric about the axis L. The diaphragm 43 is an annular shape made of a thin film metal, and has a flange surface on a plane at the outer peripheral portion and a planar contact surface at the center thereof that abuts the upper deposit 45 and the lower deposit 44 on each surface. It is formed, and 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 action surface that applies a mechanical pressing force in the L direction of the axis to the valve body 3 via the diaphragm 43.

The lower allowance 44 has a larger contact area of the lower allowance 44 with the diaphragm 43 than the area of the tip surface of the valve rod 3a on the diaphragm 43 side. As a result, as described later, when the diaphragm 43 is deformed by the action of the thermo element 20 and the pressing force is transmitted 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 allowance 44. On the other hand, it can be dispersed, and the durability of the diaphragm 43 can be improved. Similarly, in the upper deposit 45, the contact area of the upper deposit 45 with the diaphragm 43 is larger than the area of the tip surface of the piston 23 on the diaphragm 43 side, which will be described later. As a result, the pressing force can be dispersed and transmitted to the diaphragm 43 in a wider area of the upper deposit 45 than when the piston 23 directly abuts on the diaphragm 43, and the durability of the diaphragm 43 can be improved.

As a result, in the operation unit 4, the diaphragm 43 and the lower lid 41 hermetically seal the structural portion composed of the lower deposit 44 and the valve rod 3a, and from the outer portion of the diaphragm 43, that is, from the upper deposit 45 in the upper case 42. It has a function of transmitting the mechanical pressing force in the axis L direction to the valve body 3 (valve rod 3a) via the diaphragm 43 and the lower deposit 44. Then, the thermo element 20 (a part thereof) is housed in the cylindrical portion 42a of the upper case 42 of the operation portion 4, the temperature sensitive portion 21a of the thermo element 20 is exposed from the upper end of the upper case 42, and the thermo element is exposed. The locking piece 42a1 at the end of the cylindrical portion 42a is engaged with the end of the temperature-sensitive portion side base portion 21b of 20 on the temperature-sensitive portion 21a side.

The thermo element 20 is a thermo actuator that utilizes expansion and contraction of paraffin and the like due to temperature changes. As shown in FIG. 3, the thermo element 20 includes a temperature sensitive case 21, a guide case 22, a piston 23, a diaphragm 24, a rubber piston 25, and a protective plate 26. The temperature-sensitive case 21 is composed of a cylindrical temperature-sensitive portion 21a having a bottom at an end and a temperature-sensitive portion side base portion 21b that covers a part of the guide case 22. The guide case 22 is composed of a cylindrical guide portion 22a into which a piston 23, a rubber piston 25 and a protective plate 26 are inserted, and a guide side base portion 22b covered with a temperature sensing portion side base 21b of the temperature sensing case 21. There is.

The temperature-sensitive portion 21a of the temperature-sensitive case 21 is filled with a thermal expansion body 2A made of wax such as paraffin, and the lower end surface of the thermal expansion body 2A is sealed by a diaphragm 24 which is an elastic sealing member. There is. 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 the fluid 2B. The fluid 2B is an incompressible fluid having good fluidity and lubricity. The piston 23 is slidably inserted into the piston sliding hole 22a1 inside the guide portion 22a of the guide case 22 via the rubber piston 25 and the protective plate 26, and the outer end portion of the piston 23 is a piston slide. It protrudes from the moving hole 22a1.

When the environmental temperature of the temperature sensitive portion 21a rises, the thermal expansion body 2A expands and the diaphragm 24 swells, pushing down the fluid 2B enclosed in the fluid chamber below the diaphragm 24. As a result, the fluid 2B is deformed and a part thereof enters the piston sliding hole 22a1 of the guide portion 22a, and pushes the piston 23 downward through the rubber piston 25 and the protective plate 26.

As shown in FIG. 1, a play hole 45a, a guide insertion hole 45b, and a spring accommodating hole 45c are coaxially formed in the upper allowance 45, and the piston 23 of the thermoelement 20 faces the play hole 45a. The guide portion 22a is inserted into the guide insertion hole 45b. Further, a fixed spring 46 is arranged on the outer periphery of the guide portion 22a, and the fixed spring 46 is compressed and arranged between the temperature-sensitive portion side base portion 21b in the cylindrical portion 42a and the bottom portion of the spring accommodating hole 45c. Has been done. That is, since the end portion of the temperature-sensitive portion side base portion 21b is engaged with the locking piece 42a1 of the cylindrical portion 42a as described above, the thermoelement 20 is fixed to the cylindrical portion 42a by the spring force of the fixed spring 46. ing. Further, the temperature sensitive portion 21a of the thermo element 20 is exposed in a columnar shape, and has a structure that can be easily attached to a temperature sensing target. Then, the temperature sensitive portion 21a is mounted in the mounting hole 50a of the metal plate 50, and the heat from the metal plate 50 is transferred to the temperature sensitive 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 sensitive portion 21a of the thermo element 20 rises and the piston 23 descends as described above from the state of FIG. 1, the piston 23 comes into contact with the upper deposit 45 (the bottom of the play hole 45a). .. Further, when the piston 23 is lowered, the upper deposit 45 is lowered, the diaphragm 43 is deformed, the lower deposit 44 is lowered, and the valve body 3 in contact with the lower deposit 44 is further lowered. 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 deposit 45, the diaphragm 43 and the lower deposit 44 is the "valve opening point", and this valve 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 the relationship between the temperature of the temperature sensitive portion 21a in the thermoelement 20 and the displacement (lift) of the piston 23. The thermal expander 2A in the temperature sensitive portion 21a undergoes a phase change depending on 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. As a result, the temperature-displacement characteristics are divided into a "solid expansion region" that expands in the solid state, a "solid-liquid mixed expansion region" that expands in the solid-liquid mixed state, and a "liquid expansion region" that expands in the liquid state. Each has a different inclination. Then, the slope in the solid-liquid mixed expansion region, that is, the temperature expansion rate becomes the largest (steep). This temperature-displacement characteristic is known as an inherent characteristic of 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 to be within the range of the above-mentioned "solid-liquid mixing expansion region". In this embodiment, the valve opening point is set to the state of "valve opening lift = 0" and "thermo element lift = L2" shown in FIG. In this way, the valve opening point is set within the range of the "solid-liquid mixed expansion region" where the temperature expansion rate of the thermal expansion body 2A in the thermoelement 20 is large, so that when the heat source reaches the set temperature, the valve port 13 can be opened wide quickly. As a result, the refrigerant can be quickly supplied to a cooling device (not shown) according to the temperature change of the heat source, and as a result, the heat source can be quickly cooled.

In the thermo element 20, when the temperature of the temperature sensitive portion 21a drops and the thermal expansion body 2A contracts, a vacuum gap is formed in the thermal expansion body 2A solidified without the diaphragm 24 moving, or a fluid. There may be voids in 2B. Further, the diaphragm 24 may be deformed due to the contraction in the thermal expansion body 2A, and the fluid body 2B may also change its shape. In such a case, the piston 23 may be in a protruding state, and the rubber piston 25 and the protective plate 26 may be stopped on the piston 23 side, or only the rubber piston 25 may be in a state of moving following the fluid 2B. , The rubber piston 25 and the protective plate 26 may be in a state of moving following the fluid 2B. In either case, when the piston 23 protrudes and stays stationary, the piston 23 does not apply pressing force to the operation unit 4 (or valve body 3), which is different from the "valve opening point" in the present invention. It is a state.

In this first embodiment, the thermal expander 2A repeatedly expands and contracts due to the temperature change of the heat source, but if the temperature range is below the valve opening point, the diaphragm 43 is not displaced because the pressing force is not applied, and the diaphragm. The durability of 43 is improved.

FIG. 5 is a vertical cross-sectional view of the temperature-sensitive control valve of the second embodiment of the present invention, and in the second embodiment, the same elements as those of the first embodiment are designated by the same reference numerals as those of FIGS. 1 to 3. The duplicated explanation 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 unit 4'in the second embodiment, the lower allowance 44' as the "valve side allowance" is arranged in the lower lid 41 between the diaphragm 43 and the valve rod 3a'of the valve body 3, and is a coil. It is urged to the diaphragm 43 side by the spring 47. The lower deposit 44'has a play hole 44a', and the end portion of the valve rod 3a'is arranged in the play hole 44a'. Further, the valve rod 3a'is shorter than the valve rod 3a of the first embodiment. Further, the upper allowance 45'as the "piston side allowance" has a piston hole 45a'that is shallower than the play hole 45a in the first embodiment. Then, in the operation unit 4', as in the first embodiment, the diaphragm 43 and the lower lid 41 hermetically seal the structural portion composed of the lower deposit 44'and the valve rod 3a', and the outside of the diaphragm 43. 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 body 3 (valve rod 3a') via the diaphragm 43 and the lower pad 44'.

In this second embodiment, when the temperature of the temperature-sensitive portion 21a of the thermo element 20 rises and the piston 23 descends as described above from the state of FIG. 1, the piston 23 has an upper deposit 45'(the bottom portion of the piston hole 45a'). ), The diaphragm 43 is deformed and the lower deposit 44'is lowered. Further, when the piston 23 descends, it comes into contact with the top of the play hole 44a'of the lower deposit 44', and the valve body 3 descends. As a result, the needle portion 3b of the valve body 3 opens the valve port 13. As described above, in the second embodiment, the lower allowance 44'is in contact with the valve body 3, and the pressing force of the piston 23 is applied to the valve body 3 via the upper allowance 45', the diaphragm 43 and the lower allowance 44'. The moment when you start 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 deposit 44'contacts the valve body 3, is set to be within the range of the “solid-liquid mixing expansion region”. .. Also in this embodiment, the valve opening points are set to the states of "valve opening lift = 0" and "thermo element lift = L2" shown in FIG.

Also in this second embodiment, since the valve opening point is set within the range of the “solid-liquid mixed expansion region” in which the temperature expansion rate 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 opened wide quickly, and the refrigerant can flow quickly. As a result, the refrigerant can be quickly supplied to a cooling device (not shown) in accordance with the temperature change of the heat source, and as a result, the heat source can be quickly cooled.

According to this second embodiment, since the valve body 3 and the lower allowance 44'are separated from each other below the valve opening point, the weight of the upper allowance 45', the lower allowance 44', and the load of the fixed spring 46 can be applied. 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.

The thermoelement in the embodiment includes a rubber piston, a protective plate and a fluid, but these may be omitted. The thermoelement may be any one that transmits the volume change of the thermal expansion body to the piston.

Further, in the embodiment, an example in which the "sealing member" of the operation portion is composed of the diaphragm 43 has been described, but the "sealing member" includes a structure portion including a lower deposit and a valve body, which is hermetically sealed. If so, for example, bellows and the like may be used.

In the embodiment, the operation unit 4 includes a lower allowance (valve side allowance) 44, 44', but there is no lower allowance (valve side allowance), and the diaphragm 43 and the valve as a "sealing member" are provided. It may be configured so as to be in direct contact with the body 3.

Further, in the embodiment, the operation unit 4 is provided with an upper allowance (piston side allowance) 45, 45', but there is no upper allowance (piston side allowance), and the diaphragm 43 as a "sealing member" is used. It may be configured so that it comes into direct contact with the piston 23.

Further, in the embodiment, the piston 23 has a cylindrical shape so that the cylindrical guide portion 22a can be slid, but the piston is partially guided and the diaphragm is located at the end on the diaphragm 43 side. A piston-side bearing that abuts on the 42 over a wide area may be integrally formed.

Further, in the embodiment, the operation unit 4 is provided with an upper allowance (piston side allowance) 45, 45', but there is no upper allowance (piston side allowance), and the operation unit is the valve body 3 of the diaphragm 43. A configuration may be provided in which only the lower allowance (valve side allowance) 44, 44'arranged on the side is provided.

Further, in the embodiment, the operation unit 4 includes a lower allowance (valve side allowance) 44, 44', but there is no lower allowance (valve side allowance), and the operation unit is a valve of the diaphragm 43. It may be configured to include only the upper allowance (piston side allowance) 45, 45'arranged on the body 3 side.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention.

For example, not only the valve body abuts on the valve seat around the valve port and completely closes the valve port, but there is a gap or a flow path between the valve body and the valve seat, and there is a slight bleed flow rate. It may be the case. That is, in the present invention, the "closed state" of the valve port is a concept including the case where the valve port is completely closed and the case where there is a bleed flow rate.

1 Valve housing 1A Valve chamber 11 1st port 12 2nd port 13 Valve port 14 Guide hole L Axis line 21 Temperature sensitive case 21a Temperature sensitive part 21b Temperature sensitive 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 Flange part 3a ′ Valve rod 31 Spring receiver 32 Coil spring 4 Operation part 41 Lower lid 42 Upper case 42a Cylindrical part 43 Diaphragm 44 Lower allowance (valve side allowance)
45 Top allowance (piston side allowance)
46 Fixed spring 47 Coil spring 45a Play hole 45b Guide insertion hole 45c Spring accommodating hole 4'Operating unit 44'Lower allowance (valve side allowance)
44a'Play hole 45'Upper allowance (piston side allowance)
45a'Piston hole 10 Valve device body 20 Thermoelement 100 Temperature sensitive control valve

Claims (9)

A temperature-sensitive control valve that controls the supply of refrigerant to a cooling device that cools a heat source that requires cooling.
A thermo element that moves the piston in the axial direction by changing the volume of the heat-expanding body that expands and contracts according to the temperature change of the heat source.
The valve device main body that controls the flow rate of the refrigerant by opening and closing the valve port through which the refrigerant flows in response to the temperature change, and the structural portion including the valve body is hermetically sealed with a sealing member. A valve device main body having an operation unit for transmitting a mechanical pressing force in the axial direction of the thermo element to the valve body via the sealing member, and a valve device main body.
Equipped with
The valve port is configured to shift from the closed state to the open state by applying a mechanical pressing force due to the axial movement of the piston of the thermo element to the valve body, and the pressing force is the said. A temperature-sensitive control valve characterized in that the valve opening point at which it begins to join the valve body is set within the range of the solid-liquid mixed expansion region in which the solid and liquid of the thermal expansion body are mixed and expanded. The temperature-sensitive control valve according to claim 1, wherein the operating portion is configured so that the sealing member and the valve body are in direct contact with each other. The temperature-sensitive control valve according to claim 1, wherein the operating portion is configured such that the sealing member and the piston are in direct contact with each other. The temperature-sensitive control valve according to claim 3, wherein a piston-side bearing is integrally provided at an end of the piston on the sealing member side. The claim is characterized in that the operating portion includes a valve body side pad arranged on the valve body side of the sealing member, and the sealing member applies the pressing force to the valve body via the valve body side pad. Item 1. The temperature-sensitive control valve according to Item 1. The claim is characterized in that the operating portion includes a piston-side bearing arranged on the piston side of the sealing member, and the piston applies the pressing force to the sealing member via the piston-side bearing. The temperature-sensitive control valve according to 1. The operation unit includes a piston-side bearing arranged on the piston side of the sealing member and a valve body-side bearing arranged on the valve body side.
Claim 1 is characterized in that, when the valve is closed, the valve body side bearing is in contact with the valve body and the piston side bearing is configured so as not to receive the pressing force from the piston. The temperature sensitive control valve described in. The operation unit includes a piston-side bearing arranged on the piston side of the sealing member and a valve body-side bearing arranged on the valve body side.
The temperature according to claim 1, wherein when the valve is closed, the piston side allowance is in contact with the piston and the valve body side allowance is configured to be separated from the valve body. Sensitive control valve. The claim is characterized in that the thermo element includes a temperature sensitive portion filled with the thermal expansion body, and the temperature sensitive portion is provided so as to be exposed on a side opposite to the operation portion of the valve device main body. The temperature-sensitive control valve according to any one of 1 to 8.

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