CN114060566A

CN114060566A - Temperature regulating valve

Info

Publication number: CN114060566A
Application number: CN202010789127.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-02-18

Abstract

The invention discloses a temperature regulating valve, which comprises a thermal element and a limit wall, wherein the limit wall and a valve body are relatively fixed or limited, when a valve core closes a second valve port, a gap is formed between one end surface of the thermal element and the limit wall at a first position, when the temperature of lubricating oil rises, the gap between one end surface of the thermal element and the limit wall is eliminated firstly, at a second position, one end surface of the thermal element is not in a gap with the limit wall, then the thermal element deviates from the second valve port, and the second valve port is opened, which is equivalent to improving the valve opening temperature of the second valve port, further reducing the temperature difference between the second valve port and the second valve port when the valve is completely opened, and improving the control precision.

Description

Temperature regulating valve

Technical Field

The invention relates to the technical field of fluid control, in particular to a temperature regulating valve.

Background

In the running process of a vehicle, lubricating oil is needed for a gearbox to play a role in lubricating and cooling. When the temperature of lubricating oil in the gearbox is higher, the thermosensitive substance of the thermal element is heated and expanded, the lubricating oil directly flows back to the channel of the gearbox to be sealed or the flow area of the channel is reduced to cause flow reduction, and the high-temperature lubricating oil enters the external heat exchange device for cooling to be cooled and then flows back to the gearbox. On the contrary, when the temperature of the lubricating oil is lower, the thermosensitive substance of the thermal actuator starts to solidify and contract, the valve core is reset, and a channel for directly flowing the lubricating oil back to the gearbox is opened. As the temperature of the lubricant oil flowing through the thermostat valve increases, the thermal element of the thermostat valve operates, but the opening start temperature of the thermostat valve and the temperature at which the valve port is completely opened have a temperature difference, which further affects the control accuracy.

Disclosure of Invention

The purpose of the present application is to provide a temperature control valve that is advantageous for reducing the difference between the temperature at the time of starting the valve opening and the temperature at the time of fully opening the valve, and that improves the control accuracy.

The technical scheme of the application provides a temperature regulating valve, which comprises a valve body with a cavity, an end cover assembly, a thermal element and at least one spring, wherein the thermal element is installed in the cavity; the valve body is provided with a first port, a second port and a third port, the first port is communicated with the first cavity, and the third port is communicated with the second cavity; the spring comprises a first spring, at least a portion of the first spring being located in the second chamber, and at least a portion of the thermal element being located in the first chamber; one end of the thermal element is abutted or indirectly abutted with the first spring, and the thermal element can slide relative to the end cover assembly;

the end cover assembly comprises a limiting wall, the thermal element comprises a valve core, the temperature regulating valve is provided with a first valve port and a second valve port, and the temperature regulating valve comprises a first position and a second position; when the valve core closes the second valve port, a gap is reserved between one end face of the thermal actuator and the limiting wall at the first position along the axial direction of the valve body, and one end face of the thermal actuator is abutted to the limiting wall at the second position.

The temperature regulating valve provided by the above embodiment of the application comprises a valve body, a thermal element and an end cover assembly, wherein the end cover assembly and the valve body are relatively fixed or limited, when the valve core closes the second valve port, in a first position, a gap is formed between one end surface of the thermal element and a limiting wall formed on the end cover assembly, when the temperature of lubricating oil rises, the gap between the one end surface of the thermal element and the limiting wall is firstly eliminated, in a second position, the one end surface of the thermal element and the limiting wall are not in a gap, then the thermal element departs from the second valve port, and then the second valve port starts to be opened, which is equivalent to that the valve opening temperature of the second valve port is increased, so that the temperature difference between the second valve port starting to be opened from the second valve port and the second valve port valve completely opened is reduced, and the control precision is improved.

Drawings

FIG. 1 is a schematic perspective view of a thermostat valve according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a first embodiment of the trim valve of FIG. 1;

FIG. 3 is a schematic view of a first embodiment of the hot-working element of FIG. 2;

FIG. 4 is a schematic structural view of the end cap of FIG. 2;

FIG. 5 is a schematic cross-sectional view of a second embodiment of the trim valve of FIG. 1;

FIG. 6 is a schematic structural view of the spring seat of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a third embodiment of the trim valve of FIG. 1;

FIG. 8 is a schematic structural view of the end cap of FIG. 7;

FIG. 9 is a schematic view of the construction of the heat transfer element of FIG. 7;

FIG. 10 is a schematic view of the thermostat valve of FIG. 1 without the second spring;

FIG. 11 is a schematic structural view of another embodiment of an end cap of a trim valve;

FIG. 12 is a schematic diagram of a thermal element including a first boss.

Detailed Description

In the following, referring to the drawings and the detailed description, the technical scheme of the present invention is specifically described as follows, the limiting wall includes a first limiting wall and a valve rod limiting wall, the limiting wall corresponding to the first end surface of the body is defined as the first limiting wall, and the limiting wall corresponding to the end surface of the valve rod is defined as the valve rod limiting wall. Fig. 1 to 4 are schematic structural views of the first embodiment.

The temperature regulating valve comprises a valve body 1, a first spring 31, an end cover assembly and a thermal actuator 2, wherein the valve body 1 is provided with a cavity 10, the thermal actuator is positioned in the cavity 10, the cavity 10 is provided with a port 100 on the outer wall surface of the valve body, the end cover assembly enters from the port 100 of the cavity 10 and is accommodated in the cavity 10, and the end cover assembly is in limit connection or fixed with the valve body 1. In a specific embodiment, the temperature regulating valve comprises a clamping ring 51, the clamping ring 51 is clamped into a groove formed in the valve body 1, so that the end cover assembly cannot move continuously towards the clamping ring 51 and is separated from the groove, the valve body further comprises a limiting step 110, the end cover assembly is abutted against the limiting step 110, so that the end cover assembly cannot move towards the cavity 10, and therefore relative limiting of the end cover assembly is achieved. One end of the thermal element 2 is limited by the end cover assembly, and the other end of the thermal element 2 is supported by the first spring 31 to realize the limitation. The valve body 1 has a first port 11, a second port 12, and a third port 13, and the first port 11, the second port 12, and the third port 13 can communicate with the outside. The cavity 10 comprises a first cavity 101 and a second cavity 102, the aperture of the second cavity 102 is smaller than that of the first cavity 101, the second cavity 102 is far away from the end cover assembly relative to the first cavity 101, the first port 11 is communicated with the first cavity 101, the valve body 1 comprises a first step part, the first step part is used as a first valve seat 15 of the temperature regulating valve, the first valve seat 15 forms a first valve port 150, and the first valve seat 15 is located between the first port 11 and the third port 13 along the axial direction of the valve body 1. The thermal actuator 2 is capable of operating in the first chamber 101, with a gap between the thermal actuator 2 and the inner wall of the valve body 1 through which the lubricating oil passes. The valve body 1 further comprises a second step 16 located at the bottom of the second chamber, at least part of the first spring 31 is located in the second chamber 102, specifically, one end of the first spring 31 abuts against the second step 16, and the other end of the first spring 31 abuts against the thermal element 2. The thermal actuator 2 comprises a body 22 and a first valve core 21, the outer diameter of the first valve core 21 is larger than the outer diameter of the body 22 and larger than the caliber of the first valve port 150, the first valve core 21 can close the first valve port 150, one end of a first spring 31 is abutted against the lower end surface of the first valve core 21, in order to prevent the first spring 31 from deviating, a spring limiting part 26 is further arranged on one side of the thermal actuator 2 relatively close to the first valve port 150, the spring limiting part 26 is positioned in the first spring 31, and in the embodiment, the spring limiting part 26 is a part of the body 22; in other embodiments, the first spool 21 may be part of the body 22. When the first port 150 is closed, the lower end surface of the first valve body 21 abuts against the first valve seat 15.

Please refer to fig. 2-4. The end cap assembly includes a receiving portion including a first receiving portion 400, the end cap assembly includes an end cap 4, the first receiving portion 400 is formed at the end cap 4, the first receiving portion 400 has a first receiving chamber 401, the first receiving chamber 401 has a mouth facing the thermal element 2, a bottom wall of the first receiving portion 400 is formed as a valve stem stopper wall 402, and in the present embodiment, the valve stem stopper wall 402 faces the first receiving chamber 401. The thermal element 2 comprises a valve rod 24 and a heat sensitive substance filled in the thermal element, the heat sensitive substance can generate volume change along with temperature change, the volume change of the heat sensitive substance can push the valve rod 24 to move relative to the body 22, the valve rod 24 is closer to the end cover 4 than the spring limiting part 26, part of the valve rod 24 is positioned in the first accommodating cavity 401, when the valve rod 24 moves towards the end cover 4, the end surface 241 of the valve rod 24 is contacted with the valve rod limiting wall 402, the valve rod limiting wall 402 can prevent the valve rod 24 from continuing to move towards the end cover 4, and the valve rod 24 is closer to the first spring 31 than the valve rod limiting wall 402. The end cap 4 includes a main body 41, a second valve seat 44, and a first connecting portion 43, the main body 41 is provided with at least one groove 411, the groove 411 is used for accommodating a sealing member 53, so that the main body 41 and the valve body 1 are sealed at the joint of the two, of course, the groove 411 may be provided in the valve body 1, the sealing member 53 is provided between the end cap 4 and the valve body 1, and the sealing performance between the end cap 4 and the valve body 1 can be improved, in this embodiment, the first accommodating chamber 401 is formed in the main body 41. The first connecting parts 43 are at least two columnar structures, the gap between adjacent columnar structures is a lubricating oil channel, and the second connector 12 is communicated with the gap between adjacent first connecting parts 43; the second valve seat 44 has a substantially annular configuration, and the body portion 41 and the second valve seat 44 are connected by the first connection portion 43, but in the present embodiment, the second valve seat 44 forms the second valve port 160, and the thermal element 2 can abut against the lower end surface of the second valve seat 44, thereby sealing the second valve port 160. The peripheral wall of the second valve seat 44 contacts the wall forming the chamber 10 to effect a seal therebetween at the junction.

In the present embodiment, the axial direction of the valve body 1 refers to a direction that is the same as or parallel to the axial direction of the thermal element 2, and the axial direction of the valve body 1 may be the operating direction of the thermal element 2. The second valve seat 44 is located between the first port 11 and the second port 12 along the axial direction of the valve body 1, and when the thermal valve 2 opens the second port 160, a flow passage between the first port 11 and the second port 12 is opened. Specifically, in the axial direction of the valve body 1, the communication of the first port 11 with the first chamber 101 is located on one side of the second valve seat 44, the communication of the second port 12 with the first chamber 101 is located on the other side of the second valve seat 44, and the communication of the first port 11 with the first chamber 101 is located between the second valve seat 44 and the first valve seat 15. In addition, the aperture of the first accommodation chamber 401 is larger than the outer diameter of the valve stem 24 by about 0.05 to 0.5 mm.

The body 22 further includes a second valve element 23, the second valve element 23 is formed on an outer wall portion of the body 22, and the second valve element 23 is not limited to a side wall portion of the body 22 and may include an upper wall relatively close to a side portion of the stem 24.

The valve body 1 also has a third chamber 103 and a fourth chamber 104, the second step 16 being located at the bottom of the fourth chamber 104, the second step 16 being intended to carry the first spring 31. The axial direction of the third chamber 103 is substantially perpendicular to the axial direction of the valve body 1, the third port 13 communicates with the third chamber 103, and the fourth chamber 104 communicates with the third chamber 103, specifically, the fourth chamber 104 has an opening in the wall forming the third chamber 103, and then the fourth chamber 104 communicates with the third chamber 103. In addition, the valve body 1 further has a fourth port 14, the fourth port 14 is communicated with the third chamber 103, and the fourth port 14 is used for communicating with the outside.

When the temperature adjusting valve is provided with four interfaces, the first interface 11 is communicated with an oil path outlet of the gearbox, the second interface 12 is communicated with an inlet of the heat exchanger, the third interface 13 is communicated with an outlet of the heat exchanger, the heat exchanger is used for cooling lubricating oil of the gearbox, and the fourth interface 14 is communicated with an oil path inlet of the gearbox. When the temperature of the lubricant in the transmission is low, such as less than the first set value, the thermal sensitive substance in the thermal element contracts, and the body 22 moves toward the second valve port 160 until the second valve spool 231 abuts against the second valve seat 44 to close the second valve port 160, at which time the first valve port 150 is opened, and a gap is formed between the end surface 241 of the valve stem and the valve stem limiting wall 402, which is defined as the first position of the thermostat valve. The flow path of the lubricating oil is illustrated by the dashed arrows in fig. 2: the lubricating oil of the gearbox enters the temperature regulating valve from the first port 11 to the first cavity 101, and then flows back to the gearbox through the first valve port 150, the second cavity 102, the third cavity 103 and the fourth port 14, and the lubricating oil does not undergo cooling by the heat exchanger. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive substance in the thermal actuator 2 is heated to expand, because a gap is formed between the valve rod 24 and the valve rod limiting wall 402, the body 22 does not move before the end surface of the valve rod 24 is not contacted with the valve rod limiting wall 402, the second valve core 23 still closes the second valve port 160, the first valve port 150 is still in an open state, as the temperature of the lubricating oil continues to rise, when the temperature of the lubricating oil is greater than a second set value, the end surface of the valve rod 24 is contacted with the valve rod limiting wall 402, which is defined as a second position of the temperature regulating valve, if the temperature of the lubricating oil continues to rise, the body 22 moves towards the first valve port 150 due to the blockage of the valve rod limiting wall 402 until the first valve core 21 is matched with the first valve seat 15 to block the first valve port 150, the lubricating oil enters the first cavity 101 of the temperature regulating valve from the first port 11 and then passes through the second valve port 160, The second connector 12 enters the heat exchanger for heat dissipation, and the lubricating oil after heat dissipation and cooling flows back to the gearbox from the outlet of the heat exchanger through the third connector 13 and the third cavity 103 and through the fourth connector 14; if the temperature of the lubricating oil is further increased, the heat-sensitive substance expands, and the body 22 further moves towards the first valve port 150, so that the opening degree of the second valve port 160 is increased, the cooling speed of the lubricating oil entering the heat exchanger is increased, and the temperature of the lubricating oil can be rapidly reduced. Compared with the situation that the end surface of the valve rod 24 is in contact with the valve rod limiting wall or has no gap, the gap between the end surface 241 of the valve rod and the valve rod limiting wall 402 is arranged, so that the temperature of the lubricating oil when the second valve port 160 is initially opened is increased, the temperature difference when the second valve port 160 is initially opened to be fully opened is relatively reduced, and the second valve port can be initially opened to be fully opened by the temperature regulating valve in a relatively small temperature range. If the thermostat valve has three connections, the lubricant flowing out of the heat exchanger does not pass through the third chamber 103 and directly enters the gearbox, which will not be described in detail.

Referring to another embodiment, as shown in fig. 5 to 6, the end cap assembly includes an end cap 4 ', a spring seat 54, a first retaining ring 52, and a second spring 32, the end cap 4' is provided with a first accommodating cavity 401 ', the spring seat 54 and the second spring 32 are located in the first accommodating cavity 401', at least a portion of the first retaining ring 52 is located in a groove formed in the end cap 4 ', the spring seat 54 is limited in the first accommodating cavity 401' by the first retaining ring 52, one end of the second spring 32 abuts against the bottom wall of the first accommodating portion 400, and the other end of the second spring 32 abuts against the spring seat 54. The accommodating portion includes a second accommodating portion 541, the spring seat 54 includes a sliding portion 542, the second accommodating portion 541 is formed in the spring seat 54, the second accommodating portion 541 has a second accommodating cavity 5410, the second accommodating cavity 5410 can accommodate a part of the valve rod 24, the end surface 241 of the valve rod 24 has a gap with the bottom wall 5411 of the second accommodating portion 541, and the outer peripheral wall of the sliding portion 542 can slide relative to the inner wall of the end cover 4'. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive substances in the thermal actuator 2 expand by heating, before the end surface 241 of the valve stem is not in contact with the bottom wall 5411 of the second accommodation part 541, the body 22 is not operated, at this time, the second valve spool still blocks the second valve port 160, the first valve port 150 is still in an open state, as the temperature of the lubricating oil continues to rise, the end surface 241 of the valve stem 24 contacts with the bottom wall 5411 of the second accommodation portion 541, since the elastic force of the second spring 32 is greater than the elastic force of the first spring 31, the body 22 moves toward the first port 150 until the first valve element 21 closes the first port 150, and the second valve port 160 is opened, the lubricating oil enters the first cavity 101 of the temperature regulating valve from the first connector 11, enters the heat exchanger through the second valve port 160 and the second connector 12 for heat dissipation, and the lubricating oil after heat dissipation and cooling flows back to the gearbox from the heat exchanger through the third connector 13, the third cavity 103 and the fourth connector 14. If the temperature rises further, the heat sensitive substance expands and the body 22 moves further in the direction of the first valve port 150, so that the opening degree of the second valve port 160 increases. In the present embodiment, the valve-stem stopper wall is a bottom wall of the second housing portion.

Of course, referring to fig. 10 and 6, the temperature regulating valve may not be provided with the second spring 32, the valve rod 24 contacts with the bottom wall of the second accommodating portion 541, a gap is formed between the upper wall of the second accommodating portion 541 and the bottom wall of the first accommodating portion 400, when the upper wall of the second accommodating portion 541 and the bottom wall of the first accommodating portion 400 do not contact, the second valve port 160 is closed, when the temperature of the lubricating oil further increases, the upper wall of the second accommodating portion 541 contacts with the bottom wall of the first accommodating portion 400, and the main body 22 moves toward the first valve port 150. In the present embodiment, the bottom wall of the first housing portion 400 is a valve stem stopper wall.

In another embodiment, the temperature control valve may be provided with the second spring 32, the valve rod 24 contacts the bottom wall of the second housing portion 541, the volume of the expanded material increases with the increase in the temperature of the lubricating oil, the valve rod operates, when the second valve port 160 is closed, the elastic force of the second spring 32 is smaller than the elastic force of the first spring 31, the second housing portion compresses the second spring 32, the main body 22 does not operate, and after the upper wall of the second housing portion 541 abuts the bottom wall of the first housing portion 400, the thermal element 2 operates toward the first valve port 150, and finally the first valve port 150 is closed.

Referring to fig. 7-9, in the present embodiment, the second valve seat 44 has a first hole 442 and a second hole 443, the first hole 442 has an opening at a bottom wall 444 of the second valve seat, and the first hole 442 forms the second valve port 160; the first bore 442 has a larger bore diameter than the second bore 443, the first bore 442 communicates with the second bore 443, the second bore 443 has an opening in the upper wall of the second valve seat 44, and in this embodiment, the first stopper wall 441 is a bottom wall forming the first bore 442. The body 22 includes the second valve element 23 and a first end surface 25, the second valve element 23 is formed on the peripheral wall of the body 22, the first end surface 25 is closer to the second valve seat 44 than the second valve element 23, the first end surface 25 faces the end cover 4, when the second valve element 23 closes the second valve port 160, at least a part of the second valve element 23 is located in the first hole 442, a gap is formed between the first end surface 25 and the first limit wall 441 along the axial direction of the valve body 1, and the first end surface 25 is located in the first hole 442. The inner diameter of the first bore 442 is matched with the outer diameter of the second spool 23 such that the second spool 23 can close the second port 160, or the flow rate of the lubricating oil between the second spool 23 and the second port 160 is smaller than a predetermined value when the second spool 23 is located at the second port 160, and in this embodiment, the second spool 23 refers to a side wall of the thermal actuator and does not include an end wall. To ensure that the second valve core 23 can act in the second valve port 160, the inner diameter of the second valve seat 44 may be slightly larger than the second valve core 23, specifically, the inner diameter of the second valve seat 44 is 0.01-0.05mm larger than the outer diameter of the second valve core 23, so that the two can realize sealing and sliding fit.

When the temperature of the lubricant in the transmission is low, such as the temperature of the lubricant flowing through the thermostat valve is lower than the first set value, the second valve element 23 is located in the second valve port 160, and the first end surface 25 and the first limiting wall 441 have a gap in the axial direction of the valve body 1, which is defined as the first position of the thermostat valve, when the second valve element 23 closes the second valve port 160 and the first valve element 21 opens the first valve port 150. The lubricating oil enters the first cavity 101 of the temperature regulating valve from the first port 11 and then flows back to the gearbox through the first valve port 150, the second cavity 102, the third cavity 103 and the fourth port 14, and at the moment, the lubricating oil is not cooled by the heat exchanger. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive substance in the thermal actuator 2 is heated and expanded, because the valve rod 24 contacts with the bottom wall of the first accommodating part 541, before the first end face 25 does not contact with the first limit wall 441, the thermal actuator 2 moves towards the first limit wall 441, at this time, the second valve core 23 still seals the second valve port 160, the first valve port 150 is still in an open state, as the temperature of the lubricating oil continues to rise, if the temperature of the lubricating oil flowing through the temperature regulating valve is greater than a second set value, the first end face 25 contacts with the first limit wall 441, which is defined as a second position, then the body 22 of the thermal actuator moves towards the first valve port 150 until the first valve core 21 closes the first valve port 150, the lubricating oil enters the first cavity 101 of the temperature regulating valve from the first port 11, then flows out through the second valve port 160 and the second port 12, enters a heat exchanger of the system for heat dissipation, and the lubricating oil after heat dissipation and cooling flows back to the gearbox through the third port 13, the third cavity 103 and the fourth port 14. The gap between the first end surface 25 and the first limiting wall 441 reduces the temperature difference between the first opening and the full opening of the second valve port 160, that is, the temperature regulating valve can be opened from the first opening to the full opening within a relatively small temperature range. It can be seen that, in the first position, and between the first position and the second position, and in the second position, the second spool is located in the first hole, and when moving from the first position to the second position, the gap between the first end surface and the first stopper wall becomes smaller.

Referring to fig. 11 and 12, the difference from the above embodiment is that the thermal element 2 includes a first protrusion 26, or the first protrusion 26 is a part of the thermal element 2, and the outer diameter of the first protrusion 26 is larger than that of the body 22. A first end surface 25 'is formed on the upper wall of the first boss 26, the first end surface 25' faces the second valve seat 44, the first end surface 25 'is farther from the second valve seat 44 than the second valve element 23, and a first stopper wall 441' is formed on the bottom wall of the second valve seat 44; when the temperature of the lubricating oil in the transmission is low, the second valve core 23 is positioned in the second valve port 160, and a gap is formed between the first end surface 25 'and the first limit wall 441' in the axial direction of the valve body 1, and the second valve core 23 closes the second valve port 160. The lubricating oil enters the temperature regulating valve from the first port 11 to the first cavity 101, and then flows back to the gearbox through the first valve port 150 via the second cavity 102, the third cavity 103 and the fourth port 14 without being cooled by a heat exchanger. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive substance in the thermal actuator 2 is heated to expand, before the first end surface 25 'is not contacted with the first limit wall 441', the thermal actuator 22 moves towards the second valve seat 44, at this time, the second valve spool still seals the second valve port 160, the first valve port 150 is still in an open state, as the temperature continues to rise, the first end surface 25 'is contacted with the first limit wall 441', the body 22 moves towards the first valve port 150 until the first valve spool 21 closes the first valve port 150, the lubricating oil enters the first cavity 101 of the temperature regulating valve from the first port 11, then flows out through the second valve port 160 and the second port 12, enters a heat exchanger of the system for heat dissipation, and the lubricating oil after heat dissipation and cooling flows back to the gearbox through the third port 13, the third cavity 103 and the fourth port 14. The gap between the bottom wall of the second valve seat 44 and the first protrusion 26 reduces the temperature difference between the first opening and the full opening of the second valve port 160, i.e., the temperature regulating valve can realize the first opening and the full opening of the second valve port in a relatively small temperature range.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can now make numerous changes and modifications to the disclosed embodiments, and equivalents thereof, without departing from the scope of the invention as set forth in the claims below. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A thermostatic valve comprising a valve body having a chamber, an end cap assembly, a thermal element mounted within the chamber, and at least one spring, the end cap assembly being fixed or retained relative to the valve body, the chamber comprising a first chamber and a second chamber, the second chamber being remote from the end cap assembly relative to the first chamber; the valve body is provided with a first port, a second port and a third port, the first port is communicated with the first cavity, and the third port is communicated with the second cavity; the spring comprises a first spring, at least a portion of the first spring being located in the second chamber, and at least a portion of the thermal element being located in the first chamber; one end of the thermal element is abutted or indirectly abutted with the first spring, and the thermal element can slide relative to the end cover assembly;

2. The thermostat valve of claim 1, wherein the spool includes a first spool and a second spool, the first spool cooperating with the first port, the second spool cooperating with the second port, the thermostat valve including a first valve seat having the first port and a second valve seat between the first port and the third port; the thermal element comprises a body, one end of the body is abutted or indirectly abutted with the first spring, and the second valve seat is positioned between the first port and the second port of the valve body.

3. A trim valve according to claim 2, wherein the body comprises a first end face, the second spool being formed in the body; the second valve seat is located between the first port and the second port along the axial direction of the valve body, the second valve seat comprises a first hole, the first hole has an opening at the bottom wall of the second valve seat, the first hole is the second valve port, the limiting wall comprises a first limiting wall, the first limiting wall is formed on the second valve seat, and when the second valve core closes the second valve port, a gap is formed between the first end surface and the first limiting wall in the first position.

4. A thermostat valve according to claim 3, wherein the second valve seat has a second hole, the first hole has a larger hole diameter than the second hole, the second hole has a port at the first stopper wall facing the first hole, the first hole communicates with the second hole, the second hole has an opening at an upper wall of the second valve seat, and a part of the thermal element is located at the second hole;

the first end surface is closer to the second hole than the second valve core, and the first end surface is located in the first hole when the second valve core closes the second valve port.

5. The thermostat valve according to claim 3, wherein the thermal element includes a first boss having an outer diameter larger than an outer diameter of the second valve element, the first end surface being formed on an upper wall of the first boss, the first end surface facing the second valve seat; the first limiting wall is formed on the bottom wall of the second valve seat;

the first end surface is farther from the second valve seat than the second valve core, and when the second valve core closes the second valve port, the first end surface and the bottom wall of the second valve seat have a gap in the first position.

6. The thermostat valve according to claim 4 or 5, wherein in both the first position and the second position, the second spool is located in the first aperture, the second spool closing the second port; the second spool is movable from the first position to the second position at the second port.

7. A thermostat valve according to claim 2 wherein the thermal element comprises a valve stem and a body, one end of the body abutting or indirectly abutting the first spring; the end cap assembly comprises a containing part, the containing part is provided with a containing cavity, the containing part comprises a valve rod limiting wall, the end face of the valve rod is positioned in the containing cavity, and the valve rod is closer to the first spring than the valve rod limiting wall;

the thermal valve comprises a valve core, the temperature regulating valve is provided with a first valve port and a second valve port, and when the valve core closes the second valve port, a gap is formed between the end surface of the valve rod and the valve rod limiting wall at the first position along the axial direction of the valve body.

8. The trim valve of claim 7, wherein the end cap assembly includes an end cap, the end cap is fixed or retained with the valve body, the end cap includes a body portion, a first connecting portion and the second valve seat, at least a portion of the body portion is farther from the first port than the second port, a side wall of the body portion is sealingly disposed between an inner wall of the valve body, the first connecting portion connects the body portion and the second valve seat with a gap therebetween, a side wall of the second valve seat is sealingly disposed between an inner wall of the valve body, and at least a portion of the first connecting portion is located between the second port and the second valve seat in an axial direction of the valve body;

the end cover comprises a first accommodating part, and the first accommodating part is provided with a first accommodating cavity; the thermal element comprises a valve rod, the valve rod protrudes towards the end cover relative to the body, and the end face of the valve rod is located in the first accommodating cavity.

9. The thermostat valve according to claim 8, wherein the accommodating portion includes a first accommodating portion formed in the body portion, the first accommodating portion having a first accommodating chamber having an opening facing the second valve seat, an end surface of the valve stem being located in the first accommodating chamber, and a bottom wall of the first accommodating portion being formed as the valve stem stopper wall.

10. Tempering valve according to claim 9, characterized in that said housing comprises a second housing; the end cover assembly comprises a spring seat, the end cover assembly comprises a first check ring, the spring seat is limited by the first check ring in the first accommodating part, the spring seat comprises a sliding part and a second accommodating part, the sliding part can slide relative to the first accommodating part, the second accommodating part is provided with a second accommodating cavity, the second accommodating cavity is provided with an opening facing the second valve seat, the end face of the valve rod is located in the second accommodating cavity, and the valve rod is fixedly arranged or can slide relative to the second accommodating part.

11. The thermostat valve as claimed in claim 11, wherein the end cap assembly includes a second spring located in the first housing chamber, one end of the second spring abutting the spring seat, the other end of the second spring abutting the bottom wall of the first housing portion; when the valve core closes the second valve port, the deformation force of the second spring is smaller than that of the first spring.

12. The thermostat valve according to claim 8, wherein the accommodating portion includes a first accommodating portion and a second accommodating portion, the first accommodating portion being formed at the body portion, the first accommodating portion having a first accommodating chamber having an opening toward the second valve seat;

the end cover assembly comprises a spring seat and a second spring, the spring seat and the second spring are located in the first accommodating cavity, one end of the second spring is abutted to the spring seat, the other end of the second spring is abutted to the bottom wall of the first accommodating part, the end cover assembly comprises a first check ring, and the spring seat is limited in the first accommodating part through the first check ring; the second accommodating part is formed in the spring seat, the spring seat further comprises a sliding part, the outer side wall of the sliding part is arranged in a clearance with the side wall of the first accommodating part, the second accommodating part is provided with a second accommodating cavity, the second accommodating cavity is provided with an opening facing the second valve seat, the end surface of the valve rod is located in the second accommodating cavity, and the bottom wall of the second accommodating part forms the valve rod limiting wall; when the valve core closes the second valve port, the deformation force of the second spring is larger than that of the first spring.

13. The thermostat valve according to claim 7, 11 or 12, wherein when the temperature of the lubricating oil flowing through the thermostat valve is lower than a first set value, and the spool closes the second valve port, a gap is formed between the end surface of the valve stem and the valve stem limiting wall along the axial direction of the valve body;

when the temperature of the lubricating oil flowing through the temperature regulating valve is higher than a second set value, no clearance exists between the end surface of the valve rod and the valve rod limiting wall or the valve rod is limited relative to the limiting wall, the valve core closes the first valve port and opens the second valve port;

and when the temperature of the lubricating oil flowing through the temperature regulating valve is less than or equal to a second set value and greater than or equal to the first set value, the clearance between the end surface of the valve rod and the valve rod limiting wall is reduced.

14. A thermostat valve according to claim 1, 3 or 5, characterized in that the limiting wall comprises a first limiting wall, when the temperature of the lubricating oil flowing through the thermostat valve is lower than a first set value, and when the second valve spool closes the second valve port, the first valve spool opens the first valve port, and a gap is formed between the first end surface and the first limiting wall along the axial direction of the valve body;

when the temperature of the lubricating oil flowing through the temperature regulating valve is larger than a second set value, no gap is formed between the first end surface and the limiting wall, the second valve core closes the second valve port, and the first valve core opens the first valve port;

when the temperature of the fluid flowing through the temperature regulating valve is smaller than or equal to a second set value and larger than or equal to a first set value, the gap between the first end face and the first limiting wall is smaller, and the thermal element moves towards the direction of the end cover assembly.