tempering valve

Abstract

The application discloses a temperature regulating valve, which comprises a thermal element and a limiting wall. When a valve core closes a second valve port, a gap exists between one end surface of the thermal element and the limiting wall in a first position. When the temperature of lubricating oil rises, the gap between the one end surface of the thermal element and the limiting wall is eliminated first, and then the thermal element deviates from the second valve port in a second position, and the second valve port is opened. The opening temperature of the second valve port is increased, the temperature difference between the opening of the second valve port and the complete opening of the second valve port is reduced, and the control precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid control, in particular to a temperature regulating valve. BACKGROUND

[0002] During driving, the transmission needs lubricating oil to play the function of lubrication and cooling. When the temperature of the lubricating oil in the transmission is high, the heat-sensitive substance of the thermal element expands, the passage through which the lubricating oil directly flows back to the transmission is blocked or the flow area of the passage is reduced, and the high-temperature lubricating oil enters the external heat exchange device for cooling and then flows back to the transmission. Conversely, when the temperature of the lubricating oil is low, the heat-sensitive substance of the thermal element begins to solidify and shrink, the valve core resets, and the passage through which the lubricating oil directly flows back to the transmission is opened. As the temperature of the lubricating oil flowing through the temperature regulating valve rises, the thermal element of the temperature regulating valve acts, but there is a temperature difference between the temperature at which the temperature regulating valve starts to open and the temperature at which the valve port is fully opened, which affects the control accuracy. SUMMARY

[0003] The purpose of the present application is to provide a temperature regulating valve to reduce the temperature difference between the start of opening and the full opening of the valve and improve the control accuracy.

[0004] The technical scheme of the present application provides a temperature regulating valve, which comprises a valve body having a cavity, an end cover assembly, a thermal element installed in the cavity, and at least one spring. The end cover assembly is fixed or limited relative to the valve body. The cavity comprises a first cavity and a second cavity, and the second cavity is away from the end cover assembly relative to the first cavity. The valve body has a first interface, a second interface, and a third interface. The first interface is in communication with the first cavity, and the third interface is in communication with the second cavity. The spring comprises a first spring, at least part of which is located in the second cavity, and at least part of the thermal element is located in the first cavity. One end of the thermal element abuts or indirectly abuts the first spring, and the thermal element can slide relative to the end cover assembly.

[0005] The end cover assembly comprises a limiting wall, the thermal element comprises a valve core, the temperature regulating valve has a first valve port and a second valve port, the temperature regulating valve comprises a first valve seat and a second valve seat, the first valve seat has the first valve port, and the second valve seat forms the second valve port. The first valve seat is located between the first interface and the third interface of the valve body, and the second valve seat is located between the first interface and the second interface of the valve body. The temperature regulating valve comprises a first position and a second position. When the valve core closes the second valve port, along the axial direction of the valve body, there is a gap between one end face of the thermal element and the limiting wall in the first position, and one end face of the thermal element abuts the limiting wall in the second position.

[0006] The temperature regulating valve provided by the above-mentioned embodiment of the present application comprises a valve body, a thermal element and an end cover assembly, the end cover assembly is fixed or limited relative to the valve body, when the valve core closes the second valve port, at the first position, there is a gap between one end face of the thermal element and the limiting wall formed in the end cover assembly, when the temperature of the lubricating oil increases, the gap between the one end face of the thermal element and the limiting wall is first eliminated, at the second position, there is no gap between the one end face of the thermal element and the limiting wall, and then the thermal element deviates from the second valve port, and then the second valve port is started to be opened, which is equivalent to increasing the opening temperature of the second valve port, and then reducing the temperature difference between the start of opening of the second valve port and the complete opening of the second valve port, and improving the control precision. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a perspective structural schematic view of the temperature regulating valve of one embodiment of the present application;

[0008] Figure 2 is Figure 1 is a sectional structural schematic view of the first embodiment of the temperature regulating valve in the present application;

[0009] Figure 3 is Figure 2 is a structural schematic view of the first embodiment of the thermal element in the present application;

[0010] Figure 4 is Figure 2 is a structural schematic view of the end cover in the present application;

[0011] Figure 5 is Figure 1 is a sectional structural schematic view of the second embodiment of the temperature regulating valve in the present application;

[0012] Figure 6 is Figure 5 is a structural schematic view of the spring seat in the present application;

[0013] Figure 7 is Figure 1 is a sectional structural schematic view of the third embodiment of the temperature regulating valve in the present application;

[0014] Figure 8 is Figure 7 is a structural schematic view of the end cover in the present application;

[0015] Figure 9 is Figure 7 is a structural schematic view of the thermal element in the present application;

[0016] Figure 10 is Figure 1 is a structural schematic view of the temperature regulating valve not comprising a second spring in the present application;

[0017] Figure 11 is a structural schematic view of another embodiment of the end cover of the temperature regulating valve;

[0018] Figure 12 is a structural diagram of a thermal element including a first protruding portion. DETAILED DESCRIPTION

[0019] The technical solutions of the present application are described below in combination with the drawings and specific embodiments. The limit wall includes a first limit wall and a valve rod limit wall. The first end face of the body corresponding to the limit wall is defined as the first limit wall, and the end face of the valve rod corresponding to the limit wall is defined as the valve rod limit wall. Figures 1-4 is a structural diagram of a first embodiment.

[0020] The temperature regulating valve comprises a valve body 1, a first spring 31, an end cover assembly and a thermal element 2. The valve body 1 has a cavity 10 in which the thermal element is located. The cavity 10 has an opening 100 on the outer wall of the valve body. The end cover assembly enters the cavity 10 from the opening 100 of the cavity 10 and is accommodated in the cavity 10. The end cover assembly is limitingly connected or fixed with the valve body 1. In a specific embodiment, the temperature regulating valve comprises a snap ring 51 which is snapped into a groove formed in the valve body 1 so that the end cover assembly cannot continue to move towards the snap ring 51 and fall out. The valve body further comprises a limiting step 110 which abuts against the end cover assembly so that the end cover assembly cannot move into the cavity 10, thereby achieving the relative limiting of the end cover assembly. 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 achieve the limiting. The valve body 1 has a first interface 11, a second interface 12 and a third interface 13 which can communicate with the outside. The cavity 10 comprises a first cavity 101 and a second cavity 102. The second cavity 102 has a smaller aperture than the first cavity 101. The second cavity 102 is farther away from the end cover assembly than the first cavity 101. The first interface 11 communicates with the first cavity 101. The valve body 1 comprises a first step portion which serves as a first valve seat 15 of the temperature regulating valve. The first valve seat 15 forms a first valve port 150. Along the axial direction of the valve body 1, the first valve seat 15 is located between the first interface 11 and the third interface 13. The thermal element 2 can act in the first cavity 101. There is a gap between the thermal element 2 and the inner wall of the valve body 1 for lubricating oil to pass through. The valve body 1 further comprises a second step portion 16 which is located at the bottom of the second cavity 102. At least part of the first spring 31 is located in the second cavity 102. Specifically, one end of the first spring 31 abuts against the second step portion 16 and the other end of the first spring 31 abuts against the thermal element 2. The thermal element 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 aperture of the first valve port 150. The first valve core 21 can close the first valve port 150. One end of the first spring 31 abuts against the lower end surface of the first valve core 21. To prevent the first spring 31 from deviating, the side of the thermal element 2 close to the first valve port 150 is further provided with a spring limiting portion 26 which is located in the first spring 31. In this embodiment, the spring limiting portion 26 is part of the body 22. In other embodiments, the first valve core 21 can also be part of the body 22. When the first valve port 150 is closed, the lower end surface of the first valve core 21 abuts against the first valve seat 15.

[0021] Please refer to Figures 2-4The end cap assembly includes a receiving portion, the receiving portion includes a first receiving portion 400, the end cap assembly includes an end cap 4, the first receiving portion 400 is formed on the end cap 4, the first receiving portion 400 has a first receiving cavity 401, the first receiving cavity 401 has an opening facing the thermodynamic element 2, and the bottom wall of the first receiving portion 400 is formed as a valve stem limiting wall 402. In this embodiment, the valve stem limiting wall 402 faces the first receiving cavity 401. The thermal element 2 includes a valve stem 24 and a thermosensitive material filled within it. The thermosensitive material changes volume with temperature, and this volume change causes the valve stem 24 to move relative to the body 22. The valve stem 24 is closer to the end cover 4 than the spring limiting part 26. Part of the valve stem 24 is located in the first receiving cavity 401. When the valve stem 24 moves toward the end cover 4, the end face 241 of the valve stem 24 contacts the valve stem limiting wall 402. The valve stem limiting wall 402 then prevents the valve stem 24 from continuing to move toward the end cover 4. Therefore, the valve stem 24 is closer to the first spring 31 than the valve stem limiting wall 402. The end cap 4 includes a body portion 41, a second valve seat 44, and a first connecting portion 43. At least one groove 411 is provided on the outer side of the body portion 41. The groove 411 is used to accommodate a sealing element 53, thereby sealing the connection between the body portion 41 and the valve body 1. Alternatively, the groove 411 can be located on the valve body 1. Providing a sealing element 53 between the end cap 4 and the valve body 1 can improve the sealing performance between them. In this embodiment, the first receiving cavity 401 is formed in the body portion 41. The first connecting portion 43 consists of at least two columnar structures, with the gap between adjacent columnar structures serving as a lubricating oil channel. The second interface 12 communicates with the gap between adjacent first connecting portions 43. The second valve seat 44 is approximately an annular structure. The body portion 41 and the second valve seat 44 are connected via the first connecting portion 43. In this embodiment, the second valve seat 44 forms a second valve port 160. The thermal element 2 can abut against the lower end face of the second valve seat 44, thereby sealing the second valve port 160. The outer peripheral wall of the second valve seat 44 contacts the wall of the cavity 10 to achieve a seal at the connection.

[0022] In this embodiment, the axial direction of the valve body 1 refers to the direction that is the same as or parallel to the axial direction of the thermodynamic element 2. The axial direction of the valve body 1 can also be the direction of action of the thermodynamic element 2. Along the axial direction of the valve body 1, the second valve seat 44 is located between the first interface 11 and the second interface 12. When the thermodynamic element 2 opens the second valve port 160, the flow channel between the first interface 11 and the second interface 12 is opened. Specifically, along the axial direction of the valve body 1, the connection between the first interface 11 and the first cavity 101 is located on one side of the second valve seat 44, the connection between the second interface 12 and the first cavity 101 is located on the other side of the second valve seat 44, and the connection between the first interface 11 and the first cavity 101 is located between the second valve seat 44 and the first valve seat 15. In addition, the orifice diameter of the first receiving cavity 401 is about 0.05-0.5 mm larger than the outer diameter of the valve stem 24.

[0023] The body 22 also includes a second valve core 23, which is formed on the outer wall of the body 22. The second valve core 23 is not limited to the side wall of the body 22, but may also include the upper wall of the side relatively close to the valve stem 24.

[0024] The valve body 1 also has a third chamber 103 and a fourth chamber 104. A second step portion 16 is located at the bottom of the fourth chamber 104 and is used to support the first spring 31. The axial direction of the third chamber 103 is approximately perpendicular to the axial direction of the valve body 1. The third interface 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, thereby communicating with the third chamber 103. In addition, the valve body 1 also has a fourth interface 14, which communicates with the third chamber 103 and is used for communication with the outside.

[0025] When the thermostatic valve has four ports, the first port 11 connects to the oil outlet of the transmission, the second port 12 connects to the inlet of the heat exchanger, the third port 13 connects to the outlet of the heat exchanger (used to cool the transmission lubricating oil), and the fourth port 14 connects to the oil inlet of the transmission. When the temperature of the lubricating oil in the transmission is too low, such as below the first set value, the heat-sensitive material in the thermostatic element contracts, and the body 22 moves towards the second valve port 160 until the second valve core 231 abuts against the second valve seat 44 and blocks the second valve port 160. At this time, the first valve port 150 is opened, and there is a gap between the end face 241 of the valve stem and the valve stem limiting wall 402. This is defined as the first position of the thermostatic valve. The flow path of the lubricating oil is as follows: Figure 2The dashed arrows indicate that the transmission lubricating oil enters the temperature control valve from the first port 11 and reaches the first chamber 101. It then flows back to the transmission through the first valve port 150, the second chamber 102, the third chamber 103, and the fourth port 14. At this point, the lubricating oil is not cooled by the heat exchanger. When the temperature of the lubricating oil in the transmission rises, the heat-sensitive material in the thermal element 2 expands due to heat. Because there is a gap between the valve stem 24 and the valve stem limiting wall 402, the body 22 does not move before the end face of the valve stem 24 contacts the valve stem limiting wall 402. At this time, the second valve core 23 remains closed at the second valve port 160, and the first valve port 150 remains open. As the temperature of the lubricating oil continues to rise, when the temperature exceeds the second set value, the end face of the valve stem 24 contacts the valve stem limiting wall 402. This is defined as the second position of the temperature control valve. If the temperature of the lubricating oil continues to rise, the body 22 moves towards the valve stem limiting wall 402 because the valve stem is blocked by the valve stem limiting wall 402. The first valve port 150 moves until the first valve core 21 and the first valve seat 15 cooperate to seal the first valve port 150. The lubricating oil enters the first chamber 101 of the temperature regulating valve from the first interface 11, and then enters the heat exchanger for heat dissipation through the second valve port 160 and the second interface 12. After being cooled, the lubricating oil flows back to the gearbox from the heat exchanger outlet through the third interface 13, the third chamber 103 and the fourth interface 14. If the lubricating oil temperature rises further, the heat-sensitive material expands, and the body 22 moves further towards the first valve port 150. This increases the opening of the second valve port 160, accelerates the cooling speed of the lubricating oil entering the heat exchanger, and allows the lubricating oil temperature to drop rapidly. A gap is provided between the end face 241 of the valve stem and the valve stem limiting wall 402. Compared to the end face of the valve stem 24 being in contact with the valve stem limiting wall or having no gap, this increases the lubricating oil temperature when the second valve port 160 is initially opened, and relatively reduces the temperature difference when the second valve port 160 is fully open. That is, the temperature regulating valve can achieve the second valve port from initial opening to full opening within a relatively small temperature range. If the temperature regulating valve has three ports, the lubricating oil flowing out of the heat exchanger enters the gearbox directly without passing through the third chamber 103, which will not be described in detail.

[0026] Another implementation method is described below, such as... Figures 5-6As shown, 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' has a first receiving cavity 401', and the spring seat 54 and the second spring 32 are located in the first receiving 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 receiving cavity 401' by the first retaining ring 52. One end of the second spring 32 abuts against the bottom wall of the first receiving portion 400, and the other end of the second spring 32 abuts against the spring seat 54. The receiving portion includes a second receiving portion 541, and the spring seat 54 includes a sliding portion 542. The second receiving portion 541 is formed in the spring seat 54 and has a second receiving cavity 5410. The second receiving cavity 5410 can accommodate a portion of the valve stem 24. The end face 241 of the valve stem 24 has a gap with the bottom wall 5411 of the second receiving portion 541. The outer peripheral wall of the sliding portion 542 can slide relative to the inner wall of the end cap 4'. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive material in the thermal element 2 expands due to heat. Before the end face 241 of the valve stem contacts the bottom wall 5411 of the second receiving part 541, the body 22 does not move. At this time, the second valve core still blocks the second valve port 160, and the first valve port 150 is still open. As the temperature of the lubricating oil continues to rise, the end face 241 of the valve stem 24 contacts the bottom wall 5411 of the second receiving part 541. Since the elastic force of the second spring 32 is greater than that of the first spring 31, the body 22 moves towards the first valve port 150 until the first valve core 21 closes the first valve port 150, and the second valve port 160 is opened. The lubricating oil enters the first chamber 101 of the temperature regulating valve from the first interface 11, and enters the heat exchanger for heat dissipation through the second valve port 160 and the second interface 12. After being cooled, the lubricating oil flows back to the gearbox from the heat exchanger through the third interface 13, the third chamber 103, and the fourth interface 14. If the temperature rises further, the heat-sensitive material expands, and the body 22 moves further toward the first valve port 150, thus increasing the opening of the second valve port 160. In this embodiment, the valve stem limiting wall is the bottom wall of the second receiving portion.

[0027] Of course, please see Figure 10 and Figure 6 Alternatively, the temperature control valve may not have a second spring 32. The valve stem 24 contacts the bottom wall of the second receiving portion 541, and there is a gap between the upper wall of the second receiving portion 541 and the bottom wall of the first receiving portion 400. When the upper wall of the second receiving portion 541 is not in contact with the bottom wall of the first receiving portion 400, the second valve port 160 is closed. When the temperature of the lubricating oil further increases, the upper wall of the second receiving portion 541 contacts the bottom wall of the first receiving portion 400, and the body 22 moves toward the first valve port 150. In this embodiment, the bottom wall of the first receiving portion 400 is a valve stem limiting wall.

[0028] In other embodiments, the temperature control valve may also be equipped with a second spring 32, and the valve stem 24 contacts the bottom wall of the second receiving part 541. As the temperature of the lubricating oil increases, the volume of the expanding substance increases, and the valve stem moves. When the second valve port 160 is closed, the elastic force of the second spring 32 is less than the elastic force of the first spring 31. The second receiving part compresses the second spring 32, and the body 22 does not move. After the upper wall of the second receiving part 541 abuts against the bottom wall of the first receiving part 400, the thermal element 2 moves toward the first valve port 150 and finally closes the first valve port 150.

[0029] Please see Figures 7-9 In this embodiment, the second valve seat 44 has a first hole 442 and a second hole 443. The first hole 442 has an opening in the bottom wall 444 of the second valve seat, forming a second valve port 160. The diameter of the first hole 442 is larger than the diameter of the second hole 443. The first hole 442 communicates with the second hole 443. The second hole 443 has an opening in the upper wall of the second valve seat 44. In this embodiment, the first limiting wall 441 is the bottom wall forming the first hole 442. The body 22 includes a second valve core 23 and a first end face 25. The second valve core 23 is formed on the peripheral wall of the body 22. The first end face 25 is closer to the second valve seat 44 than the second valve core 23. The first end face 25 faces the end cap 4. When the second valve core 23 closes the second valve port 160, at least part of the second valve core 23 is located in the first hole 442. Along the axial direction of the valve body 1, there is a gap between the first end face 25 and the first limiting wall 441. The first end face 25 is located in the first hole 442. The inner diameter of the first hole 442 matches the outer diameter of the second valve core 23, enabling the second valve core 23 to close the second valve port 160. Alternatively, when the second valve core 23 is located at the second valve port 160, the lubricating oil flow between them is less than a set value. In this embodiment, the second valve core 23 refers to the side wall of the thermodynamic element, excluding the end wall. To ensure that the second valve core 23 can move within the second valve port 160, the inner diameter of the second valve seat 44 can be slightly larger than that of the second valve core 23. Specifically, the inner diameter of the second valve seat 44 is 0.01-0.05 mm larger than the outer diameter of the second valve core 23, so that they can achieve both sealing and sliding fit.

[0030] When the temperature of the lubricating oil in the transmission is low, such as when the temperature of the lubricating oil flowing through the temperature regulating valve is less than the first set value, the second valve core 23 is located in the second valve port 160. In the axial direction of the valve body 1, the first end face 25 has a gap with the first limiting wall 441, which is defined as the first position of the temperature regulating valve. At this time, the second valve core 23 closes the second valve port 160, and the first valve core 21 opens the first valve port 150. The lubricating oil enters the first chamber 101 of the temperature regulating valve through the first interface 11, and then flows back to the transmission through the first valve port 150, the second chamber 102, the third chamber 103, and the fourth interface 14. At this time, the lubricating oil is not cooled by the heat exchanger. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive material in the thermodynamic element 2 expands due to heat. Since the valve stem 24 is in contact with the bottom wall of the first receiving part 541, before the first end face 25 contacts the first limiting wall 441, the thermodynamic element 2 moves toward the first limiting wall 441. At this time, the second valve core 23 still blocks the second valve port 160, and the first valve port 150 is still in the 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 the second set value, the first end face 25 contacts the first limiting wall 441. This is defined as the second position. Then the body 22 of the thermodynamic element moves toward the first valve port 150 until the first valve core 21 closes the first valve port 150. The lubricating oil enters the first chamber 101 of the temperature regulating valve from the first interface 11, and then flows out through the second valve port 160 and the second interface 12, and enters the heat exchanger of the system for heat dissipation. The lubricating oil after heat dissipation and cooling flows back to the gearbox through the third interface 13, the third chamber 103, and the fourth interface 14. A gap is provided between the first end face 25 and the first limiting wall 441 to reduce the temperature difference when the second valve port 160 is initially open to fully open. That is, the temperature control valve can achieve initial opening to full opening within a relatively small temperature range. It can be seen that in the first position, and between the first and second positions, and in the second position, the second valve core is located in the first hole. When moving from the first position to the second position, the gap between the first end face and the first limiting wall becomes smaller.

[0031] Please see Figure 11 and Figure 12The difference from the above embodiment is that the thermal element 2 includes a first protrusion 26, or in other words, the first protrusion 26 is part of the thermal element 2, and the outer diameter of the first protrusion 26 is larger than the outer diameter of the body 22. A first end face 25' is formed on the upper wall of the first protrusion 26, and the first end face 25' faces the second valve seat 44. The first end face 25' is farther away from the second valve seat 44 than the second valve core 23. A first limiting wall 441' is formed on the bottom wall of the second valve seat 44. When the temperature of the lubricating oil in the gearbox is low, the second valve core 23 is located in the second valve port 160. In the axial direction of the valve body 1, there is a gap between the first end face 25' and the first limiting wall 441'. At this time, the second valve core 23 closes the second valve port 160. The lubricating oil enters the temperature regulating valve from the first interface 11 and reaches the first chamber 101. Then, it flows back to the gearbox through the first valve port 150, the second chamber 102, the third chamber 103, and the fourth interface 14 without being cooled by the heat exchanger. When the temperature of the lubricating oil in the gearbox rises, the heat-sensitive material in the thermal element 2 expands due to heat. Before the first end face 25' contacts the first limiting wall 441', the thermal element 22 moves toward the second valve seat 44. At this time, the second valve core still blocks the second valve port 160, and the first valve port 150 is still open. As the temperature continues to rise, the first end face 25' contacts the first limiting wall 441', and the body 22 moves toward the first valve port 150 until the first valve core 21 closes the first valve port 150. The lubricating oil enters the first chamber 101 of the temperature regulating valve from the first interface 11, and then flows out through the second valve port 160 and the second interface 12, entering the heat exchanger of the system for heat dissipation. After being cooled, the lubricating oil flows back to the gearbox through the third interface 13, the third chamber 103, and the fourth interface 14. A gap is provided between the bottom wall of the second valve seat 44 and the first protrusion 26, which reduces the temperature difference when the second valve port 160 is initially opened to fully open. That is, the temperature control valve can realize the second valve port from initially open to fully open within a relatively small temperature range.

[0032] The above description is merely a specific embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention based on the above-disclosed technical content, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall still fall within the protection scope of the technical solutions of the present invention.

Claims

1. A temperature regulating valve, comprising a valve body having a cavity, an end cap assembly, a thermodynamic element mounted in the cavity, and at least one spring, wherein the end cap assembly is fixed or limited relative to the valve body, the cavity comprising a first cavity and a second cavity, the second cavity being located away from the end cap assembly relative to the first cavity; the valve body having a first interface, a second interface, and a third interface, the first interface communicating with the first cavity, and the third interface communicating with the second cavity; the spring comprising a first spring, at least a portion of the first spring being located in the second cavity, and at least a portion of the thermodynamic element being located in the first cavity; one end of the thermodynamic element abutting or indirectly abutting against the first spring, and the thermodynamic element being slidable relative to the end cap assembly; The end cap assembly includes a limiting wall, the thermodynamic element includes a valve core, the temperature control valve has a first valve port and a second valve port, the temperature control valve includes a first valve seat and a second valve seat, the first valve seat has the first valve port, the second valve seat forms the second valve port, the first valve seat is located between the first interface and the third interface, and the second valve seat is located between the first interface and the second interface of the valve body; the temperature control valve includes a first position and a second position; when the valve core closes the second valve port, along the axial direction of the valve body, in the first position, there is a gap between one end face of the thermodynamic element and the limiting wall, and in the second position, one end face of the thermodynamic element abuts against the limiting wall.

2. The temperature regulating valve according to claim 1, characterized in that, The valve core includes a first valve core and a second valve core. The first valve core cooperates with the first valve port, and the second valve core cooperates with the second valve port. The thermodynamic element includes a body, one end of which abuts or indirectly abuts with the first spring.

3. The temperature regulating valve according to claim 2, characterized in that, The body includes a first end face, and the second valve core is formed on the body; along the axial direction of the valve body, the second valve seat is located between the first interface and the second interface, the second valve seat includes a first hole, the first hole has an opening in the bottom wall of the second valve seat, the first hole is the second valve port, the limiting wall includes a first limiting wall, the first limiting wall is formed on the second valve seat, when the second valve core closes the second valve port, at the first position, there is a gap between the first end face and the first limiting wall.

4. The temperature regulating valve according to claim 3, characterized in that, The second valve seat has a second hole, the diameter of the first hole is larger than the diameter of the second hole, the second hole has an opening in the first limiting wall, the first limiting wall faces the first hole, the first hole communicates with the second hole, the second hole has an opening in the upper wall of the second valve seat, and part of the thermodynamic element is located in the second hole; The first end face is closer to the second hole than the second valve core. When the second valve core closes the second valve port, the first end face is located in the first hole.

5. The temperature regulating valve according to claim 3, characterized in that, The thermodynamic element includes a first protrusion, the outer diameter of which is larger than the outer diameter of the second valve core; a first end face is formed on the upper wall of the first protrusion and faces the second valve seat; and a first limiting wall is formed on the bottom wall of the second valve seat. The first end face is farther away from the second valve seat than the second valve core. When the second valve core closes the second valve port, in the first position, there is a gap between the first end face and the bottom wall of the second valve seat.

6. The temperature regulating valve according to claim 4 or 5, characterized in that, In both the first and second positions, the second valve core is located in the first hole, and the second valve core closes the second valve port in both positions; the second valve core is capable of moving from the first position to the second position in the second valve port.

7. The temperature regulating valve according to claim 2, characterized in that, The thermodynamic element includes a valve stem; the end cap assembly includes a receiving portion having a receiving cavity, the receiving portion including a valve stem limiting wall, the end face of the valve stem being located in the receiving cavity, and the valve stem being closer to the first spring than the valve stem limiting wall; When the valve core closes the second valve port, along the axial direction of the valve body, at the first position, there is a gap between the end face of the valve stem and the valve stem limiting wall.

8. The temperature regulating valve according to claim 7, characterized in that, The end cap assembly includes an end cap, which is fixed or limited to the valve body. The end cap includes a body portion, a first connecting portion, and a second valve seat. At least a portion of the body portion is farther away from the first interface than the second interface. The side wall of the body portion is sealed to the inner wall of the valve body. The first connecting portion connects the body portion and the second valve seat. There is a gap between adjacent first connecting portions. The side wall of the second valve seat is sealed to the inner wall of the valve body. In the axial direction of the valve body, at least a portion of the first connecting portion is located between the second interface and the second valve seat. The end cap includes a first receiving portion having a first receiving cavity; the valve stem protrudes toward the end cap relative to the body, and the end face of the valve stem is located in the first receiving cavity.

9. The temperature regulating valve according to claim 8, characterized in that, The receiving portion includes a first receiving portion formed on the body portion, the first receiving cavity having an opening toward the second valve seat, and the bottom wall of the first receiving portion being formed as the valve stem limiting wall.

10. The temperature regulating valve according to claim 9, characterized in that, The receiving portion includes a second receiving portion; the end cap assembly includes a spring seat, the end cap assembly includes a first retaining ring, the spring seat is limited in the first receiving portion by the first retaining ring, the spring seat includes a sliding portion and a second receiving portion, the sliding portion is slidable relative to the first receiving portion, the second receiving portion has a second receiving cavity, the second receiving cavity has an opening facing the second valve seat, the end face of the valve stem is located in the second receiving cavity, the valve stem is fixedly disposed with the second receiving portion or is slidable relative to the second receiving portion.

11. The temperature regulating valve according to claim 10, characterized in that, The end cap assembly includes a second spring located in the first receiving cavity. One end of the second spring abuts against the spring seat, and the other end of the second spring abuts against the bottom wall of the first receiving portion. When the valve core closes the second valve port, the deformation force of the second spring is less than that of the first spring.

12. The temperature regulating valve according to claim 8, characterized in that, The receiving portion includes a first receiving portion and a second receiving portion, the first receiving portion being formed in the body portion, and the first receiving cavity having an opening toward the second valve seat; The end cap assembly includes a spring seat and a second spring, which are located in the first receiving cavity. One end of the second spring abuts against the spring seat, and the other end of the second spring abuts against the bottom wall of the first receiving portion. The end cap assembly includes a first retaining ring, which limits the spring seat to the first receiving portion. The second receiving portion is formed in the spring seat, and the spring seat also includes a sliding portion. The outer side wall of the sliding portion is spaced apart from the side wall of the first receiving portion. The second receiving portion has a second receiving cavity with an opening facing the second valve seat. The end face of the valve stem is located in the second receiving cavity, and the bottom wall of the second receiving portion forms the valve stem limiting wall. When the valve core closes the second valve port, the deformation force of the second spring is greater than that of the first spring.

13. The temperature regulating valve according to claim 7, 11, or 12, characterized in that, When the temperature of the lubricating oil flowing through the temperature regulating valve is less than the first set value, when the valve core closes the second valve port, there is a gap between the end face 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 greater than the second set value, there is no gap between the end face of the valve stem and the valve stem limiting wall, or the valve stem is limited relative to the limiting wall, and the valve core closes the first valve port and opens the second valve port; When the temperature of the lubricating oil flowing through the temperature regulating valve is less than or equal to the second set value and greater than or equal to the first set value, the gap between the end face of the valve stem and the valve stem limiting wall becomes smaller.

14. The temperature regulating valve according to claim 3 or 5, characterized in that, The body includes a first end face, and the limiting wall includes a first limiting wall. When the temperature of the lubricating oil flowing through the temperature regulating valve is less than a first set value, when the second valve core closes the second valve port, the first valve core opens the first valve port. Along the axial direction of the valve body, there is a gap between the first end face and the first limiting wall. When the temperature of the lubricating oil flowing through the temperature regulating valve is greater than the second set value, there is no gap between the first end face 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 control valve is less than or equal to the second set value and greater than or equal to the first set value, the gap between the first end face and the first limiting wall becomes smaller, and the thermodynamic element moves toward the end cover assembly.

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