CN210830399U

CN210830399U - Temperature control device and temperature control system

Info

Publication number: CN210830399U
Application number: CN201920849002.6U
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: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-06-23
Anticipated expiration: 2029-06-06

Abstract

The utility model provides a temperature control device, includes outer wall portion, third mouth, tip, outer wall portion includes the annular groove, the annular groove is located the third mouth with between the tip, the annular groove encircles outer wall portion installs in other parts through inserting temperature control device, such as gearbox box etc to omit the interface, no longer through tube coupling between with the gearbox, reduced temperature control device's occupation space.

Description

Temperature control device and temperature control system

Technical Field

The utility model relates to a fluid control by temperature change technical field, concretely relates to can change fluid flow path's temperature control system along with temperature variation.

Background

During the running process of the automobile, all parts of the automobile need to be lubricated by lubricating oil in time to ensure the normal running of the automobile. If the lubricating performance of the lubricating oil is not good enough, the service life of the automobile can be influenced, for example, the gearbox oil and the like, and the temperature of the gearbox oil is generally regulated through a temperature control flow path formed by a temperature regulating valve and a heat exchange device for external cooling. When the temperature of the oil way of the temperature changing box rises, the heat sensitive substance of the thermal drive assembly is heated to expand, the oil of the gearbox directly flows back to the channel of the gearbox to be sealed or the flow of the channel is reduced, and the high-temperature oil enters the heat exchange device for external cooling to be cooled and then flows back to the gearbox. On the contrary, when the oil temperature is too low, the thermosensitive substances of the thermal driving assembly begin to shrink, the ejector rod resets, and the channel for directly flowing the gearbox oil back to the gearbox is opened. The oil of the gearbox oil way exchanges heat with the heated gearbox components in the flowing process, so that the gearbox components are controlled at a proper temperature.

In a general temperature control flow path, the temperature regulating valve is generally connected with the gearbox and the heat exchange device for external cooling through pipelines, the temperature regulating valve needs to be designed at a proper installation position to be fixed, the temperature regulating valve is connected with the gearbox through the pipelines, and the pipelines occupy a certain space.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the technical scheme of the utility model provides a temperature control device.

A temperature control device is provided with a first valve port and comprises a valve body, wherein the valve body comprises an end part and an outer wall part, a cavity is formed in the valve body, and the cavity penetrates through the end part; the temperature control device comprises a first spring, an end seat and a thermal motion assembly; the first spring, an end seat and a thermal valve assembly are positioned in the cavity, the thermal valve assembly is abutted against the first spring, the thermal valve assembly is abutted against the end seat, the end seat is close to the end part relative to the first spring, the end seat is far away from the first valve port relative to the thermal valve assembly, the thermal valve assembly comprises a first valve port part, and the first valve port is matched with the first valve port part to realize the opening and closing of the first valve port; the valve body is at least provided with a first port, a second port and a third port, the first port is far away from the end part relative to the third port, the second port is positioned between the first port and the third port, and the second port and the third port are respectively connected with the cavity; the outer wall portion further includes an annular groove located between the third port and the end portion, the annular groove surrounding the outer wall portion.

The utility model provides a temperature control device can insert and install in other parts, for example gearbox box etc. and can save the tube coupling between the gearbox, has reduced temperature control device's occupation space.

The utility model also provides a temperature control system.

The utility model provides a temperature control system, temperature control system includes temperature control device as above, temperature control system includes the gearbox, the gearbox includes the derailleur box, the derailleur box includes the temperature control device installation cavity, temperature control device insert install in the temperature control device installation cavity, temperature control device is including cooperation wall portion, the inner wall that the temperature control device installation cavity corresponds with be clearance fit between temperature control device's the cooperation wall portion.

The utility model provides a temperature control system through inserting temperature control device and installing in the temperature control device installation cavity, has saved the pipeline of being connected with the gearbox, has reduced temperature control system's occupation space, and temperature control device's installation is also comparatively convenient moreover.

Drawings

Fig. 1 is a schematic diagram of an embodiment of the temperature control system of the present invention.

Fig. 2 is a schematic cross-sectional view of a temperature control device of the temperature control system shown in fig. 1.

FIG. 3a is a schematic perspective view of an end seat of the thermostatic valve of FIG. 2.

FIG. 3b is a schematic cross-sectional view of an end seat of the thermostatic valve of FIG. 2.

Fig. 4 is a perspective view of a spring cap of the thermostatic valve of fig. 2.

Fig. 5 is a schematic diagram of another embodiment of the temperature control system of the present invention.

Detailed Description

Specific embodiments will now be described in detail with reference to the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Those of ordinary skill in the art will appreciate that the specific components, devices, orientations and features illustrated in the drawings and described herein are merely exemplary and should not be considered limiting.

The first embodiment is described.

Fig. 1 illustrates a temperature control system 50, and the temperature control system 50 includes a transmission 30, a temperature control device 10, and an oil cooler 40. The transmission 30 comprises a transmission case 31, the transmission case 31 is provided with a temperature control device installation cavity 35, the temperature control device 10 is inserted into the temperature control device installation cavity 35, the transmission case 31 is provided with at least a first channel 32, a second channel 33 and a third channel 34, and the first channel 32, the second channel 33 and the third channel 34 are communicated with the temperature control device 10. The second passage 33 and the third passage 34 are communicated with the oil cooler 40. It should be noted here that the oil cooler 40 may be directly fixed to the transmission case 31, and the oil cooler 40 may be connected to the transmission case 31 through a pipe.

Fig. 2 illustrates a thermostat 10 that can be mounted to a thermostat mounting cavity 35 of a transmission case 31 of the thermostat system 50 shown in fig. 1. The temperature control device 10 comprises a valve body 11, a first spring 12, a thermal actuator 13, an end seat 14, a second spring 15, a second retainer ring 16, a spring cap 17 and a first retainer ring 19.

The valve body 11 includes an end portion 18 and an outer wall portion 116. The end portion 18 has a prism shape, which facilitates the installation of the temperature control device 10 in the temperature control device installation cavity 35 by a tool. The outer wall 116 includes an outer wall 1164, the outer wall 1164 includes a first portion 1161 and a second portion 1162, the second portion 1162 is close to the end 18 relative to the first portion 1161, a portion of the outer wall 1164 between the first portion 1161 and the second portion 1162 is a surface of revolution, and particularly, as shown in fig. 2, the outer wall 116 extends from the first portion 1161 to the second portion 1162 in a non-reducing manner. It should be noted that the term "extend in a non-reducing manner" as used herein means that the diameter of the outer wall portion is kept constant or increased and is not decreased from the first portion 1161 to the second portion 1162. In addition, a portion of the outer wall surface 1164 between the first portion 1161 and the second portion 1162 may not be a surface of revolution. A portion of the outer wall portion between the first portion 1161 and the second portion 1162 is defined as a mating wall portion.

The inner wall corresponding to the temperature control device installation cavity 35 is in clearance fit with the matching wall part of the temperature control device 10, for example, the clearance between the inner wall corresponding to the temperature control device installation cavity 35 and the matching wall part of the temperature control device 10 is 0.05-0.10mm, an oil seal can be formed, and internal leakage of the temperature control device 10 is effectively prevented.

The outer wall portion 116 further includes an annular recess 1163, the second portion 1162 being remote from the end portion 18 relative to the annular recess 1163, the annular recess 1163 being recessed inwardly from the outer wall surface 1164, the annular recess 1163 surrounding the outer wall portion 116. The annular groove 1163 may be provided with a sealing ring.

Outer wall portion 116 may include screw portion, and screw portion is the external screw thread, and screw portion protrusion in outer wall 1164, screw portion set up between second position 1162 and annular groove 1163, and temperature control device installation cavity 35 includes the internal thread, and the external screw thread through screw portion and the internal thread engagement of temperature control device installation cavity 35 realize fixed to temperature control device 10. Of course, a fastening groove may be provided in the temperature control device mounting cavity 35, and the temperature control device 10 may be fixed by a fastening manner. In this embodiment, the sealing performance is improved by screwing and providing the sealing ring, the further sealing rings provided in the annular groove 1163 and the annular groove 1163 are located between the external thread portion and the end portion 18, meanwhile, a side wall of the annular groove 1163 is located at the end portion 18, the diameter of the end portion 18 is greater than or equal to the diameter of the thread portion, after the temperature control device 10 is installed in the temperature control device installation cavity 35, the end portion 18 abuts against the transmission case 31, and the sealing ring can be compressed by the end portion 18, thereby further improving the sealing performance.

The valve body 11 has a cavity 20 therein, the cavity 20 extends through the end portion 18, and the first retainer 19, the end seat 14, the first spring 12, the thermal assembly 13, the second spring 15, the second retainer 16, and the spring cap 17 are all located in the cavity 20. The temperature control device 10 has a first valve port 111 and a second valve port 112, the cavity 20 includes a first cavity 21, a second cavity 22, and a third cavity 23, the first cavity 21 is far from the end portion 18 relative to the third cavity 23, the second cavity 22 is located between the first cavity 21 and the third cavity 23, the first valve port 111 is located between the first cavity 21 and the second cavity 22, the first valve port 111 can communicate the first cavity 21 and the second cavity 22, the second valve port 112 is located between the second cavity 22 and the third cavity 23, and the second valve port 112 can communicate the second cavity 22 and the third cavity 23.

The valve body 11 is provided with at least a first port 113, a second port 114 and a third port 115, the first port 113 is far away from the end 18 relative to the third port 115, the second port 114 is positioned between the first port 113 and the third port 115, the first port 113 is connected with the first cavity 21, the second port 114 is connected with the second cavity 22, and the third port 115 is connected with the third cavity 23. The third port 113 is distal from the end 18 relative to the annular recess 1163, i.e., the annular recess 1163 is located between the third port 113 and the end 18, and the third port 113 is distal from the end 18 relative to the second portion 1162.

The first passage 32 is connected to the second port 114, the second passage 33 is connected to the first port 113, and the third passage 34 is connected to the third port 115.

The diameter of the corresponding inner wall of the second chamber 22 is larger than that of the first chamber 21, so that a valve port step 117 is formed in the valve body 11, and the first valve port 111 is located at the valve port step 117.

A portion of the end seat 14 is located in the third chamber 23 and the second valve port 112 is located at an end side of the end seat 14 adjacent the second chamber 22.

As shown in FIG. 2, the inner wall of the first chamber 21 includes a bottom wall 211 and a peripheral wall 212, the first spring 12 is at least partially located in the first chamber 21, one end of the first spring 12 abuts against the bottom wall 211, and the other end abuts against the thermal assembly 13.

The third port 115 opens in the bottom wall 211 or the side wall 212.

In the present embodiment, the bottom wall 211 is provided with the third opening 115, and the side wall 212 is provided with the fourth opening 118, and as shown in fig. 1, the center line of the third opening 115 approximately coincides with the axis of the temperature control device 10, but the side wall 212 may not be provided with the fourth opening 118. In other embodiments, the sidewall 212 defines the third opening 115 and the bottom wall 211 defines the fourth opening 118. As shown in FIG. 5, the centerline of the third opening 115 is approximately perpendicular to the axis of the temperature control device 10, although the bottom wall 211 may not define the fourth opening 118.

The thermal actuator 13 includes a body 131 and a ram 132, and the thermal actuator 13 includes a heat sensitive material therein, and the heat sensitive material expands in volume when the temperature increases and contracts in volume when the temperature decreases. The body 131 of the thermal assembly is at least partially located in the second chamber 22. The thermal valve assembly 13 includes a first valve port portion 133 and a second valve port portion 134. The first and second

valve port portions

133 and 134 are located at both ends of the thermal valve assembly 13. The diameter of the first valve port 133 is larger than that of the first valve port 111, and the first valve port 133 and the first valve port 111 are matched to open and close the first valve port 111, that is, the first chamber 21 and the second chamber 22 are communicated and cut off; the diameter of the second valve port portion 134 is larger than that of the second valve port 112, and the second valve port portion 134 and the second valve port 112 cooperate to open and close the second valve port 112, that is, to communicate and block the second chamber 22 and the third chamber 23. One end of the thermal actuator 13 abuts against the first spring 12, and the other end of the thermal actuator 13 abuts against the end seat 14.

In this embodiment, the thermal assembly 13 includes a sheet 135, the sheet 135 is annular, the sheet 135 is sleeved on the body 131, the body 131 includes a body step portion, the body step portion is located by the sheet 135, the sheet 135 is tightly fitted with the body 131, the sheet 135 forms the first valve port portion 133, and the sheet 135 can move along with the body to be away from or abut against the valve port step portion 117, so as to open and close the first valve port 111. When the first valve port 111 is closed, the sheet body 135 is attached to the valve port step 117 to realize end face sealing. The way of separately arranging the sheet 135 to form the first valve port 111 can reduce the outer diameter of the body 131, thereby increasing the flow cross-sectional area in the second chamber 22 and reducing the flow resistance of the fluid; at the same time, the processing of the body 131 is simplified. Of course, the body 131 may be integrally provided with the sheet 135.

In further embodiments, the larger diameter of the body step is greater than the diameter of the first valve port 111, and the body step forms the first valve port 133. The body 131 includes a body step portion having a larger diameter than that of the first valve port 111, and the body step portion forms a first valve port portion 133.

In further embodiments, the diameter of the body 131 furthest from the end 18 is larger than the diameter of the first valve port 111, and the body 131 furthest from the end 18 forms a first valve port 133.

The end seat 14 is located proximate to the end 18 relative to the first spring 12 or at least a portion of the end 14 is located at the end, and the end seat 14 is located away from the first valve port 111 relative to the thermal assembly 13.

As shown in fig. 3a, 3b, the end seat 14 includes an outer peripheral surface 144, and the outer peripheral surface 144 includes a sealing groove 145. The sealing groove 145 may be provided with a sealing ring. After the temperature control device 10 is installed, at least part of the sealing ring arranged in the sealing groove 145 is attached to the inner wall corresponding to the third cavity 23, so that the transmission oil is effectively prevented from leaking out through the gap between the outer peripheral surface 144 of the end seat 14 and the inner wall corresponding to the third cavity 23.

The end seat 14 includes a positioning step portion 146, the inner wall corresponding to the third cavity 23 includes a positioning step matching portion 233, and the positioning step portion 146 and the positioning step matching portion 233 are matched to realize the positioning of the end seat 14. The corresponding inner wall of the third chamber 23 includes a mounting recess 234, the mounting recess 234 is closer to the end portion 18 than the positioning step engaging portion 233, and the mounting recess 234 may be provided with the first retainer 19. The end seat includes an outer end surface 147 and the first retainer ring 19 is engaged with the outer end surface 147 to position the end seat 14. The positioning step portion 146 is attached to the positioning step matching portion 233, end face sealing can be further formed, and leakage of transmission oil is further prevented.

The end seat 14 is provided with a seat cavity 141, the peripheral wall of the end seat 14 is provided with an opening, and the opening formed in the peripheral wall of the end seat 14 is communicated with the third port 113. The seat cavity 141 includes a spring cavity 142, the spring cavity 142 being closer to the end 18 than the third port 113. The spring cap 17 is located in the spring cavity 142, a retaining ring groove 143 is arranged on the inner wall corresponding to the spring cavity 142, the inner wall corresponding to the spring cavity 142 of the retaining ring groove 143 is inwards recessed, a retaining ring 16 is arranged on the retaining ring groove 143, and the retaining ring 16 realizes the limiting of the spring cap 17.

As shown in fig. 4, the spring cap 17 includes a brim 171, a cap body 172, and the brim 171 extends radially away from the cap body 172 from the outer side of the cap body 172. The brim 171 includes a plurality of notches 173 circumferentially, and the notches 173 may balance the pressure on both sides of the brim 171. The cap body 172 is provided with a cap groove 1721.

The ram 131 of the thermal assembly extends into the cap slot 1721. The second spring 15 is at least partially located in the spring cavity 142, and one end of the second spring 15 abuts against the cap edge 171 and the other end abuts against a corresponding inner wall of the spring cavity 142.

The first spring 12 and the second spring 15 both have initial deformation force, the initial deformation force of the first spring 12 is smaller than that of the second spring 15, and the initial deformation force of the second spring 15 is greater than or equal to the elastic force of the first spring 12 when the first valve port is closed. The initial deformation force refers to the pressure required by the spring in a compressed state when the product is not used and the spring is subjected to external force to generate deformation.

This kind of can insert temperature control device 10 with this technical scheme and install in temperature control device installation cavity 35 of gearbox casing 31, can reduce the pipeline that temperature control device 10 and gearbox carry out being connected, when having saved the joint of being connected with the gearbox, reduced because of the not good hourglass risk that arouses of sealed effect of joint department, it is also comparatively convenient with the replacement to install moreover, simultaneously, compare with traditional temperature control device, it is littleer to have the volume, the lighter advantage of quality.

In this embodiment, the temperature control device 10 can be fixed to the temperature control device installation cavity 35 through a buckle, a thread and the like, and the temperature control device 10 is convenient to install, dismantle and replace, and has the advantages of convenience in later maintenance and the like.

Temperature control device 10 is when using for a long time, there is the risk of failure first spring 12, second spring 15 etc. need be changed, change first spring 12 after taking out temperature control device 10 wholly, second spring 15 etc. can influence the holistic leakproofness of temperature control device 10 and temperature control device 10 wholly takes out also comparatively inconvenient, and this embodiment can change the parts that fail under the prerequisite of not taking out valve body 11 after dismantling first retaining ring, it is more convenient to maintain.

When the temperature of the fluid is low, the heat sensitive material in the thermal valve assembly 13 contracts, the body 131 of the thermal valve assembly 13 moves towards the second valve port 112 and closes the second valve port 112, the second chamber 22 is communicated with the first chamber 21, and after the fluid flows into the second chamber 22 of the temperature control device 10 from the first passage 32, the fluid flows into the first chamber 21 through the first valve port 111, and flows out from the third port 115 and flows back to the transmission case through the second passage 33.

When the temperature of the fluid is high, the heat sensitive material in the thermal power assembly 13 expands, the body 131 of the thermal power assembly 13 moves towards the first valve port 111 and closes the first valve port 111, at this time, the second chamber 22 is communicated with the third chamber 23, and after the fluid flows into the second chamber 22 of the temperature control device 10 from the first channel 32, the fluid flows into the third chamber 23 through the second valve port 112, flows out of the first port 113, flows to the oil cooler 40 through the third channel 34 to be cooled, and then flows back to the transmission through the second channel 33 after flowing out of the oil cooler 40.

It should be noted that: the expressions in the above embodiments with respect to "first", "second", "third", etc. are merely for naming purposes and do not include any sequential limitations. The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof without departing from the spirit and scope of the present invention can be modified or replaced by other technical solutions and modifications by those skilled in the art.

Claims

1. A temperature control device is provided with a first valve port and is characterized by comprising a valve body, wherein the valve body comprises an end part and an outer wall part, a cavity is arranged in the valve body, and the cavity penetrates through the end part; the temperature control device comprises a first spring, an end seat and a thermal motion assembly; the first spring, an end seat and a thermal valve assembly are positioned in the cavity, one end of the thermal valve assembly is abutted against the first spring, the other end of the thermal valve assembly is abutted against the end seat, the end seat is close to the end part relative to the first spring or at least one part of the end seat is positioned at the end part, the end seat is far away from the first valve port relative to the thermal valve assembly, the thermal valve assembly comprises a first valve port part, and the first valve port part is matched with the first valve port part to realize the opening and closing of the first valve port; the valve body is at least provided with a first port, a second port and a third port, the first port is far away from the end part relative to the third port, the second port is positioned between the first port and the third port, and the second port and the third port are respectively connected with the cavity; the outer wall portion further includes an annular groove located between the third port and the end portion, the annular groove surrounding the outer wall portion.

2. The temperature control device of claim 1, wherein the outer wall portion includes a threaded portion, the outer wall portion includes an outer wall surface, the threaded portion protrudes from the outer wall surface, the threaded portion is located between the end portion and the third port, the annular groove is located between the threaded portion and the end portion, and a sidewall portion of the annular groove is located at the end portion.

3. The temperature control device of claim 1, wherein the temperature control device comprises a first retaining ring, the end portion is prism-shaped, the end seat comprises a positioning step portion, the inner wall corresponding to the cavity comprises a positioning step matching portion, the positioning step portion is matched with the positioning step matching portion to realize positioning of the end seat, the inner wall corresponding to the cavity comprises a mounting groove, the mounting groove is closer to the end portion than the positioning step matching portion, and the mounting groove is provided with the first retaining ring.

4. The temperature control device of any one of claims 1-3, wherein the temperature control device comprises a second valve port, the chamber comprising a first chamber, a second chamber, and a third chamber, the first chamber being distal from the end relative to the third chamber, the second chamber being between the first chamber and the third chamber; the end seat is positioned in the first cavity, the valve body comprises a valve port stepped part, and the second valve port is positioned at the valve port stepped part; the first port is connected with the first cavity, the second port is connected with the second cavity, the third port is connected with the third cavity, the thermal valve assembly comprises a second valve port portion, the first valve port portion is matched with the first valve port to achieve communication and cut-off of the first cavity and the second cavity, and the second valve port portion is matched with the second valve port to achieve communication and cut-off of the second cavity and the third cavity.

5. The temperature control device according to claim 4, wherein the thermal actuator comprises a plate and a body, the plate is annular, the plate is sleeved on the body, the body comprises a body step portion, the body step portion is positioned on the plate, the plate is tightly fitted with the body, the plate forms a first valve port portion, the plate can move along with the body to open and close the first valve port, and when the first valve port is closed, the plate is fitted with the end seat to realize end face sealing.

6. The temperature control device according to claim 4, wherein the valve body defines a fourth port, a center line of the first port approximately coincides with an axis of the temperature control device, an inner wall of the first chamber corresponds to the fourth port and includes a bottom wall and a side wall, the first port is defined in the bottom wall, the fourth port is defined in the side wall, the first spring abuts against the bottom wall, and the first spring is in a compressed state.

7. The temperature control device according to claim 4, wherein the thermal actuator comprises a push rod, the temperature control device comprises a second spring and a spring cap, the end seat comprises a seat cavity, the seat cavity is connected with the third port, the seat cavity comprises a spring cavity, the spring cavity is far away from the second cavity relative to the rest part of the seat cavity except the spring cavity, the second spring and the spring cap are located in the spring cavity, the spring cap comprises a cap body and a cap edge, the cap edge extends from the outer side surface of the cap body in a radial direction away from the cap body, the cap body is provided with a cap groove, the push rod of the thermal actuator extends into the cap groove, one end of the second spring abuts against the cap edge, the other end of the second spring abuts against the inner wall corresponding to the spring cavity, the inner wall corresponding to the spring cavity is provided with a retainer ring groove, and the retainer ring groove is recessed inwards from the inner wall corresponding to the spring cavity, and a second check ring is arranged in the check ring groove, and the second valve port is positioned at one end side of the end seat close to the second cavity.

8. A temperature control system, comprising the temperature control device of any one of claims 1-7, wherein the temperature control system comprises a transmission case, the transmission case comprises a transmission case body, the transmission case body comprises a temperature control device installation cavity, the temperature control device is inserted into the temperature control device installation cavity, the temperature control device comprises a matching wall portion, and an inner wall corresponding to the temperature control device installation cavity and the matching wall portion of the temperature control device are in clearance fit.

9. The temperature control system according to claim 8, wherein the transmission case includes at least a first passage, a second passage, and a third passage, the first passage is connected to the second port, the second passage is connected to the first port, the third passage is connected to the third port, the first port is connected to the first chamber, the second port is connected to the second chamber, the third port is connected to the third chamber, and a gap between an inner wall of the temperature control device installation chamber corresponding thereto and a mating wall portion of the temperature control device is 0.05-0.10 mm.

10. A temperature control system, wherein the temperature control system comprises the temperature control device according to any one of claims 4 to 7, the temperature control system comprises a transmission case, the transmission case comprises a transmission case body, the transmission case body comprises a temperature control device installation cavity, the temperature control device is inserted into the temperature control device installation cavity, the temperature control device comprises a matching wall part, and a corresponding inner wall of the temperature control device installation cavity is in clearance fit with the matching wall part of the temperature control device;

the transmission box body at least comprises a first channel, a second channel and a third channel, wherein the first channel is connected with the second port, the second channel is connected with the first port, the third channel is connected with the third port, the first port is connected with the first cavity, the second port is connected with the second cavity, and the third port is connected with the third cavity;

the temperature control system comprises an oil cooler, when the temperature of fluid in the temperature control system is low, the thermal valve assembly moves towards the second valve port and closes the second valve port, the second cavity is communicated with the first cavity, and after the fluid flows into the second cavity from the first channel, the fluid flows into the first cavity through the first valve port and flows out from the third port and flows back to the gearbox through the second channel;

when the temperature of the fluid is high, the thermal valve assembly moves towards the first valve port and closes the first valve port, the second cavity is communicated with the third cavity, the fluid flows into the second cavity from the first channel, flows into the third cavity through the second valve port, flows out of the first port, flows to the oil cooler through the third channel to be cooled, flows out of the oil cooler and flows back to the gearbox through the second channel.