CN109780259B

CN109780259B - Temperature regulating valve

Info

Publication number: CN109780259B
Application number: CN201711115307.6A
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: 2017-11-13
Filing date: 2017-11-13
Publication date: 2021-02-02
Anticipated expiration: 2037-11-13
Also published as: CN109780259A

Abstract

The invention discloses a temperature regulating valve, which comprises an end cover, a valve body and a valve core in a valve cavity, wherein the temperature regulating valve is provided with a first outlet, a second outlet and a first inlet communicated with the valve cavity; a return spring and a memory spring are also arranged in the valve cavity; one end of the reset spring is abutted against one end of the valve core, and the other end of the reset spring is abutted against the valve body; one end of the memory spring is contacted with the other end of the valve core, the other end of the memory spring is contacted with the end cover, and when the temperature of the memory spring rises to a specific value, the memory spring generates elastic force to drive the valve core to move against the reset force, so that the first valve port is closed; at least one part of the outer wall of the valve core is in sliding fit with the inner wall of the valve cavity, and the first inlet is arranged on the side wall of the valve body. The response time of the memory spring is faster, and the first valve port can be opened in time to switch the medium to another flow path. When applied to a cooler and a transmission, the performance of the transmission can be improved. The thermostatic valve does not need an additional thermal element and has small volume.

Description

Temperature regulating valve

Technical Field

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

Background

In a transmission of a vehicle, it is necessary to contain lubricating oil, which can perform the functions of lubrication and cooling, and the temperature of the lubricating oil affects the reliability and durability of the transmission, so that the lubricating oil needs to be controlled at a proper operating temperature.

When the temperature of the lubricating oil of the gearbox is higher, the lubricating oil is cooled by an external cooling device. The cooling device adopts a heat exchanger for cooling, and utilizes cooling water or a refrigerant to cool lubricating oil with higher temperature so as to keep the lubricating oil of the gearbox within a certain working temperature range. When the temperature of the lubricating oil is low, the lubricating oil does not need to be cooled, the lubricating oil can directly flow back to the gearbox, and does not pass through a cooling device, namely when the lubricating oil of the gearbox flows out, two paths are provided, one path is through the cooling device, and the other path is directly flowing back to the gearbox.

Currently, the switching between the two paths is performed by a thermostatic valve. The temperature regulating valve is provided with a thermal element and a spring surrounding the periphery of the thermal element, the thermal element is expanded with heat and contracted with cold according to the temperature of the heat sensitive substance, acting force is transmitted to the spring when the thermal element expands with heat, the valve core is driven to move, a path flowing through the cooling device is opened, the thermal element is reset when the thermal element contracts with cold, and a path directly flowing to the gearbox is opened.

However, the above solution has the following technical problems:

the temperature of the heat sensitive substance is sensed, the heat sensitive substance expands and contracts with cold, and then the spring acting force is given, so that a certain response time is needed, namely the response time of the thermal element is slow, the temperature of the lubricating oil generates a certain hysteresis, the performance of the transmission is affected, and the transmission is even damaged.

In addition, the thermal actuator of the heat sensitive material has a large volume, and the switching of the flow path can be realized only by matching with a spring, so that the volume of the temperature regulating valve is large.

Disclosure of Invention

The invention provides a temperature regulating valve, which aims to improve the temperature control induction time and the performance of a transmission.

The temperature regulating valve comprises an end cover, a valve body and a valve core positioned in a valve cavity of the valve body, the temperature regulating valve is provided with a first outlet, a second outlet and a first inlet communicated with the valve cavity, a first valve port capable of communicating the valve cavity with the second outlet is formed in the valve body, and when the valve core moves, the valve core can open or close the first valve port; a return spring and a memory spring are also arranged in the valve cavity, and the memory spring is made of memory alloy; the return spring provides a return force for enabling the valve core to open the first valve port; one end of the reset spring is abutted with one end of the valve core, and the other end of the reset spring is abutted with the valve body; one end of the memory spring is in contact with the other end of the valve core, the other end of the memory spring is in contact with the end cover, and the memory spring generates elastic force to drive the valve core to move against the reset force when the temperature rises to a specific value so as to close the first valve port;

at least one part of the outer wall of the valve core is in sliding fit with the inner wall of the valve cavity, and the first inlet is arranged on the side wall of the valve body.

Compared with the scheme that the spring surrounds the thermal element, the response time of the memory spring is faster, and the second valve port can be opened in time to enable the medium to be switched to another flow path. When the cooling device is particularly applied to a cooler and a transmission, the performance of the transmission can be improved, and the transmission is prevented from being damaged. Meanwhile, the temperature regulating valve does not need to be additionally provided with a thermal element, and the temperature regulating valve is simple in structure and convenient to install, so that the whole temperature regulating valve is light in weight and small in size.

Furthermore, the inlet channel between the first inlet and the valve chamber is opposite to the first valve port, so that the passage between the first inlet and the first valve port, the first outlet is a straight passage through which the medium can flow out when the second valve port is opened, and the response is faster. At least one part of the outer wall of the valve core is in sliding fit with the inner wall of the valve cavity, so that the fluid can be prevented from impacting the valve core or the memory spring to cause deviation when flowing in.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a thermostat valve provided in accordance with the present invention;

FIG. 2 is a schematic view of the trim valve of FIG. 1 from another angle, showing the bottom;

FIG. 3 is a cross-sectional view of FIG. 1 with the second port closed and the first port open;

FIG. 4 is a schematic diagram of the valve core of FIG. 3 after moving to the right, the first port being closed and the second port being open;

FIG. 5 is a schematic view of the valve body of FIG. 3;

FIG. 6 is a cross-sectional view of a second embodiment of a thermostat valve provided in accordance with the present invention, with the second port closed and the first port open;

FIG. 7 is a schematic diagram of the valve cartridge of FIG. 6 after being moved to the right, with the first port closed and the second port open;

FIG. 8 is a sectional view showing the structure of a third embodiment of a thermostat valve according to the present invention, in an initial state, in which a first valve port has a predetermined opening degree and a second valve port has a predetermined opening degree;

FIG. 9 is a schematic view of the thermostatic valve of FIG. 8 after the temperature rises to a predetermined value and the memory spring is deformed, wherein the first valve port is closed and the second valve port is opened;

FIG. 10 is a schematic view of the thermostatic valve of FIG. 9 after the temperature is decreased to below a predetermined value and the memory spring is deactivated, wherein the first port is open and the second port is closed;

FIG. 11 is a schematic structural view of the valve cartridge of FIG. 8;

FIG. 12 is a sectional view showing a configuration of a fourth embodiment of a thermostat valve according to the present invention, in an initial state, in which a first valve port has a predetermined opening degree and a second valve port has a predetermined opening degree;

FIG. 13 is a schematic view of the thermostatic valve of FIG. 12 after the temperature rises to a predetermined value and the memory spring is deformed, the first valve port is closed and the second valve port is opened;

FIG. 14 is a schematic view of the thermostatic valve of FIG. 13 after the temperature is decreased to below a predetermined value and the memory spring is deactivated, wherein the first port is open and the second port is closed;

FIG. 15 is a schematic structural view of the tip cap of FIG. 12;

FIG. 16 is a sectional view showing the structure of a fifth embodiment of a thermostat valve according to the present invention, in an initial state, in which a first valve port has a predetermined opening degree and a second valve port has a predetermined opening degree;

FIG. 17 is a schematic view of the thermostatic valve of FIG. 16 after the temperature rises to a predetermined value and the memory spring is deformed, the first valve port is closed and the second valve port is opened;

FIG. 18 is a schematic view of the thermostatic valve of FIG. 17 after the temperature is decreased to below a predetermined value and the memory spring is deactivated, wherein the first port is open and the second port is closed;

FIG. 19 is a sectional view of a sixth embodiment of a thermostat valve of the present invention, with the first port closed and the second port open;

FIG. 20 is a schematic structural view of the valve cartridge of FIG. 19;

FIG. 21 is a sectional view of a seventh embodiment of a thermostat valve provided in accordance with the present invention, with the first port closed and the second port open;

FIG. 22 is a sectional view of an eighth embodiment of a thermostat valve provided in accordance with the present invention, with the first port open and the second port closed;

FIG. 23 is a schematic view of the thermostatic valve of FIG. 22 after the memory spring is deformed by heating, the first valve port being closed and the second valve port being opened;

FIG. 24 is a schematic view of the end cap and valve core, return spring, and memory spring of FIG. 22 after installation;

fig. 25 is a perspective view of fig. 24.

FIG. 27 is a sectional view of a tenth embodiment of a thermostat valve provided in accordance with the present invention, with a first port open and a second port closed;

FIG. 28 is a schematic view of the valve cartridge of FIG. 27 after being moved to the right with the second port open and the first port closed;

fig. 29 is a schematic view of the valve cartridge of fig. 27.

The reference numerals in fig. 1-29 are illustrated as follows:

10a valve body; 10a valve cavity, 10b straight line channel, 10c small hole, 10d outlet channel and 10e inlet channel; the first valve port B and the second valve port A;

101 a first outlet, 102 a second inlet, 103 a first inlet, 104 a second outlet;

201 memory spring, 202 return spring;

30 end covers, 301 primary step surfaces and 302 secondary step surfaces;

40 valve core, 401 body, 401a end boss, 402 sleeve, 402a inlet, 402b opening, 402c notch; 403 guide bar, 405 sealing plate, 405a concave hole, 404 spherical part; 40' sealing piece;

50 external joint, 60 valve stem.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-4, fig. 1 is a schematic structural diagram of a first embodiment of a temperature regulating valve provided in the present invention; FIG. 2 is a schematic view of the trim valve of FIG. 1 from another angle, showing the bottom; FIG. 3 is a cross-sectional view of FIG. 1 with the second port closed and the first port open; FIG. 4 is a schematic diagram of the valve core of FIG. 3 after moving to the right, the first port being closed and the second port being open; fig. 5 is a schematic view of the valve body of fig. 3.

The temperature regulating valve in the first embodiment comprises a valve body 10, wherein a valve cavity 10a is formed inside the valve body 10, specifically, in this embodiment, the valve cavity 10a penetrates through one end face of the valve body 10 from left to right as shown in fig. 3 and 5, so as to form the valve cavity 10a with a port at the left end, and the port is blocked by an end cover 30. The valve chamber 10a has a valve element 40 built therein, the valve element 40 is axially movable along the valve chamber 10a, the axial direction, i.e., the direction in which one end of the valve chamber 10a extends to the other end, is the left-right direction shown in fig. 3 and 4, and when the valve body 10 is in a rectangular parallelepiped shape as shown in fig. 1 and 2, the axial direction is also the longitudinal direction of the valve body 10 or the valve chamber 10 a.

The temperature regulating valve has a first outlet 101, a second inlet 102, a second outlet 104, and a first inlet 103 communicating with the valve chamber 10a, and in this embodiment, the inlets and outlets are integrally formed on the outer wall of the valve body 10 and can be connected with an external component. In fig. 3, a first valve port B communicating the valve chamber 10a with the second outlet 104 and a second valve port a communicating the valve chamber 10a with the first outlet 101 are opened in the valve body 10. The second valve port A is specifically arranged on the side cavity wall of the valve cavity 10a, and an outlet channel 10d is arranged between the second valve port A and the first outlet 101; the first valve port B is formed on the wall of the valve chamber 10a at one end, i.e. the right end wall in fig. 3, the left end is a port blocked by the end cap 30, the first valve port B is communicated with the second outlet 104 through a second outlet 104 channel, and the second outlet 104 channel in fig. 3 comprises an orifice 10c and a straight channel 10B between the second inlet 102 and the second outlet 104.

The temperature control valve described in all the embodiments herein can be used between a transmission and a cooler, and the medium flowing inside the temperature control valve is lubricating oil. That is, the first outlet 101 of the temperature regulating valve is communicated with the inlet of the cooler, the second inlet 102 is communicated with the outlet of the cooler, the second outlet 104 is communicated with the inlet of the transmission, the first inlet 103 is communicated with the outlet of the transmission, the lubricating oil flows out from the transmission, enters the temperature regulating valve through the first inlet 103, and can directly flow back to the transmission through the first valve port B and the second outlet 104, or enters the cooler through the second valve port a and the first outlet 101, is cooled, and then flows back to the transmission through the second inlet 102 and the second outlet 104, and the following main working process is also exemplified by this application. It will be appreciated that the transmission and cooler are only typical of the applications of the thermostatic valve of the present invention, and obviously other applications requiring a temperature controlled conditioning medium flow path other than transmissions may be used.

Specifically, the valve core 40 in this embodiment can move to switch the opening and closing of the first port B and the second port a, as shown in fig. 3, the valve core 40 moves to the right to block the first port B and open the second port a; the valve core 40 moves to the left again to block the second valve port A and open the first valve port B. The opening and closing of the first valve port B and the second valve port A realize the switching of two flow paths, and when the lubricating oil is applied to a transmission and a cooler, the lubricating oil is cooled by the cooler or directly returns to the transmission without being cooled.

The valve core 40 is moved mainly by a return spring 202 and a Memory spring 201 arranged in the valve cavity 10a, and the Memory spring 201 is a spring made of Shape Memory Alloy (SMA) material. The return spring 202 can provide a return force for opening the first valve port B by the valve core 40, in this embodiment, the return spring 202 is a tension spring, that is, provides a pulling force, the direction of the pulling force of the valve core 40 provided in fig. 3 is leftward, the tension spring can play a role of connecting the valve core 40, and the valve core 40 can be processed into a structure with an i-shaped axial cross section shown in the drawing, so that the weight is reduced, and the valve core is convenient to move; when the temperature rises to a specific value, the elastic characteristic of the memory spring 201 is activated, and the memory spring has elastic potential energy so as to provide elastic force, and the direction of the elastic force is opposite to the direction of the pulling force, so that the valve core 40 is driven to move against the reset force. The specific value of the elasticity activated of the memory spring 201 can be selected according to the requirement, so that the memory spring can be heated and deformed at the environmental temperature needing to switch the path.

The working principle of this embodiment is as follows:

in the operating state shown in fig. 3, a medium (for example, lubricating oil of the transmission) flows into the valve chamber 10a of the temperature regulating valve from the first inlet 103, the first valve port B is opened due to the closing of the second valve port a, and the medium flows to the orifice 10c, the linear passage 10B and the second outlet 104 through the first valve port B and returns to the transmission;

when the temperature of the medium rises to a specific value, the medium will be in the working state shown in fig. 4, the spring characteristic of the memory spring 201 is activated, the generated elastic force is larger than the reset force of the reset spring 202, at this time, the valve core 40 moves towards the direction close to the first valve port B under the force difference of the memory spring 201 and the reset spring 202, and the valve core 40 can block the first valve port B and open the second valve port a. After flowing in from the first inlet 103, the medium enters the cooler through the second valve port a, the outlet passage 10d and the first outlet 101 for cooling, and the cooled lubricating oil flows out of the cooler, enters the valve cavity 10a from the second inlet 102, and reenters the transmission through the linear passage 10b and the second outlet 104;

after the medium is cooled to be lower than the specific value, the spring characteristic of the memory spring 201 is lost, the elastic force is reduced and disappears, the valve core 40 is away from the first valve port B under the action of the reset force of the reset spring 202, the first valve port B is opened, the second valve port a is closed, and the state shown in fig. 3 is returned. It can be seen that the memory spring 201 provided in this embodiment serves as a thermal element for driving the valve element 40 to operate, and has a simple structure.

In this embodiment, the memory spring 201 and the return spring 202 are both provided between the end cap 30 and the valve core 40, and obviously, the arrangement is not limited thereto.

Referring to fig. 6-7, fig. 6 is a cross-sectional view of a temperature regulating valve according to a second embodiment of the present invention, wherein the second port a is closed and the first port B is opened; fig. 7 is a schematic diagram of the valve core 40 in fig. 6 after moving to the right, the first port B is closed, and the second port a is opened.

This embodiment is substantially the same as the first embodiment in that a memory spring 201 is located between the end cap 30 and the valve core 40, one end of the memory spring 201 is in contact with the other end of the valve core 40, and the other end of the memory spring 201 is in contact with the end cap 30. A stepped hole is formed in the valve body 10, a large hole of the stepped hole is a valve cavity 10a, and a first valve port B is formed at the joint of the small hole 10c and the large hole. The difference is that the return spring 202 in fig. 6 provides a resilience force rather than a tensile force, that is, the return spring 202 and the memory spring 201 may be separately disposed at two ends of the valve core 40, one end of the return spring 202 abuts against one end of the valve core 40, and the other end of the return spring 202 abuts against the valve body 10 to provide an opposite acting force for the valve core 40.

Specifically, the return spring 202 is arranged in the small hole 10c, a step is arranged in the small hole 10c, the return spring 202 is pre-compressed between the valve core 40 and the step, and provides resilience for driving the valve core 40 away from the first valve port B, and the resilience is opposite to the direction of the elastic force applied to the valve core 40 by the memory spring 201. At this time, the valve core 40 may be provided with a protrusion toward the right end of the return spring 202 to be inserted into the return spring 202, so as to assemble the return spring 202 and also position and guide the valve core 40.

Of course, the small hole 10c may not have a step, and the right end of the return spring 202 directly abuts against the inner wall of the linear channel 10b, or a concave hole is provided on the inner wall of the linear channel 10b, and the right end of the return spring 202 directly abuts against the concave hole; the return spring 202 may also be precompressed between the spool 40 and the chamber wall at the right end of the valve chamber 10 a.

In addition, in the first and second embodiments, the right end of the valve core 40 is the sealing part thereof, and the first valve port B can be blocked when the valve core moves rightwards; the memory spring 201 is used as a sealing part of the second valve port a, when the medium temperature is low, the memory spring 201 can be in a compressed and tightened state and corresponds to the position of the second valve port a to seal the second valve port a, when the memory spring 201 is heated and in an expanded state, the memory spring is deformed and extended, the diameter of the memory spring 201 is reduced, a gap is formed between the memory spring 201 and the second valve port a, gaps can also be formed among a plurality of spring rings of the memory spring 201, the medium in the valve cavity 10a can flow to the second valve port a through the gaps and flow out, and at the moment, the second valve port a is opened. It can be seen that with this arrangement, the memory spring 201 not only acts as a thermal element for driving the valve core 40 to move, but also acts as a sealing portion, thereby simplifying the structure of the valve core 40.

Of course, the manner of blocking the second port a is not limited to this, and reference may be continuously made to fig. 8-11, where fig. 8 is a structural sectional view of a third embodiment of the temperature regulating valve provided by the present invention, and in an initial state, the first port B is opened to have a predetermined opening degree, and the second port a also has an initial predetermined opening degree; FIG. 9 is a schematic view of the temperature control valve of FIG. 8 after the temperature rises to a specific value and the memory spring 201 deforms, wherein the first port B is closed and the second port A is opened; FIG. 10 is a schematic view of the thermostatic valve in FIG. 9 after the temperature is decreased to below a predetermined value and the memory spring 201 loses its characteristics, the first port B is opened and the second port A is closed; fig. 11 is a schematic structural view of the valve core 40 in fig. 8.

In this embodiment, the second port a is also disposed on the side wall of the valve chamber 10a, and the first port B is disposed on the wall of the valve chamber 10a at one end. In comparison, the valve core 40 in the further embodiment is additionally provided with a sleeve portion 402, the memory spring 201 is arranged in the sleeve portion 402 and located between the end cover 30 and the valve core 40, at this time, the right end of the valve core 40 forms a first sealing portion for blocking the first valve port B, and the sleeve portion 402 on the valve core 40 forms a second sealing portion for blocking the second valve port a, specifically, the outer wall of the sleeve portion 402 can slide along the side cavity wall of the valve cavity 10a to block or open the second valve port a, at this time, the memory spring 201 only serves as a thermal actuator for driving the valve core 40 to move according to temperature changes.

For the convenience of assembling the memory spring 201, a boss is arranged on the inner end surface of the end cover 30 facing the valve core 40, and one end of the memory spring 201 is sleeved with the boss. The valve body 40 includes a main body portion 401 extending in the axial direction and a sleeve portion 402 that covers the main body portion 401, the left end of the main body portion 401 extends into the sleeve portion 402, and the other end of the memory spring 201 is fitted over the left end of the main body portion 401. The sleeve portion 402 and the main body portion 401 of the valve body 40 may be formed separately or integrally as shown in fig. 11.

In the third embodiment, a stepped hole is also formed in the valve body 10, as in the first and second embodiments, the large hole of the stepped hole is a valve chamber 10a, and the first valve port B is formed at the junction of the large hole of the stepped hole and the small hole 10 c. The right end of the body 401 of the valve body 40 is connected to a guide rod 403 as a first seal portion, the guide rod 403 may be formed separately from the body 401 or integrally with the body 401, and the guide rod 403 may be inserted into the small hole 10c to guide the movement of the valve body 40. The feature of providing the valve core 40 with the guide rod 403 to be guided by the insertion hole 10c is also applicable to other embodiments. As shown in fig. 11, the end of the valve core 40 facing the first valve port B may be hollow to reduce weight and save material.

In the second embodiment, the right end of the valve core 40 is used as a sealing part for sealing the first valve port B, a boss is arranged to be inserted into the return spring 202, and the return spring 202 is positioned in the small hole 10c and can also play a certain guiding role; however, in the third embodiment, the guide rod 403 is directly inserted into the small hole 10c for guiding, and the guiding effect is better. Because the sleeve portion 402 is provided, there is no need to form a step on the wall of the small hole 10c to mount the return spring 202, and the return spring 202 can abut between the sleeve portion 402 and the end wall of the valve chamber 10a, as shown in fig. 8.

In addition, since the valve body 40 of the third embodiment is provided with the sleeve portion 402, the sleeve portion 402 is slidably fitted to the side wall of the valve chamber 10a, and an opening 402B (lower side of the bottom in fig. 8) is provided at the bottom of the sleeve portion 402 near the first port B, so that the medium can flow into the inner cavity of the sleeve portion 402 and flow to the second port a. In order to facilitate the medium to contact the memory spring 201 more quickly and more, the bottom of the sleeve portion 402 in fig. 8 is further provided with an introduction port 402a penetrating through the bottom at a position (above the bottom in fig. 8) away from the first valve port B, and the introduction port 402a serves as a flow guide passage and communicates the valve chamber 10a with the inner cavity of the sleeve portion 402. The introduction ports 402a may be one or more in number.

It should be noted that, in the third embodiment, the left end of the main body 401 of the valve core 40 is provided with the end boss 401a, in an initial state, that is, when the valve is shipped out, one end of the memory spring 201 surrounds the end boss 401a, and abuts against a step surface formed by the end boss 401a and the main body 401, so as to serve as an initial position of the end of the memory spring 201, at this time, as shown in fig. 8, the first valve port B is not completely opened and has a preset opening degree, and the second valve port a also has an initial preset opening degree, so that the thermostat valve has a characteristic that the second valve port a is normally opened in the initial state, so that when the lubricant is filled into the transmission in the initial state, the lubricant can be filled into the cooler, and the requirement of initial filling is met. I.e. both valve ports are open.

Then, when the temperature of the lubricating oil rises to a specific value, the memory spring 201 deforms, expands to a certain extent, separates from the end boss 401a, and surrounds the main body 401 with a larger outer diameter, and the memory spring 201 is switched to a normal operating state thereafter, will always surround the main body 401, as shown in fig. 9, and deforms to abut against the bottom position of the sleeve portion 402, which is an operating position, and at this time, the first valve port B continues to be closed under the elastic force of the memory spring 201. The initial position and the working position of the end of the memory spring 201, which are described herein, refer to the relative positions of the end and the valve body 10 (the cavity wall or the end cover 30 of the valve body 10) or the valve core 40, and do not change with the movement of the valve core 40.

When the temperature is lower than a certain value, the memory spring 201 loses its characteristics, and the valve core 40 moves and compresses the memory spring 201 by the restoring force of the return spring 202. Since the distance between the bottom of the sleeve 402 and the end cap 30 is greater than the distance between the boss of the main body 401 and the end cap 30, when the memory spring 201 is separated from the boss of the main body 401 and surrounds the main body 401, the valve core 40 will be closer to the end cap 30 under the action of the return spring 202, and the sleeve 402 will block the second valve port a, eliminating the initial preset opening, as shown in fig. 10.

It is understood that this embodiment provides an arrangement in which a two-step (a step surface between the end boss 401a and the main body portion 401, and a two-step surface at the bottom of the sleeve portion 402) is provided on the valve body 40, and the two-step surfaces form the initial position and the operating position, respectively. When the memory spring 201 is located at the initial position, the first valve port B has a preset opening degree, and when the memory spring 201 is located at the initial position, the distance between the valve core 40 and the first valve port B is smaller than the distance between the valve core 40 and the first valve port B when the memory spring 201 is located at the working position and the temperature is below a specific value.

Under the condition that the position of the valve core 40 is fixed, the distance between the initial position and the end cover 40 is smaller than that between the working position and the end cover 40, so that the memory spring 201 is in any temperature environment (not influenced by a specific value), the first valve port B is kept in a closed state, and the second valve port A has a preset opening degree (if the second valve port A is not arranged, the medium can directly flow to the first outlet 104). After the working position, the distance between the end cover 30 and the working position of the valve core 40 is longer, so that the return spring 202 can drive the valve core 40 to compress the memory spring 202 for a longer distance, and thus the first valve port B is opened, and the second valve port a can be closed.

It can be understood that the initial position and the working position are set by adjusting the distance between the valve core 40 and the end cover 30 or the valve body 10, so that the distance between the two ends of the memory spring 201 can be compressed to different degrees in the two working positions, thereby closing or opening the first valve port B. Therefore, the initial position and the working position can be set to the valve core 40 or the valve body 10, and the two steps can be realized, and the valve core 40 and the valve body 10 can be set to the initial position and the working position, or the valve core 40 and the end cover 30 can be set to the initial position and the working position, so that the two end parts of the memory spring 201 can be abutted to the initial position or the working position.

In the above embodiments, the first outlet 101, the second inlet 102, the second outlet 104 and the first inlet 103 are all disposed on the sidewall of the valve body 10, the first valve port B is disposed on the end chamber wall of the valve chamber 10a, and the second valve port a is disposed on the side chamber wall of the valve chamber 10 a. The second outlet 104 is opposite to the second inlet 102, a linear channel 10B is formed therebetween (the linear channel 10B is also formed in other embodiments described below), and the first valve port B is communicated to the linear channel 10B, specifically, the linear channel 10B is communicated through the small hole 10c of the stepped hole in the above embodiments. So configured, the first inlet 103 and the second inlet 102 may share a passage to the second outlet 104, thereby simplifying the structure and facilitating the manufacturing process. Of course, other arrangements are possible.

The arrangement of the inlet, the outlet and the valve port of the temperature regulating valve can also have other modes.

Referring to fig. 12-15, fig. 12 is a cross-sectional view of a fourth embodiment of a temperature regulating valve according to the present invention, in an initial state, a first valve port B has a predetermined opening degree, and a second valve port a has a predetermined opening degree; FIG. 13 is a schematic view of the temperature control valve of FIG. 12 after the temperature rises to a specific value and the memory spring 201 deforms, wherein the first port B is closed and the second port A is opened; FIG. 14 is a schematic view of the thermostatic valve in FIG. 13 after the temperature is decreased to below a predetermined value and the memory spring 201 loses its characteristics, the first port B is opened and the second port A is closed; fig. 15 is a schematic structural view of the end cap 30 of fig. 12.

In this embodiment, the end cap 30 actually not only covers the port position of the valve body 10, but also becomes an adapter structure as an interface for communicating with the outside, in this embodiment, specifically, a cooler. The adapter is provided with a passage through the interior and exterior of the adapter, which passage forms an outlet passage 10d, the inner port of the outlet passage 10d being said second valve port a and the outer port being the first outlet 101. At this time, the second port a and the first port B are distributed along the axial direction of the valve chamber 10a, so that during the movement of the valve core 40, one end thereof may be a first sealing portion to seal the first port B, and the other end thereof may be a second sealing portion to seal the second port a. So set up, the shutoff of case 40 to first valve port B and second valve port A, it is comparatively convenient in the operation, and case 40 is changeed in the processing. In this embodiment, in addition to the end cap 30 being an adapter structure to form the first outlet 101 of the temperature control valve, the second outlet 104, the second inlet 102 and the first inlet 103 are also formed on the valve body 10 and externally connected with the joint 50, while as in the first to third embodiments, the outlet and the inlet connected with the outside are directly formed on the valve body 10 to form a joint-like structure, and both of these solutions are applicable to all embodiments of this solution.

In addition, in the fourth embodiment, the setting of the initial preset opening degree is also performed. As can be understood by referring to fig. 15, the inner end of the adapter facing the valve core 40 is provided with two steps, the outer diameter of the first step is smaller than that of the second step, and a first step surface 301 and a second step surface 302 facing the valve core 40 are respectively formed, and the first step surface and the second step surface are respectively an initial position and a working position. The distance of the valve spool 40 from the initial position is smaller than the distance of the valve spool 40 from the working position. Thus, in an initial state of leaving a factory, the left end of the memory spring 201 is wound around the first-stage step of the valve core 40 and abuts against the first-stage step surface 301, at this time, the first valve port B is closed, and the second valve port a has an initial preset opening degree, as shown in fig. 12, so that the thermostat valve has the characteristic that the second valve port a is normally opened in the initial state, and therefore lubricating oil can be injected into a cooler while the transmission is filled with lubricating oil in the initial state, and the requirement of initial filling is met. Of course, when the second valve port a is not provided, the memory spring 201 abuts on the initial position, the first valve port B is closed, and the lubricating oil can flow to the first outlet 101 as a direct current and be injected into the cooler.

Then, when the temperature of the lubricating oil rises to a specific value, the memory spring 201 deforms, and expands to a certain extent, so that the memory spring 201 is separated from the first step and surrounds the second step, and the memory spring 201 is switched to a normal working position and will surround the second step all the time, as shown in fig. 13, the memory spring 201 also deforms and abuts against the second step surface 302, and at this time, the first valve port B continues to be closed under the elastic force of the memory spring 201.

When the temperature is lower than a certain value, the memory spring 201 loses its characteristics, and the valve core 40 moves and compresses the memory spring 201 by the restoring force of the return spring 202. Because the distance between the secondary step surface 302 and the valve core 40 is greater than the distance between the primary step surface 301 and the valve core 40, after the memory spring 201 is separated from the primary step and surrounds the secondary step, the valve core 40 is further close to the end cover 30 under the action of the return spring 202, the left end of the valve core 40 blocks the second valve port a, the initial preset opening degree is eliminated, and the first valve port B is in an open state at this time.

In the fourth embodiment, the outer periphery of the end (left end in fig. 12, i.e. the second sealing portion) of the valve core 40 facing the second valve port a is tapered, i.e. has a tapered surface matching with the second valve port a, so as to better block the second valve port a, and has a guiding function, at this time, in order to facilitate interference with the memory spring 201, the left end of the valve core 40 is further provided with a circumferential protrusion, as shown in fig. 12, the right end of the memory spring 201 abuts against the circumferential protrusion. The end of the valve core 40 facing the first port B (the right end in fig. 12, i.e., the first seal portion) has a boss that is insertable into the return spring 202. The return spring 202 is placed in the aperture 10 c.

The valve core 40 may have other structures, as shown in fig. 16-17, fig. 16 is a structural sectional view of a fifth embodiment of a temperature regulating valve provided by the present invention, and in an initial state, the first valve port B has a preset opening degree, and the second valve port a has a preset opening degree; FIG. 17 is a schematic view of the temperature control valve of FIG. 16 after the temperature rises to a specific value and the memory spring 201 deforms, wherein the first port B is closed and the second port A is opened; fig. 18 is a schematic diagram of the thermostatic valve in fig. 17 after the temperature is reduced to below a predetermined value and the memory spring 201 loses its characteristics, the first port B is opened and the second port a is closed.

In this embodiment, as in the fourth embodiment, the only difference is the structure of the valve core 40, and the valve core 40 is a spherical body, so that the spherical valve core 40 can achieve a better blocking effect when the first port B and the second port a are blocked. In other embodiments, the ball valve core 40 may be used, or at least the plugging portion may be machined to be spherical.

In the fifth embodiment, two steps are also provided on the end cover 30 of the adapter structure, so that the memory spring 201 has an initial shape, which forms an initial preset opening degree, and facilitates the injection of the cooling oil into the cooler.

With regard to the structure of the valve core 40, it can be understood by referring to fig. 19 continuously, fig. 19 is a structural sectional view of a sixth embodiment of the temperature regulating valve provided by the present invention, wherein the first port B is closed and the second port a is opened; fig. 20 is a schematic structural view of the valve core 40 of fig. 19.

In this embodiment, the same as the fourth and fifth embodiments, except that the valve core 40 includes a spherical portion 404 and a seal plate 405 connected to each other. The spherical portion 404 is used for sealing the second valve port a, and the sealing plate 405 is used for sealing the first valve port B. A concave hole 405a is formed in one surface, facing the spherical part 404, of the sealing plate 405, so that the spherical part 404 can be partially embedded into the concave hole 405a for fixation, and the fixation of the spherical part 404 and the concave hole 405a is facilitated; the other side of the sealing plate 405 is provided with a protrusion for inserting into the return spring 202, so as to perform the functions of positioning, guiding and facilitating the installation of the return spring 202. At this time, the spherical portion 404 does not need to simultaneously seal two ports, and the memory spring 201 is located between the end cap 30 and the sealing plate 405.

Referring to fig. 21, fig. 21 is a sectional view of a seventh embodiment of a thermostat valve provided in the invention, in which a first valve port B is closed and a second valve port a is opened.

This embodiment is also different from the fourth to sixth embodiments only in the structure of the valve spool 40. The valve core 40 is cylindrical, two end faces of the valve core are respectively used for sealing the first valve port B and the second valve port a, and a protrusion is also arranged on one face facing the first valve port B so as to be inserted into the return spring 202, thereby positioning, guiding and facilitating the installation of the return spring 202.

Referring to fig. 22-25, fig. 22 is a structural sectional view of an eighth embodiment of a temperature regulating valve provided by the present invention, wherein a first valve port B is opened and a second valve port a is closed; fig. 23 is a schematic view of the thermostatic valve of fig. 22 after the memory spring 201 is deformed due to temperature rise, in which the first port B is closed and the second port a is opened; FIG. 24 is a schematic view of the end cap 30 and valve core 40 of FIG. 22 with the return spring 202 and memory spring 201 installed; fig. 25 is a perspective view of fig. 24.

In contrast to the fourth to seventh embodiments, the second port a is also opened in the end cover 30 (the end cover does not adopt the adapter structure), but the first outlet 101 is still provided on the sidewall of the valve body 10. At this time, the end cover 30 and the valve body 10 are opened with an outlet passage 10d communicating the first outlet 101 and the second port a, and the outlet passage 10d is substantially in an "L" shape as shown in fig. 22. Similar to the positions of the second valve ports a in the fourth to seventh embodiments, the valve core 40 is more convenient to move and block.

In addition, in this embodiment, the end cap 30 is provided with an insertion hole, the thermostatic valve is further provided with a valve rod 60, one end of the valve rod 60 can be axially inserted into the insertion hole for fixation, the other end extends out of the end cap 30, and the other end of the valve rod 60 extending out of the end cap 30 can be inserted into the valve core 40 and is in sliding fit with the valve core 40. In this way, the valve core 40 can move along the valve rod 60 during the moving process, thereby achieving good positioning and guiding effects.

As shown in fig. 24 and 25, the end cap 30 defines an annular channel around its periphery to facilitate the flow of media to the first outlet 101. In fig. 24, the left end of the end cap 30 is used for sealing the left end port of the valve chamber 10a, the right end forms the second valve port a, and a connecting body is arranged between the two, and the valve rod 60 is inserted into the left end from the second valve port a. The left end part, the right end part and the connecting body of the end cover 30 are integrally formed, the structure is reliable, the valve rod 60 and the memory spring 201 are reliably installed, and the valve rod and the memory spring can be assembled and then installed in the valve cavity 10 a. Of course, the left end, the right end and the connecting body of the end cap 30 may be connected together separately.

Obviously, the valve stem 60 is also applicable to other embodiments, and for the embodiment in which the first outlet 101 is provided in the end cap 30 of the adapter structure, as shown in fig. 19, the valve stem may be inserted into the passage of the end cap 30, and the end of the valve stem may be fixed to the side wall of the passage by a connecting member.

It should be noted that the valve rod 60 of the eighth embodiment is fixed to the end cap 30, and it is understood that the valve rod 60 may also be fixed to the valve core 40 and slidably engaged with the end cap 30, and compared to that, the valve rod 60 is fixed to the end cap 30, so that the valve core 40 operates more smoothly and reliably.

The valve core 40 may be provided with a through hole therein to facilitate sliding movement along the stem 60. In addition, a seal piece 40 'is provided on the outer peripheral wall of the right end of the valve body 40, and the seal piece 40' serves as a first seal portion for blocking the first valve port B. In order to install the return spring 202, the outer peripheral wall at the right end of the valve core 40 is further provided with an annular groove, one end of the return spring 202 is embedded in the annular groove, and the other end of the return spring abuts against the step of the small hole 10c, and of course, the return spring can also directly abut against the inner wall of the linear channel 10b or the end cavity wall of the valve cavity 10a, as described in the above embodiments, which is not described in detail.

The sealing plate 40' may be integrally formed with the valve body 40, as shown in fig. 25, and fig. 25 is a sectional view of a ninth embodiment of the temperature control valve provided in the present invention, in which the first port B is closed and the second port a is opened. The seal 40 ' is more reliably strengthened when it is integrally formed with the valve core 40. the return spring 202 can be directly abutted against the seal 40 ', and the return spring 202 shown in fig. 25 is pre-compressed against the step of the small hole 10c and the seal 40 '. Various modified designs are made on the valve core 40 in the embodiments of the invention, and the structure of the valve core 40 in the embodiments can be replaced and used.

It should be noted that, for each embodiment, when the first inlet 103 is disposed on the side wall of the valve body 10, in order to improve the reliability of the movement of the valve core 40, the valve core 40 may be designed to have at least a portion in sliding fit with the inner wall of the valve cavity 40, so as to prevent the fluid from impacting the valve core 40 or the memory spring 201 when flowing in.

With continuing reference to fig. 27-29, fig. 27 is a cross-sectional view of a tenth embodiment of a thermostatic valve provided in the present invention, wherein the first port B is open and the second port a is closed; FIG. 28 is a schematic diagram of the valve core 40 of FIG. 27 after moving to the right, with the second port A open and the first port B closed; fig. 29 is a schematic view of the valve cartridge 40 of fig. 27.

In this embodiment, the valve core 40 moves axially along the valve chamber 10a and is partially in sliding engagement with the inner wall of the valve chamber 10 a. The first valve port B is located at the end chamber wall of the valve chamber 10a, i.e. the axial chamber wall, and the second valve port a is located at the side chamber wall of the valve chamber 10a, i.e. the radial chamber wall. In this embodiment, the first inlet 103 is opposite to the second port a, and specifically, the inlet passage 10e connecting the first inlet 103 and the valve chamber 10a is opposite to the second port a and the outlet passage 10 d. Thus, the passage between the first inlet 103 and the first outlet 101 is a straight passage through which the medium can flow out when the second valve port a is open, as shown in fig. 28, and the response is faster.

The valve body 40 of this embodiment has a structure similar to that of the third embodiment, and the valve body 40 includes a sleeve portion 402 as a second seal portion for closing the second port a. The memory spring 201 is disposed within the sleeve portion 402 between the valve core 40 and the end cap 30. Of course, other valve core 40 configurations are possible, or the second port a may be blocked by the memory spring 201.

In the tenth embodiment, the edge of the open end of the sleeve portion 402 is provided with a notch 402c as a drainage channel for the introduction medium into the sleeve portion 402. As shown in fig. 27, when the sleeve portion 402 blocks the second port a, the medium can enter the sleeve portion 402 through the notch 402c, so that the memory spring 201 can contact the medium after the temperature is raised in time and deform in time. It will be appreciated that the drainage channel is not limited to the notch 402c shown in the figures, and may be formed, for example, by an opening in the sidewall or bottom of the sleeve portion 402.

It should be noted that, the outlet passage 10d and the inlet passage 10e of this embodiment are oppositely arranged, and when the sleeve part 402 is in sliding fit with the inner wall of the valve chamber 10a, in order to avoid blocking the passage between the medium and the first valve port B, in fig. 27, the part of the outer wall of the sleeve part 402 corresponding to the second valve port a is in sliding fit with the inner wall of the valve chamber 10a, and gaps are provided between the part of the outer wall of the sleeve part 402 corresponding to the inlet passage 10e and the first inlet 103 and the inner wall of the valve chamber 10a, so as to ensure that the medium can flow to the first valve port B. That is, the second sealing portion only needs to seal the second valve port a, and the portion facing the inlet passage 10e needs to have a clearance with the inner wall of the valve chamber 10 a. As shown in fig. 27, the central axis of the valve chamber 10a is offset from the central axis of the valve core 40, and the portion of the valve chamber 10a corresponding to the inlet passage 10e is concave, but it is understood that the valve chamber 10a may not be concave, and the valve core 40 may be arranged in an eccentric configuration with respect to the axis. The valve core 40 is partially matched with the inner wall of the valve cavity 10a in a sliding mode, so that the shock resistance is met, and the fluid circulation is facilitated.

In addition, a two-stage stepped hole is formed in the valve body 10 of the temperature regulating valve in the embodiment, the largest hole is the valve cavity 10a, and the joint of the middle hole and the largest hole forms a first valve port B. With such an arrangement, the stroke of the valve core 40 for moving and blocking the first valve port B is shortened, and of course, a stepped hole including a large hole and a small hole may also be provided as in the above-described embodiment.

The second inlet 102 and the second outlet 104 of this embodiment are also opposite to each other, forming a straight passage 10b therebetween, and the return spring 202 extends through the smallest hole and is compressed between the valve core 40 and the inner wall of the straight passage 10b, which may be provided with a groove for the end of the return spring 202 to engage, obviously compressed against the end wall of the valve chamber 10a, or provided with a step at the smallest hole, compressed against both the step and the valve core 40.

It should be noted that, in the above embodiment, the valve cavity 10a is formed as a cavity body having a port at one end, the end cap 30 is disposed at the port, and the memory spring 201 is disposed between the end cap 30 and the valve core 40. This facilitates machining of the valve cavity 10a on the valve body 10, but it will be appreciated that the valve cavity 10a is not so limited in construction. For example, when a casting process is used, the valve chamber 10a may have no ports at both ends, and no end caps are provided, so that the memory spring 201 and the return spring 202 (the first embodiment) may be provided between the chamber wall of the valve chamber 10a and the valve core 40.

As can be seen from the embodiment of the preset opening degree, the purpose of the two-step is to utilize the characteristics of the memory spring 201, and to switch from the initial position to the working position after the temperature rise expansion deformation and keep the two-step at the working position. Therefore, the purpose of setting the initial preset opening degree can be achieved without being limited to the provision of the two-step, for example, by providing the annular groove at the end of the valve element 40, and the end of the memory spring 201 is surrounded by the annular groove, and is separated from the annular groove after the temperature is increased, and abuts against other positions as the working position.

In the above embodiment, the control element for moving the thermostatic valve control valve core 40 is the memory spring 201, and compared with the scheme that the spring surrounds the thermal element, the response time of the memory spring 201 is faster, and the second valve port a can be opened in time to switch the medium to another flow path. When the cooling device is particularly applied to a cooler and a transmission, the performance of the transmission can be improved, and the transmission is prevented from being damaged.

Meanwhile, the temperature regulating valve does not need to be additionally provided with a thermal element, and the temperature regulating valve is simple in structure and convenient to install, so that the whole temperature regulating valve is light in weight and small in size.

In the above embodiments, the valve body 10 is described as having the first port B and the second port a, but it should be understood that the second port a may not be provided. Taking the application to a transmission and a cooler as an example, when the first valve port B is closed, a medium (such as lubricating oil) can directly flow to the cooler; when the first valve port B is open, even if there is no second valve port a, only the outlet channel connected to the first outlet 101 is provided, since the cooler is connected to the first outlet 101, the flow resistance of the flow path of the first outlet 101 is greater than the flow resistance of the flow path directly flowing to the second outlet 104 through the first valve port B, and therefore, most of the medium flows to the second outlet 104 through the first valve port B. Certainly, the second valve port A is arranged to be switched with the first valve port B in an opening and closing state, so that the flow paths of the medium under different requirements can be more clearly distributed, and the internal leakage of the system is reduced.

In addition, when the second valve port a is not provided, in the mentioned initial position and working position embodiments, it can be designed that when the memory spring 201 is in the initial position, the first valve port B is closed, so that the lubricating oil can directly flow into the cooler from the first outlet 101 to play a role of filling the cooler with the lubricating oil in the initial state. Meanwhile, the second inlet 102 should be arranged, and the first valve port B is also communicated with the second inlet 102, so that the lubricating oil flowing from the second inlet 102 can also fill a passage between the first valve port B and the transmission, and the oil filling process of the whole system is completed.

When the second port a is provided, the first port B may have a predetermined opening degree as described in the above embodiment, and may also be closed, and when closed, the second inlet 102 communicating with the second outlet 104 is preferably provided in the valve body 10 of the thermostat valve, so that the lubricating oil flowing from the second inlet 102 can also fill the passage between the first port B and the transmission. Of course, when the first port B has a predetermined opening in the initial position, the first port B and the passage before the transmission may be filled, and the valve body 10 is not limited to the second inlet 102, and the outlet of the cooler may be connected to the transmission through another passage.

Whether or not the second valve port a is provided, when the cooler is convenient to fill in the initial state, the following settings are set: the distance between the valve core 40 and the first valve port B when the memory spring 201 is located at the initial position is smaller than the distance between the valve core 40 and the first valve port B when the memory spring 201 is located at the working position and the temperature is below a certain value. Thus, when the memory spring 201 is below a specific temperature, the lengths are different, and the first valve port B and/or the second valve port A have different opening degree adjustments at the initial and working positions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A temperature regulating valve comprises an end cover, a valve body and a valve core positioned in a valve cavity of the valve body, wherein the temperature regulating valve is provided with a first outlet, a second outlet and a first inlet communicated with the valve cavity, a first valve port capable of communicating the valve cavity and the second outlet is formed in the valve body, and when the valve core moves, the valve core can open or close the first valve port; it is characterized in that the preparation method is characterized in that,

a return spring and a memory spring are also arranged in the valve cavity, and the memory spring is made of memory alloy; the return spring provides a return force which enables the valve core to open the first valve port; one end of the reset spring is abutted with one end of the valve core, and the other end of the reset spring is abutted with the valve body; one end of the memory spring is in contact with the other end of the valve core, the other end of the memory spring is in contact with the end cover, and the memory spring generates elastic force to drive the valve core to move against the reset force when the temperature rises to a specific value so as to close the first valve port;

at least one part of the outer wall of the valve core is in sliding fit with the inner wall of the valve cavity, and the first inlet is arranged on the side wall of the valve body;

the temperature regulating valve is also provided with a second valve port, and the second valve port is arranged on the side cavity wall of the valve cavity and is opposite to the first inlet; the valve core comprises a first sealing part and a second sealing part, wherein the first sealing part and the second sealing part are used for respectively sealing the first valve port and the second valve port; the part of the second sealing part facing the first inlet is provided with a gap with the inner wall of the valve cavity.

2. A thermostat valve according to claim 1, wherein said valve element is provided with a sleeve portion, and one end of said memory spring is extended into said sleeve portion from an open end of said sleeve portion;

the sleeve part forms the second sealing part, the part of the outer wall of the sleeve part corresponding to the second valve port can block the second valve port, and a gap is arranged between the part of the outer wall of the sleeve part corresponding to the first inlet and the inner wall of the valve cavity.

3. The thermostat valve as claimed in claim 2, wherein the valve core or the end cap is provided with an initial position and a working position, at least one end of the memory spring is located at the initial position of the valve body or the valve core, and when the memory spring is located at the initial position, the first valve port is in a closed state or has a preset opening degree; when the temperature of the memory spring is raised to a specific value, the end part can be separated from the initial position and kept at the working position after deformation;

in the working position, the memory spring generates elastic force when the temperature rises to a specific value so as to drive the valve core to move against the reset force and close the first valve port; after the memory spring is cooled to a temperature below the specific value, the memory spring loses characteristics, and the return spring drives the first valve port to open.

4. A thermostatic valve according to claim 2 wherein said sleeve portion outer wall defines a flow path for fluid communication between said valve chamber and said sleeve portion inner chamber.

5. A tempering valve according to claim 4, wherein the edge of the sleeve portion open end is provided with notches, said notches forming said drainage flow path.

6. The thermostat valve as claimed in any one of claims 1-5, wherein a secondary stepped bore is formed in the valve body, the largest bore is the valve chamber, and the junction of the intermediate bore and the largest bore forms the first port; the valve body is provided with a first outlet, a first inlet communicated with the first outlet is arranged on the side wall of the valve body, the first outlet and the first inlet are arranged oppositely, a linear channel is formed between the first outlet and the first inlet, and the return spring penetrates through a minimum hole of the secondary stepped hole and is compressed between the valve core and the inner wall of the linear channel.

7. A thermostat valve according to claim 6, characterized in that the inner wall of the rectilinear channel is provided with a recess in which one end of the return spring is located.

8. A tempering valve according to any of claims 1-5, further provided with a second inlet communicating with said second outlet, said first outlet, said second inlet, said second outlet, said first inlet being provided in a side wall of said valve body; the second outlet is opposite to the second inlet, a linear channel is formed between the second outlet and the second inlet, and the first valve port is communicated with the linear channel.

9. A thermostat valve according to any one of claims 1-5, characterized in that a second inlet is provided in communication with the second outlet, the first outlet and the second inlet being connected to a cooler inlet and a cooler outlet, respectively; the first inlet and the second outlet are connected to a variator outlet and a variator inlet, respectively.