CN107304834B - Temperature control system - Google Patents

Abstract

The invention discloses a temperature control system, which comprises a temperature regulator, a heat exchanger and a gearbox, wherein the temperature regulator comprises four interfaces, and the temperature regulator comprises a valve body with a cavity arranged therein, an end cover assembly, a thermal element and a first spring; the first interface of the thermostat is communicated with the second fluid interface of the gearbox, the fourth interface of the thermostat is communicated with the first fluid interface of the gearbox, the second interface of the thermostat is communicated with the second fluid interface of the heat exchanger, the third interface of the thermostat is communicated with the first fluid interface of the heat exchanger, the temperature regulating valve comprises a first valve port and a second valve port, and the first interface is communicated with a space between the first valve port and the second valve port of the cavity; in the axial direction of the valve body, the first valve port is positioned between the first interface and the third interface of the valve body, and the second valve port is positioned between the first interface and the second interface of the valve body. Therefore, when the system has abnormal high pressure, the force generated by the pressure difference can overcome the spring force applied to the thermal element to act so as to complete pressure relief.

Description

Temperature control system

Technical Field

The invention relates to the field of fluid control, in particular to a temperature control system with a thermostat.

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 is affected. The lubricating performance of the lubricating oil is greatly related to the temperature of the lubricating oil, when the temperature of the lubricating oil is too high or too low, the lubricating performance of the lubricating oil is affected, and a vehicle system generally adopts a temperature control system to control the lubricating oil.

The temperature of the lubricating oil is generally not excessively high during normal running, and when the vehicle is overloaded or set in a four-wheel drive mode for snow running or off-road running, the temperature of the transmission oil may be excessively high and the lubricating performance may be deteriorated if the vehicle runs under a transient slip condition of the torque converter.

The gearbox oil mainly realizes the temperature regulation function through a temperature control flow path formed by a temperature regulator and an external cooling heat exchange device. When the temperature of the oil way of the gearbox rises, the thermosensitive substance of the thermal element is heated to expand, the gearbox oil 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 actuator begin to solidify and contract, the ejector rod resets, and the channel for directly flowing the gearbox oil back to the gearbox is opened. The oil in the oil way of the gearbox exchanges heat with the heated gearbox components in the flowing process, so that the oil temperature is controlled in a proper range. However, the temperature control system sometimes has an abnormality, for example, the oil passage is blocked to cause a poor flow, which may cause an abnormal pressure in the temperature control system.

Disclosure of Invention

The technical scheme of the invention is to provide a temperature control system which can be applied to the condition of system pressure abnormity. The temperature control system comprises a thermostat, a heat exchanger and a gearbox, wherein the thermostat comprises four interfaces: the thermostat comprises a valve body with a cavity arranged therein, an end cover assembly, a thermal element positioned in the cavity and a first spring; the heat exchanger comprises a first fluid interface and a second fluid interface, and the gearbox comprises a first fluid interface and a second fluid interface; the first interface of the thermostat is communicated with the second fluid interface of the gearbox, the fourth interface of the thermostat is communicated with the first fluid interface of the gearbox, the second interface of the thermostat is communicated with the second fluid interface of the heat exchanger, and the third interface of the thermostat is communicated with the first fluid interface of the heat exchanger; the cavity of the thermostat comprises a first cavity and a second cavity, the second cavity is smaller than the first cavity, and the second cavity is far away from the end cover assembly relative to the first cavity; the valve body is also provided with a third cavity, and the third port and the fourth port are communicated with the second cavity through the third cavity; the temperature regulating valve comprises a first valve port and a second valve port, and the first interface is communicated with a space, positioned between the first valve port and the second valve port, of the first cavity; the first valve port is positioned at a position of the second cavity relatively close to the first cavity or the first valve port is positioned at a position of the first cavity relatively close to the second cavity; in the axial direction of the valve body, the first valve port is located between the first interface and the third interface of the valve body, and the second valve port is located between the first interface and the second interface of the valve body.

The first fluid interface of the heat exchanger is used as an inlet of fluid of the heat exchanger, the second fluid interface of the heat exchanger is used as an outlet of the fluid of the heat exchanger, the first fluid interface of the gearbox is used as a fluid outlet of the gearbox, and the second fluid interface of the gearbox is used as a fluid inlet of the gearbox; the operation process of the temperature control system also comprises an abnormal pressure relief working condition, when the pressure of the second cavity of the thermostat is higher than that of the first cavity, the thermal element is separated from the first valve port by the force generated by the pressure difference of the second cavity and the first cavity, and the first valve port is opened.

The thermal element of the thermostat comprises a top rod and a body part, and the first spring is at least partially or completely positioned in the second cavity; the thermal element is mostly or entirely located in the first cavity, which is larger than the thermal element; one end of the thermal element is abutted or indirectly abutted or supported with one end, close to the thermal element, of the first spring, and the other end of the thermal element is limited in the end cover assembly; and the temperature regulating valve is also provided with a guide part in the cavity, the thermal element comprises a guide matching part matched with the guide part, and the guide part is in sliding fit with the guide matching part.

The thermostat may include a first valve seat and a second valve seat fixedly disposed, the first valve seat having the first valve port, the second valve seat having the second valve port; the first valve seat is positioned at a part of the second cavity, which is relatively close to the first cavity, or the first valve seat is positioned at a part of the first cavity, which is relatively close to the second cavity; the thermal valve element further comprises a first valve core and a second valve core, wherein the first valve core is arranged opposite to the first valve seat, the second valve core is arranged opposite to the second valve seat, the first valve core and the body part of the thermal valve element are of an integral structure or fixedly arranged, the end cover assembly comprises a valve seat part, a guide part and a first connecting part, the valve seat part is connected through the first connecting part, and the second valve seat is arranged on the valve seat part.

The inner diameter of the guide part of the thermostat is larger than the guide matching part of the thermal actuator, the inner diameter of the guide part is 0.05-0.5mm larger than the outer diameter of the guide matching part of the thermal actuator, and the length of the guide part of the end cover assembly or the length of the guide matching part of the thermal actuator is larger than the stroke of the thermal actuator which can act in the cavity.

The end cover assembly of the thermostat can comprise a valve seat part, a guide part, a second connecting part and a first connecting part, wherein the guide part and the valve seat part are of a roughly annular structure, an inner hole of the valve seat part is smaller than an inner hole of the guide part, and the outer diameter of the valve seat part is larger than the outer diameter of the guide part; the first connecting portion connects the guide portion and the valve seat portion, the valve seat portion is located between the first connecting portion and the second connecting portion, and the guide portion is close to the first valve port with respect to the valve seat portion; the body of the thermal actuator comprises an outer wall portion, the outer wall portion is the guide matching portion, and the inner diameter of the guide portion is larger than the outer diameter of the outer wall portion of the thermal actuator.

The end cover assembly of the thermostat can comprise an end cover, a spring seat and a second spring, wherein the end cover is provided with an accommodating cavity, the second spring and the spring seat are positioned in the accommodating cavity, the spring seat is limited in the accommodating cavity through a check ring or other limiting devices fixedly arranged with the end cover, one end of the second spring abuts against the accommodating cavity, and the other end of the second spring abuts against the spring seat; the spring seat is sleeved at the end part of a top rod of the thermal element, and the top rod part extends into an inner cavity of the spring seat; the end cover comprises a valve seat portion, a guide portion and a first connecting portion, the first connecting portion is connected with the guide portion and the valve seat portion, and the first connecting portion is located between the guide portion and the valve seat portion.

The end cover assembly of the thermostat can comprise a second spring, a cover body, a base body and a spring seat, wherein the cover body and the base body are relatively fixed through thread fit, the cover body and the base body are matched to form an accommodating cavity for arranging the second spring and the spring seat, the base body is provided with a step part for abutting against the spring seat, the second spring and the spring seat are positioned in the accommodating cavity, one end of the second spring abuts against the cover body, and the other end of the second spring abuts against the spring seat; the pedestal includes valve seat portion, guide part, first connecting portion connect the guide part with valve seat portion, first connecting portion are located the guide part with between the valve seat portion.

The end cover assembly of the thermostat can comprise a second spring, a cover body, a base body and a spring seat, wherein the cover body comprises an accommodating cavity for arranging the second spring and the spring seat, the accommodating cavity is provided with a groove for arranging a retainer ring, the retainer ring is partially arranged in the groove to realize axial limiting, the spring seat is abutted against the retainer ring, the second spring and the spring seat are arranged in the accommodating cavity, one end of the second spring is abutted against the cover body, and the other end of the second spring is abutted against the spring seat; the seat body comprises a valve seat part, a guide part and a first connecting part, wherein the first connecting part is connected with the guide part and the valve seat part, and is positioned between the guide part and the valve seat part; the seat body and the cover body are fixedly arranged, or the seat body and the cover body are tightly matched, or one or both of the seat body and the cover body are provided with a limiting structure for preventing the seat body from moving towards the direction of the cover body, and the valve body is provided with a limiting step part at the part of the cavity matched with the seat body for preventing the seat body from moving towards the direction of a first valve port in the cavity.

The end cover assembly of the thermostat can comprise a second spring, a cover body, a base body and a spring seat, wherein the cover body comprises an accommodating cavity for arranging the second spring and the spring seat, the accommodating cavity is provided with a groove for arranging a retainer ring, the retainer ring is partially arranged in the groove to realize axial limiting, the spring seat is abutted against the retainer ring, the second spring and the spring seat are arranged in the accommodating cavity, one end of the second spring is abutted against the cover body, and the other end of the second spring is abutted against the spring seat; the seat body comprises a valve seat part, a guide part and a first connecting part, wherein the first connecting part is connected with the guide part and the valve seat part, and is positioned between the guide part and the valve seat part; the seat body and the cover body are fixedly arranged, or the seat body and the cover body are tightly matched, or one or both of the seat body and the cover body are provided with a limiting structure for preventing the seat body from moving towards the direction of the cover body, and the valve body is provided with a limiting step part at the part of the cavity matched with the seat body for preventing the seat body from moving towards the direction of a first valve port in the cavity; the guide portion is arranged close to the cover body relative to the valve seat portion, and a push rod of the thermal actuator serves as a guide matching portion matched with the guide portion.

When the temperature control system is connected with the temperature regulator for use, the pressure relief function can be realized when the system pressure is abnormal, and a pressure relief device does not need to be additionally arranged.

Drawings

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

Fig. 2 is a schematic sectional view of the thermostat of fig. 1 in an operating state.

Fig. 3 is a schematic cross-sectional view of the thermostat of fig. 1 in another operating state.

Fig. 4 is an enlarged partial schematic view of the thermostat of fig. 2.

Fig. 5 is an enlarged partial schematic view of the thermostat of fig. 3.

Fig. 6 is a schematic perspective view and a schematic cross-sectional view of the end cap shown in fig. 2 and 3.

Fig. 7 is a schematic cross-sectional view of the valve body shown in fig. 2 and 3.

FIG. 8 is a schematic cross-sectional view of an end cap assembly of a thermostat of another embodiment of the present invention.

FIG. 9 is a perspective and cross-sectional schematic view of an end cap assembly of a thermostat of yet another embodiment of the present invention.

FIG. 10 is a schematic cross-sectional view of an end cap assembly of a thermostat of yet another embodiment of the invention.

FIG. 11 is a schematic cross-sectional view of an end cap assembly of a thermostat of yet another embodiment of the invention.

FIG. 12 is a perspective view of a guide member of the endcap assembly of FIG. 11.

FIG. 13 is a perspective and cross-sectional schematic view of an end cap assembly of a thermostat of yet another embodiment of the present invention.

FIG. 14 is a perspective and cross-sectional schematic view of an end cap assembly of a thermostat of yet another embodiment of the present invention.

Fig. 15 is a schematic view of a mode of applying the thermostat of the present invention to a temperature control system at a low fluid temperature, fig. 16 is a schematic view of the mode of applying the thermostat at a high fluid temperature, and fig. 17 is a schematic view of the thermostat applied to the temperature control system at an abnormal pressure relief condition of the system.

FIG. 18 is a schematic view of another manner in which an embodiment of a thermostat of the present invention can be used in a temperature control system.

FIG. 19 is a schematic view of yet another manner in which an embodiment of a thermostat of the present invention can be used in a temperature control system.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings and the detailed description, fig. 1-7 are schematic diagrams of one embodiment, where fig. 1 is a perspective view of the thermostat, fig. 2 is a sectional view of the thermostat in one working state, fig. 3 is a sectional view of the thermostat in another working state, fig. 4 is a partially enlarged view of fig. 2, fig. 5 is a partially enlarged view of fig. 3, fig. 6 is a perspective view and a sectional view of an end cover of the thermostat, and fig. 7 is a sectional view of a valve body of the embodiment.

The initial deformation force described in the specification refers to the pressure applied to a spring which is in a compressed state when the product is not used and is subjected to deformation under the action of external force. The terms top, bottom, left side, right side, and the like as used herein are set forth in the accompanying drawings with the end cover assembly being the top and the center axis of the thermostat chamber being the center, or in the drawings.

The thermostat comprises a valve body 1 with a cavity 10 arranged therein and a thermal element 2 arranged in the cavity 10, and further comprises a first spring 31 and an end cover assembly. The valve body 1 is provided with at least three interfaces which can be communicated with the outside respectively, and the three interfaces comprise a first interface 11, a second interface 12 and a third interface 13. One end of the cavity 10 is open, and the end of the open end 100 is used for arranging an end cover assembly, and the other end of the valve body opposite to the end cover assembly is not provided with an opening, so that the processing procedures of the valve body can be reduced. The first spring 31 is firstly installed in the cavity 10, then the thermal element 2 is installed in the cavity 10 through the opening end 100 of the cavity 10, then the end cover assembly is installed in the opening end 100 of the cavity 10, the end cover assembly and the valve body are relatively fixedly arranged, in the embodiment, the second retainer ring 51 is clamped in the groove of the opening end 100 to realize the limiting in one direction even if the end cover assembly cannot move outwards and is separated, and the end cover assembly is enabled to pass through a step part of the opening end to limit the end cover assembly so that the end cover assembly cannot move further into the cavity, and therefore the relative fixing is realized. The thermal element 2 is supported in the chamber 10 opposite the first spring 31 by an end cap assembly. The chamber 10 includes a first chamber 101 and a second chamber 102, and the second chamber 102 is smaller than the first chamber 101 to form a step therebetween, and the step serves as a first valve seat 15 of the thermostat valve and forms a first valve port 150. The first chamber 101 is larger than the thermal element 2, and the expression "the first chamber is larger than the thermal element" means that the parts of the first chamber which cooperate with the thermal element are correspondingly larger than the corresponding parts of the thermal element, so that the thermal element can move within a certain range of the chamber, i.e. the range of the movement stroke thereof, and not necessarily all parts of the entire first chamber are larger than any position of the thermal element. One end of the first spring 31 abuts against the bottom of the second chamber, and the other end of the first spring 31 abuts against the first valve element 21 and is sleeved on the end 221 of the thermal element body 22. The first connector 11 and the second connector 12 are communicated with the first cavity 101, the axial position of the communication between the first connector 11 and the first cavity 101 is different from the axial position of the communication between the second connector 12 and the first cavity 101, the valve body 1 is further provided with a third cavity 103 which is arranged in a direction different from the axial direction of the cavity 10, the axial direction of the third cavity is approximately vertical to the axial direction of the cavity 10, and the third connector 13 is communicated with the second cavity 102 through the third cavity 103. In addition, the valve body in this embodiment further includes a fourth port 14 that can communicate with the outside, the fourth port 13 is disposed opposite to the third port 14, and both the fourth port 13 and the third port 14 communicate with the third chamber 103. The first port 11 and the second port 12 may be disposed at opposite positions of the valve body and disposed at different positions in the axial direction, and similarly, the fourth port 13 and the third port 14 may be disposed at opposite positions of the valve body, and the first port 11 and one of the fourth port 13 and the third port 14 may be disposed on the same side, and the second port 12 and the other port may be disposed on the same side. It should be noted here that the fourth connection 14 may not be provided, but merely facilitates the plumbing and installation of the thermostat.

The thermal actuator 2 comprises a thermal actuator body 22, a mandrel 24 and a heat-sensitive substance filled in the thermal actuator, wherein the heat-sensitive substance can generate volume change along with the change of temperature, and the volume change of the heat-sensitive substance pushes the mandrel 24 to move, so that the mandrel can be driven to move relative to the thermal actuator body; the body 22 further includes a first outer wall portion 23, which serves as a second spool in this embodiment; the thermal actuator 2 further comprises a first valve spool 21 fixed to the thermal actuator body 22, wherein the first valve spool 21 is disposed opposite to the first port 150 or toward the first port 150, and under certain conditions, the thermal actuator 2 can be used for blocking the first port 150 when moving in the direction of the first port indicated by the dashed arrow in the figure. The thermal element 2 is further provided with a first outer wall portion 23 on the other side opposite to the first valve core 21, and the first outer wall portion 23 is relatively close to the carrier rod 24; the end cap assembly is further provided with a second valve seat 16, the through hole of the second valve seat 16 forms a second valve port 160, the first outer wall portion 23 is provided at a side relatively close to the stem rod with a second valve spool 231 for blocking the second valve port 160, and the second valve spool 231 is relatively engaged with the second valve port for blocking the second valve port 160 when the thermal actuator 2 moves towards the direction of the second valve port as shown by the dotted arrow in the figure under certain conditions. The first valve core 21 may be integrally disposed with the body 22, or may be fixed to the body 22 in a manner of being fixedly disposed with the body, for example, in a manner of being tightly fitted and limited, for example, a limiting step is disposed on the body to limit the first valve core 21 to move toward the first outer wall portion.

The end cover assembly comprises an end cover 4, a spring seat 54, a first retainer ring 52 and a second spring 32, the end cover 4 is provided with an accommodating cavity 401, the second spring 32 is positioned in the accommodating cavity 401, the first retainer ring 52 is clamped in a groove of the accommodating cavity, the spring seat 54 is limited in the accommodating cavity 401 through the first retainer ring 52, one end of the second spring 32 is abutted against the accommodating cavity 401, the other end of the second spring 32 is abutted against the spring seat 54, the spring seat is in a cap-shaped structure and is sleeved on the end part of the top of the ejector rod 24, and the end part of the ejector rod 24 extending into the top of the spring seat part is positioned in the inner cavity of the spring seat, one end of the second spring 32 abutting against the spring seat 54 abuts against the extension of the spring seat, the second spring 32 is in a compressed state, the initial deformation force of the second spring 32 is greater than that of the first spring 31, and the initial deformation force of the second spring 32 is larger than the elastic force generated by the deformation of the first spring 31 when the thermal element contacts and closes the first valve port.

The cover assembly includes a body portion 41, a valve seat portion 44, a guide portion 46, a second connecting portion 45, and a first connecting portion 43, a groove 411 is provided on an outer side of the body portion for providing a sealing member so that the body portion of the cover assembly is fitted and sealed with the open end 100 of the chamber 10, at least one groove 411 for accommodating the sealing member may be provided on an outer peripheral side of the cover body portion 41, and an accommodating chamber 401 for accommodating a second spring or the like may be provided inside the cover body portion 41, so that, after the cover assembly is fitted and mounted with the valve body, the sealing member 53 may be provided between the cover assembly and the valve body to improve the sealing property between the cover assembly and the valve body. In the present embodiment, the main body portion 41, the valve seat portion 44, the guide portion 46, the second connection portion 45, and the first connection portion 43 are all provided on the end cap 4, and the second connection portion 45 and the first connection portion 43 have two columnar structures, or two or more columnar structures may be provided; the guide portion and the valve seat portion are of a substantially circular ring-shaped structure, the inner hole of the valve seat portion is smaller than the inner hole of the guide portion, and the outer diameter of the valve seat portion is larger than the outer diameter of the guide portion. The body part 41 is provided with a groove 411 for placing a sealing member, and a groove 421 for clamping the first retainer ring 52 is arranged at a position of the accommodating cavity 401 relatively close to the first connecting part 43; the main body part 41 is connected with the valve seat part 44 through a first connecting part 43, the guide part 46 is connected with the valve seat part 44 through a second connecting part 45, the second valve seat 16 is positioned on the valve seat part 44 in the embodiment, the inner diameter of the valve seat part 44 is smaller than that of the guide part 46, the inner diameter of the guide part 46 is slightly larger than that of the first outer wall part 23 of the thermal actuator 2, specifically, the inner diameter of the guide part 46 is 0.05-0.5mm larger than that of the first outer wall part 23 of the thermal actuator 2, so that the guide fit is realized, namely, the first outer wall part also serves as a guide fit part matched with the guide part in the embodiment, and the first outer wall part is larger than or equal to other parts of the thermal actuator main body; the guide engagement portion may be provided on another outer wall portion of the body portion, such as a second outer wall portion that is slightly smaller than the first outer wall portion and is located between the first outer wall portion and the first valve element. In addition, the inner diameter of the end part of the end cover assembly, which is matched with the end part of the ejector rod of the thermal actuator, is about 0.05-0.5mm larger than that of the end part of the ejector rod of the thermal actuator, and the whole ejector rod can be of a cylindrical structure, so that the end part of the ejector rod is the outer diameter of the ejector rod; when the thermal actuator moves along the arrow direction of the dotted frame in the figure, on one hand, the thermal actuator realizes initial positioning through the end part of the ejector rod and the inner cavity of the spring seat where the end part of the ejector rod is located, and on the other hand, the first outer wall part 23 of the thermal actuator is used as a guide matching part to be in sliding fit with the guide part 45 of the end cover assembly to realize better guide positioning. Alternatively, the retaining ring described above may be implemented by a snap ring. In addition, the clearance between the guide part of the end cover assembly and the thermal actuator at the position can be slightly smaller than that of the matching position of the end cover assembly and the ejector rod of the thermal actuator, so that the thermal actuator can act more stably, and particularly the thermal actuator is not easy to shake due to the pressure of incoming fluid when the inlet is arranged at the first interface.

The second chamber 102 is disposed through the third chamber 103 and forms a pair of shoulders 1021 for abutting against the spring, wherein the two chambers are in a substantially vertical state in this embodiment, at least a portion of the bottom of the second chamber 102 extends into the third chamber 103, but the bottom of the second chamber 102 does not extend too far into the third chamber 103, which does not affect the fluid flow of the third chamber, and the depth h of the bottom of the second chamber 102 extending into the third chamber 103 is less than or equal to 1/4 of the through diameter d of the third chamber: i.e. h is less than or equal to 1/4 d.

When in specific use, the temperature regulator can be externally connected with a heat exchanger and a gearbox oil tank which are externally used as a cooling device through pipelines and/or connecting pieces, for example, the first interface 11 is communicated with an oil path outlet of the gearbox, so that the second port 12 and the third port 13 are respectively connected with the inlet and the outlet of a heat exchanger for cooling the fluid of the gearbox, if the thermostat has only three ports, when the temperature of the fluid in the transmission, such as oil, is higher, the heat sensitive substance in the thermal actuator 2 is heated and expanded, the body 41 of the thermal actuator moves towards the first port 150 until the first valve core abuts against the first valve seat to seal the first port 150, the oil enters the thermostat from the first port 11 as shown by the solid arrow in fig. 3, then enters a heat exchanger of the system for heat dissipation through the second valve port 160 and the second interface 12, and the oil after heat dissipation and cooling flows back to the gearbox from the outlet of the heat exchanger; when the oil temperature in the gearbox is low, the thermosensitive substance in the thermal element contracts, the ejector rod retracts towards the body, and accordingly the body of the thermal element moves towards the second valve port 160 until the second valve core 231 abuts against the valve seat part 44 to seal the second valve port 160, so that the oil can enter the thermostat from the first port 11, then pass through the first valve port 150 and pass through the third port 13 and flow back to the gearbox without being cooled by the heat exchanger as shown by the solid arrow direction in fig. 2; if the temperature regulator has three interfaces, the oil flows out of the third interface 13 and flows back to the gearbox; thus, the oil temperature is controlled in a corresponding appropriate range.

When the temperature regulator has four interfaces, the first interface 11 can be communicated with an outlet of a fluid of the gearbox, such as an oil way, the second interface 12 and the third interface 13 are respectively communicated with an inlet and an outlet of a heat exchanger for cooling the fluid of the gearbox, the fourth interface 14 is communicated with an inlet of the fluid of the gearbox, and the communication mode can adopt pipelines and/or connecting pieces and the like or direct connection; when the temperature of the fluid in the transmission is higher, the heat sensitive substance in the thermal element 2 is heated and expanded, the body 41 of the thermal element moves towards the first valve port 150 until the first valve core 21 blocks the first valve port 150, the fluid enters the first cavity 101 of the thermostat from the first port 11 as shown by the solid arrow direction in fig. 3, then enters the heat exchanger of the system for heat dissipation through the second valve port 160 and the second port 12, and the fluid after heat dissipation and cooling flows back to the transmission through the third port 13 and the third cavity 103 from the outlet of the heat exchanger and the fourth port 14; when the oil temperature in the transmission is low, the heat sensitive substance in the thermal element contracts, the body of the thermal element moves towards the second valve port 160 until the second valve core 231 abuts against the valve seat portion 44 to block the second valve port 160, so that the fluid enters the thermostat from the first port 11 to the first cavity as shown by the solid arrow direction in fig. 2, then passes through the first valve port 150, passes through the second cavity 102, the third cavity 103 and passes through the fourth port 14, and flows back to the transmission without being cooled by the heat exchanger; thus, the oil temperature is controlled in a corresponding appropriate range.

Another embodiment is described below, as shown in fig. 8, the main difference between this embodiment and the above embodiment is that the end cap assembly has a different structure, the end cap assembly is not provided with a retaining ring, the end cap assembly includes a second spring 32, a cap body 4a, and a base body 4b, the cap body 4a and the base body 4b form an end cap by a screw thread fit, the cap body 4a and the base body 4b form an accommodating cavity 401 for placing the second spring 32 and the spring seat 54, the base body 4b is provided with a step portion for abutting against the spring seat 54, the second spring 32 is located in the accommodating cavity 401, the spring seat 54 is limited in the accommodating cavity 401 by the step portion 422 and cannot be removed from the cavity, one end of the second spring 32 abuts against the cap body 4a, the other end of the second spring 32 abuts against the spring seat 54, and the spring seat. The cover 4a is fitted and sealed with the open end 100 of the chamber 10, at least one seal accommodating recess 411 may be provided on the outer peripheral side of the cover 4a, the end cap assembly similarly includes a main body 41, a valve seat 44, a guide 46, a second connecting portion 45, and a first connecting portion 43, the spring seat 54 may be provided with a balance hole 541, and the accommodating chamber 401 communicates with the chamber 10 of the thermostat through the balance hole 541 and a hole 423 below the accommodating chamber. When the end cap assembly is installed in cooperation with the valve body, a sealing member 53 can be arranged between the end cap assembly and the valve body to improve the sealing performance between the end cap assembly and the valve body. In the present embodiment, the main body portion 41 is provided on the cover 4a, and the valve seat portion 44, the guide portion 46, the second connecting portion 45, and the first connecting portion 43 are provided on the seat body 4 b. Similarly, the second valve seat 16 is located in the valve seat portion 44, the inner diameter of the valve seat portion 44 is smaller than that of the guide portion 46, the inner diameter of the guide portion 46 is slightly larger than that of the first outer wall portion 23 of the thermal actuator 2, and specifically, the inner diameter of the guide portion 46 is about 0.05-0.5mm larger than the outer diameter of the first outer wall portion 23 of the thermal actuator 2, so that the two parts are in guiding fit. Similarly, the inner diameter of the end part matching part of the end cover assembly and the ejector rod of the thermal actuator is about 0.05-0.5mm larger than that of the end part of the ejector rod of the thermal actuator, and if the precision can be met, the inner diameter of the end part matching part of the end cover assembly and the ejector rod of the thermal actuator can be about 0.10-0.3mm larger than that of the end part of the ejector rod of the thermal actuator, so that the thermal actuator is more stable and reliable in action; the thermal element realizes primary positioning through the end part of the ejector rod positioned in the inner cavity of the spring seat, and realizes better guiding positioning through the first outer wall part 23 serving as a guiding matching part in sliding fit with the guiding part 45 of the end cover assembly. The cover body can be standardized by the scheme, different seat bodies can be adopted for different types of temperature regulators, a check ring can be omitted, and the assembly is more convenient. The seat body can be made of plastic materials through injection molding, so that the processing is more convenient, the weight can be reduced, and the material waste can be reduced.

Similarly, the spring seat is sleeved on the end part of the top of the ejector rod 24, which extends into the spring seat part, is located in the inner cavity of the spring seat, one end of the second spring 32, which abuts against the spring seat 54, abuts against the extension of the spring seat, the second spring 32 is in a compressed state, the initial deformation force of the second spring 32 is greater than the initial deformation force of the first spring 31, and the initial deformation force of the second spring 32 is greater than the elastic force required by the first spring 31 to deform when the thermal element contacts and closes the first valve port.

The end cap assembly of the thermostat can also be seen in fig. 9, with the end cap assembly of this embodiment being structurally different, the end cover assembly comprises a second spring 32, a cover body 4a ', a base body 4 b', a spring seat 54 and a first retaining ring 52, wherein the cover body 4a 'is provided with an accommodating cavity 401 for placing the second spring 32 and the spring seat 54, the second spring 32 and the spring seat 54 are clamped in the accommodating cavity 401 through the first retaining ring 52, one or both of the base body 4 b' and the cover body are provided with a limiting structure such as a step part, so that the base body assembled by the end cover assembly realizes the limiting of the movement towards the cover body direction, in addition, the local position of the seat body can be tightly matched with the first cavity of the valve body to realize the movement limit of the seat body towards the first valve port direction, or a step part is arranged at the part of the cavity body matched with the seat body and is used for realizing the movement limit of the seat body towards the first valve port direction in the cavity. The seat body part of the end cap assembly in this embodiment includes a body part 41, a valve seat part 44, a guide part 46, and a first connecting part 43, and the valve seat part is larger than the guide part, and the guide part is disposed close to the cover body with respect to the valve seat part, and the valve seat part is disposed far from the cover body with respect to the guide part, and the first connecting part 43 connects the guide part and the valve seat part; the cover 4 a' is also provided with a communication hole 413 for communicating the housing chamber 401 and the outside thereof. And when the temperature adjusting valve acts, the first outer wall part of the thermal actuator is not used as a guide matching part, but a part of the ejector rod of the thermal actuator is matched with the hole of the guide part 46 to realize sliding guide, so that the length direction of the temperature adjusting valve can be reduced when better motion guide is realized. Others may refer to the embodiments described above.

As shown in fig. 10, compared with the solution shown in fig. 8, the end cap assembly is configured such that the guide portion is disposed close to the cover body, and a second connection portion relatively far away from the cover body is eliminated, the end cap assembly includes a second spring 32, a cover body 4a ", a base body 4 b", and a spring seat 54, the cover body 4a "and the base body 4 b" form an end cap through threaded fit, the end cap assembly is not provided with a retaining ring, the cover body 4a "and the base body 4 b" form an accommodating cavity 401 for accommodating the second spring 32 and the spring seat 54, and a communication hole 413' is further provided to communicate the accommodating cavity 401 for accommodating the second spring 32 and the spring seat 54 with the outside; the seat body 4b ″ is provided with a guide portion 46 having a through hole, the guide portion is close to the spring seat and forms a step portion at the position for abutting against the spring seat 54, the second spring 32 is located in the accommodating cavity 401, the spring seat is limited in the accommodating cavity 401 through the step portion and cannot be separated from the cavity, one end of the second spring 32 abuts against the cover body 4a ″ and the other end of the second spring 32 abuts against the spring seat 54, and the spring seat is in a hat-shaped structure. The cover 4a "is sealed in cooperation with the open end 100 of the chamber 10 by at least one seal. During assembly, the second spring 32 and the spring seat are placed in a hole portion corresponding to one of the cover body and the base body, and then are in threaded connection with the other of the cover body and the base body, so that the initial deformation force of the second spring can be realized by adjusting the screwing depth of threads, and the sliding guide is realized by matching a guide hole relatively close to the spring seat with a mandril portion of the thermal element.

As shown in fig. 11 and 12, compared with the solutions shown in fig. 1 to 7, the spring seat structure of the solution is different, the spring seat 54 'is provided with a gap 543 and a limiting portion 542, one end of the second spring is disposed in the accommodating portion 544, and the inner side and the outer side of the accommodating portion 544 are provided with the limiting structures, so that in the process that the ejector rod of the thermostat drives the spring seat to move, the spring seat 54' does not incline relatively, so that the movement is more stable, the gap can balance the pressure of the spring seat, and the pressure of the chamber where the spring seat and the second spring are disposed is balanced with the pressure of the chamber where the space below the first retainer ring 52 is located.

As shown in fig. 13, compared with the above solution, the end cap assembly of this solution includes a cover 4a1, a seat body 4b1, a second spring 32, a first retainer ring 52, and a spring seat 54, where the second spring 32, the first retainer ring 52, and the spring seat 54 are disposed together with the cover 4a1, and the second spring 32 and the spring seat 54 are disposed in the containing cavity 401 of the cover in a limited manner by the first retainer ring 52 cooperating with the groove, and reference may be made to the above technical solution specifically; the seat body 4b1 includes a valve seat portion 44, a guide portion 46, a first connecting portion 43, and the valve seat portion is larger than the guide portion, the hole of the valve seat portion is larger than the hole of the guide portion, and the guide portion is disposed close to the cover body with respect to the valve seat portion, and the valve seat portion is disposed away from the cover body with respect to the guide portion, and the first connecting portion 43 connects the guide portion and the valve seat portion; the cover 4a1 is also provided with a communication hole 413 for communicating the housing chamber 401 and the outside thereof. When the temperature regulating valve acts, the first outer wall part of the thermal actuator is not used as a guide matching part, but a part of the ejector rod of the thermal actuator is matched with the hole of the guide part 46 to realize sliding guide, so that the length direction of the temperature regulating valve can be reduced when better motion guide is realized. The base body and the cover body can be in clearance fit, the cover body and the base body are provided with an axial limiting structure and a radial limiting structure to prevent the radial movement of the base body and the axial movement towards the cover body direction, the limiting of the base body towards the cover body direction can be realized by a first retaining ring 52 as shown in figure 13, and in addition, a step part can also be arranged on the cover body to realize the axial movement of the base body towards the cover body direction; the base body and the cover body can also be in transition fit or tight fit; the seat body can be tightly matched with the valve body to realize the limit towards the inner part of the cavity, namely the direction of the first valve port, so that the seat body is relatively limited in the cavity 10 of the valve body. The guide portion is also provided close to the lid body 4a1, and the guide portion and the second connecting portion in the direction relatively away from the lid body are eliminated. In addition, the cover 4a1 and the base 4b1 can be fixed by screw thread fit. When the temperature regulating valve is assembled, the first spring and the thermal actuator can be assembled firstly, then the base body and the cover body are assembled with the valve body, and in addition, the first spring and the thermal actuator can also be assembled with the valve body, and then the base body and the cover body are assembled in sequence; it is also possible to assemble the first spring solution relatively simply first, and otherwise refer to the embodiments described above.

The end cap assembly can also be shown in fig. 14, compared with the solutions shown in fig. 1-7, the main differences of the solutions include different end cap structures, different limiting ways of the spring seat 54, different matching guide structures, and the end cap further provided with a communication hole at the position of the accommodating cavity 401. Specifically, the end cover assembly comprises an end cover 4 ', a second spring 32, a spring seat 54 and a guide member 47, wherein the end cover 4' comprises a body part 41, a valve seat part 44 and a first connecting part 43, at least one sealing member accommodating groove 411 can be further arranged on the outer peripheral side of the end cover body part 41 so as to be matched and sealed with the open end 100 of the cavity 10 and an accommodating cavity 401 for placing the second spring and the like, the guide member and the end cover are fixedly arranged, such as welding fixing, thread fixing, tight fit fixing, interference riveting or a combination of more than two fixing modes, and the spring seat can be fixed through the guide member, and a retainer ring can not be used for fixing. The spring seat 54 abuts the retainer 47 so that when the end cap assembly is installed in engagement with the valve body, the seal 53 can be disposed between the end cap assembly and the valve body to improve the seal between the end cap assembly and the valve body. In the present embodiment, the body portion 41, the valve seat portion 44, and the first connecting portion 43 are provided to the head cover 4, and the guide portion is provided to the guide, so that the second connecting portion is not required. The body portion 41 and the valve seat portion 44 are connected through the first connecting portion 43, and the guide portion 46 and the ejector pin of the thermal actuator can be guided in a matching manner with the first outer wall portion of the thermal actuator, the difference between the outer diameter of the hole of the guide for guiding in a matching manner and the outer diameter of the part of the thermal actuator for guiding in a matching manner is 0.05-0.5mm, and the clearance between the hole of the guide for guiding in a matching manner and the part of the thermal actuator for guiding in a matching manner can be slightly smaller than the clearance between the ejector pin of the thermal actuator and the hole of the spring seat. Other configurations may be referred to the embodiments described above.

The guiding part of the thermostat in the above-provided embodiments is a circular ring structure, or a combination of several columnar structures, so that the thermal actuator does not fall out of the guiding part after combination, for example, the guiding part is a combination similar to more than two arc-shaped columns, the arc-shaped columns can be a part of the same circular ring structure, and the inside of the arc-shaped columns can be an arc-shaped structure matched with the thermal actuator structure, so that the requirement of guiding the thermal actuator can be met; the length of the guide part of the end cover assembly matched with the guide matching part of the thermal actuator is longer than the stroke of the thermal actuator in the cavity, for example, the length of the guide part is longer than 1mm, so that the thermal actuator is always matched with the guide part when the thermal actuator moves in the cavity. In addition, the guiding engagement portion in the above embodiment is the first outer wall portion or the ejector pin of the thermal actuator, and the guiding engagement portion may also be the transition portion 27 between the first outer wall portion and the exposed ejector pin.

In the embodiments provided above, the first port can be selected as the inlet of the thermostat, the fluid flow in two different operating conditions can be referred to in fig. 2 or 3, and the fluid flow in the thermostat valve can be further indicated by the direction of the dashed arrows shown in fig. 2 and 3, in particular fig. 15-17. If the temperature regulating valve only has three interfaces, a communication pipeline can be arranged outside the temperature regulator, and the purpose of controlling the temperature regulator can be achieved by flowing in from the third interface. In addition, the guide part is arranged on the end cover assembly in the embodiment described above, and is partially arranged on the end cover; part of the end cover assembly comprises a cover body and a base body, the guide part is arranged on the base body, the base body and the cover body can be assembled into an integral structure, in addition, the base body can also be a split structure, but a relatively fixed structure is formed after the base body is assembled in a cavity of the valve body, and the base body can be specifically fixed with the end cover or the cover body part of the end cover assembly, and can also be fixed with the valve body through the end cover or the cover body.

The temperature control system shown in fig. 15-17 is taken as an example to illustrate a specific application of the thermostat of the present invention in a temperature control system. The temperature control system comprises a thermostat, a heat exchanger 61 and a gearbox 62, wherein the thermostat of the embodiment is provided with four interfaces, two interfaces on one end side in the thermostat are respectively connected with an inlet and an outlet of a cooling fluid loop of the heat exchanger, and two interfaces on the same side in the thermostat are respectively connected with the inlet and the outlet of the cooling fluid loop of the gearbox, wherein a first interface 11 of the thermostat is communicated with the inlet of the cooling fluid of the gearbox, a fourth interface 14 of the thermostat is communicated with the outlet of the cooling fluid of the gearbox, a second interface 12 of the thermostat is communicated with the outlet of the cooling fluid of the heat exchanger, and a third interface 13 of the thermostat is communicated with the inlet of the cooling fluid of the heat exchanger; the first interface and the fourth interface are positioned on one side of the temperature regulator, which is relatively close to the gearbox, and the second interface and the third interface are positioned on the other side of the temperature regulator, which is relatively close to the cooling box. When the temperature of oil in the transmission is higher, the heat sensitive substance in the thermal element 2 is heated and expands, the body portion 41 of the thermal element moves towards the first valve port until the first valve core abuts against the first valve seat and seals the first valve port, and as shown by the solid arrow in fig. 16, the fluid comes out from the first fluid port 141 serving as the fluid outlet of the transmission, enters the thermostat from the fourth port 14 of the thermostat, and enters the first fluid port 131 of the heat exchanger from the third port 13 through the third chamber, the first fluid port 131 serves as the fluid inlet of the heat exchanger, and then passes through the second fluid port 121 of the heat exchanger after the heat exchange of the heat exchanger, the second fluid port 121 serves as the fluid outlet of the heat exchanger, flows into the thermostat through the second port 12, flows to the first port through the second valve port, and flows back to the transmission 62 from the first port 11 through the second fluid port 111 of the transmission, the second fluid connection 111 now serves as an inlet for the fluid of the gearbox. The fluid can exchange heat in the heat exchanger 61, which can be a cooler, and can be a double-channel heat exchanger, specifically, a gas-liquid heat exchange heat exchanger or a liquid-liquid heat exchange heat exchanger. When the oil temperature in the gearbox is low, the heat sensitive substance in the thermal element contracts, the body of the thermal element moves towards the direction of the second valve port until the second valve core abuts against the second valve seat to seal the second valve port, so that as shown in the direction of the solid arrow in fig. 15, the heat comes out of the first fluid port 141 of the gearbox, enters the thermostat from the fourth port 14, passes through the third chamber, passes through the second chamber 102 communicated with the third chamber, passes through the opened first valve port to the first chamber, flows out of the thermostat from the first port 11 communicated with the first chamber, and then flows back to the gearbox 62 through the second fluid port 111 serving as the inlet of the gearbox, and does not pass through the heat exchange of the heat exchanger, namely, is not cooled by the heat exchanger; thus, the oil temperature is controlled in a corresponding appropriate range. When the temperature control system is abnormal, the temperature control system has an abnormal pressure relief working condition, for example, when a pipeline between a fluid inlet of the heat exchanger and a fluid outlet of the heat exchanger is blocked or is not circulated smoothly, the fluid cannot circulate normally due to increased flow resistance, so that the pressure of the fluid from an outlet of the transmission case can be increased due to the abnormal circulation, namely, the pressure of a space where a second cavity and a third cavity of the thermostat are located can be increased, and because the fluid flows smoothly or is blocked, because the first valve port is closed, the pressure of the first cavity is relatively smaller due to the communication between the first cavity and the inlet of the transmission case, a certain pressure difference exists between two sides of the first valve port, namely between the second cavity and the first cavity, when the pressure difference reaches a certain degree, for example, the force generated by the pressure difference at that time is larger than the difference between the deformation force of the second spring and the deformation force of the first spring when the first valve port is closed, or when the force generated by the pressure difference can overcome the difference between the deformation force of the second spring and the deformation force of the first spring, the thermal element of the thermostat moves towards the second valve port under the action of the pressure difference, namely, the safety pressure relief condition occurs, so that the system can be prevented from being in a fault condition, namely, the temperature control system can realize the pressure relief under the condition of abnormal pressure. Therefore, the pressure relief can be realized without independently arranging a pressure relief device, and the structure of the temperature regulating valve is relatively simple.

In addition, the temperature control system can also be shown in fig. 18, which is a schematic diagram of another specific application manner of the thermostat in the temperature control system. The temperature control system comprises a temperature regulator, a heat exchanger 61 and a gearbox 62, wherein the temperature regulator is provided with four interfaces, two interfaces, namely a second interface and a third interface, on one end side in the temperature regulator are respectively connected with an inlet and an outlet of a cooling fluid loop of the heat exchanger, the other two interfaces, namely a first interface and a fourth interface, on the same side in the temperature regulator are respectively connected with an inlet and an outlet of a cooling fluid loop of the gearbox, a first interface 11 of the temperature regulator is communicated with a second fluid interface of the gearbox, the second fluid interface is used as an outlet of cooling fluid of the gearbox, a fourth interface 14 of the temperature regulator is communicated with a first fluid interface of the gearbox, the first fluid interface is used as an inlet of the cooling fluid of the gearbox, a second interface 12 of the temperature regulator is communicated with a second fluid interface of the heat exchanger, the second fluid interface is used as an inlet of the cooling fluid of the heat exchanger, and a third interface 13, the first fluid interface of the heat exchanger is used as an outlet of cooling fluid of the heat exchanger, the third interface 13 of the thermostat is simultaneously communicated with the first fluid interface of the gearbox, and the first fluid interface of the heat exchanger is also simultaneously communicated with the first fluid interface of the gearbox; therefore, when fluid enters the thermostat from the second fluid interface of the gearbox, due to the arrangement of the guide structure of the thermostat, even if fluid pressure impacts the thermal element, the thermal element cannot shake greatly, and the operation is more stable. Other references may be made to the above-described embodiments and will not be repeated here.

The temperature control system may further include, as shown in fig. 19, in this embodiment, the thermostat has three interfaces, a first interface of the thermostat is communicated with the second fluid interface 111 of the transmission, a second interface of the thermostat is communicated with the second fluid interface 121 of the heat exchanger, the first fluid interface 131 of the heat exchanger is used as an outlet of fluid of the heat exchanger, the second fluid interface 121 of the heat exchanger is used as an inlet of fluid of the heat exchanger, the second fluid interface of the transmission is used as a transmission fluid outlet, and the first fluid interface 141 of the transmission is used as a transmission fluid inlet; the third interface of the thermostat is communicated with the first fluid interface of the gearbox, the first fluid interface of the heat exchanger is communicated with the first fluid interface of the gearbox, and the communication mode comprises the steps that the third interface of the thermostat and the first fluid interface of the heat exchanger are respectively communicated with the first fluid interface of the gearbox, and the third interface of the thermostat and the first fluid interface of the heat exchanger are communicated and then communicated with the first fluid interface of the gearbox.

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

Claims (15)

1. A temperature control system comprises a thermostat, a heat exchanger and a gearbox, wherein the thermostat comprises four interfaces: the thermostat comprises a valve body with a cavity arranged therein, an end cover assembly, a thermal element positioned in the cavity and a first spring; the heat exchanger comprises a first fluid interface and a second fluid interface, and the gearbox comprises a first fluid interface and a second fluid interface; the first interface of the thermostat is communicated with the second fluid interface of the gearbox, the fourth interface of the thermostat is communicated with the first fluid interface of the gearbox, the second interface of the thermostat is communicated with the second fluid interface of the heat exchanger, and the third interface of the thermostat is communicated with the first fluid interface of the heat exchanger; the cavity of the thermostat comprises a first cavity and a second cavity, the second cavity is smaller than the first cavity, and the second cavity is far away from the end cover assembly relative to the first cavity; the valve body is also provided with a third cavity, and the third port and the fourth port are communicated with the second cavity through the third cavity; the temperature regulating valve comprises a first valve port and a second valve port, and the first interface is communicated with a space of the first cavity between the first valve port and the second valve port; the first valve port is positioned at a position of the second cavity relatively close to the first cavity or the first valve port is positioned at a position of the first cavity relatively close to the second cavity; in the axial direction of the valve body, the first valve port is located between the first interface and the third interface of the valve body, and the second valve port is located between the first interface and the second interface of the valve body; the first fluid interface of the heat exchanger is used as an inlet of the fluid of the heat exchanger, the second fluid interface of the heat exchanger is used as an outlet of the fluid of the heat exchanger, the first fluid interface of the gearbox is used as a fluid outlet of the gearbox, and the second fluid interface of the gearbox is used as a fluid inlet of the gearbox;

the end cover assembly of the thermostat comprises an end cover, a spring seat and a second spring, wherein the end cover is provided with an accommodating cavity, the second spring and the spring seat are positioned in the accommodating cavity, the spring seat is limited in the accommodating cavity through a check ring or other limiting devices fixedly arranged with the end cover, one end of the second spring abuts against the wall part corresponding to the accommodating cavity, and the other end of the second spring abuts against the spring seat; the spring seat is sleeved at the end part of a push rod of the thermal element, and the push rod partially extends into an inner cavity of the spring seat.

2. The temperature control system of claim 1, wherein the operation of the temperature control system further comprises an abnormal pressure relief condition in which the pressure in the second chamber of the thermostat is greater than the pressure in the first chamber, and the pressure differential between the two creates a force that causes the thermal element to move away from the first valve port and the first valve port to open.

3. The temperature control system of claim 1 or 2, wherein the thermal element of the thermostat comprises a stem and a body, the first spring being at least partially or entirely located in the second chamber; the thermal element is mostly or entirely located in the first cavity, which is larger than the thermal element; one end of the thermal element is abutted or indirectly abutted or supported with one end, close to the thermal element, of the first spring, and the other end of the thermal element is limited in the end cover assembly; and the temperature adjusting valve is also provided with a guide part in the cavity of the temperature adjuster, the thermal element comprises a guide matching part matched with the guide part, and the guide part is in sliding fit with the guide matching part.

4. The temperature control system of claim 3, wherein the thermostat includes fixedly disposed first and second valve seats, the first valve seat having the first valve port, the second valve seat having the second valve port; the first valve seat is positioned at a position of the second cavity relatively close to the first cavity or the first valve seat is positioned at a position of the first cavity relatively close to the second cavity; the thermal valve element further comprises a first valve core and a second valve core, wherein the first valve core is arranged opposite to the first valve seat, the second valve core is arranged opposite to the second valve seat, the first valve core and the body part of the thermal valve element are of an integral structure or fixedly arranged, the end cover assembly comprises a valve seat part, a guide part and a first connecting part, the valve seat part is connected through the first connecting part, and the second valve seat is arranged on the valve seat part.

5. The temperature control system of claim 4, wherein an inner diameter of the thermostat guide is larger than a thermal actuator guide engagement, the inner diameter of the guide is 0.05-0.5mm larger than an outer diameter of the thermal actuator guide engagement, and a length of the end cap assembly guide or the thermal actuator guide engagement is larger than a stroke of the thermal actuator operable within the cavity.

6. The temperature control system of claim 1, 2, 4 or 5, wherein the thermostat cover assembly comprises a valve seat portion, a guide portion, a second connecting portion, and a first connecting portion, the guide portion and the valve seat portion are of a substantially annular ring-shaped structure, the inner bore of the valve seat portion is smaller than the inner bore of the guide portion, and the outer diameter of the valve seat portion is larger than the outer diameter of the guide portion; the first connecting portion connects the guide portion and the valve seat portion, the valve seat portion is located between the first connecting portion and the second connecting portion, and the guide portion is close to the first valve port with respect to the valve seat portion; the body of the thermal actuator comprises an outer wall portion, the outer wall portion is the guide matching portion, and the inner diameter of the guide portion is larger than the outer diameter of the outer wall portion of the thermal actuator.

7. The temperature control system of claim 3, wherein the thermostat's end cap assembly comprises a valve seat portion, a guide portion, a second connecting portion, and a first connecting portion, the guide portion and the valve seat portion being of generally annular configuration, the valve seat portion having an inner bore smaller than an inner bore of the guide portion, the valve seat portion having an outer diameter greater than an outer diameter of the guide portion; the first connecting portion connects the guide portion and the valve seat portion, the valve seat portion is located between the first connecting portion and the second connecting portion, and the guide portion is close to the first valve port with respect to the valve seat portion; the body of the thermal actuator comprises an outer wall portion, the outer wall portion is the guide matching portion, and the inner diameter of the guide portion is larger than the outer diameter of the outer wall portion of the thermal actuator.

8. The temperature control system of claim 1 or 2 or 4 or 5, wherein the end cap comprises a valve seat portion, a guide portion, a first connection portion connecting the guide portion and the valve seat portion, the first connection portion being located between the guide portion and the valve seat portion.

9. The temperature control system of claim 3, wherein the end cap comprises a valve seat portion, a guide portion, a first connection portion connecting the guide portion and the valve seat portion, the first connection portion being located between the guide portion and the valve seat portion.

10. The temperature control system according to claim 1, 2, 4 or 5, wherein the end cap assembly of the thermostat comprises a cap body and a base body, the cap body and the base body are relatively fixed through thread fit, the cap body and the base body cooperate to form an accommodating cavity for accommodating the second spring and the spring seat, the base body is provided with a step portion for abutting against the spring seat, and one end of the second spring abuts against the cap body; the pedestal includes valve seat portion, guide part, first connecting portion connect the guide part with valve seat portion, first connecting portion are located the guide part with between the valve seat portion.

11. The temperature control system according to claim 1, 2, 4 or 5, wherein the end cap assembly of the thermostat comprises a cap body and a base body, the cap body and the base body are relatively fixed through thread fit, the cap body and the base body cooperate to form an accommodating cavity for accommodating the second spring and the spring seat, the base body is provided with a step portion for abutting against the spring seat, and one end of the second spring abuts against the cap body; the pedestal includes valve seat portion, guide part, first connecting portion connect the guide part with valve seat portion, first connecting portion are located the guide part with between the valve seat portion.

12. The temperature control system according to claim 1, 2 or 4, wherein the end cover assembly of the thermostat comprises a cover body and a base body, the cover body comprises a receiving cavity for accommodating the second spring and the spring seat, the receiving cavity is provided with a groove for accommodating a retaining ring, the retaining ring is partially located in the groove to realize axial limiting, the spring seat abuts against the retaining ring, and one end of the second spring abuts against the cover body; the seat body comprises a valve seat part, a guide part and a first connecting part, wherein the first connecting part is connected with the guide part and the valve seat part, and is positioned between the guide part and the valve seat part; the seat body and the cover body are fixedly arranged, or the seat body and the cover body are tightly matched, or one or both of the seat body and the cover body are provided with a limiting structure for preventing the seat body from moving towards the direction of the cover body, and the valve body is provided with a limiting step part at the part of the cavity matched with the seat body for preventing the seat body from moving towards the direction of a first valve port in the cavity.

13. The temperature control system according to claim 3, wherein the cover assembly of the thermostat comprises a cover body and a base body, the cover body comprises a receiving cavity for accommodating the second spring and the spring seat, the receiving cavity is provided with a groove for accommodating a retainer ring, the retainer ring is partially located in the groove to realize axial limiting, the spring seat abuts against the retainer ring, and one end of the second spring abuts against the cover body; the seat body comprises a valve seat part, a guide part and a first connecting part, wherein the first connecting part is connected with the guide part and the valve seat part, and is positioned between the guide part and the valve seat part; the seat body and the cover body are fixedly arranged, or the seat body and the cover body are tightly matched, or one or both of the seat body and the cover body are provided with a limiting structure for preventing the seat body from moving towards the direction of the cover body, and the valve body is provided with a limiting step part at the part of the cavity matched with the seat body for preventing the seat body from moving towards the direction of a first valve port in the cavity.

14. The temperature control system according to claim 1 or 2, wherein the end cap assembly of the thermostat comprises a cap body and a base body, the cap body comprises a receiving cavity for accommodating the second spring and the spring seat, the receiving cavity is provided with a groove for accommodating a retaining ring, the retaining ring is partially located in the groove to realize axial limiting, the spring seat abuts against the retaining ring, and one end of the second spring abuts against the cap body; the seat body comprises a valve seat part, a guide part and a first connecting part, wherein the first connecting part is connected with the guide part and the valve seat part, and is positioned between the guide part and the valve seat part; the seat body and the cover body are fixedly arranged, or the seat body and the cover body are tightly matched, or one or both of the seat body and the cover body are provided with a limiting structure for preventing the seat body from moving towards the direction of the cover body, and the valve body is provided with a limiting step part at the part of the cavity matched with the seat body for preventing the seat body from moving towards the direction of a first valve port in the cavity; the guide portion is arranged close to the cover body relative to the valve seat portion, and a push rod of the thermal actuator serves as a guide matching portion matched with the guide portion.

15. The temperature control system according to claim 3, wherein the cover assembly of the thermostat comprises a cover body and a base body, the cover body comprises a receiving cavity for accommodating the second spring and the spring seat, the receiving cavity is provided with a groove for accommodating a retainer ring, the retainer ring is partially located in the groove to realize axial limiting, the spring seat abuts against the retainer ring, and one end of the second spring abuts against the cover body; the seat body comprises a valve seat part, a guide part and a first connecting part, wherein the first connecting part is connected with the guide part and the valve seat part, and is positioned between the guide part and the valve seat part; the seat body and the cover body are fixedly arranged, or the seat body and the cover body are tightly matched, or one or both of the seat body and the cover body are provided with a limiting structure for preventing the seat body from moving towards the direction of the cover body, and the valve body is provided with a limiting step part at the part of the cavity matched with the seat body for preventing the seat body from moving towards the direction of a first valve port in the cavity; the guide portion is arranged close to the cover body relative to the valve seat portion, and a push rod of the thermal actuator serves as a guide matching portion matched with the guide portion.

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