Thermostat device for engine, engine and vehicle

Abstract

The utility model discloses a thermostat device for an engine, the engine and a vehicle, and the thermostat device comprises a shell in which a first circulating flow channel and a second circulating flow channel are formed; the temperature adjusting part is arranged in the shell and abuts against the inner wall of the shell, and the temperature adjusting part selectively enables the first circulating flow channel and the second circulating flow channel to be communicated; and the exhaust valve is arranged on the inner wall of the shell or the thermostat part, the two ends, in the axial direction, of the exhaust valve communicate with the first circulating flow channel and the second circulating flow channel correspondingly, and the exhaust valve is suitable for guiding part of gas and cooling liquid in the first circulating flow channel into the second circulating flow channel. According to the thermostat device for the engine, the service life of the thermostat part can be prolonged, and normal operation of the thermostat part is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to a thermostat device for an engine, an engine and a vehicle. BACKGROUND

[0002] In the related art, when the engine is first filled with antifreeze or is replaced, the problem of gas mixing into the cooling system often occurs. Since the engine is in a low temperature state at this time, the thermostat will automatically close, and the engine will enter a small circulation mode. At this time, the coolant and the mixed gas circulate together in the engine. During this circulation process, the surfaces of components such as the thermostat and the water jacket are easily damaged due to cavitation. The continuous impact of the coolant in the circulation further exacerbates the wear of these parts, resulting in damage to the thermostat and the water jacket. More seriously, if the gas cannot be effectively discharged, the gas will continue to cause cavitation problems to the thermostat, which not only affects the normal operation of the thermostat, but also shortens its service life. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a thermostat device for an engine, which can improve the service life of the thermostat and ensure the normal operation of the thermostat.

[0004] The present application also provides an engine having the above-mentioned thermostat device.

[0005] The present application also provides a vehicle having the above-mentioned engine.

[0006] According to the thermostat device for an engine of the embodiments of the present application, the exhaust valve is arranged on the inner wall of the housing or the thermostat, and the two ends of the exhaust valve in the axial direction are respectively communicated with the first circulation flow channel and the second circulation flow channel. The exhaust valve is adapted to guide part of the gas and the coolant in the first circulation flow channel into the second circulation flow channel. Thus, the gas in the cooling system of the engine can be effectively discharged, and the cavitation problems of the thermostat and the water jacket of the engine can be avoided, thereby improving the service life of the thermostat and ensuring the normal operation of the thermostat.

[0007] According to the thermostat device for an engine of the embodiments of the present application, the exhaust valve is arranged on the inner wall of the housing or the thermostat, and the two ends of the exhaust valve in the axial direction are respectively communicated with the first circulation flow channel and the second circulation flow channel. The exhaust valve is adapted to guide part of the gas and the coolant in the first circulation flow channel into the second circulation flow channel. Thus, the gas in the cooling system of the engine can be effectively discharged, and the cavitation problems of the thermostat and the water jacket of the engine can be avoided, thereby improving the service life of the thermostat and ensuring the normal operation of the thermostat.

[0008] In some embodiments of the present application, an inner wall of the shell is formed with a protrusion extending towards the thermostat, a free end of the protrusion is in abutment with the thermostat, and a communication passage is formed in the protrusion and extends through in the axial direction; wherein the communication passage is in communication with the first circulation flow channel and the second circulation flow channel respectively, and the exhaust valve is arranged in the communication passage.

[0009] In the above technical solution, the inner wall of the shell is provided with the protrusion, the communication passage can be formed in the protrusion, the communication passage can be in communication with the first circulation flow channel and the second circulation flow channel respectively, and the exhaust valve can be arranged in the communication passage. When the exhaust valve is opened, the gas in the first circulation flow channel and the coolant can flow to the exhaust valve through the communication passage, and then be guided to the second circulation flow channel through the exhaust valve, thereby realizing the exhaust of the gas.

[0010] In some embodiments of the present application, the protrusion is located at the top of the thermostat.

[0011] In the above technical solution, the protrusion is arranged at the top of the thermostat, and the exhaust valve is also located at the top of the thermostat. Since the density of the gas is less than that of the coolant, the gas will float at the top of the first circulation flow channel, so that the gas at the top of the first circulation flow channel is more easily exhausted through the exhaust valve, thereby facilitating the exhaust of the exhaust valve, and further improving the exhaust efficiency.

[0012] In some embodiments of the present application, the thermostat is provided with a spring seat, and a mounting hole extending through in the axial direction is formed in the spring seat; wherein the exhaust valve is arranged in the mounting hole.

[0013] In the above technical solution, the spring seat is arranged on the thermostat, which can support the spring. The mounting hole is formed in the spring seat, and the exhaust valve is arranged in the mounting hole, without the need for additional hole opening, thereby facilitating the exhaust of the exhaust valve.

[0014] In some embodiments of the present application, the exhaust valve comprises: a valve body, a moving cavity is formed in the valve body, two ends of the valve body in the axial direction are respectively formed with an inlet end and an outlet end, the inlet end is in communication with the first circulation flow channel, and the outlet end is in communication with the second circulation flow channel; a moving member is arranged in the moving cavity, and the moving member is selectively movable in the moving cavity to adapt to the conduction or disconnection of the inlet end and the outlet end.

[0015] In the technical solution, the moving part is arranged in the moving cavity and is selectively movable in the moving cavity, so as to realize the connection or disconnection of the inlet end and the outlet end. The moving part can realize the connection or disconnection of the inlet end and the outlet end, and thus realize the opening or closing of the exhaust valve.

[0016] In some embodiments of the application, the inner wall of the inlet end is formed with at least one radial limiting plate; wherein the moving part is selectively in abutment with the limiting plate to close the inlet end.

[0017] In the technical solution, the moving part is selectively in abutment with the limiting plate, so as to realize the closing of the inlet end. When the temperature regulating part is opened, the cooling liquid flows from the first circulation channel to the second circulation channel. Since the pressure in the second circulation channel is greater than that in the first circulation channel, the moving part is in abutment with the limiting plate under the influence of the pressure, so as to close the inlet end and keep the exhaust valve in the closed state. This arrangement can prevent the cooling liquid in the second circulation channel from flowing back to the first circulation channel, and thus improves the reliability of the temperature regulating device.

[0018] In some embodiments of the application, the inner diameter of at least part of the valve body gradually decreases in the direction from the inlet end to the outlet end.

[0019] In the technical solution, the inner diameter of at least part of the valve body gradually decreases in the direction from the inlet end to the outlet end. Therefore, the moving part is in abutment with part of the inner wall of the valve body during movement, so as to limit the movement distance of the moving part and prevent the moving part from leaving the moving cavity.

[0020] In some embodiments of the application, the exhaust valve further comprises an elastic part arranged in the moving cavity and adjacent to the outlet end, one end of the elastic part being fixedly connected with the inner wall of the valve body, and the other end of the elastic part being in abutment with the moving part.

[0021] In the technical solution, the elastic part can restore the moving part to abut against the limiting plate of the inlet end under the influence of the elastic force, and can also prevent the moving part from closing the outlet end.

[0022] The engine of the embodiments of the application is briefly described below.

[0023] According to the engine of the embodiment of the present application, the engine is provided with the thermostat device of the above embodiment, and therefore, the thermostat device of the engine is provided with the exhaust valve arranged on the inner wall of the shell or the thermostat element, and the two ends of the exhaust valve in the axial direction are communicated with the first circulating flow channel and the second circulating flow channel respectively, and the exhaust valve can guide part of the gas and the coolant in the first circulating flow channel into the second circulating flow channel during the operation, so that the gas in the engine cooling system is effectively discharged, the cavitation problem of the thermostat element and the engine water jacket is avoided, and the service life of the engine is prolonged, and the normal operation of the engine is ensured.

[0024] The vehicle of the embodiment of the present application is briefly described below.

[0025] According to the vehicle of the embodiment of the present application, the vehicle is provided with the engine of the above embodiment, and therefore, the engine of the vehicle is provided with the thermostat device, the thermostat device is provided with the exhaust valve arranged on the inner wall of the shell or the thermostat element, and the two ends of the exhaust valve in the axial direction are communicated with the first circulating flow channel and the second circulating flow channel respectively, and the exhaust valve can guide part of the gas and the coolant in the first circulating flow channel into the second circulating flow channel during the operation, so that the gas in the engine cooling system is effectively discharged, and the reliability of the vehicle is improved.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0028] Figure 1 is a structure schematic view of the thermostat device according to the embodiment of the present application;

[0029] Figure 2 is Figure 1 is a side view schematic view of the thermostat device in the middle;

[0030] Figure 3 is Figure 2 is a sectional view schematic view of the A-A section in the middle;

[0031] Figure 4 is Figure 3 is a structure schematic view of the control valve in the middle.

[0032] REFERENCE NUMERALS:

[0033] 10, thermostat device;

[0034] 11, shell; 111, first circulating flow channel; 112, second circulating flow channel;

[0035] 113, protrusion; 114, communication passage;

[0036] 12, thermostat; 121, spring seat; 13, control valve;

[0037] 131, valve body; 1311, moving cavity; 1312, inlet end; 1313, outlet end; 1314, limiting plate;

[0038] 132, moving piece; 133, elastic piece. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0040] Reference is made below to Figures 1-4 A thermostat device 10 for an engine according to an embodiment of the present application is described below, which comprises a housing 11, a thermostat 12 and an exhaust valve 13.

[0041] A first circulation passage 111 and a second circulation passage 112 are formed in the housing 11. The thermostat 12 is arranged in the housing 11 and abuts against the inner wall of the housing 11, and the thermostat 12 selectively conducts the first circulation passage 111 and the second circulation passage 112. The exhaust valve 13 is arranged on the inner wall of the housing 11 or the thermostat 12, and the two ends of the exhaust valve 13 along the axial direction are respectively communicated with the first circulation passage 111 and the second circulation passage 112, and the exhaust valve 13 is adapted to guide part of the gas and the coolant in the first circulation passage 111 into the second circulation passage 112.

[0042] At present, when the engine is first filled with antifreeze or replaced, it often faces the problem of gas mixing into the cooling system. At this time, the engine is in a low temperature state, the thermostat is automatically closed, and the engine enters a small circulation mode. At this time, the coolant and the mixed gas are circulated in the engine. During this circulation process, the surfaces of the thermostat and the water jacket and other components are easily damaged due to cavitation. These gases will continue to cause cavitation problems to the engine waterway and the thermostat, not only affecting the normal operation of the engine and the thermostat, but also shortening their service life.

[0043] To this end, the present application proposes a thermostat device 10 for an engine, which can improve the service life of the thermostat 12 and ensure the normal operation of the thermostat 12.

[0044] As Figures 1-3As shown, specifically, the thermostat device 10 can include a housing 11 and a thermostat 12, the first circulation flow channel 111 can be formed in the housing 11 as a small circulation flow channel of the cooling liquid of the engine, the second circulation flow channel 112 can be in communication with the water outlet of the engine, and the second circulation flow channel 112 can be as a large circulation flow channel of the cooling liquid of the engine, the thermostat 12 can be arranged in the housing 11, and the thermostat 12 can be in abutment with the inner wall of the housing 11, and it should be noted that the thermostat 12 can be in abutment with the inner wall of the housing 11 to avoid the first circulation flow channel 111 and the second circulation flow channel 112 being directly communicated. The thermostat 12 can selectively conduct the first circulation flow channel 111 and the second circulation flow channel 112, and it can be understood that when the temperature of the cooling liquid in the engine is too high, the thermostat 12 can conduct the first circulation flow channel 111 and the second circulation flow channel 112, so that the cooling liquid in the engine is switched from small circulation to large circulation, realizing rapid cooling of the cooling liquid, thereby meeting the demand of the engine for heat dissipation and cooling, wherein the thermostat 12 can be configured as an electronic thermostat.

[0045] Further, as shown in Figure 4 The thermostat device 10 further includes an exhaust valve 13, which can be arranged on the inner wall of the housing 11 or the thermostat 12, and the two ends of the exhaust valve 13 in the axial direction can be in communication with the first circulation flow channel 111 and the second circulation flow channel 112, respectively, and it should be noted that the axial direction can be the axial direction of the thermostat 12, and the exhaust valve 13 can be arranged on the inner wall of the housing 11, or the exhaust valve 13 can be arranged on the thermostat 12 to realize integration with the thermostat 12. The exhaust valve 13 can be used to guide part of the gas and cooling liquid in the first circulation flow channel 111 into the second circulation flow channel 112, and optionally, the exhaust valve 13 can be opened or closed by means of electronic control, or the exhaust valve 13 can be opened under the influence of pressure difference, for example, when the pressure in the first circulation flow channel 111 is greater than the pressure in the second circulation flow channel 112, the exhaust valve 13 can be opened to guide the gas and cooling liquid into the second circulation flow channel 112, and the gas will enter the overflow tank of the engine and then be discharged through the overflow tank, thereby effectively avoiding the cavitation problem of the thermostat 12 and the engine water jacket during the cold start and small circulation of the engine, effectively improving the service life of the thermostat 12 and the engine, and ensuring that the thermostat 12 and the engine can work normally. And when the internal pressure of the cooling system of the engine is too large, the exhaust valve 13 can also be opened in time to prevent the engine gasket from being damaged due to excessive internal pressure of the cooling system.

[0046] Briefly, the temperature regulating device 10 of the embodiments of the present application can effectively discharge the gas in the engine cooling system, avoid the cavitation problems of the temperature regulating element 12 and the engine water jacket, and improve the service life of the temperature regulating element 12, so as to ensure the normal operation of the temperature regulating element 12, by arranging the exhaust valve 13 on the inner wall of the housing 11 or the temperature regulating element 12, and making the two ends of the exhaust valve 13 in the axial direction communicate with the first circulating flow channel 111 and the second circulating flow channel 112 respectively, so that the exhaust valve 13 can guide part of the gas and the coolant in the first circulating flow channel 111 into the second circulating flow channel 112 during operation.

[0047] As shown in Figure 3 In some embodiments of the present application, the inner wall of the housing 11 is formed with a protruding portion 113, the protruding portion 113 can extend towards the temperature regulating element 12, and the free end of the protruding portion 113 can abut against the temperature regulating element 12, wherein the protruding portion 113 can be formed with a communication channel 114, the communication channel 114 can penetrate the protruding portion 113 in the axial direction, and the communication channel 114 can communicate with the first circulating flow channel 111 and the second circulating flow channel 112 respectively, the exhaust valve 13 can be arranged in the communication channel 114, and the outer periphery of the exhaust valve 13 can be in sealing connection with the communication channel 114, when the exhaust valve 13 is opened, the gas and the coolant in the first circulating flow channel 111 can flow into the exhaust valve 13 through the communication channel 114, and then be guided into the second circulating flow channel 112 through the exhaust valve 13, so as to realize the discharge of the gas.

[0048] As shown in Figure 3 In some embodiments of the present application, the protruding portion 113 can be located at the top of the temperature regulating element 12, because the density of the gas is smaller than that of the coolant, the gas will float on the top of the first circulating flow channel 111, therefore, when the protruding portion 113 is arranged at the top of the temperature regulating element, the exhaust valve 13 is also located at the top of the temperature regulating element, the gas on the top of the first circulating flow channel 111 is more easily discharged through the exhaust valve 13, thereby facilitating the exhaust of the exhaust valve 13, and further improving the exhaust efficiency.

[0049] In some embodiments of the present application, the temperature regulating element 12 can be provided with a spring seat 121, the spring seat 121 can support the spring, the outer peripheral wall of the spring seat 121 can abut against the inner wall of the housing 11, further, the spring seat 121 can be formed with a mounting hole, the mounting hole can be arranged in the axial direction, and the exhaust valve 13 can be arranged in the mounting hole, optionally, the mounting hole can be located at the upper portion of the spring seat 121, thereby facilitating the exhaust of the exhaust valve 13.

[0050] As shown in Figure 4As shown in the figure, in some embodiments of the present application, the exhaust valve 13 can include a valve body 131 and a moving piece 132, the valve body 131 can be formed with a moving cavity 1311 inside, the valve body 131 is formed with an inlet end 1312 and an outlet end 1313 at two axial ends respectively, the inlet end 1312 can be in communication with the first circulation flow channel 111, the outlet end 1313 can be in communication with the second circulation flow channel 112, the moving piece 132 can be arranged in the moving cavity 1311 and selectively move in the moving cavity 1311, so as to realize the conduction or disconnection of the inlet end 1312 and the outlet end 1313, it can be understood that when the moving piece 132 moves to the middle of the inlet end 1312 and the outlet end 1313, the inlet end 1312 and the outlet end 1313 can be conducted, at this time, the exhaust valve 13 can be in an open state, when the moving piece 132 moves to the inlet end 1312 or the outlet end 1313 to close it, the inlet end 1312 and the outlet end 1313 can be disconnected, at this time, the exhaust valve 13 can be in a closed state, by arranging the moving piece 132, the conduction or disconnection of the inlet end 1312 and the outlet end 1313 can be realized, and then the opening or closing of the exhaust valve 13 can be realized, in a specific embodiment, the moving piece 132 can be configured as a steel ball.

[0051] As shown in the figure, Figure 2 and Figure 4 As shown in the figure, in some embodiments of the present application, the inner wall of the inlet end 1312 can be formed with a limiting plate 1314, the number of the limiting plate 1314 can be one or more, each limiting plate 1314 can extend along the radial direction, wherein the radial direction can be the radial direction of the valve body 131, the moving piece 132 can selectively abut against the limiting plate 1314, so as to realize the closing effect of the inlet end 1312, when the number of the limiting plate 1314 is more than one, the plurality of limiting plates 1314 can be arranged in a circumferential direction, the circumferential direction can be the circumferential direction of the inlet end 1312. It should be noted that when the engine coolant circulates, at this time, the thermostat is opened, the coolant flows from the first circulation flow channel 111 to the second circulation flow channel 112, because the pressure in the second circulation flow channel 112 is greater than that in the first circulation flow channel 111, the moving piece 132 abuts against the limiting plate 1314 under the influence of the pressure, so as to close the inlet end 1312, the exhaust valve 13 is in a closed state, such arrangement can avoid the backflow of the coolant in the second circulation flow channel 112 to the first circulation flow channel 111, and improve the reliability of the thermostat 10.

[0052] As shown in the figure, Figure 4As shown in the figure, in some embodiments of the present application, the inner diameter of the valve body 131 gradually decreases in the direction from the inlet end 1312 to the outlet end 1313. Due to the gradual decrease of the inner diameter of the valve body 131, the moving part 132 will abut against part of the inner wall of the valve body 131 during movement, thereby limiting the movement distance of the moving part 132 and avoiding the moving part 132 from leaving the moving cavity 1311. Optionally, part of the inner wall of the valve body 131 can be formed with a flow channel, thereby avoiding the moving part 132 from closing the outlet end 1313.

[0053] As shown in the figure, Figure 4 As shown in the figure, in some embodiments of the present application, the exhaust valve 13 can further include an elastic member 133. The elastic member 133 can be arranged in the moving cavity 1311 and can be arranged adjacent to the outlet end 1313. One end of the elastic member 133 can be fixedly connected with the inner wall of the valve body 131. Optionally, the elastic member 133 and the inner wall of the valve body 131 can be connected through clamping, insertion or other connection methods. The other end of the elastic member 133 can abut against the moving part 132. The elastic member 133 can play a role in restoring the moving part 132. Under the influence of the elastic force, the moving part 132 can abut against the limiting plate 1314 of the inlet end 1312. For example, when the pressure in the second circulation flow channel 112 approaches the pressure in the first circulation flow channel 111 during the large circulation of the engine coolant, the elastic member 133 can make the moving part 132 abut against the limiting plate 1314, thereby closing the inlet end 1312. Optionally, the elastic member 133 can also avoid the moving part 132 from closing the outlet end 1313. In a specific embodiment, the elastic member 133 can be configured as a spring.

[0054] The engine of the embodiment of the present application is briefly described below.

[0055] The engine according to the embodiment of the present application is provided with the thermostat device 10 of the above-mentioned embodiment. Since the engine according to the embodiment of the present application is provided with the thermostat device 10 of the above-mentioned embodiment, the thermostat device 10 of the engine can make the exhaust valve 13 axially communicate with the first circulation flow channel 111 and the second circulation flow channel 112 by arranging the exhaust valve 13 on the inner wall of the housing 11 or the thermostat member 12. The exhaust valve 13 can guide part of the gas and the coolant in the first circulation flow channel 111 into the second circulation flow channel 112 during operation, thereby effectively discharging the gas inside the engine cooling system, avoiding the cavitation problem of the thermostat member 12 and the engine water jacket, thereby improving the service life of the engine and ensuring the normal operation of the engine.

[0056] The vehicle of the embodiment of the present application is briefly described below.

[0057] The vehicle according to the embodiment of the application is provided with the engine according to the above embodiment, and the engine of the vehicle is provided with the thermostat device 10, which is configured to communicate the two ends of the exhaust valve 13 in the axial direction with the first circulation flow channel 111 and the second circulation flow channel 112 respectively by arranging the exhaust valve 13 on the inner wall of the housing 11 or the thermostat element 12, and the exhaust valve 13 is capable of guiding part of the gas and the coolant in the first circulation flow channel 111 into the second circulation flow channel 112 during operation, thereby effectively discharging the gas in the engine cooling system and improving the reliability of the vehicle.

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0059] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0060] In the description of the present application, "a plurality of" means two or more.

[0061] In the description of the present application, "above" or "below" the first feature in the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0062] In the description of the present application, "above", "over" and "on" the first feature in the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature.

[0063] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An air cleaner for an engine, characterized by comprising: The application relates to a shell (11) with a first circulation flow channel (111) and a second circulation flow channel (112) formed in the shell (11); a thermostat (12) arranged in the shell (11) and abutting against the inner wall of the shell (11), the thermostat (12) selectively connecting the first circulation flow channel (111) and the second circulation flow channel (112); and an exhaust valve (13) arranged on the inner wall of the shell (11) or the thermostat (12), the exhaust valve (13) being communicated with the first circulation flow channel (111) and the second circulation flow channel (112) at two axial ends, and the exhaust valve (13) being adapted to guide part of the gas and coolant in the first circulation flow channel (111) into the second circulation flow channel (112). The inner wall of the shell (11) is formed with a protrusion (113) extending towards the thermostat (12), the free end of the protrusion (113) abutting against the thermostat (12), and the protrusion (113) being formed with a communication channel (114) penetrating along the axial direction. The communication channel (114) is communicated with the first circulation flow channel (111) and the second circulation flow channel (112), and the exhaust valve (13) is arranged in the communication channel (114). The protrusion (113) is located on the top of the thermostat (12).

2. The EGR cooler according to claim 1, characterized by The thermostat (12) is provided with a spring seat (121) formed with a mounting hole penetrating along the axial direction. The exhaust valve (13) is arranged in the mounting hole.

3. The EGR cooler according to claim 2, characterized by The exhaust valve (13) comprises:

4. The EGR cooler according to claim 1, characterized by a valve body (131) formed with a moving cavity (1311) therein, two ends of the valve body (131) along the axial direction being formed with an inlet end (1312) and an outlet end (1313) respectively, the inlet end (1312) being communicated with the first circulation flow channel (111), and the outlet end (1313) being communicated with the second circulation flow channel (112); a moving piece (132) arranged in the moving cavity (1311), the moving piece (132) being selectively movable in the moving cavity (1311) to connect or disconnect the inlet end (1312) and the outlet end (1313).

5. The EGR cooler according to claim 2 or 4, characterized by The inner wall of the inlet end (1312) is formed with at least one radial limiting plate (1314); The moving piece (132) selectively abuts against the limiting plate (1314) to close the inlet end (1312). The inner diameter of at least part of the valve body (131) gradually decreases in the direction from the inlet end (1312) to the outlet end (1313).

6. The EGR cooler according to claim 5, characterized by The exhaust valve (13) further comprises: ​ 7. The EGR cooler according to claim 5, characterized by ​ 8. The EGR cooler according to claim 5, characterized by ​ An elastic member (133) is arranged in the moving cavity (1311) and adjacent to the outlet end (1313), one end of the elastic member (133) is fixedly connected with the inner wall of the valve body (131), and the other end of the elastic member (133) is in abutment with the moving member (132).

9. An engine characterized by, An engine including the thermostat device according to any one of claims 1 to 8.

10. A vehicle characterized by comprising: An engine including the thermostat device according to claim 9.

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