Thermostat, engine cooling system and vehicle

Abstract

The utility model relates to the technical field of vehicle engineering, and provides a thermostat, an engine cooling system and a vehicle. The main valve and the auxiliary valve are both installed on the valve element, and the valve element can selectively seal the first flow channel through the main valve or seal the second flow channel through the auxiliary valve. The side, facing the second runner, of the auxiliary valve is punched to form a first mounting groove, and a boss is formed on the side, opposite to the second runner, of the auxiliary valve on the outer side wall of the first mounting groove. The boss is partially sleeved with the first elastic piece, the first elastic piece abuts against the edge of the auxiliary valve, and the first elastic piece enables the auxiliary valve to have the trend of moving towards the side where the first flow channel is located all the time. The sealing piece is partially filled in the first mounting groove and used for being sealed with the end face of the port of the second flow channel. Thus, the first mounting groove is punched in the auxiliary valve, the sealing piece can be conveniently mounted, the first elastic piece can be straightened, the punching machining mode is simple, reinforcing ribs of the auxiliary valve are formed on the inner side wall and the outer side wall of the first mounting groove, and the mechanical structure of the auxiliary valve can be reinforced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle engineering, in particular to a thermostat, an engine cooling system and a vehicle. Background Technique

[0002] The thermostat is an essential valve component in all diesel engines. Its function is to control the large and small cycles of the engine cooling system, prevent the engine water temperature from being too low or too high, and enable the engine to always operate within the optimal water temperature range.

[0003] Specifically, the thermostat is connected to the radiator through the first flow channel to form a large cycle, and is connected to the water pump through the second flow channel to form a small cycle. The valve core of the thermostat can selectively open one of the flow channels according to the temperature change.

[0004] However, it is found in use that when the large cycle is executed, part of the coolant can still enter the second flow channel, resulting in the inability of the coolant to be concentrated for cooling by the radiator. The reason is that the secondary valve used to block the second flow channel and the base provided with the second flow channel belong to a rigid sealing structure, and it is easy to have a situation of poor sealing under the influence of water pressure fluctuations. And according to multiple test data, at the moment when the secondary valve contacts the base, due to the influence of the interaction force, the swing amplitude of the secondary valve is obvious and the leakage situation is serious. Therefore, there is an urgent need for a thermostat, an engine cooling system and a vehicle to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a thermostat, an engine cooling system and a vehicle, which can reduce the influence of water pressure fluctuations on the sealing effect between the secondary valve and the port of the second flow channel.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A thermostat is installed between the first flow channel and the second flow channel. It is characterized in that the thermostat includes:

[0008] A valve core;

[0009] A main valve and a secondary valve. The main valve and the secondary valve are both installed on the valve core. The valve core can selectively close the first flow channel through the main valve, or close the second flow channel through the secondary valve; a first installation groove is formed by stamping on the side of the secondary valve facing the second flow channel, and a convex platform is formed on the side of the outer side wall of the first installation groove of the secondary valve facing away from the second flow channel;

[0010] A first elastic member. The first elastic member is partially sleeved outside the convex platform and abuts against the edge of the secondary valve. The first elastic member makes the secondary valve always have a tendency to move towards the side where the second flow channel is located;

[0011] A seal, which is partially filled in the first installation groove and is used to seal the port end face of the second flow channel.

[0012] As a preferred technical solution of the thermostat, on the side facing away from the second flow channel, a flange is formed at the edge of the sub-valve, and part of the first elastic member is located between the flange and the outer side wall of the first installation groove.

[0013] As a preferred technical solution of the thermostat, the valve core includes a first shaft section and a second shaft section. The shaft diameter of the first shaft section is smaller than that of the second shaft section. The first elastic member is sleeved on the first shaft section. The first elastic member is a conical spring, and its small end abuts against the first shoulder formed by the first shaft section and the second shaft section, and its large end abuts against the sub-valve.

[0014] As a preferred technical solution of the thermostat, the sub-valve is provided with a first through hole. The first shaft section passes through the first through hole and is fixed to the tray. The radius of the tray is larger than the radius of the first through hole.

[0015] As a preferred technical solution of the thermostat, the valve core includes a third shaft section and a second shaft section. The shaft diameter of the third shaft section is larger than that of the second shaft section. A second shoulder is formed between the third shaft section and the third shaft section. The second elastic member is sleeved on the second shaft section, and the second elastic member makes the main valve abut against the second shoulder.

[0016] As a preferred technical solution of the thermostat, the second shoulder is an inclined surface, the inner peripheral wall of the main valve is a corresponding inclined surface, and the inner peripheral wall of the main valve is at least partially attached to the second shoulder.

[0017] As a preferred technical solution of the thermostat, it further includes a first bracket, which is fixed at the port of the first flow channel, and one end of the valve core is fixed to the first bracket.

[0018] As a preferred technical solution of the thermostat, it further includes a second bracket, which is fixedly opposite to the first bracket. The second bracket includes a bushing support, the bushing support is sleeved on the valve core, and the other end of the second elastic member abuts against the bushing support.

[0019] There is also provided an engine cooling system, including the above-mentioned thermostat

[0020] There is also provided a vehicle, including the above-mentioned engine cooling system.

[0021] Advantages of the present utility model:

[0022] The first flow channel is used to connect with the radiator to form a large circulation, and the second flow channel is used to connect with the water pump to form a small circulation; both the main valve and the auxiliary valve are installed on the valve core. The valve core can switch between its first state and second state according to the temperature change. When the actual temperature is below the preset temperature and the valve core is in the first state, the valve core blocks the port of the first flow channel through the main valve. At this time, the auxiliary valve opens the second flow channel; when the actual temperature is above the preset temperature and the valve core is in the second state, the valve core blocks the port of the second flow channel through the auxiliary valve. At this time, the main valve opens the first flow channel. A first elastic member is provided. The first elastic member always moves the auxiliary valve toward the side of the port of the second flow channel, so that the auxiliary valve can seal the second flow channel, and the first elastic member abuts against the edge of the auxiliary valve to avoid bending deformation of the edge of the auxiliary valve caused by stress concentration. Further, a first installation groove is stamped on the auxiliary valve. The opening in the depth direction of the first installation groove faces the base. A sealing member is arranged in the first installation groove. A part of the sealing member is buried in the first installation groove, and the other part is exposed outside the first installation groove for abutting against the opening end face of the second flow channel, that is, the base, to form a soft contact, thereby strengthening the sealing effect. And a boss is formed on the outer peripheral wall of the first installation groove on the other side of the auxiliary valve to provide support for the first elastic member. One end of the first elastic member is sleeved on the boss, which can reduce the relative movement of the first elastic member relative to the auxiliary valve.

[0023] In this way, stamping the first installation groove on the auxiliary valve not only facilitates the installation of the sealing member, but also can straighten the first elastic member, and the stamping processing method is simple. At the same time, the inner and outer side walls of the first installation groove form reinforcing ribs of the auxiliary valve, which can strengthen the mechanical structure of the auxiliary valve. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0025] Figure 1 It is a schematic structural diagram of the thermostat (excluding the sealing member, end cover and base) provided by the embodiment of the present invention;

[0026] Figure 2 It is a schematic structural diagram of the thermostat provided by the embodiment of the present invention;

[0027] Figure 3 It is Figure 2 The partial enlarged view of part A in

[0028] In the figure:

[0029] 10. Spool; 11. First shaft section; 12. Second shaft section; 13. Third shaft section; 14. First shaft shoulder; 15. Second shaft shoulder;

[0030] 20. Main valve;

[0031] 30. Sub - valve; 31. First installation groove; 32. Boss; 33. Flange; 34. Second installation groove;

[0032] 41. First elastic member; 42. Second elastic member;

[0033] 50. Seal;

[0034] 60. First bracket; 61. Support rib; 62. Mounting plate;

[0035] 70. Second bracket; 71. Connecting rib; 72. Bushing support;

[0036] 81. End cover; 82. Base; 90. Tray;

[0037] 100. First flow channel; 200. Second flow channel. Detailed implementation mode

[0038] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] As Figures 1 to 3 shown, the present utility model provides a thermostat, which is installed between a first flow channel 100 and a second flow channel 200. The thermostat includes a valve core 10, a main valve 20, a sub-valve 30, a first elastic member 41 and a seal member 50. Among them, both the main valve 20 and the sub-valve 30 are installed on the valve core 10. The valve core 10 can selectively close the first flow channel 100 through the main valve 20, or close the second flow channel 200 through the sub-valve 30; on the side of the sub-valve 30 facing the second flow channel 200, a first installation groove 31 is formed by stamping. On the outer side wall of the first installation groove 31, a boss 32 is formed on the side of the sub-valve 30 facing away from the second flow channel 200; a part of the first elastic member 41 is sleeved outside the boss 32 and abuts against the edge of the sub-valve 30. The first elastic member 41 makes the sub-valve 30 always have a tendency to move towards the side where the second flow channel 200 is located; a part of the seal member 50 is filled in the first installation groove 31 for sealing with the port end face of the second flow channel 200.

[0043] Specifically, the first flow channel 100 is used to communicate with the radiator to form a large cycle, and the second flow channel 200 is used to communicate with the water pump to form a small cycle; both the main valve 20 and the sub-valve 30 are installed on the valve core 10. The valve core 10 can switch its first state and second state according to the temperature change. When the actual temperature is below the preset temperature and the valve core 10 is in the first state, the valve core 10 blocks the port of the first flow channel 100 through the main valve 20. At this time, the sub-valve 30 opens the second flow channel 200; when the actual temperature is above the preset temperature and the valve core 10 is in the second state, the valve core 10 blocks the port of the second flow channel 200 through the sub-valve 30. At this time, the main valve 20 opens the first flow channel 100.

[0044] In this embodiment, the thermostat includes an end cover 81 and a base 82. The end cover 81 and the base 82 are fixed, and a cavity is formed inside. The valve core 10, the main valve 20, the sub-valve 30, the first elastic member 41, and the seal member 50 are all located in the cavity. Part of the first flow channel 100 is formed in the end cover 81, and the second flow channel 200 is formed in the base 82. Since the general seal between the sub-valve 30 and the base 82 is a rigid seal, it is prone to poor sealing under the influence of water pressure fluctuations.

[0045] Therefore, in this embodiment, a first elastic member 41 is provided. The first elastic member 41 causes the sub-valve 30 to always move towards the port side of the second flow channel 200, so that the sub-valve 30 can seal the second flow channel 200. Moreover, the first elastic member 41 abuts against the edge of the sub-valve 30, avoiding the bending deformation of the edge of the sub-valve 30 caused by stress concentration.

[0046] Furthermore, in this embodiment, a first installation groove 31 is stamped on the sub-valve 30. The opening in the depth direction of the first installation groove 31 faces the base 82. A seal member 50 is arranged in the first installation groove 31. Part of the seal member 50 is buried in the first installation groove 31, and the other part is exposed outside the first installation groove 31 for abutting against the opening end face of the second flow channel 200, that is, the base 82, to form a soft contact, thereby strengthening the sealing effect. And a boss 32 is formed on the outer peripheral wall of the first installation groove 31 on the other side of the sub-valve 30, providing support for the first elastic member 41. One end of the first elastic member 41 is sleeved on the boss 32, which can reduce the relative movement of the first elastic member 41 relative to the sub-valve 30.

[0047] In this way, stamping the first installation groove 31 on the sub-valve 30 is convenient for installing the seal member 50, can correct the position of the first elastic member 41, and the stamping processing method is simple. At the same time, the inner and outer side walls of the first installation groove 31 form reinforcing ribs of the sub-valve 30, which can strengthen the mechanical structure of the sub-valve 30.

[0048] Preferably, the first installation groove 31 is annular and is formed around the axis of the valve core 10.

[0049] In this embodiment, the valve core 10 is made of paraffin. When the valve core 10 is cooled, it can shrink, driving the main valve 20 and the sub-valve 30 to move towards the port of the first flow channel 100. The main valve 20 closes the first flow channel 100, and the sub-valve 30 opens the second flow channel 200. After the coolant at the outlet of the engine enters the thermostat, it enters the second flow channel 200 and returns to the engine through the water pump to form a small cycle; when heated, it can expand, driving the main valve 20 and the sub-valve 30 to move towards the port of the second flow channel 200. The main valve 20 then opens the first flow channel 100, and the sub-valve 30 closes the second flow channel 200. After the coolant at the outlet of the engine enters the thermostat, it enters the first flow channel 100 and flows through the radiator to form a large cycle.

[0050] It should be noted that the wax-type thermostat is a prior art, and the specific structure and expansion / contraction principle of the valve core 10 will not be elaborated here.

[0051] In other embodiments, the valve core 10 is electrically controlled, which includes a moving iron core, a moving iron core driving mechanism, etc. This is also a prior art. For the specific structure, reference can be made to the patent with the application number 202310746439.8 and the patent name of an electrically controlled integrated thermostat and control method, which will not be elaborated here.

[0052] Optionally, on the side facing away from the second flow channel 200, a flange 33 is formed at the edge of the sub-valve 30, and part of the first elastic member 41 is located between the flange 33 and the outer side wall of the first installation groove 31. Specifically, the flange 33 and the outer side wall of the first installation groove 31 form a second installation groove 34. One end of the first elastic member 41 is arranged in the second installation groove 34, and the relative displacement between the first elastic member 41 and the sub-valve 30 is restricted by the flange 33 and the outer side wall of the first installation groove 31.

[0053] Optionally, the valve core 10 includes a first shaft section 11 and a second shaft section 12. The shaft diameter of the first shaft section 11 is smaller than that of the second shaft section 12. The first elastic member 41 is sleeved on the first shaft section 11. The first elastic member 41 is a conical spring, the small end of which abuts against the first shoulder 14 formed by the first shaft section 11 and the second shaft section 12, and the large end of which abuts against the sub-valve 30. In this way, when the valve core 10 expands, the valve core 10 can further make the sub-valve 30 seal against the port end face of the second flow channel 200 by means of the first elastic member 41. And the radius of the large end of the conical spring is larger than that of the small end, so that the volume of the valve core 10 can be reduced.

[0054] Optionally, the auxiliary valve 30 is provided with a first through hole. The first shaft section 11 passes through the first through hole and is fixed to the tray 90. The radius of the tray 90 is greater than the radius of the first through hole. In this way, the tray 90 can support the auxiliary valve 30 on the side facing away from the main valve 20. Since the tray 90 is fixed to the valve core 10, the tray 90 can also straighten the auxiliary valve 30 and limit the swing of the auxiliary valve 30 relative to the valve core 10. At the same time, the tray 90 can also prevent the auxiliary valve 30 from falling off the first shaft section 11.

[0055] Specifically, after the first shaft section 11 passes through the first through hole, it is fixed to the tray 90 by a threaded fastener. The first shaft section 11 can also be fixed to the tray 90 by a clinching structure.

[0056] Optionally, the valve core 10 includes a third shaft section 13 and a second shaft section 12. The shaft diameter of the third shaft section 13 is greater than that of the second shaft section 12. A second shaft shoulder 15 is formed between the third shaft section 13 and the third shaft section 13. The second elastic member 42 is sleeved on the second shaft section 12. The second elastic member 42 makes the main valve 20 abut against the second shaft shoulder 15. In this way, the valve core 10 can strengthen the sealing performance between the main valve 20 and the port of the first flow channel 100 through the second elastic member 42.

[0057] Specifically, both the first elastic member 41 and the second elastic member 42 are sleeved on the valve core 10. During use, when the valve core 10 is in the first state, that is, the main valve 20 blocks the first flow channel 100 and the auxiliary valve 30 opens the second flow channel 200, at this time, the first elastic member 41 is further compressed; when the valve core 10 is in the second state, that is, the main valve 20 opens the first flow channel 100 and the auxiliary valve 30 closes the second flow channel 200, at this time, the second elastic member 42 is further compressed, and the first elastic member 41 extends to abut against the opening end face of the auxiliary valve 30 and the second flow channel 200.

[0058] Optionally, the second shaft shoulder 15 is an inclined surface, the inner peripheral wall of the main valve 20 is a corresponding inclined surface, and at least part of the inner peripheral wall of the main valve 20 is in contact with the second shaft shoulder 15.

[0059] Optionally, the thermostat further includes a first bracket 60. The first bracket 60 is fixed at the port of the first flow channel 100, and one end of the valve core 10 is fixed to the first bracket 60.

[0060] Specifically, the first bracket 60 includes a mounting plate 62 and a support rib 61. The mounting plate 62 is fixed to the support rib 61. The mounting plate 62 is fixed to the base 82 and / or the end cap 81 and is installed at the port position of the first flow channel 100. The mounting plate 62 is provided with a second through hole which communicates with the port of the first flow channel 100. The support rib 61 is in a bow shape, and its two ends are fixed to the mounting plate 62. The support rib 61 is located on the side of the mounting plate 62 facing away from the main valve 20. One end of the valve core 10 is inserted into the port of the first flow channel 100 and fixed to the support rib 61. In this way, when the valve core 10 expands due to heat, one end of it is restricted by the support rib 61 and cannot extend, so it can only extend towards the port of the second flow channel 200 through the other end.

[0061] Optionally, the thermostat further includes a second bracket 70. The second bracket 70 is fixedly opposed to the first bracket 60. The second bracket 70 includes a bushing support 72. The bushing support 72 is sleeved on the valve core 10, and the other end of the second elastic member 42 abuts against the bushing support 72.

[0062] Specifically, the second bracket 70 includes a connecting rib 71 and a bushing support 72. The connecting rib 71 connects the first bracket 60 and the bushing support 72.

[0063] An engine cooling system is also provided, which includes the above-mentioned thermostat.

[0064] A vehicle is also provided, which includes the above-mentioned engine cooling system.

[0065] In addition, the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A thermostat installed between a first flow channel (100) and a second flow channel (200), characterized in that, The thermostat includes: A valve core (10); A main valve (20) and a sub-valve (30). The main valve (20) and the sub-valve (30) are both installed on the valve core (10). The valve core (10) can selectively close the first flow channel (100) through the main valve (20) or close the second flow channel (200) through the sub-valve (30). On the side of the sub-valve (30) facing the second flow channel (200), a first installation groove (31) is formed by stamping. On the side of the outer wall of the first installation groove (31) facing away from the second flow channel (200) of the sub-valve (30), a boss (32) is formed. A first elastic member (41). The first elastic member (41) is partially sleeved outside the boss (32) and abuts against the edge of the sub-valve (30). The first elastic member (41) makes the sub-valve (30) always have a tendency to move towards the side where the second flow channel (200) is located. A seal (50). The seal (50) is partially filled in the first installation groove (31) and is used for sealing with the port end face of the second flow channel (200).

2. The thermostat according to claim 1, characterized in that, On the side facing away from the second flow channel (200), a flanging (33) is formed at the edge of the sub-valve (30). Part of the first elastic member (41) is located between the flanging (33) and the outer wall of the first installation groove (31).

3. The thermostat according to claim 2, characterized in that, The valve core (10) includes a first shaft section (11) and a second shaft section (12). The shaft diameter of the first shaft section (11) is smaller than the shaft diameter of the second shaft section (12). The first elastic member (41) is sleeved on the first shaft section (11). The first elastic member (41) is a conical spring, and its small end abuts against the first shoulder (14) formed by the first shaft section (11) and the second shaft section (12), and its large end abuts against the sub-valve (30).

4. The thermostat according to claim 3, characterized in that, The sub-valve (30) is provided with a first through hole. The first shaft section (11) passes through the first through hole and is fixed to a tray (90). The radius of the tray (90) is larger than the radius of the first through hole.

5. The thermostat according to claim 1, characterized in that The valve core (10) includes a third shaft section (13) and a second shaft section (12). The shaft diameter of the third shaft section (13) is larger than the shaft diameter of the second shaft section (12). A second shoulder (15) is formed between the third shaft section (13) and the third shaft section (13). A second elastic member (42) is sleeved on the second shaft section (12). The second elastic member (42) makes the main valve (20) abut against the second shoulder (15).

6. The thermostat according to claim 5, characterized in that, The second shoulder (15) is an inclined surface. The inner peripheral wall of the main valve (20) is a corresponding inclined surface. The inner peripheral wall of the main valve (20) and the second shoulder (15) are at least partially fitted.

7. The thermostat according to claim 5, characterized in that, It further includes a first bracket (60). The first bracket (60) is fixed at the port of the first flow channel (100). One end of the valve core (10) is fixed to the first bracket (60).

8. The thermostat according to claim 7, characterized in that, Further included is a second bracket (70), the second bracket (70) is fixedly opposed to the first bracket (60), the second bracket (70) includes a bushing support (72), the bushing support (72) is sleeved on the valve core (10), and the other end of the second elastic member (42) abuts against the bushing support (72).

9. Engine cooling system, characterized in that, Including the thermostat according to any one of claims 1-8.

10. A vehicle, characterized in that, Including the engine cooling system according to claim 9.

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