Exhaust valve, fuel tank system, and vehicle

Abstract

An exhaust valve (100), a fuel tank system (1000), and a vehicle. The exhaust valve comprises: a valve body (10), a first valve core (20), and a second valve core (30). A first chamber (11) and a second chamber (12) in communication with each other are formed in the valve body, the first chamber is provided with an exhaust port (13) in communication with the exterior of a fuel tank (200), and the second chamber is provided with an intake port (14) in communication with the interior of the fuel tank. The first valve core is arranged in the first chamber, and the first valve core has a first communication position where the exhaust port and the second chamber are in communication, and a first sealing position where the exhaust port and the second chamber are isolated. The second valve core is arranged in the second chamber, and the second valve core has a second communication position where the intake port and the first chamber are in communication, and a second sealing position where the intake port and the first chamber are isolated.

Description

Exhaust valve, oil tank system and vehicle

[0001] Cross-reference to related applications

[0002] The present application is based on and claims priority to Chinese Patent Application No. 202411097736.5, filed on August 12, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of oil tank, in particular to an exhaust valve, an oil tank system and a vehicle. BACKGROUND

[0004] In the related art, in order to ensure the balance of the internal and external pressure of the oil tank, an exhaust valve is arranged on the oil tank to communicate the inside and outside of the oil tank, so as to control the flow of gas between the inside and outside of the oil tank and maintain the balance of the internal and external pressure of the oil tank. However, the exhaust valve needs to maintain the balance of the internal pressure of the oil tank while reducing or avoiding the leakage of oil in the oil tank through the exhaust valve, which makes the overall structure of the exhaust valve complex, increases the cost of the exhaust valve and increases the difficulty of arranging the exhaust valve in the oil tank. SUMMARY

[0005] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, one purpose of the present disclosure is to provide an exhaust valve which can integrate two valve cores on one valve body to simplify the structure of the exhaust valve.

[0007] Another purpose of the present disclosure is to provide an oil tank system having the above-mentioned exhaust valve.

[0008] Still another purpose of the present disclosure is to provide a vehicle having the above-mentioned exhaust valve or the above-mentioned oil tank system.

[0009] The exhaust valve according to the embodiments of the present disclosure comprises: a valve body, the valve body is provided with a first chamber and a second chamber which are in communication with each other, the first chamber has an exhaust port which communicates with the outside of an oil tank, and the second chamber has an air inlet port which communicates with the inside of the oil tank; a first valve core, the first valve core is arranged in the first chamber, the first valve core has a first open position for opening the exhaust port and the second chamber and a first sealing position for sealing the exhaust port and the second chamber; and a second valve core, the second valve core is arranged in the second chamber, the second valve core has a second open position for opening the air inlet port and the first chamber and a second sealing position for sealing the air inlet port and the first chamber.

[0010] According to the exhaust valve, the first valve core and the second valve core are integrated on the valve body, so that the structure of the exhaust valve is simplified, the manufacturing cost of the exhaust valve is reduced, and the volume of the exhaust valve is reduced, and the exhaust valve is arranged in the oil tank.

[0011] Additional aspects and advantages of the present disclosure will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0012] FIG. 1 is a perspective view of an exhaust valve according to an embodiment of the present disclosure;

[0013] FIG. 2 is a structural view of the second valve core of the exhaust valve according to an embodiment of the present disclosure in a second open position;

[0014] FIG. 3 is a structural view of the second valve core of the exhaust valve according to the embodiment shown in FIG. 2 in a second sealing position;

[0015] FIG. 4 is a structural view of the second valve core of the exhaust valve according to another embodiment of the present disclosure in a second open position;

[0016] FIG. 5 is a structural view of the second valve core of the exhaust valve according to the embodiment shown in FIG. 4 in an intermediate position;

[0017] FIG. 6 is a structural view of the second valve core of the exhaust valve according to the embodiment shown in FIG. 4 in a second sealing position;

[0018] FIG. 7 is a bottom view of the exhaust valve according to an embodiment of the present disclosure;

[0019] FIG. 8 is a structural view of an oil tank system according to an embodiment of the present disclosure.

[0020] Reference signs: oil tank system 1000, exhaust valve 100, valve body 10, first chamber 11, vent passage 111, upper passage 1111, lower passage 1112, first valve chamber 112, vertical partition plate 113, second chamber 12, exhaust port 13, intake port 14, communication chamber 15, upper communication port 16, lower communication port 17, main communication port 171, auxiliary communication port 172, side tilt port 18, liquid leakage hole 19, first valve core 20, second valve core 30, main valve core 31, sub valve core 32, containing groove 33, vent hole 34, second elastic member 35, sealing protrusion 36, first elastic member 40, guide column 50, oil tank 200, exhaust pipeline 300, anti-tilt valve 400, carbon canister 500. DETAILED DESCRIPTION

[0021] The embodiments of the present disclosure 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 the purpose of explanation, and are not to be understood as a limitation of the present disclosure.

[0022] In the description of the present disclosure, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure 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 disclosure. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0023] In the description of the present disclosure, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure 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 disclosure. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0024] The exhaust valve 100, the oil tank system 1000 and the vehicle according to the embodiments of the present disclosure are described below with reference to the drawings.

[0025] As shown in FIGS. 1-3, the exhaust valve 100 according to the embodiments of the present disclosure comprises a valve body 10, a first valve core 20 and a second valve core 30.

[0026] The valve body 10 is provided with a first chamber 11 and a second chamber 12 which are in communication with each other. The first chamber 11 is provided with an exhaust port 13 which is in communication with the outside of the oil tank 200. The second chamber 12 is provided with an intake port 14 which is in communication with the inside of the oil tank 200. The first valve core 20 is arranged in the first chamber 11. The first valve core 20 has a first open position in which the exhaust port 13 and the second chamber 12 are in communication, and a first sealing position in which the exhaust port 13 and the second chamber 12 are separated. The second valve core 30 is arranged in the second chamber 12. The second valve core 30 has a second open position in which the intake port 14 and the first chamber 11 are in communication, and a second sealing position in which the intake port 14 and the first chamber 11 are separated.

[0027] It can be understood that when the first valve core 20 and the second valve core 30 are both in the second open position, the intake port 14 and the exhaust port 13 are in communication through the first chamber 11 and the second chamber 12, thereby balancing the pressure difference between the intake port 14 and the exhaust port 13. When the first valve core 20 is in the first sealing position or the second valve core 30 is in the second sealing position, the communication between the intake port 14 and the exhaust port 13 is blocked, thereby reducing or avoiding the liquid at the intake port 14 from flowing to the exhaust port 13 and leaking from the exhaust valve 100. Furthermore, if the first valve core 20 is in the first sealing position and the second valve core 30 is in the second sealing position, two layers of blocking can be formed between the intake port 14 and the exhaust port 13, thereby further reducing or avoiding the liquid at the intake port 14 from flowing to the exhaust port 13 and leaking from the exhaust valve 100.

[0028] Therefore, the exhaust valve 100 can balance the pressure difference between the intake port 14 and the exhaust port 13 by adjusting the positions of the first valve core 20 and the second valve core 30 to make the intake port 14 and the exhaust port 13 in communication, and can block the liquid from flowing from the intake port 14 to the exhaust port 13 by adjusting the position of the first valve core 20 or the second valve core 30.

[0029] The exhaust valve 100 of the present application can simplify the structure of the exhaust valve 100, reduce the manufacturing cost of the exhaust valve 100, and reduce the volume of the exhaust valve 100, thereby facilitating the arrangement of the exhaust valve 100 in the oil tank 200.

[0030] In some embodiments, as shown in FIGS. 1-3, the exhaust port 13 is located above the intake port 14, and the first chamber 11 is located above the second chamber 12.

[0031] It can be understood that the intake port 14 and the exhaust port 13 are in communication with different spaces. The liquid flows downward under the action of gravity.

[0032] Thus, the exhaust port 13 is located above the intake port 14, which can reduce or avoid the liquid flowing from the intake port 14 to the exhaust port 13, so as to reduce or avoid the liquid flowing upward from the intake port 14 to the exhaust port 13 when the first valve core 20 is in the first conducting position and the second valve core 30 is in the second conducting position, i.e. reduce or avoid the liquid flowing out of the exhaust port 13 at the intake port 14.

[0033] The first chamber 11 is located above the second chamber 12, so that the liquid in the first chamber 11 can flow to the second chamber 12 under the action of gravity, thereby reducing or avoiding the liquid remaining in the first chamber 11, i.e. reducing or avoiding the liquid flowing out of the exhaust port 13 in the first chamber 11.

[0034] In some embodiments, when the liquid enters the second chamber 12 from the intake port 14, the second valve core 30 is subjected to the buoyancy of the liquid to move to the second sealing position, thereby reducing or avoiding the liquid in the second chamber 12 entering the first chamber 11, so that the second valve core 30 can automatically cut off the intake port 14 and the first chamber 11.

[0035] In some embodiments, as shown in FIG. 2 and FIG. 3, the first valve core 20 is arranged to move in the first chamber 11 along the first direction to switch between the first conducting position and the first sealing position. Thus, the first valve core 20 moves in the first chamber 11 along the fixed direction, which can improve the stability of the first valve core 20 moving between the first conducting position and the first sealing position.

[0036] In some embodiments, the first direction is a horizontal direction, which can reduce the movement space of the first valve core 20 in the vertical direction, thereby reducing the size of the first chamber 11 in the vertical direction, which is conducive to reducing the size of the valve body 10, i.e. reducing the volume of the exhaust valve 100.

[0037] In some embodiments, the first chamber 11 includes an air passage 111 and a first valve chamber 112, the air passage 111 communicates with the second chamber 12, the first valve chamber 112 communicates with the exhaust port 13, the first valve core 20 is located in the first valve chamber 112, and the first valve chamber 112 and the air passage 111 are arranged along the first direction.

[0038] Thus, the second chamber 12, the air passage 111 and the first valve chamber 112 are sequentially communicated, and the first valve chamber 112 and the air passage 111 are arranged along the first direction, so that the first valve core 20 can move to the first sealing position in the first valve chamber 112 to cut off the air passage 111 and the first valve chamber 112, thereby achieving the cut-off between the second chamber 12 and the exhaust port 13.

[0039] In some embodiments, a vertical partition 113 is arranged between the vent passage 111 and the first valve chamber 112, and the vertical partition 113 is provided with an intermediate air port. The first valve core 20 is located at the first sealing position when the first valve core 20 cooperates with the intermediate air port, and the first valve core 20 is located at the first conduction position when the first valve core 20 is away from the intermediate air port.

[0040] Thus, when the first valve core 20 is located at the first sealing position by cooperating with the intermediate air port, the first valve core 20 blocks the first valve chamber 112 and the vent passage 111, thereby achieving the blocking between the second chamber 12 and the exhaust port 13. When the first valve core 20 is located at the first conduction position by being away from the intermediate air port, the first chamber 11 and the vent passage 111 are communicated, thereby achieving the communication between the second chamber 12 and the exhaust port 13.

[0041] In some embodiments, the vent passage 111 includes a lower passage 1112 and an upper passage 1111 which are communicated. In the second direction, the upper passage 1111 is located above the lower passage 1112. The lower end of the lower passage 1112 is communicated with the second chamber 12, and the horizontal side of the upper passage 1111 is the vertical partition 113 provided with the intermediate air port.

[0042] Thus, the vent passage 111 is communicated with the first valve chamber 112 through the upper passage 1111. When the first valve core 20 is located at the first sealing position, the first valve core 20 cooperates with the vertical partition 113 to seal the intermediate air port, thereby achieving the blocking between the first valve chamber 112 and the vent passage 111.

[0043] In some embodiments, the lower passage 1112 extends along the first direction, and the upper passage 1111 extends along the second direction. A part of the projection of the lower passage 1112 along the second direction overlaps the projection of the upper passage 1111 along the second direction.

[0044] Thus, the flow area of the gas entering the lower passage 1112 along the second direction can be improved, and the flow area of the gas flowing from the upper vent 16 to the first valve chamber 112 along the first direction can be improved. Thus, the flow rate of the gas entering the vent passage 111 and the flow rate of the gas flowing out of the vent passage 111 can be improved, that is, the flow rate of the gas flowing through the vent passage 111 per unit time can be improved.

[0045] In some embodiments, as shown in FIG. 2 and FIG. 3, the valve body 10 further includes a communication chamber 15. The communication chamber 15 is provided with an upper vent 16 communicated with the first chamber 11 and a lower vent 17 communicated with the second chamber 12. In the second direction, the communication chamber 15 is located between the first chamber 11 and the second chamber 12.

[0046] Thus, the first chamber 11 and the second chamber 12 are communicated through the communicating cavity 15, and the communicating cavity 15 can form a buffer space between the first chamber 11 and the second chamber 12. When the liquid enters the second chamber 12 from the air inlet 14, the communicating cavity 15 can separate the first chamber 11 and the second chamber 12, so as to reduce or avoid the liquid flowing from the second chamber 12 to the first chamber 11 through the communicating cavity 15.

[0047] In some embodiments, when the ventilation passage 111 includes the communicating lower passage 1112 and the upper passage 1111, the communicating cavity 15 is communicated with the lower passage 1112 through the upper through hole 16, so as to realize the communication between the ventilation passage 111 and the communicating cavity 15.

[0048] In some embodiments, when the second valve core 30 is located at the second sealing position, the second valve core 30 closes the lower through hole 17. At this time, the second valve core 30 separates the second chamber 12 and the communicating cavity 15, and the communicating cavity 15 can be communicated with the first chamber 11 through the upper through hole 16, so as to realize the separation between the first chamber 11 and the air inlet 14.

[0049] In some embodiments, in the second direction, the second valve core 30 is adapted to move under the action of an external force to close the lower through hole 17.

[0050] It should be noted that the external force is the force other than the gravity and the supporting force in the direction of the gravity. For example, when the liquid enters the second chamber 12, the buoyancy of the liquid on the second valve core 30 is the external force on the second valve core 30. That is, when the liquid in the second valve core 30 reaches a certain amount, the second valve core 30 can be kept at the second sealing position to ensure the separation between the second chamber 12 and the communicating cavity 15, so as to reduce or avoid the liquid flowing to the first chamber 11.

[0051] Thus, the second valve core 30 can be affected by the environment of the exhaust valve 100, and move under the action of the external force of the environment to close the lower through hole 17, so as to reduce or avoid the liquid flowing to the first chamber 11 and leaking from the exhaust port 13, and improve the reliability of the exhaust valve 100.

[0052] In some embodiments, the second direction is vertical. When the second spool 30 is moved upward by an external force to close the lower port 17, if there is liquid in the communication chamber 15, the liquid will flow above the second spool 30. At this time, the liquid can generate a downward force on the second spool 30 under the action of gravity, so that the second spool 30 can move downward to leave the lower port 17, thereby enabling the liquid in the communication chamber 15 to flow downward to the second chamber 12 through the lower port 17. When the liquid in the communication chamber 15 flows into the second chamber 12, the second spool 30 is no longer subjected to the downward force generated by the liquid gravity, so that the second spool 30 returns to the second sealing position under the action of the external force and closes the lower port 17.

[0053] For example, when the exhaust valve 100 is applied to the oil tank 200, after the oil tank 200 is filled for the first time, the oil in the oil tank 200 enters the second chamber 12 through the air inlet 14, so that the second spool 30 floats up and closes the lower port 17, thereby reducing or avoiding the oil in the oil tank 200 from leaking out through the exhaust valve 100. When the oil tank 200 needs to be filled for the second time, the added oil can generate a downward pressure on the second spool 30 in the communication chamber 15, so that the second spool 30 can move downward to leave the lower port 17, enabling the oil in the communication chamber 15 to flow downward to the second chamber 12 through the lower port 17 and enter the oil tank 200, thereby achieving the second filling of the oil tank 200. After the second filling is completed, the second spool 30 can return to the second sealing position under the action of the external force and close the lower port 17, thereby maintaining the separation between the air inlet 14 and the air outlet 13 and reducing or avoiding the oil in the oil tank 200 from leaking out through the exhaust valve 100.

[0054] In some embodiments, the top of the second spool 30 is provided with a sealing protrusion 36. When the second spool 30 is in the second sealing position, at least part of the sealing protrusion 36 is inserted into the lower port 17.

[0055] It can be understood that the second spool 30 moves at least partially in the up-down direction between the second sealing position and the second conducting position. When the second spool 30 is in the second sealing position, at least part of the sealing protrusion 36 is inserted upward into the lower port 17.

[0056] Therefore, the lower port 17 can provide a limiting effect on the fitting position of the sealing protrusion 36, thereby improving the stability of the second spool 30 in the second sealing position.

[0057] In some embodiments, the cross section of the sealing protrusion 36 is consistent with the shape of the lower port 17. The cross section of the sealing protrusion 36 gradually decreases in the upward direction. The cross section area of the uppermost end of the sealing protrusion 36 is smaller than the area of the lower port 17, and the cross section area of the lowermost end of the sealing protrusion 36 is larger than the area of the lower port 17.

[0058] Thus, when the second valve core 30 is located at the second sealing position, the sealing protrusion 36 is partially inserted into the lower through hole 17, and the sealing protrusion 36 is in close contact with the edge of the lower through hole 17 on its side surface in the circumferential direction, so that the sealing protrusion 36 can seal the lower through hole 17, thereby improving the sealing between the communication cavity 15 and the second chamber 12, and further reducing or avoiding the liquid in the second chamber 12 flowing to the communication cavity 15 through the lower through hole 17.

[0059] In some embodiments, as shown in FIG. 2 and FIG. 3, a guide column 50 is further arranged in the second chamber 12, the guide column 50 extends in the second direction, and the second valve core 30 is slidingly connected to the guide column 50.

[0060] Thus, the guide column 50 can limit the moving direction of the second valve core 30, thereby improving the stability of the second valve core 30 moving between the second sealing position and the second open position, enabling the second valve core 30 to accurately move to the second sealing position, and ensuring the sealing effect of the second valve core 30 on the lower through hole 17 when the second valve core 30 is located at the second sealing position.

[0061] In some embodiments, the exhaust valve 100 further comprises a first elastic member 40 connected to the valve body 10 and the second valve core 30 to provide an upward pushing force to the second valve core 30.

[0062] Thus, when the second valve core 30 is located at the second open position, the first elastic member 40 can exert a tendency on the second valve core 30 to move along the guide column 50, even if the second valve core 30 has a tendency to move towards the second sealing position. When the exhaust valve 100 is tilted to a certain angle, the pressure of the second valve core 30 on the first elastic member 40 decreases, enabling the first elastic member 40 to push the second valve core 30 to move along the guide column 50 to the second sealing position, thereby achieving the separation of the second valve core 30 between the first chamber 11 and the second chamber 12.

[0063] When the second valve core 30 is located at the second sealing position, the first elastic member 40 can improve the stability of the second valve core 30 at the second sealing position.

[0064] In some embodiments, when the exhaust valve 100 is arranged in the oil tank 200, if the oil tank 200 is tilted, the first elastic member 40 can push the second valve core 30 to the second sealing position, thereby reducing or avoiding the leakage of oil from the exhaust valve 100.

[0065] In some embodiments, the first elastic member 40 is sleeved on the guide column 50, and a cavity is arranged on the second valve core 30, which cooperates with the guide column 50 to fix the second valve core 30. Thus, the guide column 50 can support the first elastic member 40 and limit the deformation direction of the first elastic member 40, thereby improving the stability of the pushing force of the first elastic member 40 on the second valve core 30.

[0066] In some embodiments, when the first elastic member 40 is a spring, the spring is sleeved on the guide column 50, and the spring is located between the second spool 30 and the guide column 50.

[0067] In some embodiments, as shown in FIG. 3, when the second spool 30 is located at the second sealing position, the second spool 30 is connected to the guide column 50. That is, the second spool 30 is connected to the guide column 50 between the second open position and the second sealing position. Thus, the stability of the second spool 30 when located at the second sealing position can be improved, and the stability of the second spool 30 when moving between the second open position and the second sealing position can be improved, thereby improving the reliability of the second spool 30, i.e., improving the reliability of the exhaust valve 100.

[0068] In some embodiments, as shown in FIG. 2 and FIG. 3, the valve body 10 further comprises a side-tilt port 18, the side-tilt port 18 is communicated with the communication cavity 15, and the side-tilt port 18 is adapted to be communicated with the anti-tilt valve 400.

[0069] It can be understood that, taking the exhaust valve 100 arranged in the oil tank 200 as an example, when the oil tank 200 is tilted or overturned, the air pressure in the oil tank 200 increases or the exhaust valve 100 bears part of the gravity of the oil, which is easy to cause oil leakage at the exhaust valve 100. When the anti-tilt valve 400 is not tilted or overturned, the anti-tilt valve 400 is opened to make the inside of the oil tank 200 communicated with the communication cavity 15 through the anti-tilt valve 400; when the anti-tilt valve 400 is tilted to a certain angle or overturned, the anti-tilt valve 400 is closed, and the inside of the oil tank 200 and the communication cavity 15 are sealed at the anti-tilt valve 400.

[0070] Thus, by arranging the side-tilt port 18 to be communicated with the anti-tilt valve 400, when the oil tank 200 is tilted to a certain angle or overturned, the anti-tilt valve 400 can be closed to seal the inside of the oil tank 200 and the communication cavity 15 at the anti-tilt valve 400, and the second spool 30 can be kept at the sealing position. Thus, the first chamber 11 can be isolated from the inside of the oil tank 200, and the liquid in the oil tank 200 can be reduced or avoided from entering the first chamber 11 and leaking from the exhaust port 13.

[0071] In some embodiments, as shown in FIG. 4-FIG. 6, the lower communication port 17 comprises a main communication port 171 and a sub-communication port 172 arranged at intervals, and the second spool 30 comprises a main spool 31 and a sub-spool 32.

[0072] When the second spool 30 is located at the second sealing position, the main spool 31 closes the main communication port 171, and the sub-spool 32 closes the sub-communication port 172. At this time, the communication cavity 15 and the second chamber 12 can be isolated, and the intake port 14 and the first chamber 11 can be isolated.

[0073] In some embodiments, when the second spool 30 is in the second open position, the main spool 31 is away from the main port 171, and the sub spool 32 is away from the sub port 172. At this time, the communication cavity 15 and the second chamber 12 are simultaneously communicated through the main port 171 and the sub port 172, which can improve the communication efficiency of the liquid and gas between the communication cavity 15 and the second chamber 12.

[0074] In some embodiments, the second spool 30 further has an intermediate position between the second open position and the second sealing position. When the second spool 30 is in the intermediate position, the main spool 31 closes the main port 171, and the sub spool 32 is away from the sub port 172. The second spool 30 moves sequentially between the second open position, the intermediate position, and the second sealing position.

[0075] It can be understood that, in the process that the second spool 30 moves from the second open position to the second sealing position, the main spool 31 first closes the main port 171 after the second spool 30 passes through the intermediate position, and the sub spool 32 closes the sub port 172 after the second spool 30 reaches the second sealing position.

[0076] Thus, the second chamber 12 and the communication cavity 15 have three communication conditions through the lower port 17.

[0077] When the second spool 30 is in the second open position, the main spool 31 is away from the main port 171, and the sub spool 32 is away from the sub port 172. At this time, the communication cavity 15 and the second chamber 12 are simultaneously communicated through the main port 171 and the sub port 172, which can improve the communication efficiency of the liquid and gas between the communication cavity 15 and the second chamber 12.

[0078] When the second spool 30 is in the intermediate position, the main spool 31 closes the main port 171, and the sub spool 32 is away from the sub port 172. The communication cavity 15 and the second chamber 12 are simultaneously communicated through the sub port 172.

[0079] When the second spool 30 is in the second sealing position, the main spool 31 closes the main port 171, and the sub spool 32 closes the sub port 172. At this time, the communication cavity 15 and the second chamber 12 can be isolated, thereby isolating the air inlet 14 and the first chamber 11.

[0080] In some embodiments, the main spool 31 is arranged in the second chamber 12, and the main spool 31 has a containing groove 33 and a vent hole 34. The containing groove 33 is open upward, and the vent hole 34 penetrates through the main spool 31 and communicates with the containing groove 33. The sub spool 32 is movably arranged in the containing groove 33, so that the containing groove 33 can define the movement space of the sub spool 32, thereby improving the stability of the movement of the sub spool 32.

[0081] Meanwhile, the sub-valve core 32 has a first position and a second position in the accommodating groove 33, the first position is higher than the second position. When the second valve core 30 is in the second sealing position, the sub-valve core 32 is in the first position to block the sub-passage 172 from the accommodating groove 33, and when the second valve core 30 is in the intermediate position, the sub-valve core 32 is in the second position and away from the sub-passage 172.

[0082] Therefore, when the second valve core 30 is in the intermediate position, the communication cavity 15, the accommodating groove 33, the vent hole 34 and the second chamber 12 are sequentially communicated, so as to realize the communication between the second chamber 12 and the communication cavity 15. Since the flow area of the vent hole 34 is small, the liquid in the second chamber 12 can be reduced or prevented from entering the communication cavity 15 from the accommodating groove 33 through the vent hole 34, and at the same time, the second chamber 12 and the communication cavity 15 can be communicated to balance the pressure difference between the second chamber 12 and the communication cavity 15.

[0083] In some embodiments, the vent hole 34 is higher than the air inlet 14, so as to reduce or prevent the liquid entering the second chamber 12 from the air inlet 14 from entering the vent hole 34.

[0084] In some embodiments, as shown in FIGS. 4-6, the second valve core 30 further comprises a second elastic member 35 connected to the main valve core 31 and the sub-valve core 32 to provide an upward pushing force to the sub-valve core 32.

[0085] Therefore, when the sub-valve core 32 is in the first position, the second elastic member 35 can apply a tendency to the sub-valve core 32 to move along the guide column 50, even if the sub-valve core 32 has a tendency to move towards the second position. When the exhaust valve 100 is tilted to a certain angle, the pressure of the sub-valve core 32 on the second elastic member 35 is reduced, so that the second elastic member 35 can push the sub-valve core 32 to move to the second position along the guide column 50. The sub-valve core 32 realizes the blocking between the communication cavity 15 and the accommodating groove 33. When the sub-valve core 32 is in the second position, the second elastic member 35 improves the stability of the sub-valve core 32 in the second position.

[0086] In some embodiments, when the exhaust valve 100 is arranged in the oil tank 200, when the oil tank 200 is tilted, the second elastic member 35 can push the sub-valve core 32 to the second position to block the communication cavity 15 and the accommodating groove 33, i.e. to block the air inlet 14 and the exhaust port 13, so as to reduce or prevent the oil from leaking out of the exhaust valve 100.

[0087] In some embodiments, as shown in FIG. 7, the bottom of the valve body 10 is provided with a leakage hole 19, which communicates the second chamber 12 with the inside of the oil tank 200. It can be understood that the leakage hole 19 communicates with the bottom of the second chamber 12.

[0088] Thus, the liquid at the bottom of the second chamber 12 can flow back to the space communicated with the air inlet 14 through the liquid leakage hole 19, so as to reduce or avoid the liquid residue in the second chamber 12.

[0089] In some embodiments, when the exhaust valve 100 is empty and horizontally placed, and the exhaust port 13 is located above the air inlet 14, the second valve core 30 is configured to be in the second open position, and the air inlet 14 is communicated with the first chamber 11. Thus, the second valve core 30 is in the second open position without external force, which ensures the communication between the air inlet 14 and the first chamber 11, and maintains the communication between the air inlet 14 and the exhaust port 13 when the first valve core 20 is in the first open position.

[0090] It should be noted that when the exhaust valve 100 includes the first elastic member 40, and the initial position of the second valve core 30 is the second open position, the gravity of the second valve core 30 is greater than the pushing force of the elastic member, and at this time, the second valve core 30 is subjected to the downward gravity, the upward pushing force from the elastic member, and the upward supporting force from the valve body 10.

[0091] It can be understood that when there is no liquid in the second chamber 12 or the exhaust valve 100 does not produce a roll, the second valve core 30 can remain in the second open position. When liquid enters the second chamber 12, the liquid can generate a buoyancy on the second valve core 30, so as to move the second valve core 30 to the second sealing position under the joint action of the buoyancy and the first elastic member 40. Or when the exhaust valve 100 produces a roll to a certain angle, the gravity of the second valve core 30 borne by the first elastic member 40 is reduced, and the first elastic member 40 can push the second valve core 30 to move to the second sealing position.

[0092] As shown in FIG. 8, the oil tank system 1000 according to the embodiments of the present disclosure includes an oil tank 200, an exhaust pipeline 300, and the exhaust valve 100 of the above embodiments. Wherein one end of the exhaust pipeline 300 is communicated with the outside of the oil tank 200, the air inlet 14 of the exhaust valve 100 is communicated with the inside of the oil tank 200, and the exhaust port 13 is communicated with the exhaust pipeline 300.

[0093] The oil tank system 1000 of the present application adopts the exhaust valve 100 of the above embodiments, and the exhaust valve 100 integrates the first valve core 20 and the second valve core 30 on the valve body 10, so as to simplify the structure of the exhaust valve 100, reduce the manufacturing cost of the exhaust valve 100, and reduce the volume of the exhaust valve 100, which is convenient for the arrangement of the exhaust valve 100 in the oil tank 200.

[0094] In some embodiments, as shown in FIG. 8, the valve body 10 further comprises a roll-over port 18 and a communication chamber 15, the communication chamber 15 is in communication with the first chamber 11 and the second chamber 12. The oil tank system 1000 further comprises a roll-over valve 400, the roll-over valve 400 is arranged on the oil tank 200, and the roll-over valve 400 is in communication with the roll-over port 18.

[0095] It can be understood that when the oil tank 200 is rolled over or overturned, the air pressure in the oil tank 200 increases or the exhaust valve 100 bears part of the gravity of the oil, which is easy to cause oil leakage at the exhaust valve 100. When the roll-over valve 400 is not rolled over or overturned, the roll-over valve 400 is opened to make the inside of the oil tank 200 and the communication chamber 15 communicate through the roll-over valve 400; when the roll-over valve 400 is rolled over to a certain angle or overturned, the roll-over valve 400 is closed, and the inside of the oil tank 200 and the communication chamber 15 are sealed at the roll-over valve 400.

[0096] Therefore, by arranging the roll-over port 18 to communicate with the roll-over valve 400, when the oil tank 200 is rolled over to a certain angle or overturned, the roll-over valve 400 can be closed to seal the inside of the oil tank 200 and the communication chamber 15 at the roll-over valve 400, and the second valve core 30 can be kept at the second sealing position. Therefore, the first chamber 11 can be cut off from the inside of the oil tank 200, and the liquid in the oil tank 200 can be reduced or prevented from entering the first chamber 11 and leaking from the exhaust port 13.

[0097] In some embodiments, as shown in FIG. 8, the oil tank system 1000 further comprises a carbon canister 500, the carbon canister 500 is connected to the exhaust pipeline 300. Therefore, the liquid vapor in the gas flowing from the exhaust valve 100 to the exhaust pipeline 300 can be absorbed in the carbon canister 500, so as to purify the gas finally discharged to the outside of the oil tank 200.

[0098] The exhaust valve 100, the oil tank system 1000 and the vehicle according to the embodiments of the present disclosure and other configurations and operations are known to those skilled in the art, and will not be described in detail herein.

[0099] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" 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 disclosure. 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.

[0100] Although embodiments of the disclosure have been shown and described, it will be apparent to those having ordinary skill in the art that a number of changes, modifications, alternatives, and variations can be made to the embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust valve, wherein, The valve body comprises a first chamber and a second chamber which are in communication with each other, the first chamber has an exhaust port which is in communication with the outside of an oil tank, and the second chamber has an intake port which is in communication with the inside of the oil tank; a first valve core is arranged in the first chamber, the first valve core has a first open position which is in communication with the exhaust port and the second chamber, and a first sealing position which is isolated from the exhaust port and the second chamber; a second valve core is arranged in the second chamber, the second valve core has a second open position which is in communication with the intake port and the first chamber, and a second sealing position which is isolated from the intake port and the first chamber. The exhaust port is located above the intake port, and the first chamber is located above the second chamber.

2. The exhaust valve of claim 1, wherein, The first valve core is arranged in the first chamber and moves in a first direction to switch between the first open position and the first sealing position.

3. The exhaust valve according to any one of claims 1 or 2, wherein, The first chamber comprises a ventilation passage which is in communication with the second chamber, and a first valve chamber which is in communication with the exhaust port, the first valve core is arranged in the first valve chamber, and the first valve chamber and the ventilation passage are arranged in the first direction.

4. The exhaust valve of claim 3, wherein, A vertical partition plate is arranged between the ventilation passage and the first valve chamber, the vertical partition plate is provided with an intermediate air port, the first valve core is located at the first sealing position when it cooperates with the intermediate air port, and the first valve core is located at the first open position when it is away from the intermediate air port.

5. The exhaust valve of claim 4, wherein, The ventilation passage comprises a lower passage and an upper passage which are in communication, the upper passage is located above the lower passage in a second direction, the lower end of the lower passage is in communication with the second chamber, and the horizontal side of the upper passage is the vertical partition plate which is provided with the intermediate air port.

6. The exhaust valve of claim 5, wherein, The lower passage extends in the first direction, the upper passage extends in the second direction, and a part of the projection of the lower passage in the second direction coincides with the projection of the upper passage in the second direction.

7. The exhaust valve of claim 6, wherein, The valve body further comprises a communication chamber which has an upper communication port which is in communication with the first chamber, and a lower communication port which is in communication with the second chamber, and the communication chamber is located between the first chamber and the second chamber in the second direction.

8. The exhaust valve of any one of claims 1-7, wherein, When the second valve core is located at the second sealing position, the second valve core closes the lower communication port.

9. The exhaust valve of claim 8, wherein, In the second direction, the second valve core is adapted to move under the action of an external force to close the lower communication port.

10. The exhaust valve as set forth in claim 8 or 9, wherein A guide column is further arranged in the second chamber, the guide column extends in the second direction, and the second valve core is slidingly connected to the guide column.

11. The exhaust valve according to any one of claims 6-9, wherein, Further comprising:

12. The exhaust valve of any one of claims 1-11, wherein, a first elastic member which is connected to the valve body and the second valve core to provide an upward thrust to the second valve core. The first elastic member is sleeved on the guide column, the second valve core is provided with a cavity, and the cavity cooperates with the guide column to fix the second valve core.

13. The exhaust valve of claim 12, wherein, When the second valve core is located at the second sealing position, the second valve core is connected to the guide column.

14. The exhaust valve of claim 11, wherein, The valve body further comprises a side tilt port which is in communication with the communication chamber and is adapted to be in communication with an anti-tilt valve.

15. The exhaust valve of any one of claims 8-10, wherein, ​ 16. The exhaust valve of any one of claims 8-10, wherein, The lower opening comprises a main opening and a sub opening arranged in sequence, and the second valve core comprises a main valve core and a sub valve core. When the second valve core is in the second sealing position, the main valve core closes the main opening, and the sub valve core closes the sub opening.

17. The exhaust valve of claim 16, wherein, When the second valve core is in the second conducting position, the main valve core is away from the main opening, and the sub valve core is away from the sub opening.

18. The exhaust valve of any one of claims 16-17, wherein, The second valve core further has an intermediate position between the second conducting position and the second sealing position, when the second valve core is in the intermediate position, the main valve core closes the main opening, and the sub valve core is away from the sub opening. The second valve core moves in sequence between the second conducting position, the intermediate position and the second sealing position.

19. The exhaust valve of any one of claims 16-18, wherein, The main valve core is arranged in the second chamber, and the main valve core has a containing groove and a vent hole, the containing groove is open upward, and the vent hole penetrates the main valve core and communicates with the containing groove. The sub valve core is movably arranged in the containing groove, and the sub valve core has a first position and a second position in the containing groove, the first position is higher than the second position. When the second valve core is in the second sealing position, the sub valve core is in the first position to cut off the sub opening from the containing groove, and when the second valve core is in the intermediate position, the sub valve core is in the second position and away from the sub opening.

20. The exhaust valve of claim 19, wherein, The vent hole is higher than the air inlet.

21. The exhaust valve of any one of claims 16-19, wherein, The second valve core further comprises a second elastic member, the second elastic member connects the main valve core and the sub valve core to provide upward thrust to the sub valve core.

22. The exhaust valve of any one of claims 1-21, wherein, The bottom of the valve body is provided with a leakage hole, and the leakage hole communicates the second chamber with the inside of the oil tank.

23. The exhaust valve of any one of claims 1-22, wherein, When the exhaust valve is empty and horizontally placed, and the exhaust port is above the air inlet, the second valve core is configured to be in the second conducting position, and the air inlet communicates with the first chamber.

24. An oil tank system, wherein, Comprising: An oil tank; An exhaust pipeline, one end of the exhaust pipeline communicates with the outside of the oil tank; The exhaust valve according to any one of claims 1-23, the air inlet of the exhaust valve communicates with the inside of the oil tank, and the exhaust port communicates with the exhaust pipeline.

25. The oil tank system of claim 24, wherein, The valve body further comprises a side tilt port and a communication chamber in communication, and the communication chamber communicates the first chamber and the second chamber. The oil tank system further comprises a roll-over valve, the roll-over valve is arranged on the oil tank, and the roll-over valve communicates with the side tilt port.

26. A vehicle, wherein, Comprising the oil tank system according to any one of claims 24-25; or, comprising the exhaust valve according to any one of claims 1-23.

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