A vehicle expansion jug

Abstract

A kind of vehicle expansion kettle, it is related to vehicle component technical field, including kettle body and kettle cover, the kettle body includes cavity and adjacent overflow channel of the cavity, the cavity is used to store coolant, the kettle cover includes movable piece located in the side close to the cavity, the movable piece is configured to be able to move under the action of coolant in the cavity, to make one end of the overflow channel can be communicated with the cavity, the other end of the overflow channel extends towards the side away from the kettle cover, and can be communicated with the outside of the kettle body, when coolant in the cavity overflows to the kettle cover, the movable piece moves under force, to make the cavity and the overflow channel communicate, the coolant enters the overflow channel, and can flow out of the kettle body by the overflow channel, overflow channel can play the guiding effect of coolant, facilitate to improve the use safety of expansion kettle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to a vehicle expansion tank. Background Technology

[0002] An expansion tank is usually installed in the engine compartment of a vehicle. The expansion tank is an important part of the vehicle's cooling system. It stores coolant and is connected to the vehicle's coolant pipes. When the coolant in the coolant pipes is heated and expands, the high-temperature coolant or the high-temperature, high-pressure gas-liquid mixture will enter the expansion tank. When the cooling system stops running, a negative pressure will be generated in the coolant pipes, drawing coolant from the expansion tank.

[0003] Because the expansion tank is directly involved in the circulation of coolant, when there is too much coolant in the expansion tank or the pressure inside the expansion tank is abnormal, coolant may overflow from the expansion tank. Sometimes the coolant will not directly open the lid of the expansion tank, but when the operator opens the lid, the high temperature and high pressure coolant will still spray out from the lid, which can easily burn the operator and poses a certain safety hazard. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a vehicle expansion tank that can guide the coolant at the tank cap away from the tank cap through the overflow channel, so as to avoid the coolant level being too high and spraying out from the tank cap, thereby improving the safety of the expansion tank.

[0005] This utility model provides a vehicle expansion tank, including a tank body and a lid. The tank body includes a cavity and an overflow channel adjacent to the cavity. The cavity is used to store coolant. The lid includes a movable member located near the cavity. The movable member is configured to move under the action of coolant in the cavity, so that one end of the overflow channel can communicate with the cavity, and the other end of the overflow channel extends away from the lid and can communicate with the outside of the tank body. When coolant overflows from the cavity to the lid, the movable member moves under force, so that the cavity and the overflow channel are connected, and the coolant enters the overflow channel and can flow out of the tank body through the overflow channel.

[0006] In one embodiment, at least one expansion member is connected to at least one side of the pot body in the length and width directions, and / or, at least one expansion member is connected to the side of the pot body in the height direction away from the pot lid, the expansion member including a collection cavity, the end of the overflow channel away from the pot lid communicating with the collection cavity, the collection cavity being used to store coolant from the overflow channel.

[0007] In one embodiment, the kettle body further includes at least one collecting cavity located on at least one side of the cavity in the length and width directions of the kettle body, and / or, the collecting cavity is located on the side of the cavity away from the lid in the height direction of the kettle body, and the end of the overflow channel away from the lid communicates with the collecting cavity, the collecting cavity being used to store coolant from the overflow channel.

[0008] In one embodiment, an air hole is provided on the wall of the collecting chamber, the air hole connecting the collecting chamber to the outside of the pot body, the air hole being used to make the air pressure inside the collecting chamber the same as the air pressure outside the pot body, and to discharge the gas inside the collecting chamber.

[0009] In one embodiment, a discharge port is provided on the wall of the collection chamber, the discharge port is connected to the outside of the collection chamber and the vessel body, and a valve body is installed at the discharge port.

[0010] In one embodiment, the cavity includes a first liquid storage cavity and at least one second liquid storage cavity, the first liquid storage cavity is in communication with the second liquid storage cavity, the position of the first liquid storage cavity is matched with the lid, and it can be connected to the overflow channel by the movement of the movable component.

[0011] In one embodiment, the overflow channel includes a first guide channel, which is adjacent to the first liquid storage chamber and extends along the height direction of the vessel body. One end of the first guide channel can communicate with the first liquid storage chamber through the movement of the movable member, and the other end communicates with the outside of the vessel body or with the collection chamber.

[0012] In one embodiment, the overflow channel further includes a second guide channel, one end of which is connected to one end of the first guide channel, and the other end is connected to the outside of the kettle body or to the collection chamber.

[0013] In one embodiment, a liquid level detection device is provided in the collection chamber, which is used to detect the liquid level of the coolant in the collection chamber in real time.

[0014] In one embodiment, the kettle body includes a first shell and a second shell. The first shell includes a first channel that extends along the height direction of the kettle body. The second shell includes a second channel that extends along the height direction of the kettle body. When the first shell and the second shell are connected, the first channel and the second channel cooperate to form the first guide channel.

[0015] The beneficial effects of this utility model are as follows: By setting an overflow channel inside the kettle body, the overflow channel can be connected to the cavity through the movement of the movable part on the inside of the kettle lid. When the coolant inside the kettle body is in a high temperature and high pressure state, or when the liquid level rises until it can exert a force on the movable part, the movable part moves away from the cavity, so that the coolant in the cavity can flow into the overflow channel. The coolant flows away from the kettle lid through the overflow channel and can be discharged to the outside of the kettle body through the overflow channel. The overflow channel guides the coolant when it exerts force on the moving parts within the cavity, thereby lowering the coolant level at the lid. This prevents scalding of operators from coolant spraying from the lid when adding coolant or performing maintenance. It effectively avoids coolant splashing, reduces the frequency of expansion tank overflows, and improves the safety of using the expansion tank. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an expansion pot according to an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view of an expansion pot according to an embodiment of the present invention.

[0019] Figure 3 This is a partial cross-sectional view of an expansion vessel according to an embodiment of the present invention.

[0020] Figure 4 This is a cross-sectional view of an expansion pot according to another embodiment of the present invention.

[0021] Figure 5 This is a cross-sectional view of an expansion pot according to another embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the first housing according to an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the second housing according to an embodiment of the present invention.

[0024] In the picture: 10-Pot body; 11-Pot lid; 111-Moving part; 112-Reset part; 12-First liquid storage chamber; 13-Second liquid storage chamber; 14-Collection chamber; 15-Air hole; 16-Valve body; 20 - Overflow channel; 21 - First guide channel; 22 - Second guide channel; 30 - Expansion parts; 40 - First housing; 41 - First component cavity; 42 - Second component cavity; 43 - First channel; 44 - First arc-shaped wall; 50 - Second shell; 51 - Third component cavity; 52 - Fourth component cavity; 53 - Second channel; 54 - Second arc-shaped wall. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0026] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0027] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar attributes, not to indicate or imply relative importance or a specific order.

[0029] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0030] like Figure 1As shown, the vehicle expansion tank proposed in this utility model includes a tank body 10 and a lid 11. The lid 11 is detachably installed on the tank body 10, and the operator can add coolant to the tank body 10 by removing the lid 11. Figure 2 The reservoir body 10 includes a cavity and an overflow channel 20 adjacent to the cavity. The cavity is used to store coolant and is connected to the coolant pipes of the vehicle's cooling system to achieve coolant circulation. Figure 3 The lid 11 includes a movable member 111 located near the cavity. The movable member 111 is configured to move under the action of coolant in the cavity so that one end of the overflow channel 20 can communicate with the cavity through the movement of the movable member 111, and the other end of the overflow channel 20 extends away from the lid 11 and can communicate with the outside of the pot body 10.

[0031] When the coolant inside the cavity overflows towards the lid 11, it exerts force on the movable part 111. The movable part 111 moves under the force of the coolant, making the cavity connected to the overflow channel 20. The coolant in the cavity flows into the overflow channel 20, flows away from the lid 11 through the overflow channel 20, and can flow out of the pot body 10 through the overflow channel 20.

[0032] By providing an overflow channel 20 inside the kettle body 10, the overflow channel 20 can communicate with the cavity on the inner side of the kettle lid 11 through the movement of the movable part 111. When the coolant inside the kettle body 10 is under high temperature and high pressure, or when its level rises until it can exert force on the movable part 111, the movable part 111 moves away from the cavity, allowing the coolant inside the cavity to flow into the overflow channel 20. The coolant flows away from the kettle lid 11 through the overflow channel 20, and through the overflow channel 20... The coolant can be discharged to the outside of the container body 10 on the side away from the lid 11. The overflow channel 20 is designed to guide the coolant when it exerts force on the moving part 111 in the cavity, thereby lowering the coolant level at the lid 11. This prevents the coolant from spraying out of the lid 11 and scalding the operator when adding coolant to the container body 10 or performing maintenance. It can effectively prevent coolant splashing, reduce the frequency of overflow from the expansion tank, and improve the safety of using the expansion tank.

[0033] In an example scheme, such as Figure 3 As shown, the lid 11 also includes a reset member 112, which is connected to the movable member 111. When the movable member 111 is subjected to a force from the coolant, the reset member 112 is compressed and stores a reset force. When the force exerted by the coolant on the movable member 111 is removed, the reset force resets the movable member 111, thereby disconnecting the connection between the cavity and the overflow channel 20.

[0034] In an example scheme, such as Figure 2 As shown, the cavity includes a first liquid storage chamber 12 and at least one second liquid storage chamber 13. The first liquid storage chamber 12 and the second liquid storage chamber 13 are connected and both are used to store coolant. The position of the first liquid storage chamber 12 is matched with the lid 11. The first liquid storage chamber 12 can be connected to the overflow channel 20 through the movement of the movable part 111. The second liquid storage chamber 13 is connected to the coolant pipe of the vehicle cooling system. The operator can open the lid 11 to add coolant to the first liquid storage chamber 12. The coolant can flow from the first liquid storage chamber 12 to the second liquid storage chamber 13. When the coolant inside the container 10 overflows, that is, when the coolant in the first liquid storage chamber 12 overflows, the coolant will exert force on the movable part 111, thereby connecting the first liquid storage chamber 12 to the overflow channel 20.

[0035] In one example scheme, combined Figure 2 and Figure 4 The vessel body 10 also includes at least one collection chamber 14, which is located on at least one side of the vessel body 10 in the length and width directions, and / or, the collection chamber 14 is located on the side of the vessel body 10 away from the lid 11 in the height direction. More specifically, the collection chamber 14 is adjacent to the second liquid storage chamber 13, and the end of the overflow channel 20 away from the lid 11 is connected to the collection chamber 14. The collection chamber 14 is used to collect and store coolant from the overflow channel 20.

[0036] When coolant overflows from the cavity into the overflow channel 20, it can enter the collection cavity 14 for storage through the overflow channel 20, so as to avoid the overflowing coolant being directly discharged to the outside of the tank 10 and contaminating other parts in the engine compartment. This improves the cleanliness of the entire expansion tank, reduces environmental pollution, avoids increasing vehicle cleaning costs, and helps improve the vehicle user experience.

[0037] In another example scenario, such as Figure 4 As shown, at least one expansion member 30 is connected to at least one side of the pot body 10 in the length and width directions, and / or, at least one expansion member 30 is connected to the side of the pot body 10 away from the lid 11 in the height direction. The expansion member 30 includes a collection cavity 14, and the end of the overflow channel 20 away from the lid 11 is connected to the collection cavity 14. The collection cavity 14 is used to store coolant from the overflow channel 20.

[0038] In this example, a guide hole is provided on the kettle body 10, and an overflow pipe is inserted through the guide hole. One end of the overflow pipe extends into the cavity of the kettle body 10 and cooperates with the movable part 111 of the kettle lid 11. The overflow pipe can communicate with the cavity through the movement of the movable part 111. The other end of the overflow pipe can communicate with the collection cavity 14 of the expansion part 30. The overflow pipe forms the aforementioned overflow channel 20. With this configuration, the existing kettle body 10 can be expanded and modified without replacing it with a new kettle body 10. Moreover, the position and size of the expansion part 30 installed on the kettle body 10 can be set according to the position of the components in the engine compartment, which has good flexibility.

[0039] For example, combined Figure 1 and Figure 4 The collection chamber 14 has vent holes 15 on its wall. The vent holes 15 are used to connect the collection chamber 14 and the outside of the pot body 10. The vent holes 15 can balance the air pressure, so that the air pressure in the overflow channel 20 and the collection chamber 14 is the same as the air pressure outside the pot body 10. It can also discharge the gas in the overflow channel 20 and the collection chamber 14. More specifically, when the high temperature and high pressure gas-liquid mixture enters the overflow channel 20 and the collection chamber 14, the gas in the gas-liquid mixture can be discharged through the vent holes 15, while the liquid is stored inside the collection chamber 14. This can achieve venting, avoid the gas being stored in the cavity and causing the pressure inside the pot body 10 to be too high, and make it easier for the coolant to enter the collection chamber 14.

[0040] For example, such as Figure 1 As shown, a drain port is provided on the wall of the collection chamber 14, which connects the collection chamber 14 to the outside of the container 10. A valve body 16 is installed at the drain port. When the liquid level in the collection chamber 14 is too high, or when the maintenance cycle is reached, the operator can open the valve body 16 to drain the liquid in the collection chamber 14 for centralized collection or treatment. In this example, a liquid level detection device is provided in the collection chamber 14. The liquid level detection device can detect the liquid level in the collection chamber 14 in real time. The liquid level detection device is configured to communicate with the vehicle's central control system. When the liquid level is detected to be too high, the vehicle's central control system can remind the vehicle user, who can then drain the coolant in the collection chamber 14 by opening the valve body 16. Understandably, to avoid contaminating the engine compartment with the drained coolant, a pipe can be connected to the drain port first, and then the coolant can be drained and collected through the pipe.

[0041] like Figure 1 As shown, when the collection chamber 14 is provided with both an air hole 15 and a discharge port and a valve body 16, and the collection chamber 14 is located on one side of the chamber in the length direction of the vessel 10, the air hole 15 is located above the discharge port. This arrangement can prevent coolant from being discharged from the vessel 10 through the air hole 15, thus preventing coolant from leaking into the engine compartment and reducing contamination of the engine compartment.

[0042] like Figure 4 As shown, when the collecting chamber 14 is located on the side of the pot body 10 away from the lid 11 in the height direction, if the space of the collecting chamber 14 in the height direction of the pot body 10 is large enough, the vent 15 can be set above the discharge port. If the space of the collecting chamber 14 in the height direction of the pot body 10 is reduced, the vent 15 can be opened only on the cavity wall of the collecting chamber 14, and the vent 15 is located on the upper part of the cavity wall of the collecting chamber 14. The vent 15 can not only balance the air pressure and exhaust the air, but also allow the coolant to be discharged from the collecting chamber 14.

[0043] In an example scheme, such as Figure 4 As shown, the overflow channel 20 includes a first guide channel 21, which is adjacent to the first liquid storage chamber 12. The first guide channel 21 extends along the height direction of the vessel body 10. One end of the first guide channel 21 can be connected to the first liquid storage chamber 12 through the movement of the movable member 111, and the other end is connected to the outside of the vessel body 10 or to the collection chamber 14.

[0044] In this example, the first guide channel 21 extends from the lid 11 to the bottom of the body 10 along the height direction of the body 10 to guide the overflowing coolant from the lid 11 to the bottom of the body 10. This arrangement increases the space of the overflow channel 20 and extends the flow path of the coolant, effectively preventing the high-temperature and high-pressure gas-liquid mixture from being sprayed out from the lid 11.

[0045] like Figure 4 As indicated by the arrow, when the coolant level in the first reservoir 12 rises to the point where it exerts a force on the movable member 111, the movable member 111 moves, causing the first reservoir 12 to connect with the first guide channel 21. The coolant can then move from the lid 11 towards the side away from the lid 11 within the first guide channel 21, thereby lowering the coolant level in the first reservoir 12.

[0046] In this example, combined Figure 2 and Figure 5 The overflow channel 20 also includes a second guide channel 22. One end of the first guide channel 21 away from the lid 11 is connected to one end of the second guide channel 22, and the other end of the second guide channel 22 is connected to the outside of the kettle body 10 or to the collection chamber 14.

[0047] For example, the first guide channel 21 and the second guide channel 22 are perpendicular to each other.

[0048] For example, the second guide channel 22 may be located at the upper part, middle part or bottom of the pot body 10, and the position of the second guide channel 22 may be set according to the length of the first guide channel 21.

[0049] Understandably, when the first guide channel 21 extends to the bottom of the vessel body 10 and the second guide channel 22 is located at the bottom of the vessel body 10, it has a better effect on the overflow collection of coolant.

[0050] Reference Figure 5 When the first guide channel 21 extends to the upper or middle part of the pot body 10, the second guide channel 22 is located at the upper or middle part of the pot body 10.

[0051] For example, the first guide channel 21 and the second guide channel 22 can be installed in the pot body 10 in the form of the aforementioned overflow pipe, or the first guide channel 21 and the second guide channel 22 can be integrally formed with the pot body 10.

[0052] In one example scheme, combined Figure 6 and Figure 7 The vessel body 10 includes a first shell 40 and a second shell 50. The first shell 40 includes a first component cavity 41 and a second component cavity 42. The second shell 50 includes a third component cavity 51 and a fourth component cavity 52. ​​When the first shell 40 and the second shell 50 are assembled and connected, the first component cavity 41 and the third component cavity 51 are assembled to form a first liquid storage cavity 12, and the second component cavity 42 and the fourth component cavity 52 are assembled to form a second liquid storage cavity 13.

[0053] For example, combined Figure 6 and Figure 7 The first housing 40 includes a first channel 43, which extends along the height direction of the pot body 10. The second housing 50 includes a second channel 53, which extends along the height direction of the pot body 10. When the first housing 40 and the second housing 50 are assembled and connected, the first channel 43 and the second channel 53 cooperate to form a first guide channel 21.

[0054] For example, such as Figure 7 As shown, the second guide channel 22 is located on the second housing 50 and is connected to the second channel 53.

[0055] For example, combined Figure 6 and Figure 7 The outer wall of the first channel 43 is connected to a first arc-shaped wall 44, which arches from one side of the first component cavity 41 toward one side of the adjacent second component cavity 42. The outer wall of the second channel 53 is connected to a second arc-shaped wall 54, which arches from one side of the third component cavity 51 toward one side of the adjacent fourth component cavity 52.

[0056] This configuration allows the volume of the first liquid storage chamber 12 to be larger than that of the adjacent second liquid storage chamber 13. This enables the first liquid storage chamber 12 to hold more coolant without causing the liquid level to rise too quickly, thus reducing the overflow frequency of the expansion tank. Furthermore, the cooperation between the first arc-shaped wall 44 and the second arc-shaped wall 54 increases the contact area between the first housing 40 and the second housing 50 when they are connected. This helps to ensure the structural strength of the first guide channel 21 and avoids the problem of poor structural stability caused by the frequent flow of high-temperature and high-pressure coolant.

[0057] For example, refer to Figure 6 and Figure 7 When the collecting chamber 14 is integrally formed with the vessel body 10, the first shell 40 and the second shell 50 are assembled to form the collecting chamber 14. When the number of collecting chambers 14 is set to two or more, the overflow channel 20 is connected to one of the collecting chambers 14, and the two or more collecting chambers 14 are connected to each other. The discharge port is opened on one of the collecting chambers 14, and the vent 15 can be opened on one of the collecting chambers 14, or the vent 15 can be opened on each collecting chamber 14. This arrangement can reduce the coolant flow rate.

[0058] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A vehicle expansion container, comprising a container body (10) and a container lid (11), characterized in that, The kettle body (10) includes a cavity and an overflow channel (20) adjacent to the cavity. The cavity is used to store coolant. The kettle lid (11) includes a movable member (111) located near the cavity. The movable member (111) is configured to move under the action of coolant in the cavity so that one end of the overflow channel (20) can communicate with the cavity. The other end of the overflow channel (20) extends away from the kettle lid (11) and can communicate with the outside of the kettle body (10). When coolant in the cavity overflows to the kettle lid (11), the movable member (111) moves under force, so that the cavity and the overflow channel (20) communicate. The coolant enters the overflow channel (20) and can flow out of the kettle body (10) through the overflow channel (20).

2. The vehicle expansion tank according to claim 1, characterized in that, At least one expansion member (30) is connected to at least one side of the pot body (10) in the length and width directions, and / or, at least one expansion member (30) is connected to the side of the pot body (10) away from the pot lid (11) in the height direction, the expansion member (30) includes a collection cavity (14), one end of the overflow channel (20) away from the pot lid (11) is connected to the collection cavity (14), the collection cavity (14) is used to store coolant from the overflow channel (20).

3. The vehicle expansion tank according to claim 1, characterized in that, The kettle body (10) further includes at least one collection chamber (14), the collection chamber (14) being located on at least one side of the cavity in the length and width directions of the kettle body (10), and / or, the collection chamber (14) being located on the side of the cavity away from the lid (11) in the height direction of the kettle body (10), one end of the overflow channel (20) away from the lid (11) communicating with the collection chamber (14), the collection chamber (14) being used to store coolant from the overflow channel (20).

4. The vehicle expansion tank according to claim 2 or 3, characterized in that, The collection chamber (14) has an air hole (15) on its wall. The air hole (15) connects the collection chamber (14) with the outside of the pot body (10). The air hole (15) is used to make the air pressure inside the collection chamber (14) the same as the air pressure outside the pot body (10), and to discharge the gas inside the collection chamber (14).

5. The vehicle expansion tank according to claim 2 or 3, characterized in that, The collection chamber (14) has a discharge port on its wall, which connects the collection chamber (14) to the outside of the pot body (10), and a valve body (16) is installed at the discharge port.

6. The vehicle expansion tank according to claim 2 or 3, characterized in that, The cavity includes a first liquid storage cavity (12) and at least one second liquid storage cavity (13). The first liquid storage cavity (12) is connected to the second liquid storage cavity (13). The position of the first liquid storage cavity (12) is matched with the lid (11) and can be connected to the overflow channel (20) through the movement of the movable part (111).

7. The vehicle expansion tank according to claim 6, characterized in that, The overflow channel (20) includes a first guide channel (21), which is adjacent to the first liquid storage chamber (12) and extends along the height direction of the vessel body (10). One end of the first guide channel (21) can be connected to the first liquid storage chamber (12) through the movement of the movable part (111), and the other end is connected to the outside of the vessel body (10) or to the collection chamber (14).

8. The vehicle expansion tank according to claim 7, characterized in that, The overflow channel (20) also includes a second guide channel (22), one end of which is connected to one end of the first guide channel (21), and the other end is connected to the outside of the pot body (10) or to the collection chamber (14).

9. The vehicle expansion tank according to claim 2 or 3, characterized in that, The collection chamber (14) is equipped with a liquid level detection device, which is used to detect the liquid level of the coolant in the collection chamber (14) in real time.

10. The vehicle expansion tank according to claim 8, characterized in that, The kettle body (10) includes a first shell (40) and a second shell (50). The first shell (40) includes a first channel (43) that extends along the height direction of the kettle body (10). The second shell (50) includes a second channel (53) that extends along the height direction of the kettle body (10). When the first shell (40) and the second shell (50) are connected, the first channel (43) and the second channel (53) cooperate to form the first guide channel (21).

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