Expansion tank

Abstract

The utility model belongs to the technical field of automobile spare parts, and discloses an expansion water tank which comprises a tank body provided with a filling end and at least two independent liquid storage cavities, the filling end is provided with at least two single-cavity filling ports, and the single-cavity filling ports are communicated with the liquid storage cavities in a one-to-one correspondence mode; and the switching base is movably installed at the filling end, a liquid inlet hole penetrating through the inside and the outside is formed in the switching base, and the liquid inlet hole can selectively communicate with any single-cavity filling port. According to the expansion water tank provided by the utility model, the cooling liquid can be independently filled into any liquid storage cavity, so that the cooling liquid capacity and temperature of different cooling loops can be adjusted, and the adjusting flexibility is higher.

Description

Technical Field

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

[0002] Expansion tanks are widely used in automotive cooling systems, where the coolant they contain dissipates heat and removes gas from heat-generating components inside the engine and battery. With the increasing number of heat-generating components requiring cooling in new energy vehicles, different components have varying requirements for coolant temperature, pressure, flow rate, and other data indicators. This necessitates the installation of multiple independent cooling circuits in automotive cooling systems, each requiring its own expansion tank to perform functions such as heat dissipation, coolant filling, circuit coolant replenishment, and coolant level display.

[0003] Currently, there are multi-chamber water tanks on the market, where each chamber is filled with coolant through the same filling port. Regarding coolant volume, due to different evaporation rates, one circuit may have too much coolant while another is underfilled. Regarding temperature, due to different cooling loads, one circuit may have a higher coolant temperature, even boiling over, while another circuit may have a lower coolant temperature. Therefore, it is difficult to adjust the coolant capacity and temperature of each chamber.

[0004] Therefore, there is an urgent need for an expansion tank to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide an expansion tank that can individually add coolant to any storage chamber, so as to adjust the coolant capacity and temperature of different cooling circuits, thus providing greater flexibility in adjustment.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An expansion tank is provided, comprising:

[0008] The housing has a filling end and at least two independent liquid storage chambers. The filling end is provided with at least two single-chamber filling ports, and the single-chamber filling ports are connected to the liquid storage chambers one by one.

[0009] A switching base is movably installed on the filling end. The switching base is provided with a liquid inlet hole that penetrates both the inside and outside. The liquid inlet hole can selectively communicate with any of the single-chamber filling ports.

[0010] As a preferred technical solution, the filling end is also provided with a multi-cavity filling port, which is simultaneously connected to at least two of the liquid storage cavities, and the liquid inlet hole can selectively connect to the multi-cavity filling port.

[0011] As a preferred technical solution, one of the filling end and the switching base is provided with an elastic positioning component, and the other is provided with multiple positioning grooves. The multiple positioning grooves are respectively provided with one-to-one correspondence between the single-cavity filling port or the multi-cavity filling port. When the elastic positioning component is inserted into any of the positioning grooves, the liquid inlet hole is connected to the corresponding single-cavity filling port or multi-cavity filling port.

[0012] As a preferred technical solution, the elastic positioning component includes an elastic element and a limiting pin. One end of the elastic element is connected to the filling end or the switching base, and the other end of the elastic element is connected to the limiting pin. The elastic element has a tendency to drive the limiting pin to extend and insert into the positioning groove.

[0013] As a preferred technical solution, the end of the limiting pin opposite to the elastic element is provided with an insertion part, the insertion part is used to insert into the positioning groove, and at least one of the insertion part and the positioning groove has an unlocking avoidance surface. When the liquid inlet hole is disengaged from the single-cavity filling port or the multi-cavity filling port, the positioning groove can push the limiting pin to retract via the unlocking avoidance surface.

[0014] As a preferred technical solution, a switching sealing ring is provided at the liquid inlet, and the switching sealing ring (40) is used to seal the gap between the switching base and the filling end.

[0015] As a preferred technical solution, the switching base is rotatably connected to the filling end, and at least two of the single-cavity filling ports are distributed at intervals around the rotation axis of the switching base.

[0016] As a preferred technical solution, the expansion tank further includes a fixing screw, the filling end is connected to the switching base through the fixing screw, and the central axis of the fixing screw is coaxial with the rotation axis of the switching base.

[0017] As a preferred technical solution, the filling end includes a mounting ring extending circumferentially therearound, the switching base is correspondingly provided with a sealing groove extending circumferentially therearound, the mounting ring is inserted into the sealing groove, and the cavity expansion tank further includes:

[0018] A sealing ring is disposed on the inner side of the mounting ring, and the sealing ring is used to seal the gap between the mounting ring and the sealing groove.

[0019] As a preferred technical solution, the switching base is connected to a face cover, which is used to close the outer end of the switching base.

[0020] The beneficial effects of this utility model are:

[0021] The expansion tank provided by this utility model has at least two independent liquid storage chambers in its body. The tank body also has a filling end, with a single-chamber filling port corresponding to each liquid storage chamber. A switching base is movably installed on the filling end. As the switching base moves, its inlet hole can selectively connect to any single-chamber filling port, while the other single-chamber filling ports are closed by the switching base. Through the single-chamber filling port connected by the inlet hole, coolant can be injected into the corresponding liquid storage chamber independently without affecting the coolant in other liquid storage chambers. In summary, the expansion tank provided by this utility model can independently add coolant to any liquid storage chamber, thereby adjusting the coolant capacity and temperature of different cooling circuits, providing greater flexibility in adjustment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the expansion tank provided by this utility model;

[0023] Figure 2 This is an exploded structural diagram of the expansion tank provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the expansion tank when it is detached from the switching base provided by this utility model;

[0025] Figure 4 This is a partial structural cross-sectional view of the expansion tank provided by this utility model;

[0026] Figure 5 This is a schematic diagram of the switching base provided by this utility model;

[0027] Figure 6 This is a schematic diagram showing the state when the liquid inlet is connected to a single-chamber filling port provided by this utility model;

[0028] Figure 7 This is a schematic diagram showing the state when the liquid inlet provided by this utility model is connected to another single-chamber filling port;

[0029] Figure 8 This is a schematic diagram showing the state when the liquid inlet hole and the multi-cavity filling port provided by this utility model are connected.

[0030] In the picture:

[0031] 100. Box body; 110. Liquid storage chamber;

[0032] 10. Filling end; 11. Single-cavity filling port; 12. Multi-cavity filling port; 13. Positioning groove; 14. Threaded seat; 15. Mounting ring;

[0033] 20. Switching base; 21. Liquid inlet; 22. Installing settling tank; 23. Installing through hole; 24. Sealing groove;

[0034] 30. Flexible positioning component; 31. Flexible element; 32. Limit pin;

[0035] 40. Replace the sealing ring; 50. Fixing screw; 60. Sealing ring; 70. Face cover; 80. Sealing gasket. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] like Figures 1-8As shown, this embodiment provides an expansion tank for storing coolant. The expansion tank includes a tank body 100 and a switching base 20. The tank body 100 has a filling end 10 and at least two independent liquid storage chambers 110. The filling end 10 is provided with at least two single-chamber filling ports 11, which are connected to the liquid storage chambers 110 in a one-to-one correspondence. The switching base 20 is used to open and close the single-chamber filling ports 11.

[0041] Furthermore, such as Figures 1-8 As shown, the switching base 20 is movably installed on the filling end 10. The switching base 20 is provided with a liquid inlet hole 21 that penetrates the inside and outside. As the switching base 20 moves relative to the filling end 10, the liquid inlet hole 21 can selectively communicate with any single-chamber filling port 11 and close the other single-chamber filling ports 11.

[0042] Specifically, the expansion tank 100 provided in this embodiment has at least two independent liquid storage chambers 110. The tank 100 also has a filling end 10, which has a single-chamber filling port 11 corresponding to each liquid storage chamber 110. A switching base 20 is movably installed on the filling end 10. As the switching base 20 moves, its inlet hole 21 can selectively connect to any single-chamber filling port 11, while the other single-chamber filling ports 11 are closed by the switching base 20. Coolant can be injected into the corresponding liquid storage chamber 110 individually through the single-chamber filling port 11 connected by the inlet hole 21 without affecting the coolant in other liquid storage chambers 110. In summary, the expansion tank can individually fill any liquid storage chamber 110 to adjust the coolant capacity and temperature of different cooling circuits, providing greater adjustment flexibility and more convenient coolant filling. It eliminates the need for a separate expansion tank for each cooling circuit, reducing costs.

[0043] For example, such as Figure 3 As shown, the filling end 10 is also provided with a multi-cavity filling port 12, which is simultaneously connected to at least two liquid storage chambers 110. The liquid inlet 21 can selectively connect to the multi-cavity filling port 12. Specifically, when the user needs to add coolant to two or more liquid storage chambers 110 at the same time, the switching base 20 can be moved to the position where the liquid inlet 21 connects to the multi-cavity filling port 12. Through the multi-cavity filling port 12, the user can inject coolant into two or more liquid storage chambers 110 at the same time, improving the filling efficiency.

[0044] In this embodiment, as Figures 3-8 As shown, the housing 100 has two independent liquid storage chambers 110. The filling end 10 is provided with two single-chamber filling ports 11 and one multi-chamber filling port 12. Each of the two single-chamber filling ports 11 is connected to one liquid storage chamber 110, and the multi-chamber filling port 12 is connected to both liquid storage chambers 110 at the same time. The two single-chamber filling ports 11 and the multi-chamber filling port 12 are arranged at intervals.

[0045] For example, such as Figures 1-8 As shown, the switching base 20 has a cylindrical shape and is rotatably connected to the filling end 10. At least two single-cavity filling ports 11 are spaced apart around the rotation axis of the switching base 20. The user can selectively open any single-cavity filling port 11 by rotating the switching base 20. Specifically, taking this embodiment as an example, the two single-cavity filling ports 11 and the multi-cavity filling port 12 are spaced apart around the rotation axis of the switching base 20. The two single-cavity filling ports 11 are located on the left and right sides of the rotation axis of the switching base 20, respectively, while the multi-cavity filling port 12 is located between the two single-cavity filling ports 11. The user can switch between opening a single-cavity filling port 11 or a multi-cavity filling port 12 by turning the switching base 20 by a certain angle, which is convenient to operate.

[0046] For example, such as Figures 2-8 As shown, the expansion tank also includes a fixing screw 50, a threaded seat 14 on the filling end 10 with a threaded hole, and a mounting through hole 23 on the switching base 20. The fixing screw 50 passes through the mounting through hole 23 and is threaded into the threaded hole of the threaded seat 14. The central axis of the fixing screw 50 is coaxial with the rotation axis of the switching base 20. Specifically, the fixing screw 50 confines the switching base 20 to the filling end 10, restricting the degree of freedom of the switching base 20 in both the horizontal and vertical directions. However, the fixing screw 50 does not completely lock the switching base 20, meaning that the switching base 20 still has a degree of rotational freedom, allowing the user to rotate the switching base 20.

[0047] Of course, in other embodiments, the switching base 20 can also be configured as a sliding cover, a lifting cover or other movable structure, which can also realize the function of selectively opening the single-cavity filling port 11 and the multi-cavity filling port 12.

[0048] For example, such as Figure 2 , Figure 3 , Figures 6-8 As shown, one of the filling end 10 and the switching base 20 is provided with an elastic positioning component 30, and the other is provided with multiple positioning grooves 13. The multiple positioning grooves 13 are respectively provided with a single-cavity filling port 11 or a multi-cavity filling port 12. When the elastic positioning component 30 is inserted into any positioning groove 13, the liquid inlet hole 21 is connected to the corresponding single-cavity filling port 11 or multi-cavity filling port 12, thereby locking the opening state of the single-cavity filling port 11 or multi-cavity filling port 12, preventing the switching base 20 from rotating or moving, improving stability, and making it easier for users to identify the rotation position of the switching base 20, indicating to the user that the liquid inlet hole 21 is aligned with the single-cavity filling port 11 or multi-cavity filling port 12, making it more convenient to use.

[0049] For example, such as Figure 2 , Figure 3 , Figures 6-8As shown, the elastic positioning assembly 30 includes an elastic element 31 and a limiting pin 32. One end of the elastic element 31 is connected to the filling end 10 or the switching base 20, and the other end of the elastic element 31 is connected to the limiting pin 32. The elastic element 31 has a tendency to drive the limiting pin 32 to extend and insert into the positioning groove 13. When the elastic positioning assembly 30 is aligned with any positioning groove 13, the elastic element 31 drives the limiting pin 32 to spring into the positioning groove 13. The limiting pin 32 collidees with the bottom of the positioning groove 13, making a sound, which audibly prompts the user that the liquid inlet 21 is aligned with the single-chamber filling port 11 or the multi-chamber filling port 12, further improving the ease of use.

[0050] In this embodiment, as Figure 2 , Figure 3 , Figures 6-8 As shown, the elastic positioning component 30 is mounted on the switching base 20, and the filling end 10 is provided with three positioning grooves 13, corresponding to two single-cavity filling ports 11 and a multi-cavity filling port 12, respectively. The elastic element 31 is a compression spring, and the switching base 20 is provided with a mounting clearance groove. One end of the compression spring is connected to the bottom wall of the mounting clearance groove, and the other end is connected to a limiting pin 32. Under the drive of the compression spring, the limiting pin 32 always tends to extend outward to insert into the positioning groove 13. In some embodiments, the elastic element 31 may also be other types of elastic elements such as a tension spring.

[0051] For example, the end of the limiting pin 32 facing away from the elastic member 31 is provided with a plug-in portion (not shown in the figure). The plug-in portion is used to insert into the positioning groove 13. At least one of the plug-in portion and the positioning groove 13 has an unlocking relief surface (not shown in the figure). When the liquid inlet 21 disengages from the single-chamber filling port 11 or the multi-chamber filling port 12, the positioning groove 13 can push the limiting pin 32 back through the unlocking relief surface. When the user rotates the switching base 20 to switch a single-chamber filling port 11 or the multi-chamber filling port 12 to the closed state, the setting of the unlocking relief surface can convert the lateral thrust into the axial force compressing the elastic member 31, so that the limiting pin 32 can retract and disengage from the positioning groove 13, thereby making the rotation of the state switching smoother. Specifically, the plug-in portion can be set as a hemispherical head or a conical structure, and the sidewall of the positioning groove 13 can be set as a concave arc surface or a slope.

[0052] For example, such as Figure 4 As shown, at the end of the liquid inlet 21 near the filling end 10, the switching base 20 forms an installation groove 22. The expansion tank also includes a switching sealing ring 40, which is embedded in the installation groove 22. The liquid inlet 21 is connected to the single-chamber filling port 11 or the multi-chamber filling port 12 through the clearance hole of the switching sealing ring 40. The switching sealing ring 40 is used to seal the gap between the bottom wall of the installation groove 22 and the filling end 10, thereby preventing coolant leakage or residue between the switching base 20 and the filling end 10.

[0053] For example, such as Figures 2-4 As shown, the filling end 10 includes a mounting ring 15 extending circumferentially around it, and the lower end of the switching base 20 is correspondingly provided with a sealing groove 24 extending circumferentially around it. The mounting ring 15 is inserted into the sealing groove 24, and there is a sliding fit between the mounting ring 15 and the sealing groove 24, which provides a guiding effect for the rotation of the switching base 20. Furthermore, the cavity expansion tank also includes a sealing ring 60, which is located inside the mounting ring 15. The sealing ring 60 is used to seal the gap between the mounting ring 15 and the sealing groove 24, thereby preventing the coolant in the liquid storage chamber 110 from leaking or evaporating from the gap between the filling end 10 and the switching base 20, and also preventing external dust or impurities from entering the liquid storage chamber 110, thus improving sealing performance and reliability.

[0054] For example, the sealing ring 60 is specifically a V-shaped sealing ring, which has high sealing reliability, long service life, and convenient installation. It also has the advantages of strong applicability and is suitable for low-temperature working environments.

[0055] For example, such as Figures 1-4 As shown, the expansion tank also includes a cover 70. The outer periphery of the switching base 20 is provided with external threads, and the inner wall of the cover 70 is provided with internal threads. The cover 70 is threaded to the outer end of the switching base 20. The cover 70 is used to close and cover the upper port of the switching base 20.

[0056] For example, such as Figures 1-4 As shown, the expansion tank also includes a sealing gasket 80, which is located between the outer end of the switching base 20 and the inner top wall of the face cover 70. The sealing gasket 80 is used to seal the gap between the inner top wall of the face cover 70 and the switching base 20 to prevent the coolant in the liquid storage chamber 110 from leaking out from the gap between the face cover 70 and the switching base 20. It can also prevent external dust or impurities from entering, thereby improving sealing and reliability.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An expansion tank, characterized in that, include: The housing (100) has a filling end (10) and at least two independent liquid storage chambers (110). The filling end (10) is provided with at least two single-chamber filling ports (11), and the single-chamber filling ports (11) are connected to the liquid storage chambers (110) one by one. A switching base (20) is movably installed on the filling end (10). The switching base (20) is provided with a liquid inlet hole (21) that penetrates inside and outside. The liquid inlet hole (21) can selectively communicate with any of the single-chamber filling ports (11).

2. The expansion tank according to claim 1, characterized in that, The filling end (10) is also provided with a multi-cavity filling port (12), which is simultaneously connected to at least two of the liquid storage chambers (110), and the liquid inlet (21) can selectively connect to the multi-cavity filling port (12).

3. The expansion tank according to claim 2, characterized in that, One of the filling end (10) and the switching base (20) is provided with an elastic positioning component (30), and the other is provided with a plurality of positioning grooves (13). The plurality of positioning grooves (13) are respectively provided with one-to-one correspondence between the single-cavity filling port (11) or the multi-cavity filling port (12). When the elastic positioning component (30) is inserted into any of the positioning grooves (13), the liquid inlet hole (21) is connected to the corresponding single-cavity filling port (11) or multi-cavity filling port (12).

4. The expansion tank according to claim 3, characterized in that, The elastic positioning component (30) includes an elastic element (31) and a limiting pin (32). One end of the elastic element (31) is connected to the filling end (10) or the switching base (20), and the other end of the elastic element (31) is connected to the limiting pin (32). The elastic element (31) has a tendency to drive the limiting pin (32) to extend and insert into the positioning groove (13).

5. The expansion tank according to claim 4, characterized in that, The limiting pin (32) has a plug-in portion at one end away from the elastic member (31). The plug-in portion is used to insert into the positioning groove (13). At least one of the plug-in portion and the positioning groove (13) has an unlocking clearance surface. When the liquid inlet (21) is disengaged from the single-cavity filling port (11) or the multi-cavity filling port (12), the positioning groove (13) can push the limiting pin (32) to retract via the unlocking clearance surface.

6. The expansion tank according to any one of claims 1-5, characterized in that, A switching sealing ring (40) is provided at the liquid inlet (21), and the switching sealing ring (40) is used to seal the gap between the switching base (20) and the filling end (10).

7. The expansion tank according to any one of claims 1-5, characterized in that, The switching base (20) is rotatably connected to the filling end (10), and at least two single-cavity filling ports (11) are distributed at intervals around the rotation axis of the switching base (20).

8. The expansion tank according to claim 7, characterized in that, The expansion tank also includes a fixing screw (50), the filling end (10) is connected to the switching base (20) by the fixing screw (50), and the central axis of the fixing screw (50) is coaxial with the rotation axis of the switching base (20).

9. The expansion tank according to any one of claims 1-5, characterized in that, The filling end (10) includes a mounting ring (15) extending circumferentially therearound, and the switching base (20) is provided with a sealing groove (24) extending circumferentially therearound, and the mounting ring (15) is inserted into the sealing groove (24).

10. The expansion tank according to any one of claims 1-5, characterized in that, The switching base (20) is connected to a face cover (70), which is used to close the outer end of the switching base (20).

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