Plastic liquid storage tank and automobile thermal management system

Abstract

This utility model relates to the field of liquid storage tank technology, and more particularly to a plastic liquid storage tank and an automotive thermal management system. The plastic liquid storage tank includes a first upper shell, a first lower shell, a second upper shell, and a second lower shell. The first upper shell and the first lower shell are both plastic parts, and are rotary-welded together to form a receiving chamber. The first lower shell has a liquid inlet and a liquid outlet, both of which communicate with the receiving chamber. The second upper shell and the second lower shell are also plastic parts, and are rotary-welded together. The second upper shell is injection-molded onto the outer periphery of the first upper shell, and the second lower shell is injection-molded onto the outer periphery of the first lower shell. This plastic liquid storage tank has a light weight, achieving lightweight design goals, reducing manufacturing costs, and improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid storage tank technology, and in particular to a plastic liquid storage tank and an automotive thermal management system. Background Technology

[0002] As a key component for storing refrigerants and liquid media, the structural design and material selection of liquid receivers directly affect the stability, cost, and service life of automotive thermal management systems. Traditional liquid receivers are mostly made of metals such as aluminum alloys, which meet storage requirements due to their high strength and pressure resistance. However, with the increasing demands for lightweight, low-cost, and corrosion-resistant properties in industrial production, the limitations of metal materials in terms of material cost and weight are becoming increasingly apparent.

[0003] Existing metal liquid storage tanks are relatively heavy. In some applications where lightweight equipment is a specific requirement, their bulky nature limits the overall performance and portability of the equipment, hindering lightweight design. Furthermore, metal liquid storage tanks are expensive to produce and require multiple complex machining processes, resulting in cumbersome manufacturing and low efficiency.

[0004] Therefore, there is an urgent need to design a plastic liquid storage tank and an automotive thermal management system to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to propose a plastic liquid storage tank and an automotive thermal management system that can reduce weight and achieve lightweight design; reduce manufacturing costs and improve processing efficiency.

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

[0007] On the one hand, this utility model provides a plastic liquid storage tank, comprising:

[0008] A first upper shell and a first lower shell, both of which are plastic parts, are rotary welded together to form an accommodating cavity;

[0009] The second upper shell and the second lower shell are both plastic parts, and the second upper shell and the second lower shell are rotary welded together. The second upper shell is injection molded on the outer periphery of the first upper shell, and the second lower shell is injection molded on the outer periphery of the first lower shell. The second lower shell is connected to the first lower shell and forms a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the accommodating chamber.

[0010] As an optional technical solution for a plastic liquid storage tank, the thickness of the first upper shell and the thickness of the first lower shell are both set to H1, and the thickness of the second upper shell and the thickness of the second lower shell are both set to H2, where H1≤3.0mm and H2≤3.0mm.

[0011] As an alternative technical solution for plastic liquid storage tanks, H1 = H2.

[0012] As an optional technical solution for a plastic liquid storage tank, the first upper shell is provided with a first protrusion, the first lower shell is provided with a first groove, and the first protrusion is rotatably welded into the first groove; the second upper shell is provided with a second protrusion, the second lower shell is provided with a second groove, and the second protrusion is rotatably welded into the second groove.

[0013] As an optional technical solution for a plastic liquid storage tank, the plastic liquid storage tank further includes a liquid inlet pipe, one end of which is connected to the liquid inlet, and the other end of which is placed in the accommodating cavity and extends to the top area of ​​the accommodating cavity.

[0014] As an optional technical solution for a plastic liquid storage tank, the plastic liquid storage tank further includes a first filter layer, a second filter layer, and a desiccant. The first filter layer and the second filter layer are both connected to the inner wall of the first upper shell, and the first filter layer is located above the second filter layer and together with the second filter layer to form a storage space for accommodating the desiccant.

[0015] As an optional technical solution for plastic liquid storage tanks, along the height direction of the plastic liquid storage tank, the height of the end of the inlet pipe away from the inlet is higher than the height of the first filter layer.

[0016] As an optional technical solution for a plastic liquid storage tank, the plastic liquid storage tank further includes two sealing connectors, one of which is embedded in the liquid inlet and the other of which is embedded in the liquid outlet. Each sealing connector is provided with a through hole, one end of which communicates with the accommodating chamber and the other end of which is used to communicate with the circulation pipeline.

[0017] As an optional technical solution for a plastic liquid storage tank, the sealing connector includes a connector and a sealing body. The sealing body is disposed in the radial direction of the connector and is interference-fitted with the inner wall of the liquid inlet or the inner wall of the liquid outlet. The through hole extends through the axial direction of the connector.

[0018] On the other hand, this utility model provides an automotive thermal management system, which includes a compressor, a condenser, an expansion valve, an evaporator, a circulation pipeline, and a plastic liquid storage tank as described in any of the above optional technical solutions. The outlet of the compressor is connected to the inlet of the condenser via the circulation pipeline; the outlet of the condenser is connected to the inlet of the plastic liquid storage tank via the circulation pipeline; the outlet of the plastic liquid storage tank is connected to the inlet of the expansion valve via the circulation pipeline; the outlet of the expansion valve is connected to the inlet of the evaporator via the circulation pipeline; and the outlet of the evaporator is connected to the inlet of the compressor via the circulation pipeline, thereby forming a refrigerant circulation loop.

[0019] The beneficial effects of this utility model include at least the following:

[0020] This utility model provides a plastic liquid storage tank, which includes a first upper shell, a first lower shell, a second upper shell, and a second lower shell. The first upper shell and the first lower shell are both plastic parts, and are rotary-welded together to form a receiving chamber. The second upper shell and the second lower shell are also plastic parts, and are rotary-welded together. The second upper shell is injection-molded onto the outer periphery of the first upper shell, and the second lower shell is injection-molded onto the outer periphery of the first lower shell. The second lower shell communicates with the first lower shell to form an inlet and an outlet, both of which are connected to the receiving chamber.

[0021] In this invention, the first upper shell, first lower shell, second upper shell, and second lower shell are all made of plastic, replacing the metal material used in traditional technology. This reduces weight and achieves a lightweight design. Furthermore, the cost of plastic is significantly lower than that of metal, thus reducing manufacturing costs. In addition, the first upper shell and first lower shell, as well as the second upper shell and second lower shell, are connected by rotary welding. Rotary welding uses frictional heat to melt and bond the plastic contact surfaces, resulting in a tight fit. Compared to traditional metal welding (such as argon arc welding), no additional sealing material is required, and the weld joint is free of defects such as pores and cracks, effectively preventing refrigerant leakage. Simultaneously, the second upper shell is injection molded onto the outer periphery of the first upper shell, and the second lower shell is injection molded onto the outer periphery of the first lower shell. This creates a double-layer structure for the plastic storage tank, increasing its strength to meet the high-pressure requirements of refrigerant storage. The injection molding process replaces the complex machining steps of traditional technology, improving processing efficiency and reducing manufacturing costs.

[0022] This utility model also provides an automotive thermal management system that can reduce the weight of the automotive thermal management system, achieve lightweighting, reduce the energy consumption of the vehicle, and reduce manufacturing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the plastic liquid storage tank provided in this embodiment of the utility model;

[0025] Figure 2 This is a bottom view of the plastic liquid storage tank provided in this embodiment of the utility model;

[0026] Figure 3 yes Figure 2 A sectional view along section AA;

[0027] Figure 4 This is a structural schematic diagram of a sealing connector provided in an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of another sealing connector provided in an embodiment of the present invention.

[0029] Figure Labels

[0030] 10. First upper shell; 11. First protrusion;

[0031] 20. First lower shell; 21. First groove; 22. Liquid inlet; 23. Liquid outlet;

[0032] 30. Second upper shell; 31. Second protrusion;

[0033] 40. Second lower housing; 41. Second groove;

[0034] 50. Containing chamber; 51. Liquid inlet pipe; 52. First filter layer; 53. Second filter layer; 54. Desiccant;

[0035] 60. Sealing connector; 61. Connector; 611. Through hole; 62. Sealing body; 63. Sealing gasket; 64. Positioning ring. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "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 of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] 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.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] This embodiment provides a plastic liquid storage tank that can reduce weight, achieve the purpose of lightweight design, reduce manufacturing costs, and improve processing efficiency.

[0044] like Figures 1-3 As shown, the plastic storage tank mainly includes a first upper shell 10, a first lower shell 20, a second upper shell 30, and a second lower shell 40. The first upper shell 10 and the first lower shell 20 are both plastic parts, and are rotary-welded together to form a receiving chamber 50. The second upper shell 30 and the second lower shell 40 are also plastic parts, and are rotary-welded together. The second upper shell 30 is injection-molded onto the outer periphery of the first upper shell 10, and the second lower shell 40 is injection-molded onto the outer periphery of the first lower shell 20. The second lower shell 40 communicates with the first lower shell 20 to form an inlet 22 and an outlet 23, both of which are connected to the receiving chamber 50.

[0045] Based on the above design, in this embodiment, the first upper shell 10, the first lower shell 20, the second upper shell 30, and the second lower shell 40 are all made of plastic, replacing the metal material used in traditional technology. This reduces weight and achieves the goal of lightweight design. Furthermore, the cost of plastic is significantly lower than that of metal, thus reducing manufacturing costs. In addition, the first upper shell 10 and the first lower shell 20, as well as the second upper shell 30 and the second lower shell 40, are connected by rotary welding. Rotary welding uses frictional heat to melt and bond the plastic contact surfaces, resulting in a tight fit. Compared to traditional metal welding (such as argon arc welding), no additional sealing material is required, and the weld joint is free of defects such as pores and cracks, effectively preventing refrigerant leakage. Simultaneously, the second upper shell 30 is injection molded onto the outer periphery of the first upper shell 10, and the second lower shell 40 is injection molded onto the outer periphery of the first lower shell 20, creating a double-layer structure for the plastic storage tank. This increases its strength to meet the high-pressure requirements of refrigerant storage. Injection molding replaces the complex machining processes of traditional technologies, improving processing efficiency and reducing manufacturing costs.

[0046] In this embodiment, the first upper shell 10, the first lower shell 20, the second upper shell 30, and the second lower shell 40 are all manufactured by injection molding. The second upper shell 30 is formed on the outer periphery of the first upper shell 10 by secondary injection molding, and the second lower shell 40 is formed on the outer periphery of the first lower shell 20 by secondary injection molding.

[0047] It should be noted that the injection molding process and the rotary welding (spin welding) process in this embodiment are both conventional plastic product processing methods, and the specific process parameters and processing steps will not be described in detail in this embodiment.

[0048] Optionally, the materials of the first upper shell 10, the first lower shell 20, the second upper shell 30, and the second lower shell 40 in this embodiment can all be processed and prepared using a composite of nylon and glass fiber. For example, they can be injection molded from high-strength plastics such as AP66+GF30, AP66+GF35, AP66+GF40, AP66+GF45, and AP66+GF50.

[0049] like Figure 3 As shown, in this embodiment, the thickness of the first upper shell 10 and the thickness of the first lower shell 20 are both set to H1, and the thickness of the second upper shell 30 and the thickness of the second lower shell 40 are both set to H2, where H1≤3.0mm and H2≤3.0mm.

[0050] Specifically, when both H1 and H2 do not exceed 3.0 mm, according to plastic molding theory and experimental verification, the shrinkage rate of plastic products with a wall thickness of 3 mm is only 0.3%, while the shrinkage rate of 3.5 mm wall thickness rises to 1.2%, which can easily lead to misalignment of the melt surface. Therefore, controlling H1 and H2 to a range not exceeding 3.0 mm can not only minimize the shrinkage rate of the plastic storage tank during injection molding, but also ensure a certain compressive strength.

[0051] Preferably, in this embodiment, H1 = H2. The equal thickness design of the inner and outer layers ensures uniform radial stress distribution in the plastic storage tank under high pressure. Finite element analysis (FEA) shows that the pressure (yield pressure) of the maximum stress concentration area in the 6mm total thickness double-layer structure at 11MPa is 94MPa, higher than the 71MPa of the maximum stress concentration area in a single-layer 6mm plastic storage tank, thus reducing the risk of localized rupture. Furthermore, the H1 = H2 design simplifies the design of the plastic storage tank, facilitates mold making and manufacturing, improves production efficiency, and reduces manufacturing costs.

[0052] Preferably, in this embodiment, H1 = H2 = 3.0 mm.

[0053] The plastic liquid storage tank in this embodiment adopts the above-mentioned double-layer structure design and can withstand pressures of over 11 MPa. Furthermore, the volume of the plastic liquid storage tank can be set to over 100 ml, and this plastic liquid storage tank is suitable for various types of refrigerants such as R290, 1234yf, and 134a.

[0054] like Figure 3 As shown, in this embodiment, the first upper shell 10 is provided with a first protrusion 11, the first lower shell 20 is provided with a first groove 21, and the first protrusion 11 is rotatably welded to the first groove 21; the second upper shell 30 is provided with a second protrusion 31, the second lower shell 40 is provided with a second groove 41, and the second protrusion 31 is rotatably welded to the second groove 41.

[0055] The engagement of the first protrusion 11 and the first groove 21, as well as the engagement of the second protrusion 31 and the second groove 41, provides a more stable connection foundation for rotary welding, increases the melting area and friction, makes the weld stronger, improves the overall structural strength of the plastic storage tank, and ensures stable operation under high pressure and vibration conditions. Simultaneously, during assembly, the engagement of the first protrusion 11 and the first groove 21, and the engagement of the second protrusion 31 and the second groove 41, enables precise positioning, reduces assembly errors and time, improves assembly efficiency and quality, and lowers production costs.

[0056] For example, the welding end of the first upper housing 10 is provided with a trapezoidal first protrusion with a height of 2 mm and an angle of 15°, and the first lower housing 20 is provided with a corresponding trapezoidal first groove with a depth of 2.2 mm. The fitting gap between the first protrusion 11 and the first groove 21 is 0.1 mm. During rotary welding (i.e., spin welding), the rotation speed is set to 2000 rpm, the welding pressure is 5 MPa, and the duration is 8 s, so that the contact surfaces of the first protrusion 11 and the first groove 21 are completely fused together. The second protrusion 31 of the second upper housing 30 and the second groove 41 of the second lower housing 40 adopt the same design, but the height of the second protrusion 31 is 1.5 mm to avoid mold interference during secondary injection molding.

[0057] like Figure 3 As shown, the plastic storage tank also includes an inlet pipe 51. One end of the inlet pipe 51 is connected to the inlet port 22, and the other end of the inlet pipe 51 is placed inside the receiving chamber 50 and extends to the top area of ​​the receiving chamber 50. This allows the refrigerant to flow smoothly into the top of the receiving chamber 50 along the inlet pipe 51, avoiding direct impact of the refrigerant on the bottom or wall of the tank, reducing splashing and eddies, lowering the impact force of the refrigerant on the internal structure of the tank, and extending the service life of the plastic storage tank.

[0058] Furthermore, the plastic storage tank also includes a first filter layer 52, a second filter layer 53, and a desiccant 54. Both the first filter layer 52 and the second filter layer 53 are connected to the inner wall of the first upper housing 10, and the first filter layer 52 is located above the second filter layer 53, forming a space for accommodating the desiccant 54. The refrigerant can flow through the inlet pipe 51 to the top of the accommodating chamber 50, then pass through the first filter layer 52 into the accommodating space to dry and absorb moisture from the refrigerant with the desiccant 54, and then flow out through the second filter layer 53.

[0059] The design of the first filter layer 52 and the second filter layer 53 effectively filters impurity particles in the refrigerant, ensuring the purity of the refrigerant entering the circulation pipeline, preventing impurities from clogging downstream components (such as expansion valves) or damaging component surfaces, and extending the service life of the automotive thermal management system. The desiccant 54 adsorbs moisture in the refrigerant, preventing moisture from corroding and damaging the plastic reservoir and system components, ensuring system performance and reliability, especially for the refrigerant system, avoiding problems such as ice blockage caused by moisture.

[0060] Along the height of the plastic liquid storage tank, the end of the inlet pipe 51 furthest from the inlet port 22 is higher than the height of the first filter layer 52. This ensures that the outlet of the inlet pipe 51 is higher than the first filter layer 52, allowing the refrigerant to pass through the first filter layer 52 first, ensuring sufficient contact and improving filtration efficiency. This guarantees that impurities are effectively intercepted, maintaining refrigerant purity. Simultaneously, it prevents the refrigerant from directly impacting the first filter layer 52, extending its service life and reducing maintenance frequency and costs.

[0061] For example, the outlet height of the inlet pipe 51 is 3 mm higher than the size of the first filter layer 52, ensuring that the refrigerant flows through the top space of the accommodating chamber 50 before permeating downwards.

[0062] like Figure 4 As shown, the plastic storage tank also includes two sealing connectors 60, one of which is embedded in the inlet 22 and the other is embedded in the outlet 23. Each sealing connector 60 is provided with a through hole 611. One end of the through hole 611 is connected to the accommodating chamber 50, and the other end of the through hole 611 is used to connect to the circulation pipeline.

[0063] Specifically, the sealing connector 60 includes a connector 61 and a sealing body 62. The sealing body 62 is disposed in the radial direction of the connector 61 and is interference-fitted with the inner wall of the inlet 22 or the inner wall of the outlet 23. The through hole 611 extends through the axial direction of the connector 61.

[0064] The sealing connector 60 consists of a connector 61 made of plastic or metal and a sealing body 62 made of ethylene propylene diene monomer (EPDM) rubber. The connector 61 is cylindrical, with an axial through-hole 611 of 6mm diameter. The inner surface of the through-hole 611 is threaded (M6×0.5) to connect to the circulation pipeline, allowing refrigerant to flow smoothly through the sealing connector 60, reducing flow resistance and pressure loss, and ensuring refrigerant circulation efficiency. The sealing body 62 is an O-ring structure, embedded in the radial groove of the connector 61. The groove depth is 1.5mm, and the O-ring cross-sectional diameter is 2mm. After installation, it forms a radial compression seal with the inner wall of the inlet 22 or outlet 23, generating uniform sealing pressure, effectively preventing refrigerant leakage, adapting to temperature changes and mechanical vibration, and improving the sealing reliability and stability of the connection.

[0065] In some alternative implementations, such as Figure 5 As shown, the sealing connector 60 can also be configured as an end-face seal. The end-face seal includes a gasket 63, a locating ring 64, and connecting bolts. Specifically, the gasket 63 is a circular plate, installed on the end face of the inlet 22 or outlet 23, and in direct contact with the flange face of the circulation pipeline. The locating ring 64 is located around the gasket 63 and is used to fix the position of the gasket 63. The connecting bolts pass through the flange of the circulation pipeline and the plastic storage tank to press the gasket 63 tightly against the end face of the inlet 22 and the end face of the outlet 23.

[0066] This embodiment also provides an automotive thermal management system, which includes a compressor, a condenser, an expansion valve, an evaporator, a circulation pipeline, and the aforementioned plastic reservoir. The compressor outlet is connected to the condenser inlet via the circulation pipeline; the condenser outlet is connected to the plastic reservoir inlet 22 via the circulation pipeline; the plastic reservoir outlet 23 is connected to the expansion valve inlet via the circulation pipeline; the expansion valve outlet is connected to the evaporator inlet via the circulation pipeline; and the evaporator outlet is connected to the compressor inlet via the circulation pipeline, thus forming a refrigerant circulation loop.

[0067] The inlet 22 and outlet 23 of the plastic storage tank are respectively sealed to the circulation pipeline via sealing connectors 60, and the joints of the circulation pipeline are reinforced with metal clamps. The first filter layer 52, desiccant 54 and the second filter layer 53 in the accommodating chamber 50 filter and dry the flowing refrigerant.

[0068] Because the automotive thermal management system uses the aforementioned plastic reservoir, it can reduce the weight of the system, achieve lightweighting, reduce energy consumption, and lower manufacturing costs.

[0069] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0070] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A plastic liquid storage tank, characterized in that, include: The first upper shell (10) and the first lower shell (20) are both plastic parts. The first upper shell (10) and the first lower shell (20) are rotated and welded to form an accommodating chamber (50). The second upper shell (30) and the second lower shell (40) are both plastic parts. The second upper shell (30) and the second lower shell (40) are rotated and welded together. The second upper shell (30) is injection molded on the outer periphery of the first upper shell (10), and the second lower shell (40) is injection molded on the outer periphery of the first lower shell (20). The second lower shell (40) is connected to the first lower shell (20) to form a liquid inlet (22) and a liquid outlet (23). The liquid inlet (22) and the liquid outlet (23) are both connected to the accommodating chamber (50).

2. The plastic liquid storage tank according to claim 1, characterized in that, The thickness of the first upper shell (10) and the thickness of the first lower shell (20) are both set to H1, and the thickness of the second upper shell (30) and the thickness of the second lower shell (40) are both set to H2, where H1≤3.0mm and H2≤3.0mm.

3. The plastic liquid storage tank according to claim 2, characterized in that, H1 = H2.

4. The plastic liquid storage tank according to claim 1, characterized in that, The first upper housing (10) is provided with a first protrusion (11), and the first lower housing (20) is provided with a first groove (21). The first protrusion (11) is rotatably welded to the first groove (21). The second upper housing (30) is provided with a second protrusion (31), and the second lower housing (40) is provided with a second groove (41). The second protrusion (31) is rotatably welded to the second groove (41).

5. The plastic liquid storage tank according to claim 1, characterized in that, The plastic storage tank also includes an inlet pipe (51), one end of which is connected to the inlet port (22), and the other end of which is placed in the accommodating chamber (50) and extends to the top area of ​​the accommodating chamber (50).

6. The plastic liquid storage tank according to claim 5, characterized in that, The plastic storage tank also includes a first filter layer (52), a second filter layer (53), and a desiccant (54). The first filter layer (52) and the second filter layer (53) are both connected to the inner wall of the first upper shell (10), and the first filter layer (52) is located above the second filter layer (53) and together with the second filter layer (53) forms a space for accommodating the desiccant (54).

7. The plastic liquid storage tank according to claim 6, characterized in that, Along the height direction of the plastic storage tank, the height of the end of the inlet pipe (51) away from the inlet (22) is higher than the height of the first filter layer (52).

8. The plastic liquid storage tank according to claim 1, characterized in that, The plastic storage tank also includes two sealing connectors (60), one of which is embedded in the inlet (22) and the other is embedded in the outlet (23). Each sealing connector (60) is provided with a through hole (611), one end of which is connected to the accommodating chamber (50) and the other end of which is used to connect to the circulation pipeline.

9. The plastic liquid storage tank according to claim 8, characterized in that, The sealing connector (60) includes a connector (61) and a sealing body (62). The sealing body (62) is disposed in the radial direction of the connector (61). The sealing body (62) is press-fitted with the inner wall of the liquid inlet (22) or the inner wall of the liquid outlet (23). The through hole (611) extends through the axial direction of the connector (61).

10. An automotive thermal management system, characterized in that, The automotive thermal management system includes a compressor, a condenser, an expansion valve, an evaporator, a circulation pipeline, and a plastic reservoir according to any one of claims 1-9. The outlet of the compressor is connected to the inlet of the condenser through the circulation pipeline, the outlet of the condenser is connected to the inlet (22) of the plastic reservoir through the circulation pipeline, the outlet (23) of the plastic reservoir is connected to the inlet of the expansion valve through the circulation pipeline, the outlet of the expansion valve is connected to the inlet of the evaporator through the circulation pipeline, and the outlet of the evaporator is connected to the inlet of the compressor through the circulation pipeline, thereby forming a refrigerant circulation loop.

Images