Filtering device of automobile liquid storage tank

Abstract

The utility model relates to a filtering device of an automobile liquid storage tank, which comprises a filter screen support body provided with a filter screen and a switching end cover, the switching end cover is provided with a plurality of annular parts, the annular parts are sequentially connected to form a step-by-step sunken annular step, the annular step is used for embedding and inserting a liquid guide pipe, each annular part is provided with a through hole along the axial direction, and the through hole is communicated with the filter screen support body. The through hole penetrates through each annular part and the bottom of the switching end cover, the annular parts of the switching end cover are embedded into the inner cavity of the filter screen supporting body, and the switching end cover is mounted at the liquid outlet opening end of the filter screen supporting body. According to the filter assembly, the adapter end cover is additionally arranged and can be matched with liquid guide pipes with various pipe diameters, the diameter of the filter screen supporting body is increased due to the arrangement of the adapter end cover, so that the area of the filter screen arranged on the filter screen supporting body is also increased, the filtering capacity of the filter device is improved, and compared with a filter assembly in the prior art, the filter assembly is higher in filtering efficiency and better in filtering effect. And the device is also compatible with a liquid guide tube.

Description

Technical Field

[0001] The utility model relates to an automobile air-conditioning refrigeration system accessory, in particular to a filtering device for an automobile liquid storage tank. Background Art

[0002] In the automobile air conditioning refrigeration system, the liquid storage tank is an indispensable and important component, which is mainly used to store refrigerant and replenish refrigerant to the condenser at any time to ensure the normal operation of the refrigeration system. A filter assembly is provided in the liquid storage tank to filter impurities in the refrigerant to ensure smooth flow of the refrigerant in the refrigeration system. The filter assembly in the prior art is usually composed of a filter support body and a filter installed on the filter support body. The liquid outlet end of the filter support body is directly connected to the liquid inlet pipe. Due to the different diameters of the liquid inlet pipe, the filter support body needs to be adapted to the liquid inlet pipe during design. When the diameter of the liquid inlet pipe is thinner, the size of the filter support body adapted thereto cannot be increased, and the area of ​​the filter installed on the filter support body is related to the size of the filter support body. If the size of the filter support body is small, it means that the filter area is small, and the amount of refrigerant filtered by the filter assembly will become smaller.

[0003] Based on the above reasons, the inventor improved the design of the filter assembly structure in the prior art, and made the filter device compatible with liquid inlet tubes of various diameters while increasing the filter area, which resulted in this case. Utility Model Content

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A filtering device for an automobile liquid storage tank comprises a filter support body provided with a filter and an adapter end cover, the adapter end cover having a plurality of annular portions, the annular portions being sequentially connected to form step-by-step sunken annular steps, the annular steps being used for the insertion and engagement of a liquid guide tube, each annular portion being provided with a through hole along an axial direction, the through hole penetrating each annular portion and the bottom of the adapter end cover, the annular portion of the adapter end cover being embedded in an inner cavity of the filter support body, and the adapter end cover being mounted on an open end of a liquid outlet of the filter support body.

[0006] Furthermore, the filter support body is a hollow cylinder with a hollow structure, the filter is arranged in the hollow part, the top of the filter support body is an open end for liquid outlet, and the inner diameter of the cylinder of the filter support body is larger than the outer diameter of the liquid inlet tube inserted into the adapter end cover.

[0007] Furthermore, the filter support body includes an annular support portion and a chassis arranged at intervals, the annular support portion and the chassis are connected by a plurality of vertical support bars, a hollow portion is formed between adjacent support bars, an annular convex edge is provided on the top surface of the annular support portion, the outer diameter of the annular convex edge is smaller than the outer diameter of the annular support portion, and a limiting step is provided on the inner wall of the annular support portion.

[0008] Furthermore, an annular reinforcement rib is provided between the annular support portion and the chassis, and the annular reinforcement rib connects adjacent support bars into one.

[0009] Furthermore, the top of the adapter end cover extends radially outward to form a flange, and the lower part of the adapter end cover is the liquid inlet part. A plurality of annular parts are formed between the flange and the liquid inlet part. The inner circle of the flange gradually shrinks toward the axis to form a multi-level sunken annular step. A through hole is axially provided on the bottom surface of the liquid inlet part to penetrate each annular part. The adapter end cover is snap-connected to the filter support body, and a distance is left between the bottom surface of the liquid inlet part and the bottom surface of the filter support body.

[0010] Furthermore, a through hole is also provided on the side surface of the liquid inlet portion, and the side through hole is communicated with the axial through hole on the bottom surface of the liquid inlet portion.

[0011] Furthermore, a protruding block is provided on the outer wall of the annular portion immediately below the flange and adjacent to the flange.

[0012] The filter device designed by the utility model can be adapted to liquid drainage tubes of various diameters by adding an adapter end cover. The liquid drainage tube of the corresponding diameter only needs to be inserted into the corresponding matching annular step on the adapter end cover. The setting of the adapter end cover allows the diameter of the filter support body to be increased, thereby increasing the filter area set on the filter support body. The filtration amount of the filter device will be improved. Compared with the filter assembly in the prior art, it not only has higher filtration efficiency, but also has adaptability and compatibility with the liquid drainage tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the assembly of the filter device in the embodiment;

[0014] Figure 2 for Figure 1 Schematic diagram from an upward perspective;

[0015] Figure 3 It is a schematic diagram of the structure of the filter support body in the filter device;

[0016] Figure 4 It is a schematic diagram of the transfer end cover in the filtering device from an upward perspective;

[0017] Figure 5 It is a schematic diagram of a transfer end cover in a filtering device from a top view;

[0018] Figure 6 A schematic diagram of the filter device after being assembled with a liquid inlet tube of one of the diameters.

[0019] Description of Figure Numbers:

[0020] 1. filter support body; 11. annular support portion; 12. annular reinforcement rib; 13. support bar; 14. chassis; 15. annular convex edge; 16. limiting step; 17. filter;

[0021] 2. Transfer end cap; 21. Flanging; 22. First annular portion; 23. Second annular portion; 24. Third annular portion; 25. Fourth annular portion; 26. Liquid inlet portion; 27. Bottom liquid inlet hole; 28. Side liquid inlet hole; 29. ​​Block;

[0022] 3. Drainage tube. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] This embodiment discloses a filtering device for a liquid storage tank of an automobile, such as Figure 1 and Figure 2 As shown, it is mainly composed of a filter support body 1 and an adapter end cap 2. The filter support body 1 and the adapter end cap 2 are two independent components, which can be formed by injection molding of plastic materials. Among them, the filter support body 1 is mainly used to provide support for the filter, so that the refrigerant can filter out impurities through the filter; and the adapter end cap 2 is mainly used to match and connect various liquid inlet pipes 3 with different diameters (such as Figure 6 As shown in the figure), after the adapter end cover 2 is assembled and connected with the filter screen support body 1, the refrigerant filtered by the filter screen flows through the adapter end cover 2 and then flows into the liquid inlet pipe 3. In order to achieve the above purpose, in terms of structural design, the adapter end cover 2 needs to be provided with a structure capable of fitting liquid inlet pipes 3 of different diameters. In this embodiment, this is achieved by multiple annular parts with variable diameters, so that each annular part is sequentially connected to form a step-by-step sunken annular step, and the liquid inlet pipe 3 is inserted into the annular step for fixing. Since the filtered refrigerant needs to flow into the liquid inlet and outlet pipe 3 through the adapter end cover 2, a through liquid inlet and outlet hole needs to be provided on the adapter end cover 2. In this embodiment, a through hole is provided axially at the center of each annular portion, so that the through hole passes through each annular portion and the bottom of the adapter end cover 2. After such a design, both ends of the adapter end cover 2 are open and the inside is connected. It is only necessary to install the adapter end cover 2 on the liquid outlet open end of the filter support body 1, so that the annular portion of the adapter end cover 2 is embedded in the inner cavity of the filter support body 1. After the refrigerant outside the filter support body 1 flows through the filter to filter out impurities, it flows into the inner cavity of the adapter end cover 2 from the through hole at the bottom of the adapter end cover 2, and then flows out from the liquid inlet pipe 3 installed on the top of the adapter end cover 2. The specific structure of the filter support body 1 and the adapter end cover 2 in this embodiment is described below in conjunction with the accompanying drawings.

[0025] like Figure 3As shown, the filter support body 1 is a hollow cylinder, at least the top is open, and the top open end serves as the liquid outlet. The side of the cylinder is provided with a hollow structure, and the hollow part is provided with a filter 17. In order to maximize the area of ​​the filter 17, the inner diameter of the cylinder of the filter support body 1 in this embodiment is larger than the outer diameter of the thickest liquid inlet tube 3 that can be inserted into the adapter end cover 2. The specific structural design is as follows: the upper part of the filter support body 1 is an annular support part 11, and the lower part is a chassis 14. The annular support part 11 and the chassis 14 are connected by a plurality of spaced vertical support bars 13, and a hollow part is formed between adjacent support bars 13, and a filter 17 is arranged in the hollow part; in order to improve the support strength, in this embodiment, an annular reinforcement rib 12 is also provided between the annular support part 11 and the chassis 14, and the annular reinforcement rib 12 connects the adjacent support bars 13 as a whole; in this embodiment, the inner diameter of the annular support part 11 is larger than the diameter of the chassis 14, so that a limiting step 16 is formed on the inner wall of the annular support part 11, and an annular convex edge 15 is provided on the top surface of the annular support part 11, and the outer diameter of the annular convex edge 15 is smaller than the outer diameter of the annular support part 11, and the entire filter support body 1 is integrally formed by injection molding.

[0026] like Figure 4 and Figure 5 As shown, the top of the adapter end cap 2 extends radially outward to form a flange 21, and the lower part of the adapter end cap 2 is a liquid inlet 26. The flange 21 and the liquid inlet 26 are connected as a whole through a plurality of annular parts connected in sequence. The inner circles of the plurality of annular parts located at the lower part of the flange 21 gradually shrink toward the axis to form a multi-level sunken annular step, and each level of the annular step can be corresponding to a diameter of the liquid guide tube 3. The number of levels of the annular steps can be set according to actual needs. In the attached drawings of this embodiment, four annular parts are set for display, which are the first annular part 22, the second annular part 23, the third annular part 24, and the fourth annular part 25 from top to bottom, and the inner diameters of the above annular parts gradually shrink. A through hole is provided in the bottom surface of the liquid inlet 26 along the axial direction to penetrate each annular part, and the through hole serves as the bottom liquid inlet hole 27. In order to increase the amount of liquid inlet, in this embodiment, a plurality of side liquid inlet holes 28 are also provided at intervals on the side wall of the liquid inlet 26, so that the side liquid inlet holes 28 and the bottom liquid inlet hole 27 are connected to each other. In this embodiment, for the convenience of assembly, the adapter end cover 2 is connected to the filter support body 1 by a snap-fit ​​method, and therefore, a plurality of raised blocks 29 are provided at intervals on the outer wall of the first annular portion 22 .

[0027] When the adapter end cap 2 is assembled with the filter support body 1, the adapter end cap 2 is inserted from the top open end of the filter support body 1, the clamping block 29 is fixed with the inner wall of the annular support part 11, the first annular part 22 is limited by the limiting step 16, the bottom of the flange 21 is limited by the annular convex edge 15, and a certain distance is left between the bottom surface of the liquid inlet part 26 and the bottom plate 14 of the filter support body 1 to facilitate liquid inlet. Due to the provision of the annular convex edge 15, a certain distance is formed between the bottom surface of the flange 21 after assembly and the top surface of the annular support part 11, so that it is convenient to apply external force from here to disassemble the adapter end cap 2 from the filter support body 1.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filtering device for an automobile liquid storage tank, characterized in that: It includes a filter support body with a filter and an adapter end cover. The adapter end cover has multiple annular parts, which are connected in sequence to form step-by-step sunken annular steps. The annular steps are used for the insertion of a liquid guide tube. Each annular part has a through hole along the axial direction. The through hole passes through each annular part and the bottom of the adapter end cover. The annular part of the adapter end cover is embedded in the inner cavity of the filter support body, and the adapter end cover is installed at the liquid outlet open end of the filter support body.

2. The filtering device for an automobile liquid storage tank according to claim 1, characterized in that: The filter support body is a hollow cylinder with a hollow structure, a filter is arranged in the hollow part, the top of the filter support body is an open end for liquid discharge, and the inner diameter of the cylinder of the filter support body is larger than the outer diameter of the liquid introduction tube inserted into the adapter end cover.

3. The filtering device for an automobile liquid storage tank according to claim 2, characterized in that: The filter support body includes an annular support portion and a chassis arranged at intervals. The annular support portion and the chassis are connected by a plurality of vertical support bars. A hollow portion is formed between adjacent support bars. An annular convex edge is provided on the top surface of the annular support portion. The outer diameter of the annular convex edge is smaller than the outer diameter of the annular support portion. A limiting step is provided on the inner wall of the annular support portion.

4. The filtering device for an automobile liquid storage tank according to claim 3, characterized in that: An annular reinforcement rib is also provided between the annular support portion and the chassis, and the annular reinforcement rib connects adjacent support bars into one.

5. The filtering device for an automobile liquid storage tank according to claim 1, characterized in that: The top of the adapter end cover extends radially outward to form a flange, and the lower part of the adapter end cover is the liquid inlet part. A plurality of annular parts are formed between the flange and the liquid inlet part. The inner circle of the flange gradually shrinks toward the axis to form a multi-level sunken annular step. A through hole is axially provided on the bottom surface of the liquid inlet part to penetrate each annular part. The adapter end cover is snap-connected to the filter support body, and a distance is left between the bottom surface of the liquid inlet part and the bottom surface of the filter support body.

6. The filtering device for an automobile liquid storage tank according to claim 5, characterized in that: A through hole is also provided on the side surface of the liquid inlet portion, and the side through hole is communicated with the axial through hole on the bottom surface of the liquid inlet portion.

7. The filtering device for an automobile liquid storage tank according to claim 5, characterized in that: A protruding clamping block is arranged on the outer wall of the annular portion below the flange and adjacent to the flange.

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