Sealed filter for gas-liquid separator of automobile air conditioner

Abstract

The utility model discloses a sealing filter for an automobile air conditioner gas-liquid separator, which comprises an inner filter cartridge, an annular sleeve body and an O-shaped ring, the inner filter cartridge is provided with a hollow filter cavity, the bottom of the filter cavity is closed, and the side wall of the filter cavity is provided with a through hole; the annular sleeve body is sleeved on the periphery of the inner filter cartridge, an annular mounting groove is formed in the outer surface of the annular sleeve body, and the O-shaped ring is mounted in the mounting groove. The annular sleeve body and the inner filter cartridge are of a split structure, a positioning groove is formed in the upper end of the annular sleeve body, and the inner filter cartridge is provided with a convex clamping groove inserted into the positioning groove; vertical rib plates are arranged at the lower end of the annular sleeve body to form a plurality of refrigerant circulation channels, and a spacing space is arranged between the inner filter cartridge and the annular sleeve body. The structure is excellent in sealing performance, reliable in assembly and smooth in refrigerant circulation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile air conditioner accessories, especially a sealing filter for an automobile air conditioner gas-liquid separator. BACKGROUND

[0002] At present, the gas-liquid separator in the automobile air conditioning system is generally provided with a filter structure, which is used for further filtering out residual liquid, impurities or solid particles entrained in the refrigerant, so as to improve the reliability of system operation and the service life of the compressor. The common filter structure forms include a filter screen, a filter cartridge or a filter core arranged at the lower part of the air suction passage or the air outlet pipe, and the installation mode and the filter path are not the same.

[0003] In the prior art, a relatively typical way is to arrange the filter screen at the lower part of the air inlet pipe and the air suction pipe, and to complete the refrigerant filtering and oil return guiding through the bottom through hole or channel in cooperation with the oil return structure. The overall integration of this kind of structure is relatively high, but the filter screen is mostly directly fixed at the bottom of the body, and the assembly is complex and inconvenient to disassemble and assemble, and the sealing property depends on the pressure bonding cooperation between the components, and there is a risk of micro leakage.

[0004] Another common structure is to arrange the filter in the inner side of the air outlet passage or the inlet end thereof, and to be fixedly connected with the air outlet pipe through riveting, clamping or the like, and some filters are integrally injection molded with the filter screen through a plastic base, which has the advantages of structure simplification and convenient manufacturing. However, this kind of structure mostly relies on the structure body to realize the limiting and sealing, and cannot further enhance the sealing performance between the filter and the cylinder or the shell, and still has the risk of refrigerant leakage, especially the sealing reliability is insufficient under high pressure or high temperature environment, and needs to be optimized and improved. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art, provide a sealing filter for an automobile air conditioner gas-liquid separator, arrange an annular sleeve and a sealing structure provided with an O-ring outside the filter, improve the sealing performance between the filter and the external components, reduce the risk of internal leakage of the refrigerant during the gas-liquid separation process, and ensure the assembly reliability and the stability of the structure.

[0006] The technical scheme adopted by the utility model to solve the technical problem is: a sealing filter for an automobile air conditioner gas-liquid separator, comprising an inner filter cartridge, an annular sleeve and an O-ring, the inner filter cartridge is a cylindrical structure with one end closed and the other end open, and a hollow filter cavity is arranged inside, the bottom of the filter cavity is a closed structure, and a plurality of through holes for medium entering are arranged on the side wall; the annular sleeve is a sleeve structure, which is sleeved on the outer peripheral part of the inner filter cartridge, and an annular mounting groove is processed on the outer surface of the annular sleeve, the O-ring is mounted in the mounting groove, and the sealing connection between the outer part and the O-ring is realized.

[0007] Further, the annular sleeve body and the inner filter cartridge form a split structure, the upper end of the annular sleeve body is provided with an axial positioning groove, the upper end of the inner filter cartridge is provided with a plurality of circumferentially spaced protruding clamping grooves, the plurality of protruding clamping grooves are inserted into the positioning groove, and the embedded connection and axial limiting between the annular sleeve body and the inner filter cartridge are realized through structural cooperation.

[0008] Further, the protruding clamping groove is a strip-shaped structure extending axially upward, and an insertion gap is formed between opposite sides of each protruding clamping groove, which is used for inserting and cooperating with an external connecting member to realize position cooperation in subsequent assembly.

[0009] Further, at least one through hole is arranged on the side wall of the inner filter cartridge, the through hole is a through hole in a circular or other geometric shape, and is used for fluid introduction into the filter cavity.

[0010] Further, the lower end of the annular sleeve body is uniformly provided with a plurality of vertically arranged rib plates spaced in the circumferential direction, and the plurality of vertically arranged rib plates form an open area, so that the lower end of the annular sleeve body is divided into a plurality of independent flow channels for the introduction of refrigerant and other media.

[0011] Further, a spacing space is arranged between the outer wall of the inner filter cartridge and the inner wall of the annular sleeve body, the spacing space is arranged in the radial direction, so that the inner filter cartridge and the annular sleeve body are kept in a non-tight state, and a certain tolerance compensation capability is ensured during assembly of the assembly.

[0012] The beneficial effects of the utility model are:

[0013] The utility model discloses a ring-shaped mounting groove is arranged on the outer surface of the annular sleeve body, and an O-shaped ring is installed, which can effectively improve the sealing performance between the filter and the external structure, prevent refrigerant leakage, and improve the sealing reliability of the gas-liquid separation system.

[0014] The hollow structure of the inner filter cartridge with the through hole can pre-filter the refrigerant before entering the coaxial pipe, help to block residual liquid, impurities or particulate matter, improve the filtering effect, and ensure the safe operation of the system.

[0015] The utility model discloses a plurality of vertically arranged rib plates are arranged on the lower end of the annular sleeve body in the circumferential direction, so that the lower end forms a plurality of flow channels, which is beneficial to the smooth entry of refrigerant into the filter, and optimizes the flow path of the refrigerant.

[0016] The utility model discloses that the inner filter cartridge and the annular sleeve body form a split structure, the embedded cooperation of the upper end protruding clamping groove and the positioning groove is adopted to realize positioning connection, and a spacing space is arranged between the two, which improves the convenience and stability of assembly assembly, and ensures that the structure connection is compact and flexible. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure perspective view of the utility model;

[0018] Figure 2 is the overall structure front view of the utility model;

[0019] Figure 3 is the inner filter cartridge structure schematic view of the utility model;

[0020] Figure 4 is the annular sleeve structure schematic view of the utility model;

[0021] Fig. 1 - inner filter cartridge; 11 - hollow filter cavity; 12 - through hole; 13 - protruding clamping groove; 2 - annular sleeve; 21 - positioning groove; 22 - vertical rib plate; 3 - O ring. DETAILED DESCRIPTION

[0022] The utility model will be further described in conjunction with the drawings. These drawings are all simplified schematic views and only show the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model.

[0023] Please see Figures 1 to 4 The utility model provides a sealing filter for automobile air conditioner gas-liquid separator, including inner filter cartridge 1, annular sleeve 2 and O ring 3.

[0024] As Figure 2 Indicated, the inner filter cartridge 1 is roughly cylindrical structure, is provided with hollow filter cavity 11, the bottom of hollow filter cavity 11 is closed structure, for receiving refrigerant liquid, prevent it from leaking out from lower end;Hollow filter cavity 11's lateral wall is provided with at least one through hole 12, this through hole 12 is used to make refrigerant liquid or gas-liquid mixture can flow out to external space after entering filter cavity, realizes the flow demand of refrigerant circulating system in gas-liquid separator.In addition, the lower end of annular sleeve 2 is provided with multiple vertical rib plates 22 spaced apart along the circumferential direction, and the open flow channel is formed between the multiple rib plates 22, which is used to provide a path for the refrigerant in the gas-liquid separator to enter the filter cavity, so as to ensure that the refrigerant can flow into the filter bottom and hollow filter cavity area from the periphery, flow out through the through hole 12, realize the import and export circulation of refrigerant.

[0025] As Figure 3As shown, the upper end of the inner filter cartridge 1 is provided with a plurality of protruding clamping grooves 13 arranged at intervals in the circumferential direction, which extend axially outward from the upper end face and have a forked structure as a whole, which is adapted to the coaxial tube insertion part in the gas-liquid separator. When the filter is assembled in the gas-liquid separator, the coaxial tube is inserted into the hollow area of the filter, and the protruding clamping grooves 13 can cooperate with the external limiting structure of the coaxial tube, thereby achieving reliable clamping and positioning between the filter and the coaxial tube, ensuring that the filter will not be axially displaced or fall off during operation.

[0026] As shown in Figure 4 , the annular sleeve body 2 has a sleeve structure for externally sleeving the inner filter cartridge 1. The upper end of the annular sleeve body 2 is provided with a plurality of positioning grooves 21 for cooperating with the protruding clamping grooves 13 on the inner filter cartridge 1. After the clamping grooves 13 are inserted into the positioning grooves 21, they can be limited and positioned in the radial and axial directions at the same time, so that the annular sleeve body 2 and the inner filter cartridge 1 remain in a stable embedded state.

[0027] The outer surface of the annular sleeve body 2 is provided with an annular mounting groove which forms a ring-shaped recess structure in the circumferential direction for mounting the O-ring 3. After mounting, the O-ring 3 is arranged on the outside of the annular sleeve body, which provides effective radial sealing when the filter is installed in the gas-liquid separator shell or in contact with the outer surface of the coaxial tube cavity, preventing internal leakage of the refrigerant in the filter installation area.

[0028] In addition, as shown in Figure 1 and Figure 2 , a spacing space is provided between the inner filter cartridge 1 and the annular sleeve body 2, that is, when they are connected in a sleeved state, they are not fully circumferentially attached but have a certain annular or axial spacing in some non-limiting areas, which provides a spatial transition area for the refrigerant to enter the hollow cavity of the filter from the annular sleeve. This spacing design helps to improve the efficiency of refrigerant introduction and prevent refrigerant flow from being blocked due to close fitting.

[0029] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable persons skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A sealed filter for an automotive air conditioning gas-liquid separator, comprising an inner filter cylinder, an annular sleeve, and an O-ring, characterized in that: The inner filter cylinder is provided with a hollow filter cavity. The bottom of the filter cavity is a closed structure, and the side wall is provided with a through hole. The annular sleeve is fitted around the outer circumference of the inner filter cylinder. The outer surface of the annular sleeve is provided with an annular mounting groove, and the O-ring is installed in the annular mounting groove.

2. A sealed filter for an automotive air conditioning gas-liquid separator according to claim 1, characterized in that: The annular sleeve and the inner filter cylinder are separate structures. The upper end of the annular sleeve is provided with a positioning groove, and the upper end of the inner filter cylinder is provided with a protruding slot. The protruding slot is inserted into the positioning groove to achieve the fitting and positioning between the annular sleeve and the inner filter cylinder.

3. A sealed filter for an automotive air conditioning gas-liquid separator according to claim 2, characterized in that: The raised slot has a gap for insertion in the middle.

4. A sealed filter for an automotive air conditioning gas-liquid separator according to claim 1, characterized in that: There is at least one through hole.

5. A sealed filter for an automotive air conditioning gas-liquid separator according to claim 1, characterized in that: The lower end of the annular sleeve is provided with multiple vertical ribs spaced apart along the circumference, which divide the lower end of the annular sleeve into multiple flow channels.

6. A sealed filter for an automotive air conditioning gas-liquid separator according to claim 2, characterized in that: A gap space is provided between the inner filter cylinder and the annular sleeve.

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