High sealing automobile air conditioner high-low pressure pipeline

Abstract

The utility model relates to the technical field of automobile air conditioner accessories discloses a high sealing property automobile air conditioner high low pressure pipeline, including low pressure pipeline, high pressure pipeline, connecting mechanism and support mechanism, connecting mechanism includes the connecting ring fixed in the pipeline end part, the connecting pipe and the ring of sliding connection in the inner wall of connecting ring, is equipped with the first sealing ring in the connecting pipe outer wall, is equipped with the second sealing ring in the connecting place outer wall, the inner wall of ring is equipped with the clamping block cooperation connecting pipe outer wall's clamping groove locking, and the support mechanism includes the rubber block of pipeline, fixed block and base, and the base bottom is equipped with the rubber plate. The utility model through first sealing ring and ring pressure tight second sealing ring forms double seal, and cooperates the clamping block and clamping groove locking, effectively prevents refrigerant leakage and pipeline drop, through the double shock absorbing structure of rubber block and rubber plate, effectively absorbs the vehicle vibration, prevents the pipeline deformation rupture, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning parts technology, and in particular to a high-sealing automotive air conditioning high and low pressure pipeline. Background Technology

[0002] Automotive air conditioning systems rely on high and low pressure pipelines to circulate refrigerant between the compressor, condenser, and evaporator. Currently, the connection between pipelines and equipment ports mainly uses flanges or threads for fastening with a single-layer sealing ring. During actual vehicle operation, the internal pressure of the pipeline fluctuates frequently, and the external driving environment is complex. The traditional single-layer sealing structure lacks a redundant protection mechanism. Once the internal sealing ring ages naturally or undergoes slight displacement due to pressure impact, the refrigerant will leak directly into the external environment, resulting in a significant decrease in the cooling efficiency of the air conditioning system and causing environmental pollution.

[0003] Furthermore, the way the pipes are fixed inside the vehicle body also has significant technical defects. Existing fixing devices mostly use rigid metal clamps to directly lock the metal pipes to the frame. During the vehicle's operation, the vibrations of the engine and the road surface are directly transmitted to the pipe wall through the rigid fixing structure. This rigid contact lacks the necessary buffer and energy absorption structure. Long-term mechanical vibration causes fatigue stress concentration at the pipe fixing point, which in turn leads to deformation, wear, or even fatigue fracture of the pipe wall, seriously affecting the service life and safety of the air conditioning system.

[0004] Therefore, this utility model proposes a high-sealing automotive air conditioning high and low pressure pipeline to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems of low reliability in the existing technology of automotive air conditioning high and low pressure pipelines, such as leakage due to the simple sealing structure at the connection and low reliability due to the lack of buffering when the pipeline is rigidly fixed to the inner wall of the car, resulting in deformation or breakage due to vibration, this utility model aims to provide a high-sealing automotive air conditioning high and low pressure pipeline with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a high-sealing automotive air conditioning high and low pressure pipeline, including: a low-pressure pipeline, a high-pressure pipeline, a connecting mechanism set at both ends of the low-pressure pipeline and both ends of the high-pressure pipeline, a support mechanism set on the outer wall of the low-pressure pipeline and the outer wall of the high-pressure pipeline, as well as a connecting ring, a connecting pipe, a flange, a first sealing ring, a circular ring, a second sealing ring, a locking block, a locking groove, a rubber block, a fixing block, a connecting block, a base, and a rubber plate.

[0007] In the connecting mechanism, the connecting ring is fixedly connected to the end of the low-pressure pipe and the end of the high-pressure pipe. A connecting pipe is slidably connected to the inner wall of the connecting ring. A flange is fixedly connected to the end of the connecting pipe away from the connecting ring. A sealing ring is fixedly connected to the outer wall of the connecting pipe. A circular ring is slidably connected to the outer wall of the connecting ring. A sealing ring is provided on the outer wall of the connection between the connecting ring and the connecting pipe. A locking block is fixedly connected to the top of the inner wall of the circular ring. A locking groove is opened on the outer wall of the connecting pipe. In the supporting mechanism, the rubber block is wrapped around the outer wall of the low-pressure pipe and the outer wall of the high-pressure pipe. Two fixing blocks are provided on the outer wall of the rubber block. The top outer walls of the two fixing blocks are fixedly connected to each other by a connecting block. A base is threadedly connected to the bottom outer wall of the two fixing blocks. A rubber plate is fixedly connected to the bottom of the base.

[0008] Furthermore, the first sealing ring abuts against the inner wall of the connecting ring, and the second sealing ring is covered when the ring slides. The rotation of the ring causes the locking block to be inserted into the bottom of the inner wall of the slot to lock the connecting ring and the connecting pipe, thereby forming a combination structure of double sealing and mechanical locking. The rubber block isolates the low-pressure pipe and the high-pressure pipe from contact with the fixing block, and together with the rubber plate under the base, forms a double shock-absorbing support structure.

[0009] Preferably, the slot is an L-shaped guide slot, which includes a sliding section extending axially along the connecting pipe and a locking section connected to the end of the sliding section and extending circumferentially. The card block enters through the sliding section and is screwed into the locking section.

[0010] Preferably, two sealing rings are fixedly connected to the outer wall of the connecting pipe. The two sealing rings are arranged at intervals along the axial direction of the connecting pipe, and both sealing rings are located between the inner wall of the connecting ring and the outer wall of the connecting pipe.

[0011] Preferably, the two fixing blocks are symmetrically arranged on the left and right sides of the rubber block, with the inner wall of the rubber block tightly attached to the outer wall of the low-pressure pipe and the outer wall of the high-pressure pipe, and the outer wall of the rubber block tightly attached to the inner wall of the fixing block.

[0012] Preferably, the connecting block has a through hole, and the two fixing blocks are locked and fixed by a bolt that passes through the through hole and is screwed into the top of the fixing block.

[0013] Preferably, the bottom outer wall of the fixing block is provided with an external thread, and the top inner wall of the base is provided with an internal thread groove that matches the external thread. The fixing block is rotated into the base to adjust its height and fix it.

[0014] Preferably, the rubber sheet is fixed to the bottom surface of the base by integral vulcanization molding, and the surface of the rubber sheet is provided with anti-slip texture.

[0015] Preferably, the low-pressure pipe and the high-pressure pipe are arranged in parallel, and the rubber block has two independent through holes for the low-pressure pipe and the high-pressure pipe to pass through respectively. The inner diameter of the independent through hole is interference-fitted with the outer diameter of the pipe.

[0016] Preferably, the second sealing ring is made of aging-resistant EPDM rubber, and the inner diameter of the ring is slightly smaller than the outer diameter of the second sealing ring to form an interference seal.

[0017] Preferably, the flange has several mounting through holes distributed around its edge, and the flange is used to be fixedly connected to the interface flanges of the external compressor, condenser and evaporator by means of bolt assemblies.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problems of refrigerant leakage and loosening due to single-layer seal failure at the connection of automotive air conditioning pipes in the prior art, and achieves the effect of providing double sealing protection to prevent refrigerant leakage, while achieving a fast and stable connection to prevent accidental pipe detachment. It utilizes a connection mechanism with double sealing and locking functions at the ends of low-pressure and high-pressure pipes. The first sealing ring on the outer wall of the connecting pipe and the inner wall of the connecting pipe cooperate to form an internal seal, and the sliding ring presses the second sealing ring on the outer wall of the connection to form an external seal. At the same time, the locking block on the inner wall of the ring and the locking groove on the connecting pipe rotate and lock together.

[0019] 2. This utility model solves the problem in the prior art where pipelines are directly and rigidly fixed to the inner wall of the car with metal parts, lacking a buffer structure, resulting in wear, deformation, or even fatigue fracture of the pipelines during long-term driving vibration. It achieves the effects of effectively absorbing and buffering vibration, protecting the integrity of the pipeline structure, reducing noise, and significantly extending the service life of the pipelines. Attached Figure Description

[0020] Figure 1 A perspective view of a high-sealing automotive air conditioning high and low pressure pipeline proposed in this utility model; Figure 2 This is a split view of the annular structure of a high- and low-pressure pipeline for an automotive air conditioning system with high sealing performance, as proposed in this utility model. Figure 3 This is a cross-sectional view of a circular ring for a high- and low-pressure automotive air conditioning system with high sealing performance, as proposed in this utility model. Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a cross-sectional view of a connecting ring for a high- and low-pressure automotive air conditioning system, as proposed in this utility model. Figure 6This is a split view of the connecting pipe for a high-sealing automotive air conditioning high and low pressure pipeline proposed in this utility model; Figure 7 This is a cross-sectional view of a rubber block for a high- and low-pressure pipeline of an automotive air conditioning system with high sealing performance, as proposed in this utility model.

[0021] Legend: 1. Low-pressure pipeline; 2. High-pressure pipeline; 3. Connection mechanism; 301. Connecting ring; 302. Sealing ring one; 303. Connecting pipe; 304. Flange; 305. Circular ring; 306. Locking block; 307. Locking groove; 308. Sealing ring two; 4. Support mechanism; 401. Rubber block; 402. Fixing block; 403. Connecting block; 404. Base; 405. Rubber plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in 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, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0023] Example: Please refer to Figures 1 to 7 This utility model provides a high-sealing automotive air conditioning high and low pressure pipeline, which aims to solve the problems of refrigerant leakage due to poor sealing at the connection of automotive air conditioning pipelines and vibration damage caused by the lack of a buffer structure between the pipeline and the inner wall of the car in the prior art.

[0024] Please refer to Figure 1 and Figure 2 A high-sealing automotive air conditioning high and low pressure pipeline includes a low-pressure pipeline 1 and a high-pressure pipeline 2 arranged in parallel on one side of the low-pressure pipeline 1. The left and right ends of the low-pressure pipeline 1 and the left and right ends of the high-pressure pipeline 2 are fixedly provided with connection mechanisms 3 for sealing connection with external equipment. The middle outer wall of the low-pressure pipeline 1 and the middle outer wall of the high-pressure pipeline 2 are jointly fixedly provided with support mechanisms 4 for flexibly supporting and fixing the pipeline. The low-pressure pipeline 1 is used to transport low-temperature, low-pressure gaseous refrigerant flowing back from the evaporator to the compressor, and the high-pressure pipeline 2 is used to transport high-temperature, high-pressure gaseous refrigerant flowing from the compressor to the condenser.

[0025] Please refer to Figure 3 , Figure 5 and Figure 6The connecting mechanism 3 includes a connecting ring 301 fixedly connected to the end of the low-pressure pipe 1 and the end of the high-pressure pipe 2. A connecting pipe 303 is slidably connected to the inner wall of the connecting ring 301. A flange 304 is fixedly connected to the end of the connecting pipe 303 away from the connecting ring 301. Several mounting through holes are distributed around the edge of the flange 304. The flange 304 is used to be fixedly connected to the interface flange of the external compressor, condenser and evaporator by bolts passing through the mounting through holes. Two sealing rings 302 are fixedly connected to the outer wall of the connecting pipe 303, which are spaced apart along the axial direction of the connecting pipe 303. Both sealing rings 302 are located between the inner wall of the connecting ring 301 and the outer wall of the connecting pipe 303. The outer wall of the sealing rings 302 tightly abuts against the inner wall of the connecting ring 301, thereby forming the first internal sealing structure when the connecting pipe 303 is inserted into the connecting ring 301, preventing refrigerant from leaking from the mating gap between the connecting ring 301 and the connecting pipe 303.

[0026] Please refer to Figure 4 , Figure 5 and Figure 6 A circular ring 305 is slidably connected to the outer wall of the connecting ring 301. A second sealing ring 308 is provided on the outer wall of the connection between the connecting ring 301 and the connecting pipe 303. When the circular ring 305 slides to the connection between the connecting ring 301 and the connecting pipe 303, it completely covers the second sealing ring 308. The second sealing ring 308 is compressed between the inner wall of the circular ring 305 and the outer walls of the connecting ring 301 and the connecting pipe 303 to form a second external seal. A locking block 306 is fixedly connected to the top of the inner wall of the circular ring 305. A locking groove 307 that mates with the locking block 306 is opened on the outer wall of the connecting pipe 303. The locking groove 307 is L-shaped. The guide groove and the slot 307 include a sliding section extending axially along the connecting pipe 303 and a locking section connected to the end of the sliding section and extending circumferentially. In the assembled state, the ring 305 is pushed to allow the locking block 306 to enter along the sliding section. When the locking block 306 touches the bottom, the ring 305 is rotated to screw the locking block 306 into the bottom of the inner wall of the locking section, thereby axially locking the connecting ring 301 and the connecting pipe 303. This mechanical locking structure, in which the locking block 306 and the slot 307 cooperate, ensures the stability of the pipeline connection and prevents the pipeline from falling off due to vibration. Together with the sealing ring 308, it achieves a double sealing protection effect.

[0027] Please refer to Figure 1 and Figure 7In a preferred embodiment, in order to achieve effective isolation and flexible support for the two pipelines, the low-pressure pipeline 1 and the high-pressure pipeline 2 are arranged in parallel. The rubber block 401 in the support mechanism 4 has two independent through holes for the low-pressure pipeline 1 and the high-pressure pipeline 2 to pass through respectively. The inner diameter of the two independent through holes is interference-fitted with the outer diameter of the low-pressure pipeline 1 and the high-pressure pipeline 2. Two fixing blocks 402 are symmetrically arranged on the left and right sides of the rubber block 401. The inner wall of the rubber block 401 is in close contact with the outer wall of the low-pressure pipeline 1 and the high-pressure pipeline 2, and the outer wall of the rubber block 401 is in close contact with the inner wall of the fixing block 402. The rubber block 401 completely isolates the low-pressure pipeline 1 and the high-pressure pipeline 2 from direct contact with the fixing block 402.

[0028] As a preferred embodiment, please refer to Figure 7 To achieve height adjustment and stable installation of the support structure, a through hole is provided on the connecting block 403. The connecting block 403 is locked and fixed by bolts that pass through the through hole and are screwed into the top of the fixing block 402. The bottom outer wall of the fixing block 402 is provided with external threads, and the top inner wall of the base 404 is provided with an internal thread groove that matches the external threads. The fixing block 402 is rotated and screwed into the base 404 to adjust its height and fix it. The rubber plate 405 is fixed to the bottom surface of the base 404 by integral vulcanization molding. The surface of the rubber plate 405 is provided with anti-slip texture.

[0029] As a preferred embodiment, in order to improve the durability of the sealing components and the versatility of the connection, the sealing ring 308 is made of aging-resistant EPDM rubber. The inner diameter of the ring 305 is slightly smaller than the outer diameter of the sealing ring 308 to form an interference seal. The sealing ring 302 is made of fluororubber. The flange 304 has several mounting through holes distributed around its edge. The flange 304 is used to fix and connect to the interface flange of an external compressor, condenser or evaporator through a bolt assembly.

[0030] Working principle: When the car air conditioning system is running, the compressor compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant is transported to the condenser for heat dissipation through the high-pressure pipe 2. After being condensed by the condenser, the liquid refrigerant enters the evaporator through the throttling device to absorb heat and vaporize. The vaporized low-temperature, low-pressure gaseous refrigerant flows back to the compressor through the low-pressure pipe 1 for the next cycle. During this process, the double sealing structure of the connecting mechanism 3 ensures that there is no leakage between the high-pressure pipe 2 and the low-pressure pipe 1 when the refrigerant is being transported. During pipeline installation, multiple connecting pipes 303 are first fixed to the corresponding interfaces of the compressor, condenser, and evaporator via flanges 304. Then, the connecting rings 301 at the ends of the low-pressure pipe 1 and the high-pressure pipe 2 are slid into the outer wall of the corresponding connecting pipe 303. At this time, the two sealing rings 302 on the outer wall of the connecting pipe 303 enter the inner wall of the connecting ring 301 and form the first internal seal. Then, the ring 305 sliding on the outer wall of the connecting ring 301 is pushed. The ring 305 drives the locking block 306 on the inner wall to move along the sliding section of the groove 307 on the outer wall of the connecting pipe 303. When the locking block 306 touches the bottom, the ring 305 is manually rotated. The locking section structure of the groove 307 is used to lock the connecting ring 301 and the connecting pipe 303. At the same time, the inner wall of the ring 305 tightly presses the sealing ring 308 set at the connection and forms the second external seal. Even if the inner sealing ring 302 is damaged, the sealing ring 308 can effectively intercept the leaked refrigerant. During pipeline fixing and vehicle operation, the support mechanism 4 plays a shock absorption and protection role. First, the rubber block 401 is wrapped around the middle outer wall of the low-pressure pipeline 1 and the high-pressure pipeline 2. Then, the rubber block 401 is clamped by two fixing blocks 402 and locked by the connecting block 403 at the top. Finally, the entire structure is threadedly fixed to the inner wall of the car by the base 404. The rubber plate 405 at the bottom of the base 404 works together with the rubber block 401 that wraps the pipeline to completely isolate the low-pressure pipeline 1 and the high-pressure pipeline 2 from direct hard contact with the vehicle body, effectively absorbing the vibration generated by the vehicle's operation and preventing the pipeline from deforming or breaking due to long-term vibration.

Claims

1. A high-sealing automotive air conditioning high and low pressure piping system, comprising: Low-pressure pipeline (1), high-pressure pipeline (2), connecting mechanism (3) provided at both ends of the low-pressure pipeline (1) and the high-pressure pipeline (2), and support mechanism (4) provided on the outer wall of the low-pressure pipeline (1) and the outer wall of the high-pressure pipeline (2); The connecting mechanism (3) is characterized in that it includes a connecting ring (301) fixedly connected to the end of the low-pressure pipeline (1) and the end of the high-pressure pipeline (2), a connecting pipe (303) is slidably connected to the inner wall of the connecting ring (301), a flange (304) is fixedly connected to one end of the connecting pipe (303) away from the connecting ring (301), a sealing ring (302) is fixedly connected to the outer wall of the connecting pipe (303), the sealing ring (302) abuts against the inner wall of the connecting ring (301), and a circular ring (305) is slidably connected to the outer wall of the connecting ring (301). A sealing ring 2 (308) is provided on the outer wall of the connection between the connecting ring (301) and the connecting pipe (303). When the ring (305) slides to the connection between the connecting ring (301) and the connecting pipe (303), it covers the sealing ring 2 (308). A locking block (306) is fixedly connected to the top of the inner wall of the ring (305). A slot (307) is opened on the outer wall of the connecting pipe (303). When the ring (305) rotates, the locking block (306) is inserted into the bottom of the inner wall of the slot (307) to fix the connecting ring (301) and the connecting pipe (303). The support mechanism (4) includes a rubber block (401) wrapped around the outer wall of the low-pressure pipe (1) and the outer wall of the high-pressure pipe (2). The outer wall of the rubber block (401) is provided with two fixing blocks (402). The top outer walls of the two fixing blocks (402) are fixedly connected by a connecting block (403). The bottom outer walls of the two fixing blocks (402) are threadedly connected to a base (404). The bottom end of the base (404) is fixedly connected to a rubber plate (405).

2. The high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The slot (307) is constructed as an L-shaped guide groove. The slot (307) includes a sliding section extending axially along the connecting pipe (303) and a locking section connected to the end of the sliding section and extending in the circumferential direction. The block (306) enters through the sliding section and screws into the locking section.

3. The high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, Two sealing rings (302) are fixedly connected to the outer wall of the connecting pipe (303). The two sealing rings (302) are arranged at intervals along the axial direction of the connecting pipe (303), and both sealing rings (302) are located between the inner wall of the connecting ring (301) and the outer wall of the connecting pipe (303).

4. The high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, Two fixing blocks (402) are symmetrically arranged on the left and right sides of the rubber block (401). The inner wall of the rubber block (401) is in close contact with the outer wall of the low-pressure pipe (1) and the high-pressure pipe (2), and the outer wall of the rubber block (401) is in close contact with the inner wall of the fixing block (402).

5. A high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The connecting block (403) has a through hole, and the connecting block (403) locks and fixes the two fixing blocks (402) by a bolt that passes through the through hole and is screwed into the top of the fixing block (402).

6. The high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The bottom outer wall of the fixing block (402) is provided with an external thread, and the top inner wall of the base (404) is provided with an internal thread groove that matches the external thread. The fixing block (402) is rotated into the base (404) to adjust its height and fix it.

7. A high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The rubber sheet (405) is fixed to the bottom surface of the base (404) by integral vulcanization molding, and the surface of the rubber sheet (405) is provided with anti-slip texture.

8. A high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The low-pressure pipe (1) and the high-pressure pipe (2) are arranged in parallel. The rubber block (401) has two independent through holes for the low-pressure pipe (1) and the high-pressure pipe (2) to pass through respectively. The inner diameter of the independent through hole is interference-fitted with the outer diameter of the pipe.

9. A high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The second sealing ring (308) is made of aging-resistant EPDM rubber. The inner diameter of the ring (305) is slightly smaller than the outer diameter of the second sealing ring (308) to form an interference seal.

10. A high-sealing automotive air conditioning high and low pressure pipeline according to claim 1, characterized in that, The flange (304) has several mounting through holes distributed around its edge. The flange (304) is used to be fixedly connected to the interface flanges of the external compressor, condenser and evaporator by means of bolt assembly.

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