Air conditioner pipe with anti-rotation flange

Abstract

The invention provides an air conditioner pipe with an anti-rotation flange, and belongs to the technical field of automobile parts. The pressing plate serves as a flange and is connected with the pipe end of the air conditioner pipe, the flange is provided with the clamping opening with the opening, the pipe end of the air conditioner pipe is thickened to form the diameter expanding part, the flange is provided with the installation face, the clamping opening is perpendicular to the installation face, and the inner side wall of the clamping opening is provided with the tooth grooves perpendicular to the installation face. Through the arrangement of the tooth grooves, when the expanding part of the air conditioner pipe is extruded into the bayonet, the outer side wall of the expanding part can be extruded through the tooth grooves so that the expanding part can be plastically deformed, circumferential limiting between the air conditioner pipe and the flange is achieved through mutual limiting of the deformation parts on the expanding part and the tooth grooves, and therefore the anti-rotation requirement is met; the air conditioner pipe and the flange are more stable and reliable after being connected, the problem of trend deviation or sealing leakage caused by mutual deflection of the air conditioner pipe and the flange is solved, the service life of a pipeline of a vehicle-mounted air conditioner system is longer, and the using effect is better.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to an air conditioning pipe with an anti-rotation flange. Background Technology

[0002] As people's demands for automotive comfort increase, automotive air conditioning systems have become a standard feature in cars. These systems typically include high and low pressure pipes, which provide a flow path for the air conditioning medium. Therefore, ensuring the reliable installation of these high and low pressure pipes is crucial for the normal operation of the automotive air conditioning system.

[0003] Currently, most automotive air conditioning systems on the market have connectors at the ends of their high and low pressure pipes. These connectors are inserted into corresponding mating holes to connect the pipes. To improve the installation stability of the high and low pressure pipes, pressure plates are usually installed at the ends to hold the connectors in place and prevent them from coming loose during use. Furthermore, for easier installation, the pressure plate is usually first fitted onto the connector, acting as a flange for the air conditioning pipe. The flange is then simply screwed onto the corresponding mating structure, making the process even more convenient. The existing flange structure used as the pipe end connector of an air conditioning pipe is as disclosed in patent CN222246769U, which is a pressure plate in a pipe assembly connected to a thermal expansion valve. In this case, the pressure plate has a limiting hole for limiting the low-pressure pipe. Part of the low-pressure pipe is coaxially inserted into the limiting hole. Furthermore, a limiting groove is provided on the pressure plate at one end of the limiting hole, which is aligned with the axis of the limiting hole. The limiting groove communicates with the limiting hole, and the diameter of the limiting groove is larger than the diameter of the limiting hole. The front end of the low-pressure sealing head of the low-pressure pipe is pressed against the inner wall of the limiting groove, so that the pressure plate can press the low-pressure sealing head of the low-pressure pipe through the limiting groove, thereby preventing the low-pressure pipe from falling off in the opposite direction and achieving stable installation of the low-pressure pipe. Additionally, the other end of the pressure plate has an elastic part for clamping the high-pressure pipe. This elastic part has an elastic opening, and its inner diameter matches the outer diameter of the high-pressure pipe. During installation, the high-pressure pipe enters the elastic part through the elastic opening, and is then clamped in place, thus achieving installation and positioning of the high-pressure pipe on the pressure plate, while also ensuring stable installation. Although the above structure can accommodate the installation of high and low-pressure pipes in automotive air conditioning systems, the pressure plate and the high-pressure pipe, as well as the pressure plate and the low-pressure pipe, are separate assembly structures with fitting gaps. Furthermore, the axial positioning between them is limited, lacking circumferential restraint. This can lead to deviations in the pipe alignment or leaks during subsequent use, affecting the normal operation of the automotive air conditioning system and consequently its performance. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention aims to provide an air conditioning pipe with an anti-rotation flange. The anti-rotation flange has an open bayonet at one end, and the inner wall of the bayonet has grooves arranged perpendicular to the mounting surface of the anti-rotation flange. The high-pressure pipe's end portion is enlarged and thickened. During installation, the high-pressure pipe is pressed into the bayonet along the direction perpendicular to the mounting surface of the anti-rotation flange. The grooves compress the enlarged portion of the high-pressure pipe, causing it to undergo plastic deformation. This achieves both an interference fit for sealing and anti-detachment, and circumferential positioning through the mutual constraint of the grooves and the plastic deformation of the high-pressure pipe. This prevents relative rotation after installation, thus preventing deviations in routing or leakage due to deflection, ensuring the normal operation of the pipeline, and guaranteeing the performance of the automotive air conditioning system.

[0005] The specific technical solution is as follows: An air conditioning pipe with an anti-rotation flange includes a pressure plate, which serves as a flange. One end of the pressure plate has an open bayonet. One end of the air conditioning pipe is inserted into the bayonet. The flange has a mounting surface, and the bayonet is arranged perpendicular to the mounting surface. Several grooves are provided on the inner wall of the bayonet in a direction perpendicular to the mounting surface. The end of the air conditioning pipe has an enlarged diameter section. The wall thickness of the enlarged diameter section is greater than that of other areas. The enlarged diameter section of the air conditioning pipe protrudes outward to form a boss on the outer wall of the air conditioning pipe. The enlarged diameter section of the air conditioning pipe and the bayonet of the flange are installed by compression. The enlarged diameter section of the air conditioning pipe is compressed into the bayonet in a direction perpendicular to the mounting surface of the flange.

[0006] In the aforementioned type of air conditioning pipe with anti-rotation flange, two sets of toothed grooves are provided in the bayonet and are symmetrically arranged in the bayonet.

[0007] In the aforementioned type of air conditioning pipe with anti-rotation flange, a retaining flange is provided on the side of the expanded diameter section of the air conditioning pipe near the pipe end, and a groove communicating with the bayonet is coaxially provided on the flange at the edge of the bayonet end, and the groove cooperates with the retaining flange.

[0008] In the aforementioned air conditioning pipe with an anti-rotation flange, the connection surfaces of the groove and the bayonet are inclined guide surfaces.

[0009] The aforementioned air conditioning pipe with an anti-rotation flange further includes a compensating clamping ring, which is disposed on the flange and located at the groove opening. One side of the compensating clamping ring extends into the groove, and the side of the compensating clamping ring near the groove opening deforms and covers the side of the retaining edge away from the bayonet opening.

[0010] In the aforementioned air conditioning pipe with an anti-rotation flange, the compensating compression ring includes a connecting part and a deformation part. One side of the connecting part is connected to the groove opening of the recess, and the other end of the connecting part extends toward the recess. The deformation part is disposed on the end of the connecting part that extends into the recess.

[0011] In the aforementioned air conditioning pipe with an anti-rotation flange, the deformable part has an arched structure, with one end of the deformable part away from the connecting part bending towards the bayonet, and the other end of the deformable part bending towards the bayonet also extending towards the center of the bayonet.

[0012] In the aforementioned type of air conditioning pipe with anti-rotation flange, a concave deformation notch is provided on the outer edge of the side of the flange away from the expanded diameter section, and the end of the deformation section bent towards the bayonet direction enters into the deformation notch.

[0013] The positive effects of the above technical solution are: The aforementioned air conditioning pipe with anti-rotation flange achieves this by thickening the pipe end to form an expanded diameter section, and then connecting it to the flange via an open bayonet. One side of the flange is the mounting surface, and the inner wall of the bayonet has several grooves arranged perpendicular to the mounting surface. This forces the expanded diameter section of the air conditioning pipe into the bayonet, and the grooves compress the outer wall of the expanded diameter section, causing it to undergo plastic deformation. This allows the deformed portion of the expanded diameter section and the grooves to mutually restrict each other, achieving circumferential positioning between the air conditioning pipe and the flange, thus preventing rotation. Furthermore, the thickening of the expanded diameter section ensures the structural strength of the connection between the air conditioning pipe and the flange, making the connection more reliable and stable. It also prevents deviations in routing or leaks caused by mutual deflection between the air conditioning pipe and the flange, ensuring the normal operation of the vehicle's air conditioning system piping. Attached Figure Description

[0014] Figure 1 This is a structural diagram of an embodiment of an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 2 This is a cross-sectional view of an embodiment of an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 3 This is a structural diagram of a flange for an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 4 This is a structural diagram of an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 5 This is a cross-sectional view of an air conditioning pipe with an anti-rotation flange and a compensating clamping ring according to the present invention. Figure 6 for Figure 5 Enlarged view of section A.

[0015] In the attached diagram: 1. Flange; 11. Mounting surface; 12. Bayonet; 13. Groove; 14. Guide surface; 15. Compensating clamping ring; 121. Gear; 151. Connecting part; 152. Deformation part; 2. Air conditioning pipe; 21. Expanded diameter part; 22. Flange; 221. Deformation notch. Detailed Implementation

[0016] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 6 The technical solutions provided by this invention are described in detail, but the following content is not intended to limit this invention.

[0017] Figure 1 This is a structural diagram of an embodiment of an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 2 This is a cross-sectional view of an embodiment of an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 3 This is a structural diagram of a flange for an air conditioning pipe with an anti-rotation flange according to the present invention; Figure 4 This is a structural diagram of an air conditioning pipe with an anti-rotation flange according to the present invention. Figures 1 to 4 As shown, the air conditioning pipe with anti-rotation flange provided in this embodiment includes: a pressure plate. At this time, the pressure plate is used as a flange 1 to press the air conditioning pipe 2. Furthermore, one end of the pressure plate is provided with a bayonet 12 with an opening. One end of the air conditioning pipe 2 is inserted into the bayonet 12. The installation of the end of the air conditioning pipe 2 is achieved through the pressure plate. That is, the end of the air conditioning pipe 2 can be installed through the flange 1, which facilitates the disassembly and assembly of the air conditioning pipe 2.

[0018] Specifically, flange 1 has a mounting surface 11. The bayonet 12 is arranged perpendicular to the mounting surface 11, allowing the mounting surface 11 to contact and press against the corresponding mating structure when the end of the air conditioning pipe 2 is subsequently installed onto the mating structure via flange 1. Furthermore, several grooves 121 are provided on the inner wall of the bayonet 12 in a direction perpendicular to the mounting surface 11, with the grooves 121 arranged in the same direction as the bayonet 12. This provides conditions for the air conditioning pipe 2 to be pressed into the bayonet 12, resulting in plastic deformation on the outer wall of the air conditioning pipe 2 through the grooves 121. At this time, multiple limiting teeth are formed on the inner wall of the bayonet 12 through the grooves 121, providing conditions for circumferential limiting when mating with the end of the air conditioning pipe 2. Furthermore, the air conditioning pipe 2 has an enlarged diameter section 21 at its end. The wall thickness of the enlarged diameter section 21 is greater than that of other areas, allowing it to undergo plastic deformation. This provides the conditions for subsequent circumferential positioning through the plastically deformed portion engaging with the toothed groove 121. Moreover, the enlarged diameter section 21 protrudes outward to form a boss on the outer wall of the air conditioning pipe 2. This means that the increased wall thickness of the enlarged diameter section 21 does not affect its inner diameter, ensuring sufficient internal flow area and preventing any impact on flow rate. Furthermore, the expanded diameter section 21 of the air conditioning pipe 2 and the bayonet 12 of the flange 1 are installed by compression. The expanded diameter section 21 of the air conditioning pipe 2 is compressed into the bayonet 12 along a direction perpendicular to the mounting surface 11 of the flange 1. The groove 121 compresses the expanded diameter section 21 of the air conditioning pipe 2, causing plastic deformation of the outer wall of the expanded diameter section 21. The plastic deformation of the expanded diameter section 21 and the groove 121 mutually restrict each other, thereby achieving circumferential positioning of the flange 1 and the air conditioning pipe 2. This prevents rotation between the air conditioning pipe 2 and the flange 1, avoiding the problems of deviation or sealing leakage caused by deflection in the existing structure, ensuring installation reliability and the performance of the automotive air conditioning system. It is worth noting that since the structure of the expanded diameter section 21 of the air conditioning pipe 2 that mates with the groove 121 does not appear during the processing of the air conditioning pipe 2 itself, there is no need to process it separately. Instead, it can be obtained directly by interference extrusion during subsequent assembly. The structure is simple, with fewer processing steps, simpler process, lower cost, and no assembly gap problem. The stability after connection is higher and more reliable.

[0019] Specifically, the bayonet 12 has two sets of symmetrically arranged grooves 121, so that when the expanded diameter section 21 of the air conditioning pipe 2 is squeezed into the bayonet 12, there are corresponding grooves 121 on both sides of the expanded diameter section 21 to cooperate in the squeezing, thereby ensuring that the expanded diameter section 21 is subjected to uniform force and will not have the problem of installation position deviation. This not only increases the limiting points and increases the limiting reliability, but also improves the accuracy of the position of the air conditioning pipe 2 installed on the flange 1, making the structural design more reasonable.

[0020] More specifically, a retaining flange 22 is provided on the side of the expanded diameter section 21 of the air conditioning pipe 2 near the pipe end. Preferably, the retaining flange 22, the air conditioning pipe 2, and the expanded diameter section 21 are integrally formed, resulting in higher structural strength and stronger load-bearing capacity. In addition, a groove 13 communicating with the bayonet 12 is coaxially provided on the flange 1 at one end of the bayonet 12. The groove 13 cooperates with the retaining flange 22, so that when the end of the air conditioning pipe 2 is pressed by the flange 1, the retaining flange 22 is embedded in the groove 13, and the expanded diameter section 21 is located in the bayonet 12. The cooperation between the retaining flange 22 and the groove 13 achieves axial restriction of the air conditioning pipe 2 by the flange 1, ensuring the reliability of the air conditioning pipe 2 and the flange 1 when they are in contact.

[0021] More specifically, the connecting surface between the groove 13 and the bayonet 12 is an inclined guide surface 14. This is achieved through chamfering, which increases the diameter of the bayonet 12. This allows the expanded diameter portion 21 of the air conditioning pipe 2 to be guided by the inclined surface when pressed into the bayonet 12 in a direction perpendicular to the mounting surface 11, improving the smoothness of the pressing process and resulting in a more rational structural design. It is worth noting that a press-fitting head can be used when pressing the expanded diameter portion 21 of the air conditioning pipe 2 into the bayonet 12. This press-fitting head is a single-piece structure with a first pressing hole corresponding to the opening. Simultaneously, a second pressing hole corresponding to other air conditioning pipes 2 is also provided on the press-fitting head, ensuring that the center distance between the first and second pressing holes remains consistent. This guarantees that the center distance between different air conditioning pipes 2 on the product press-fitted by the press-fitting head remains consistent and unchanged, improving assemblability. Furthermore, when using the press head for press fitting, the end of the air conditioning pipe 2 is inserted into the first press hole, and the opening of the first press hole abuts against the retaining edge 22. By pressing the retaining edge 22 with the press head, the expanded diameter part 21 of the air conditioning pipe 2 is pressed into the bayonet 12, thus meeting the press fitting requirements.

[0022] Figure 5 This is a cross-sectional view of an air conditioning pipe with an anti-rotation flange and a compensating clamping ring according to the present invention. Figure 6 for Figure 5 An enlarged view of section A. (See image below.) Figure 5 and Figure 6As shown, a compensating compression ring 15 is also provided on the flange 1 at the opening of the groove 13. At this time, one side of the compensating compression ring 15 extends into the groove 13, and the side of the compensating compression ring 15 extending into the groove 13 does not extend to the center of the groove 13, so that there is enough space inside the compensating compression ring 15 to allow the enlarged diameter portion 21 of the air conditioning pipe 2 and the retaining edge 22 to pass through, avoiding affecting the initial installation of the air conditioning pipe 2 on the flange 1. Furthermore, when the compensating compression ring 15 presses the enlarged diameter portion 21 of the air conditioning pipe 2 into the bayonet 12 by the press-fitting head, and at the same time, when the retaining edge 22 enters the groove 13, the side of the compensating compression ring 15 near the opening of the groove 13 deforms and covers the side of the retaining edge 22 away from the bayonet 12, that is, the compensating compression ring 15 forms a filling on the side of the retaining edge 22 away from the bayonet 12. At this time, due to the pressing action, when the force is applied to the air conditioning pipe 2 through the retaining edge 22, the expanded diameter part 21 of the air conditioning pipe 2 and the inner wall of the bayonet 12 are squeezed and deformed, requiring a very large force, which also results in the retaining edge 22 bearing a large force. As a result, when the retaining edge 22 is pushed by the pressing head, the retaining edge 22 itself will also have a small deformation problem, which will cause the retaining edge 22 to be slightly thinned. Therefore, when the retaining edge 22 is pressed into the groove 13, when the pressing head contacts the mounting surface 11 of the flange 1, the side of the retaining edge 22 near the expanded diameter part 21 does not completely abut against the connecting surface of the groove 13 and the bayonet 12. This means that when the air conditioning pipe 2 is subsequently pressed by the flange 1, there is still a risk of axial movement of the air conditioning pipe 2. The compensating clamping ring 15 can continue to be squeezed into the groove 13 under the action of the clamping head. It can not only continue to push the stop 22 so that the stop 22 is close to the connection surface of the groove 13 and the bayonet 12, but also form a limit on the side of the stop 22 away from the bayonet 12. It can both fill the gap and limit the end, ensuring that the air conditioning pipe 2 will not move axially relative to the flange 1, and the installation reliability is higher.

[0023] More specifically, the compensating clamping ring 15 includes a connecting part 151 and a deformable part 152. One side of the connecting part 151 is connected to the groove of the recess 13, and the other end of the connecting part 151 extends into the recess 13. The deformable part 152 is disposed on the end of the connecting part 151 that extends into the recess 13. Preferably, the connecting part 151, the deformable part 152 and the flange 1 are an integral structure, which improves the strength of the connection between the compensating clamping ring 15 and the flange 1, and provides a condition for the deformable part 152 of the compensating clamping ring 15 to press against the retaining edge 22 after deformation and restrict the retaining edge 22 within the recess 13.

[0024] More specifically, the deformable part 152 has an arched structure. The end of the deformable part 152 away from the connecting part 151 bends towards the bayonet 12. At the same time, the end of the deformable part 152 that bends towards the bayonet 12 also extends towards the center of the bayonet 12, so that the end of the deformable part 152 connected to the connecting part 151 can arch up. This allows the deformable part 152 to have enough material to fill the gap between the retaining edge 22 and the groove 13 when the projected area of ​​the mounting surface 11 is small. This avoids the problem that the deformable part 152 occupies too much space in the projected area of ​​the mounting surface 11, which would prevent the retaining edge 22 from being pressed into the groove 13. It also allows the deformable part 152 to deform when it is squeezed and fill the gap between one side of the retaining edge 22 and the connecting surface of the groove 13 and the bayonet 12. In addition to satisfying the filling limit, it also facilitates the installation of the air conditioning pipe 2 on the flange 1.

[0025] More specifically, a concave deformation notch 221 is provided on the outer edge of the side of the retaining flange 22 away from the expanded diameter portion 21. The deformation notch 221 forms a recessed space on the side of the retaining flange 22 away from the expanded diameter portion 21, so that when the clamping head pushes against the retaining flange 22 later, the clamping head can push against the part of the retaining flange 22 without the deformation notch 221, ensuring that it can act on the retaining flange 22 to press the expanded diameter portion 21 into the bayonet 12, and so that a gap is formed between the clamping head and the outer edge of the retaining flange 22 through the deformation notch 221. At the same time, the clamping head also contacts and squeezes the deformed portion 152, so that the end of the deformed portion 152 bent towards the bayonet 12 can enter the gap formed between the clamping head and the outer edge of the retaining flange 22 due to the deformation notch 221 as soon as possible. This realizes the initial engagement between the compensating clamping ring 15 and the retaining flange 22, and provides conditions for the compensating clamping ring 15 to squeeze the retaining flange 22 and restrict the reverse movement of the retaining flange 22 later. In addition, as the stop 22 continues to be pushed, the expanding diameter portion 21 is pressed into the bayonet 12, and the clamping head will continue to press down the deformation portion 152. Since the deformation portion 152 is an arched structure, when the clamping head continues to press down the deformation portion 152, the deformation portion 152 can extend into the deformation notch 221, thereby filling the deformation notch 221. After the deformation notch 221 is filled, the stop 22 continues to move towards the bayonet 12, so that one side of the stop 22 abuts against the connecting surface of the groove 13 and the bayonet 12, ensuring that both ends of the stop 22 are restricted, avoiding axial movement problems caused by gaps during assembly after subsequent installation, and making the installation more reliable. It is worth noting that the internal volume of the groove 13 is larger than that of the retaining edge 22. This allows the clamping head to be pressed down further after the retaining edge 22 is pressed against the connecting surface of the groove 13 and the bayonet 12, so that the clamping head is pressed tightly against the mounting surface 11 of the flange 1. This ensures that after the retaining edge 22 is fully inserted into the groove 13, there is still a gap between the outer wall of the retaining edge 22 and the inner wall of the groove 13. This allows excess material of the compensating clamping ring 15 to be pressed into the aforementioned gap, ensuring that the compensating clamping ring 15 does not protrude from the mounting surface 11 and affect the subsequent installation of the flange 1. This results in a more reasonable structural design.

[0026] The air conditioning pipe with anti-rotation flange provided in this embodiment includes a pressure plate; the pressure plate serves as a flange 1 and is connected to the end of the air conditioning pipe 2. The flange 1 has a bayonet 12 with an opening. The end of the air conditioning pipe 2 is thickened to form an expanded diameter section 21. Furthermore, the flange 1 has a mounting surface 11, and the bayonet 12 is arranged perpendicular to the mounting surface 11. Its inner sidewall is provided with a plurality of grooves 121 perpendicular to the mounting surface 11, so that when the expanded diameter section 21 of the air conditioning pipe 2 is squeezed into the bayonet 12, the outer sidewall of the expanded diameter section 21 can be squeezed by the grooves 121, causing it to undergo plastic deformation. The deformation is achieved by the deformation portion on the enlarged diameter section 21 mutually restricting the circumferential positioning between the air conditioning pipe 2 and the flange 1 through the mutual restriction of the groove 121, thereby meeting the anti-rotation requirement. Moreover, the deformation occurs on the thickened enlarged diameter section 21, which not only provides a sufficiently large deformation allowance, but also maintains the overall structural stability, making the connection between the air conditioning pipe 2 and the flange 1 more stable and reliable. There will be no deviation in the routing or sealing leakage caused by the mutual deflection of the air conditioning pipe 2 and the flange 1, ensuring the stability and reliability of the vehicle air conditioning system piping, longer service life, and better performance.

[0027] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An air conditioning pipe with an anti-rotation flange, comprising a pressure plate, the pressure plate being used as a flange, one end of the pressure plate having an open bayonet, and one end of the air conditioning pipe being inserted into the bayonet, characterized in that, The flange has a mounting surface, and the bayonet is arranged perpendicular to the mounting surface. Several grooves are provided on the inner wall of the bayonet in a direction perpendicular to the mounting surface. The end of the air conditioning pipe is provided with an enlarged diameter section. The wall thickness of the enlarged diameter section is greater than the wall thickness of other areas. The enlarged diameter section of the air conditioning pipe protrudes outward to form a boss on the outer wall of the air conditioning pipe. The enlarged diameter section of the air conditioning pipe and the bayonet of the flange are installed by compression. The enlarged diameter section of the air conditioning pipe is compressed into the bayonet in a direction perpendicular to the mounting surface of the flange.

2. The air conditioning pipe with anti-rotation flange according to claim 1, characterized in that, The toothed grooves within the bayonet are provided in two sets and are symmetrically arranged within the bayonet.

3. The air conditioning pipe with anti-rotation flange according to claim 1, characterized in that, The enlarged diameter portion of the air conditioning pipe is provided with a retaining flange on the side near the pipe end. The flange is provided with a groove coaxially at the edge of one end of the bayonet, which communicates with the bayonet and the groove cooperates with the retaining flange.

4. The air conditioning pipe with anti-rotation flange according to claim 3, characterized in that, The connection surfaces of the groove and the bayonet are inclined guide surfaces.

5. The air conditioning pipe with anti-rotation flange according to claim 3, characterized in that, It also includes a compensating clamping ring, which is disposed on the flange and located at the opening of the groove. One side of the compensating clamping ring extends into the groove, and the side of the compensating clamping ring near the opening of the groove is deformed and covers the side of the retaining edge away from the latch.

6. The air conditioning pipe with anti-rotation flange according to claim 5, characterized in that, The compensating compression ring includes a connecting part and a deformable part. One side of the connecting part is connected to the opening of the groove, and the other end of the connecting part extends toward the groove. The deformable part is disposed on the end of the connecting part that extends into the groove.

7. The air conditioning pipe with anti-rotation flange according to claim 6, characterized in that, The deformable part has an arched structure. One end of the deformable part away from the connecting part bends toward the bayonet, and the other end of the deformable part that bends toward the bayonet also extends toward the center of the bayonet.

8. The air conditioning pipe with anti-rotation flange according to claim 7, characterized in that, A concave deformation notch is provided on the outer edge of the side of the stop away from the diameter expansion portion, and the end of the deformation portion that bends toward the bayonet direction enters the deformation notch.

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