Joint structure of air conditioner connecting pipe and air conditioner

Abstract

The application provides a joint structure of an air conditioner connecting pipe, which comprises a joint, a connecting pipe and a copper nut, the connecting pipe, the joint and / or a stop valve are connected together through the copper nut, a first sealing structure is arranged between the copper nut and the connecting pipe, a second sealing structure is arranged in the connecting pipe, and the first sealing structure and the second sealing structure are matched to avoid the contact between the connecting pipe and the copper nut and / or the joint and / or the stop valve. The joint structure of the air conditioner connecting pipe has only two sealing structures, i.e. the first sealing structure and the second sealing structure, so that the hidden danger of leakage is reduced, the requirements on the machining production and the installation operation process are reduced, the installation steps are reduced, and the production and installation efficiency is improved; through the cooperation of the first sealing structure and the second sealing structure, the sealing performance is improved, and the electrochemical corrosion caused by the contact between the connecting pipe and the copper nut and / or the joint and / or the stop valve is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, in particular, an air conditioner connecting pipe joint structure and air conditioner. BACKGROUND

[0002] The existing split air conditioner connecting pipe assembly, as shown in the drawings, is composed of a copper pipe (both ends are expanded trumpet mouths), copper nuts at both ends of the copper pipe, and a heat preservation pipe wrapped outside the copper pipe. During installation, the expanded trumpet mouths at both ends of the copper pipe are directly connected with the indoor unit single joint (copper material) and / or the outdoor unit stop valve (copper material), and then the copper nuts are tightened. Figure 1

[0003] However, due to the shortage of copper resources in China and the increasing price of copper, the use of aluminum pipes to replace copper pipes in the field of air conditioning technology is also increasingly valued. Commonly used are copper-aluminum combined pipes, that is, a pure aluminum pipe is used in the middle section of the connecting pipe, and a copper pipe section is welded at both ends, and the expanded trumpet mouth of the copper pipe section is connected with the single joint and / or the stop valve. Or, an aluminum pipe is used throughout the connecting pipe, and additional components are added at the joint to prevent the aluminum pipe from being directly connected with the single joint and / or the stop valve, thereby avoiding the electrochemical corrosion of aluminum and copper and reducing the sealing effect.

[0004] Disadvantages of the prior art:

[0005] 1. In the copper-aluminum combined pipe, the copper pipe and the aluminum pipe are connected by resistance welding or other methods, which have strict requirements on welding technology. If the welding is poor, it will directly lead to refrigerant leakage. At the same time, the copper pipe section at both ends also increases the cost.

[0006] 2. When an aluminum pipe is used throughout, additional components are needed to prevent the aluminum pipe from being directly connected with the copper material. However, the existing technology requires more components (such as patent CN201922163294.0), which requires more processing, installation, and steps, and more potential leakage risks.

[0007] Therefore, the present application is proposed. SUMMARY

[0008] The present application aims to provide an air conditioner connecting pipe joint structure and air conditioner to solve the problem that, in the prior art, if an aluminum pipe is used throughout, more components are needed to prevent the aluminum pipe from being directly connected with the copper material, which requires more processing, installation, and steps, and more potential leakage risks.

[0009] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0010] ​The application discloses a joint structure of an air conditioner connecting pipe, which comprises a joint, a connecting pipe and a copper nut, the connecting pipe, the joint and / or a stop valve are connected together through the copper nut, a first sealing structure is arranged between the copper nut and the connecting pipe, and a second sealing structure is arranged in the connecting pipe.

[0011] The joint structure of the air conditioner connecting pipe has only two sealing structures, i.e., the first sealing structure and the second sealing structure, which reduces the hidden danger of leakage, reduces the requirements on the machining production and the installation operation process, reduces the installation steps, greatly improves the production and installation efficiency, improves the sealing performance of the joint structure of the air conditioner connecting pipe through the cooperation of the first sealing structure and the second sealing structure, avoids the direct contact between the connecting pipe and the copper nut and / or the joint to cause electrochemical corrosion, and prolongs the service life.

[0012] Further, a first straight cylinder part and a second straight cylinder part are arranged on the copper nut, a necking conical surface part is arranged between the first straight cylinder part and the second straight cylinder part, a second pipe expanding part is arranged on a pipe body part of the connecting pipe, the first sealing structure comprises a ring body part, a first pipe expanding part is arranged on the ring body part, the outer side surface of the first pipe expanding part cooperates with the necking conical surface part, and the inner side surface of the first pipe expanding part cooperates with the second pipe expanding part; the outer side surface of the ring body part cooperates with the second straight cylinder part, and the inner side surface of the ring body part cooperates with the pipe body part.

[0013] The arrangement can avoid the direct contact between the aluminum alloy pipe body layer and the copper nut to cause electrochemical corrosion after the resin coating of the connecting pipe is damaged, prolongs the service life, and improves the sealing performance among the copper nut, the first sealing structure and the connecting pipe.

[0014] Further, a ring extending part is arranged on the first pipe expanding part, the ring extending part extends away from the ring body part, and the ring extending part cooperates with the first straight cylinder part.

[0015] The arrangement can further improve the sealing performance among the copper nut, the first sealing structure and the connecting pipe, and improve the installation firmness of the first sealing structure.

[0016] Further, the second sealing structure comprises an insertion body part, and the insertion body part cooperates with the inner side surface of the pipe body part of the connecting pipe.

[0017] The arrangement improves the sealing performance between the second sealing structure and the connecting pipe, and improves the installation firmness of the second sealing structure.

[0018] Further, a third pipe expanding part is arranged on the insertion body part, and the outer edge of the third pipe expanding part is arranged in abutment with the annular extending part of the first sealing structure.

[0019] The arrangement further improves the sealing performance between the second sealing structure and the connecting pipe in the horizontal direction, avoids electrochemical corrosion of the connecting pipe directly contacting the joint and / or the stop valve, improves the service life, and further improves the installation firmness of the second sealing structure.

[0020] Further, a top extending part is arranged on the third pipe expanding part, the top extending part extends towards the direction close to the insertion body part, and the top extending part is arranged as an annular body or a plurality of spaced extending parts annularly distributed on the top extending part.

[0021] The arrangement further improves the sealing performance between the second sealing structure and the connecting pipe in the vertical direction, protects the second sealing structure by the first sealing structure, avoids the second sealing structure from being wrinkled when the copper nut is screwed with the single joint and / or the stop valve, improves the service life, and makes the second sealing structure forced to be compressed and expanded outward to seal the connecting pipe under the action of the screwing force of the copper nut. On the other hand, the connecting pipe is not directly contacted with the single joint and / or the stop valve to cause electrochemical corrosion, and the service life is improved.

[0022] Further, the lower end of the top extending part abuts against the top end of the second pipe expanding part of the connecting pipe.

[0023] The arrangement further improves the sealing performance between the second sealing structure and the connecting pipe in the vertical direction, protects the second sealing structure by the first sealing structure, avoids the second sealing structure from being wrinkled when the copper nut is screwed with the single joint and / or the stop valve, and improves the service life.

[0024] Further, the connecting pipe at least includes a pipe body layer and a resin coating layer, and the resin coating layer is arranged on the outer side of the pipe body layer.

[0025] The arrangement avoids electrochemical corrosion of the pipe body layer exposed to contact with copper material, and strengthens the bending performance of the connecting pipe.

[0026] Further, the material of the first sealing structure is stainless steel or special engineering plastic, and / or the material of the second sealing structure is stainless steel or special engineering plastic.

[0027] Further, the first sealing structure is in interference fit with the inner wall of the copper nut; and / or the outer diameter of the insertion body part is smaller than the inner diameter of the connecting pipe.

[0028] The arrangement can ensure the close fit of the first sealing structure with the copper nut and the connecting pipe, and can ensure the insertion of the insertion body part into the connecting pipe and the close fit of the second sealing structure with the connecting pipe.

[0029] In a second aspect, the application provides an air conditioner using the air conditioner connecting pipe joint structure.

[0030] The air conditioner connecting pipe joint structure and the air conditioner have the following advantages over the prior art:

[0031] 1) The air conditioner connecting pipe joint structure and the air conditioner have only two sealing structures, i.e. the first sealing structure and the second sealing structure, which reduces the risk of leakage and the requirements for production, installation and operation, and reduces the installation steps, thereby greatly improving the production and installation efficiency.

[0032] 2) The air conditioner connecting pipe joint structure and the air conditioner improve the sealing performance of the air conditioner connecting pipe joint structure through the cooperation of the first sealing structure and the second sealing structure, and can avoid the direct contact between the connecting pipe and the copper nut and / or the joint to prevent electrochemical corrosion and improve the service life and reduce the replacement frequency.

[0033] 3) The air conditioner connecting pipe joint structure and the air conditioner have the top extension part arranged inside the annular extension part, so that the second sealing structure is protected by the first sealing structure and will not be wrinkled when the copper nut is screwed with the single joint and / or the stop valve, thereby improving the service life and reducing the replacement frequency; and the second sealing structure is forced to be compressed and expanded outwardly to seal the connecting pipe under the action of the tightening force of the copper nut.

[0034] 4) The air conditioner connecting pipe joint structure and the air conditioner use aluminum material with a lower price for the entire connecting pipe, thereby greatly reducing the overall cost compared with the copper pipe.

[0035] 5) The air conditioner connecting pipe joint structure and the air conditioner can complete the combination of the second sealing structure with the connecting pipe before leaving the factory; and the first sealing structure can be assembled with the copper nut before leaving the factory, so that the assembly quality is guaranteed and the loss is less likely to occur. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 This is a schematic diagram of the joint structure of an existing air conditioning connection pipe;

[0037] Figure 2 This is a schematic diagram of the overall structure of a connector structure for an air conditioning connecting pipe according to an embodiment of the present invention;

[0038] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Connector; 2. Copper nut; 21. First straight section; 22. Second straight section; 23. Constricted conical section; 3. Connecting pipe; 31. Pipe body; 32. Second expanded section; 301. Pipe body layer; 302. Resin coating; 4. Insulation sleeve; 5. First sealing structure; 51. First expanded section; 52. Annular body; 53. Annular protrusion; 6. Second sealing structure; 61. Inserted body; 62. Third expanded section; 63. Top protrusion. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The descriptions of "first," "second," etc., mentioned in the embodiments of the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Example 1

[0044] This embodiment describes a connector structure for an air conditioning connection pipe, such as... Figure 2 As shown, the connecting pipe structure includes a connector 1, a connecting pipe 3, and a copper nut 2. The connecting pipe 3 and the connector 1 are connected together by the copper nut 2, or the connecting pipe 3 and the shut-off valve (not shown in the figure) are connected together by the copper nut 2.

[0045] like Figure 3A first sealing structure 5 is arranged between the copper nut 2 and the connecting pipe 3, and a second sealing structure 6 is arranged inside the connecting pipe 3, and the first sealing structure 5 and the second sealing structure 6 cooperate to avoid the connecting pipe 3 from contacting the copper nut 2 and / or the joint 1 and / or the stop valve.

[0046] The joint structure of the air conditioner connecting pipe and the sealing structure have only two parts, i.e., the first sealing structure 5 and the second sealing structure 6, which reduces the risk of leakage and the requirements for the production and installation process, reduces the installation steps, and greatly improves the production and installation efficiency. The first sealing structure 5 and the second sealing structure 6 cooperate to improve the sealing performance of the joint structure of the air conditioner connecting pipe, so that the copper nut 2, the first sealing structure 5, the connecting pipe 3, and the second sealing structure 6 are tightly combined, the second sealing structure 6 is prevented from being wrinkled to improve the sealing effect, the first sealing structure 5 prevents the aluminum alloy pipe body layer 301 from directly contacting the copper nut 2 to cause electrochemical corrosion after the resin coating 302 of the connecting pipe 3 is damaged, the second sealing structure 6 prevents the second pipe expanding part 32 of the connecting pipe 3 from directly contacting the stop valve and / or the single joint 1 to cause electrochemical corrosion, and the service life is improved.

[0047] Specifically, the material of the first sealing structure 5 is not limited, and the material of the second sealing structure 6 is not limited.

[0048] Specifically, the material of the first sealing structure 5 is stainless steel or special engineering plastic, and / or the material of the second sealing structure 6 is stainless steel or special engineering plastic.

[0049] The material of the first sealing structure 5 can be stainless steel, and the material of the first sealing structure 5 can also be special engineering plastic.

[0050] Preferably, in the embodiment, the material of the first sealing structure 5 is stainless steel. Stainless steel has the properties of stainless, corrosion resistance, and heat resistance, and the hardness of stainless steel is higher than that of aluminum alloy, so that the first sealing structure 5 has the properties of stainless, corrosion resistance, and heat resistance, and the hardness of stainless steel is higher than that of aluminum alloy.

[0051] Specifically, the material of the second sealing structure 6 is not limited. The material of the second sealing structure 6 can be stainless steel, and the material of the second sealing structure 6 can also be special engineering plastic.

[0052] Preferably, in the embodiment, the material of the second sealing structure 6 is special engineering plastic. Special engineering plastic has high comprehensive performance and unique and excellent physical properties, so that the second sealing structure 6 has unique and excellent physical properties.

[0053] More specifically, the material of the second sealing structure 6 can be polyetheretherketone (PEEK) among special engineering plastics, the material of the second sealing structure 6 can also be polytetrafluoroethylene (Teflon) among special engineering plastics, or polyphenylene sulfide among special engineering plastics.

[0054] Preferably, in this embodiment, the material of the second sealing structure 6 can be polyetheretherketone (PEEK), a special engineering plastic. PEEK is a high-performance special engineering plastic with many significant advantages compared to other special engineering plastics. PEEK has excellent heat resistance, electrical insulation, good self-lubricating properties, chemical corrosion resistance, flame retardancy, peel resistance, and wear resistance.

[0055] The copper nut 2 is connected to the single connector 1 and / or the shut-off valve.

[0056] Specifically, such as Figure 3 As shown, a first cylindrical portion 21 and a second cylindrical portion 22 are provided on the copper nut 2. The first cylindrical portion 21 has an internal threaded structure. The diameter of the second cylindrical portion 22 is smaller than the diameter of the first cylindrical portion 21. A constricted tapered portion 23 is provided between the first cylindrical portion 21 and the second cylindrical portion 22. A second expanded portion 32 is provided on the pipe body portion 31 of the connecting pipe 3. The first sealing structure 5 includes an annular body portion 52. A first expanded portion 51 is provided on the annular body portion 52. The outer surface of the first expanded portion 51 mates with the constricted tapered portion 23, and the inner surface of the first expanded portion 51 mates with the second expanded portion 32. The outer surface of the annular body portion 52 mates with the second cylindrical portion 22, and the inner surface of the annular body portion 52 mates with the pipe body portion 31.

[0057] This design, on the one hand, can prevent the aluminum alloy tube body layer 301 from directly contacting the copper nut 2 and causing electrochemical corrosion after the resin coating 302 of the connecting pipe 3 is damaged, thus improving its service life; on the other hand, it improves the sealing performance between the copper nut 2, the first sealing structure 5 and the connecting pipe 3.

[0058] This setup ensures a tight fit between the first sealing structure 5, the copper nut 2, and the connecting pipe 3.

[0059] The first sealing structure 5 is inserted into the copper nut 2, and the first expanding tube 51 and the constricted conical part 23, and the annular body part 52 and the inner side of the second straight tube part 22 of the copper nut 2 form an interference fit, thus completing the fixed installation of the first sealing structure 5.

[0060] More specifically, such as Figure 3As shown, the second pipe expanding part 32 is arranged on the top of the connecting pipe 3, and the second pipe expanding part 32 is in the shape of a horn; the first pipe expanding part 51 is arranged on the top of the annular body part 52, and the first pipe expanding part 51 is in the shape of a horn.

[0061] Specifically, as shown in the figure, the annular extending part 53 is arranged on the first pipe expanding part 51, and the annular extending part 53 extends towards the direction away from the annular body part 52, and the annular extending part 53 cooperates with the first straight cylinder part 21. Figure 3

[0062] Specifically, as shown in the figure, the annular extending part 53 is arranged on the top of the first pipe expanding part 51. Figure 3

[0063] Specifically, as shown in the figure, the second sealing structure 6 comprises an insertion body part 61, and the insertion body part 61 cooperates with the inner side surface of the pipe body part 31 of the connecting pipe 3. Figure 3 This arrangement can improve the sealing performance between the second sealing structure 6 and the connecting pipe 3 in the horizontal direction, and can also improve the installation firmness of the second sealing structure 6.

[0064] More specifically, the outer diameter of the insertion body part 61 is smaller than the inner diameter of the connecting pipe 3.

[0065] This arrangement can not only realize the insertion of the insertion body part 61 into the connecting pipe 3, but also can ensure the close cooperation between the second sealing structure 6 and the connecting pipe 3.

[0066] Specifically, the first sealing structure 5 is in interference fit with the inner wall of the copper nut 2; and / or the outer diameter of the insertion body part 61 is smaller than the inner diameter of the connecting pipe 3.

[0067] Preferably, in this embodiment, the first sealing structure 5 is in interference fit with the inner wall of the copper nut 2, and the outer diameter of the insertion body part 61 is smaller than the inner diameter of the connecting pipe 3.

[0068] Specifically, the first sealing structure 5 is in interference fit with the inner wall of the copper nut 2.

[0069] Specifically, as shown in the figure, a third pipe expanding part 62 is arranged on the insertion body part 61, and the outer edge of the third pipe expanding part 62 is arranged in close contact with the annular extending part 53 of the first sealing structure 5.

[0070] Figure 3 Specifically, as shown in the figure, a third pipe expanding part 62 is arranged on the insertion body part 61, and the outer edge of the third pipe expanding part 62 is arranged in close contact with the annular extending part 53 of the first sealing structure 5.

[0071] Specifically, as shown in the figure, a third pipe expanding part 62 is arranged on the insertion body part 61, and the outer edge of the third pipe expanding part 62 is arranged in close contact with the annular extending part 53 of the first sealing structure 5. Figure 3 ​​​As shown in the drawings, a top protruding portion 63 is arranged on the third pipe expanding portion 62, the top protruding portion 63 extends towards the direction close to the insertion body portion 61, the top protruding portion 63 is arranged as a ring body or multiple spaced protrusions distributed in a ring shape on the top protruding portion 63, the lower end of the top protruding portion 63 abuts against the top end of the connecting pipe 3.

[0072] This arrangement can further improve the sealing performance between the second sealing structure 6 and the connecting pipe 3 in the vertical direction, on the one hand, and can avoid direct contact between the connecting pipe 3 and the joint 1 and / or the stop valve to produce electrochemical corrosion and improve the service life, on the other hand. In addition, it further improves the installation firmness of the second sealing structure 6 in the connecting pipe 3.

[0073] Specifically, as shown in the drawings, the third pipe expanding portion 62 is arranged at the top of the insertion body portion 61, and the third pipe expanding portion 62 is in a trumpet shape. A top protruding portion 63 is arranged at the top of the third pipe expanding portion 62. Figure 3

[0074] Specifically, the form of the top protruding portion 63 is not limited. The top protruding portion 63 can be arranged as a ring body, or the top protruding portion 63 can be arranged as multiple spaced protrusions uniformly distributed along the central axis of the second sealing structure 6 at the top of the third pipe expanding portion 62.

[0075] Preferably, in the present embodiment, the top protruding portion 63 can be arranged as a ring body.

[0076] This arrangement can improve the installation firmness of the second sealing structure 6 on the connecting pipe 3, on the one hand, and can improve the sealing performance between the second sealing structure 6 and the connecting pipe 3, on the other hand.

[0077] Specifically, as shown in the drawings, the top protruding portion 63 extends vertically towards the direction close to the insertion body portion 61, and the outer side of the top protruding portion 63 is arranged in abutment with the inner side of the ring-shaped protruding portion 53. Figure 3

[0078] The top protruding portion 63 cooperates with the ring-shaped protruding portion 53, first, further improving the sealing performance of the first sealing structure 5 and the second sealing structure 6, so that the copper nut 2, the first sealing structure 5, the connecting pipe 3 and the second sealing structure 6 are tightly combined, ensuring that the second sealing structure 6 will not be wrinkled to improve the sealing effect; second, it can avoid direct contact between the aluminum alloy pipe body layer 301 and the copper nut 2 after the resin coating 302 of the connecting pipe 3 is damaged to produce electrochemical corrosion, third, it can avoid direct contact between the second pipe expanding portion 32 of the connecting pipe 3 and the stop valve and / or the single joint 1 to produce electrochemical corrosion, thereby improving the service life.

[0079] ​​Specifically, as shown in Figure 3 All or part of the top extension 63 is arranged inside the annular extension 53.

[0080] This arrangement protects the second sealing structure 6 from the first sealing structure 5, and prevents the second sealing structure 6 from being wrinkled when the copper nut 2 is screwed with the single joint 1 and / or the stop valve. At this time, the second sealing structure 6 is forced to be compressed and expanded outward, thereby achieving sealing with the connecting pipe 3. In addition, the connecting pipe 3 is not in direct contact with the single joint 1 and / or the stop valve, thereby preventing electrochemical corrosion and improving the service life.

[0081] Specifically, as shown in Figure 3 The connecting pipe 3 at least includes a pipe body layer 301 and a resin coating layer 302, and the resin coating layer 302 is arranged on the outside of the pipe body layer 301.

[0082] The arrangement of the resin coating layer 302 can prevent electrochemical corrosion of the pipe body layer 301 exposed to copper materials, and can also improve the bending performance of the connecting pipe 3.

[0083] Specifically, the number of layers of the connecting pipe 3 is not limited. The connecting pipe 3 can be a single-layer pipe, a double-layer pipe, or a multi-layer pipe.

[0084] Preferably, in this embodiment, the connecting pipe 3 is a double-layer pipe.

[0085] Specifically, as shown in Figure 2 The connecting pipe 3 includes a pipe body layer 301 and a resin coating layer 302, and the resin coating layer 302 is arranged on the outside of the pipe body layer 301.

[0086] Specifically, the material of the pipe body layer 301 of the connecting pipe 3 is not limited. The material of the pipe body layer 301 of the connecting pipe 3 can be an aluminum pipe, an aluminum alloy pipe, or a stainless steel or copper pipe.

[0087] Preferably, in this embodiment, the material of the pipe body layer 301 of the connecting pipe 3 is an aluminum alloy pipe. The material of the pipe body layer 301 of the entire connecting pipe 3 is an aluminum alloy pipe, which is much cheaper than a copper pipe.

[0088] Specifically, as shown in ​ A heat preservation sleeve 4 is arranged on the outside of the connecting pipe 3.

[0089] This arrangement can improve the heat preservation performance of the connecting pipe 3.

[0090] For the joint structure of the air conditioner connecting pipe, in addition to the joint 1, the connecting pipe 3 and the copper nut 2, other related components are also included, and the specific structure and the specific assembly relationship of the related components are prior art, which will not be described here.

[0091] In the embodiment, the installation process of the joint structure of the air conditioner connecting pipe is as follows:

[0092] Firstly, the copper nut 2 is put into the first sealing structure 5, and the first expansion pipe part 51 of the first sealing structure 5 is in interference fit with the necked taper surface part 23 and the annular body part 52 and the inner side surface of the second straight cylinder part 22 of the copper nut 2, so that the fixed installation of the first sealing structure 5 is completed.

[0093] Then, the connecting pipe 3 is inserted through the second expansion pipe part 32, so that the inner side surface of the first expansion pipe part 51 is in fit with the outer side surface of the second expansion pipe part 32 on the connecting pipe 3, and the fixed installation of the connecting pipe 3 is completed.

[0094] Then, the second sealing structure 6 is inserted into the connecting pipe 3, so that the second expansion pipe part 32 is in fit with the third expansion pipe part 62 on the second sealing structure 6, and only the top extension part 63 of the second sealing structure 6 is in butt sealing with the second expansion pipe part 32, so that the fixed installation of the second sealing structure 6 is completed.

[0095] Finally, the copper nut 2 is in butt screwing with the single joint 1 and / or the stop valve, and in the screwing process, the top extension part 63 is in butt with the second expansion pipe part 32, and both are in the annular extension part 53 of the first sealing structure 5, so that the connecting pipe 3 is not in contact with the single joint 1 and / or the stop valve, and a good sealing structure is formed.

[0096] The joint structure of the air conditioner connecting pipe in the embodiment, the annular body part 52, the first expansion pipe part 51 and the annular extension part 53 of the first sealing structure 5, the insertion body part 61, the third expansion pipe part 62 and the top extension part 63 of the second sealing structure 6 are in mutual fit and common action, the parts of the first sealing structure are less, only two of the first sealing structure 5 and the second sealing structure 6, the sealing performance of the joint structure of the air conditioner connecting pipe is improved, the copper nut 2, the first sealing structure 5, the connecting pipe 3 and the second sealing structure 6 are tightly combined, it is ensured that the second sealing structure 6 will not be wrinkled to improve the sealing effect, the hidden danger of leakage is reduced, the requirements for the process production and the installation operation process are reduced, the installation steps are reduced, and the production and installation efficiency is greatly improved, the resin coating layer 302 of the connecting pipe 3 is prevented from being damaged, the aluminum alloy pipe body layer 301 is directly in contact with the copper nut 2 to produce electrochemical corrosion, the service life is improved, the second expansion pipe part 32 of the connecting pipe 3 is prevented from being directly in contact with the stop valve and / or the single joint 1 to produce electrochemical corrosion, and the service life is improved.

[0097] Embodiment 2

[0098] The present embodiment proposes an air conditioner using the joint structure of the air conditioner connection pipe as described in any one of Embodiments 1.

[0099] For the air conditioner, in addition to the joint structure of the air conditioner connection pipe, other related components such as a compressor are included, and the specific structure and assembly relationship of the related components are all prior art, which will not be described here.

[0100] The air conditioner and the joint structure of the air conditioner connection pipe have the same advantages as the prior art, which will not be described here.

[0101] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, therefore the protection scope of the present application should be limited by the scope defined by the claims.

Claims

1. A connector structure for an air conditioning connecting pipe, characterized in that, The connector structure of the air conditioner connecting pipe includes a connector (1), a connecting pipe (3), and a copper nut (2). The connecting pipe (3), the connector (1), and / or the shut-off valve are connected together by the copper nut (2). A first sealing structure (5) is provided between the copper nut (2) and the connecting pipe (3). A second sealing structure (6) is provided inside the connecting pipe (3). The first sealing structure (5) and the second sealing structure (6) cooperate with each other to prevent the connecting pipe (3) from contacting the copper nut (2) and / or the connector (1) and / or the shut-off valve. The second sealing structure (6) includes an insertion body portion (61), A third expansion tube (62) is provided on the insertion body part (61). A top protrusion (63) is provided on the third expansion tube (62), the top protrusion (63) extends toward the direction close to the insertion body (61), the top protrusion (63) is configured as an annular body or the top protrusion (63) extends out in a ring-shaped manner at multiple intervals on the top protrusion (63); The lower end of the top protrusion (63) abuts against the top end of the second expansion section (32) of the connecting pipe (3); The top protrusion (63) extends vertically toward the direction close to the insertion body (61), and the outer side of the top protrusion (63) is fitted with the inner side of the annular protrusion (53). All or part of the top protrusion (63) is disposed inside the annular protrusion (53).

2. The joint structure of an air conditioning connecting pipe according to claim 1, characterized in that, A first cylindrical portion (21) and a second cylindrical portion (22) are provided on the copper nut (2), and a constricted conical portion (23) is provided between the first cylindrical portion (21) and the second cylindrical portion (22). A second expanded portion (32) is provided on the tube body portion (31) of the connecting pipe (3). The first sealing structure (5) includes an annular body portion (52), and a first expanded portion (51) is provided on the annular body portion (52). The outer side of the first expanded portion (51) cooperates with the constricted conical portion (23), and the inner side of the first expanded portion (51) cooperates with the second expanded portion (32). The outer side of the annular body portion (52) cooperates with the second cylindrical portion (22), and the inner side of the annular body portion (52) cooperates with the tube body portion (31).

3. The joint structure of an air conditioner connecting pipe according to claim 2, characterized in that, An annular protrusion (53) is provided on the first expansion tube section (51), the annular protrusion (53) extends in a direction away from the annular body section (52), and the annular protrusion (53) cooperates with the first straight tube section (21).

4. A connector structure for an air conditioning connecting pipe according to any one of claims 1 to 3, characterized in that, The insertion body part (61) mates with the inner surface of the tube body part (31) of the connecting tube (3).

5. The joint structure of an air conditioner connecting pipe according to claim 4, characterized in that, The outer edge of the third expansion section (62) is fitted to the annular protrusion (53) of the first sealing structure (5).

6. The joint structure of an air conditioning connecting pipe according to claim 1, characterized in that, The connecting pipe (3) includes at least a pipe body layer (301) and a resin coating (302), wherein the resin coating (302) is disposed on the outside of the pipe body layer (301).

7. The joint structure of an air conditioning connecting pipe according to claim 1, characterized in that, The first sealing structure (5) is made of stainless steel or special engineering plastic; and / or the second sealing structure (6) is made of stainless steel or special engineering plastic.

8. The joint structure of an air conditioning connecting pipe according to claim 1, characterized in that, The first sealing structure (5) is interference-fitted with the inner wall of the copper nut (2); and / or the outer diameter of the insertion body (61) is smaller than the inner diameter of the connecting pipe (3).

9. An air conditioner, characterized in that, The air conditioner uses a connector structure for an air conditioning connecting pipe as described in any one of claims 1 to 8.

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