A stainless steel air conditioning pipe

Abstract

This utility model provides a stainless steel air conditioning pipe, relating to the field of air conditioning pipe technology, comprising: a straight air conditioning refrigerant pipe, wherein an air conditioning refrigerant elbow is connected to the side end of the straight air conditioning refrigerant pipe via a pipe fitting; a stainless steel outer pipe layer is provided on the outer side of the straight air conditioning refrigerant pipe, and a copper inner pipe layer is laminated on the inner side of the stainless steel outer pipe layer; the surface of the copper inner pipe layer is coated with a nano-modified coating and a PTFE inner lining layer; the pipe fitting is welded to the copper inner pipe layer via a connecting inner pipe; and a pipe clamp is fixed to the outer end of the pipe fitting. This utility model solves the problem in the prior art where the copper pipe and stainless steel pipe are welded together as a single piece, resulting in inconvenience during the transportation and installation of stainless steel air conditioning pipes.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning pipeline technology, specifically to a stainless steel air conditioning pipeline. Background Technology

[0002] Stainless steel air conditioning pipes refer to pipes made of stainless steel (usually 304 or 316 stainless steel) used to connect indoor and outdoor air conditioning units and transport refrigerant. A search revealed an existing technology (publication number: CN202122754490.2) for a stainless steel air conditioning pipe, which describes "using unique welding technology to ensure good wettability and spreadability of the brazing filler metal, increasing the strength and sealing of the weld, resulting in a beautiful weld formation that does not leak. The product has strong corrosion resistance and high pressure resistance, effectively reducing the amount of copper pipe used in the pipeline, significantly reducing manufacturing costs, and offering high socio-economic benefits and strong practicality." However, in this existing technology, the copper and stainless steel pipes are welded as a single piece, leading to inconvenience during transportation and installation. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a stainless steel air conditioning duct is provided to solve the problem that the copper pipe and stainless steel pipe are welded together as a single piece in existing technologies, which makes the stainless steel air conditioning duct inconvenient to transport and install.

[0004] To achieve the above objectives, a stainless steel air conditioning pipe is provided, comprising: a straight air conditioning refrigerant pipe, wherein an air conditioning refrigerant elbow is connected to one end of the straight air conditioning refrigerant pipe via a pipe fitting. The outer side of the air conditioning refrigerant straight pipe is provided with a stainless steel outer pipe layer, and the inner side of the stainless steel outer pipe layer is composite with a copper inner pipe layer. The surface of the copper inner pipe layer is coated with a nano-modified coating and a PTFE inner lining layer. The pipe fitting is welded to the copper inner pipe layer through the connecting inner pipe, and a pipe clamp is fixed to the outer end of the pipe fitting.

[0005] Furthermore, both the air conditioning refrigerant straight pipe and the air conditioning refrigerant elbow contain a stainless steel outer pipe layer, a copper inner pipe layer, a nano-modified coating, and a PTFE inner lining layer.

[0006] Furthermore, the PTFE inner liner is sprayed onto the surface of the nano-modified coating.

[0007] Furthermore, both ends of the pipe fitting are provided with connecting inner pipes, which are inserted and welded into the inner wall of the air conditioning refrigerant straight pipe and the air conditioning refrigerant elbow.

[0008] Furthermore, a sealing gasket and an elastic pressure pad are provided on the inner side of the pipe fitting.

[0009] Furthermore, the inner side of the pipe fitting is tightly attached to the axial pipe surface of the air conditioning refrigerant straight pipe and the air conditioning refrigerant elbow through a sealing gasket.

[0010] Furthermore, the inner side of the pipe fitting is pressed against the longitudinal pipe end of the air conditioning refrigerant straight pipe and the air conditioning refrigerant elbow by an elastic pressure pad.

[0011] Furthermore, the outer end face of the pipe fitting is provided with an annular groove, and the pipe clamp is fixed at the annular groove of the pipe fitting by fastening bolts.

[0012] The beneficial effects of this utility model are as follows: the stainless steel air conditioning pipe of this utility model utilizes pipe fittings to connect the inner pipe at both ends to the copper inner pipe layer of the air conditioning refrigerant pipe, and then uses pipe clamps to tighten the outer end of the connection, realizing a double connection structure of the stainless steel air conditioning pipe, effectively preventing leakage from single welding methods, ensuring the firmness and sealing of the combined air conditioning pipe, while reducing the welding difficulty of stainless steel material and speeding up the installation efficiency of stainless steel air conditioning pipe; through the composite air conditioning pipe composed of stainless steel outer pipe layer, copper inner pipe layer, nano-modified coating and PTFE inner lining layer, the mechanical strength and corrosion resistance of the air conditioning pipe are further improved, and the service life of the air conditioning pipe is extended. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the stainless steel air conditioning pipe according to an embodiment of the present utility model.

[0014] Figure 2 This is a front view cross-sectional diagram of the connection structure of the stainless steel air conditioning pipe according to an embodiment of the present invention.

[0015] Figure 3 This is a side view of the pipe fitting according to an embodiment of the present utility model.

[0016] Figure 4 This is a partial cross-sectional structural diagram of the stainless steel air conditioning pipe according to an embodiment of the present utility model.

[0017] In the diagram: 1. Air conditioning refrigerant straight pipe; 2. Pipe fitting; 21. Connecting inner pipe; 22. Sealing gasket; 23. Elastic pressure pad; 3. Pipe clamp; 31. Fastening bolt; 4. Air conditioning refrigerant elbow; 5. Stainless steel outer pipe layer; 6. Copper inner pipe layer; 7. Nano-modified coating; 8. PTFE inner lining layer. Detailed Implementation

[0018] Please refer to Figures 1 to 4 As shown, this utility model provides a stainless steel air conditioning pipe, including: an air conditioning refrigerant straight pipe 1, and an air conditioning refrigerant elbow 4 connected to one end of the air conditioning refrigerant straight pipe 1 via a pipe fitting 2. The outer side of the air conditioning refrigerant straight pipe 1 is provided with a stainless steel outer pipe layer 5, and the inner side of the stainless steel outer pipe layer 5 is composite with a copper inner pipe layer 6. The surface of the copper inner pipe layer 6 is coated with a nano-modified coating 7 and a PTFE inner lining layer 8. The pipe fitting 2 is welded to the copper inner pipe layer 6 through the connecting inner pipe 21, and the outer end of the pipe fitting 2 is fixed with a pipe clamp 3.

[0019] When installing the air conditioning piping components on-site, first grind the inner walls of the connecting refrigerant straight pipe 1 and refrigerant elbow 4 to remove the nano-modified coating 7 and PTFE inner lining layer 8. Then, weld the connecting inner pipe 21 of the pipe fitting 2 to the copper inner pipe layer 6 of the refrigerant straight pipe 1 and refrigerant elbow 4. Finally, use pipe clamps 3 to fix the pipe fitting 2 to the connecting end pipe surface of the refrigerant straight pipe 1 and refrigerant elbow 4. This completes the installation of the current refrigerant straight pipe 1 and refrigerant elbow 4. The remaining pipes can be installed in the same way to ensure the sealing of the modularly assembled air conditioning piping.

[0020] In this embodiment, both the air conditioning refrigerant straight pipe 1 and the air conditioning refrigerant elbow 4 contain a stainless steel outer pipe layer 5, a copper inner pipe layer 6, a nano-modified coating 7, and a PTFE inner lining layer 8. The PTFE inner lining layer 8 is sprayed onto the surface of the nano-modified coating 7.

[0021] As a preferred implementation, the air conditioning refrigerant straight pipe 1 and the air conditioning refrigerant elbow 4 are made of a double-walled material composed of stainless steel and copper composite. This gives the air conditioning refrigerant pipeline both strong mechanical strength and corrosion resistance, while utilizing the excellent thermal conductivity of copper to ensure the heat exchange efficiency of the air conditioning refrigerant pipeline and improve the overall performance of air conditioning pipelines made of either stainless steel or copper. The nano-modified coating 7 is made by adding nano-oxide (such as silicon dioxide and aluminum oxide) particles to the coating, which significantly improves the density, wear resistance, and impermeability of the nano-modified coating 7, preventing corrosive media from penetrating. The PTFE inner lining 8 has excellent corrosion resistance and extremely low surface tension, resulting in low resistance to refrigerant flow and ensuring smooth flow of the air conditioning refrigerant.

[0022] In this embodiment, both ends of the pipe connector 2 are provided with connecting inner pipes 21, which are inserted and welded into the inner walls of the air conditioning refrigerant straight pipe 1 and the air conditioning refrigerant elbow 4. A sealing gasket 22 and an elastic pressure pad 23 are provided on the inner side of the pipe connector 2. The inner side of the pipe connector 2 is tightly fitted to the axial pipe surface of the air conditioning refrigerant straight pipe 1 and the air conditioning refrigerant elbow 4 through the sealing gasket 22. The inner side of the pipe connector 2 is pressed against the longitudinal pipe end of the air conditioning refrigerant straight pipe 1 and the air conditioning refrigerant elbow 4 through the elastic pressure pad 23. An annular groove is provided on the outer end face of the pipe connector 2, and the pipe clamp 3 is fixed at the annular groove of the pipe connector 2 by fastening bolts 31.

[0023] As a preferred implementation, the pipe fitting 2 and the connecting inner pipe 21 are made of stainless steel and copper, respectively, for welding with the copper inner pipe layer 6 of the air conditioning pipe, reducing the welding difficulty on the stainless steel material. This accelerates the installation efficiency of the stainless steel air conditioning pipe. The sealing gasket 22 and elastic pressure gasket 23 are used to elastically seal the contact surface between the pipe fitting 2 and the air conditioning pipe, ensuring the tightness of the pipe connection and preventing external liquid infiltration. The pipe clamp 3 further reinforces the connection end between the pipe fitting 2 and the air conditioning refrigerant straight pipe 1 and the air conditioning refrigerant elbow 4, effectively preventing leakage from a single welding method, ensuring the robustness and sealing of the combined air conditioning pipe installation, and ensuring the secure installation of the combined air conditioning pipe.

[0024] This utility model of stainless steel air conditioning ductwork effectively solves the problem of inconvenience in transportation and installation caused by the integral welding of copper and stainless steel pipes in existing technologies. It effectively prevents leakage caused by a single welding method, ensures the firmness and sealing of the combined air conditioning ductwork, reduces the welding difficulty of stainless steel materials, speeds up the installation efficiency of stainless steel air conditioning ductwork, further improves the mechanical strength and corrosion resistance of air conditioning ductwork, and extends the service life of air conditioning ductwork. It is suitable for stainless steel air conditioning ductwork.

Claims

1. A stainless steel air conditioning line, comprising: An air conditioning refrigerant straight pipe (1), wherein an air conditioning refrigerant elbow (4) is connected to the side end of the air conditioning refrigerant straight pipe (1) via a pipe fitting (2), characterized in that: The air conditioning refrigerant straight pipe (1) is provided with a stainless steel outer pipe layer (5) on the outside, and a copper inner pipe layer (6) is composite on the inside of the stainless steel outer pipe layer (5). The surface of the copper inner pipe layer (6) is coated with a nano-modified coating (7) and a PTFE inner lining layer (8). The pipe fitting (2) is welded to the copper inner pipe layer (6) through a connecting inner pipe (21). The outer end of the pipe fitting (2) is fixed with a pipe clamp (3).

2. The stainless steel air conditioning line set of claim 1, wherein The air conditioning refrigerant straight pipe (1) and air conditioning refrigerant elbow (4) both contain a stainless steel outer pipe layer (5), a copper inner pipe layer (6), a nano-modified coating (7) and a PTFE inner lining layer (8).

3. The stainless steel air conditioning line set of claim 2, wherein The PTFE liner (8) is sprayed onto the surface of the nano-modified coating (7).

4. The stainless steel air conditioning line set of claim 1, wherein Both ends of the pipe fitting (2) are provided with connecting inner pipes (21), which are inserted and welded into the inner walls of the air conditioning refrigerant straight pipe (1) and the air conditioning refrigerant elbow (4).

5. The stainless steel air conditioning line set of claim 1, wherein The inner side of the pipe fitting (2) is provided with a sealing gasket (22) and an elastic pressure pad (23).

6. The stainless steel air conditioning line set of claim 5, wherein The inner side of the pipe fitting (2) is in close contact with the axial pipe surface of the air conditioning refrigerant straight pipe (1) and the air conditioning refrigerant elbow (4) through the sealing gasket (22).

7. The stainless steel air conditioning line set of claim 5, wherein The inner side of the pipe fitting (2) is pressed against the longitudinal pipe end of the air conditioning refrigerant straight pipe (1) and the air conditioning refrigerant elbow (4) by an elastic pressure pad (23).

8. The stainless steel air conditioning line set of claim 1, wherein The outer end face of the pipe fitting (2) is provided with an annular groove, and the pipe clamp (3) is fixed at the annular groove of the pipe fitting (2) by fastening bolts (31).

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