Piping assembly and heating and ventilation equipment

Abstract

The invention discloses a piping assembly and heating and ventilation equipment. The piping assembly comprises a first piping and a second piping, the first piping is constructed to be a transmission pipe on a refrigerant circulation loop, and the second piping is constructed to be an inlet connecting pipe or an outlet connecting pipe of a refrigerant container on the refrigerant circulation loop; the first piping comprises a first piping main body and a first connecting part which are connected together, the second piping comprises a second piping main body and a second connecting part which are connected together, and the first connecting part and the second connecting part are connected together; wherein the first piping main body is made of stainless steel, at least part of the first connecting part is made of copper or copper alloy, the second piping main body is made of steel, and the connecting part of the second connecting part and the first connecting part is made of copper or copper alloy. The piping assembly is low in welding difficulty.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a piping assembly and a HVAC device using the piping assembly. Background Art

[0002] In the air-conditioning system, pressure vessels, such as compressors, oil separators, gas-liquid separators, etc., are used to withstand the pressure fluctuations generated during the operation of the air-conditioning system to ensure the safety and efficiency of the air-conditioning system. In order to allow the refrigerant to flow normally, the inlet and outlet of the pressure vessel should be connected to the system piping for the flow of refrigerant.

[0003] At present, in order to reduce the overall cost of the air-conditioning system, the inlet and outlet pipes of the pressure vessel are replaced by stainless steel pipes instead of copper pipes. However, due to the different melting points of stainless steel pipes and copper pipes, a special welding process is required when welding the stainless steel pipes and copper pipes. This will increase the manufacturing difficulty of the entire air-conditioning system. Summary of the invention

[0004] The main purpose of this application is to provide a piping assembly and HVAC equipment that can reduce the manufacturing difficulty of the air-conditioning system.

[0005] On the one hand, the present application provides a piping assembly, including a first piping and a second piping, the first piping being configured as a transmission pipe on a refrigerant circulation loop, and the second piping being configured as an inlet pipe or an outlet pipe of a refrigerant container on the refrigerant circulation loop; the first piping comprising a first piping body and a first connecting portion connected together, the second piping comprising a second piping body and a second connecting portion connected together, the first connecting portion and the second connecting portion being connected together; wherein the first piping body is made of stainless steel, at least a portion of the first connecting portion is made of copper or a copper alloy, the second piping body is made of steel, and the connecting portion of the second connecting portion and the first connecting portion is made of copper or a copper alloy.

[0006] In this way, on the one hand, the piping assembly provided in the present application uses less copper material, which can reduce the manufacturing cost of the piping assembly; on the other hand, when welding technology is used to weld the first piping and the second piping, the material selection of the first connection part and the second connection part makes the welding between the first connection part and the second connection part easier to achieve in terms of welding technology. Compared with the solutions in the related technology, the connection difficulty of the piping assembly is reduced, and then the manufacturing difficulty of the entire HVAC equipment is reduced.

[0007] As an optional implementation, the first connection part is a first copper sleeve or a first copper layer plated on the first pipe body, and the second connection part is a second copper sleeve or a second copper layer plated on the second pipe body.

[0008] As an optional implementation, the first connecting part is a first copper sleeve, and the second connecting part is a second copper sleeve.

[0009] As an optional implementation, one end of the second copper sleeve is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the other end of the second copper sleeve is sleeved on the outside of the second piping body and connected to the second piping body.

[0010] As an optional embodiment, the second copper sleeve includes a first straight pipe section and a first flared section and a second flared section connected at both ends of the first straight pipe section; the first flared section includes a first transition pipe section and a second straight pipe section connected together, the first transition pipe section is connected between one end of the first straight pipe section and the end of the second straight pipe section, and the second straight pipe section is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve; the second flared section includes a second transition pipe section and a third straight pipe section connected together, the second transition pipe section is connected between the other end of the first straight pipe section and the end of the third straight pipe section, and the third straight pipe section is sleeved on the outside of the second piping body and connected to the second piping body; wherein, the diameter of the second straight pipe section and the diameter of the third straight pipe section are both larger than the diameter of the first straight pipe section.

[0011] As an optional implementation, the first copper sleeve is arranged on the outside of the first piping body; the first copper sleeve is a straight pipe, and part of the structure of the first piping body overlaps part of the structure of the second straight pipe section in the radial direction of the piping assembly.

[0012] In this way, the structure at the connection between the first pipe and the second pipe has a larger dimension in the radial direction of the pipe assembly, thereby improving the connection reliability between the first pipe and the second pipe, and further improving the structural strength and stability of the pipe assembly provided in this embodiment.

[0013] As an optional embodiment, the first piping body is a straight pipe; or, the first piping body includes a first pipe segment, a first connecting pipe segment and a second pipe segment connected in sequence, the first pipe segment and the second pipe segment are both straight pipes, and the diameter of the second pipe segment is smaller than the diameter of the first pipe segment; the first copper sleeve is arranged outside the first pipe segment, and the first pipe segment and the second straight pipe segment overlap in the radial direction of the piping assembly.

[0014] In this way, the structure at the connection between the first pipe and the second pipe has a larger dimension in the radial direction of the pipe assembly, thereby improving the connection reliability between the first pipe and the second pipe, and further improving the structural strength and stability of the pipe assembly provided in this embodiment.

[0015] As an optional embodiment, the first copper sleeve is arranged outside the first piping body, the first piping body has a first end portion facing the second piping body, and the second straight pipe section has a second end portion arranged away from the second piping body; in the axial direction of the piping assembly, there is a spacing between the first end portion and the second end portion, and within the range of the axial spacing, the first piping body and the second straight pipe section do not overlap in the radial direction of the piping assembly.

[0016] As an optional embodiment, the first copper sleeve includes a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section connected in sequence, and the diameter of the fifth straight pipe section is smaller than the diameter of the fourth straight pipe section; the second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section is sleeved on the outside of the first piping body and connected to the first piping body.

[0017] As an optional embodiment, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is smaller than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment is sleeved on the outside of the sixth straight pipe segment and connected to the sixth straight pipe segment; or, the first piping body is a straight pipe; or, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is larger than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment is sleeved on the outside of the sixth straight pipe segment and connected to the sixth straight pipe segment.

[0018] As an optional embodiment, the first copper sleeve is a straight pipe: the first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the first copper sleeve is arranged on the outside of the sixth straight pipe section and connected to the sixth straight pipe section; or, the first piping body is a straight pipe; or, the first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the first copper sleeve is arranged on the outside of the sixth straight pipe section and connected to the sixth straight pipe section.

[0019] As an optional embodiment, the first copper sleeve includes a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section connected in sequence, and the diameter of the fifth straight pipe section is larger than the diameter of the fourth straight pipe section; the second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section is sleeved on the outside of the first piping body and connected to the first piping body.

[0020] As an optional embodiment, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is smaller than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment is sleeved on the outside of the sixth straight pipe segment and connected to the sixth straight pipe segment; or, the first piping body is a straight pipe; or, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is larger than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment is sleeved on the outside of the sixth straight pipe segment and connected to the sixth straight pipe segment.

[0021] As an optional embodiment, the end of the first copper sleeve extends into the first piping body, the first piping body has a first end facing the second piping body, and the second straight pipe section has a second end away from the second piping body; in the axial direction of the piping assembly, there is a spacing between the first end and the second end, and within the range of the axial spacing, the first piping body and the second straight pipe section do not overlap in the radial direction of the piping assembly.

[0022] As an optional embodiment, the first copper sleeve includes a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section connected in sequence, and the diameter of the fifth straight pipe section is smaller than the diameter of the fourth straight pipe section; the second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section extends into the first piping body and is connected to the first piping body.

[0023] As an optional embodiment, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is smaller than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment extends into the sixth straight pipe segment and is connected to the sixth straight pipe segment; or, the first piping body is a straight pipe; or, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is larger than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment extends into the sixth straight pipe segment and is connected to the sixth straight pipe segment.

[0024] As an optional embodiment, the first copper sleeve is a straight pipe: the first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the first copper sleeve extends into the sixth straight pipe section and is connected to the sixth straight pipe section; or, the first piping body is a straight pipe; or, the first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the first copper sleeve extends into the sixth straight pipe section and is connected to the sixth straight pipe section.

[0025] As an optional embodiment, the first copper sleeve includes a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section connected in sequence, and the diameter of the fifth straight pipe section is larger than the diameter of the fourth straight pipe section; the second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section extends into the first piping body and is connected to the first piping body.

[0026] As an optional embodiment, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is smaller than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment extends into the sixth straight pipe segment and is connected to the sixth straight pipe segment; or, the first piping body is a straight pipe; or, the first piping body includes a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, the diameter of the seventh straight pipe segment is larger than the diameter of the sixth straight pipe segment, and the fifth straight pipe segment extends into the sixth straight pipe segment and is connected to the sixth straight pipe segment.

[0027] As an optional implementation, the second piping body includes a main body section and an interface pipe section connected together; the other end of the second copper sleeve is sleeved on the outside of the interface pipe section and connected to the interface pipe section.

[0028] As an optional embodiment, the second copper sleeve includes an eighth straight pipe segment, a fifth transition pipe segment and a ninth straight pipe segment connected in sequence, and the diameter of the eighth straight pipe segment is larger than the diameter of the ninth straight pipe segment; the eighth straight pipe segment is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment is sleeved on the outside of the interface pipe segment and connected to the interface pipe segment.

[0029] As an optional embodiment, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, the interface pipe section is a straight pipe; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is smaller than the diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

[0030] As an optional embodiment, the second copper sleeve is a straight pipe; the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is larger than the pipe diameter of the second interface straight pipe section, the second copper sleeve is arranged on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, the interface pipe section is a straight pipe; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the second copper sleeve is arranged on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

[0031] As an optional embodiment, the second copper sleeve includes an eighth straight pipe segment, a fifth transition pipe segment and a ninth straight pipe segment connected in sequence, and the diameter of the eighth straight pipe segment is smaller than the diameter of the ninth straight pipe segment; the eighth straight pipe segment is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment is sleeved on the outside of the interface pipe segment and connected to the interface pipe segment.

[0032] As an optional embodiment, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, the interface pipe section is a straight pipe; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is smaller than the diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

[0033] As an optional implementation, a first limiting ring protruding toward the middle of the second copper sleeve is provided on the inner wall of the second copper sleeve; the first limiting ring is used to limit the relative position between the first copper sleeve and the second copper sleeve.

[0034] In this way, before welding the first copper sleeve and the second copper sleeve, the first copper sleeve and the second copper sleeve can be limited by the first limiting ring, that is, the end of the first copper sleeve is abutted against the first limiting ring, so that in the subsequent welding process, the first copper sleeve and the second copper sleeve can be quickly welded together, thereby improving the connection efficiency of the piping assembly provided in the present application.

[0035] As an optional embodiment, the second piping body includes a main body section and an interface pipe section connected together; one end of the second copper sleeve is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the other end of the second copper sleeve extends into the interface pipe section and connected to the interface pipe section.

[0036] As an optional embodiment, the second copper sleeve includes an eighth straight pipe segment, a fifth transition pipe segment and a ninth straight pipe segment connected in sequence, and the diameter of the eighth straight pipe segment is larger than the diameter of the ninth straight pipe segment; the eighth straight pipe segment is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment extends into the interface pipe segment and is connected to the interface pipe segment.

[0037] As an optional embodiment, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, the interface pipe section is a straight pipe; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is smaller than the diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

[0038] As an optional implementation, the second copper sleeve is a straight pipe; the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, the interface pipe section is a straight pipe; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is smaller than the diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

[0039] As an optional embodiment, the second copper sleeve includes an eighth straight pipe segment, a fifth transition pipe segment and a ninth straight pipe segment connected in sequence, and the diameter of the eighth straight pipe segment is smaller than the diameter of the ninth straight pipe segment; the eighth straight pipe segment is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment extends into the interface pipe segment and is connected to the interface pipe segment.

[0040] As an optional embodiment, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, the interface pipe section is a straight pipe; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the diameter of the first interface straight pipe section is smaller than the diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

[0041] As an optional implementation, a first limiting ring protruding toward the middle of the second copper sleeve is provided on the inner wall of the second copper sleeve; the first limiting ring is used to limit the relative position between the first copper sleeve and the second copper sleeve.

[0042] In this way, the connection efficiency between the first pipe and the second pipe can be improved, that is, the connection efficiency of the pipe assembly provided in the present application can be improved.

[0043] As an optional embodiment, the second piping body includes a main body section and an interface pipe section connected together, the interface pipe section is arranged closer to the first piping than the main body section, and the interface pipe section is connected to the first piping; the inner surface of the second piping body is plated with a second copper layer, or the inner surface and outer surface of the second piping body are both plated with a second copper layer.

[0044] As an optional embodiment, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the pipe diameter of the first interface straight pipe section is larger than the pipe diameter of the second interface straight pipe section, the first interface straight pipe section is connected to the first connecting part, and the second interface straight pipe section is connected to the main section.

[0045] As an optional embodiment, the interface pipe section is a straight pipe, and one end of the interface pipe section is connected to the first connecting part, and the other end of the interface pipe section is connected to the main section; or, the interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the first interface straight pipe section is connected to the first piping, and the second interface straight pipe section is connected to the main section.

[0046] As an optional implementation, a second limiting ring protruding toward the middle of the interface pipe section is provided on the inner wall of the interface pipe section; the second limiting ring is used to limit the relative position between the first pipe and the second pipe.

[0047] Thus, by providing a second limiting ring on the inner wall of the interface pipe section, when connecting the first pipe and the second pipe, the first pipe and the second pipe can be positioned first and then welded, thereby improving the connection efficiency between the first pipe and the second pipe.

[0048] As an optional implementation, the piping assembly provided in the present application further includes a third piping; the third piping is connected to an end of the first piping away from the second piping.

[0049] In this way, by setting the third piping, the length of the piping assembly provided by the present application can be adjusted to meet the requirements of different piping lengths in HVAC equipment.

[0050] As an optional implementation, the pipe opening of the third pipe is arranged opposite to the pipe opening of the first pipe.

[0051] As an optional implementation, the third pipe extends into the first pipe and is connected to the first pipe; a plurality of positioning ribs are arranged on the outer wall of the third pipe and are spaced apart along the circumference of the third pipe, and the positioning ribs stop at the inner wall surface of the first pipe.

[0052] By setting the above-mentioned positioning ribs, the gap formed between the third piping and the first piping can be filled to ensure the coaxial setting of the third piping and the first piping, thereby improving the uniformity of the solder filled between the third piping and the first piping, and further improving the connection reliability between the third piping and the first piping.

[0053] As an optional implementation, a filter assembly is provided in the second pipe.

[0054] In this way, by providing the filter assembly, the solder can be prevented from falling into the refrigerant container to a certain extent during the welding process of the first pipe and the second pipe, thereby enabling the refrigerant container to maintain good performance.

[0055] As an optional implementation, an annular material storage groove with a notch facing the first pipe is formed between the second copper sleeve and the second pipe body; the end of the first copper sleeve is confined in the annular material storage groove.

[0056] In this way, the first copper sleeve and the second copper sleeve can be connected by more solder, and this part of the solder is contained in the annular storage tank. In this way, the connection reliability between the first copper sleeve and the second copper sleeve can be improved, and then the connection reliability between the first piping and the second piping can be improved, thereby improving the structural stability of the piping assembly provided in the present application.

[0057] As an optional embodiment, the first piping body has a first end portion facing the second piping body, and the first copper sleeve has a third end portion facing the second piping body; the third end portion is disposed closer to the second piping body than the first end portion.

[0058] As an optional embodiment, the first copper sleeve has a fourth end portion arranged opposite to the third end portion; the second copper sleeve has a fifth end portion arranged away from the second piping body, the fifth end portion is arranged closer to the second piping body than the fourth end portion, and the spacing between the fourth end portion and the fifth end portion in the axial direction of the piping assembly is greater than or equal to 20 mm; and / or the spacing between the fourth end portion and the first end portion is greater than or equal to 30 mm.

[0059] Thus, by limiting the size, the uniformity of solder distribution can be improved, thereby improving the reliability of the connection of the internal structure of the piping assembly.

[0060] As an optional implementation, the first pipe body and the second pipe body are both seamed steel pipes.

[0061] By using the seamed steel pipe, the first pipe body and the second pipe body can be applied to more sizes, and the first pipe body and the second pipe body have higher corrosion resistance.

[0062] As an optional implementation, the first pipe and the second pipe are coaxially arranged.

[0063] In this way, the uniformity of the solder used when welding the first pipe and the second pipe can be improved, so as to further improve the reliability after the first pipe and the second pipe are connected.

[0064] As an optional embodiment, the first piping body and the first connection part are welded together by a first solder, the first connection part and the second connection part are welded together by a second solder, and the second piping body and the second connection part are welded together by a third solder; the melting points of the first solder and the third solder are both greater than the melting point of the second solder.

[0065] With such an arrangement, when the piping assembly is inspected and repaired at a later stage, when the second solder is melted, since the melting points of the first solder and the third solder are both greater than the melting point of the second solder, the first solder and the third solder will not be affected. In other words, after the connection between the first connection part and the second connection part is disconnected, the connection between the first piping body and the first connection part and the connection between the second piping body and the second connection part will not be affected, thereby improving the convenience of inspecting the piping assembly.

[0066] On the other hand, the present application also provides a HVAC equipment having a refrigerant circulation loop, characterized in that the refrigerant circulation loop includes a refrigerant container and the above-mentioned piping assembly; wherein the refrigerant container is any one of a compressor, an oil separator and a gas-liquid separator, and the refrigerant container is made of steel.

[0067] As an optional embodiment, the refrigerant container is a compressor; the first pipe is configured as an exhaust transmission pipe, and the first pipe body has at least one first bending portion; and the second pipe is configured as an outlet pipe for exhaust of the compressor.

[0068] As an optional embodiment, the other axial end of the first piping body includes another first connection portion, which is connected to another refrigerant container, and the other refrigerant container is an oil separator; the oil separator inlet pipe is constructed as a second piping, and the other first connection portion is connected to the second connection portion of the inlet pipe of the oil separator.

[0069] As an optional embodiment, the oil separator further includes a first separation chamber, the main component of which is made of steel; the second piping body of the inlet pipe of the oil separator is vertically inserted into the first separation chamber, and the second piping body has at least one second bending portion.

[0070] As an optional implementation, the outlet pipe of the oil separator is configured as a second pipe; the second pipe body of the outlet pipe is inserted into the first separation chamber along the axial direction.

[0071] As an optional embodiment, the other axial end of the first piping body includes another first connection portion, which is connected to another refrigerant container, and the other refrigerant container is a gas-liquid separator; the gas-liquid separator inlet connecting pipe is constructed as a second piping, and the other first connection portion is connected to the second connection portion of the inlet connecting pipe of the gas-liquid separator.

[0072] As an optional embodiment, the gas-liquid separator further includes a second separation chamber, the main component of which is made of steel; the second piping body of the inlet pipe of the gas-liquid separator is inserted into the second separation chamber along the axial direction and is eccentrically arranged relative to the axial center line of the second separation chamber.

[0073] As an optional embodiment, the outlet pipe of the gas-liquid separator is configured as a second piping; the second piping body of the outlet pipe is inserted into the second separation chamber along the axial direction and is eccentrically arranged relative to the axial center line of the second separation chamber; the part of the outlet pipe inserted into the second separation chamber is connected together with the part of the inlet pipe inserted into the second separation chamber.

[0074] In the piping assembly and HVAC equipment in the embodiments of the present application, the first piping body of the piping assembly is made of stainless steel, the second piping body is made of steel, and the connection between the first piping and the second piping is realized by the connection between the first connecting part and the second connecting part, at least part of the first connecting part is made of copper or copper alloy, and the connecting part between the second connecting part and the first connecting part is made of copper or copper alloy.

[0075] In this way, on the one hand, the piping assembly provided in the embodiment of the present application uses less copper material, which can reduce the manufacturing cost of the piping assembly; on the other hand, when welding technology is used to weld the first piping and the second piping, the material selection of the first connecting part and the second connecting part makes the welding between the first connecting part and the second connecting part easier to achieve in terms of welding technology. Compared with the solutions in the related technology, the connection difficulty of the piping assembly is reduced, and then the manufacturing difficulty of the entire HVAC equipment is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 A schematic diagram of the first structure of the pipe assembly provided in an embodiment of the present application;

[0077] Figure 2 A schematic diagram of a first structure of a second pipe in a pipe assembly provided in an embodiment of the present application;

[0078] Figure 3 A second structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0079] Figure 4 A second structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0080] Figure 5 A third structural schematic diagram of the pipe assembly provided in an embodiment of the present application;

[0081] Figure 6 A fourth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0082] Figure 7 A fifth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0083] Figure 8 A sixth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0084] Fig. 9 A seventh structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0085] Fig.10 An eighth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0086] Fig.11 A ninth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0087] Fig.12 A tenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0088] Fig.13 This is an eleventh structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0089] Fig.14 A twelfth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0090] Fig.15 This is a thirteenth structural schematic diagram of the piping assembly provided in an embodiment of the present application;

[0091] Fig.16 This is a fourteenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0092] Fig.17A fifteenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0093] Fig.18 A sixteenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0094] Fig.19 A seventeenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0095] Fig. 20 This is a schematic diagram of the eighteenth structure of the piping assembly provided in the embodiment of the present application;

[0096] Fig.21 A nineteenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0097] Fig. 22 A twentieth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0098] Fig.23 A twenty-first structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0099] Fig.24 A third structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0100] Fig.25 A fourth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0101] Fig.26 A fifth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0102] Fig. 27 A sixth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0103] Fig.28 A seventh structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0104] Fig.29 This is an eighth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0105] Fig.30 A ninth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0106] Fig.31 A tenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0107] Fig.32This is an eleventh structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0108] Fig.33 A twelfth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0109] Fig.34 This is a thirteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0110] Fig.35 This is a fourteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0111] Fig.36 A fifteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0112] Fig.37 A sixteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0113] Fig.38 A seventeenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0114] Fig.39 This is an eighteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0115] Fig.40 A nineteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0116] Fig.41 A twentieth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0117] Fig.42 A twenty-first structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0118] Fig.43 A twenty-second structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0119] Fig.44 A twenty-third structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0120] Fig.45 A twenty-fourth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application;

[0121] Fig.46A twenty-second structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0122] Fig.47 A twenty-third structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0123] Fig.48 A schematic diagram of the planar structure of a third pipe in the pipe assembly provided in an embodiment of the present application;

[0124] Fig.49 A twenty-fourth structural schematic diagram of a pipe assembly provided in an embodiment of the present application;

[0125] Fig.50 A three-dimensional structural schematic diagram of a partial structure of a warm-pass device provided in an embodiment of the present application;

[0126] Fig.51 A schematic diagram of the three-dimensional structure of a compressor in a HVAC device provided in an embodiment of the present application;

[0127] Fig.52 A schematic diagram of the three-dimensional structure of a compressor in a HVAC device provided in an embodiment of the present application from another perspective;

[0128] Fig.53 A schematic diagram of the three-dimensional structure of the oil separator provided in an embodiment of the present application;

[0129] Fig.54 A schematic diagram of the three-dimensional structure of a gas-liquid separator provided in an embodiment of the present application;

[0130] Fig.55 A schematic diagram of a first structure of connecting the exhaust pipe of a compressor and a transmission pipe in a HVAC device provided in an embodiment of the present application;

[0131] Fig.56 A second structural schematic diagram of the connection between the exhaust pipe of the compressor and the transmission pipe in the HVAC equipment provided in the embodiment of the present application;

[0132] Fig.57 A third structural schematic diagram of the connection between the exhaust pipe and the transmission pipe of the compressor in the HVAC equipment provided in the embodiment of the present application;

[0133] Fig.58 A schematic diagram of the structure of the connection between the first air inlet pipe or the second air outlet pipe of the oil separator in the HVAC equipment provided in an embodiment of the present application and the transmission pipe;

[0134] Fig.59 A schematic diagram of the structure of the connection between the second air inlet pipe or the third air outlet pipe of the gas-liquid separator in the HVAC equipment provided in an embodiment of the present application and the transmission pipe;

[0135] Fig.60A refrigerant flow diagram of the HVAC equipment during cooling provided in an embodiment of the present application;

[0136] Fig.61 A refrigerant flow diagram of the HVAC equipment during heating provided in an embodiment of the present application.

[0137] Description of Figure Numbers:

[0138] 1. First piping; 2. Second piping; 3. Third piping; 4. Filter assembly; 5. Annular material storage tank;

[0139] 10. Piping assembly; 11. First piping body; 12. First connection part; 21. Second piping body; 22. Second connection part; 23. First stop ring; 24. Third stop ring; 25. Fourth stop ring; 31. Positioning rib; 32. Third piping body; 20. Compressor; 30. Oil separator; 40. Gas-liquid separator; 50. Four-way valve; 60. Outdoor unit heat exchanger; 70. Filter; 80. Electronic expansion valve; 90. Refrigerant heat dissipation device;

[0140] 111, first pipe section; 112, first connecting pipe section; 113, second pipe section; 114, first end; 115, sixth straight pipe section; 116, fourth transition pipe section; 117, seventh straight pipe section; 118, eighth straight pipe; 119, fifth transition pipe; 121, fourth straight pipe section; 122, third transition pipe section; 123, fifth straight pipe section; 124, third end; 125, fourth end; 211, main section; 212, interface pipe section; 213, second limiting ring; 221, first straight pipe section; 222, first flared section; 223, second flared section; 224, eighth straight section; 225, fifth transition section; 226, ninth straight section; 227, fifth end; 201, first exhaust pipe; 202, air intake pipe; 203, injection pipe; 301, first air intake pipe; 302, first separation body; 303, second exhaust pipe; 304, oil drain pipe; 401, second air intake pipe; 402, second separation body; 403, third exhaust pipe; 404, gas balance pipe; 405, liquid balance pipe; 100, indoor unit;

[0141] 1110, the ninth straight pipe; 1120, the sixth transition pipe; 1130, the tenth straight pipe; 2121, the first interface straight pipe section; 2122, the first interface transition pipe section; 2123, the second interface straight pipe section; 2221, the first transition pipe section; 2222, the second straight pipe section; 2223, the second end; 2231, the second transition pipe section; 2232, the third straight pipe section; 2011, the third bending portion; 3011, the second bending portion. DETAILED DESCRIPTION

[0142] At present, in order to reduce the overall cost of the air-conditioning system, the inlet and outlet pipes of the pressure vessel are replaced by stainless steel pipes instead of copper pipes. However, due to the different melting points of stainless steel pipes and copper pipes, a special welding process is required when welding the stainless steel pipes and copper pipes. This will increase the manufacturing difficulty of the entire air-conditioning system.

[0143] Based on this, the embodiments of the present application provide a piping assembly and HVAC equipment. By limiting the material of the piping assembly, the difficulty of welding the piping assembly can be reduced, thereby reducing the manufacturing difficulty of the entire air-conditioning system.

[0144] The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0145] See also Figure 1 , Figure 1 A schematic diagram of the first structure of a piping assembly provided in an embodiment of the present application. As shown in the figure, the present embodiment provides a piping assembly 10, including a first piping 1 and a second piping 2, wherein the first piping 1 is configured as a transmission pipe on a refrigerant circulation loop, and the second piping 2 is configured as an inlet pipe or an outlet pipe of a refrigerant container on a refrigerant circulation loop; the first piping 1 includes a first piping body 11 and a first connecting portion 12 connected together, and the second piping 2 includes a second piping body 21 and a second connecting portion 22 connected together, and the first connecting portion 12 is connected to the second connecting portion 22; wherein the first piping body 11 is made of stainless steel, and at least a portion of the first connecting portion 12 is made of copper or a copper alloy, the second piping body 21 is made of steel, and the connecting portion of the second connecting portion 22 and the first connecting portion 12 is made of copper or a copper alloy.

[0146] It should be noted that the above-mentioned refrigerant container can be a compressor, a gas-liquid separator or an oil separator. The connection methods of the inlet pipe and the transmission pipe and the outlet pipe and the transmission pipe of these three refrigerant containers will be described in detail in the following implementation methods. In this embodiment, only some common features are described in detail.

[0147] In this way, by limiting the materials of the first piping body 11, the second piping body 21, the first connection part 12 and the second connection part 22, compared with the related art, on the one hand, the piping assembly 10 provided in this embodiment uses less copper material, which can reduce the manufacturing cost of the piping assembly 10; on the other hand, when welding technology is used to weld the first piping 1 and the second piping 2, the material selection of the first connection part 12 and the second connection part 22 makes the welding between the first connection part 12 and the second connection part 22 easier to achieve in terms of welding technology, thereby reducing the connection difficulty of the piping assembly 10.

[0148] It can be seen from the above that at least part of the first connection part 12 is made of copper or copper alloy, and the connection part of the second connection part 22 and the first connection part 12 is made of copper or copper alloy, that is, the welding between the first connection part 12 and the second connection part 22 is the welding between copper materials, or the welding between copper alloys and copper materials, or the welding between copper alloys and copper alloys. In this way, when welding structures both of which contain copper materials, since they are similar in thermal expansion coefficient, melting point, chemical composition, thermal conductivity, etc., the welding difficulty is relatively small, which not only improves the quality and stability of welding, but also simplifies the control of welding process parameters and the selection of filling materials.

[0149] The specific selection of the first connection part 12 and the second connection part 22 can be that the first connection part 12 is a first copper sleeve or a first copper layer plated on the first pipe body 11, and the second connection part 22 is a second copper sleeve or a second copper layer plated on the second pipe body 21. The method of the first connection part 12 being the first copper sleeve and the second connection part 22 being the second copper sleeve can be referred to Figure 1 .

[0150] Further, the second connection portion 22 can be referred to as the second copper layer. Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of a first structure of the second pipe in the pipe assembly provided in an embodiment of the present application, Figure 3 This is a schematic diagram of the second structure of the second pipe in the pipe assembly provided in the embodiment of the present application. Figure 2 As shown, the second copper layer can be plated only on the inner wall surface of the second pipe body 21. In this case, the inner wall surface of the second pipe body 21 is welded to the first connection portion 12. In other words, the second pipe body 21 is sleeved on the outside of the first connection portion 12. Figure 3 As shown, the second copper layer can be plated on the inner wall surface and the outer wall surface of the second piping body 21. At this time, the inner wall surface of the second piping body 21 or the outer wall surface of the second piping body 21 can be welded with the first connecting portion 12. In other words, the second piping body 21 can be sleeved on the outside of the first connecting portion 12, and the first connecting portion 12 can also be sleeved on the outside of the second piping body 21. Here, there is no specific restriction on the type selection of the first connecting portion 12 and the second connecting portion 22.

[0151] In order to provide a detailed introduction to the pipe assembly 10 provided in this embodiment, the following will be specifically introduced by taking the first connecting portion 12 as the first copper sleeve and the second connecting portion 22 as the second copper sleeve as an example.

[0152] like Figure 1As shown, when the first connecting part 12 is a first copper sleeve and the second connecting part 22 is a second copper sleeve, the positional relationship between the first copper sleeve and the second copper sleeve and the positional relationship between the second copper sleeve and the second piping body 21 can be that one end of the second copper sleeve is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the other end of the second copper sleeve is sleeved on the outside of the second piping body 21 and connected to the second piping body 21.

[0153] The shape of the second copper sleeve may also be different shapes, which will be specifically introduced below in combination with the shape of the second copper sleeve.

[0154] like Figure 1 As shown, the second copper sleeve includes a first straight pipe section 221 and a first flared section 222 and a second flared section 223 connected at both ends of the first straight pipe section 221; the first flared section 222 includes a first transition pipe section 2221 and a second straight pipe section 2222 connected together, the first transition pipe section 2221 is connected between one end of the first straight pipe section 221 and the end of the second straight pipe section 2222, and the second straight pipe section 2222 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve; the second flared section 223 includes a second transition pipe section 2231 and a third straight pipe section 2232 connected together, the second transition pipe section 2231 is connected between the other end of the first straight pipe section 221 and the end of the third straight pipe section 2232, and the third straight pipe section 2232 is sleeved on the outside of the second piping body 21 and connected to the second piping body 21; wherein the pipe diameter of the second straight pipe section 2222 and the pipe diameter of the third straight pipe section 2232 are both larger than the pipe diameter of the first straight pipe section 221.

[0155] Please combine Figure 4 and Figure 5 , Figure 4 A second structural schematic diagram of the piping assembly provided in an embodiment of the present application, Figure 5 This is a third structural schematic diagram of the piping assembly provided in the embodiment of the present application. Figure 4 and Figure 5 As shown, with respect to the positional relationship between the first copper sleeve and the first pipe body 11, the first copper sleeve may be arranged outside the first pipe body 11; the first copper sleeve is a straight pipe, and a part of the structure of the first pipe body 11 overlaps with a part of the structure of the second straight pipe section 2222 in the radial direction of the pipe assembly 10. In this way, the structure at the connection between the first pipe 1 and the second pipe 2 is larger in the radial direction of the pipe assembly 10, thereby improving the connection reliability between the first pipe 1 and the second pipe 2, and further improving the structural strength and structural stability of the pipe assembly 10 provided in this embodiment.

[0156] like Figure 4 As shown, in some embodiments, the first pipe body 11 may be a straight pipe.

[0157] like Figure 5 As shown, in other embodiments, the first pipe body 11 may include a first pipe section 111, a first connecting pipe section 112, and a second pipe section 113 which are connected in sequence, the first pipe section 111 and the second pipe section 113 are both straight pipes, and the pipe diameter of the second pipe section 113 is smaller than the pipe diameter of the first pipe section 111; the first copper sleeve is arranged outside the first pipe section 111, and the first pipe section 111 and the second straight pipe section 2222 overlap in the radial direction of the pipe assembly 10. In this way, the structure at the connection between the first pipe 1 and the second pipe 2 has a larger size in the radial direction of the pipe assembly 10, thereby improving the connection reliability between the first pipe 1 and the second pipe 2, and further improving the structural strength and structural stability of the pipe assembly 10 provided in this embodiment.

[0158] Please combine Figures 6 to 14 , Figure 6 This is a fourth structural schematic diagram of the piping assembly provided in the embodiment of the present application. Figure 7 A fifth structural schematic diagram of a pipe assembly provided in an embodiment of the present application is shown. Figure 8 This is a sixth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig. 9 This is a seventh structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig.10 This is an eighth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig.11 This is a ninth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig.12 This is a tenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig.13 This is an eleventh structural schematic diagram of the piping assembly provided in an embodiment of the present application. Fig.14 The twelfth structural schematic diagram of the piping assembly provided in the embodiment of the present application. As shown in the figure, in other embodiments, the first piping body 11 and the second straight pipe section 2222 may not overlap in the radial direction of the piping assembly 10. Specifically, the first copper sleeve is arranged outside the first piping body 11, the first piping body 11 has a first end 114 arranged facing the second piping body 21, and the second straight pipe section 2222 has a second end 2223 arranged away from the second piping body 21; in the axial direction of the piping assembly 10, there is a spacing between the first end 114 and the second end 2223, and within the range of the axial spacing, the first piping body 11 and the second straight pipe section 2222 do not overlap in the radial direction of the piping assembly 10.

[0159] The shapes of the first copper sleeve and the first pipe body 11 may be the following.

[0160] Specifically, Figures 6 to 8As shown, in some embodiments, the first copper sleeve includes a fourth straight pipe segment 121, a third transition pipe segment 122 and a fifth straight pipe segment 123 connected in sequence, and the diameter of the fifth straight pipe segment 123 is smaller than the diameter of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved on the outside of the fourth straight pipe segment 121 and connected to the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved on the outside of the first piping body 11 and connected to the first piping body 11.

[0161] Furthermore, if Figure 6 As shown, in some embodiments, the first piping body 11 includes a sixth straight pipe segment 115, a fourth transition pipe segment 116 and a seventh straight pipe segment 117 connected in sequence, the diameter of the seventh straight pipe segment 117 is smaller than the diameter of the sixth straight pipe segment 115, and the fifth straight pipe segment 123 is sleeved on the outside of the sixth straight pipe segment 115 and connected to the sixth straight pipe segment 115.

[0162] like Figure 7 As shown, in some other embodiments, the first pipe body 11 is a straight pipe.

[0163] like Figure 8 As shown, in some other embodiments, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the pipe diameter of the seventh straight pipe section 117 is larger than the pipe diameter of the sixth straight pipe section 115, and the fifth straight pipe section 123 is sleeved on the outside of the sixth straight pipe section 115 and connected to the sixth straight pipe section 115.

[0164] like Figures 9 to 11 As shown, in other embodiments, the first copper sleeve is a straight tube.

[0165] like Fig. 9 As shown, in some embodiments, the first piping body 11 includes a sixth straight pipe segment 115, a fourth transition pipe segment 116 and a seventh straight pipe segment 117 connected in sequence, the diameter of the seventh straight pipe segment 117 is smaller than the diameter of the sixth straight pipe segment 115, and the first copper sleeve is arranged on the outside of the sixth straight pipe segment 115 and connected to the sixth straight pipe segment 115.

[0166] like Fig.10 As shown, in some other embodiments, the first pipe body 11 is a straight pipe.

[0167] like Fig.11 As shown, in some other embodiments, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the diameter of the seventh straight pipe section 117 is larger than the diameter of the sixth straight pipe section 115, and the first copper sleeve is arranged on the outside of the sixth straight pipe section 115 and connected to the sixth straight pipe section 115.

[0168] like Figure 12 to Figure 14As shown, in some other embodiments, the first copper sleeve includes a fourth straight pipe segment 121, a third transition pipe segment 122 and a fifth straight pipe segment 123 which are connected in sequence, and the pipe diameter of the fifth straight pipe segment 123 is larger than the pipe diameter of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved on the outside of the fourth straight pipe segment 121 and connected to the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved on the outside of the first piping body 11 and connected to the first piping body 11.

[0169] like Fig.12 As shown, in some embodiments, the first piping body 11 includes a sixth straight pipe segment 115, a fourth transition pipe segment 116 and a seventh straight pipe segment 117 connected in sequence, the diameter of the seventh straight pipe segment 117 is smaller than the diameter of the sixth straight pipe segment 115, and the fifth straight pipe segment 123 is sleeved on the outside of the sixth straight pipe segment 115 and connected to the sixth straight pipe segment 115.

[0170] like Fig.13 As shown, in some other embodiments, the first pipe body 11 is a straight pipe.

[0171] like Fig.14 As shown, in some other embodiments, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the pipe diameter of the seventh straight pipe section 117 is larger than the pipe diameter of the sixth straight pipe section 115, and the fifth straight pipe section 123 is sleeved on the outside of the sixth straight pipe section 115 and connected to the sixth straight pipe section 115.

[0172] Please continue to combine Figures 15 to 23 , Fig.15 This is a thirteenth structural schematic diagram of the piping assembly provided in an embodiment of the present application. Fig.16 This is a fourteenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig.17 This is a fifteenth structural schematic diagram of the piping assembly provided in the embodiment of the present application. Fig.18 This is a sixteenth structural schematic diagram of the piping assembly provided in the embodiment of the present application. Fig.19 This is a seventeenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig. 20 This is an eighteenth structural schematic diagram of the piping assembly provided in the embodiment of the present application. Fig.21 This is a nineteenth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig. 22 This is a twentieth structural schematic diagram of a pipe assembly provided in an embodiment of the present application. Fig.23 This is the twenty-first structural schematic diagram of the piping assembly provided in the embodiment of the present application.

[0173] like Figures 15 to 23As shown, in some other embodiments, the end of the first copper sleeve extends into the first piping body 11, the first piping body 11 has a first end 114 disposed facing the second piping body 21, and the second straight pipe section 2222 has a second end 2223 disposed away from the second piping body 21; in the axial direction of the piping assembly 10, there is a spacing between the first end 114 and the second end 2223, and within the range of the axial spacing, the first piping body 11 and the second straight pipe section 2222 do not overlap in the radial direction of the piping assembly 10.

[0174] The shapes of the first copper sleeve and the first pipe body 11 can be the following.

[0175] like Figures 15 to 17 As shown, the first copper sleeve includes a fourth straight pipe section 121, a third transition pipe section 122 and a fifth straight pipe section 123 which are connected in sequence, and the diameter of the fifth straight pipe section 123 is smaller than the diameter of the fourth straight pipe section 121; the second straight pipe section 2222 is sleeved on the outside of the fourth straight pipe section 121 and connected to the fourth straight pipe section 121, and the fifth straight pipe section 123 extends into the first piping body 11 and is connected to the first piping body 11.

[0176] Furthermore, if Fig.15 As shown, in some embodiments, the first piping body 11 includes a sixth straight pipe segment 115, a fourth transition pipe segment 116 and a seventh straight pipe segment 117 connected in sequence, the diameter of the seventh straight pipe segment 117 is smaller than the diameter of the sixth straight pipe segment 115, and the fifth straight pipe segment 123 extends into the sixth straight pipe segment 115 and is connected to the sixth straight pipe segment 115.

[0177] like Fig.16 As shown, in some other embodiments, the first pipe body 11 is a straight pipe.

[0178] like Fig.17 As shown, in some other embodiments, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the pipe diameter of the seventh straight pipe section 117 is larger than the pipe diameter of the sixth straight pipe section 115, and the fifth straight pipe section 123 extends into the sixth straight pipe section 115 and is connected to the sixth straight pipe section 115.

[0179] like Figures 18 to 20 As shown, in other embodiments, the first copper sleeve is a straight tube.

[0180] Furthermore, if Fig.18 As shown, in some embodiments, the first piping body 11 includes a sixth straight pipe segment 115, a fourth transition pipe segment 116 and a seventh straight pipe segment 117 which are connected in sequence, the diameter of the seventh straight pipe segment 117 is smaller than the diameter of the sixth straight pipe segment 115, and the first copper sleeve extends into the sixth straight pipe segment 115 and is connected to the sixth straight pipe segment 115.

[0181] like Fig.19 As shown, in some other embodiments, the first pipe body 11 is a straight pipe.

[0182] like Fig. 20 As shown, in some other embodiments, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the diameter of the seventh straight pipe section 117 is larger than the diameter of the sixth straight pipe section 115, and the first copper sleeve extends into the sixth straight pipe section 115 and is connected to the sixth straight pipe section 115.

[0183] like Figure 21 to Figure 23 As shown, in some other embodiments, the first copper sleeve includes a fourth straight pipe section 121, a third transition pipe section 122 and a fifth straight pipe section 123 which are connected in sequence, and the diameter of the fifth straight pipe section 123 is larger than the diameter of the fourth straight pipe section 121; the second straight pipe section 2222 is sleeved on the outside of the fourth straight pipe section 121 and connected to the fourth straight pipe section 121, and the fifth straight pipe section 123 extends into the first piping body 11 and is connected to the first piping body 11.

[0184] Furthermore, if Fig.21 As shown, in some embodiments, the first piping body 11 includes a sixth straight pipe segment 115, a fourth transition pipe segment 116 and a seventh straight pipe segment 117 connected in sequence, the diameter of the seventh straight pipe segment 117 is smaller than the diameter of the sixth straight pipe segment 115, and the fifth straight pipe segment 123 extends into the sixth straight pipe segment 115 and is connected to the sixth straight pipe segment 115.

[0185] like Fig. 22 As shown, in some other embodiments, the first pipe body 11 is a straight pipe.

[0186] like Fig.23 As shown, in some other embodiments, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the pipe diameter of the seventh straight pipe section 117 is larger than the pipe diameter of the sixth straight pipe section 115, and the fifth straight pipe section 123 extends into the sixth straight pipe section 115 and is connected to the sixth straight pipe section 115.

[0187] Please combine Figures 24 to 32 , Fig.24 This is a third structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.25 This is a fourth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.26 This is a fifth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig. 27 This is a sixth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.28This is a seventh structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.29 This is an eighth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.30 This is a ninth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.31 This is a tenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.32 This is an eleventh structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application.

[0188] In this embodiment, the second pipe body 21 includes a main body section 211 and an interface pipe section 212 connected together; the other end of the second copper sleeve is sleeved on the outside of the interface pipe section 212 and connected to the interface pipe section 212 .

[0189] like Figure 24 to Figure 26 As shown, the second copper sleeve includes an eighth straight pipe segment 224, a fifth transition pipe segment 225 and a ninth straight pipe segment 226 which are connected in sequence, and the pipe diameter of the eighth straight pipe segment 224 is larger than the pipe diameter of the ninth straight pipe segment 226; the eighth straight pipe segment 224 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment 226 is sleeved on the outside of the interface pipe segment 212 and connected to the interface pipe segment 212.

[0190] Furthermore, if Fig.24 As shown, in some embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is larger than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 is sleeved on the outside of the first interface straight pipe segment 2121 and connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0191] like Fig.25 As shown, in other embodiments, the interface pipe section 212 is a straight pipe.

[0192] like Fig.26 As shown, in some other embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is smaller than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 is sleeved on the outside of the first interface straight pipe segment 2121 and connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0193] like Figure 27 to Figure 29 As shown, in other embodiments, the second copper sleeve is a straight tube.

[0194] Furthermore, if Fig. 27 As shown, in some embodiments, the interface pipe section 212 includes a first interface straight pipe section 2121, a first interface transition pipe section 2122, and a second interface straight pipe section 2123 connected in sequence, the pipe diameter of the first interface straight pipe section 2121 is larger than the pipe diameter of the second interface straight pipe section 2123, the second copper sleeve is arranged on the outside of the first interface straight pipe section 2121 and connected to the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected to the main section 211.

[0195] like Fig.28 As shown, in other embodiments, the interface pipe section 212 is a straight pipe.

[0196] like Fig.29 As shown, in some other embodiments, the interface pipe section 212 includes a first interface straight pipe section 2121, a first interface transition pipe section 2122, and a second interface straight pipe section 2123 connected in sequence, the pipe diameter of the first interface straight pipe section 2121 is smaller than the pipe diameter of the second interface straight pipe section 2123, the second copper sleeve is arranged on the outside of the first interface straight pipe section 2121 and connected to the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected to the main section 211.

[0197] like Figure 30 to Figure 32 As shown, in some other embodiments, the second copper sleeve includes an eighth straight pipe segment 224, a fifth transition pipe segment 225 and a ninth straight pipe segment 226 which are connected in sequence, and the pipe diameter of the eighth straight pipe segment 224 is smaller than the pipe diameter of the ninth straight pipe segment 226; the eighth straight pipe segment 224 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment 226 is sleeved on the outside of the interface pipe segment 212 and connected to the interface pipe segment 212.

[0198] Furthermore, if Fig.30 As shown, in some embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is larger than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 is sleeved on the outside of the first interface straight pipe segment 2121 and connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0199] like Fig.31 As shown, in other embodiments, the interface pipe section 212 is a straight pipe.

[0200] like Fig.32As shown, in some other embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is smaller than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 is sleeved on the outside of the first interface straight pipe segment 2121 and connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0201] like Figure 27 to Figure 29 As shown, in some optional embodiments, in order to improve the welding efficiency between the first pipe 1 and the second pipe 2, that is, in order to improve the welding efficiency between the first copper sleeve and the second copper sleeve, a first limiting ring 23 protruding toward the middle of the second copper sleeve is provided on the inner wall of the second copper sleeve; the first limiting ring 23 is used to limit the relative position between the first copper sleeve and the second copper sleeve. In this way, before welding the first copper sleeve and the second copper sleeve, the first copper sleeve and the second copper sleeve can be limited by the first limiting ring 23, that is, the end of the first copper sleeve is abutted against the first limiting ring 23, so that in the subsequent welding process, the first copper sleeve and the second copper sleeve can be quickly welded together, thereby improving the connection efficiency of the pipe assembly 10 provided in this embodiment.

[0202] Please continue to combine Figures 33 to 41 , Fig.33 This is a twelfth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.34 This is a thirteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application. Fig.35 This is a fourteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.36 This is a fifteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.37 This is a sixteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.38 This is a seventeenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.39 This is an eighteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.40 This is a nineteenth structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.41 This is a twentieth structural schematic diagram of the second piping in the piping assembly provided in an embodiment of the present application.

[0203] like Figures 33 to 41As shown, in other embodiments, the second copper sleeve can be plugged into the inner side of the second piping body 21. Specifically, the second piping body 21 includes a main body section 211 and an interface pipe section 212 connected together; one end of the second copper sleeve is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the other end of the second copper sleeve extends into the interface pipe section 212 and is connected to the interface pipe section 212.

[0204] like Figure 33 to Figure 35 As shown, in some embodiments, the second copper sleeve includes an eighth straight pipe segment 224, a fifth transition pipe segment 225 and a ninth straight pipe segment 226 connected in sequence, and the diameter of the eighth straight pipe segment 224 is larger than the diameter of the ninth straight pipe segment 226; the eighth straight pipe segment 224 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment 226 extends into the interface pipe segment 212 and is connected to the interface pipe segment 212.

[0205] Furthermore, if Fig.33 As shown, in some embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 which are connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is larger than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and is connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0206] like Fig.34 As shown, in other embodiments, the interface pipe section 212 is a straight pipe.

[0207] like Fig.35 As shown, in some other embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 which are connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is smaller than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and is connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main body segment 211.

[0208] like Figure 36 to Figure 38 As shown, in other embodiments, the second copper sleeve is a straight tube.

[0209] Furthermore, if Fig.36As shown, in some embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 which are connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is larger than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and is connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0210] like Fig.37 As shown, in other embodiments, the interface pipe section 212 is a straight pipe.

[0211] like Fig.38 As shown, in some other embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 which are connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is smaller than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and is connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main body segment 211.

[0212] like Figure 39 to Figure 41 As shown, in some other embodiments, the second copper sleeve includes an eighth straight pipe segment 224, a fifth transition pipe segment 225 and a ninth straight pipe segment 226 which are connected in sequence, and the diameter of the eighth straight pipe segment 224 is smaller than the diameter of the ninth straight pipe segment 226; the eighth straight pipe segment 224 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe segment 226 extends into the interface pipe segment 212 and is connected to the interface pipe segment 212.

[0213] Furthermore, if Fig.39 As shown, in some embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 which are connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is larger than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and is connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main segment 211.

[0214] like Fig.40 As shown, in other embodiments, the interface pipe section 212 is a straight pipe.

[0215] like Fig.41As shown, in some other embodiments, the interface pipe segment 212 includes a first interface straight pipe segment 2121, a first interface transition pipe segment 2122, and a second interface straight pipe segment 2123 which are connected in sequence, the pipe diameter of the first interface straight pipe segment 2121 is smaller than the pipe diameter of the second interface straight pipe segment 2123, the ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and is connected to the first interface straight pipe segment 2121, and the second interface straight pipe segment 2123 is connected to the main body segment 211.

[0216] like Figure 36 to Figure 38 As shown, in order to determine the relative position between the first copper sleeve and the second copper sleeve to improve the welding efficiency of the first copper sleeve and the second copper sleeve, in some optional embodiments, a first limiting ring 23 protruding toward the middle of the second copper sleeve is provided on the inner wall of the second copper sleeve; the first limiting ring 23 is used to limit the relative position between the first copper sleeve and the second copper sleeve. In this way, the connection efficiency between the first pipe 1 and the second pipe 2 can be improved, that is, the connection efficiency of the pipe assembly 10 provided in this embodiment can be improved.

[0217] Please combine Figure 2 , Figure 3 , Figure 42 to Figure 45 , Fig.42 A twenty-first structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.43 This is a twenty-second structural schematic diagram of the second piping in the piping assembly provided in an embodiment of the present application, Fig.44 This is a twenty-third structural schematic diagram of the second pipe in the pipe assembly provided in an embodiment of the present application, Fig.45 This is a twenty-fourth structural schematic diagram of the second piping in the piping assembly provided in the embodiment of the present application. Figure 2 , Figure 3 , Figure 42 to Figure 45 As shown, in some optional embodiments, the inner surface of the second pipe body 21 is plated with a second copper layer, and in other optional embodiments, both the inner surface and the outer surface of the second pipe body 21 are plated with a second copper layer.

[0218] The following is a detailed introduction to the structures of different second pipe bodies 21 .

[0219] like Fig.42 and Fig.43 As shown, the interface pipe section 212 includes a first interface straight pipe section 2121, a first interface transition pipe section 2122 and a second interface straight pipe section 2123 which are connected in sequence. The diameter of the first interface straight pipe section 2121 is larger than the diameter of the second interface straight pipe section 2123. The first interface straight pipe section 2121 is connected to the first connecting portion 12, and the second interface straight pipe section 2123 is connected to the main section 211.

[0220] Among them, Fig.42In the structure, a second copper layer is plated on the inner surface of the second pipe body 21; Fig.43 , a specific structure is shown in which the second copper layer is plated on both the inner surface and the outer surface of the second pipe body 21 .

[0221] like Figure 2 and Figure 3 As shown, the interface pipe section 212 can also be a straight pipe, and one end of the interface pipe section 212 is connected to the first connecting portion 12 , and the other end of the interface pipe section 212 is connected to the main body section 211 .

[0222] like Fig.44 and Fig.45 As shown, the interface pipe section 212 includes a first interface straight pipe section 2121, a first interface transition pipe section 2122 and a second interface straight pipe section 2123 which are connected in sequence. The pipe diameter of the first interface straight pipe section 2121 is smaller than the pipe diameter of the second interface straight pipe section 2123. The first interface straight pipe section 2121 is connected to the first piping 1, and the second interface straight pipe section 2123 is connected to the main section 211.

[0223] in, Fig.44 A structural diagram showing a second copper layer plated on the inner surface and end surface of the second pipe body 21; Fig.45 This is a structural diagram in which a second copper layer is plated on both the inner surface and the outer surface of the second pipe body 21 .

[0224] Of course, in the case where the second pipe body 21 is plated with a second copper layer, if the relative position between the first pipe 1 and the second pipe 2 needs to be limited, then a second limiting ring 213 protruding toward the middle of the interface pipe section 212 needs to be provided on the inner wall of the interface pipe section 212; the second limiting ring 213 is used to limit the relative position between the first pipe 1 and the second pipe 2, see Figure 2 , Figure 3 , Fig.44 and Fig.45 Thus, by providing the second limiting ring 213 on the inner wall of the interface pipe section 212, when connecting the first pipe 1 and the second pipe 2, the first pipe 1 and the second pipe 2 can be positioned first and then welded, thereby improving the connection efficiency between the first pipe 1 and the second pipe 2.

[0225] It is understandable that when the length of the transmission pipe on the refrigerant circulation loop connected to the second pipe 2 is greater than the preset length of the pipe, it is necessary to set an extension pipe at the end of the first pipe 1 away from the second pipe 2. Fig.46 and Fig.47 , Fig.46 The twenty-second structural schematic diagram of the piping assembly provided in the embodiment of the present application is as follows: Fig.47This is the twenty-third structural schematic diagram of the piping assembly provided in the embodiment of the present application. As shown in the figure, the piping assembly 10 provided in this embodiment also includes a third piping 3; the third piping 3 is connected to the end of the first piping 1 away from the second piping 2, and specifically, the third piping 3 is connected to the end of the first piping body 11. In this way, through the provision of the third piping 3, the length of the piping assembly 10 provided in this embodiment is adjustable to meet the requirements of piping of different lengths in HVAC equipment.

[0226] There are two possible connection modes between the third pipe 3 and the first pipe 1 .

[0227] Specifically, Fig.46 As shown, in some embodiments, the pipe opening of the third pipe 3 is arranged opposite to the pipe opening of the first pipe 1, that is, after the third pipe 3 is manufactured externally, the third pipe 3 and the first pipe 1 can be welded together by fusion welding.

[0228] like Fig.47 As shown, in other embodiments, the third pipe 3 extends into the first pipe 1 and is connected to the first pipe 1, that is, after the third pipe 3 is manufactured externally, the third pipe 3 and the first pipe 1 can be welded together by fusion welding.

[0229] It should be noted that, in this case, any one of the above-mentioned embodiments may be adopted for the structure of the first pipe 1 and the second pipe 2 .

[0230] exist Fig.46 In the figure, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence. The diameter of the sixth straight pipe section 115 is smaller than the diameter of the seventh straight pipe section 117. The first copper sleeve is arranged on the outside of the sixth straight pipe section 115 and connected to the sixth straight pipe section 115. The seventh straight pipe section 117 is connected to the third piping.

[0231] The second copper sleeve includes a first straight pipe section 221 and a first flared section 222 and a second flared section 223 connected at both ends of the first straight pipe section 221; the first flared section 222 includes a first transition pipe section 2221 and a second straight pipe section 2222 connected together, the first transition pipe section 2221 is connected between one end of the first straight pipe section 221 and the end of the second straight pipe section 2222, the second straight pipe section 2222 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve; the second flared section 223 includes a second transition pipe section 2221 and a second straight pipe section 2222 connected together The second transition pipe section 2231 and the third straight pipe section 2232, the second transition pipe section 2231 is connected between the other end of the first straight pipe section 221 and the end of the third straight pipe section 2232, the third straight pipe section 2232 is sleeved on the outside of the second piping body 21 and connected to the second piping body 21; wherein, the pipe diameter of the second straight pipe section 2222 and the pipe diameter of the third straight pipe section 2232 are both larger than the pipe diameter of the first straight pipe section 221, and the sixth straight pipe section 115 overlaps with the second straight pipe section 2222 in the radial direction of the piping assembly 10.

[0232] The second pipe body 21 includes a main body section 211 and an interface pipe section 212 connected to the main body section 211 , and the interface pipe section 212 is a straight pipe section. The third straight pipe section 2232 is sleeved on the outside of the interface pipe section 212 and connected to the interface pipe section 212 .

[0233] exist Fig.47 In, with Fig.46 The structure shown in FIG. 1 is different from that shown in FIG. 1 in that the structure of the first piping body 11 is different. In the present specific embodiment, the first piping body 11 includes an eighth straight pipe 118, a fifth transition pipe 119, a ninth straight pipe 1110, a sixth transition pipe 1120 and a tenth straight pipe 1130 which are connected in sequence, wherein the diameter of the eighth straight pipe 118 is smaller than the diameter of the ninth straight pipe 1110, the diameter of the ninth straight pipe 1110 is smaller than the diameter of the tenth straight pipe 1130, and the first copper sleeve is arranged on the outside of the eighth straight pipe 118 and connected to the eighth straight pipe 118, the eighth straight pipe 118 overlaps with the second straight pipe section 2222 in the radial direction of the piping assembly 10, and the third piping 3 extends into the tenth straight pipe 1130 and is connected to the tenth straight pipe 1130.

[0234] It should be noted that Fig.46 and Fig.47 The third pipes 3 shown in the figure are all straight pipes, but in other embodiments, the third pipes 3 may also be formed by connecting pipe sections with different diameters. Here, the shape of the third pipes 3 is not specifically limited.

[0235] Of course, if the gap between the third pipe 3 and the first pipe 1 is uneven, the third pipe 3 and the first pipe 1 will not be coaxial, so the solder filled between the third pipe 3 and the first pipe 1 will be uneven, which will affect the reliability of the connection between the third pipe 3 and the first pipe 1. Therefore, please combine Fig.48 , Fig.48 A schematic diagram of the planar structure of the third piping in the piping assembly provided in the embodiment of the present application. As shown in the figure, in the present embodiment, a plurality of positioning ribs 31 are arranged on the outer wall of the third piping 3 and are distributed at intervals along the circumference of the third piping 3, and the positioning ribs 31 are stopped on the inner wall surface of the first piping 1. Specifically, the third piping 3 includes a third piping body 32, and a plurality of positioning ribs 31 are arranged on the outer wall of the third piping body 32 and are distributed at intervals along the circumference of the third piping body 32, wherein the positioning ribs 31 can be integrally formed with the third piping body 32 by stamping or the like, and the positioning ribs 31 can also be directly welded to the outer wall of the third piping body 32 after being manufactured, and the outer contour shape of the positioning ribs 31 can be an arc. Here, there is no specific restriction on the arrangement method of the positioning ribs 31 and the shape of the positioning ribs 31.

[0236] Therefore, by setting the above-mentioned positioning rib 31, the gap formed between the third piping 3 and the first piping 1 can be filled to ensure the coaxial setting of the third piping 3 and the first piping 1, thereby improving the uniformity of the solder filled between the third piping 3 and the first piping 1, and further improving the connection reliability between the third piping 3 and the first piping 1.

[0237] Of course, the above-mentioned multiple positioning ribs 31 should maintain the same shape and size. Here, the shape and size of the positioning ribs 31 are not specifically limited.

[0238] During the welding process of the first pipe 1 and the second pipe 2, the solder may fall off. If the solder falls into the refrigerant container, it will affect the performance of the refrigerant container. Fig.49 , Fig.49 This is the twenty-fourth structural schematic diagram of the piping assembly provided in the embodiment of the present application.

[0239] As shown in the figure, in some optional embodiments, in order to avoid this phenomenon to a certain extent, a filter assembly 4 is provided in the second pipe 2. The specific structures of the first pipe 1 and the second pipe 2 are similar to those of the first pipe 1 and the second pipe 2. Fig.46 The difference is that the end of the interface pipe section 212 of the second pipe body 21 extends to the middle position of the second straight pipe section 2222 , that is, the interface pipe section 212 and the second straight pipe section 2222 overlap in the radial direction of the pipe assembly 10 .

[0240] The specific structure of the filter assembly 4 can be to directly weld a metal filter inside the interface pipe section 212, or to weld a metal bracket inside the interface pipe section 212, on which the filter is arranged. Here, the structure of the filter assembly 4 is not specifically limited, as long as it can prevent the solder from falling into the refrigerant container.

[0241] Thus, by setting the filter assembly 4, the solder can be prevented from falling into the refrigerant container to a certain extent during the welding process of the first pipe 1 and the second pipe 2, so that the refrigerant container can maintain good performance.

[0242] In order to further improve the connection reliability between the first pipe 1 and the second pipe 2, as Fig.49 As shown, in some embodiments, an annular material storage tank 5 with a notch facing the first pipe 1 is formed between the second copper sleeve and the second pipe body 21; the end of the first copper sleeve is confined in the annular material storage tank 5. In this way, the first copper sleeve and the second copper sleeve can be connected by more solder, and this part of the solder is contained in the annular material storage tank 5, so that the connection reliability between the first copper sleeve and the second copper sleeve can be improved, and then the connection reliability between the first pipe 1 and the second pipe 2 can be improved, so that the structural stability of the pipe assembly 10 provided in this embodiment can be improved.

[0243] In order to improve the connection reliability between the first pipe 1 and the second pipe 2 and to improve the uniformity of the solder distribution, some size parameters of the pipe assembly 10 are also limited in this embodiment, such as Figure 1 As shown, in some embodiments, the first piping body 11 has a first end 114 disposed facing the second piping body 21, and the first copper sleeve has a third end 124 disposed facing the second piping body 21; the third end 124 is disposed closer to the second piping body 21 than the first end 114.

[0244] Furthermore, the first copper sleeve has a fourth end 125 arranged opposite to the third end 124; the second copper sleeve has a fifth end 227 arranged away from the second piping body 21, and the fifth end 227 is arranged closer to the second piping body 21 than the fourth end 125, and the axial distance L1 between the fourth end 125 and the fifth end 227 in the piping assembly 10 is greater than or equal to 20 mm, and the distance L2 between the fourth end 125 and the first end 114 is greater than or equal to 30 mm.

[0245] In this way, by limiting the above-mentioned interval, the solder can be evenly distributed when the first pipe 1 and the second pipe 2 are welded, so as to further improve the connection reliability between the first pipe 1 and the second pipe 2 .

[0246] In some specific embodiments, the first pipe body 11 and the second pipe body 21 are both seamed steel pipes. By using seamed steel pipes, the first pipe body 11 and the second pipe body 21 can be applied to more sizes and have stronger corrosion resistance.

[0247] In order to make the solder distribution uniform when welding the first pipe 1 and the second pipe 2, so as to improve the connection reliability between the first pipe 1 and the second pipe 2, in some embodiments, the first pipe 1 and the second pipe 2 are coaxially arranged. In this way, the uniformity of the solder used when welding the first pipe 1 and the second pipe 2 can be improved, so as to further improve the reliability of the connection between the first pipe 1 and the second pipe 2.

[0248] It can be understood that if the melting point of the solder selected for welding the first connection part 12 and the second connection part 22 is low, it is convenient to carry out maintenance of the piping assembly 10 later, that is, it is convenient to separate the first piping 1 and the second piping 2. Therefore, in some embodiments, the first piping body 11 and the first connection part 12 are welded together by the first solder, the first connection part 12 and the second connection part 22 are welded together by the second solder, and the second piping body 21 and the second connection part 22 are welded together by the third solder; the melting points of the first solder and the third solder are both greater than the melting point of the second solder. With such arrangement, when the piping assembly 10 is inspected and repaired at a later stage, when the second solder is melted, since the melting points of the first solder and the third solder are both greater than the melting point of the second solder, the first solder and the third solder will not be affected. In other words, after the connection between the first connection part 12 and the second connection part 22 is disconnected, the connection between the first piping body 11 and the first connection part 12 and the connection between the second piping body 21 and the second connection part 22 will not be affected, thereby improving the convenience of inspecting the piping assembly 10.

[0249] Please combine Fig.50 , Fig.50 This is a three-dimensional structural diagram of the partial structure of the heating ventilation equipment provided in the embodiment of the present application. This embodiment also provides a heating ventilation equipment, which has a refrigerant circulation loop, and the refrigerant circulation loop includes a refrigerant container and the piping assembly 10 in the above embodiment; wherein the refrigerant container is any one of the compressor 20, the oil separator 30 and the gas-liquid separator 40, and the refrigerant container is made of steel.

[0250] Please combine Figure 51 to Figure 54 , Fig.51 This is a schematic diagram of the three-dimensional structure of a compressor in a HVAC device provided in an embodiment of the present application. Fig.52 This is a schematic diagram of the three-dimensional structure of the compressor in the HVAC equipment provided in the embodiment of the present application from another perspective. Fig.53 This is a schematic diagram of the three-dimensional structure of the oil separator provided in the embodiment of the present application. Fig.54 A schematic diagram of the three-dimensional structure of the gas-liquid separator provided in an embodiment of the present application.

[0251] like Fig.51 and Fig.52As shown, when the refrigerant container is a compressor 20; the first piping 1 is constructed as an exhaust transmission pipe, and the first piping body 11 has at least one first bending portion; and the second piping 2 is constructed as an outlet pipe for exhaust of the compressor 20, that is, the first exhaust pipe 201 of the compressor 20.

[0252] Furthermore, the other axial end of the first piping body 11 includes another first connection portion 12, which is connected to another refrigerant container, and the other refrigerant container is an oil separator 30; the inlet pipe of the oil separator 30 is configured as a second piping 2, that is, the first air intake pipe 301 of the oil separator 30 is configured as a second piping 2, and the other first connection portion 12 is connected to the second connection portion 22 of the inlet pipe of the oil separator 30.

[0253] The oil separator 30 further includes a first separation body 302, in which a first separation chamber is formed, and the main component of the first separation chamber is made of steel, that is, the main component of the first separation body 302 is made of steel; the second piping body 21 of the inlet pipe of the oil separator 30 is vertically inserted into the first separation chamber, and the second piping body 21 has at least one second bending portion 3011, that is, the second piping body 21 of the first intake pipe 301 is vertically inserted into the first separation chamber, and the first intake pipe 301 has at least one second bending portion 3011.

[0254] Of course, the oil separator 30 also includes a second exhaust pipe 303, and the outlet pipe of the oil separator 30 is configured as a second pipe 2, that is, the second exhaust pipe 303 is configured as a second pipe 2; the second pipe body 21 of the outlet pipe is axially inserted into the first separation chamber, and the second pipe body 21 of the second exhaust pipe 303 is axially inserted into the first separation chamber.

[0255] The first air inlet pipe 301 is disposed on the side of the first separation body 302 , and the second air outlet pipe 303 is disposed on the top of the first separation body 302 .

[0256] It can be understood that the gas-liquid separator 40 is also connected to the compressor 20, that is, the other axial end of the first piping body 11 includes another first connection part 12, and the other first connection part 12 is connected to another refrigerant container, and the other refrigerant container is the gas-liquid separator 40; the inlet connecting pipe of the gas-liquid separator 40 is constructed as the second piping 2, and the other first connection part 12 is connected to the second connection part 22 of the inlet connecting pipe of the gas-liquid separator 40, that is, the second air intake pipe 401 of the gas-liquid separator 40 is constructed as the second piping 2, and the other first connection part 12 is connected to the second connection part 22 of the second air intake pipe 401.

[0257] The gas-liquid separator 40 further includes a second separation body 402, a second separation chamber is formed inside the second separation body 402, and the main component of the second separation chamber is made of steel, that is, the main component of the second separation body 402 is made of steel; the second piping body 21 of the inlet pipe of the gas-liquid separator 40 is axially inserted into the second separation chamber, and is eccentrically arranged relative to the axial center line of the second separation chamber, that is, the second piping body 21 of the second intake pipe 401 is axially inserted into the second separation chamber, and is eccentrically arranged relative to the axial center line of the second separation chamber.

[0258] Furthermore, the gas-liquid separator 40 also includes a third exhaust pipe 403, and the outlet connecting pipe of the gas-liquid separator 40 is configured as a second piping 2, that is, the third exhaust pipe 403 is configured as a second piping 2; the second piping body 21 of the outlet connecting pipe is axially inserted into the second separation chamber, and is eccentrically arranged relative to the axial center line of the second separation chamber, that is, the second piping body 21 of the third exhaust pipe 403 is axially inserted into the second separation chamber, and is eccentrically arranged relative to the axial center line of the second separation chamber; and the part of the outlet connecting pipe inserted into the second separation chamber is connected together with the part of the inlet connecting pipe inserted into the second separation chamber, that is, the part of the third exhaust pipe 403 inserted into the second separation chamber is connected together with the part of the second intake pipe 401 inserted into the second separation chamber.

[0259] The second air inlet pipe 401 and the third air outlet pipe 403 are both arranged on the top of the second separation body 402 .

[0260] It is understandable that the compressor 20 should also be provided with an intake pipe 202 and an injection pipe 203, both of which are arranged at the top of the compressor 20; the oil separator 30 should also include an oil drain pipe 304 arranged at the bottom of the first separation body 302; the gas-liquid separator 40 should also include a gas balance pipe 404 and a liquid balance pipe 405 arranged at the top of the second separation body 402.

[0261] In this embodiment, specific implementation methods are provided for some interface pipes of the compressor 20 , the oil separator 30 , and the gas-liquid separator 40 .

[0262] like Figure 55 to Figure 57 As shown, Fig.55 A schematic diagram of a first structure of connecting the exhaust pipe of a compressor and a transmission pipe in a HVAC device provided in an embodiment of the present application, Fig.56 A second structural schematic diagram of the connection between the exhaust pipe and the transmission pipe of the compressor in the HVAC equipment provided in the embodiment of the present application, Fig.57 A third structural schematic diagram of the connection between the exhaust pipe of the compressor and the transmission pipe in the HVAC equipment provided in an embodiment of the present application.

[0263] like Fig.55As shown, in a specific embodiment, the first exhaust pipe 201 is constructed as the second pipe 2, the interface pipe section 212 of the first exhaust pipe 201 is a straight pipe section, the second connecting portion 22 is a second copper sleeve, the second copper sleeve is sleeved on the outside of the interface pipe section 212, and the outer wall surface of the second copper sleeve is provided with a third limiting ring 24 protruding outward, the third limiting ring 24 is used to limit the second copper sleeve and the interface pipe section 212; the first connecting portion 12 is a first copper sleeve, the second copper sleeve is sleeved on the first copper sleeve The outer side of the sleeve, and the inner wall surface of the second copper sleeve is provided with a fourth limiting ring 25, the fourth limiting ring 25 is used to limit the positional relationship between the first copper sleeve and the second copper sleeve; the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 connected in sequence, the diameter of the sixth straight pipe section 115 is smaller than the diameter of the seventh straight pipe section 117, the first copper sleeve is provided on the outer side of the sixth straight pipe section 115 and connected to the sixth straight pipe section 115, the sixth straight pipe section 115 and the second

[0264] like Fig.56 As shown, in another specific embodiment, with Fig.55 The difference is that the end of the seventh straight pipe section 117 is butt-jointed to the third pipe 3 by fusion welding.

[0265] like Fig.57 As shown, in another specific embodiment, with Fig.55 The difference is that the first piping body 11 includes an eighth straight pipe 118, a fifth transition pipe 119, a ninth straight pipe 1110, a sixth transition pipe 1120 and a tenth straight pipe 1130 which are connected in sequence, wherein the diameter of the eighth straight pipe 118 is smaller than the diameter of the ninth straight pipe 1110, the diameter of the ninth straight pipe 1110 is smaller than the diameter of the tenth straight pipe 1130, and the first copper sleeve is arranged on the outside of the eighth straight pipe 118 and connected to the eighth straight pipe 118, the eighth straight pipe 118 and the second copper sleeve overlap in the radial direction of the piping assembly 10, and the end of the tenth straight pipe 1130 is overlapped with the third piping 3 by fusion welding.

[0266] It should be noted that, in this embodiment, a third bending portion 2011 is formed on the main section 211 of the first exhaust pipe 201 .

[0267] Please combine Fig.58 , Fig.58 A schematic structural diagram of the connection between the first air inlet pipe or the second air outlet pipe of the oil separator in the HVAC equipment provided in an embodiment of the present application and the transmission pipe.

[0268] In a specific embodiment, the first air intake pipe 301 and the second exhaust pipe 303 are constructed as the second pipe 2, and the interface pipe section 212 of the second pipe 2 includes a first interface straight pipe section 2121, a first interface transition pipe section 2122, and a second interface straight pipe section 2123 connected in sequence, the pipe diameter of the first interface straight pipe section 2121 is larger than the pipe diameter of the second interface straight pipe section 2123, the first interface straight pipe section 2121 is connected to the second copper sleeve, the second interface straight pipe section 2123 is connected to the main section 211, and the first interface straight pipe section 2121 is connected to the second copper sleeve, and the second interface straight pipe section 2123 is connected to the main section 211. 21 is sleeved on the outside of the second copper sleeve and connected to the second copper sleeve, the second copper sleeve is sleeved on the outside of the first copper sleeve, and the first copper sleeve overlaps with the first interface straight pipe section 2121 in the radial direction, the first piping body 11 includes a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 which are connected in sequence, the diameter of the sixth straight pipe section 115 is smaller than the diameter of the seventh straight pipe section 117, the first copper sleeve is sleeved on the outside of the sixth straight pipe section 115 and connected to the sixth straight pipe section 115, and the sixth straight pipe section 115 overlaps with the second copper sleeve in the radial direction.

[0269] Please combine Fig.59 , Fig.59 A schematic structural diagram of the connection between the second air inlet pipe or the third air outlet pipe of the gas-liquid separator in the HVAC equipment provided in an embodiment of the present application and the transmission pipe.

[0270] In a specific embodiment, the second air intake pipe 401 and the third exhaust pipe 403 are constructed as a second pipe 2, and the interface pipe section 212 of the second pipe 2 includes a first interface straight pipe section 2121, a first interface transition pipe section 2122, and a second interface straight pipe section 2123 connected in sequence, the pipe diameter of the first interface straight pipe section 2121 is larger than the pipe diameter of the second interface straight pipe section 2123, the pipe diameter of the first interface straight pipe section 2121 is larger than the pipe diameter of the second interface straight pipe section 2123, and the inner diameter of the first interface straight pipe section 2121 is larger than the inner diameter of the second interface straight pipe section 2123. The wall is copper-plated and connected to the first copper sleeve. The first copper sleeve includes a fourth straight pipe section 121, a third transition pipe section 122 and a fifth straight pipe section 123 which are connected in sequence. The diameter of the fifth straight pipe section 123 is larger than the diameter of the fourth straight pipe section 121. The main section 211 and the first piping body 11 are both straight pipe sections. The first interface straight pipe section 2121 is sleeved on the outside of the fourth straight pipe section 121. The fifth straight pipe section 123 is sleeved on the outside of the first piping body 11. The first piping body 11 and the first interface straight pipe section 2121 have no overlap in the radial direction.

[0271] like Fig.50As shown, the outdoor unit in the HVAC equipment provided in this embodiment should also include a four-way valve 50 connected to the oil separator 30, an outdoor unit heat exchanger 60 connected to the four-way valve 50, a filter 70 connected to the outdoor unit heat exchanger 60, an electronic expansion valve 80 connected to the filter 70, a refrigerant heat dissipation device 90 connected to the electronic expansion valve 80, etc. Of course, the HVAC equipment provided in this embodiment should also include an indoor unit 100 connected to the outdoor unit.

[0272] It should be noted that the HVAC equipment provided in this embodiment may be a multi-split air conditioning system, that is, there may be multiple indoor units 100, and the number of indoor units 100 is not specifically limited.

[0273] Please combine Fig.60 and Fig.61 , Fig.60 A refrigerant flow diagram of the HVAC equipment during cooling provided in the embodiment of the present application, Fig.61 This is a refrigerant flow diagram of the HVAC equipment during heating provided in the embodiment of the present application. Fig.60 and Fig.61 The HVAC equipment shown has two compressors 20 and three indoor units 100. The following introduction to the refrigerant flow will take one compressor 20 and one indoor unit 100 as an example. The refrigerant flow in another compressor 20 and other indoor units 100 can refer to this introduction.

[0274] Specifically, Fig.60 As shown, when the HVAC equipment is in cooling mode, the refrigerant flows as follows: compressor 20 → oil separator 30 → four-way valve 50 → outdoor unit heat exchanger 60 → filter 70 → electronic expansion valve 80 → refrigerant heat dissipation device 90 → indoor unit 100 → four-way valve 50 → gas-liquid separator 40 → compressor 20.

[0275] It should be noted that in the refrigeration mode, when the refrigerant flows to the downstream of the refrigerant heat dissipation device 90, part of the refrigerant will be diverted out. At this time, if it is necessary to replenish air to the compressor 20, the flow direction of this part of the refrigerant should be the refrigerant heat dissipation device 90→compressor 20; if it is not necessary to replenish air to the compressor 20, the flow direction of this part of the refrigerant should be the refrigerant heat dissipation device 90→gas-liquid separator 40→compressor 20.

[0276] like Fig.61 As shown, when the HVAC equipment is in heating mode, the refrigerant flows as follows: compressor 20 → oil separator 30 → four-way valve 50 → indoor unit 100 → refrigerant heat dissipation device 90 → electronic expansion valve 80 → filter 70 → outdoor unit heat exchanger 60 → gas-liquid separator 40 → compressor 20.

[0277] It should be noted that in the heating mode, when the refrigerant flows to the upstream of the refrigerant heat dissipation device 90, part of the refrigerant will be diverted out. At this time, if it is necessary to replenish air to the compressor 20, the flow direction of this part of the refrigerant should be the indoor unit 100→compressor 20; if it is not necessary to replenish air to the compressor 20, the flow direction of this part of the refrigerant should be the indoor unit 100→gas-liquid separator 40→compressor 20.

[0278] The HVAC equipment provided in this embodiment can reduce the difficulty of manufacturing the HVAC equipment by adopting the above-mentioned piping assembly 10.

Claims

1. A piping assembly, characterized in that: The invention comprises a first pipe and a second pipe, wherein the first pipe is configured as a transmission pipe on a refrigerant circulation loop, and the second pipe is configured as an inlet pipe or an outlet pipe of a refrigerant container on the refrigerant circulation loop; The first pipe includes a first pipe body and a first connection portion connected together, the second pipe includes a second pipe body and a second connection portion connected together, and the first connection portion and the second connection portion are connected together; The first pipe body is made of stainless steel, at least part of the first connection part is made of copper or copper alloy, the second pipe body is made of steel, and the connection part between the second connection part and the first connection part is made of copper or copper alloy.

2. The pipe assembly according to claim 1, wherein: The first connection portion is a first copper sleeve or a first copper layer plated on the first pipe body, and the second connection portion is a second copper sleeve or a second copper layer plated on the second pipe body.

3. The pipe assembly according to claim 2, wherein: The first connecting part is a first copper sleeve, and the second connecting part is a second copper sleeve.

4. The pipe assembly according to claim 3, wherein: One end of the second copper sleeve is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the other end of the second copper sleeve is sleeved on the outside of the second pipe body and connected to the second pipe body.

5. The pipe assembly according to claim 4, wherein: The second copper sleeve comprises a first straight pipe section and a first flared section and a second flared section connected at two ends of the first straight pipe section; The first expansion section includes a first transition pipe section and a second straight pipe section connected together, the first transition pipe section is connected between one end of the first straight pipe section and the end of the second straight pipe section, and the second straight pipe section is sleeved outside the first copper sleeve and connected to the first copper sleeve; The second expansion section includes a second transition pipe section and a third straight pipe section connected together, the second transition pipe section is connected between the other end of the first straight pipe section and the end of the third straight pipe section, and the third straight pipe section is sleeved outside the second piping body and connected to the second piping body; The diameter of the second straight pipe section and the diameter of the third straight pipe section are both greater than the diameter of the first straight pipe section.

6. The pipe assembly according to claim 5, wherein: The first copper sleeve is arranged on the outside of the first pipe body; The first copper sleeve is a straight pipe, and a partial structure of the first pipe body and a partial structure of the second straight pipe section overlap in the radial direction of the pipe assembly.

7. The pipe assembly according to claim 6, wherein: The first pipe body is a straight pipe; or, The first pipe body comprises a first pipe section, a first connecting pipe section and a second pipe section which are connected in sequence, the first pipe section and the second pipe section are both straight pipes, and the diameter of the second pipe section is smaller than the diameter of the first pipe section; The first copper sleeve is arranged outside the first pipe section, and the first pipe section and the second straight pipe section overlap in the radial direction of the pipe assembly.

8. The pipe assembly according to claim 5, wherein: The first copper sleeve is arranged outside the first pipe body, the first pipe body has a first end portion arranged facing the second pipe body, and the second straight pipe section has a second end portion arranged away from the second pipe body; In the axial direction of the pipe assembly, there is a distance between the first end and the second end, and within the range of the axial distance, the first pipe body and the second straight pipe section do not overlap in the radial direction of the pipe assembly.

9. The pipe assembly according to claim 8, wherein: The first copper sleeve comprises a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section which are connected in sequence, and the diameter of the fifth straight pipe section is smaller than the diameter of the fourth straight pipe section; The second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section is sleeved on the outside of the first piping body and connected to the first piping body.

10. The pipe assembly according to claim 9, wherein: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected to the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the fifth straight pipe section is sleeved on the outside of the sixth straight pipe section and connected to the sixth straight pipe section.

11. The pipe assembly according to claim 8, wherein: The first copper sleeve is a straight tube: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the first copper sleeve is arranged outside the sixth straight pipe section and connected to the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the first copper sleeve is arranged on the outside of the sixth straight pipe section and connected to the sixth straight pipe section.

12. The pipe assembly according to claim 8, wherein: The first copper sleeve comprises a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section which are connected in sequence, and the pipe diameter of the fifth straight pipe section is larger than the pipe diameter of the fourth straight pipe section; The second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section is sleeved on the outside of the first piping body and connected to the first piping body.

13. The pipe assembly according to claim 12, wherein: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected to the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the fifth straight pipe section is sleeved on the outside of the sixth straight pipe section and connected to the sixth straight pipe section.

14. The pipe assembly according to claim 5, wherein: The end of the first copper sleeve extends into the first pipe body, the first pipe body has a first end facing the second pipe body, and the second straight pipe section has a second end away from the second pipe body; In the axial direction of the pipe assembly, there is a distance between the first end and the second end, and within the range of the axial distance, the first pipe body and the second straight pipe section do not overlap in the radial direction of the pipe assembly.

15. The pipe assembly according to claim 14, wherein: The first copper sleeve comprises a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section which are connected in sequence, and the diameter of the fifth straight pipe section is smaller than the diameter of the fourth straight pipe section; The second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section extends into the first piping body and is connected to the first piping body.

16. The pipe assembly according to claim 15, wherein: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the fifth straight pipe section extends into the sixth straight pipe section and is connected to the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the fifth straight pipe section extends into the sixth straight pipe section and is connected to the sixth straight pipe section.

17. The pipe assembly according to claim 14, wherein: The first copper sleeve is a straight tube: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the first copper sleeve extends into the sixth straight pipe section and is connected to the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the first copper sleeve extends into the sixth straight pipe section and is connected to the sixth straight pipe section.

18. The pipe assembly according to claim 14, wherein: The first copper sleeve comprises a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section which are connected in sequence, and the pipe diameter of the fifth straight pipe section is larger than the pipe diameter of the fourth straight pipe section; The second straight pipe section is sleeved on the outside of the fourth straight pipe section and connected to the fourth straight pipe section, and the fifth straight pipe section extends into the first piping body and is connected to the first piping body.

19. The pipe assembly according to claim 18, wherein: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is smaller than the diameter of the sixth straight pipe section, and the fifth straight pipe section extends into the sixth straight pipe section and is connected to the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first piping body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section which are connected in sequence, the diameter of the seventh straight pipe section is larger than the diameter of the sixth straight pipe section, and the fifth straight pipe section extends into the sixth straight pipe section and is connected to the sixth straight pipe section.

20. The pipe assembly according to claim 4, wherein: The second pipe body comprises a main body section and an interface pipe section connected together; The other end of the second copper sleeve is sleeved on the outside of the interface pipe section and connected to the interface pipe section.

21. The pipe assembly according to claim 20, wherein: The second copper sleeve comprises an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section which are connected in sequence, and the pipe diameter of the eighth straight pipe section is greater than the pipe diameter of the ninth straight pipe section; The eighth straight pipe section is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe section is sleeved on the outside of the interface pipe section and connected to the interface pipe section.

22. The pipe assembly according to claim 21, wherein: The interface pipe section comprises a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, The interface pipe section is a straight pipe; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

23. The pipe assembly according to claim 20, wherein: The second copper sleeve is a straight tube; The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section, the second copper sleeve is arranged on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, The interface pipe section is a straight pipe; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence. The diameter of the first interface straight pipe section is smaller than the diameter of the second interface straight pipe section. The second copper sleeve is arranged on the outside of the first interface straight pipe section and connected to the first interface straight pipe section. The second interface straight pipe section is connected to the main body section.

24. The pipe assembly according to claim 20, wherein: The second copper sleeve comprises an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section which are connected in sequence, and the pipe diameter of the eighth straight pipe section is smaller than the pipe diameter of the ninth straight pipe section; The eighth straight pipe section is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe section is sleeved on the outside of the interface pipe section and connected to the interface pipe section.

25. The pipe assembly according to claim 24, wherein: The interface pipe section comprises a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is larger than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, The interface pipe section is a straight pipe; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved on the outside of the first interface straight pipe section and connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section.

26. The pipe assembly according to any one of claims 23 to 25, characterized in that: A first limiting ring protruding toward the middle of the second copper sleeve is provided on the inner wall of the second copper sleeve; The first limiting ring is used to limit the relative position between the first copper sleeve and the second copper sleeve.

27. The pipe assembly according to claim 3, wherein: The second pipe body comprises a main body section and an interface pipe section connected together; One end of the second copper sleeve is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the other end of the second copper sleeve extends into the interface pipe section and is connected to the interface pipe section.

28. The pipe assembly according to claim 27, wherein: The second copper sleeve comprises an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section which are connected in sequence, and the pipe diameter of the eighth straight pipe section is greater than the pipe diameter of the ninth straight pipe section; The eighth straight pipe section is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe section extends into the interface pipe section and is connected to the interface pipe section.

29. The pipe assembly according to claim 28, wherein: The interface pipe section comprises a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is larger than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, The interface pipe section is a straight pipe; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main body section.

30. The pipe assembly according to claim 28, wherein: The second copper sleeve is a straight tube; The interface pipe section comprises a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is larger than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, The interface pipe section is a straight pipe; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main body section.

31. The pipe assembly according to claim 27, wherein: The second copper sleeve comprises an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section which are connected in sequence, and the pipe diameter of the eighth straight pipe section is smaller than the pipe diameter of the ninth straight pipe section; The eighth straight pipe section is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve, and the ninth straight pipe section extends into the interface pipe section and is connected to the interface pipe section.

32. The pipe assembly according to claim 31, wherein: The interface pipe section comprises a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is larger than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main section; or, The interface pipe section is a straight pipe; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section and a second interface straight pipe section which are connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section extends into the first interface straight pipe section and is connected to the first interface straight pipe section, and the second interface straight pipe section is connected to the main body section.

33. The pipe assembly according to any one of claims 30 to 32, characterized in that: A first limiting ring protruding toward the middle of the second copper sleeve is provided on the inner wall of the second copper sleeve; The first limiting ring is used to limit the relative position between the first copper sleeve and the second copper sleeve.

34. The pipe assembly according to claim 2, wherein: The second pipe body comprises a main body section and an interface pipe section connected together, wherein the interface pipe section is arranged closer to the first pipe than the main body section, and the interface pipe section is connected to the first pipe; The second copper layer is plated on the inner surface of the second pipe body, or the second copper layer is plated on both the inner surface and the outer surface of the second pipe body.

35. The pipe assembly according to claim 34, wherein: The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section which are connected in sequence. The diameter of the first interface straight pipe section is larger than the diameter of the second interface straight pipe section. The first interface straight pipe section is connected to the first connecting portion, and the second interface straight pipe section is connected to the main section.

36. The pipe assembly according to claim 34, wherein: The interface pipe section is a straight pipe, and one end of the interface pipe section is connected to the first connecting portion, and the other end of the interface pipe section is connected to the main body section; or, The interface pipe section includes a first interface straight pipe section, a first interface transition pipe section, and a second interface straight pipe section which are connected in sequence. The pipe diameter of the first interface straight pipe section is smaller than the pipe diameter of the second interface straight pipe section. The first interface straight pipe section is connected to the first piping, and the second interface straight pipe section is connected to the main section.

37. The pipe assembly according to claim 36, wherein: A second limiting ring protruding toward the middle of the interface pipe section is provided on the inner wall of the interface pipe section; The second limiting ring is used to limit the relative position between the first pipe and the second pipe.

38. The pipe assembly according to any one of claims 1 to 25, 27 to 32, and 34 to 37, characterized in that: Also includes a third pipe; The third pipe is connected to an end of the first pipe that is away from the second pipe.

39. The pipe assembly according to claim 38, wherein: The pipe opening of the third pipe is arranged opposite to the pipe opening of the first pipe.

40. The pipe assembly according to claim 38, wherein: The third pipe extends into the first pipe and is connected to the first pipe; A plurality of positioning ribs are arranged on the outer wall of the third pipe and are spaced apart from each other along the circumference of the third pipe. The positioning ribs are stopped by the inner wall surface of the first pipe.

41. The pipe assembly according to any one of claims 1 to 25, 27 to 32, and 34 to 37, characterized in that: A filter assembly is arranged in the second pipe.

42. The pipe assembly according to any one of claims 3 to 25, 27 to 32, and 34 to 37, characterized in that: An annular material storage groove with a notch facing the first pipe is formed between the second copper sleeve and the second pipe body; The end of the first copper sleeve is confined in the annular material storage groove.

43. The pipe assembly according to any one of claims 4 to 25, 27 to 32, and 34 to 37, characterized in that: The first pipe body has a first end portion disposed facing the second pipe body, and the first copper sleeve has a third end portion disposed facing the second pipe body; The third end portion is disposed closer to the second pipe body than the first end portion.

44. The pipe assembly according to claim 43, wherein: The first copper sleeve has a fourth end portion arranged opposite to the third end portion; The second copper sleeve has a fifth end portion which is arranged away from the second pipe body, the fifth end portion is arranged closer to the second pipe body than the fourth end portion, and the distance between the fourth end portion and the fifth end portion in the axial direction of the pipe assembly is greater than or equal to 20 mm; and / or, The distance between the fourth end and the first end is greater than or equal to 30 mm.

45. The pipe assembly according to any one of claims 1 to 25, 27 to 32, and 34 to 37, wherein: The first pipe body and the second pipe body are both seamed steel pipes.

46. ​​The pipe assembly according to any one of claims 1 to 25, 27 to 32, and 34 to 37, characterized in that: The first pipe and the second pipe are coaxially arranged.

47. The pipe assembly according to any one of claims 1 to 25, 27 to 32, and 34 to 37, characterized in that: The first pipe body and the first connection part are welded together by a first solder, the first connection part and the second connection part are welded together by a second solder, and the second pipe body and the second connection part are welded together by a third solder; The melting point of the first solder and the melting point of the third solder are both greater than the melting point of the second solder.

48. A HVAC equipment having a refrigerant circulation circuit, characterized in that: The refrigerant circulation circuit includes a refrigerant container and a piping assembly as described in any one of claims 1 to 47; Wherein, the refrigerant container is any one of a compressor, an oil separator and a gas-liquid separator, and the refrigerant container is made of steel.

49. The HVAC equipment according to claim 48, characterized in that The refrigerant container is the compressor; The first pipe is configured as an exhaust gas transmission pipe, and the first pipe body has at least one first bending portion; The second pipe is designed as an outlet pipe for exhaust gas of the compressor.

50. The HVAC equipment according to claim 49, characterized in that: The other axial end of the first pipe body includes another first connection portion, the other first connection portion is connected to another refrigerant container, and the other refrigerant container is an oil separator; The oil separator inlet pipe is configured as the second pipe, and the other first connection portion is connected to the second connection portion of the oil separator inlet pipe.

51. The HVAC equipment according to claim 50, characterized in that: The oil separator further comprises a first separation chamber, the main component of which is made of steel; The second pipe body of the inlet pipe of the oil separator is vertically inserted into the first separation chamber, and the second pipe body has at least one second bending portion.

52. The HVAC equipment according to claim 51, characterized in that: The outlet pipe of the oil separator is configured as the second pipe; The second pipe body of the outlet pipe is inserted into the first separation chamber along the axial direction.

53. The HVAC equipment according to claim 49, characterized in that: The other end of the first pipe body in the axial direction includes another first connection portion, and the other first connection portion is connected to another refrigerant container, and the other refrigerant container is a gas-liquid separator; The gas-liquid separator inlet pipe is configured as the second pipe, and the other first connection portion is connected to the second connection portion of the gas-liquid separator inlet pipe.

54. The HVAC equipment according to claim 53, characterized in that: The gas-liquid separator further comprises a second separation chamber, the main component of which is made of steel; The second pipe body of the inlet pipe of the gas-liquid separator is inserted into the second separation chamber along the axial direction and is eccentrically arranged relative to the axial center line of the second separation chamber.

55. The HVAC equipment according to claim 54, characterized in that: The outlet pipe of the gas-liquid separator is configured as the second pipe; The second pipe body of the outlet pipe is inserted into the second separation chamber along the axial direction and is eccentrically arranged relative to the axial center line of the second separation chamber; The portion of the outlet pipe inserted into the second separation chamber is connected with the portion of the inlet pipe inserted into the second separation chamber.

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