Piping assembly and heating and ventilation equipment

Abstract

The utility model 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 air conditioning technical field, specifically relates to a pipe assembly and a heating and ventilation equipment using the pipe assembly. BACKGROUND

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

[0003] At present, in order to reduce the overall cost of the air conditioning system, the connecting pipe of the inlet and outlet of the pressure vessel is replaced by a stainless steel pipe, but because the melting points of the stainless steel pipe and the copper pipe are different, when the stainless steel pipe and the copper pipe are welded, a special welding process needs to be used to achieve this, which will increase the manufacturing difficulty of the entire air conditioning system. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a pipe assembly and a heating and ventilation equipment, which can reduce the manufacturing difficulty of the air conditioning system.

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

[0006] In this way, on the one hand, the pipe assembly provided by the present application uses less copper material, which can reduce the manufacturing cost of the pipe assembly; on the other hand, when welding technology is used to weld between the first pipe and the second pipe, 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 welding technology, compared with the scheme in the related art, the connection difficulty of the pipe assembly is reduced, and then the manufacturing difficulty of the entire heating and ventilation equipment is reduced.

[0007] As an optional implementation, the first connecting part is a first copper sleeve or a first copper layer plated on the first pipe body, and the second connecting 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 outside the first copper sleeve and connected with the first copper sleeve, and the other end of the second copper sleeve is sleeved outside the second pipe body and connected with the second pipe body.

[0010] As an optional implementation, the second copper sleeve comprises a first straight pipe segment and first and second flared segments connected at two ends of the first straight pipe segment; the first flared segment comprises a first transition pipe segment and a second straight pipe segment connected together, the first transition pipe segment is connected between one end of the first straight pipe segment and an end of the second straight pipe segment, and the second straight pipe segment is sleeved outside the first copper sleeve and connected with the first copper sleeve; the second flared segment comprises a second transition pipe segment and a third straight pipe segment connected together, the second transition pipe segment is connected between the other end of the first straight pipe segment and an end of the third straight pipe segment, and the third straight pipe segment is sleeved outside the second pipe body and connected with the second pipe body; wherein the pipe diameter of the second straight pipe segment and the pipe diameter of the third straight pipe segment are both greater than the pipe diameter of the first straight pipe segment.

[0011] As an optional implementation, the first copper sleeve is sleeved outside the first pipe body; the first copper sleeve is a straight pipe, and part of the structure of the first pipe body and part of the structure of the second straight pipe segment overlap in the radial direction of the pipe assembly.

[0012] In this way, the size of the structure at the connection between the first pipe and the second pipe in the radial direction of the pipe assembly is large, so that the connection reliability between the first pipe and the second pipe can be improved, and in turn the structural strength and structural stability of the pipe assembly provided in the embodiment can be improved.

[0013] As an optional implementation, the first pipe body is a straight pipe; or, the first pipe body comprises 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 pipe diameter of the second pipe segment is smaller than the pipe diameter of the first pipe segment; the first copper sleeve is sleeved outside the first pipe segment, and the first pipe segment and the second straight pipe segment overlap in the radial direction of the pipe assembly.

[0014] In this way, the size of the structure at the connection between the first pipe and the second pipe in the radial direction of the pipe assembly is large, so that the connection reliability between the first pipe and the second pipe can be improved, and in turn the structural strength and structural stability of the pipe assembly provided in the embodiment can be improved.

[0015] As an optional implementation, the first copper sleeve is sleeved outside the first pipe body, the first pipe body has a first end portion arranged to face the second pipe body, 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, the first end portion and the second end portion have a spacing, and in the axial spacing range, the first pipe body and the second straight pipe section do not overlap in the radial direction of the pipe assembly.

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

[0017] As an optional implementation, the first pipe body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the pipe diameter of the seventh straight pipe section is smaller than the pipe diameter of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section; or, the first pipe body is a straight pipe; or, the first pipe body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the pipe diameter of the seventh straight pipe section is greater than the pipe diameter of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section.

[0018] As an optional implementation, the first copper sleeve is a straight pipe: the first pipe body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the pipe diameter of the seventh straight pipe section is smaller than the pipe diameter of the sixth straight pipe section, and the first copper sleeve is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section; or, the first pipe body is a straight pipe; or, the first pipe body includes a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, the pipe diameter of the seventh straight pipe section is greater than the pipe diameter of the sixth straight pipe section, and the first copper sleeve is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section.

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

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

[0021] As an optional implementation, the end of the first copper sleeve extends into the first pipe body, the first pipe body has a first end portion arranged towards 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 spacing between the first end portion and the second end portion, and in the axial spacing range, the first pipe body and the second straight pipe section do not overlap in the radial direction of the pipe assembly.

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

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

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

[0025] As an optional implementation, the first copper sleeve comprises a fourth straight pipe segment, a third transition pipe segment and a fifth straight pipe segment connected in sequence, and a diameter of the fifth straight pipe segment is greater than a diameter of the fourth straight pipe segment; the second straight pipe segment is sleeved outside the fourth straight pipe segment and connected with the fourth straight pipe segment, and the fifth straight pipe segment extends into the first pipe body and is connected with the first pipe body.

[0026] As an optional implementation, the first pipe body comprises a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, a diameter of the seventh straight pipe segment is less than a diameter of the sixth straight pipe segment, and the fifth straight pipe segment extends into the sixth straight pipe segment and is connected with the sixth straight pipe segment; or, the first pipe body is a straight pipe; or, the first pipe body comprises a sixth straight pipe segment, a fourth transition pipe segment and a seventh straight pipe segment connected in sequence, a diameter of the seventh straight pipe segment is greater than a diameter of the sixth straight pipe segment, and the fifth straight pipe segment extends into the sixth straight pipe segment and is connected with the sixth straight pipe segment.

[0027] As an optional implementation, the second pipe body comprises a main body segment and an interface pipe segment connected together; the other end of the second copper sleeve is sleeved outside the interface pipe segment and connected with the interface pipe segment.

[0028] As an optional implementation, the second copper sleeve comprises an eighth straight pipe segment, a fifth transition pipe segment and a ninth straight pipe segment connected in sequence, and a diameter of the eighth straight pipe segment is greater than a diameter of the ninth straight pipe segment; the eighth straight pipe segment is sleeved outside the first copper sleeve and connected with the first copper sleeve, and the ninth straight pipe segment is sleeved outside the interface pipe segment and connected with the interface pipe segment.

[0029] As an optional implementation, the interface pipe segment comprises a first interface straight pipe segment, a first interface transition pipe segment and a second interface straight pipe segment connected in sequence, a diameter of the first interface straight pipe segment is greater than a diameter of the second interface straight pipe segment, the ninth straight pipe segment is sleeved outside the first interface straight pipe segment and connected with the first interface straight pipe segment, and the second interface straight pipe segment is connected with the main body segment; or, the interface pipe segment is a straight pipe; or, the interface pipe segment comprises a first interface straight pipe segment, a first interface transition pipe segment and a second interface straight pipe segment connected in sequence, a diameter of the first interface straight pipe segment is less than a diameter of the second interface straight pipe segment, the ninth straight pipe segment is sleeved outside the first interface straight pipe segment and connected with the first interface straight pipe segment, and the second interface straight pipe segment is connected with the main body segment.

[0030] 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, a pipe diameter of the first interface straight pipe section is greater than a pipe diameter of the second interface straight pipe section, the second copper sleeve is sleeved outside the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body 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, a pipe diameter of the first interface straight pipe section is less than a pipe diameter of the second interface straight pipe section, the second copper sleeve is sleeved outside the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section.

[0031] As an optional implementation, the second copper sleeve includes an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section connected in sequence, a pipe diameter of the eighth straight pipe section is less than a pipe diameter of the ninth straight pipe section; the eighth straight pipe section is sleeved outside the first copper sleeve and connected with the first copper sleeve, and the ninth straight pipe section is sleeved outside the interface pipe section and connected with the interface pipe section.

[0032] As an optional implementation, 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, a pipe diameter of the first interface straight pipe section is greater than a pipe diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved outside the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body 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, a pipe diameter of the first interface straight pipe section is less than a pipe diameter of the second interface straight pipe section, the ninth straight pipe section is sleeved outside the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section.

[0033] As an optional implementation, an inner wall of the second copper sleeve is provided with a first limiting ring protruding towards a middle part of the second copper sleeve; the first limiting ring is used for limiting a relative position between the first copper sleeve and the second copper sleeve.

[0034] Therefore, before the first copper sleeve and the second copper sleeve are welded, the first copper sleeve and the second copper sleeve can be first limited by the first limiting ring, that is, an end part of the first copper sleeve is abutted on the first limiting ring, so that the first copper sleeve and the second copper sleeve can be quickly welded together in a subsequent welding process, and the connection efficiency of the pipe assembly provided by the application is improved.

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

[0036] As an optional implementation, the second copper sleeve comprises an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section connected in sequence, 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 outside the first copper sleeve and connected with the first copper sleeve, and the ninth straight pipe section is inserted into the interface pipe section and connected with the interface pipe section.

[0037] As an optional implementation, the interface pipe section comprises 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 greater than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is inserted into the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section; or, the interface pipe section is a straight pipe; or, the interface pipe section comprises 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 less than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is inserted into the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section.

[0038] As an optional implementation, the second copper sleeve is a straight pipe; the interface pipe section comprises 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 greater than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is inserted into the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section; or, the interface pipe section is a straight pipe; or, the interface pipe section comprises 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 less than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is inserted into the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section.

[0039] As an optional implementation, the second copper sleeve comprises an eighth straight pipe section, a fifth transition pipe section and a ninth straight pipe section connected in sequence, the pipe diameter of the eighth straight pipe section is less than the pipe diameter of the ninth straight pipe section; the eighth straight pipe section is sleeved outside the first copper sleeve and connected with the first copper sleeve, and the ninth straight pipe section is inserted into the interface pipe section and connected with the interface pipe section.

[0040] As an optional implementation, the interface pipe section comprises 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 greater than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is inserted into the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section; or, the interface pipe section is a straight pipe; or, the interface pipe section comprises 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 less than the pipe diameter of the second interface straight pipe section, the ninth straight pipe section is inserted into the first interface straight pipe section and connected with the first interface straight pipe section, and the second interface straight pipe section is connected with the main body section.

[0041] As an optional implementation, the inner wall of the second copper sleeve is provided with a first limiting ring protruding towards the middle part 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 by the present application can be improved.

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

[0044] As an optional implementation, 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 greater than that of the second interface straight pipe section, the first interface straight pipe section is connected with the first connecting part, and the second interface straight pipe section is connected with the main body section.

[0045] As an optional implementation, the interface pipe section is a straight pipe, one end of the interface pipe section is connected with the first connecting part, and the other end of the interface pipe section is connected with 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 connected in sequence, the pipe diameter of the first interface straight pipe section is smaller than that of the second interface straight pipe section, the first interface straight pipe section is connected with the first pipe, and the second interface straight pipe section is connected with the main body section.

[0046] As an optional implementation, the inner wall of the interface pipe section is provided with a second limiting ring protruding towards the middle part 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] In this way, by arranging the second limiting ring on the inner wall of the interface pipe section, the first pipe and the second pipe can be positioned first and then welded when connected, so as to improve the connection efficiency between the first pipe and the second pipe.

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

[0049] In this way, by arranging the third pipe, the length of the pipe assembly provided by the present application can be adjusted to meet the requirements of different pipe lengths in the heating and ventilation equipment.

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

[0051] As an optional implementation, the third pipe extends into the first pipe and is connected with the first pipe; the outer wall of the third pipe is provided with a plurality of positioning ribs which are spaced along the circumference of the third pipe, and the positioning ribs are stopped on the inner wall surface of the first pipe.

[0052] Through the arrangement of the positioning ribs, the gap formed between the third pipe and the first pipe can be filled, so as to ensure the coaxial arrangement of the third pipe and the first pipe, thereby improving the uniformity of the solder filled between the third pipe and the first pipe, and further improving the connection reliability between the third pipe and the first pipe.

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

[0054] In this way, through the arrangement of the filter screen assembly, the solder can be prevented from falling into the refrigerant container to a certain extent during the welding of the first pipe and the second pipe, so that the refrigerant container can maintain good use performance.

[0055] As an optional implementation, the second copper sleeve and the second pipe body form an annular storage groove with a notch facing the first pipe; the end of the first copper sleeve is limited in the annular 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 solder is contained in the annular storage groove, so that the connection reliability between the first copper sleeve and the second copper sleeve can be improved, and further the connection reliability between the first pipe and the second pipe can be improved, thereby improving the structural stability of the pipe assembly provided by the present application.

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

[0058] As an optional implementation, 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 pipe body, and the fifth end portion is arranged closer to the second pipe 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 pipe 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] In this way, through the limitation of the above dimensions, the uniformity of the solder distribution can be improved, and further the connection reliability of the internal structure of the pipe assembly can be improved.

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

[0061] By using the seamless steel pipes, the first pipe body and the second pipe body can be applied to more sizes, and the corrosion resistance of the first pipe body and the second pipe body is stronger.

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

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

[0064] As an optional implementation, the first pipe body and the first connecting part are welded together by a first welding material, the first connecting part and the second connecting part are welded together by a second welding material, and the second pipe body and the second connecting part are welded together by a third welding material; the melting point of the first welding material and the melting point of the third welding material are both greater than the melting point of the second welding material.

[0065] In this way, when the second welding material is melted during the maintenance of the pipe assembly at a later stage, since the melting point of the first welding material and the melting point of the third welding material are both greater than the melting point of the second welding material, the first welding material and the third welding material will not be affected, that is, after the connection between the first connecting part and the second connecting part is disconnected, the connection between the first pipe body and the first connecting part and the connection between the second pipe body and the second connecting part will not be affected, thereby improving the convenience of the maintenance of the pipe assembly.

[0066] On the other hand, the application also provides a heating and ventilation device with a refrigerant circulation loop, characterized in that the refrigerant circulation loop comprises a refrigerant container and the above-mentioned pipe 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 implementation, 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 part; and the second pipe is configured as an outlet pipe of the compressor for exhaust.

[0068] As an optional implementation, the other end of the first pipe body in the axial direction comprises another first connecting part, the other first connecting part is connected with another refrigerant container, and the other refrigerant container is an oil separator; an inlet pipe of the oil separator is configured as a second pipe, and the other first connecting part is connected with a second connecting part of the inlet pipe of the oil separator.

[0069] As an optional implementation, the oil separator further comprises a first separation cavity, a main component of the first separation cavity is made of steel; the second pipe body of the inlet pipe of the oil separator is vertically inserted into the first separation cavity, and the second pipe body has at least one second bending part.

[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 axially inserted into the first separation cavity.

[0071] As an optional implementation, the other end of the first pipe body in the axial direction comprises another first connecting part, the other first connecting part is connected with another refrigerant container, and the other refrigerant container is a gas-liquid separator; the inlet pipe of the gas-liquid separator is configured as a second pipe, and the other first connecting part is connected with the second connecting part of the inlet pipe of the gas-liquid separator.

[0072] As an optional implementation, the gas-liquid separator further comprises a second separation cavity, a main component of the second separation cavity is made of steel; the second pipe body of the inlet pipe of the gas-liquid separator is axially inserted into the second separation cavity, and is arranged eccentrically relative to the axial center line of the second separation cavity.

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

[0074] In the pipe assembly and the heating and ventilation equipment provided in the embodiments of the present application, the first pipe body of the pipe assembly is made of stainless steel, the second pipe body is made of steel, and the connection between the first pipe and the second pipe is realized through 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 of the second connecting part with the first connecting part is made of copper or copper alloy.

[0075] In this way, on the one hand, the pipe assembly provided in the embodiments of the present application uses less copper material, which can reduce the manufacturing cost of the pipe assembly; on the other hand, when welding technology is used to weld between the first pipe and the second pipe, 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 realize in welding technology, compared with the scheme in the related art, which can reduce the connection difficulty of the pipe assembly, and further reduce the manufacturing difficulty of the entire heating and ventilation equipment. BRIEF DESCRIPTION OF DRAWINGS

[0076] Figure 1 The first structure diagram of the pipe assembly provided in the embodiments of the present application is shown in the following figure;

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

[0078] Figure 3 A second structure diagram of a second pipe in a pipe assembly according to an embodiment of the present application;

[0079] Figure 4 A second structure diagram of a pipe assembly according to an embodiment of the present application;

[0080] Figure 5 A third structure diagram of a pipe assembly according to an embodiment of the present application;

[0081] Figure 6 A fourth structure diagram of a pipe assembly according to an embodiment of the present application;

[0082] Figure 7 A fifth structure diagram of a pipe assembly according to an embodiment of the present application;

[0083] Figure 8 A sixth structure diagram of a pipe assembly according to an embodiment of the present application;

[0084] Figure 9 A seventh structure diagram of a pipe assembly according to an embodiment of the present application;

[0085] Figure 10 An eighth structure diagram of a pipe assembly according to an embodiment of the present application;

[0086] Figure 11 A ninth structure diagram of a pipe assembly according to an embodiment of the present application;

[0087] Figure 12 A tenth structure diagram of a pipe assembly according to an embodiment of the present application;

[0088] Figure 13 An eleventh structure diagram of a pipe assembly according to an embodiment of the present application;

[0089] Figure 14 A twelfth structure diagram of a pipe assembly according to an embodiment of the present application;

[0090] Figure 15 A thirteenth structure diagram of a pipe assembly according to an embodiment of the present application;

[0091] Figure 16 A fourteenth structure diagram of a pipe assembly according to an embodiment of the present application;

[0092] Figure 17Fig. 15 is a diagram showing a fifteenth structure of a pipe assembly according to an embodiment of the present application;

[0093] Figure 18 Fig. 16 is a diagram showing a sixteenth structure of a pipe assembly according to an embodiment of the present application;

[0094] Figure 19 Fig. 17 is a diagram showing a seventeenth structure of a pipe assembly according to an embodiment of the present application;

[0095] Figure 20 Fig. 18 is a diagram showing an eighteenth structure of a pipe assembly according to an embodiment of the present application;

[0096] Figure 21 Fig. 19 is a diagram showing a nineteenth structure of a pipe assembly according to an embodiment of the present application;

[0097] Figure 22 Fig. 20 is a diagram showing a twentieth structure of a pipe assembly according to an embodiment of the present application;

[0098] Figure 23 Fig. 21 is a diagram showing a twenty-first structure of a pipe assembly according to an embodiment of the present application;

[0099] Figure 24 Fig. 22 is a diagram showing a third structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0100] Figure 25 Fig. 23 is a diagram showing a fourth structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0101] Figure 26 Fig. 24 is a diagram showing a fifth structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0102] Figure 27 Fig. 25 is a diagram showing a sixth structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0103] Figure 28 Fig. 26 is a diagram showing a seventh structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0104] Figure 29 Fig. 27 is a diagram showing an eighth structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0105] Figure 30 Fig. 28 is a diagram showing a ninth structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0106] Figure 31 Fig. 29 is a diagram showing a tenth structure of a second pipe in a pipe assembly according to an embodiment of the present application;

[0107] Figure 32Eleventh configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0108] Figure 33 Twelfth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0109] Figure 34 Thirteenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0110] Figure 35 Fourteenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0111] Figure 36 Fifteenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0112] Figure 37 Sixteenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0113] Figure 38 Seventeenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0114] Figure 39 Eighteenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0115] Figure 40 Nineteenth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0116] Figure 41 Twentieth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0117] Figure 42 Twenty-first configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0118] Figure 43 Twenty-second configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0119] Figure 44 Twenty-third configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0120] Figure 45 Twenty-fourth configuration of the second pipe in the pipe assembly according to the embodiment of the present application;

[0121] Figure 46A twenty-second structural schematic view of a piping assembly according to an embodiment of the present application;

[0122] Figure 47 A twenty-third structural schematic view of a piping assembly according to an embodiment of the present application;

[0123] Figure 48 A plan structural schematic view of a third pipe in a piping assembly according to an embodiment of the present application;

[0124] Figure 49 A twenty-fourth structural schematic view of a piping assembly according to an embodiment of the present application;

[0125] Figure 50 A three-dimensional structural schematic view of a partial structure of a heating and ventilation device according to an embodiment of the present application;

[0126] Figure 51 A three-dimensional structural schematic view of a compressor in a heating and ventilation device according to an embodiment of the present application;

[0127] Figure 52 A three-dimensional structural schematic view of a compressor in a heating and ventilation device according to an embodiment of the present application, from another perspective;

[0128] Figure 53 A three-dimensional structural schematic view of an oil separator according to an embodiment of the present application;

[0129] Figure 54 A three-dimensional structural schematic view of a gas-liquid separator according to an embodiment of the present application;

[0130] Figure 55 A first structural schematic view of a connection between an exhaust pipe of a compressor and a transmission pipe in a heating and ventilation device according to an embodiment of the present application;

[0131] Figure 56 A second structural schematic view of a connection between an exhaust pipe of a compressor and a transmission pipe in a heating and ventilation device according to an embodiment of the present application;

[0132] Figure 57 A third structural schematic view of a connection between an exhaust pipe of a compressor and a transmission pipe in a heating and ventilation device according to an embodiment of the present application;

[0133] Figure 58 A structural schematic view of a connection between a first intake pipe or a second exhaust pipe of an oil separator and a transmission pipe in a heating and ventilation device according to an embodiment of the present application;

[0134] Figure 59 A structural schematic view of a connection between a second intake pipe or a third exhaust pipe of a gas-liquid separator and a transmission pipe in a heating and ventilation device according to an embodiment of the present application;

[0135] Figure 60A refrigerant flow direction diagram of the heating and ventilation device provided by the embodiment of the present application during refrigeration;

[0136] Figure 61 A refrigerant flow direction diagram of the heating and ventilation device provided by the embodiment of the present application during heating.

[0137] BRIEF DESCRIPTION OF DRAWINGS

[0138] 1, first pipe; 2, second pipe; 3, third pipe; 4, filter assembly; 5, annular storage tank;

[0139] 10, pipe assembly; 11, first pipe body; 12, first connecting part; 21, second pipe body; 22, second connecting part; 23, first limiting ring; 24, third limiting ring; 25, fourth limiting ring; 31, positioning rib; 32, third pipe 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 part; 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 part; 125, fourth end part; 211, main body 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 pipe section; 225, fifth transition pipe section; 226, ninth straight pipe section; 227, fifth end part; 201, first exhaust pipe; 202, suction pipe; 203, injection pipe; 301, first intake pipe; 302, second exhaust pipe; 304, oil discharge pipe; 401, second intake pipe; 402, second separation main body; 403, third exhaust pipe; 404, gas balance pipe; 405, liquid balance pipe; 100, indoor unit;

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

[0142] At present, in order to reduce the overall cost of the air conditioning system, the connecting pipe of the inlet and outlet of the pressure container is replaced by the stainless steel pipe instead of the copper pipe. However, due to the different melting points of the stainless steel pipe and the copper pipe, a special welding process is required when welding the stainless steel pipe and the copper pipe, which increases the manufacturing difficulty of the entire air conditioning system.

[0143] Therefore, the embodiment of the present application provides a pipe assembly and a heating and ventilation equipment. By limiting the material of the pipe assembly, the welding difficulty of the pipe assembly is reduced, and the manufacturing difficulty of the entire air conditioning system is reduced.

[0144] The embodiment of the present application will be described in detail below with reference to the drawings and specific embodiments.

[0145] Please refer to Figure 1 , Figure 1 The first structure schematic diagram of the pipe assembly provided by the embodiment of the present application is shown in the figure. As shown in the figure, the embodiment provides a pipe assembly 10, which includes a first pipe 1 and a second pipe 2. The first pipe 1 is configured as a transmission pipe on a refrigerant circulation loop, and the second pipe 2 is configured as an inlet connecting pipe or an outlet connecting pipe of a refrigerant container on the refrigerant circulation loop. The first pipe 1 includes a first pipe body 11 and a first connecting part 12 connected together, and the second pipe 2 includes a second pipe body 21 and a second connecting part 22 connected together. The first connecting part 12 and the second connecting part 22 are connected together. The first pipe body 11 is made of stainless steel material, at least part of the first connecting part 12 is made of copper or copper alloy, the second pipe body 21 is made of steel material, and the connecting part of the second connecting part 22 and the first connecting part 12 is made of copper or 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 mode of the inlet connecting pipe and the transmission pipe and the outlet connecting pipe and the transmission pipe for the three kinds of refrigerant containers will be described in detail in the following embodiments. In the embodiment, only some common features are described in detail.

[0147] In this way, by limiting the materials of the first pipe body 11, the second pipe body 21, the first connecting part 12 and the second connecting part 22, compared with the related art, on the one hand, the copper material used by the pipe assembly 10 provided by the embodiment is less, which can reduce the manufacturing cost of the pipe assembly 10; on the other hand, when welding the first pipe 1 and the second pipe 2 by using the welding technology, the material selection of the first connecting part 12 and the second connecting part 22 makes the welding between the first connecting part 12 and the second connecting part 22 more easily realized in the welding technology, so that the connection difficulty of the pipe assembly 10 is reduced.

[0148] As known from the above, at least part of the first connecting part 12 is made of copper or copper alloy, and the connecting part of the second connecting part 22 and the first connecting part 12 is made of copper or copper alloy, that is, for the welding between the first connecting part 12 and the second connecting part 22, it is the welding between copper material and copper material, or the welding between copper alloy and copper material, or the welding between copper alloy and copper alloy. In this way, when welding the structure containing both copper materials, the welding difficulty is small due to the similarity in the thermal expansion coefficient, melting point, chemical composition, thermal conductivity and the like, which not only improves the quality and stability of the welding, but also simplifies the control of the welding process parameters and the selection of the filling material.

[0149] For the specific selection of the first connecting part 12 and the second connecting part 22, the first connecting part 12 can be a first copper sleeve or a first copper layer plated on the first pipe body 11, and the second connecting part 22 can be a second copper sleeve or a second copper layer plated on the second pipe body 21. For the first connecting part 12 being a first copper sleeve and the second connecting part 22 being a second copper sleeve, reference can be made to Figure 1 .

[0150] Further, for the second connecting part 22 being a second copper layer, reference can be made to Figure 2 and Figure 3 , Figure 2 a first structure diagram of a second pipe in a pipe assembly provided by an embodiment of the present application, Figure 3 a second structure diagram of a second pipe in a pipe assembly provided by an embodiment of the present application. As shown in Figure 2 , the second copper layer can be plated only on the inner wall surface of the second pipe body 21, and at this time, the first connecting part 12 is welded together with the inner wall surface of the second pipe body 21, that is, the second pipe body 21 is sleeved on the outside of the first connecting part 12; as shown in Figure 3 , the second copper layer can be plated on the inner wall surface and the outer wall surface of the second pipe body 21, and at this time, the first connecting part 12 can be welded together with the inner wall surface of the second pipe body 21 or the outer wall surface of the second pipe body 21, that is, the second pipe body 21 can be sleeved on the outside of the first connecting part 12, or the first connecting part 12 can be sleeved on the outside of the second pipe body 21. In this regard, the type selection of the first connecting part 12 and the second connecting part 22 is not specifically limited.

[0151] In order to introduce the pipe assembly 10 provided by the embodiment in detail, the following will take the first connecting part 12 being a first copper sleeve and the second connecting part 22 being a second copper sleeve as an example for specific introduction.

[0152] As shown in Figure 1As shown, when the first connecting part 12 is the first copper sleeve and the second connecting part 22 is the 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 pipe body 21 can be that one end of the second copper sleeve is sleeved outside the first copper sleeve and connected with the first copper sleeve, and the other end of the second copper sleeve is sleeved outside the second pipe body 21 and connected with the second pipe body 21.

[0153] The shape of the second copper sleeve can also be different, which will be described in detail below in combination with the shape of the second copper sleeve.

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

[0155] Please refer to Figure 4 and Figure 5 , Figure 4 the second structure schematic diagram of the pipe assembly provided by the embodiment of the present application, Figure 5 the third structure schematic diagram of the pipe assembly provided by the embodiment of the present application. As shown in Figure 4 and Figure 5 , for the positional relationship between the first copper sleeve and the first pipe body 11, the first copper sleeve can be sleeved outside the first pipe body 11; the first copper sleeve is a straight pipe, and part of the structure of the first pipe body 11 overlaps part of the structure of the second straight pipe segment 2222 in the radial direction of the pipe assembly 10. In this way, the structure of the connection between the first pipe 1 and the second pipe 2 in the radial direction of the pipe assembly 10 is larger, so that the connection reliability between the first pipe 1 and the second pipe 2 can be improved, and in turn the structural strength and structural stability of the pipe assembly 10 provided by the embodiment can be improved.

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

[0157] AsFigure 5 In some other embodiments, the first pipe body 11 can include a first pipe segment 111, a first connecting pipe segment 112 and a second pipe segment 113 connected in sequence, the first pipe segment 111 and the second pipe segment 113 are both straight pipes, and the pipe diameter of the second pipe segment 113 is smaller than that of the first pipe segment 111; the first copper sleeve is sleeved outside the first pipe segment 111, and the first pipe segment 111 and the second straight pipe segment 2222 overlap in the radial direction of the pipe assembly 10. In this way, the structure of the connection between the first pipe 1 and the second pipe 2 in the radial direction of the pipe assembly 10 is larger, so that the connection reliability between the first pipe 1 and the second pipe 2 can be improved, and in turn the structural strength and stability of the pipe assembly 10 provided in the embodiment can be improved.

[0158] Please refer to Figures 6 to 14 , Figure 6 the fourth structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 7 the fifth structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 8 the sixth structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 9 the seventh structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 10 the eighth structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 11 the ninth structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 12 the tenth structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 13 the eleventh structural schematic diagram of the pipe assembly provided in the embodiment of the present application, Figure 14 the twelfth structural schematic diagram of the pipe assembly provided in the embodiment of the present application. As shown in the figure, in other embodiments, the first pipe body 11 and the second straight pipe segment 2222 can also not overlap in the radial direction of the pipe assembly 10, specifically, the first copper sleeve is sleeved outside the first pipe body 11, the first pipe body 11 has a first end portion 114 facing the second pipe body 21, and the second straight pipe segment 2222 has a second end portion 2223 away from the second pipe body 21; in the axial direction of the pipe assembly 10, there is a spacing between the first end portion 114 and the second end portion 2223, and in the axial spacing range, the first pipe body 11 and the second straight pipe segment 2222 do not overlap in the radial direction of the pipe assembly 10.

[0159] The shape of the first copper sleeve and the first pipe body 11 can be as follows.

[0160] Specifically, as 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, the fifth straight pipe segment 123 has a smaller pipe diameter than the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe main body 11 and connected with the first pipe main body 11.

[0161] Further, as Figure 6 shown in some embodiments, the first pipe main 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 seventh straight pipe segment 117 has a smaller pipe diameter than the sixth straight pipe segment 115, and the fifth straight pipe segment 123 is sleeved outside the sixth straight pipe segment 115 and connected with the sixth straight pipe segment 115.

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

[0163] As Figure 8 shown in some other embodiments, the first pipe main 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 seventh straight pipe segment 117 has a larger pipe diameter than the sixth straight pipe segment 115, and the fifth straight pipe segment 123 is sleeved outside the sixth straight pipe segment 115 and connected with the sixth straight pipe segment 115.

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

[0165] As Figure 9 shown in some embodiments, the first pipe main 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 seventh straight pipe segment 117 has a smaller pipe diameter than the sixth straight pipe segment 115, and the first copper sleeve is sleeved outside the sixth straight pipe segment 115 and connected with the sixth straight pipe segment 115.

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

[0167] As Figure 11 shown in some other embodiments, the first pipe main 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 seventh straight pipe segment 117 has a larger pipe diameter than the sixth straight pipe segment 115, and the first copper sleeve is sleeved outside the sixth straight pipe segment 115 and connected with the sixth straight pipe segment 115.

[0168] As Figures 12 to 14As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11.

[0169] As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 12 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11.

[0170] Figure 13 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11.

[0171] As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 14 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11.

[0172] Figures 15 to 23 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 15 Figure 16 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 17 Figure 18 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 19 Figure 20 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 21 Figure 22 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11. Figure 23 As 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, the pipe diameter of the fifth straight pipe segment 123 being greater than that of the fourth straight pipe segment 121; the second straight pipe segment 2222 is sleeved outside the fourth straight pipe segment 121 and connected with the fourth straight pipe segment 121, and the fifth straight pipe segment 123 is sleeved outside the first pipe body 11 and connected with the first pipe body 11.

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

[0174] The shape of the first copper sleeve and the first pipe body 11 can be as follows.

[0175] As Figures 15 to 17 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 connected in sequence, the pipe diameter of the fifth straight pipe section 123 is smaller than that of the fourth straight pipe section 121; the second straight pipe section 2222 is sleeved outside the fourth straight pipe section 121 and connected with the fourth straight pipe section 121, and the fifth straight pipe section 123 extends into the first pipe body 11 and is connected with the first pipe body 11.

[0176] Further, as Figure 15 shown, in some embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is smaller than that 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 with the sixth straight pipe section 115.

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

[0178] As Figure 17 shown, in some other embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is greater than that 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 with the sixth straight pipe section 115.

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

[0180] Further, as Figure 18 shown, in some embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is smaller than that of the sixth straight pipe section 115, and the first copper sleeve extends into the sixth straight pipe section 115 and is connected with the sixth straight pipe section 115.

[0181] As shown in FIG. 1, in some embodiments, the first pipe body 11 includes a first straight pipe section 111, a first transition pipe section 112 and a second straight pipe section 113 connected in sequence, the pipe diameter of the second straight pipe section 113 is greater than that of the first straight pipe section 111, and the first copper sleeve is connected with the first straight pipe section 111. Figure 19 As shown in FIG. 2, in other embodiments, the first pipe body 11 is a straight pipe.

[0182] As shown in FIG. 3, in yet other embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is greater than that of the sixth straight pipe section 115, and the first copper sleeve is connected with the sixth straight pipe section 115. Figure 20 As shown in FIG. 4, in yet 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 connected in sequence, the pipe diameter of the fifth straight pipe section 123 is greater than that of the fourth straight pipe section 121; the second straight pipe section 222 is sleeved outside the fourth straight pipe section 121 and connected with the fourth straight pipe section 121, and the fifth straight pipe section 123 is connected with the first pipe body 11.

[0183] Figures 21 to 23 As shown in FIG. 5, in yet 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 connected in sequence, the pipe diameter of the fifth straight pipe section 123 is greater than that of the fourth straight pipe section 121; the second straight pipe section 222 is sleeved outside the fourth straight pipe section 121 and connected with the fourth straight pipe section 121, and the fifth straight pipe section 123 is connected with the first pipe body 11.

[0184] Further, as shown in FIG. 6, in some embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is less than that of the sixth straight pipe section 115, and the fifth straight pipe section 123 is connected with the sixth straight pipe section 115. Figure 21 As shown in FIG. 7, in other embodiments, the first pipe body 11 is a straight pipe.

[0185] Figure 22 As shown in FIG. 8, in yet other embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is greater than that of the sixth straight pipe section 115, and the fifth straight pipe section 123 is connected with the sixth straight pipe section 115.

[0186] As shown in FIG. 9, in yet other embodiments, the first pipe 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 pipe diameter of the seventh straight pipe section 117 is greater than that of the sixth straight pipe section 115, and the fifth straight pipe section 123 is connected with the sixth straight pipe section 115. Figure 23 Please refer to FIG. 10,

[0187] , Figures 24 to 32 FIG. 11 is a third structure schematic view of the second pipe in the pipe assembly provided by the embodiments of the present application, Figure 24 FIG. 12 is a fourth structure schematic view of the second pipe in the pipe assembly provided by the embodiments of the present application, Figure 25 FIG. 13 is a fifth structure schematic view of the second pipe in the pipe assembly provided by the embodiments of the present application, Figure 26 FIG. 14 is a sixth structure schematic view of the second pipe in the pipe assembly provided by the embodiments of the present application, Figure 27 FIG. 15 is a seventh structure schematic view of the second pipe in the pipe assembly provided by the embodiments of the present application, Figure 28 ​​A seventh structure diagram of the second pipe in the pipe assembly provided by the embodiment of the present application is shown in the figure, Figure 29 An eighth structure diagram of the second pipe in the pipe assembly provided by the embodiment of the present application is shown in the figure, Figure 30 A ninth structure diagram of the second pipe in the pipe assembly provided by the embodiment of the present application is shown in the figure, Figure 31 A tenth structure diagram of the second pipe in the pipe assembly provided by the embodiment of the present application is shown in the figure, Figure 32 An eleventh structure diagram of the second pipe in the pipe assembly provided by the embodiment of the present application is shown in the figure.

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

[0189] As shown in the figure, Figures 24 to 26 The second copper sleeve comprises an eighth straight pipe section 224, a fifth transition pipe section 225 and a ninth straight pipe section 226 connected in sequence, the pipe diameter of the eighth straight pipe section 224 is larger than that of the ninth straight pipe section 226; the eighth straight pipe section 224 is sleeved outside the first copper sleeve and connected with the first copper sleeve, and the ninth straight pipe section 226 is sleeved outside the interface pipe section 212 and connected with the interface pipe section 212.

[0190] Further, as shown in the figure, Figure 24 In some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 is sleeved outside the first interface straight pipe section 2121 and connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0191] As shown in the figure, Figure 25 In other embodiments, the interface pipe section 212 is a straight pipe.

[0192] As shown in the figure, Figure 26 In still other embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 is sleeved outside the first interface straight pipe section 2121 and connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0193] As shown in the figure, Figures 27 to 29 In other embodiments, the second copper sleeve is a straight pipe.

[0194] Further, as shown in Figure 27 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 greater than the pipe diameter of the second interface straight pipe section 2123, the second copper sleeve is sleeved on the outer side of the first interface straight pipe section 2121 and connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

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

[0196] As shown in Figure 29 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 less than the pipe diameter of the second interface straight pipe section 2123, the second copper sleeve is sleeved on the outer side of the first interface straight pipe section 2121 and connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0197] As shown in Figures 30 to 32 some other embodiments, the second copper sleeve includes an eighth straight pipe section 224, a fifth transition pipe section 225, and a ninth straight pipe section 226 connected in sequence, the pipe diameter of the eighth straight pipe section 224 is less than the pipe diameter of the ninth straight pipe section 226; the eighth straight pipe section 224 is sleeved on the outer side of the first copper sleeve and connected with the first copper sleeve, and the ninth straight pipe section 226 is sleeved on the outer side of the interface pipe section 212 and connected with the interface pipe section 212.

[0198] Further, as shown in Figure 30 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 greater than the pipe diameter of the second interface straight pipe section 2123, the ninth straight pipe section 226 is sleeved on the outer side of the first interface straight pipe section 2121 and connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

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

[0200] As shown in Figure 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 diameter of the first interface straight pipe segment 2121 is smaller than the diameter of the second interface straight pipe segment 2123. A 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. The second interface straight pipe segment 2123 is connected to the main body segment 211.

[0201] like Figures 27 to 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, to improve the welding efficiency between the first copper sleeve and the second copper sleeve, a first limiting ring 23 protruding towards the center 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 limiting ring 23 can be used to limit the position between the first copper sleeve and the second copper sleeve, that is, to make the end of the first copper sleeve abut 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 piping assembly 10 provided in this embodiment.

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

[0203] like Figures 33 to 41As shown, in some other embodiments, the second copper sleeve can be inserted 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 Figures 33 to 35 As shown, in some embodiments, the second copper sleeve includes an eighth straight pipe section 224, a fifth transition pipe section 225, and a ninth straight pipe section 226 connected in sequence. The diameter of the eighth straight pipe section 224 is larger than the diameter of the ninth straight pipe section 226. The eighth straight pipe section 224 is sleeved on the outside of the first copper sleeve and connected to the first copper sleeve. The ninth straight pipe section 226 extends into the interface pipe section 212 and is connected to the interface pipe section 212.

[0205] Furthermore, such as Figure 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 connected in sequence. The diameter of the first interface straight pipe segment 2121 is larger than the diameter of the second interface straight pipe segment 2123. A ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and connects to it. The second interface straight pipe segment 2123 is connected to the main body segment 211.

[0206] like Figure 34 As shown, in some other embodiments, the interface pipe segment 212 is a straight pipe.

[0207] like Figure 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 connected in sequence. The diameter of the first interface straight pipe segment 2121 is smaller than the diameter of the second interface straight pipe segment 2123. A ninth straight pipe segment 226 extends into the first interface straight pipe segment 2121 and connects to it. The second interface straight pipe segment 2123 is connected to the main body segment 211.

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

[0209] Furthermore, such as Figure 36As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0210] As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 37 As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0211] Figure 38 As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0212] As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figures 39 to 41 As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0213] Figure 39 As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0214] As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 40 As shown in some embodiments, the interface pipe section 212 comprises 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 that of the second interface straight pipe section 2123, the ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0215] Figure 41 ​​​As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0216] As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figures 36 to 38 As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0217] As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 2 Figure 3 Figures 42 to 45 Figure 42 As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 43 Figure 44 Figure 45 As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 2 Figure 3 Figures 42 to 45 As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0218] As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0219] As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 42 Figure 43 As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0220] As shown in some optional embodiments, the interface pipe section 212 comprises 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 ninth straight pipe section 226 extends into the first interface straight pipe section 2121 and is connected with the first interface straight pipe section 2121, and the second interface straight pipe section 2123 is connected with the main body section 211. Figure 42 ​​​​​​​​In the second aspect, the second copper layer is plated on the inner surface of the second pipe body 21. Figure 43 In the third aspect, the second copper layer is plated on both the inner surface and the outer surface of the second pipe body 21.

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

[0222] As shown in Figure 44 and Figure 45 , 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 that of the second interface straight pipe section 2123, the first interface straight pipe section 2121 is connected with the first pipe 1, and the second interface straight pipe section 2123 is connected with the main body section 211.

[0223] In the fourth aspect, the second copper layer is plated on the inner surface and the end surface of the second pipe body 21. Figure 44 In the fifth aspect, the second copper layer is plated on both the inner surface and the outer surface of the second pipe body 21. Figure 45 In the fifth aspect, the 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 of plating the second copper layer on the second pipe body 21, if it is necessary to limit the relative position between the first pipe 1 and the second pipe 2, then a second limiting ring 213 protruding towards the middle of the interface pipe section 212 needs to be arranged 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, please refer to Figure 2 , Figure 3 , Figure 44 and Figure 45 . In this way, by arranging 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 can be understood that when the length of the transmission pipe on the refrigerant circulation loop connected with the second pipe 2 is greater than the preset length of the pipeline, a length of the extension pipe needs to be arranged at the end of the first pipe 1 away from the second pipe 2, therefore, please refer to Figure 46 and Figure 47 , Figure 46 is the twenty-second structural schematic diagram of the pipe assembly provided by the embodiments of the present application, Figure 47This is a schematic diagram of the twenty-third structural embodiment of the piping assembly provided in this application. As shown in the figure, the piping assembly 10 provided in this embodiment further includes a third pipe 3; the third pipe 3 is connected to the end of the first pipe 1 away from the second pipe 2, specifically, the third pipe 3 is connected to the end of the first pipe body 11. Thus, by providing the third pipe 3, the length of the piping assembly 10 provided in this embodiment is adjustable to meet the needs of different lengths of piping in HVAC equipment.

[0226] There are two possible ways to connect the third pipe 3 to the first pipe 1.

[0227] Specifically, such as Figure 46 As shown, in some embodiments, the port of the third pipe 3 is arranged opposite to the port 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 Figure 47 As shown, in some other embodiments, the third pipe 3 extends into the first pipe 1 and connects to the first pipe 1. That is, after the third pipe 3 is manufactured externally, it can be welded together with the first pipe 1 by fusion welding.

[0229] It should be noted that, at this time, the structure of the first pipe 1 and the second pipe 2 can adopt any of the above embodiments.

[0230] exist Figure 46 In the first piping body 11, there are 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. A first copper sleeve is fitted 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 comprises 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 comprises 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 an end of the second straight pipe section 2222, the second straight pipe section 2222 is sleeved outside the first copper sleeve and connected with the first copper sleeve; the second flared section 223 comprises 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 an end of the third straight pipe section 2232, the third straight pipe section 2232 is sleeved outside the second pipe body 21 and connected with the second pipe 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 greater than the pipe diameter of the first straight pipe section 221, and the sixth straight pipe section 115 and the second straight pipe section 2222 overlap in the radial direction of the pipe assembly 10.

[0232] The second pipe body 21 comprises 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, and the third straight pipe section 2232 is sleeved outside the interface pipe section 212 and connected with the interface pipe section 212.

[0233] In Figure 47 , the structure of the first pipe body 11 is different from that shown in Figure 46 , in the specific embodiment, the first pipe body 11 comprises 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 connected in sequence, wherein the pipe diameter of the eighth straight pipe 118 is smaller than the pipe diameter of the ninth straight pipe 1110, the pipe diameter of the ninth straight pipe 1110 is smaller than the pipe diameter of the tenth straight pipe 1130, and the first copper sleeve is sleeved outside the eighth straight pipe 118 and connected with the eighth straight pipe 118, the eighth straight pipe 118 and the second straight pipe section 2222 overlap in the radial direction of the pipe assembly 10, and the third pipe 3 extends into the tenth straight pipe 1130 and is connected with the tenth straight pipe 1130.

[0234] It should be noted that Figure 46 and Figure 47 , the third pipe 3 is a straight pipe, but in other embodiments, the third pipe 3 can also be connected by pipe sections of different diameters, and here the shape of the third pipe 3 is not specifically limited.

[0235] Of course, if the gap formed between the third pipe 3 and the first pipe 1 is not uniform, it will cause the third pipe 3 and the first pipe 1 to be unable to be coaxial, so that the solder filled between the third pipe 3 and the first pipe 1 will be uneven, which will affect the reliability of the connection of the third pipe 3 and the first pipe 1, therefore, please refer toFigure 48 , Figure 48 The third pipe of the pipe assembly provided by the embodiment of the present application is shown in the schematic view of the planar structure. As shown in the figure, in the embodiment, the outer wall of the third pipe 3 is provided with a plurality of positioning ribs 31 distributed along the circumference of the third pipe 3, and the positioning ribs 31 are stopped on the inner wall surface of the first pipe 1. Specifically, the third pipe 3 comprises a third pipe body 32, and the outer wall of the third pipe body 32 is provided with a plurality of positioning ribs 31 distributed along the circumference of the third pipe body 32. The positioning ribs 31 can be integrally formed with the third pipe body 32 by stamping or the like, or the positioning ribs 31 can be directly welded on the outer wall of the third pipe body 32 after being manufactured, and the outer contour shape of the positioning ribs 31 can be arc-shaped. Here, the arrangement manner of the positioning ribs 31 and the shape of the positioning ribs 31 are not specifically limited.

[0236] Therefore, by arranging the positioning ribs 31 as described above, the gap formed between the third pipe 3 and the first pipe 1 can be filled to ensure the coaxial arrangement of the third pipe 3 and the first pipe 1, so as to improve the uniformity of the solder filled between the third pipe 3 and the first pipe 1, and further improve the connection reliability between the third pipe 3 and the first pipe 1.

[0237] Of course, the plurality of positioning ribs 31 described above should have the same shape and size, and here the shape and size of the positioning ribs 31 are not specifically limited.

[0238] During the welding of the first pipe 1 and the second pipe 2, the phenomenon of solder falling may occur, and if the solder falls into the inside of the refrigerant container, it will affect the use performance of the refrigerant container. Therefore, please refer to the description of the first embodiment of the present application for the specific structure of the pipe assembly. Figure 49 , Figure 49 The twenty-fourth structural schematic view of the pipe assembly provided by the embodiment of the present application is shown in the figure.

[0239] As shown in the figure, in some optional embodiments, in order to avoid this phenomenon to some extent, a filter screen assembly 4 is arranged in the second pipe 2. The specific structure of the first pipe 1 and the second pipe 2 is the same as that of the first embodiment of the present application. Figure 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 overlaps with the second straight pipe section 2222 in the radial direction of the pipe assembly 10.

[0240] The specific structure of the filter screen assembly 4 can be that a metal filter screen is directly welded in the inside of the interface pipe section 212, or a metal support provided with a filter screen is welded in the inside of the interface pipe section 212. Here, the structure of the filter screen assembly 4 is not specifically limited as long as it can prevent the solder from falling into the inside of the refrigerant container.

[0241] Therefore, by the filter screen assembly 4, the solder can be prevented from falling into the refrigerant container to some extent during the welding of the first pipe 1 and the second pipe 2, so that the refrigerant container can maintain good use performance.

[0242] In order to further improve the connection reliability between the first pipe 1 and the second pipe 2, as shown in the figure, in some embodiments, a ring-shaped solder storage groove 5 is formed between the second copper sleeve and the second pipe body 21, and the end of the first copper sleeve is limited in the ring-shaped solder storage groove 5. Figure 49 Therefore, the first copper sleeve and the second copper sleeve can be connected by more solder, and the solder is contained in the ring-shaped solder storage groove 5, so that the connection reliability between the first copper sleeve and the second copper sleeve can be improved, and the connection reliability between the first pipe 1 and the second pipe 2 can be improved, thereby improving the structural stability of the pipe assembly 10 provided in the embodiment.

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

[0244] Further, the first copper sleeve has a fourth end 125 opposite to the third end 124, and the second copper sleeve has a fifth end 227 away from the second pipe body 21, and the fifth end 227 is closer to the second pipe body 21 than the fourth end 125, and the distance L1 between the fourth end 125 and the fifth end 227 in the axial direction of the pipe 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] Therefore, by limiting the above distance, the solder can be uniformly distributed during the welding of the first pipe 1 and the second pipe 2, 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 suitable for more sizes, and the corrosion resistance of the first pipe body 11 and the second pipe body 21 is stronger.

[0247] In order to make the solder distribution uniform when the first pipe 1 and the second pipe 2 are welded, 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 the first pipe 1 and the second pipe 2 are welded can be improved, so as to further improve the reliability after the first pipe 1 and the second pipe 2 are connected.

[0248] It can be understood that if the melting point of the solder used when the first connecting part 12 and the second connecting part 22 are welded is low, it is convenient to maintain the pipe assembly 10 later, that is, it is convenient to separate the first pipe 1 and the second pipe 2, and therefore, in some embodiments, the first pipe body 11 and the first connecting part 12 are welded together by the first solder, the first connecting part 12 and the second connecting part 22 are welded together by the second solder, and the second pipe body 21 and the second connecting part 22 are welded together by the 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. In this way, when the second solder is melted during the maintenance of the pipe assembly 10 later, since 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, the first solder and the third solder will not be affected, that is, after the connection between the first connecting part 12 and the second connecting part 22 is disconnected, the connection between the first pipe body 11 and the first connecting part 12 and the connection between the second pipe body 21 and the second connecting part 22 will not be affected, improving the convenience of maintaining the pipe assembly 10.

[0249] Please refer to Figure 50 , Figures 51 to 54 A partial structure of a heating and ventilation equipment provided by the embodiment of the present application is shown in the perspective structural schematic view. The embodiment also provides a heating and ventilation equipment having a refrigerant circulation loop, the refrigerant circulation loop comprising a refrigerant container and the pipe assembly 10 in the above embodiment; wherein the refrigerant container is any one of a compressor 20, an oil separator 30 and a gas-liquid separator 40, and the refrigerant container is made of steel.

[0250] Please refer to Figure 51 , Figure 52 A perspective structural schematic view of a compressor in a heating and ventilation equipment provided by the embodiment of the present application is shown, Figure 53 A perspective structural schematic view of a compressor in a heating and ventilation equipment provided by the embodiment of the present application is shown from another angle, Figure 54 A perspective structural schematic view of an oil separator provided by the embodiment of the present application is shown, Figure 51 A perspective structural schematic view of a gas-liquid separator provided by the embodiment of the present application is shown.

[0251] As Figure 52 and Figures 55 to 57As shown, when the refrigerant container is the compressor 20; the first pipe 1 is configured as an exhaust gas transmission pipe, the first pipe body 11 has at least one first bending part; and the second pipe 2 is configured as an outlet pipe of the compressor 20 for exhaust gas, i.e. the first exhaust pipe 201 of the compressor 20.

[0252] Further, the other end of the first pipe body 11 in the axial direction includes another first connecting part 12, the other first connecting part 12 is connected with another refrigerant container, the other refrigerant container is an oil separator 30; the inlet pipe of the oil separator 30 is configured as the second pipe 2, i.e. the first inlet pipe 301 of the oil separator 30 is configured as the second pipe 2, the other first connecting part 12 is connected with the second connecting part 22 of the inlet pipe of the oil separator 30.

[0253] And the oil separator 30 further includes a first separation body 302, a first separation cavity is formed in the first separation body 302, the main component of the first separation cavity is made of steel material, i.e. the main component of the first separation body 302 is made of steel material; the second pipe body 21 of the inlet pipe of the oil separator 30 is vertically inserted into the first separation cavity, and the second pipe body 21 has at least one second bending part 3011, i.e. the second pipe body 21 of the first inlet pipe 301 is vertically inserted into the first separation cavity, and the first inlet pipe 301 has at least one second bending part 3011.

[0254] Of course, the oil separator 30 also includes a second exhaust pipe 303, the outlet pipe of the oil separator 30 is configured as the second pipe 2, i.e. the second exhaust pipe 303 is configured as the second pipe 2; the second pipe body 21 of the outlet pipe is inserted into the first separation cavity along the axial direction, and the second pipe body 21 of the second exhaust pipe 303 is inserted into the first separation cavity along the axial direction.

[0255] Among them, the first inlet pipe 301 is arranged at the side of the first separation body 302, and the second exhaust pipe 303 is arranged at the top of the first separation body 302.

[0256] It can be understood that the gas-liquid separator 40 is also connected with the compressor 20, i.e. the other end of the first pipe body 11 in the axial direction includes another first connecting part 12, the other first connecting part 12 is connected with another refrigerant container, the other refrigerant container is the gas-liquid separator 40; the inlet pipe of the gas-liquid separator 40 is configured as the second pipe 2, the other first connecting part 12 is connected with the second connecting part 22 of the inlet pipe of the gas-liquid separator 40, i.e. the second inlet pipe 401 of the gas-liquid separator 40 is configured as the second pipe 2, and the other first connecting part 12 is connected with the second connecting part 22 of the second inlet pipe 401.

[0257] The gas-liquid separator 40 further includes a second separation body 402, inside which a second separation chamber is formed. 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 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. That is, the second piping body 21 of the second inlet pipe 401 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.

[0258] Furthermore, the gas-liquid separator 40 also includes a third exhaust pipe 403. The outlet pipe of the gas-liquid separator 40 is configured as a second pipe 2, that is, the third exhaust pipe 403 is configured as a second pipe 2. The second pipe body 21 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. That is, the second pipe body 21 of the third exhaust pipe 403 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 to the portion of the inlet pipe inserted into the second separation chamber. That is, the portion of the third exhaust pipe 403 inserted into the second separation chamber is connected to the portion of the second intake pipe 401 inserted into the second separation chamber.

[0259] The second intake pipe 401 and the third exhaust pipe 403 are both located on the top of the second separation body 402.

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

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

[0262] like Figure 55 As shown, Figure 56 This is a schematic diagram of a first structural connection between the exhaust pipe and the transmission pipe of a compressor in an HVAC system provided in this application embodiment. Figure 57 This is a schematic diagram of a second structural connection between the exhaust pipe and the transmission pipe of the compressor in the HVAC equipment provided in this application embodiment. Figure 55 This is a schematic diagram of a third structure for connecting the exhaust pipe and transmission pipe of a compressor in a heating, ventilation, and air conditioning system provided in this application embodiment.

[0263] like Figure 56As shown, in one specific embodiment, the first exhaust pipe 201 is configured as the second pipe 2. The interface pipe section 212 of the first exhaust pipe 201 is a straight pipe section, and the second connecting part 22 is a second copper sleeve. The second copper sleeve is fitted on the outside of the interface pipe section 212, and the outer wall surface of the second copper sleeve is provided with an outwardly protruding third limiting ring 24. The third limiting ring 24 is used to limit the distance between the second copper sleeve and the interface pipe section 212. The first connecting part 12 is the first copper sleeve, and the second copper sleeve is fitted on the outside of the first copper sleeve. The inner wall of the second copper sleeve is provided with a fourth limiting ring 25, which 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 sleeved on the outside 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 copper sleeve overlap radially.

[0264] like Figure 55 As shown, in another specific embodiment, with Figure 57 The difference is that the third piping 3 is connected to the end of the seventh straight pipe section 117 by fusion welding.

[0265] like Figure 55 As shown, in yet another specific implementation, with Figure 58 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 connected in sequence. The diameter of the eighth straight pipe 118 is smaller than that of the ninth straight pipe 1110, and the diameter of the ninth straight pipe 1110 is smaller than that of the tenth straight pipe 1130. A first copper sleeve is fitted 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 radially in the piping assembly 10. The end of the tenth straight pipe 1130 is lapped with the third piping 3 by fusion welding.

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

[0267] Please combine Figure 58 , Figure 59 This is a schematic diagram showing the connection between the first air inlet pipe or the second exhaust pipe of the oil separator in the HVAC equipment provided in this application embodiment and the transmission pipe.

[0268] In a specific embodiment, the first gas inlet pipe 301 and the second gas outlet pipe 303 are configured as the second pipe 2, the interface pipe section 212 of the second pipe 2 comprises 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 greater than the pipe diameter of the second interface straight pipe section 2123, the first interface straight pipe section 2121 is connected with the second copper sleeve, the second interface straight pipe section 2123 is connected with the main body section 211, the first interface straight pipe section 2121 is connected with the second copper sleeve outside the second copper sleeve, the second copper sleeve is outside the first copper sleeve, and the first copper sleeve and the first interface straight pipe section 2121 overlap in the radial direction, the first pipe main body 11 comprises a sixth straight pipe section 115, a fourth transition pipe section 116 and a seventh straight pipe section 117 connected in sequence, the pipe diameter of the sixth straight pipe section 115 is smaller than the pipe diameter of the seventh straight pipe section 117, the first copper sleeve is connected with the sixth straight pipe section 115 outside the sixth straight pipe section 115, and the sixth straight pipe section 115 and the second copper sleeve overlap in the radial direction.

[0269] Please refer to Figure 59 , Figure 50 The structure diagram of the connection between the second gas inlet pipe or the third gas outlet pipe of the gas-liquid separator in the heating and ventilation equipment and the transmission pipe provided by the embodiment of the present application.

[0270] In a specific embodiment, the second gas inlet pipe 401 and the third gas outlet pipe 403 are configured as the second pipe 2, the interface pipe section 212 of the second pipe 2 comprises 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 greater than the pipe diameter of the second interface straight pipe section 2123, the pipe diameter of the first interface straight pipe section 2121 is greater than the pipe diameter of the second interface straight pipe section 2123, the inner wall of the first interface straight pipe section 2121 is plated with copper, and is connected with the first copper sleeve, the first copper sleeve comprises a fourth straight pipe section 121, a third transition pipe section 122 and a fifth straight pipe section 123 connected in sequence, the pipe diameter of the fifth straight pipe section 123 is greater than the pipe diameter of the fourth straight pipe section 121; the main body section 211 and the first pipe main body 11 are both straight pipe sections, the first interface straight pipe section 2121 is outside the fourth straight pipe section 121, the fifth straight pipe section 123 is outside the first pipe main body 11, and the first pipe main body 11 and the first interface straight pipe section 2121 do not overlap in the radial direction.

[0271] As Figure 60As shown, the outdoor unit of the heating and ventilation device provided in the embodiment further comprises a four-way valve 50 connected with the oil separator 30, an outdoor unit heat exchanger 60 connected with the four-way valve 50, a filter 70 connected with the outdoor unit heat exchanger 60, an electronic expansion valve 80 connected with the filter 70, a refrigerant heat dissipation device 90 connected with the electronic expansion valve 80, and the like. Of course, the heating and ventilation device provided in the embodiment further comprises an indoor unit 100 connected with the outdoor unit.

[0272] It should be noted that the heating and ventilation device provided in the embodiment can be a multi-connected air conditioning system, that is, the indoor unit 100 can be multiple, and the number of the indoor unit 100 is not specifically limited herein.

[0273] Please refer to Figure 61 and Figure 60 , Figure 61 the refrigerant flow direction diagram of the heating and ventilation device provided in the embodiment when cooling, Figure 60 the refrigerant flow direction diagram of the heating and ventilation device provided in the embodiment when heating. Wherein, Figure 61 and Figure 60 The heating and ventilation device shown has two compressors 20 and three indoor units 100. The following description of the refrigerant flow direction will be introduced by taking one compressor 20 and one indoor unit 100 as an example, and the refrigerant flow direction in the other compressor 20 and the other indoor units 100 can be referred to this introduction.

[0274] Specifically, as shown in Figure 61 , when the heating and ventilation device is in the cooling mode, the refrigerant flow direction is 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 cooling mode, when the refrigerant flows to the downstream of the refrigerant heat dissipation device 90, part of the refrigerant will be branched out. At this time, if it is needed to supplement the air to the compressor 20, the flow direction of the part of the refrigerant should be refrigerant heat dissipation device 90→compressor 20; if it is not needed to supplement the air to the compressor 20, the flow direction of the part of the refrigerant should be refrigerant heat dissipation device 90→gas-liquid separator 40→compressor 20.

[0276] As shown in ​ , when the heating and ventilation device is in the heating mode, the refrigerant flow direction is 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 is branched off, at this time, if the compressor 20 needs to be supplemented with air, the flow direction of this part of the refrigerant should be indoor unit 100→ compressor 20; if the compressor 20 does not need to be supplemented with air, the flow direction of this part of the refrigerant should be indoor unit 100→ gas-liquid separator 40→ compressor 20.

[0278] The heating and ventilation equipment provided in the embodiment can reduce the manufacturing difficulty of the heating and ventilation equipment by adopting the above-mentioned pipe assembly 10.

Claims

1. A piping assembly characterized by, 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 connecting portion connected together, and the second pipe includes a second pipe body and a second connecting portion connected together, and the first connecting portion is connected with the second connecting portion together. The first connecting portion is a first copper sleeve or a first copper layer plated on the first pipe body, and the second connecting portion is a second copper sleeve or a second copper layer plated on the second pipe body.

2. The pipe assembly of claim 1, wherein, The first connecting portion is a first copper sleeve, and the second connecting portion is a second copper sleeve.

3. The pipe assembly of claim 2, wherein, One end of the second copper sleeve is sleeved outside the first copper sleeve and connected with the first copper sleeve, and the other end of the second copper sleeve is sleeved outside the second pipe body and connected with the second pipe body.

4. The pipe assembly according to claim 3, wherein The second copper sleeve includes a first straight pipe segment and first and second flared pipe segments connected at both ends of the first straight pipe segment.

5. The pipe assembly of claim 4, wherein, The first flared pipe segment includes a first transition pipe segment and a second straight pipe segment connected together, the first transition pipe segment is connected between one end of the first straight pipe segment and an end portion of the second straight pipe segment, and the second straight pipe segment is sleeved outside the first copper sleeve and connected with the first copper sleeve. The second flared pipe segment includes a second transition pipe segment and a third straight pipe segment connected together, the second transition pipe segment is connected between the other end of the first straight pipe segment and an end portion of the third straight pipe segment, and the third straight pipe segment is sleeved outside the second pipe body and connected with the second pipe body. The pipe diameter of the second straight pipe segment and the pipe diameter of the third straight pipe segment are both greater than the pipe diameter of the first straight pipe segment. The first copper sleeve is sleeved outside the first pipe body.

6. The pipe assembly of claim 5, wherein, The first copper sleeve is a straight pipe, and part of the structure of the first pipe body and part of the structure of the second straight pipe segment overlap in the radial direction of the pipe assembly. The first pipe body is a straight pipe; or 7. The pipe assembly of claim 6, wherein, The first pipe 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 pipe diameter of the second pipe segment is smaller than the pipe diameter of the first pipe segment. The first copper sleeve is sleeved outside the first pipe segment, and the first pipe segment and the second straight pipe segment overlap in the radial direction of the pipe assembly. The first copper sleeve is sleeved outside the first pipe body, the first pipe body has a first end portion arranged to face the second pipe body, and the second straight pipe segment has a second end portion arranged to be away from the second pipe body.

8. The pipe assembly of claim 5, wherein, In the axial direction of the pipe assembly, there is a spacing between the first end portion and the second end portion, and in the axial spacing range, the first pipe body and the second straight pipe segment do not overlap in the radial direction of the pipe assembly. ​ 9. The pipe assembly of claim 8, wherein, The first copper sleeve comprises a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section connected in sequence, and a diameter of the fifth straight pipe section is smaller than that of the fourth straight pipe section; The second straight pipe section is sleeved outside the fourth straight pipe section and connected with the fourth straight pipe section, and the fifth straight pipe section is sleeved outside the first pipe body and connected with the first pipe body.

10. The pipe assembly of claim 9, wherein, The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, a diameter of the seventh straight pipe section is smaller than that of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, a diameter of the seventh straight pipe section is greater than that of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section.

11. The pipe assembly of claim 8, wherein, The first copper sleeve is a straight pipe: The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, a diameter of the seventh straight pipe section is smaller than that of the sixth straight pipe section, and the first copper sleeve is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, a diameter of the seventh straight pipe section is greater than that of the sixth straight pipe section, and the first copper sleeve is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section.

12. The pipe assembly of claim 8, wherein, The first copper sleeve comprises a fourth straight pipe section, a third transition pipe section and a fifth straight pipe section connected in sequence, and a diameter of the fifth straight pipe section is greater than that of the fourth straight pipe section; The second straight pipe section is sleeved outside the fourth straight pipe section and connected with the fourth straight pipe section, and the fifth straight pipe section is sleeved outside the first pipe body and connected with the first pipe body.

13. The pipe assembly of claim 12, wherein, The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, a diameter of the seventh straight pipe section is smaller than that of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section; or, The first pipe body is a straight pipe; or, The first pipe body comprises a sixth straight pipe section, a fourth transition pipe section and a seventh straight pipe section connected in sequence, a diameter of the seventh straight pipe section is greater than that of the sixth straight pipe section, and the fifth straight pipe section is sleeved outside the sixth straight pipe section and connected with the sixth straight pipe section.

14. The pipe assembly of claim 5, wherein, An end of the first copper sleeve extends into the first pipe body, the first pipe body has a first end portion arranged towards the second pipe body, and the second straight pipe section has a second end portion arranged away from the second pipe body; In an axial direction of the pipe assembly, there is a spacing between the first end portion and the second end portion, and in the axial spacing range, the first pipe body and the second straight pipe section do not overlap in a radial direction of the pipe assembly.

15. The pipe assembly of claim 14, wherein, The first copper sleeve includes a fourth straight pipe section, a third transition pipe section, and a fifth straight pipe section connected in sequence, wherein 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 of claim 15, wherein, 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 fifth straight pipe section extends into and connects 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 that of the sixth straight pipe section, and the fifth straight pipe section extends into the sixth straight pipe section and connects to the sixth straight pipe section.

17. The tubing set of claim 14, wherein, The first copper sleeve is a straight tube: 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 and connects 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 that of the sixth straight pipe section, and the first copper sleeve extends into the sixth straight pipe section and connects to the sixth straight pipe section.

18. The tubing set of claim 14, wherein, The first copper sleeve includes a fourth straight pipe section, a third transition pipe section, and a fifth straight pipe section connected in sequence, wherein 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.

19. The pipe assembly of claim 18, wherein, 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 fifth straight pipe section extends into and connects 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 that of the sixth straight pipe section, and the fifth straight pipe section extends into the sixth straight pipe section and connects to the sixth straight pipe section.

20. The pipe assembly of claim 4, wherein, 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 fitted onto the outside of the interface pipe section and connected to the interface pipe section.

21. The pipe assembly of claim 20, wherein, The second copper sleeve includes an eighth straight pipe section, a fifth transition pipe section, and a ninth straight pipe section connected in sequence, wherein the diameter of the eighth straight pipe section is larger than the 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 piping assembly as claimed in claim 21, characterized in that, 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. A 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. The second interface straight pipe section is connected to the main body 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. The second interface straight pipe section is connected to the main body section.

23. The tubing set of claim 20, wherein, 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. A second copper sleeve is fitted onto the outside of the first interface straight pipe section and connected to it. The second interface straight pipe section is connected to the main body 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 second copper sleeve is fitted 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 tubing set of claim 20, wherein, The second copper sleeve includes an eighth straight pipe section, a fifth transition pipe section, and a ninth straight pipe section connected in sequence, wherein the diameter of the eighth straight pipe section is smaller than the 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 piping assembly as claimed in claim 24, characterized in that, 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. The second interface straight pipe section is connected to the main body 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. The second interface straight pipe section is connected to the main body section.

26. The pipe assembly of any one of claims 23 to 25, wherein, The inner wall of the second copper sleeve is provided with a first limiting ring that protrudes toward the center 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 of claim 3, wherein, The second piping body includes a main body section and an interface pipe section connected together; One end of the second copper sleeve is fitted onto the outside of the first copper sleeve and connected to the first copper sleeve, while the other end of the second copper sleeve extends into the interface pipe section and is connected to the interface pipe section.

28. The tubing set of claim 27, wherein, The second copper sleeve includes an eighth straight pipe section, a fifth transition pipe section, and a ninth straight pipe section connected in sequence, wherein the diameter of the eighth straight pipe section is larger than the 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 piping assembly as claimed in claim 28, characterized in that, 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 connects to it. The second interface straight pipe section is connected to the main body 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 connects to the first interface straight pipe section. The second interface straight pipe section is connected to the main body section.

30. The tubing set of claim 28, wherein, 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 connects to it. The second interface straight pipe section is connected to the main body 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 connects to the first interface straight pipe section. The second interface straight pipe section is connected to the main body section.

31. The tubing set of claim 27, wherein, The second copper sleeve includes an eighth straight pipe section, a fifth transition pipe section, and a ninth straight pipe section connected in sequence, wherein the diameter of the eighth straight pipe section is smaller than the 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 piping assembly as claimed in claim 31, characterized in that, 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 connects to it. The second interface straight pipe section is connected to the main body 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 connects to the first interface straight pipe section. The second interface straight pipe section is connected to the main body section.

33. The pipe assembly of any one of claims 30 to 32, wherein, The inner wall of the second copper sleeve is provided with a first limiting ring that protrudes toward the center 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 tubing set of claim 2, wherein, The second piping body includes a main body section and an interface pipe section connected together. The interface pipe section is located 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 the second copper layer, or both the inner and outer surfaces of the second piping body are plated with the second copper layer.

35. The tubing set of 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 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 part, and the second interface straight pipe section is connected to the main body section.

36. The tubing set of claim 34, wherein, The interface pipe segment is a straight pipe, with one end connected to the first connecting part and the other end connected to the main body segment; 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 first interface straight pipe section is connected to the first piping, and the second interface straight pipe section is connected to the main body section.

37. The tubing set of 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 tubing assembly of any of claims 1-25, 27-32, 34-37, wherein, It also includes third-party piping; The third conduit is connected to the end of the first conduit furthest from the second conduit.

39. The tubing set of claim 38, wherein, The inlet of the third pipe is positioned opposite to the inlet of the first pipe.

40. The tubing set of claim 38, wherein, The third conduit extends into the first conduit and connects to the first conduit; The outer wall of the third pipe is provided with a plurality of positioning ribs that are spaced apart along the circumference of the third pipe, and the positioning ribs stop against the inner wall surface of the first pipe.

41. The tubing assembly of any of claims 1-25, 27-32, 34-37, wherein, A filter assembly is installed inside the second piping.

42. The tubing assembly of any of claims 3-25, 27-32, 34-37, wherein, An annular storage trough with its opening facing the first pipe is formed between the second copper sleeve and the second piping body. The end of the first copper sleeve is confined within the annular storage trough.

43. The tubing assembly of any of claims 4-25, 27-32, 34-37, wherein, The first piping body has a first end facing the second piping body, and the first copper sleeve has a third end facing the second piping body; The third end is located closer to the second piping body than the first end.

44. The tubing set of claim 43, wherein, The first copper sleeve has a fourth end disposed opposite to the third end; The second copper sleeve has a fifth end disposed away from the second pipe body, the fifth end being closer to the second pipe body than the fourth end, and the axial distance between the fourth end and the fifth end in 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 tubing set of any of claims 1-25, 27-32, 34-37, wherein, Both the first piping body and the second piping body are welded steel pipes.

46. The tubing set of any one of claims 1 to 25, 27 to 32, 34 to 37, wherein, The first piping and the second piping are coaxially arranged.

47. The tubing assembly of any one of claims 1-25, 27-32, 34-37, wherein, The first piping body and the first connecting part are welded together by a first solder, the first connecting part and the second connecting part are welded together by a second solder, and the second piping body and the second connecting 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 heating and air conditioning apparatus having a refrigerant circulation circuit, characterized by comprising: The refrigerant circulation loop includes a refrigerant container and a piping assembly as described in any one of claims 1 to 47; 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 heating and ventilation apparatus of claim 48, wherein, The refrigerant container is the compressor; The first piping is configured as an exhaust transmission pipe, and the main body of the first piping has at least one first bend. The second piping is configured as an outlet pipe for exhaust from the compressor.

50. The heating and ventilation apparatus of claim 49, wherein, The other end of the first piping body axially includes another first connection part, which 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 piping, and another first connection is connected to the second connection of the oil separator inlet pipe.

51. The heating and ventilation apparatus of claim 50, wherein, 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 connector of the oil separator is vertically inserted into the first separation chamber, and the second piping body has at least one second bend.

52. The heating and ventilation apparatus of claim 51, wherein, The outlet inlet of the oil separator is configured as the second piping; The second piping body of the outlet connector is inserted axially into the first separation chamber.

53. The heating and ventilation apparatus of claim 49, wherein, The other end of the first piping body axially includes another first connection part, which 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 piping, and another of the first connection parts is connected to the second connection part of the gas-liquid separator inlet pipe.

54. The heating and ventilation apparatus of claim 53, wherein, 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 connector of the gas-liquid separator is inserted into the second separation chamber along the axial direction and is eccentrically positioned relative to the axial centerline of the second separation chamber.

55. The heating and ventilation apparatus of claim 54, wherein, The outlet pipe of the gas-liquid separator is configured as the second piping; The second piping body of the outlet connector is inserted into the second separation chamber along the axial direction and is eccentrically positioned relative to the axial centerline of the second separation chamber. The portion of the outlet pipe inserted into the second separation chamber is connected to the portion of the inlet pipe inserted into the second separation chamber.

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