Air conditioner outdoor unit and air conditioner system

Abstract

The utility model discloses an air conditioner outdoor unit and an air conditioner system. The air conditioner outdoor unit comprises an outdoor heat exchanger and a system pipeline connected with the outdoor heat exchanger. The outdoor heat exchanger comprises a first metal pipeline made of first metal, and the system pipeline comprises a second metal pipeline made of second metal. The first metal pipeline comprises a heat exchange pipe, a first refrigerant inlet and outlet pipe section and a second refrigerant inlet and outlet pipe section; the first refrigerant inlet and outlet pipe section is connected with a first transition pipe section made of second metal. The first transition pipe section comprises a transverse pipe section connected with the first refrigerant inlet and outlet pipe section and a vertical pipe section bent upwards relative to the transverse pipe section. The second metal pipeline comprises a first connecting pipe section, the first connecting pipe section is an inverted-U-shaped pipe section, and one end of the inverted-U-shaped pipe section is inserted into the upper end of the vertical pipe section and welded to the vertical pipe section. According to the scheme, the outdoor heat exchanger can be more conveniently connected with the system pipeline, and the space layout in the air conditioner outdoor unit can be more reasonable.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and more specifically, to an outdoor unit of an air conditioner and an air conditioning system. Background Technology

[0002] With the development of air conditioning technology and the comparison of metal raw material resources, aluminum tube heat exchangers have developed rapidly and are gradually replacing copper tube heat exchangers.

[0003] However, in air conditioning systems, the aluminum tubing of aluminum tube heat exchangers still needs to be connected to other metal tubing (such as copper tubing) within the system. Due to the different melting points of copper and aluminum tubing, welding copper and aluminum tubing is more difficult than welding two tubing of the same material. How to efficiently weld the aluminum tubing of the heat exchanger to the copper tubing in the air conditioning system is a technical problem that needs to be solved. Utility Model Content

[0004] This utility model provides an outdoor air conditioning unit and an air conditioning system to solve the problem of welding difficulties between the heat exchanger pipes and other metal pipes in the air conditioning system.

[0005] An embodiment of this application provides an outdoor unit for an air conditioner, including: an outdoor heat exchanger and a system pipeline connected to the outdoor heat exchanger for transmitting refrigerant; the outdoor heat exchanger includes a first metal pipeline made of a first metal, and the system pipeline includes a second metal pipeline made of a second metal;

[0006] The first metal pipeline includes a heat exchange tube and a first refrigerant inlet / outlet pipe section and a second refrigerant inlet / outlet pipe section connected to the heat exchange tube; the first refrigerant inlet / outlet pipe section is connected to a first transition pipe section made of the second metal, the first transition pipe section includes a horizontal pipe section connected to the first refrigerant inlet / outlet pipe section and a vertical pipe section that bends upward relative to the horizontal pipe section.

[0007] The second metal conduit includes a first connecting pipe section, which is an inverted U-shaped pipe section. One end of the inverted U-shaped pipe section is inserted into the upper end of the vertical pipe section and welded to the vertical pipe section.

[0008] In one embodiment, the first metal is aluminum, and the second metal is copper or stainless steel.

[0009] In one embodiment, the first transition pipe section is configured to be welded into the first refrigerant inlet / outlet pipe section.

[0010] In one embodiment, the outdoor unit of the air conditioner further includes a high-pressure valve assembly, which includes a first tee pipe, a second tee pipe, a third connecting pipe, a fourth connecting pipe, a shut-off valve, a check valve, a filter, and an expansion valve.

[0011] The first tee pipe has a first port, a second port and a third port, and the second tee pipe has a fourth port, a fifth port and a sixth port; the first port is connected to the first connecting pipe segment, a third connecting pipe segment is connected between the second port and the fifth port, a fourth connecting pipe segment is connected between the third port and the sixth port, and the fourth port is connected to the shut-off valve;

[0012] The third connecting pipe section is equipped with the one-way valve, which is configured so that the refrigerant flows only in the direction of the shut-off valve. The fourth connecting pipe section is equipped with the filter and the expansion valve.

[0013] In one embodiment, the first port is positioned upwards, and the end of the first connecting pipe segment furthest from the first transition pipe segment is inserted downwards into the first port and welded in place.

[0014] In one embodiment, the second refrigerant inlet / outlet pipe section is connected to a second transition pipe section made of the second metal;

[0015] The second metal pipe also includes a second connecting pipe section, which is configured to connect to the end of the second transition pipe section that is away from the second refrigerant inlet / outlet pipe section.

[0016] In one embodiment, the second refrigerant inlet / outlet pipe section is configured to extend from top to bottom, the second transition pipe section is a U-shaped pipe section with the opening facing upward, and one end of the second transition pipe section is connected to the downward-facing end of the second refrigerant inlet / outlet pipe section.

[0017] In one embodiment, one end of the second connecting pipe section is configured to be inserted downward into the second transition pipe section and welded, and the other end is configured to be connected upward to a downward port of the four-way valve.

[0018] In one embodiment, multiple heat exchange tubes are provided, and the outdoor heat exchanger is further provided with multiple first branch pipe sections and multiple second branch pipe sections. One of the first branch pipe sections and the second branch pipe sections is configured to supply refrigerant to at least a portion of the heat exchange tubes, and the other is configured to receive at least a portion of the refrigerant flowing out of the heat exchange tubes.

[0019] Among them, multiple first branch pipe sections are connected to a manifold pipe section, the manifold pipe section is connected to one end of a heat exchange pipe located at the bottom, and the first refrigerant inlet / outlet pipe section is connected to the other end of the heat exchange pipe at the bottom; multiple second branch pipe sections are connected to the second refrigerant inlet / outlet pipe section.

[0020] Embodiments of this application also provide an air conditioning system, including an indoor air conditioning unit and an outdoor air conditioning unit as described above.

[0021] In the solution provided in this application, the first refrigerant inlet / outlet pipe section of the outdoor heat exchanger can be pre-connected to the first transition pipe section. During the assembly of the outdoor air conditioning unit, the outdoor heat exchanger is connected to the first connecting pipe section through the first transition pipe section. Since the first transition pipe section and the first connecting pipe section are made of the same material, such as copper pipes, the welding operation of the first connecting pipe section to the first transition pipe section is easier to implement on-site, which helps to improve assembly efficiency. Moreover, the first transition pipe section includes a horizontal pipe section and a vertical pipe section. The horizontal pipe section is connected to the first refrigerant inlet / outlet pipe section, and one end of the inverted U-shaped first connecting pipe section is inserted downward into the upper end of the vertical pipe section and welded to the vertical pipe section. In this way, the annular gap between the outer periphery of the vertical pipe section and the first connecting pipe section can accommodate the solder to facilitate welding. Furthermore, the first connecting pipe section is bent upward and then downward to connect with other pipes, which can avoid the space below. Therefore, the solution provided in this application can make it easier for the outdoor heat exchanger's pipes to connect with other metal pipes in the air conditioning system, and can also make the space layout inside the outdoor air conditioning unit more reasonable.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0024] Figure 1 This is a schematic diagram of the structure of an outdoor unit of an air conditioner according to one embodiment of this application;

[0025] Figure 2 for Figure 1 An enlarged schematic diagram of the outdoor unit of the air conditioner at point M;

[0026] Figure 3 This is a partial structural diagram of an air conditioner outdoor unit according to one embodiment of this application;

[0027] Figure 4 This is a partial structural diagram of an air conditioner outdoor unit according to one embodiment of this application;

[0028] Figure 5 for Figure 4 A schematic diagram of the flow path of some of the pipelines;

[0029] Figure 6This is a partial structural diagram of an air conditioner outdoor unit according to one embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Outdoor heat exchanger; 11-First refrigerant inlet / outlet pipe section; 111-First straight pipe section; 12-Second refrigerant inlet / outlet pipe section; 13-First branch pipe section; 14-Combination pipe section; 15-Second branch pipe section; 16-Heat exchange tube; 17-First transition pipe section; 171-Horizontal pipe section; 1711-Second straight pipe section; 172-Vertical pipe section; 18-Second transition pipe section; 2-Compressor; 3-Four-way valve; 4-Stop valve; 51-First connecting pipe section; 52-Second connecting pipe section; 53-Third connecting pipe section; 54-Fourth connecting pipe section; 55-First tee pipe; A-First port; B-Second port; C-Third port; 56-Second tee pipe; D-Fourth port; E-Fifth port; F-Sixth port; 6-Expansion valve; 7-Filter; 8-One-way valve; 10-Shell; 101-Ventilation port. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0033] Embodiments of this application provide an outdoor unit for an air conditioner, such as... Figures 1-6 As shown, it includes: an outdoor heat exchanger 1 and a system piping connected to the outdoor heat exchanger 1 for transmitting refrigerant; the outdoor heat exchanger 1 includes a first metal piping made of a first metal, and the system piping includes a second metal piping made of a second metal.

[0034] The first metal pipeline includes a heat exchange tube 16 and a first refrigerant inlet / outlet pipe section 11 and a second refrigerant inlet / outlet pipe section 12 connected to the heat exchange tube 16; the first refrigerant inlet / outlet pipe section 11 is connected to a first transition pipe section 17 made of a second metal, the first transition pipe section 17 includes a horizontal pipe section 171 connected to the first refrigerant inlet / outlet pipe section 11 and a vertical pipe section 172 bent upward relative to the horizontal pipe section 171; wherein, the first refrigerant inlet / outlet pipe section 11 can be located at the lower part of the outdoor heat exchanger 1, and the second refrigerant inlet / outlet pipe section 12 can be located at the upper part of the outdoor heat exchanger 1.

[0035] The second metal conduit includes a first connecting pipe section 51, which is an inverted U-shaped pipe section. One end of the inverted U-shaped pipe section is inserted into the upper end of the vertical pipe section 172 and welded to the vertical pipe section 172. It should be noted that the "inverted U-shaped pipe section" described in this application refers to a pipe section with both ends facing downwards, and the "U-shaped pipe section" refers to a pipe section with both ends facing upwards. The shape of the conduit between the two ends is not limited.

[0036] In one embodiment, the first metal can be aluminum, and the second metal can be copper or stainless steel. That is, the first metal pipe used in the outdoor heat exchanger 1 is an aluminum pipe, as aluminum pipes have good thermal conductivity and are low in cost. The second metal pipe in the system typically uses a metal with good thermal conductivity and stable metal activity, such as copper or stainless steel pipes. Of course, the first and second metals can also be other suitable metal materials. Here, metal activity refers to the fact that the stronger the metal activity, the easier it is to lose electrons to form cations, i.e., the easier it is to produce a reaction. For example, aluminum is highly reactive, while copper is less reactive than aluminum (i.e., copper has stable metal activity), and aluminum easily loses electrons to replace copper ions. Furthermore, in this application, "aluminum-made" refers to being made of aluminum or aluminum alloy materials; similarly, "copper-made" refers to being made of copper or copper alloy materials.

[0037] In the solution provided in this application, the first refrigerant inlet / outlet pipe section 11 of the outdoor heat exchanger 1 can be pre-connected to the first filter pipe section 17. When assembling the outdoor unit of the air conditioner, the outdoor heat exchanger 1 is connected to the first connecting pipe section 51 through the first filter pipe section 17. Since the first filter pipe section 17 and the first connecting pipe section 51 are made of the same material, such as copper pipes, the welding operation of the first connecting pipe section 51 to the first filter pipe section 17 is easier to implement on the assembly site, which helps to improve assembly efficiency.

[0038] Furthermore, the first transition pipe section 17 includes a horizontal pipe section 171 and a vertical pipe section 172. The horizontal pipe section is connected to the first refrigerant inlet / outlet pipe section 11, and one end of the inverted U-shaped first connecting pipe section 51 is inserted downward into the upper end of the vertical pipe section 172 and welded to the vertical pipe section 172. In this way, the annular gap between the outer periphery of the vertical pipe section 172 and the first connecting pipe section 51 can accommodate solder to facilitate welding. Moreover, the first connecting pipe section 51, after bending upwards and then downwards to connect with other pipes, can avoid the space below. Therefore, the solution provided in this application makes it easier for the outdoor heat exchanger 1, which uses a first metal pipe (e.g., aluminum pipe), to connect with other metal pipes (e.g., copper pipe) in the air conditioning system, and also allows for a more rational spatial layout within the outdoor unit of the air conditioner.

[0039] In one embodiment, the first metal is aluminum and the second metal is copper or stainless steel. Since the melting point of the aluminum pipe is lower than that of the first transition pipe section 17 (e.g., copper or stainless steel pipe), the end of the transverse pipe section 171 of the first transition pipe section 17 is inserted into the first refrigerant inlet / outlet pipe section 11 and welded to it. That is, the first refrigerant inlet / outlet pipe section 11, which is an aluminum pipe, is located outside the transverse pipe section 171 to achieve welding with the transverse pipe section 171.

[0040] In one embodiment, such as Figures 1-3 As shown, multiple heat exchange tubes 16 are provided, and the outdoor heat exchanger 1 is provided with multiple first branch pipe sections 13 and multiple second branch pipe sections 15. One of the first branch pipe sections 13 and the second branch pipe sections 15 is configured to supply refrigerant to at least a portion of the heat exchange tubes 16, and the other is configured to receive at least a portion of the refrigerant flowing out of the heat exchange tubes 16.

[0041] Multiple first branch pipe sections 13 are connected to a manifold section 14, which is connected to one end of a heat exchange pipe 16 located at the bottom. The first refrigerant inlet / outlet pipe section 11 is connected to the other end of the heat exchange pipe 16 at the bottom, so that the first refrigerant inlet / outlet pipe section 11 can extend from below the outdoor heat exchanger 1. Multiple second branch pipe sections 15 are connected to the second refrigerant inlet / outlet pipe section 12.

[0042] The outdoor heat exchanger 1 is equipped with multiple heat exchange tubes 16, each of which can be U-shaped, S-shaped, or other shapes. Each first branch pipe section 13 can branch the refrigerant at the refrigerant outlet (or refrigerant inlet) corresponding to one or more heat exchange tubes 16, and each second branch pipe section 15 can branch the refrigerant at the refrigerant inlet (or refrigerant outlet) corresponding to one or more heat exchange tubes 16. For example, refer to... Figures 1-3 When the first refrigerant inlet / outlet pipe section 11 serves as the refrigerant output end and the second refrigerant inlet / outlet pipe section 12 serves as the refrigerant input end, the refrigerant provided by the second refrigerant metal pipe section 12 is supplied to multiple heat exchange tubes 16 through multiple second branch pipe sections 15. The refrigerant output from the multiple heat exchange tubes 16 above is transported to the heat exchange tube at the bottom through multiple first branch pipe sections 13 and manifold pipe sections 14 and then output from the first refrigerant inlet / outlet pipe section 11.

[0043] exist Figures 1-3In this embodiment, the first refrigerant inlet / outlet pipe section 11 is connected to the pipe connected to the shut-off valve 4 of the outdoor unit of the air conditioner. The shut-off valve 4 is a valve that controls the opening and closing of the refrigerant pipe between the outdoor unit and the air conditioner. The second refrigerant inlet / outlet pipe section 12 is connected to a four-way valve 3. When the air conditioning system is in cooling mode, the high-temperature and high-pressure refrigerant compressed by the compressor 2 flows from the four-way valve 3 to the heat exchange tube 16 of the outdoor heat exchanger 1. After heat exchange in the outdoor heat exchanger 1, the refrigerant flows from the heat exchange tube 16 to multiple first branch pipe sections 13, and from the manifold section 14 to the first refrigerant inlet / outlet pipe section 11, flows through the shut-off valve 4, and then flows to the indoor unit of the air conditioner. In heating mode, the refrigerant enters the outdoor heat exchanger 1 from the first refrigerant inlet / outlet pipe section 11 and multiple first branch pipe sections 13. After heat exchange, it flows out of the outdoor heat exchanger 1 from multiple second branch pipe sections 15 and the second refrigerant inlet / outlet pipe section 12.

[0044] In one embodiment, in Figures 1-3 In one embodiment, the outdoor air conditioner is configured with top ventilation, such as... Figure 1 As shown, the outdoor air conditioner has a vent 101 on the top of its casing 10. For outdoor air conditioners with a top vent 101 and an outdoor heat exchanger 1 using aluminum pipes, outdoor dust and metal ions in rainwater can easily cause electrochemical corrosion to the aluminum pipes of the outdoor heat exchanger 1. Therefore, at least some of the pipes in the first branch pipe section 13, the second branch pipe section 15, the manifold pipe section 14, the first refrigerant inlet / outlet pipe section 11, and the second refrigerant inlet / outlet pipe section 12 can be provided with an anti-corrosion layer. Specifically, zinc plating can be used as an anti-corrosion layer on the aluminum pipes.

[0045] In one embodiment, such as Figures 3-5 As shown, the outdoor unit of the air conditioner also includes a high-pressure valve assembly, which includes a first three-way pipe 55, a second three-way pipe 56, a first three-way connecting pipe 53, a fourth connecting pipe 54, a shut-off valve 4, a one-way valve 6, a filter 7, and an expansion valve 8.

[0046] The first tee pipe 55 has a first port A, a second port B, and a third port C; the second tee pipe 56 has a fourth port D, a fifth port E, and a sixth port F; the first port A is connected to the first connecting pipe section 51; a third connecting pipe section 53 is connected between the second port B and the fifth port E; a fourth connecting pipe section 54 is connected between the third port C and the sixth port F; the fourth port D is configured to connect to the shut-off valve 4; a one-way valve 6 is provided on the third connecting pipe section 53, and the one-way valve 6 is configured to allow refrigerant to flow only in the direction of the shut-off valve 4; a filter 7 and an expansion valve 8 are provided on the fourth connecting pipe section 54, and filters 7 can be provided on both sides of the expansion valve 8.

[0047] Figure 4In the example, the first port A of the first tee pipe 55 is set upwards, and the end of the first connecting pipe section 51 with an inverted U-shaped structure that is away from the first transition pipe section 17 is inserted downwards into the first port A and welded to fix it.

[0048] When the air conditioning system is in cooling mode, the refrigerant is used according to... Figure 5 In the air conditioning system, the refrigerant flows in the opposite direction. In the outdoor heat exchanger 1, the refrigerant mainly flows from the third connecting pipe section 53 to the shut-off valve 4 via the one-way valve 8, and then to the indoor unit. In heating mode, the refrigerant flows in the reverse direction, passing through the shut-off valve 4 to the fourth connecting pipe section 54, where it is throttled by the expansion valve 8. The specific working principles of the air conditioning system for cooling and heating are not described in detail here.

[0049] In one embodiment, the second refrigerant inlet / outlet pipe section 12 is welded with a second transition pipe section 18 made of a second metal, and the second metal pipe also includes a second connecting pipe section 52, which is configured to be connected to the end of the second transition pipe section 18 that is away from the second refrigerant inlet / outlet pipe section 12.

[0050] The second refrigerant inlet / outlet pipe section 12 of the outdoor heat exchanger 1 can be pre-welded with the second filter pipe section 18. When assembling the outdoor air conditioning unit, the outdoor heat exchanger 1 is connected to the second connecting pipe section 52 through the second filter pipe section 18. Since the second filter pipe section 18 and the second connecting pipe section 52 are made of the same material, the welding operation of the second connecting pipe section 52 to the second filter pipe section 18 is relatively easy to implement on the assembly site.

[0051] Figure 5 In the example, the second refrigerant inlet / outlet pipe section 12 is configured to extend from top to bottom, the second transition pipe section 18 is a U-shaped pipe section with the opening facing upwards, and one end of the second transition pipe section 18 is connected to the downward-facing end of the second refrigerant inlet / outlet pipe section 12.

[0052] In this example, the second refrigerant inlet / outlet pipe section 12 is an aluminum pipe, and the second transition pipe section 18 is a copper or stainless steel pipe. The second transition pipe section 18 is designed to be inserted into the second refrigerant inlet / outlet pipe section 12 for welding. During the welding operation, the lower end of the second refrigerant inlet / outlet pipe section 12 can be facing upwards, and the second transition pipe section 18 can be inserted into the second refrigerant inlet / outlet pipe section 12. This allows solder to be placed between the second refrigerant inlet / outlet pipe section 12 and the second transition pipe section 18 to facilitate welding.

[0053] exist Figure 5 In the example, one end of the second connecting pipe section 52 is configured to be inserted downwards into the second transition pipe section 18 and welded, while the other end of the second connecting pipe section 52 is configured to be connected upwards to one of the downward-facing ports of the four-way valve 3. The port of the four-way valve 3 can be inserted into the port of the second connecting pipe section 52 for welding. Similarly, a pipe section with the port facing upwards is positioned on the outside to accommodate solder within the port for easier welding.

[0054] In addition, due to the strong metallic activity of the aluminum pipeline, the exposed part of the first metal pipeline with an aluminum pipeline is located above the second metal pipeline or deviates from the exposed part of the second metal pipeline in the upward direction. Then, the metal ions generated on the second metal pipeline will not be dripped onto the aluminum pipeline by condensed water or rainwater under the action of gravity, thereby effectively avoiding the electrochemical corrosion of the aluminum pipeline caused by the reaction with other metal ions in the air conditioner outdoor unit. Herein, the exposed part is the part not covered by other components. For example, the exposed part of the aluminum pipeline is the part not covered by fins or heat shrink tubes, etc.

[0055] Due to the strong metallic activity of the aluminum pipeline, if there is water on the first transition pipe segment 17 or the second transition pipe segment 18, and the water flows from the first transition pipe segment 17 to the first refrigerant inlet and outlet pipeline 11, the copper ions or other metal ions in the water will corrode the aluminum. Therefore, as Figure 2 shown, the first refrigerant inlet and outlet pipe segment 11 can be set to include a first straight pipe segment 111 connected to the horizontal pipe segment 171. The horizontal pipe segment 171 includes a second straight pipe segment 1711 connected to the first straight pipe segment 111, and the first straight pipe segment 111 is not lower than the second straight pipe segment 1711. Herein, the fact that the first straight pipe segment 111 is not lower than the second straight pipe segment 1711 is in terms of the center line of the pipe segment. The center line of the first straight pipe segment 111 is not lower than the center line of the second straight pipe segment 1711. The first straight pipe segment 111 and the second straight pipe segment 1711 can both be horizontally arranged, or the direction from the first straight pipe segment 111 to the second straight pipe segment 1711 can be set to be inclined downward. The second transition pipe segment 18 is located below and connected to the second refrigerant inlet and outlet pipe segment 12.

[0056] In one embodiment, the part where the first transition pipe segment 17 is welded to the first refrigerant inlet and outlet pipe segment 11 can be covered with a heat shrink tube; and the part where the second transition pipe segment 18 is connected to the second refrigerant inlet and outlet pipe segment 12 can be covered with a heat shrink tube. By covering with a heat shrink tube, the part where the aluminum pipe is connected to the first transition pipe segment 17 and the second transition pipe segment 18 can be protected more effectively, preventing the aluminum from contacting other metal ions and being corroded.

[0057] The embodiment of the present application also provides an air conditioning system, including an air conditioner indoor unit and the air conditioner outdoor unit as described above.

[0058] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "perimeter", "the "mouth" structure", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0059] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0060] Although the embodiments disclosed in this utility model are as described above, the content described is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be defined by the appended claims.

Claims

1. An outdoor unit for an air conditioner, characterized in that, include: An outdoor heat exchanger and a system piping connected to the outdoor heat exchanger for transmitting refrigerant; the outdoor heat exchanger includes a first metal piping made of a first metal, and the system piping includes a second metal piping made of a second metal; The first metal pipeline includes a heat exchange tube and a first refrigerant inlet / outlet pipe section and a second refrigerant inlet / outlet pipe section connected to the heat exchange tube; the first refrigerant inlet / outlet pipe section is connected to a first transition pipe section made of the second metal, the first transition pipe section includes a horizontal pipe section connected to the first refrigerant inlet / outlet pipe section and a vertical pipe section that bends upward relative to the horizontal pipe section. The second metal conduit includes a first connecting pipe section, which is an inverted U-shaped pipe section. One end of the inverted U-shaped pipe section is inserted into the upper end of the vertical pipe section and welded to the vertical pipe section.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The first metal is aluminum, and the second metal is copper or stainless steel.

3. The outdoor unit of the air conditioner according to claim 2, characterized in that, The first transition pipe section is configured to be welded into the first refrigerant inlet / outlet pipe section.

4. The outdoor unit of the air conditioner according to claim 1, characterized in that, It also includes a high-pressure valve assembly, which includes a first three-way pipe, a second three-way pipe, a third connecting pipe, a fourth connecting pipe, a shut-off valve, a check valve, a filter, and an expansion valve; The first tee pipe has a first port, a second port and a third port, and the second tee pipe has a fourth port, a fifth port and a sixth port; the first port is connected to the first connecting pipe segment, a third connecting pipe segment is connected between the second port and the fifth port, a fourth connecting pipe segment is connected between the third port and the sixth port, and the fourth port is connected to the shut-off valve; The third connecting pipe section is equipped with the one-way valve, which is configured so that the refrigerant flows only in the direction of the shut-off valve. The fourth connecting pipe section is equipped with the filter and the expansion valve.

5. The outdoor unit of the air conditioner according to claim 4, characterized in that, The first port is positioned upwards, and the end of the first connecting pipe segment furthest from the first transition pipe segment is inserted downwards into the first port and welded in place.

6. The outdoor unit of the air conditioner according to claim 1, characterized in that, The second refrigerant inlet / outlet pipe section is connected to a second transition pipe section made of the second metal; The second metal pipe also includes a second connecting pipe section, which is configured to connect to the end of the second transition pipe section that is away from the second refrigerant inlet / outlet pipe section.

7. The outdoor unit of the air conditioner according to claim 6, characterized in that, The second refrigerant inlet / outlet pipe section is configured to extend from top to bottom, and the second transition pipe section is a U-shaped pipe section with the opening facing upward. One end of the second transition pipe section is connected to the downward-facing end of the second refrigerant inlet / outlet pipe section.

8. The outdoor unit of the air conditioner according to claim 7, characterized in that, One end of the second connecting pipe section is configured to be inserted downward into the second transition pipe section and welded, while the other end is configured to be connected upward to one of the downward-facing ports of the four-way valve.

9. The outdoor unit of an air conditioner according to any one of claims 1-8, characterized in that, The heat exchange tubes are provided in multiple ways, and the outdoor heat exchanger is also provided with multiple first branch pipe sections and multiple second branch pipe sections. One of the first branch pipe sections and the second branch pipe sections is configured to supply refrigerant to at least a portion of the heat exchange tubes, and the other is configured to receive refrigerant flowing out of at least a portion of the heat exchange tubes. Among them, multiple first branch pipe sections are connected to a manifold pipe section, the manifold pipe section is connected to one end of a heat exchange pipe located at the bottom, and the first refrigerant inlet / outlet pipe section is connected to the other end of the heat exchange pipe at the bottom; multiple second branch pipe sections are connected to the second refrigerant inlet / outlet pipe section.

10. An air conditioning system, characterized in that, It includes an indoor air conditioning unit and an outdoor air conditioning unit according to any one of claims 1-9.

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