Air conditioner outdoor unit and air conditioner system

Abstract

The utility model discloses an air conditioner outdoor unit and an air conditioning system. The air conditioner outdoor unit comprises a shell, a heat exchanger and a heat exchanger, the outdoor heat exchanger is installed in the shell, and the outdoor heat exchanger comprises an aluminum pipeline used for transmitting a refrigerant and fins wrapping at least part of the aluminum pipeline; wherein at least part of the exposed aluminum pipeline is provided with an anti-corrosion layer, so that the aluminum pipeline is prevented from being corroded by substances entering from the ventilation openings above. According to the technical scheme, dust or rainwater entering from the top ventilation opening is prevented from corroding the aluminum pipeline, and the service life of the air conditioning system can be prolonged.

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, aluminum is highly reactive and easily corrodes with other metal ions in the environment. Since the outdoor unit of an air conditioning system is exposed to the outdoors for extended periods, dust or rainwater containing metal ions can adhere to the surface of the aluminum pipes, causing corrosion and affecting the lifespan of the air conditioning system. Utility Model Content

[0004] This utility model provides an outdoor air conditioning unit and an air conditioning system to solve the problem that the aluminum pipes of the outdoor air conditioning unit are easily corroded outdoors.

[0005] An embodiment of this application provides an outdoor unit for an air conditioner, comprising:

[0006] The casing has a ventilation opening at the top.

[0007] An outdoor heat exchanger is installed inside the housing, the outdoor heat exchanger including aluminum pipes for transmitting refrigerant and fins covering at least a portion of the aluminum pipes.

[0008] The aluminum pipes, at least partially exposed, are provided with an anti-corrosion layer to prevent substances entering from the vents above from corroding them.

[0009] In one embodiment, the anti-corrosion layer is a zinc-plated layer.

[0010] In one embodiment, the aluminum pipeline includes a heat exchange tube installed on the fins, a plurality of first branch pipe sections, a plurality of second branch pipe sections, a first refrigerant inlet / outlet pipe section, and a second refrigerant inlet / outlet pipe section. The plurality of first branch pipe sections are connected to the first refrigerant inlet / outlet pipe section, and the plurality of second branch pipe sections are connected to the second refrigerant inlet / outlet pipe section. One of the first branch pipe sections and the second branch pipe sections is configured to supply refrigerant to the heat exchange tube, and the other is configured to receive refrigerant flowing out of the heat exchange tube.

[0011] At least one of the first branch pipe section, the second branch pipe section, the first refrigerant inlet / outlet pipe section, and the second refrigerant inlet / outlet pipe section is provided with the anti-corrosion layer.

[0012] In one embodiment, the aluminum pipeline further includes a manifold section, with a plurality of first branch pipe sections connected to the manifold section, and the manifold section connected to the first refrigerant inlet / outlet pipe section; wherein the manifold section is provided with the anti-corrosion layer.

[0013] In one embodiment, a predetermined metal conduit for transmitting refrigerant is further included; wherein,

[0014] The predetermined metal pipeline includes a first transition pipe section and a second transition pipe section. The first transition pipe section is welded to the first refrigerant inlet / outlet pipe section, and the second transition pipe section is welded to the second refrigerant inlet / outlet pipe section.

[0015] In one embodiment, the portion where the first transition pipe section is welded to the first refrigerant inlet / outlet pipe section is covered with heat shrink tubing.

[0016] In one embodiment, the portion where the second transition pipe section is welded to the second refrigerant inlet / outlet pipe section is covered with heat shrink tubing.

[0017] In one embodiment, 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.

[0018] In one embodiment, the second refrigerant inlet / outlet pipe section extends from top to bottom, and the second transition pipe section is a U-shaped pipe section connected to the lower end of the second refrigerant inlet / outlet pipe section, wherein the U-shaped pipe section bends away from the outdoor heat exchanger.

[0019] An embodiment of this application also provides an air conditioning system, characterized in that it includes an indoor air conditioning unit and an outdoor air conditioning unit as described above.

[0020] In the technical solution provided in this application, the outdoor unit of the air conditioner adopts a top ventilation method. By providing an anti-corrosion layer to at least part of the exposed aluminum pipes, it is possible to prevent dust or rainwater entering from the top ventilation opening from corroding the aluminum pipes. The at least part of the exposed aluminum pipes can be the portion of the pipes easily exposed to dust or rainwater entering from the top ventilation opening; alternatively, all exposed aluminum pipes can be provided with an anti-corrosion layer. By improving the corrosion resistance of the aluminum pipes in the air conditioning system, which are weak points in corrosion resistance, the lifespan of the air conditioning system can be extended.

[0021] 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

[0022] 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.

[0023] 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;

[0024] Figure 2 for Figure 1 An enlarged schematic diagram of the outdoor unit of the air conditioner at point M;

[0025] Figure 3 This is a partial structural diagram of an air conditioner outdoor unit according to one embodiment of this application;

[0026] Figure 4 This is a partial structural diagram of an air conditioner outdoor unit according to one embodiment of this application;

[0027] Figure 5 for Figure 4 A schematic diagram of the flow path of some of the pipelines;

[0028] Figure 6 This is a partial structural diagram of an air conditioner outdoor unit according to one embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 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

[0031] 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.

[0032] This application provides an outdoor unit for an air conditioner, such as... Figure 1As shown, the device includes a housing 10 and an outdoor heat exchanger 1. A vent 101 is provided at the top of the housing 10. The outdoor heat exchanger 1 is installed inside the housing 10 and includes aluminum pipes for transmitting refrigerant and fins covering at least a portion of the aluminum pipes. At least a portion of the exposed aluminum pipes is provided with an anti-corrosion layer to prevent substances entering through the vent 101 from corroding the aluminum pipes. The exposed aluminum pipes may be pipes not covered by fins or heat-shrink tubing.

[0033] In the technical solution provided in this application, the outdoor unit of the air conditioner adopts a top ventilation method. By providing an anti-corrosion layer to at least part of the exposed aluminum pipes, it is possible to prevent dust or rainwater entering through the top ventilation opening 101 from corroding the aluminum pipes. The at least part of the exposed aluminum pipes can be the portion of the pipes easily exposed to dust or rainwater entering through the top ventilation opening 101; alternatively, all exposed aluminum pipes can be provided with an anti-corrosion layer. By improving the corrosion resistance of the aluminum pipes in the air conditioning system, the lifespan of the air conditioning system can be extended.

[0034] It should be noted that "aluminum" as described in this application refers to materials made of aluminum or aluminum alloys, while "copper" as described below refers to materials made of copper or copper alloys.

[0035] In one embodiment, the anti-corrosion layer may be a zinc plating layer, or other chemical coatings may be used.

[0036] In one embodiment, such as Figures 1-3 As shown, the aluminum piping of the outdoor heat exchanger 1 includes heat exchange tubes 16 mounted on fins, multiple first branch pipe sections 13 and multiple second branch pipes 15, a first refrigerant inlet / outlet pipe section 11 and a second refrigerant inlet / outlet pipe section 12. The multiple first branch pipe sections 13 are connected to the first refrigerant inlet / outlet pipe 11, and the multiple second branch pipe sections 15 are connected to the second refrigerant inlet / outlet pipe 12. One of the first branch pipe sections 13 and the second branch pipe sections 15 is configured to supply refrigerant to the heat exchange tubes 16, and the other is configured to receive the refrigerant flowing out of the heat exchange tubes 16.

[0037] The outdoor heat exchanger 1 can be equipped with multiple heat exchange tubes 16. Each first branch pipe section 13 can branch the refrigerant at the refrigerant output end (or refrigerant input end) corresponding to one or more heat exchange tubes 16, and the second branch pipe section 15 can branch the refrigerant at the refrigerant input end (or refrigerant output end) corresponding to one or more heat exchange tubes 16. For example, when the first refrigerant inlet / outlet pipe section 11 is used as the refrigerant output end and the second refrigerant inlet / outlet pipe section 12 is used as the refrigerant input end, the refrigerant provided by the second refrigerant metal pipe section 12 is provided to the multiple heat exchange tubes 16 through multiple second branch pipe sections 15. After heat exchange, the refrigerant output from the heat exchange tubes 16 is transported to the first refrigerant inlet / outlet pipe section 11 through multiple first branch pipe sections 13.

[0038] In this embodiment, the first diversion pipe section 13, the second diversion pipe section 15, the first refrigerant inlet / outlet pipe section 11, and the second refrigerant inlet / outlet pipe section 12 may each be provided with an anti-corrosion layer.

[0039] The aluminum piping of the outdoor heat exchanger 1 may also include a manifold section 14, with multiple first branch pipe sections 13 connected to the manifold section 14, and the manifold section 14 further connected to the first refrigerant inlet / outlet pipe section 11; wherein, the manifold section 14 may be provided with an anti-corrosion layer. In this embodiment, the manifold section 14 is provided to connect the manifold section 14 to one end of the heat exchange tube 16 located at the bottom, and the first refrigerant inlet / outlet pipe section 11 is connected to the other end of the heat exchange tube 16 at the bottom, so that the first refrigerant inlet / outlet pipe section 11 can extend from the bottom of the outdoor heat exchanger 1;

[0040] exist Figures 1-3 In this embodiment, the first refrigerant inlet / outlet pipe section 11 is located below the air conditioner heat exchanger 1, and is 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 pipeline between the outdoor unit and the air conditioner. The second refrigerant inlet / outlet pipe section 12 is located above the air conditioner heat exchanger 1, and 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 tubes 16 of the outdoor heat exchanger 1. After heat exchange in the outdoor heat exchanger 1, the refrigerant flows from multiple heat exchange tubes 16 to multiple first branch pipe sections 13, and from the manifold pipe 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, refrigerant enters the outdoor heat exchanger 1 from the first refrigerant inlet / outlet pipe section 11, the manifold pipe section 14 and multiple first branch pipe sections 13, and after heat exchange, flows out of the outdoor heat exchanger 1 from multiple second branch pipe sections 15 and the second refrigerant inlet / outlet pipe section 12.

[0041] Since the outdoor unit of an air conditioner also includes pre-installed metal piping for transporting refrigerant, this piping in the air conditioning system must be made of a metal with good thermal conductivity and lower reactivity than aluminum. The higher the reactivity of the metal, the easier it is to lose electrons and form cations, i.e., the easier it is to produce a reaction. For example, aluminum is more reactive than copper, and aluminum easily loses electrons to replace copper ions. Pre-installed metal piping is usually made of copper, but it can also be made of stainless steel or other metals.

[0042] In one embodiment, the predetermined metal pipeline includes a first transition section 17 and a second transition section 18. The first transition section 17 is connected to the first refrigerant inlet / outlet section 11, and the second transition section 18 is connected to the second refrigerant inlet / outlet section 12. For example, if the predetermined metal pipeline is made of copper, then both the first transition section 17 and the second transition section 18 are copper pipelines. That is, to facilitate the connection between the outdoor heat exchanger 1 and the predetermined metal pipeline, the first transition section 17 and the second transition section 18 can be pre-connected to the outdoor heat exchanger 1. Then, during the assembly of the outdoor air conditioning unit, the first transition section 17 and the second transition section 18 on the outdoor heat exchanger 1 are welded to other predetermined metal pipelines of the outdoor air conditioning unit 1. Welding of the same material is easier to implement on-site, which helps to improve assembly efficiency.

[0043] Since the first refrigerant inlet / outlet pipe section 11 and the second refrigerant inlet / outlet pipe section 12 are aluminum pipes, the melting point of aluminum is lower than that of the predetermined metal pipes (such as copper pipes or stainless steel pipes) of the air conditioning system. During welding, the predetermined metal pipes can be inserted into the aluminum pipes for welding. That is, one end of the first transition pipe section 17 is inserted into the first refrigerant inlet / outlet pipe section 11 for welding, and one end of the second transition pipe section 18 is inserted into the second refrigerant inlet / outlet pipe section 12 for welding.

[0044] In one embodiment, the portion where the first transition pipe section 17 connects to the first refrigerant inlet / outlet pipe section 11 can be covered with heat shrink tubing; and the portion where the second transition pipe section 18 connects to the second refrigerant inlet / outlet pipe section 12 can be covered with heat shrink tubing. By covering with heat shrink tubing, the portions where the aluminum pipe connects to the first transition pipe section 17 and the second transition pipe section 18 can be more effectively protected, preventing the aluminum from being corroded by contact with other metal ions.

[0045] exist Figures 1-3 In this embodiment, the first refrigerant inlet / outlet pipe section 11 is located below the air conditioning heat exchanger 1, and the second refrigerant inlet / outlet pipe section 12 is located above the air conditioning heat exchanger 1. The first transition pipe section 17 may be configured to include 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. The predetermined metal pipeline also includes a first connecting pipe section 51, which is an inverted U-shaped pipe section. One end of the inverted U-shaped pipe is inserted into the upper end of the vertical pipe section 172 and welded to the vertical pipe section 172. Since 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, the annular gap between the outer periphery of the vertical pipe section 172 and the first connecting pipe section 51 can accommodate the solder, thus facilitating the welding of the two. Moreover, the first connecting pipe section 51 bends upward and then downward to connect with other pipes, which can avoid the space below, making the space layout inside the outdoor unit of the air conditioner more reasonable.

[0046] It should be noted that the “inverted U-shaped pipe segment” described in this application refers to a pipe segment with both ends facing downwards, and the “U-shaped pipe segment” described refers to a pipe segment with both ends facing upwards. The shape of the pipe between the two ends is not limited.

[0047] Because aluminum pipes are highly mobile, if there is water on the first transition pipe section 17, the water may flow from the first transition pipe section 17 to the first refrigerant inlet / outlet pipe 11 and corrode the aluminum pipes. Therefore, if... Figure 2 As shown, the first refrigerant inlet / outlet pipe section 11 may include a first straight pipe section 111 connected to the horizontal pipe section 171. The horizontal pipe section 171 includes a second straight pipe section 1711 connected to the first straight pipe section 111. The first straight pipe section 111 is not lower than the second straight pipe section 1711. The statement that the first straight pipe section 111 is not lower than the second straight pipe section 1711 refers to the centerline of the pipe section; the centerline of the first straight pipe section 111 is not lower than the centerline of the second straight pipe section 1711. The first straight pipe section 111 and the second straight pipe section 1711 may both be horizontally arranged, or the direction from the first straight pipe section 111 to the second straight pipe section 1711 may be inclined downwards.

[0048] In one embodiment, the predetermined metal pipeline further includes a second connecting pipe section 52, which is configured to connect to the end of the second transition pipe section 18 that is away from the second refrigerant inlet / outlet pipe section 12. Figure 6 In the example, the second refrigerant inlet / outlet pipe section 12 is configured to extend from top to bottom, and the second transition pipe section 18 is a U-shaped pipe section with its opening facing upwards. 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. In this way, water on the second transition pipe section 18 will not flow onto the second refrigerant inlet / outlet pipe section 12 and corrode the aluminum pipe.

[0049] Figure 6 In the example, one end of the second connecting pipe section 52 is configured to be inserted downwards into the end of the second transition pipe section 18 away from the second refrigerant inlet / outlet pipe section 12 and welded thereon. 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, allowing the port of the four-way valve 3 to be inserted into the port of the second connecting pipe section 52 for welding. Similarly, the pipe section with the port facing upwards is positioned on the outside to accommodate solder within the port for easier welding.

[0050] 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.

[0051] The first three-way pipe 55 has a first port A, a second port B, and a third port C, and the second three-way 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, and the fourth port D is arranged to be connected to the stop valve 4; wherein, a check valve 6 is arranged on the third connecting pipe section 53, and the check valve 6 is arranged such that the refrigerant only flows in the direction towards the stop valve 4, a filter 7 and an expansion valve 8 are arranged on the fourth connecting pipe section 54, and the filter 7 can be arranged on both sides of the expansion valve 8 respectively.

[0052] Figure 4 In the example of , the first port A of the first three-way pipe 55 is arranged upwards, and the end of the first connecting pipe section 51 with an inverted U-shaped structure, which is far away from the first transition pipe section 17, is inserted downwards into the first port A and fixed by welding.

[0053] When the air-conditioning system adopts the refrigeration mode, the refrigerant flows according to the Figure 5 flow direction in Figure 5 . The refrigerant of the outdoor heat exchanger 1 mainly flows from the third connecting pipe section 53 towards the stop valve 4 through the check valve 8, and then flows to the indoor unit; when adopting the heating mode, the refrigerant flows reversely, and the refrigerant flows towards the fourth connecting pipe section 54 through the stop valve 4 and is throttled by the expansion valve 8. The specific working principles of the air-conditioning system for refrigeration and heating are not specifically described herein.

[0054] The embodiment of the present application further provides an air-conditioning system, including an air-conditioning indoor unit and the air-conditioning outdoor unit as described above.

[0055] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "up", "down", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "perimeter", "the "mouth" character structure", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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 therefore cannot be understood as a limitation to the present utility model.

[0056] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "connected", "directly connected", "indirectly connected", "fixedly connected", "installed", "assembled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; the terms "installed", "connected", "fixedly connected" may be directly connected or indirectly connected through an intermediate medium, and may be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0057] 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 air conditioner outdoor unit characterized by comprising: include: The casing has a ventilation opening at the top. An outdoor heat exchanger is installed inside the housing, the outdoor heat exchanger including aluminum pipes for transmitting refrigerant and fins covering at least a portion of the aluminum pipes. The aluminum pipes, at least partially exposed, are provided with an anti-corrosion layer to prevent substances entering from the vents above from corroding them.

2. The air conditioner outdoor unit according to claim 1, characterized by The anti-corrosion layer is a zinc-plated layer.

3. The air conditioner outdoor unit according to claim 1 or 2, characterized by The aluminum piping includes a heat exchange tube installed on the fins, a plurality of first branch pipe sections, a plurality of second branch pipe sections, a first refrigerant inlet / outlet pipe section, and a second refrigerant inlet / outlet pipe section. The plurality of first branch pipe sections are connected to the first refrigerant inlet / outlet pipe section, and the plurality of second branch pipe sections are connected to the second refrigerant inlet / outlet pipe section. One of the first branch pipe sections and the second branch pipe sections is configured to supply refrigerant to the heat exchange tube, and the other is configured to receive refrigerant flowing out of the heat exchange tube. At least one of the first branch pipe section, the second branch pipe section, the first refrigerant inlet / outlet pipe section, and the second refrigerant inlet / outlet pipe section is provided with the anti-corrosion layer.

4. The air conditioner outdoor unit according to claim 3, characterized by The aluminum pipeline also includes a manifold section, with multiple first branch pipe sections connected to the manifold section, and the manifold section connected to the first refrigerant inlet / outlet pipe section; wherein, the manifold section is provided with the anti-corrosion layer.

5. The air conditioner outdoor unit according to claim 3, characterized by It also includes predetermined metal piping for transmitting refrigerant; wherein, The predetermined metal pipeline includes a first transition pipe section and a second transition pipe section. The first transition pipe section is welded to the first refrigerant inlet / outlet pipe section, and the second transition pipe section is welded to the second refrigerant inlet / outlet pipe section.

6. The air conditioner outdoor unit according to claim 5, characterized by The portion of the first transition pipe section welded to the first refrigerant inlet / outlet pipe section is covered with heat shrink tubing.

7. The air conditioner outdoor unit according to claim 5, wherein The portion of the second transition pipe section that is welded to the second refrigerant inlet / outlet pipe section is covered with heat shrink tubing.

8. The air conditioner outdoor unit according to claim 5, characterized by 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.

9. The air conditioner outdoor unit according to claim 5, wherein The second refrigerant inlet / outlet pipe section extends from top to bottom, and the second transition pipe section is a U-shaped pipe section connected to the lower end of the second refrigerant inlet / outlet pipe section, wherein the U-shaped pipe section bends away from the outdoor heat exchanger.

10. An air conditioning system characterized by, 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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