Air conditioner outdoor unit

Abstract

The utility model discloses an air conditioner outdoor unit, and belongs to the technical field of air conditioners. The air conditioner outdoor unit comprises a machine shell and a micro-channel heat exchanger, an air inlet is formed in the machine shell, the micro-channel heat exchanger comprises flat pipes and fins, and each fin comprises a connecting part extending in the height direction; the fin bodies are arranged at intervals in the height direction and connected to the end, close to the air inlet, of the connecting part, and a flat pipe groove is formed in the space between every two adjacent fin bodies and used for being connected with a flat pipe in an inserted mode; the windowing area is arranged on the fin main body; and the water guide part protrudes out of the fin body and is located above the windowing area, and the end, away from the air inlet, of the water guide part extends to the connecting part. The problem that the heat exchange performance is affected due to the fact that the drainage performance of the windowing area is poor is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning, and in particular relates to an outdoor unit of an air conditioner. Background Art

[0002] Air conditioner outdoor units are typically installed outdoors to exchange heat with the outdoor environment. These units consist of a housing housing a heat exchanger assembly and an outdoor fan. These heat exchangers typically consist of copper tube-fin heat exchangers and insert-type microchannel heat exchangers. The insert-type microchannel heat exchanger has the potential to completely replace copper tube-fin heat exchangers due to its higher heat transfer coefficient, lighter weight, and reduced refrigerant charge.

[0003] A microchannel heat exchanger consists of several flat tubes through which refrigerant circulates, with fin bodies positioned between adjacent tubes for heat dissipation. When the surface temperature of the fin bodies falls below the dew point of the air, water vapor in the air condenses into condensed water. Because the width of the flat tubes is arranged horizontally, the vast majority of the condensed or defrosted water on the heat exchanger's surface remains on the tubes. When the heat exchanger is operating, the water on the surface is affected by the horizontal force of the wind, making any remaining water above the tubes more likely to be blown toward the connection and accumulate at the bottom of the tubes. However, due to surface tension, the water at the bottom of the tubes is difficult to be blown away by the wind and remains suspended, making drainage more difficult and increasing wind resistance.

[0004] At the same time, existing fin bodies are often designed with windows and slots to enhance heat transfer efficiency. Condensed water easily forms water bridges in the gaps between these windows and slots. When the ambient temperature is below freezing, frost easily forms in these gaps. Both water bridges and frost can clog the air duct, affecting heat transfer efficiency. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent.

[0006] In some embodiments, an air-conditioning outdoor unit is provided, which includes: a casing with an air inlet and an air outlet provided thereon; an outdoor fan, which is arranged in the casing and near the air outlet; a microchannel heat exchanger, which is arranged corresponding to the air inlet and is used to exchange heat with air driven by the outdoor fan, the end of the microchannel heat exchanger near the air inlet is the windward end, and the end opposite to the windward end is the leeward end, the microchannel heat exchanger includes: a flat tube, which is used to circulate refrigerant; a fin, the fin includes: a connecting part, which extends in the height direction; a fin body, which is connected to the end of the connecting part near the air inlet, the fin body has a plurality of fins arranged at intervals in the height direction, and the space between two adjacent fin bodies forms a flat tube groove for plugging the flat tube; a window area, which is provided on the fin body; a water guide part, the water guide part protrudes from the fin body and is located above the window area, and the end of the water guide part away from the air inlet extends to the connecting part, which is used to guide the condensed water on the flat tube to the connecting part when the condensed water flows to the water guide part.

[0007] The above technical solution has the following advantages or beneficial effects: by providing a water guide portion, the condensed water gathered on the lower edge of the flat tube can be blocked from flowing toward the window area, thereby avoiding increased wind resistance and deteriorated heat exchange in the window area due to frost, and effectively solving the problem of condensed water gathering on the lower surface of the flat tube and difficulty in draining water from the window area.

[0008] In some embodiments, the upper side surface of the water guide portion and the lower side surface of the water guide portion are connected by a first arc side surface at the end away from the air inlet, and the upper side surface of the water guide portion and the lower side surface of the water guide portion are connected by a second arc side surface at the end close to the air inlet.

[0009] The above technical solution has the following advantages or beneficial effects: by providing the first arc side surface and the second arc side surface, wind resistance can be reduced.

[0010] In some embodiments, in the direction from the windward end to the leeward end, the lower side surface of the water guide portion is tilted downward by α, α≤6°, α≥1.5°.

[0011] The above technical solution has the following advantages or beneficial effects: by setting the lower side surface of the water guide part to be inclined downward α, the condensed water on the water guide part can easily flow along the extension direction of the lower side surface to the connection part of the fin under the action of gravity and wind, and can flow smoothly downward through the connection part, thereby accelerating the drainage speed.

[0012] In some embodiments, the height dimension of the window area is gradually reduced from the windward end to the leeward end.

[0013] The above technical solution has the following advantages or beneficial effects: by providing the window area of ​​the above structure, the heat exchange effect is effectively enhanced.

[0014] In some embodiments, a drainage portion is formed on one side of the water guiding portion near the leeward end, and the drainage portion is in an arc shape extending downward.

[0015] The above technical solution has the following advantages or beneficial effects: By providing the drainage portion, the condensed water flows along the water guiding portion to the drainage portion and continues to flow downward along the drainage portion, accelerating the flow of the condensed water at the connecting portion.

[0016] In some embodiments, a first positioning portion extending outward is provided on the connecting portion. The distance between the leeward end of the fin and the first positioning portion is L1, and the distance between the leeward end of the fin and the water guiding portion is L5, where L1 < L5.

[0017] The above technical solution has the following advantages or beneficial effects: By setting L1 < L5, it effectively ensures that when the condensed water flows from the water guiding portion to the connecting portion and continues to flow downward, the drainage path will not be cut off by the first positioning portion.

[0018] In some embodiments, a second positioning portion is formed on the fin body at the lower edge of the flat tube groove. The distance between the leeward end of the fin and the center of the second positioning portion is L3, and the distance between the leeward end of the fin and the windward end of the water guiding portion is L4, where L3 < L4.

[0019] The above technical solution has the following advantages or beneficial effects: By setting L3 < L4, it ensures that the water blocked by the second positioning portion can fall on the water guiding portion instead of flowing to the window area. The window area only needs to drain the condensed water generated by its own fin body, avoiding the problem of difficult drainage in the window area.

[0020] In some embodiments, a third positioning portion is formed on the fin body at the upper edge of the flat tube groove. The third positioning portion is relatively closer to the windward end of the fin than the second positioning portion.

[0021] The above technical solution has the following advantages or beneficial effects: By providing the third positioning portion and setting the third positioning portion in the upwind direction, it effectively reduces the blockage of the water film above the flat tube from flowing downward to the downwind direction.

[0022] In some embodiments, a protrusion protruding downward is provided on the second positioning portion.

[0023] The above technical solution has the following advantages or beneficial effects: By providing the protrusion, when the condensed water diffuses along the lower edge of the flat tube, the second positioning portion can play an effective blocking role to prevent the condensed water liquid film from diffusing upward to the upwind direction.

[0024] The fan is then moved along the air intake opening to the outside of the air outlet, and the fan is moved along the air intake opening to the outside of the air outlet, so that the fan can move along the air intake opening to the outside of the air outlet.

[0025] The above technical solution has the following advantages or beneficial effects: by providing a water guide portion, the condensed water gathered on the lower edge of the flat tube can be blocked from flowing toward the window area, so that the condensed water on the water guide portion flows toward the connecting portion under the action of wind, and flows downward through the connecting portion to drain water, thereby preventing the condensed water from remaining in the gap within the window area, resulting in an increase in the amount of residual condensed water on the fin surface, an increase in wind resistance, and a loss of the enhanced heat exchange effect of the window area, effectively solving the problem of condensed water accumulation on the lower surface of the flat tube and difficulty in draining the window area. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a cloud diagram of the residual water volume on the simulated surface of the fin drainage of an existing microchannel heat exchanger;

[0027] Figure 2 is a structural diagram of an air-conditioning outdoor unit according to one embodiment of the present disclosure;

[0028] Figure 3 This is a schematic diagram of the internal structure of an air-conditioning outdoor unit when in operation according to one embodiment of the present disclosure;

[0029] Figure 4 is a perspective view of a microchannel heat exchanger according to one embodiment of the present disclosure;

[0030] Figure 5 yes Figure 4 Front view of

[0031] Figure 6 is a perspective view of a fin assembly of a microchannel heat exchanger according to one embodiment of the present disclosure;

[0032] Figure 7 is a perspective view of a portion of fins of a microchannel heat exchanger according to one embodiment of the present disclosure;

[0033] Figure 8 yes Figure 7 Face up to Figure 1 ;

[0034] Figure 9 It is a drainage path for condensed water generated on the fins according to one embodiment of the present disclosure;

[0035] Figure 10 is a perspective view of a portion of fins of a microchannel heat exchanger according to another embodiment of the present disclosure;

[0036] Figure 11 yes Figure 7 Face up to Figure 2 ;

[0037] Figure 12 yes Figure 11 Partial cross-sectional view at AA;

[0038] Figure 13 yes Figure 7 A top view of

[0039] Figure 14 is a schematic diagram of a second positioning portion blocking the diffusion of a condensed water film according to one embodiment of the present disclosure;

[0040] Figure 15 yes Figure 7 Partial right view of;

[0041] Figure 16 yes Figure 13 A partial enlarged view of

[0042] Figure 17 is a perspective view of a portion of fins of a microchannel heat exchanger according to another embodiment of the present disclosure;

[0043] Figure 18 is a structural diagram of a window area according to another embodiment of the present disclosure;

[0044] Figure 19 This is a simulated cloud diagram of wind speed of a portion of fins of a microchannel heat exchanger according to one embodiment of the present disclosure;

[0045] Figure 20 is a schematic diagram of a bending microchannel heat exchanger according to another embodiment of the present disclosure;

[0046] Figure 21 1 is a diagram showing the strength simulation results of the fin and the existing flat sheet according to one embodiment of the present disclosure.

[0047] In the above figures: 1. Casing; 11. Air inlet; 12. Air outlet; 2. Outdoor fan; 3. Microchannel heat exchanger; 31. Fin; 311. Connecting part; 312. Fin body; 32. Flat tube; 33. Window area; 331. Window unit; 3311. Window sheet; 34. Water guide; 341. Drainage part; 342. Bottom wall; 35. First positioning part; 36. Second positioning part; 361. Protrusion; 37. Third positioning part; 38. Flat tube groove. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0049] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0050] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments, unless there is a conflict.

[0051] The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. The terms "first", "second", "third" and the like involved in this application are merely to distinguish similar objects, and do not represent a specific ordering of objects.

[0052] In addition, the present invention may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0053] The utility model provides an air conditioner outdoor unit, Figures 2 to 21 The air conditioner outdoor unit provided in this application is described. The air conditioner outdoor unit is an outdoor unit of the air conditioner, which is usually installed outdoors to exchange heat with the outdoor environment.

[0054] refer to Figure 2 In an exemplary embodiment of an air-conditioning outdoor unit provided by the present invention, the air-conditioning outdoor unit includes a casing 1 , which forms the overall appearance of the air-conditioning outdoor unit.

[0055] The housing 1 defines an accommodation space inside, and the accommodation space is used to install and fix various components of the air conditioner outdoor unit. The housing 1 has a top end and a bottom end, and the top end and the bottom end are two ends of the housing 1 that are oppositely arranged in the height direction.

[0056] Continue to refer Figure 2 The housing 1 may include an air inlet 11. The air inlet 11 is communicated with the accommodating space and serves as an inlet for external air to flow into the housing 1.

[0057] The housing 1 may include an air outlet 12. The air outlet 12 is communicated with the accommodation space and serves as an outlet for the heat-exchanged air in the housing 1 to flow out.

[0058] Outdoor air outside the casing 1 enters the casing 1 through the air inlet 11 and is finally discharged to the outside through the air outlet 12 .

[0059] In this embodiment, the air inlet 11 can be provided on the side of the housing 1, and the air outlet 12 is located at the top of the housing 1. The air inlet 11 can be provided on the left side, right side and rear side of the housing 1.

[0060] It should be noted that the direction described in the article is based on the direction in which the user is facing the air-conditioning outdoor unit. The side of the air-conditioning outdoor unit facing the user when in use is defined as the front side, the opposite side is defined as the rear side, and the left and right sides are distinguished based on the direction in which the user is facing the air-conditioning outdoor unit.

[0061] The air conditioner outdoor unit may include a heat exchanger assembly, which is arranged in the accommodating space for exchanging heat with the air in the casing 1. The heat exchanger assembly may be installed on the inner side of the air inlet 11.

[0062] To minimize the size of the air conditioner outdoor unit and increase its heat exchange area, the heat exchanger assembly is positioned relative to the air inlet side. Specifically, in this embodiment, a portion of the heat exchanger assembly corresponds to the air inlet 11 on the rear side of the housing 1, while the remaining portion corresponds to the air inlets 11 on the sides of the housing 1.

[0063] In some embodiments of the present application, the air conditioner outdoor unit may include an outdoor fan 2, which is disposed in the housing 1 and close to the air outlet 12. The outdoor fan 2 may be an axial flow fan.

[0064] refer to Figure 3 , the outdoor fan 2 can be arranged toward the air outlet 12 , that is, the outdoor fan 2 is arranged between the heat exchanger assembly and the air outlet 12 .

[0065] In this embodiment, the outdoor fan 2 is installed between the heat exchanger assembly and the air outlet 12. Under the action of the outdoor fan 2, outdoor air enters the accommodation space through the air inlet 11, exchanges heat with the heat exchanger assembly within the accommodation space, and is then driven by the outdoor fan 2 to be discharged from the housing 1 through the air outlet 12.

[0066] The air conditioner outdoor unit may include a compressor, which is disposed in a receiving space within the casing 1 .

[0067] It is understood that the housing 1 may include a chassis. The chassis serves as the foundation of the air conditioner outdoor unit and is used to provide mounting locations for components such as the compressor and heat exchanger assembly. The chassis forms the bottom end of the housing 1.

[0068] The air conditioner may include a throttling device for throttling. The throttling device may be arranged in the air conditioner indoor unit or the air conditioner outdoor unit.

[0069] An air conditioner may include a refrigerant circuit. Connecting piping connects the indoor and outdoor units of the air conditioner to form a refrigerant circuit. The air conditioner uses this refrigerant circuit to circulate through the compressor, condenser, throttling device, and evaporator, enabling indoor cooling or heating.

[0070] The air conditioner may include an indoor unit, ie, an air conditioner indoor unit, which includes an indoor heat exchanger.

[0071] The indoor heat exchanger and the heat exchanger assembly function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0072] The refrigeration cycle and heating cycle include compression process, condensation process, expansion process and evaporation process. The refrigerant absorbs and releases heat to provide cooling or heat to the indoor space, thereby achieving temperature regulation of the indoor space.

[0073] The compressor compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas, and the discharged refrigerant gas flows into the condenser.

[0074] The condenser condenses the compressed high-temperature and high-pressure gaseous refrigerant into liquid refrigerant, and the heat is released to the surrounding environment through the condensation process.

[0075] The liquid refrigerant flowing out of the condenser enters the throttling device, which expands the high-temperature and high-pressure liquid refrigerant condensed by the condenser into a low-pressure liquid refrigerant.

[0076] The low-pressure liquid refrigerant flowing out of the throttling device enters the evaporator. When the liquid refrigerant flows through the evaporator, it absorbs heat and evaporates into low-temperature and low-pressure refrigerant gas. The refrigerant gas in a low-temperature and low-pressure state returns to the compressor.

[0077] The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the above-mentioned entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0078] In some embodiments of the present application, the heat exchanger assembly may include a microchannel heat exchanger 3. Figure 2 、 Figure 3 The microchannel heat exchanger 3 is arranged corresponding to the air inlet 11 and is used to exchange heat with the air driven by the outdoor fan 2.

[0079] refer to Figure 4 The microchannel heat exchanger 3 is a plug-in type microchannel heat exchanger 3. Among them, the end of the microchannel heat exchanger 3 close to the air inlet 11 is the windward end, and the end opposite to the windward end is the leeward end.

[0080] The microchannel heat exchanger 3 may include a vertically arranged fin assembly. The fin assembly may include a plurality of fins 31. The plurality of fins 31 are vertically arranged and spaced apart along an arrangement direction. The arrangement direction of the plurality of fins 31 is perpendicular to the vertically arranged fins 31, i.e., the arrangement direction is the thickness direction of the fins 31.

[0081] like Figure 5 From the perspective shown, the right end of the fin 31 is the windward end, and the left end is the leeward end; multiple fins 31 are arranged in the longitudinal direction.

[0082] refer to Figures 4 to 6 Each fin 31 may include a connecting portion 311. The connecting portion 311 is extended along the height direction of the housing 1, and one end of the connecting portion 311 is the leeward end. The height direction is the F1 direction.

[0083] Each fin 31 may include a plurality of fin bodies 312. The plurality of fin bodies 312 are connected to one end of the connecting portion 311 close to the air inlet 11, and the plurality of fin bodies 312 are arranged at intervals along the height direction. Figure 5 The dotted line shown in FIG is the boundary line between the connecting portion 311 and the fin body 312 .

[0084] like Figure 6 As shown, the connecting portion 311 is connected to the plurality of fin bodies 312 as a whole.

[0085] Continue to refer Figure 6 A flat tube slot 38 is formed between the sides of two upper and lower adjacent fin bodies 312, and the notch of the flat tube slot 38 is away from the connecting portion 311. In other words, the notch of the flat tube slot 38 is arranged toward the windward end.

[0086] For further reference, Figure 4 The microchannel heat exchanger 3 may include a plurality of flat tubes 32. The plurality of flat tubes 32 are correspondingly inserted into the flat tube grooves 38 and extend along an arrangement direction. The arrangement direction is the F2 direction.

[0087] It is understandable that a medium flow channel is formed in the flat tube 32 , and refrigerant flows in the medium flow channel.

[0088] In this embodiment, all fins 31 of the fin group have the same structure and size and are aligned with each other in the arrangement direction to facilitate processing and assembly.

[0089] In the related art, the flat tubes 32 are arranged in the horizontal direction, and most of the defrost water on the surface of the microchannel heat exchanger 3 is retained on the surface of the flat tubes 32. Figure 1This is a cloud diagram of the residual water volume on the surface of a partial microchannel fin 31 during drainage simulation. The drainage path is as follows: ① Condensed water / defrost water gathers on the upper surface of the flat tube 32 → ② Under the action of surface tension, the condensed water / defrost water flows circumferentially along the wall of the flat tube 32 → ③ Gravity drives the condensed water / defrost water to flow downward.

[0090] It should be noted that the above simulation results are obtained without applying wind force. The amount of residual water on the upper surface of the flat tube 32 is greater than that on the lower surface. However, in actual use, when the microchannel heat exchanger 3 is working, the water on the surface will be affected by the horizontal wind force. The residual water above the flat tube 32 is more likely to be blown toward the connecting portion 311 by the wind and gather toward the lower edge of the flat tube 32 through path ②. The water gathered at the lower edge of the flat tube 32 is difficult to be blown away by the wind due to the effect of surface tension and always hangs, making drainage more difficult and increasing wind resistance.

[0091] To enhance heat exchange and reduce the volume of the microchannel heat exchanger 3, a window area 33 is typically provided on the fin body 312. The provision of the window area 33 disrupts the air boundary layer, complicating the otherwise smooth drainage path ③. The window area 33 may include several louvers with narrow gaps between them. Due to capillary action, condensed water can accumulate in the gaps between the louvers, increasing the amount of residual condensed water on the surface of the fin 31, increasing wind resistance, and negating the louvers' ability to enhance heat exchange.

[0092] In order to solve the problem of condensed water accumulation on the lower surface of the flat tube 32 and difficulty in draining the window area 33 , in some embodiments of the present application, the microchannel heat exchanger 3 may include a water guide 34 .

[0093] The water guide portion 34 protrudes from the fin body 312 , and is located above the window area 33 .

[0094] It is understandable that the number of the water guides 34 is configured to be consistent with the number of the fin bodies 312. The water guides 34 are provided on the fin bodies 312 in a one-to-one correspondence.

[0095] refer to Figure 7 In this embodiment, one end of the water guide portion 34 away from the air inlet 11 extends to the connecting portion 311 , and is used to guide the condensed water on the flat tube 32 to the connecting portion 311 when the condensed water flows toward the water guide portion 34 .

[0096] The water guide portion 34 is configured to block the condensed water gathered at the lower edge of the flat tube 32 from flowing toward the window area 33 and guide the condensed water to flow toward the connecting portion 311 .

[0097] By providing the water guide portion 34, the condensed water gathered at the lower edge of the flat tube 32 can be blocked from flowing toward the window area 33, thereby preventing the condensed water from being retained in the window area 33 and increasing wind resistance and deteriorating heat exchange, thereby effectively solving the problem of condensed water gathering on the lower surface of the flat tube 32 and difficulty in draining the window area 33.

[0098] Specifically, when the surface of the fin 31 produces melted water due to defrosting or condensed water due to cooling and condensation, a considerable portion will flow to the upper surface of the flat tube 32 under the action of gravity. The condensed water on the upper edge of the flat tube 32 is blown downstream by the wind and flows along the arc line at the end of the flat tube 32 to the lower edge of the flat tube 32. Due to the existence of the water guide 34, the condensed water / melt water will gather between the flat tube 32 and the water guide 34, cutting off the condensed water / melt water. Figure 1 The drainage path in ③ prevents condensed water from flowing to the window area 33, thereby increasing wind resistance and deteriorating heat exchange.

[0099] At the same time, the water guide part 34 can play a guiding role. The condensed water / defrosted water on the water guide part 34 flows toward the connecting part 311 along its own extension direction under the action of wind, and flows downward through the connecting part 311 to drain water, thereby preventing the condensed water / defrosted water from remaining in the gap within the window area 33, resulting in an increase in the amount of residual condensed water on the surface of the fin 31 and an increase in wind resistance, thereby avoiding the loss of the enhanced heat exchange effect of the window area 33.

[0100] In other embodiments, the water guide portion 34 can be provided on the fin body 312 and located above the window area 33. The end of the water guide portion 34 away from the air inlet 11 extends to the connecting portion 311. The water guide portion 34 is configured to guide the condensed water toward the connecting portion 311 while blocking the condensed water from flowing downward toward the window area 33.

[0101] In some embodiments of the present application, the upper side surface of the water guide portion 34 and the lower side surface of the water guide portion 34 are connected by a first arc side surface at the end away from the air inlet 11, and the upper side surface of the water guide portion 34 and the lower side surface of the water guide portion 34 are connected by a second arc side surface at the end close to the air inlet 11. The provision of the first arc side surface and the second arc side surface helps to reduce wind resistance.

[0102] In some embodiments of the present application, in the direction from the windward end to the leeward end, the lower side surface of the water guide portion 3 is tilted downward by α.

[0103] By setting the lower side of the water guide part 34 to be tilted downward α, the condensed water on the water guide part 34 can easily flow along the extension direction of the lower side to the connection part 311 of the fin 31 under the action of gravity and wind, and can flow smoothly downward through the connection part 311, thereby accelerating the drainage speed.

[0104] In some embodiments of the present application, the upper side surface of the water guide portion 3 is extended along the length direction of the flat tube groove 38 .

[0105] refer to Figure 9 The upper side of the water guide 3 extends along the length of the flat tube groove 38. In the direction from the windward end to the leeward end, the lower side of the water guide 3 is tilted downward by α. This arrangement makes the water guide 34 arranged horizontally and makes the horizontal water guide 34 have a slope. The droplets of condensed water or defrosted water are 风 Under the action of the force, the water easily flows along the water guide portion 34 to the connecting portion 311 of the fin 31, and can flow smoothly downward through the connecting portion 311, thereby accelerating the drainage speed.

[0106] In some embodiments of the present application, in the direction from the windward end to the leeward end, the upper side surface of the water guide portion 3 is tilted downward by α, and the lower side surface of the water guide portion 3 is tilted downward by α.

[0107] refer to Figure 10 From the windward end to the leeward end, both the upper and lower sides of the water guide 34 are tilted downward by an angle α. This arrangement allows the water guide 34 to be tilted from top to bottom in this direction. The tilted water guide 34 effectively guides the flow. Due to gravity, wind, and the guiding effects of the water guide 34, droplets of condensed water or defrosted water on the water guide 34 easily flow along the water guide 34 toward the connection 311 of the fin 31. From there, they flow smoothly downward through the connection 311, accelerating drainage.

[0108] Specifically, refer to Figure 8 The water guide portion 34 has an upper sideline M and a lower sideline N. The lower sideline N forms an angle α with the longitudinal direction of the flat tube groove 38, and the opening of the angle α faces the connecting portion 311. The upper sideline M is arranged parallel to the longitudinal direction of the flat tube groove 38.

[0109] refer to Figure 10 The upper side line M is arranged parallel to the length direction of the flat tube groove 38, and the lower side line N forms an angle α with the opening toward the connecting portion 311 between the lower side line N and the length direction of the flat tube groove 38. That is, the lower side line N and the upper side line M form an angle α with the opening toward the connecting portion 311.

[0110] In some embodiments of the present application, α≤6° and α≥1.5°.

[0111] The angle α should not be too large. If it is too large, the slope of the water guide 34 will be too steep, which may occupy too much space in the window area 33 and affect the area of ​​the window area 33. The angle α is set to no greater than the first parameter value, which can be any value between 5° and 6°. Consider selecting an appropriate specific parameter during the specific design. For example, the first parameter value can be 6° to avoid excessive slope of the water guide 34.

[0112] The included angle α cannot be too small. If it is too small, the slope of the water guiding part 34 will be too small, weakening the gravitational effect of the condensed water and affecting the drainage efficiency. To ensure the drainage efficiency, the included angle α is set to be not less than the second parameter value. The second parameter value can be any value between 1.5° and 2.5°. When specifically designing, a suitable specific parameter is considered. For example, the second parameter value can be 1.5°, which can improve the drainage speed and efficiency.

[0113] In some embodiments of the present application, referring to Figure 6 , a first positioning part 35 is arranged to extend outward on the connecting part 311, and a plurality of first positioning parts 35 are provided corresponding to the fin body 312.

[0114] It should be noted that all the first positioning parts 35 face the same side of the fin group. Taking the perspective shown in Figure 4 as an example, all the positioning parts face the front side of the fin group.

[0115] By setting the first positioning part 35, on the one hand, when multiple fins 31 are installed on the microchannel heat exchanger 3, the distance between two adjacent fins 31 can be limited, enabling the two adjacent fins 31 to be arranged at equal intervals, which is convenient for positioning; on the other hand, the structural strength of the fin 31 can be enhanced.

[0116] Specifically, in two adjacent fins 31, the first positioning part 35 of one fin 31 abuts and fits against the surface of the connecting part 311 of the other fin 31. Thus, when the fin group is assembled, the fins 31 are aligned with each other and all the first positioning parts 35 face the same side. The first positioning part 35 of the previous fin 31 abuts and fits against the surface of the subsequent fin 31, which plays a positioning role in the assembly of the fins 31, and the length dimension of the first positioning part 35 limits the distance between adjacent fins 31, improving the assembly efficiency and accuracy of the fin group.

[0117] Referring to Figure 11 , the distance between the end of the connecting part 311 far from the fin body 312, that is, the leeward end of the connecting part 311, and the first positioning part 35 is L1, and the distance between the end of the connecting part 311 far from the fin body 312, that is, the leeward end of the connecting part 311, and the water guiding part 34 is L5, and L1 < L5.

[0118] In this embodiment, by setting L1 < L5, it is effectively ensured that when the condensed water flows from the water guiding part 34 to the connecting part 311 and then continues to flow downward, the drainage path will not be cut off by the first positioning part 35, ensuring the drainage effect.

[0119] In some embodiments of the present application, referring to Figure 6 , a second positioning part 36 is formed on the fin body 312 at the lower edge of the flat tube groove 38.

[0120] Referring to Figure 11 The distance between the leeward end of the connecting part 311 and the center of the second positioning part 36 is L3, and the distance between the leeward end of the connecting part 311 and the windward end of the water guiding part 34 is L4, where L3 < L4.

[0121] In this embodiment, by setting L3 < L4, it is ensured that the water blocked by the second positioning part 36 can fall on the water guiding part 34 instead of flowing towards the window area 33. The window area 33 only needs to drain the condensate generated by its own fin body 312, thus avoiding the problem of difficult drainage in the window area 33.

[0122] In some embodiments of the present application, referring to Figure 6 、 Figure 11 a third positioning part 37 is formed on the fin body 312 at the upper edge of the flat tube groove 38. The third positioning part 37 is closer to the windward end of the fin body 312 relative to the second positioning part 36. That is to say, the distance between the leeward end of the connecting part 311 and the center of the third positioning part 37 is L6, and L6 > L3.

[0123] By setting the third positioning part 37, the positioning effect of the installation of the fin group can also be achieved. In this embodiment, the third positioning part 37 is an L-shaped flanging structure bent upward.

[0124] The third positioning part 37 itself has a certain thickness and will block the downward flow of the water film above the flat tube 32 in the downwind direction. Therefore, the third positioning part 37 is set to be closer to the windward end relative to the second positioning part 36 to avoid blocking too much of the water film above the flat tube from flowing in the downwind direction. That is to say, the amount of the blocked water film can be reduced, making it easier for the water film to flow in the downwind direction and improving the drainage effect.

[0125] It can be understood that the closer the third positioning part 37 is to the windward end, the less water film it blocks, and the distance between it and the windward end can be designed according to actual needs.

[0126] In some embodiments of the present application, in the arrangement direction, the height dimension of the water guiding part 34 is H1. Among them, H1 < 3σ. H1 > 1.5σ. σ is the thickness dimension of the fin body 312. That is to say, H1 / σ < 3. H1 / σ > 1.5.

[0127] It should be noted that referring to Figure 12 the dimension of the water guiding part 34 in the fin thickness direction is H1.

[0128] The ratio H1 / σ between H1 and the thickness of the fin body 312 cannot be too large. If it is too large, the structure of the fin 31 may be subjected to greater stress, increasing the difficulty of manufacturing, and may cause the fin 31 to deform or damage. At the same time, it may increase the wind resistance of the water guide 34. In order to ensure structural stability and heat exchange effect, the ratio H1 / σ is set to no more than the third parameter value. The third parameter value can be any value between 2.5 and 3. Consider selecting a suitable specific parameter during the specific design. For example, the third parameter value can be 3 to ensure the structural stability of the fin 31 and the heat exchange effect of the heat exchanger.

[0129] The ratio H1 / σ between H1 and the thickness of the fin body 312 cannot be too small. If it is too small, the water guide 34 will not be able to block the condensed water from flowing to the window area 33 and drain the condensed water to the connecting portion 311. In order to ensure the blocking and drainage effects of the water guide 34, the ratio H1 / σ is set to be no less than the fourth parameter value. The fourth parameter value can be any value between 1.5 and 2. Consider selecting a suitable specific parameter during the specific design. For example, the fourth parameter value can be 1.5 to ensure that the water guide 34 can have a blocking and drainage effect.

[0130] refer to Figure 12 The water guide portion 34 may include a side wall 342 , which is arranged parallel to the fin body 312 .

[0131] The side wall 342 is connected to the fin body 312 by an inclined wall. The height dimension of the inclined wall is L7, wherein L7 / H1<1.5, 0.8 <L7 / H1。

[0132] In some embodiments of the present application, reference is made to Figure 11 The minimum distance between the end of the connecting portion 311 away from the fin body 312 and the flat tube groove 38 is L2. Here, L3-L2<0.5Lt, where Lt is the width of the flat tube 32.

[0133] In some embodiments of the present application, reference is made to Figure 13 The second positioning portion 36 is provided with a protrusion 361 protruding downward.

[0134] The protrusion 361 can be in a corrugated shape. By providing the protrusion 361, the second positioning portion 36 can more effectively block the condensed water from spreading along the lower edge of the flat tube 32, thereby preventing the condensed water film from spreading upward in the wind direction. Figure 14 The red portion is the condensed water film. In addition, the protrusion 361 also increases the strength of the second positioning portion 36, preventing the second positioning portion 36 from being crushed during the stacking process of the fins 31, resulting in the problem of overlapping of the fins 31.

[0135] In some embodiments of the present application, reference is made to Figure 15 The height dimension of the protrusion 361 is H2, H2<3σ, H2>1.5σ, and σ is the thickness dimension of the fin body 312.

[0136] It should be noted that the height dimension of the protrusion 361 is the maximum dimension of the protrusion 361 in the height direction.

[0137] In some embodiments of the present application, reference is made to Figure 16 The length dimension of the protrusion 361 is L8, L8 ≥ 2 mm. The length direction of the protrusion 361 is the dimension of the protrusion 361 in the length direction of the flat tube groove 38.

[0138] The length L8 of protrusion 361 cannot be too small; otherwise, its blocking effect will not be achieved. To ensure its blocking effect, length L8 is set to be no less than the fifth parameter value. The fifth parameter value can be anywhere between 2 mm and 4 mm. An appropriate and specific parameter should be considered during the specific design. For example, the fifth parameter value can be 2 mm.

[0139] In some embodiments of this application, continue to refer to Figure 16 , the width of the protrusion 361 is L9, L9<Pf-0.3mm,L9> Pf=0.6 mm, Pf is the distance between two adjacent fins 31.

[0140] In this embodiment, the width dimension of the protrusion 361 is the dimension of the protrusion 361 in the thickness direction of the fin body 312. The first positioning portion 35 and the second positioning portion 36 are both L-shaped flange structures bent downward.

[0141] Width dimension L9 cannot be too small; otherwise, it will not effectively enhance the strength of second positioning portion 36. To enhance the strength of second positioning portion 36, width dimension L9 is set to be greater than the sixth parameter value. The sixth parameter value can be any value between Pf - 0.6 mm and Pf - 0.5 mm. Consider selecting an appropriate and specific parameter during the specific design. For example, the sixth parameter value can be Pf - 0.6 mm.

[0142] Width dimension L9 should not be too large. If it is too large, the thickness of the flange of second positioning portion 36 will be too small, which will also affect the structural strength of second positioning portion 36. To enhance the strength of second positioning portion 36, width dimension L9 is set to be less than the seventh parameter value. The seventh parameter value can be any value between Pf-0.3mm and Pf-0.4mm. Consider selecting an appropriate and specific parameter during the specific design. For example, the seventh parameter value can be Pf-0.3mm.

[0143] In some embodiments of the present application, reference is made to Figure 17The water guide portion 34 is formed with a drainage portion 341 on one side close to the leeward end, and the drainage portion 341 is in an arc shape extending downward. Among them, the drainage portion 341 is in an arc shape with an opening toward the windward end and is tilted downward.

[0144] In this embodiment, a drainage portion 341 is provided on the connecting portion 311, and the drainage portion 341 is bent toward the windward end, so that the condensed water flows along the water guide portion 34 to the drainage portion 341 under the dual action of gravity and wind, and continues to flow downward along the drainage portion 341, thereby accelerating the discharge of the condensed water on the leeward side and reducing the accumulation of condensed water in the gap of the window area 33.

[0145] At the same time, the drainage portion 341 can guide the condensed water to avoid the first positioning portion 35, so as to prevent the first positioning portion 35 from blocking the drainage path.

[0146] Specifically, the drainage portion 341 has an outer arc contour line, an inner arc contour line, and a bottom arc contour line. Figure 17 The outer arc center angle corresponding to the outer arc contour line is θ1, and the inner arc center angle corresponding to the inner arc contour line is θ2, where θ1<θ2.

[0147] In this embodiment, an angle γ is formed between the center line of the bottom arc contour line and the upper edge line M of the water guide portion 34 , wherein the angle γ>90°, which is conducive to accelerating the flow of condensed water in the connecting portion 311 .

[0148] In some embodiments of the present application, the window area 33 includes at least one window unit 331 .

[0149] The window unit 331 includes a plurality of window fins 3311 arranged at equal intervals along the length of the flat tube slot 38. By providing the window unit 331, when air flows through the window fins 3311, the air pressure can be adjusted to better drain condensed water between the fins 31, further reducing thermal resistance and improving the heat exchange effect of the microchannel heat exchanger 3.

[0150] refer to Figure 17 , the window area 33 may include a continuous window unit 331. Of course, in some other embodiments, reference Figure 18 The windowing area 33 may include at least two discontinuous windowing units 331. The at least two windowing units 331 may be arranged at equal intervals.

[0151] In this embodiment, the length of the window area 33 does not exceed the flat tube 32. At the same time, the width of the window unit 331 is gradually reduced in the direction from the windward end to the leeward end.

[0152] refer to Figure 11, the maximum width dimension of the window opening area 33 is W1, and the width dimension of the fin body 312 between the flat tubes 32 is W2, where W1 / W2 < 0.7 and W1 / W2 > 0.3.

[0153] Reference Figure 18 , the window opening unit 331 is in the shape of a right trapezoid, and the angle of the oblique waist of the right trapezoid is β, where β = α.

[0154] Specifically, the window opening unit 331 has a top boundary line and a bottom boundary line. The bottom boundary line is arranged parallel to the length direction of the flat tube groove 38, and an included angle β with an opening facing the connecting part 311 is formed between the top boundary line and the bottom boundary line. In this embodiment, β = α.

[0155] In this embodiment, the window opening area 33 and the water guiding part 34 of the fin 31 adopt an asymmetric design. In the gravity direction, the upper position is the position of the horizontal water guiding part 34, and the lower area is the window opening area 33. Since the wind resistance of the window opening area 33 is greater than that of the horizontal water guiding part 34, the wind speed of the horizontal water guiding part 34 is greater than that of the window opening area 33. Reference Figure 19 Shown in the wind speed simulation cloud map, where red represents high wind speed and blue represents low wind speed.

[0156] Through simulation, the oncoming wind speed is 1.7 m / s, but the wind speed at the water guiding part 34 is as high as 5 m / s. At such a high wind speed, it is more conducive to blowing the condensed water along the water guiding part 34 to the connecting part 311 in the downwind direction, improving the drainage rate.

[0157] For the air conditioner outdoor unit provided by the present utility model, the microchannel heat exchanger 3 adopted by it not only improves the drainage performance of the fin 31 but also improves the strength of the fin 31 by arranging the horizontal water guiding part 34 and the first positioning part 35.

[0158] It should be noted that the smaller the distance L1 from the water guiding part 34 to one end of the connecting part 311 and the distance L5 from the first positioning part 35 to one end of the connecting part 311, the better the strength. Therefore, in order to better improve the strength of the fin 31, in this embodiment, L5 < 4 mm and L1 < L5. Preferably, L1 = 2 mm.

[0159] Since the outdoor heat exchanger usually needs to be bent and installed into the whole machine, and the microchannel heat exchanger 3 usually adopts the method of furnace brazing, the strength of the fin 31 will decrease after welding, and it will be more difficult to bear the external force and倒伏 during the bending process. The bending process is as Figure 20 Shown, the connecting part 311 of the fin 31 will contact the roller shaft and receive the reaction force of the roller shaft on the fin 31. The thicker the outdoor heat exchanger and the smaller the bending radius, the greater the force received. If a flat sheet without any strengthening structure is used, the fin 31 in the bending area will倒伏, making the heat exchanger unable to ventilate.

[0160] In this embodiment, the strength of the fin 31 is verified by simulation. The simulation model is as follows: Figure 7 As shown in FIG, a force perpendicular to the fin 31 is applied to the end surface of the connection portion 311 of the fin 31, and the deformation is used to characterize the strength of the fin 31. The simulation results are shown in FIG. Figure 21 As shown, under the same acting force, the strength of the fin 31 in this embodiment is increased by 70% compared with the flat sheet.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

[0162] For ease of explanation, the above description has been presented in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioner outdoor unit, characterized in that: include: a housing, on which an air inlet and an air outlet are provided; an outdoor fan, disposed in the housing and close to the air outlet; A microchannel heat exchanger is provided corresponding to the air inlet and is used to exchange heat with the air driven by the outdoor fan. The microchannel heat exchanger includes: Flat tubes, used to circulate refrigerant; The fin comprises: a connecting portion extending in a height direction; A fin body connected to one end of the connecting portion close to the air inlet, wherein the fin body comprises a plurality of fin bodies spaced apart in the height direction, and a space between two adjacent fin bodies forms a flat tube groove for inserting the flat tube; a window area, provided on the fin body; A water guide portion is provided on the fin body and is located above the window area. An end of the water guide portion away from the air inlet extends to the connecting portion and is used to guide the condensed water on the flat tube to the connecting portion when the condensed water flows toward the water guide portion.

2. The air conditioner outdoor unit according to claim 1, characterized in that: The upper side surface of the water guide portion and the lower side surface of the water guide portion are connected by a first arc side surface at the end away from the air inlet, and the upper side surface of the water guide portion and the lower side surface of the water guide portion are connected by a second arc side surface at the end close to the air inlet.

3. The air conditioner outdoor unit according to claim 1, characterized in that: In the direction from the windward end to the leeward end of the fin, the lower side surface of the water guide portion is inclined downward by α, 1.5°≤α≤6°.

4. The air conditioner outdoor unit according to claim 3, characterized in that: In the direction from the windward end of the fin to the leeward end of the fin, the size of the window area in the height direction is gradually reduced.

5. The air conditioner outdoor unit according to claim 1, characterized in that: A drainage portion is formed on one side of the water guide portion close to the leeward end of the fin, and the drainage portion is in an arc shape extending downward.

6. The air conditioner outdoor unit according to claim 1, characterized in that: The connecting portion is provided with a first positioning portion extending outward, the distance between the leeward end of the fin and the first positioning portion is L1, the distance between the leeward end of the fin and the water guide portion is L5, L1 <L5。 7. The air conditioner outdoor unit according to claim 1, characterized in that: The fin body is formed with a second positioning portion located at the lower edge of the flat tube groove. The distance between the leeward end of the fin and the center of the second positioning portion is L3, and the distance between the leeward end of the fin and the end of the water guide portion close to the air inlet is L4. L3 <L4。 8. The air conditioner outdoor unit according to claim 7, characterized in that: The second positioning portion is provided with a protrusion protruding downward.

9. The air conditioner outdoor unit according to claim 7, characterized in that: A third positioning portion is formed on the fin body and is located at the upper edge of the flat tube groove. The third positioning portion is closer to the windward end of the fin relative to the second positioning portion.

10. An air conditioner outdoor unit, characterized in that: include: a housing, on which an air inlet and an air outlet are provided; an outdoor fan, disposed in the housing and close to the air outlet; A microchannel heat exchanger is provided corresponding to the air inlet and is used to exchange heat with the air driven by the outdoor fan. The microchannel heat exchanger includes: Flat tubes, used to circulate refrigerant; The fin comprises: a connecting portion extending in a height direction; A fin body connected to one end of the connecting portion close to the air inlet, wherein the fin body comprises a plurality of fin bodies spaced apart in the height direction, and a space between two adjacent fin bodies forms a flat tube groove for inserting the flat tube; a window area, provided on the fin body; A water guide portion protrudes from the fin body and is located above the window area. The end of the water guide portion away from the air inlet extends to the connecting portion. The water guide portion is configured to guide the condensed water toward the connecting portion while blocking the condensed water from flowing downward toward the window area.

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