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 shell, an air inlet and an air outlet, the heat exchanger is arranged in the shell corresponding to the air inlet, and the heat exchanger comprises a flat pipe used for circulating a refrigerant; the fins are connected with the flat tubes, and each fin comprises a fin body part, a plurality of fins and a plurality of fins, and each fin body part is provided with a slot in which the corresponding flat tube is inserted; a distance h is formed between the boss body part and the fin body part in the thickness direction of the fin, and the boss body part extends in the height direction of the fin; the first boss connecting part is connected between the boss body part and the fin body part and located at the end, close to the inserting groove, of the boss body part, the first boss connecting part is provided with a first notch forming part for forming a notch, and the first notch forming part is arranged corresponding to the inserting groove in the width direction of the fin. The air conditioner outdoor unit can improve the structural strength of the fins on the heat exchanger.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning outdoor unit. Background Art

[0002] Microchannel heat exchangers are used in some air conditioners. The microchannel heat exchangers include flat tubes and fins. The fins are provided with slots, and the flat tubes are plugged into the slots of the fins.

[0003] To meet the higher heat exchange load requirements of high-capacity air conditioners, microchannel heat exchangers require larger dimensions. For example, in a typical top-discharge outdoor unit, the fins are at least 2 meters tall. Furthermore, existing fin widths are typically less than 20 mm, meaning the fin aspect ratio exceeds 100. During production, handling, and assembly, these thin fins are prone to bending and deformation due to this disparate aspect ratio, increasing the defect rate of heat exchangers. Utility Model Content

[0004] The present application provides an air-conditioning outdoor unit, which can improve the fin strength and avoid the problem of high defective rate of microchannel heat exchanger.

[0005] In one aspect of the present application, an air-conditioning outdoor unit comprises: a shell provided with an air inlet; a heat exchanger provided in the shell corresponding to the air inlet, the heat exchanger comprising: a flat tube for circulating refrigerant; a fin connected to the flat tube, the fin comprising: a fin body provided with a slot for inserting the flat tube; a boss body having a distance h from the fin body in the thickness direction of the fin, the boss body extending along the height direction of the fin; a first boss connecting portion connected between the boss body and the fin body and located at one end of the boss body close to the slot, the first boss connecting portion having a first notch forming portion for forming a first notch, the first notch forming portion being arranged corresponding to the slot in the width direction of the fin.

[0006] In this technical solution, a boss body portion is provided, connected to the fin body portion via a first boss connecting portion. The distance h between the boss body portion and the fin body portion increases the thickness dimension of the fin, thereby improving the structural strength of the fin, reducing or even eliminating the risk of deformation such as bending and falling during production, handling, and assembly, and improving the heat exchanger's qualification rate. The boss body portion extends in the height direction, maximizing its area and significantly improving the strength of the fin.

[0007] In some embodiments, the end of the slot close to the first boss connection portion is the bottom of the slot;

[0008] Projected on the plate surface of the fin, the bottom of the slot and the first notch forming portion are both arc-shaped and the centers of the two coincide with each other; the central angle β of the first notch forming portion is ≤180°.

[0009] In the present technical solution, when β is within this range, it is beneficial for the condensation water on the heat exchanger to be discharged along the first notch forming portion; if β>180°, the first notch forming portion is in an arc shape, so that the bottom of the first notch forming portion forms a pit shape, and the condensation water on the heat exchanger will accumulate in the pit, and the drainage guiding performance of the first notch forming portion will be reduced.

[0010] In some embodiments, the fin also includes: a second boss connecting portion, connected between the boss body portion and the fin body portion and located at the end of the boss body portion away from the slot; the second boss connecting portion includes: a second notch forming portion, the space enclosed by the second notch forming portion forms a second notch; a second peak portion, extending along the height direction, and the second peak portion and the second notch forming portion are alternately arranged in the height direction.

[0011] In this technical solution, the second boss connecting portion is arranged in a form of alternating second peak portions and second notch forming portions, which can further improve the structural strength of the fin and reduce the deformation of the fin such as bending and lodging.

[0012] In some embodiments, the sum of the lengths of adjacent second peaks and second notch forming portions in the height direction is P1, the length of the second peak in the height direction is P2, and the center distance between two adjacent slots is Pt; P2 / P1≥0.5, P1≤Pt.

[0013] In the present technical solution, P1≤Pt, indicating that there is at least one second peak and at least one second notch forming portion within a range of Pt; by setting P1≤Pt, the lengths of the second peak and the second notch forming portion will not be too long, thereby achieving the effect of enhancing the structural strength through dense serrations.

[0014] In some embodiments, the first boss connection portion is set at an inclination angle γ relative to the fin body portion; 20°≤γ≤70°.

[0015] In this technical solution, if γ is too small, the dimension of the first notch forming portion in the width direction of the fin is large, which will shorten the dimension of the boss body in the width direction, thereby weakening the structural strength of the fin.

[0016] If γ is too large, the first notch forming portion is nearly perpendicular to the fin body, which blocks the air flow and is not conducive to the air flow passing through the first notch forming portion.

[0017] In some embodiments, the relationship between the thickness δ of the fin body and h satisfies: δ≤h≤10*δ.

[0018] In the present technical solution, if h<δ, the boss body protrudes from the fin body in the thickness direction to a smaller extent, and the contribution to the structural strength of the fin is relatively small.

[0019] If h is too large, the boss body protrudes from the fin body in the thickness direction to a greater extent, and the interval between the fin bodies of two adjacent fins is relatively large, which will affect the heat exchange efficiency of the heat exchanger.

[0020] In some embodiments, a support portion extending outward is provided on the boss body, and one end of the support portion away from the boss body is bent to form a folded portion, which abuts against the adjacent fins; in the direction away from the slot, the height Δ of the folded portion gradually decreases.

[0021] In some embodiments, a through opening is provided on the boss body, and support portions are respectively provided at the upper end and the lower end of the opening. The support portions extend outward relative to the boss body, and the support portions abut against adjacent fins.

[0022] On the other hand, the present application provides an air-conditioning outdoor unit, comprising: a shell provided with an air inlet; a heat exchanger provided in the shell corresponding to the air inlet, the heat exchanger comprising: a flat tube for circulating refrigerant; a fin, the fin comprising: a fin body portion provided with a plurality of fin connecting portions arranged at intervals along the height direction, the intervals between the fin connecting portions forming a slot for inserting the flat tube; a boss body portion having a distance h from the fin body portion in the thickness direction of the fin, the boss body portion extending in the height direction of the fin; a first boss connecting portion connected between the boss body portion and the fin body portion and located at one end of the boss body portion close to the slot, the first boss connecting portion comprising: a plurality of first notch forming portions, the space enclosed by the first notch forming portions forming a first notch, the first notch forming portion being arranged corresponding to the slot in the width direction of the fin; a first peak portion extending in the height direction, the first peak portion and the first notch forming portion being arranged alternately in the height direction.

[0023] In this technical solution, a boss body portion is provided, connected to the fin body portion via a first boss connecting portion. The distance h between the boss body portion and the fin body portion increases the thickness dimension of the fin, thereby improving the structural strength of the fin, reducing or even eliminating the risk of deformation such as bending and falling of the fin during production, handling, and assembly, and improving the qualification rate of the heat exchanger. The boss body portion extends in the height direction, maximizing the area of the boss body portion and significantly improving the strength of the fin. The first boss connecting portion is formed by alternating first peak portions and first notch-forming portions, further enhancing the strength of the fin.

[0024] In some embodiments, the intersection line of the arc side surface of the notch on the flat tube near the slot and the bottom surface of the flat tube is line z; the upper end of the fin connecting portion is provided with a first positioning flange portion extending outward, and the plane where the end surface of the notch of the first positioning flange portion near the slot is located is surface w; line z is located on surface w.

[0025] In this technical solution, the provision of the first positioning flange portion can prevent condensation water on the side of the flat tube from flowing toward the lower surface of the flat tube, thereby allowing the condensation water on the side of the flat tube to flow directly downward, thereby improving the drainage performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 shows a perspective view of an air conditioner according to some embodiments;

[0027] Figure 2 shows a cross-sectional view of an air conditioner according to some embodiments;

[0028] Figure 3 shows a partial schematic diagram of a heat exchanger of an air conditioner according to some embodiments;

[0029] Figure 4 shows a perspective view of a fin according to some embodiments;

[0030] Figure 5 shows a side view of a fin according to some embodiments;

[0031] Figure 6 A partial side view of a fin in the related art is shown;

[0032] Figure 7-Figure 9 shows a partial side view of a fin according to some embodiments;

[0033] Figure 10 Shown Figure 9 Partial cross-sectional view along AA line;

[0034] Figure 11 Shown Figure 9 Partial cross-sectional view along the BB axis;

[0035] Figure 12 shows a partial side view of a heat exchanger for an air conditioner according to some embodiments;

[0036] Figure 13 Side views of five fin types are shown;

[0037] Figure 14 Show Figure 13 The bar graph of the straightness deformation of the five fin types;

[0038] Figure 15 Show Figure 13 The bar graph of the lodging deformation of the five fin types;

[0039] In the above figures, 10, housing; 11, air inlet; 12, air outlet; 20, fan; 21, fan motor; 22, motor bracket; 30, heat exchanger; 31, flat tube; 31a, hole; 32, fin; 321, fin body; 321a, first end; 321b, second end; 3211, slot; 3212, fin connection portion; 3213, window portion; 3214, corrugated portion; 3215, first positioning flange portion; 3218, second positioning flange portion; 322, boss portion; 323, boss portion Table body portion; 3231, supporting portion; 3232, opening portion; 3233, first supporting portion; 3234, second supporting portion; 3235, supporting connecting portion; 3236, folding portion; 324, first boss connecting portion; 3241, first notch forming portion; 3242, first peak portion; 3243, first circular arc line; 3244, second circular arc line; 3245, first notch; 325, second boss connecting portion; 3251, second notch forming portion; 3252, second peak portion; 3253, second notch. DETAILED DESCRIPTION

[0040] In order to make the purpose and implementation of this application clearer, the exemplary implementation of this application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only part of the embodiments of this application, not all of the embodiments.

[0041] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat exchanged.

[0045] The compressor compresses low-temperature, low-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0046] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser to a lower-pressure liquid. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves cooling by utilizing the latent heat of evaporation to exchange heat with the material being cooled. Throughout this cycle, the air conditioner regulates the temperature of the indoor space.

[0047] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0048] The indoor heat exchanger and the outdoor heat exchanger 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.

[0049] The present application is introduced below using a top-outlet outdoor unit as an example. It can be understood that the present application is also applicable to a side-outlet outdoor unit.

[0050] Reference Figure 1 、 Figure 2 The air conditioner outdoor unit according to an embodiment of the present application includes a housing 10. The housing 10 is in the shape of a rectangular parallelepiped and generally defines the exterior of the air conditioner outdoor unit. The housing 10 may be formed by connecting multiple sheet metal pieces. The sheet metal pieces may be connected by fasteners such as screws or by welding.

[0051] The housing 10 includes an at least partially opened top surface, a bottom plate defining a bottom structure, and side plates whose bottom ends are connected to edges of the bottom plate.

[0052] The housing 10 includes an air inlet 11 through which outside air is introduced, and an air outlet 12 through which the air introduced through the air inlet 11 undergoes heat exchange and is then discharged to an outdoor space.

[0053] In this application, the side of the outdoor unit installed against the wall is defined as the rear side, and the side opposite to the rear side is the front side.

[0054] In some embodiments, the rear portion of the housing 10 is open to form a portion of the air inlet 11. Grille plates may be provided on the left and right sides and the front side of the housing 10, and the holes on the grille plates form another portion of the air inlet 11.

[0055] At least the opened portion of the top surface of the housing 10 forms an air outlet 12 .

[0056] The air introduced through the air inlet 11 on the side is discharged from the air outlet 12 on the top surface.

[0057] The air conditioner outdoor unit includes a fan 20 , which may be an axial flow fan that allows air to flow out in the axial direction.

[0058] The fan 20 may include a cylindrical hub and a plurality of blades arranged along the circumference of the hub. The axis of the fan 20 may be vertical.

[0059] The fan motor 21 is connected to one side of the fan 20. The fan motor 21 is driven to provide the fan 20 with a rotational force.

[0060] The fan motor 21 is fixed to the housing 10 via a motor bracket 22. For example, opposite ends of the motor bracket 22 may be fastened to the housing 10 via fasteners such as screws, and the fan motor 21 may be connected to the motor bracket 22 via fasteners such as screws, thereby achieving installation of the fan motor 21 within the housing 10.

[0061] The air conditioner outdoor unit includes a heat exchanger 30, which is arranged in the housing 10 corresponding to the air inlet 11 on the side of the housing 10. The heat exchanger 30 is used to perform heat exchange with the air introduced through the air inlet 11.

[0062] The heat exchanger 30 includes refrigerant tubes through which refrigerant flows, and fins 32 coupled to the refrigerant tubes in order to increase a heat exchange area.

[0063] Figure 2 The middle arrow indicates the air flow direction. When the outdoor unit is working, driven by the fan 20, outdoor air enters the housing 10 from the air inlet 11, exchanges heat with the heat exchanger 30, and is blown out from the air outlet 12.

[0064] Reference Figure 3 The heat exchanger 30 may be a microchannel heat exchanger, and the refrigerant tube is a flat tube 31 ; the fin 32 is connected to the flat tube 31 , and the heat exchange efficiency between the refrigerant and the air is improved by increasing the surface area of the flat tube 31 .

[0065] The flat tubes 31 are porous tubes with multiple holes 31a that form refrigerant flow paths. The refrigerant exchanges heat with the air as it flows through each hole 31a in the flat tubes 31. The holes 31a are arranged within the flat tubes 31 along the direction of air flow relative to the heat exchanger 30.

[0066] Reference Figure 4 and Figure 5 The fin 32 may be a slot-type fin. The fin 32 includes a fin body 321 , which is flat and has a first end 321 a and a second end 321 b opposite to each other. The distance between the first end 321 a and the second end 321 b is the width of the fin body 321 .

[0067] A plurality of slots 3211 are provided on the fin body 321 near the first end 321 a. The slots 3211 are arranged along the height direction of the fin 32. The flat tubes 31 are inserted into the slots 3211.

[0068] The slot 3211 penetrates the fin body 321 in the thickness direction and is open at the first end 321a of the fin body 321 to form a slot opening of the slot 3211. The end of the slot 3211 away from the slot opening is the bottom of the slot 3211. The bottom of the slot 3211 may be arc-shaped.

[0069] The fin body 321 is provided with a plurality of fin connection parts 3212 . The plurality of fin connection parts 3212 are arranged at intervals along the height direction of the fin 32 , and the intervals between the fin connection parts 3212 form slots 3211 .

[0070] The fin 32 includes a boss portion 322 . The boss portion 322 is formed by partially protruding from the fin body portion 321 . The boss portion 322 is provided near the second end 321 b of the fin body portion 321 and extends along the height direction of the fin 32 .

[0071] In the present application, a boss portion 322 extending in the height direction is provided on the fin 32, which can increase the size of the fin 32 in the thickness direction, thereby improving the structural strength of the fin 32, reducing or even avoiding the bending deformation and falling problems of the fin during production, transportation and assembly, and improving the qualification rate of the heat exchanger.

[0072] The boss portion 322 may be formed by stamping a portion of the fin body portion 321 close to the second end 321 a .

[0073] The boss portion 322 includes a boss body portion 323. The boss body portion 323 is in a flat plate shape, and a distance h is defined between the boss body portion 323 and the fin body portion 321.

[0074] The two transverse ends of the boss body 321 are connected to the fin body 321 through a first boss connecting portion 324 and a second boss connecting portion 325. The first boss connecting portion 324 is located at the end of the boss body 321 close to the slot 3211, and the second boss connecting portion 325 is located at the end of the boss body 321 away from the slot 3211.

[0075] The first boss connection portion 324 includes a plurality of first notch forming portions 3241. The first notch forming portions 3241 are arranged corresponding to the slots 3211 in the width direction.

[0076] In some embodiments, the first notch forming portion 3241 is arc-shaped, and the space enclosed by the first notch forming portion 3241 forms an arc-shaped first notch 3245 .

[0077] Reference Figure 6 In the prior art, when the first boss connection portion of the boss portion is formed by connecting the transverse ribs 326 and the longitudinal ribs 327, the transverse ribs 326 will block the condensation water on the heat exchanger 30 from flowing downward. However, in the present application, the first notch forming portion 3241 is arc-shaped, which can guide the condensation water to flow downward, thereby improving the drainage efficiency of the heat exchanger 30.

[0078] The portion of the first boss connecting portion 324 between the first notch forming portions 3241 is a first peak portion 3242 . The first peak portion 3242 extends in the height direction and is arranged in the width direction of the fin 32 corresponding to the fin connecting portion 3212 .

[0079] The first boss connection portion 324 includes first peak portions 3242 and first notch forming portions 3241 alternating along the height direction, wherein the first notch forming portion 3241 corresponds to the slot 3211 in the width direction, and the first peak portion 3242 corresponds to the fin connection portion 3212 in the width direction.

[0080] In some embodiments, the first boss connecting portion 324 is tilted relative to the fin body portion 321 (or the boss body portion 323 ), and the first boss connecting portion 324 tilts toward the second end 321 b of the fin 32 from the fin body portion 321 toward the boss body portion 323 .

[0081] Reference Figure 7 and Figure 8 , projected onto the plate surface of the fin body 321 , the first notch forming portion 3241 is arc-shaped, and the center of the first notch forming portion 3241 is located on the horizontal center line of its corresponding slot 3211 .

[0082] In some embodiments, the bottom of the slot 3211 is arc-shaped, and the center of the first notch forming portion 3241 can coincide with the center of the bottom of the slot 3211. In this way, the distance from the first notch forming portion 3241 to each part of the bottom of the slot 3211 is relatively uniform.

[0083] The contour line of the first notch forming portion 3241 includes a first arc line 3243 close to the slot 3211 and a second arc line 3244 away from the slot 3211 .

[0084] In some embodiments, the central angle β of the first arc line 3243 is ≤ 180°. When β is within this range, the lowest point of the first arc line 3243 is the endpoint of the first arc line 3243 , which facilitates the drainage of condensed water from the heat exchanger 30 along the first notch forming portion 3241 . If β is greater than 180°, the first arc line 3243 is a major arc, and the lowest point of the first arc line 3243 is not at its endpoint. In other words, the bottom of the first notch forming portion 3241 forms a pit, and condensed water from the heat exchanger 30 accumulates in the pit. The first notch forming portion 3241 hinders drainage, resulting in a decrease in the drainage performance of the heat exchanger 30 .

[0085] In some embodiments, reference Figure 9 and Figure 10 The radius of the first arc line 3243 is R1, the radius of the second arc line 3244 is R2, and it is assumed that the acute angle of inclination of the first notch forming portion 3241 relative to the fin body portion 321 is

[0086] If γ is too small, then under the condition of h being constant, the dimension of the first notch forming portion 3241 in the width direction of the fin is larger, that is, R2-R1 is larger, which will shorten the dimension of the boss body portion 323 in the width direction, thereby weakening the structural strength of the fin.

[0087] If γ is too large, the first notch forming portion 3241 and the fin body portion 321 are nearly perpendicular to each other, thereby blocking the air flow and hindering the air flow from passing through the first notch forming portion 3241 .

[0088] In some embodiments, δ≤h, where δ is the thickness of the fin body 321. If h<δ, the protrusion of the boss portion 322 in the thickness direction is small, and the contribution to the structural strength of the fin 32 is relatively small.

[0089] If h is too large, the protruding size of the boss portion 322 is relatively large, and the interval between two adjacent fins 32 and the fin body portion 321 is relatively large, which will affect the heat exchange efficiency of the heat exchanger 30.

[0090] δ≤h≤10*δ, and the strength of the fins 32 is effectively enhanced without affecting the heat exchange efficiency of the heat exchanger 30.

[0091] In some embodiments, a flange is provided at the edge of the slot 3211. The outer diameter of the slot bottom at the flange is R0.

[0092] Assuming that the center of the circle J coincides with the center of the first notch forming portion 3241 , the radius of the circle J is R3 = R1 + ( R2 − R1 ) / 2.

[0093] R3 and R0 satisfy: R3-R0≥1mm. Since the flanges of the first notch forming portion 3241 and the slot 3211 are formed by stamping and stretching the fin body 321, R3-R0≥1mm can avoid the problem of "grabbing material" during stretching and ensure molding quality.

[0094] In some embodiments, continue to refer to Figure 7 and Figure 8 The second boss connecting portion 325 includes a plurality of second notch forming portions 3251. The spaces enclosed by the second notch forming portions 3251 form second notches 3253.

[0095] The portion of the second boss connecting portion 325 connected between the second notch forming portions 3251 is a second peak portion 3252. The second peak portion 3252 extends in the height direction.

[0096] The second boss connecting portion 325 includes second peak portions 3252 and second notch forming portions 3251 that alternate along the height direction.

[0097] In some embodiments, the second boss connecting portion 325 is tilted relative to the fin body 321 (or boss body 323 ), and is tilted away from the second end 321 b of the fin 32 from the fin body 321 toward the boss body 323 .

[0098] Projected onto the plate surface of the fin body 321 , the inner contour of the second notch forming portion 3251 forms an isosceles trapezoidal notch shape.

[0099] In some embodiments, the length of the adjacent second peak portion 3252 and the second notch forming portion 3251 in the height direction is P1, and the length of the second peak portion 3252 in the height direction is P2; P2 / P1≥0.5.

[0100] P2 / P1≥0.5 indicates that the length of the second peak portion 3252 is not less than the length of the second notch forming portion 3251. The longer the second peak portion 3252 is, the more protruding parts on the second boss connecting portion 325 are, which is beneficial to enhancing the structural strength.

[0101] The center-to-center distance between two adjacent slots 3211 is Pt, where P1 ≤ Pt. This indicates that within the range of Pt, there is at least one second peak 3252 and at least one second notch-forming portion 3251. By setting P1 ≤ Pt, the lengths of the second peaks 3252 and second notch-forming portions 3251 are kept short, thereby enhancing structural strength through the dense serrations.

[0102] In some embodiments, reference Figure 4 The boss body 323 is provided with an outwardly extending support portion 3231, which abuts against adjacent fins 32 to define the distance between the two fins 32. When two fins 32 are combined together, the support portion 3231 creates a gap between the two fins 32, thereby enabling air circulation between the fins 32 and ensuring efficient heat dissipation between the fins 32.

[0103] Combine Figure 4 、 Figure 9 and Figure 11 The support portion 3231 includes a support connection portion 3235 connected to the boss body portion 323. The support connection portion 3235 can be formed by cutting and bending a portion of the boss body portion 323.

[0104] One end of the supporting connecting portion 3235 away from the boss body portion 323 is vertically bent to form a folded portion 3236. The folded portion 3236 can increase the contact area between the supporting portion 3231 and the adjacent fin 32.

[0105] In some embodiments, the boss body 323 is provided with an opening 3232 extending through the thickness direction. The upper and lower ends of the opening 3232 are connected to support portions 3231 respectively.

[0106] The support portion 3231 at the upper end of the opening 3232 is a first support portion 3233 , and the support portion 3231 at the lower end of the opening 3232 is a second support portion 3234 .

[0107] The folding portion 3236 of the first supporting portion 3233 is bent upward, and the folding portion 3236 of the second supporting portion 3234 is bent downward.

[0108] Compared with the prior art in which only one support portion 3231 is provided at the opening portion 3232, which causes uneven spacing between the fins 32 due to the small support area, the present application provides two support portions 3231 at one opening portion 3232, which can increase the contact area between the support portion 3231 and the adjacent fins 32, thereby ensuring that the spacing between the two fins 32 is relatively uniform.

[0109] According to an embodiment of the present application, the opening portion 3232 and the first peak portion 3242 are arranged correspondingly in the horizontal direction.

[0110] From the first end 321a of the fin body 321 to the second end 322b of the fin body 321 (the direction away from the slot 3211), the vertical height Δ of the folded portion 3236 gradually decreases, so that Figure 4 The area of the right side of the middle folding portion 3236 is relatively large, and the area of the left side is relatively small.

[0111] Since the area of the left side portion of the support portion 3231 of the fin 32 is relatively small, the smaller area on the left side of the folded portion 3236 can separate the left side portions of the two fins 32 and reduce the obstruction to the airflow.

[0112] The area of the right side portion of the fin 32 located at the support portion 3231 is relatively large, so the right side area of the folded portion 3236 is relatively large, which can better keep the right side portions of adjacent fins 32 spaced apart.

[0113] In some embodiments, the vertical height Δ of the folded portion 3236 satisfies: Δ ≥ 0.3 mm. If Δ is too small, the contact area between the folded portion 3236 and the adjacent fin 32 will be too small, which will affect the supporting function of the supporting portion 3231.

[0114] The vertical height Δ of the folded portion 3236 satisfies: Δ≤Pt / 2-Fp, where Pt is the vertical center distance between adjacent slots, and Fp is the distance between adjacent fins 32.

[0115] For example, if Pt=13.5 mm and Fp=1.7 mm, then Δ≤5.05 mm, which is the maximum height that can be processed.

[0116] In some embodiments, reference Figure 4 The fin connection portion 3212 is provided with a window portion 3213 and / or a corrugated portion 3214. The window portion 3213 and the corrugated portion 3214 enable air circulation between the fins 32. When multiple fins are stacked, the window portion 3213 and the corrugated portion 3214 can be fully utilized for overall heat dissipation, thereby improving heat dissipation efficiency.

[0117] In some embodiments, reference Figure 4 、 Figure 12 The upper end of the fin connection part 3212 is provided with a first positioning flange part 3215, which is formed by extending the upper end of the fin connection part 3212 outward from the plate surface. The upper surface of the first positioning flange part 3215 can be flush with the lower groove surface of the slot 3211.

[0118] The connecting line between the arc side surface and the bottom surface of the flat tube 31 near the first end 321a is line z, and the plane where the end surface of the first positioning flange portion 3215 near the first end 321a is located is surface w, and line z is on surface w.

[0119] Reference Figure 12 If there is no first positioning flange portion 3215, the condensation water on the upper surface of the flat tube 31 will flow along the arc side of the flat tube 31 to the bottom surface of the flat tube 31. The setting of the first positioning flange portion 3215 can prevent the condensation water on the side of the flat tube 31 from flowing toward the lower surface of the flat tube 31, thereby allowing the condensation water on the side of the flat tube 31 to flow directly downward, thereby improving the drainage performance of the heat exchanger 30.

[0120] In other embodiments, the first positioning flange portion 3215 is spaced apart from the line z.

[0121] Reference Figure 4 and Figure 12 The lower end of the fin connection portion 3212 may be provided with a second positioning flange portion 3218, which is formed by extending the lower end portion of the fin connection portion 3212 outward from the plate surface. The lower surface of the second positioning flange portion 3218 may be flush with the upper groove surface of the slot 3211.

[0122] In the width direction of the fin 32 , a left end of the first positioning flange portion 3215 and a left end of the second positioning flange portion 3218 are spaced apart from each other.

[0123] The first positioning flange 3215 and the second positioning flange 3218 can have the same function as the support portion 3231: the first positioning flange 3215 and the second positioning flange 3218 can abut against adjacent fins 32 to define the spacing between the two fins 32. When two fins 32 are combined, the first positioning flange 3215 and the second positioning flange 3218 ensure a spacing between the two fins 32.

[0124] This application verifies the fin strength by comparing the deformation:

[0125] Reference Figure 13 There is no boss portion on fin ①; the left and right ends of the boss portion on fin ② are connected to the fin body through a vertically extending structure; fin ③ is equivalent to setting a first boss connection portion 324 on the basis of fin ②; fin ④ is equivalent to setting a second boss connection portion 325 on the basis of fin ③; fin ⑤ is equivalent to setting a support portion 3231 on the basis of fin ④.

[0126] The fin is placed horizontally, and the first end 321a or the second end 322b of the fin is fixed, so that the fin deforms under its own weight, and the straightness deformation of the fin can be obtained. The first end 321d of the fin is positioned, and a bending load pressure is applied to the second end 321b of the fin to obtain the lodging deformation of the fin.

[0127] Figure 14 is the straightness deformation data from fin ① to fin ⑤, Figure 15 This is the lodging deformation data from fin ① to fin ⑤.

[0128] from Figure 14 and Figure 15 It can be seen that the deformation of fin ③ is greatly reduced relative to that of fin ②. It can be seen that the first boss connecting portion 324 with the first peak portion 3243 and the first notch forming portion 3251 alternately distributed on the boss portion 322 can improve the strength of the fin and reduce the bending and lodging deformation of the fin.

[0129] The deformation of fin ④ is greatly reduced compared with that of fin ③. It can be seen that the second boss connecting portion 325 with the second notch forming portion 3251 and the second peak portion 3252 alternately distributed on the boss portion 322 can further improve the strength of the fin and reduce the bending and lodging deformation of the fin.

[0130] The deformation of fin ⑤ is slightly smaller than that of fin ④. Therefore, the support portion 3231 is provided on the boss body portion 323 to slightly improve the strength of the fin.

[0131] As can be seen from the above, according to the embodiment of the present application, a boss portion 322 extending in the height direction is provided on the fin 32, so that the size of the fin 32 in the thickness direction can be increased, thereby improving the structural strength of the fin 32, reducing or even avoiding the risk of deformation such as bending and falling of the fin during production, transportation and assembly, and improving the qualification rate of the heat exchanger.

[0132] In addition, the boss portion 322 includes a first boss connecting portion 324 connecting the boss body portion 323 and the fin body portion 321. The first boss connecting portion 324 is formed by alternatingly connecting the first notch forming portion 3241 and the first peak portion 3242, which can further increase the structural strength of the fin 32 and reduce the deformation of the fin 32 such as bending and falling.

[0133] In addition, compared with the prior art in which the first boss connection portion of the boss part is connected by a horizontal rib 326 and a longitudinal rib 327, in which the horizontal rib 326 will block the condensation water on the heat exchanger 30 from flowing downward, the first notch forming portion 3241 in this application is arc-shaped, which can guide the condensation water to flow downward, thereby improving the drainage efficiency on the heat exchanger 30.

[0134] In addition, the central angle β of the first arc line 3243 at the first notch forming portion 3241 is ≤180°, which makes the area of the boss portion 322 as large as possible without affecting the drainage of the heat exchanger 30, thereby further increasing the structural strength of the fin 32.

[0135] In addition, the boss portion 322 includes a second boss connecting portion 324 connecting the boss body portion 323 and the fin body portion 321. The second boss connecting portion 324 is formed by alternatingly connecting the second notch forming portion 3241 and the second peak portion 3252, which can further increase the structural strength of the fin 32 and reduce the deformation of the fin 32 such as bending and falling.

[0136] In addition, compared with the prior art in which only one support portion 3231 is provided at the opening portion 3232, which causes uneven spacing between the fins 32 due to the small support area, in this application, two support portions 3231 are provided at one opening portion 3232, which can increase the contact area between the support portion 3231 and the adjacent fins 32, thereby ensuring that the spacing between the two fins 32 is relatively uniform.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. 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 application.

[0138] 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 is provided; A heat exchanger is provided in the housing corresponding to the air inlet, and the heat exchanger includes: Flat tubes, used to circulate refrigerant; The fin is connected to the flat tube, and the fin includes: The fin body is provided with a slot for inserting the flat tube; a boss body portion, having a distance h from the fin body portion in the thickness direction of the fin, and the boss body portion extending along the height direction of the fin; The first boss connecting portion is connected between the boss body portion and the fin body portion and is located at one end of the boss body portion close to the slot. The first boss connecting portion has a first notch forming portion that forms a first notch. The first notch forming portion is arranged corresponding to the slot in the width direction of the fin.

2. The air conditioner outdoor unit according to claim 1, characterized in that: One end of the slot close to the first boss connection portion is the slot bottom; Projected on the plate surface of the fin, the bottom of the slot and the first notch forming portion are both arc-shaped and the centers of the two coincide with each other; the central angle β of the first notch forming portion is ≤180°.

3. The air conditioner outdoor unit according to claim 1 or 2, characterized in that: The fin further comprises: The second boss connecting portion is connected between the boss body portion and the fin body portion and is located at an end of the boss body portion away from the slot; the second boss connecting portion includes: a second notch forming portion, wherein the space enclosed by the second notch forming portion forms a second notch; The second peak portion extends along the height direction, and the second peak portion and the second notch forming portion are alternately distributed in the height direction.

4. The air conditioner outdoor unit according to claim 3, characterized in that: The sum of the lengths of the adjacent second peaks and the second notch forming portions in the height direction is P1, the length of the second peaks in the height direction is P2, and the center distance between two adjacent slots is Pt; P1≤Pt.

5. The air conditioner outdoor unit according to claim 1, characterized in that: The first boss connection portion is arranged at an inclination angle γ relative to the fin body portion; 20°≤γ≤70°.

6. The air conditioner outdoor unit according to claim 1, characterized in that: The relationship between the thickness δ of the fin body and h satisfies: δ≤h≤10*δ.

7. The air conditioner outdoor unit according to claim 1, characterized in that: The boss body is provided with a support portion extending outward, and one end of the support portion away from the boss body is bent to form a folded portion, and the folded portion abuts against the adjacent fin; In a direction away from the slot, a height Δ of the folded portion gradually decreases.

8. The air conditioner outdoor unit according to claim 1, characterized in that: The boss body is provided with a penetrating opening, and the upper end and the lower end of the opening are respectively provided with supporting parts, which extend outward relative to the boss body and abut against adjacent fins.

9. An air conditioner outdoor unit, characterized in that: include: a housing, on which an air inlet is provided; A heat exchanger is provided in the housing corresponding to the air inlet, and the heat exchanger includes: Flat tubes, used to circulate refrigerant; The fin comprises: The fin body is provided with a plurality of fin connecting parts spaced apart in the height direction, wherein the intervals between the fin connecting parts form slots for inserting the flat tubes; a boss body portion, having a distance h from the fin body portion in the thickness direction of the fin, and the boss body portion extending along the height direction of the fin; A first boss connecting portion is connected between the boss body portion and the fin body portion and is located at one end of the boss body portion close to the slot, and the first boss connecting portion includes: a plurality of first notch forming portions, wherein a space enclosed by the first notch forming portions forms a first notch, and the first notch forming portions are arranged in a width direction of the fin corresponding to the slot; The first peak portion extends along the height direction, and the first peak portion and the first notch forming portion are alternately arranged in the height direction.

10. The air conditioner outdoor unit according to claim 9, characterized in that: The connecting line between the arc side surface of the notch on the flat tube close to the slot and the bottom surface of the flat tube is line z; The upper end of the fin connection portion is provided with a first positioning flange portion extending outward, and the plane where the end surface of the first positioning flange portion close to the notch of the slot is located is plane w; Line z lies on surface w.

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