Air conditioner outdoor unit

Abstract

A fan is arranged in a machine shell of the air conditioner outdoor unit, an air outlet grating is arranged at a ventilation hole of the machine shell, the air outlet grating comprises an annular frame, supporting ribs, outer circumferential ribs and inner circumferential ribs, the annular frame is arranged at the ventilation hole, and the multiple supporting ribs are arranged in the circumferential direction of the annular frame at intervals; the multiple outer circumferential ribs and the multiple inner circumferential ribs are distributed on the inner side of the annular frame at intervals, the multiple outer circumferential ribs are arranged on the air outlet side of the supporting ribs, the multiple inner circumferential ribs are arranged on the air inlet side of the supporting ribs, and the multiple inner circumferential ribs are arranged in the direction, away from the annular frame, of the supporting ribs. The air outlet sides of the multiple outer circumferential ribs are gradually changed from inclining towards the direction close to the annular frame to inclining towards the direction away from the annular frame, and the air inlet sides of the multiple inner circumferential ribs are gradually changed from inclining towards the direction away from the annular frame to inclining towards the direction close to the annular frame. According to the improved air outlet grille, the resistance to air blown out by a fan of the air conditioner outdoor unit can be reduced, and the air outlet distance is increased.

Description

Technical Field

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

[0002] The air conditioner mainly includes an outdoor unit and an indoor unit. An air outlet grille is provided at the air outlet of the outdoor unit. The air outlet grille is mainly used to prevent external debris from entering the outdoor unit and affecting the normal operation of the outdoor unit, and to prevent people from touching the fan in the outdoor unit and causing safety accidents. At the same time, the wind generated by the fan in the outdoor unit needs to pass through the air outlet grille to reach the outdoors.

[0003] In the side-outlet air conditioner outdoor unit, the model tends to be miniaturized. As the frame is reduced, the area of ​​the outdoor heat exchanger is also reduced. In order to ensure the cooling and heating capacity, the required air volume is increased, and the average wind speed through the outdoor heat exchanger and the air outlet grille is increased, resulting in an increase in the resistance of the outdoor heat exchanger and the air outlet grille, which greatly increases the air outlet resistance of the whole machine and is not conducive to noise optimization. Therefore, it is very important to design the air outlet resistance reduction for the whole machine. Among the air outlet resistance of the whole machine, the resistance of the outdoor heat exchanger and the air outlet grille accounts for the majority, among which the air outlet grille resistance of different models accounts for about 10-30% of the total resistance of the whole machine, so it is very necessary to optimize the air outlet grille.

[0004] At present, the air outlet grilles of side-exhaust outdoor units all have single-row ribs, and it is difficult to improve the flow separation caused by the rotation of the axial fan outlet through the air outlet grille structure. The airflow downstream of the axial fan will produce serious flow separation when passing through the air outlet grille, and an obvious low-speed zone will be generated near the air outlet grille, resulting in increased aerodynamic resistance of the air outlet grille. On the other hand, a large number of vortices will be generated after the airflow passes through the ribs of the air outlet grille, thereby generating a low-speed zone, increasing the turbulent kinetic energy at the air outlet grille and significantly increasing the aerodynamic noise.

[0005] In addition, the main materials of the air outlet grille are plastic and iron wire. The iron wire mesh grille is expensive, so in order to reduce costs, the models with large sales have a high proportion of plastic grilles. However, for the feasibility of production, the parameters of the plastic grille such as rib height and rib length are limited, which leads to higher resistance of the plastic grille. The resistance of the whole machine increases. When the required air volume is the same, the fan speed increases, the fan output power increases, and the corresponding motor power and motor cost increase; the fan speed increases, and the noise of the whole machine becomes worse.

[0006] In addition, the installation environment of the air-conditioning outdoor unit is generally in the equipment room or in the building groove. If the air supply distance is short, when the indoor cooling is performed in the hot summer, it will cause the return air short circuit, that is, the hot air cannot be blown out and circulates near the air conditioner. In severe cases, the air conditioner will shut down due to the high ambient temperature, so it is also necessary to improve the air supply distance.

[0007] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0008] In view of the problems pointed out in the background technology, the present invention provides an air conditioner outdoor unit, which reduces the resistance of the air outlet grille to the wind blown out by the fan of the air conditioner outdoor unit, suppresses the influence of the grille ribs on the internal flow field of the air conditioner, and increases the air outlet distance.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0010] In some embodiments of the present application, an air conditioner outdoor unit is provided, comprising:

[0011] A housing is formed with a receiving cavity inside, and a ventilation hole is opened on the side wall of the housing;

[0012] A fan is disposed in the accommodating cavity, and the ventilation hole is located at the air outlet side of the fan;

[0013] The air outlet grille comprises:

[0014] An annular frame, which is arranged at the ventilation hole and fixed on the housing;

[0015] A plurality of supporting ribs are arranged at intervals along the circumference of the annular frame, wherein a first end of the supporting rib is connected to the annular frame and a second end is located inside the annular frame;

[0016] A plurality of outer circumferential ribs are spaced and distributed on the inner side of the annular frame, the plurality of outer circumferential ribs are cross-connected with the support ribs and are arranged on the air outlet side of the support ribs, and along the direction in which the support ribs are away from the annular frame, the air outlet side of the plurality of outer circumferential ribs gradually changes from being inclined in a direction close to the annular frame to being inclined in a direction away from the annular frame;

[0017] A plurality of inner circumferential ribs are spaced and distributed on the inner side of the annular frame, the plurality of inner circumferential ribs are cross-connected with the support ribs and are arranged on the air inlet side of the support ribs, and along the direction in which the support ribs are away from the annular frame, the air inlet side of the plurality of inner circumferential ribs gradually changes from being inclined in a direction away from the annular frame to being inclined in a direction close to the annular frame;

[0018] The plurality of outer circumferential ribs and the plurality of inner circumferential ribs are distributed in a one-to-one correspondence along the air outlet direction.

[0019] The air outlet grille has two layers of inner and outer circumferential ribs, a plurality of outer circumferential ribs are arranged on the air outlet side of the supporting ribs, and the plurality of outer circumferential ribs constitute the outer layer of ribs of the air outlet grille, and a plurality of inner circumferential ribs are arranged on the air inlet side of the supporting ribs, and the plurality of inner circumferential ribs constitute the inner layer of ribs of the air outlet grille, forming a grille structure in the form of serial ribs. The outer circumferential ribs and inner circumferential ribs arranged in the inner and outer layers can effectively improve flow separation, reduce the influence of the ribs on the flow field, reduce the low-speed zone downstream of the ribs, improve the vortex situation downstream of the ribs, and improve noise.

[0020] In some embodiments, along the direction of the supporting ribs away from the annular frame, the plurality of outer circumferential ribs and the plurality of inner circumferential ribs form a first rib area, a second rib area, and a third rib area;

[0021] The air outlet sides of the plurality of outer circumferential ribs located in the first rib area are inclined toward the direction close to the annular frame, and the air inlet sides of the plurality of inner circumferential ribs are inclined toward the direction away from the annular frame;

[0022] The plurality of outer circumferential ribs and the plurality of inner circumferential ribs located in the second rib area are perpendicular to the supporting ribs;

[0023] The air outlet sides of the plurality of outer circumferential ribs located in the third rib area are inclined toward a direction away from the annular frame, and the air inlet sides of the plurality of inner circumferential ribs are inclined toward a direction close to the annular frame.

[0024] In some embodiments, in the first rib region, along the direction in which the support rib is away from the annular frame, the angle θ of the air inlet side of the plurality of inner circumferential ribs rotated counterclockwise relative to the support rib is 1 The angle θ of the air outlet side of the plurality of the outer circumferential ribs rotating counterclockwise relative to the supporting ribs is gradually reduced. 2 Gradually decrease.

[0025] In some embodiments, among the inner circumferential ribs and the outer circumferential ribs arranged one by one along the air outlet direction, θ 1 =2θ 2 .

[0026] In some embodiments, in the third rib region, along the direction in which the support rib is away from the annular frame, the angle θ of the wind inlet side of the plurality of inner circumferential ribs rotated clockwise relative to the support rib is 3 The angle θ of the air outlet side of the plurality of the outer circumferential ribs rotating clockwise relative to the support ribs gradually increases. 4 Gradually increase.

[0027] In some embodiments, among the inner circumferential ribs and the outer circumferential ribs arranged one by one along the air outlet direction, θ 3 =2θ 4 .

[0028] In some embodiments, the chord length of the inner circumferential rib and the outer circumferential rib is L, and L gradually decreases in the direction in which the supporting rib is away from the annular frame;

[0029] Among the inner circumferential ribs and the outer circumferential ribs arranged one by one in the air outlet direction, the distance between the air outlet side of the inner circumferential rib and the air inlet side of the outer circumferential rib in the radial direction of the air outlet grille is L1, and the distance along the air outlet direction is L2;

[0030] In the first rib area and the third rib area, along the direction in which the supporting ribs are away from the annular frame, L1 and L2 gradually decrease;

[0031] In the second rib area, L1=0, and L2 gradually decreases along the direction in which the supporting rib moves away from the annular frame.

[0032] In some embodiments, L2 = (0.05-0.15) × L, L1 = (0.01-0.2) × L.

[0033] In some embodiments, the cross-sections of the inner circumferential ribs and the outer circumferential ribs are airfoil-shaped.

[0034] The present invention also provides an air conditioner outdoor unit, comprising:

[0035] A housing is formed with a receiving cavity inside, and a ventilation hole is opened on the side wall of the housing;

[0036] A fan is disposed in the accommodating cavity, and the ventilation hole is located at the air outlet side of the fan;

[0037] The air outlet grille comprises:

[0038] An annular frame, which is arranged at the ventilation hole and fixed on the housing;

[0039] A plurality of supporting ribs are arranged at intervals along the circumference of the annular frame, wherein a first end of the supporting rib is connected to the annular frame and a second end is located inside the annular frame;

[0040] A plurality of outer circumferential ribs are spaced apart and distributed on the inner side of the annular frame, the plurality of outer circumferential ribs are cross-connected with the supporting ribs and are arranged on the air outlet side of the supporting ribs;

[0041] A plurality of inner circumferential ribs are spaced apart and distributed on the inner side of the annular frame, wherein the plurality of inner circumferential ribs are cross-connected with the supporting ribs and are arranged on the air inlet side of the supporting ribs;

[0042] The plurality of outer circumferential ribs and the plurality of inner circumferential ribs are distributed one-to-one in the wind outlet direction, an outer wind gap is formed between two adjacent outer circumferential ribs, an inner wind gap is formed between two adjacent inner circumferential ribs, and the plurality of outer wind gaps and the plurality of inner wind gaps are connected one-to-one in the wind outlet direction.

[0043] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 is a schematic structural diagram of an air-conditioning outdoor unit according to an embodiment;

[0046] Figure 2 is one of the structural schematic diagrams of the air outlet grille according to the embodiment;

[0047] Figure 3 for Figure 2 A front view of the air outlet grille is shown;

[0048] Figure 4 for Figure 3 Middle AA section view;

[0049] Figure 5 for Figure 4 Enlarged view of the M in the middle;

[0050] Figure 6 for Figure 5 Enlarged view of N1 in the middle;

[0051] Figure 7 is a schematic diagram of the rotation angles of the inner and outer circumferential ribs and the inner circumferential ribs relative to the supporting ribs in the first rib region according to an embodiment;

[0052] Figure 8 is a schematic diagram of a pair of outer circumferential ribs and inner circumferential ribs arranged opposite to each other in the first rib region according to an embodiment;

[0053] Fig. 9 for Figure 5Enlarged view of N2 in the middle;

[0054] Fig.10 for Figure 5 Enlarged view of N3 in the middle;

[0055] Fig.11 is a schematic diagram of the rotation angles of the inner and outer circumferential ribs and the inner circumferential ribs relative to the supporting ribs in the third rib region according to an embodiment;

[0056] Fig.12 This is a simulation effect diagram of the wind resistance of the prior art air outlet grille before optimization;

[0057] Fig.13 The figure is a simulation effect diagram of the wind resistance of the air outlet grille after optimization according to the embodiment (the circumferential ribs are not airfoil);

[0058] Fig.14 This is a simulation effect diagram of wind resistance after the air outlet grille is optimized according to the embodiment (the circumferential ribs are airfoil-shaped);

[0059] Fig.15 A simulation effect diagram of optimizing the front air supply distance of the existing air outlet grille;

[0060] Fig.16 This is a rendering of the air supply distance after the air outlet grille is optimized according to the embodiment;

[0061] Fig.17 The performance comparison of various types of air outlet grilles of the outdoor unit according to the embodiment under different working conditions;

[0062] Fig.18 This is the second structural schematic diagram of the air outlet grille in the embodiment of the present application;

[0063] Fig.19 This is one of the cross-sectional schematic diagrams of the air outlet grille in the embodiment of the present application;

[0064] Fig. 20 for Fig.19 A schematic diagram of the structure enlargement in the middle;

[0065] Fig.21 This is the third structural schematic diagram of the air outlet grille in the embodiment of the present application;

[0066] Fig. 22 This is the fourth structural diagram of the air outlet grille in the embodiment of the present application;

[0067] Fig.23 This is the fifth structural diagram of the air outlet grille in the embodiment of the present application;

[0068] Fig.24 This is one of the partial structural schematic diagrams of the air outlet grille in the embodiment of the present application;

[0069] Fig.25 for Fig.19 A magnified schematic diagram of the structure at B in the middle;

[0070] Fig.26 It is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille when the radial dimension of the fourth circumferential rib is not adjusted in the embodiment of the present application;

[0071] Fig. 27 It is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille after the radial dimension of the fourth circumferential rib in the embodiment of the present application is adjusted;

[0072] Fig.28 It is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille when the radial dimension of the sixth circumferential rib is not adjusted in the embodiment of the present application;

[0073] Fig.29 This is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille after the radial size of the sixth circumferential rib in the embodiment of the present application is adjusted;

[0074] Fig.30 This is a second cross-sectional schematic diagram of the air outlet grille in the embodiment of the present application;

[0075] Fig.31 for Fig.30 A magnified schematic diagram of the structure at D in the middle;

[0076] Fig.32 This is the second schematic diagram of the partial structure of the air outlet grille in the embodiment of the present application;

[0077] Fig.33 It is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille when no through hole is provided on the outer side wall of the annular frame in the embodiment of the present application;

[0078] Fig.34 It is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille after a through hole is opened on the outer side wall of the annular frame in the embodiment of the present application;

[0079] Fig.35 It is a cross-sectional schematic diagram of an air conditioner outdoor unit in an embodiment of the present application;

[0080] Fig.36 This is a graph showing the influence of the ratio of the third size to the fifth size on the air volume at the same speed in the embodiment of the present application;

[0081] Fig.37 for Fig.35 Enlarged schematic diagram of the structure at point E in the middle.

[0082] Reference numerals:

[0083] 1-housing; 11-accommodating cavity; 12-ventilation hole; 13-panel; 131-first plate body; 132-second plate body; 133-third plate body;

[0084] 2- fan; 21- motor; 22- fan blade;

[0085] 3-air outlet grille; 31-annular frame; 311-through hole; 32-support ribs; 321-first support ribs; 322-second support ribs; 323-first ribs; 324-second ribs; 325-air guide surface; 3251-first side edge; 3252-second side edge; 33-circumferential ribs; 331-arc ribs; 332-circular ribs; 333-first circumferential ribs; 33 31-first arc segment; 334-second circumferential rib; 3341-second arc segment; 335-third circumferential rib; 336-fourth circumferential rib; 337-fifth circumferential rib; 338-sixth circumferential rib; 34-center fixing plate; 35-partitioning rib; 36-outer circumferential rib; 361-outlet side of outer circumferential rib; 37-inner circumferential rib; 371-outlet side of inner circumferential rib;

[0086] 4- air guide ring; 41- first part; 42- second part;

[0087] H1-first size; H2-second size; H3-third size; H4-fourth size; H5-fifth size; L-first distance;

[0088] N1-first rib area; N2-second rib area; N3-third rib area. DETAILED DESCRIPTION

[0089] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0090] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0091] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0092] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0094] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0095] As a common household appliance, air conditioners are widely used in daily life. Air conditioners include outdoor units and indoor units. The indoor air temperature can be regulated through the cooperation between the outdoor unit and the indoor unit.

[0096] Specifically, when the air conditioner is cooling, the compressor in the outdoor unit compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant passes through the heat exchanger of the outdoor unit to dissipate heat and become a normal-temperature and high-pressure liquid refrigerant. The normal-temperature and high-pressure liquid refrigerant then enters the indoor unit, and the normal-temperature and high-pressure liquid refrigerant passes through the heat exchanger of the indoor unit to absorb a large amount of heat, and the air temperature in the inner cavity of the indoor unit will decrease. The fan of the indoor unit then outputs the low-temperature air through the grille, thereby cooling the indoor air. When the air conditioner is heating, the compressor in the outdoor unit compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the heat exchanger of the indoor unit to condense and liquefy into a normal-temperature and high-pressure liquid refrigerant, and releases a large amount of heat, and the air temperature in the inner cavity of the indoor unit will increase, and the fan of the indoor unit then outputs the high-temperature air through the grille, thereby increasing the temperature of the indoor air. The liquid refrigerant at room temperature and high pressure is decompressed by the throttling device and enters the heat exchanger of the outdoor unit. The liquid refrigerant at room temperature and high pressure evaporates and absorbs heat to become a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the compressor in the outdoor unit to start the next cycle.

[0097] During the operation of the air conditioner, the outdoor unit delivers the air blown out by the fan to the outdoor air through the air outlet grille. The air outlet grille can prevent external debris from entering the outdoor unit and affecting the normal operation of the outdoor unit, and can also prevent hands from contacting the fan inside the outdoor unit, thereby improving the safety performance of the outdoor unit. However, the grille will also create resistance to the air blown out by the fan of the outdoor unit, causing a loss in the air volume of the outdoor unit, affecting the overall performance of the outdoor unit.

[0098] The present application provides an air conditioner outdoor unit, which optimizes and improves the air outlet grille 3, reduces the resistance of the air outlet grille to the wind blown out by the fan of the air conditioner outdoor unit, suppresses the influence of the grille ribs on the internal flow field of the air conditioner, and increases the air outlet distance.

[0099] Specifically, refer to Figure 1 The air conditioner outdoor unit includes a casing 1, a fan 2 and an air outlet grille 3. A receiving cavity 11 is formed inside the casing 1. The fan 2 is located in the receiving cavity 11. A ventilation hole 12 is opened on the side wall of the casing 1. The ventilation hole 12 is located on the air outlet side of the fan 2.

[0100] The fan 2 is used to discharge the relatively high temperature gas in the casing 1 to the outside of the casing 1 through the ventilation holes 12 , so as to dissipate heat and cool the accommodating cavity 11 of the casing 1 .

[0101] The fan 2 includes a motor 21 and blades 22. The motor 21 is connected to the casing 1, and the blades 22 are connected to the motor 21. The blades 22 are opposite to the ventilation holes 12. The motor 21 can drive the blades 22 to rotate, so that the blades 22 drive tiny particles (various gas molecules, dust, etc.) in the air to move quickly, thereby forming wind.

[0102] The air on the side of the fan blade 22 close to the ventilation hole 12 is continuously sent away, which will form a low-pressure area on the side of the fan blade 22 close to the ventilation hole 12, that is, the air pressure on the side of the fan close to the ventilation hole 12 is lower than the air pressure on the side of the fan away from the ventilation hole 12, so that the air on the side of the fan blade 22 away from the ventilation hole 12 will continuously flow to the side of the fan blade 22 close to the ventilation hole 12, thereby forming a continuous source of wind.

[0103] As the fan rotates continuously, a continuous flow of wind will flow toward the ventilation holes 12 , and then be discharged to the outside of the housing 1 after passing through the ventilation holes 12 .

[0104] The air outlet grille 3 is disposed at the vent hole 12 and fixed to the housing 1 to protect the fan 2 and improve the safety performance of the air conditioner outdoor unit. The wind will flow through the air outlet grille 3 when it flows through the vent hole 12 and is discharged outside the housing 1.

[0105] Reference Figures 2 to 5 The air outlet grille 3 includes an annular frame 31 , a plurality of supporting ribs 32 , a plurality of outer circumferential ribs 36 , a plurality of inner circumferential ribs 37 , and a central fixing plate 34 .

[0106] The annular frame 31 is disposed at the ventilation hole 12 and fixed on the housing 1 to support and fix the air outlet grille 3 .

[0107] A plurality of support ribs 32 are arranged at intervals along the circumference of the annular frame 31 . A first end of the support rib 32 is connected to the annular frame 31 , and a second end is located on the inner side of the annular frame 31 .

[0108] The central fixing plate 34 is disposed inside the annular frame 31. One end of the supporting rib 32 is connected to the annular frame 31, and the other end is connected to the central fixing plate 34. A plurality of supporting ribs 32 are radially distributed between the annular frame 31 and the central fixing plate 34.

[0109] A plurality of circumferential ribs 36 are distributed at intervals on the inner side of the annular frame 31, and the plurality of circumferential ribs 36 are cross-connected with the support ribs 32 and are arranged on the air outlet side of the support ribs 32. Along the direction in which the support ribs 32 are away from the annular frame 31, the air outlet side 361 of the plurality of circumferential ribs 36 gradually changes from being inclined in a direction close to the annular frame 31 to being inclined in a direction away from the annular frame 31.

[0110] A plurality of inner circumferential ribs 37 are distributed at intervals on the inner side of the annular frame 31, and the plurality of inner circumferential ribs 37 are cross-connected with the support ribs 32 and are arranged on the air inlet side of the support ribs 32. Along the direction in which the support ribs 32 are away from the annular frame 31, the air inlet side 371 of the plurality of inner circumferential ribs 37 gradually changes from being inclined in a direction away from the annular frame 31 to being inclined in a direction close to the annular frame 31.

[0111] The plurality of outer circumferential ribs 36 and the plurality of inner circumferential ribs 37 are distributed in a one-to-one correspondence along the air outlet direction.

[0112] That is to say, the air outlet grille 3 has two layers of inner and outer circumferential ribs, a plurality of outer circumferential ribs 36 are arranged on the air outlet side of the supporting ribs 32, and the plurality of outer circumferential ribs 36 constitute the outer ribs of the air outlet grille 3, and a plurality of inner circumferential ribs 37 are arranged on the air inlet side of the supporting ribs 32, and the plurality of inner circumferential ribs 37 constitute the inner ribs of the air outlet grille 3, forming a grille structure in the form of serial ribs, such as Figure 5 shown.

[0113] The outer circumferential ribs 36 and the inner circumferential ribs 37 have an inclination angle relative to the support ribs 32, and the inclination angle changes gradually. Along the direction of the support ribs 32 away from the annular frame 31, that is, along the radial direction of the annular frame 31 toward the central fixed disk 34, the air outlet side 361 of a portion of the outer circumferential ribs 36 close to the annular frame 31 is inclined toward the direction close to the annular frame 31, and the portion of the outer circumferential ribs 36 located in the middle is perpendicular to the support ribs 32, and the air outlet side 361 of a portion of the outer circumferential ribs 36 close to the central fixed disk 34 is inclined toward the direction away from the annular frame 31 (that is, toward the direction close to the central fixed disk 34); the air inlet side 371 of a portion of the inner circumferential ribs 37 close to the annular frame 31 is inclined toward the direction away from the annular frame 31, and the portion of the inner circumferential ribs 37 located in the middle is perpendicular to the support ribs 32, and the air inlet side 371 of a portion of the inner circumferential ribs 37 close to the central fixed disk 34 is inclined toward the direction close to the annular frame 31 (that is, toward the direction away from the central fixed disk 34).

[0114] Multiple outer circumferential ribs 36 and multiple inner circumferential ribs 37 are distributed one-to-one along the air outlet direction, an outer air gap is formed between two adjacent outer circumferential ribs 36, an inner air gap is formed between two adjacent inner circumferential ribs 37, and the multiple outer air gaps are connected one-to-one with the multiple inner air gaps along the air outlet direction.

[0115] When the outdoor unit blows air, the air flows out through the inner air outlet gap and the outer air outlet gap. The outer circumferential ribs 36 and the inner circumferential ribs 37 arranged in two layers can effectively improve the flow separation, reduce the influence of the ribs on the flow field, reduce the low-speed area downstream of the ribs, improve the vortex situation downstream of the ribs, and improve the noise.

[0116] In some embodiments, reference Figure 4 and Figure 5 Along the direction of the supporting rib 32 away from the annular frame 31, multiple outer circumferential ribs 36 and multiple inner circumferential ribs 37 form a first rib area N1, a second rib area N2, and a third rib area N3. The first rib area N1, the second rib area N2, and the third rib area N3 are arranged in sequence along the radial direction of the air outlet grille 3, and each rib area has two layers of inner and outer circumferential ribs.

[0117] Reference Figure 6 The outlet sides 361 of the plurality of outer circumferential ribs 36 in the first rib area N1 are inclined toward the direction approaching the annular frame 31 , and the inlet sides 371 of the plurality of inner circumferential ribs 37 are inclined toward the direction away from the annular frame 31 .

[0118] Reference Fig. 9 The plurality of outer circumferential ribs 36 and the plurality of inner circumferential ribs 37 located in the second rib area N2 are perpendicular to the supporting ribs 32 .

[0119] Reference Fig.10 The outlet sides 361 of the plurality of outer circumferential ribs 36 in the third rib area N3 are inclined toward a direction away from the annular frame 31 , and the inlet sides 371 of the plurality of inner circumferential ribs 37 are inclined toward a direction close to the annular frame 31 .

[0120] For example, in Figure 6 The first rib region N1 shown in the figure has seven outer circumferential ribs 36 and seven inner circumferential ribs 37. The inner and outer layers of circumferential ribs in the first rib region N1 are named A. ij , when j = 1, A i1 Represents the outer circumferential rib 36 of the outer layer, when j=2, A i2 Represents the inner circumferential rib 37 of the inner layer. When i=1 to 7, the radius of the outer circumferential rib 36 and the inner circumferential rib 37 gradually decreases, the air outlet side 361 of the outer circumferential rib 36 gradually tilts away from the annular frame 31, and the rotation of the outer circumferential rib 36 relative to the support rib 32 gradually decreases; the air inlet side 371 of the inner circumferential rib 37 gradually tilts toward the annular frame 31, and the rotation of the inner circumferential rib 37 relative to the support rib 32 gradually decreases.

[0121] On this basis, the angle θ of the air inlet side 371 of the plurality of inner circumferential ribs 37 rotating counterclockwise relative to the support rib 32 is 1 The angle θ of the air outlet side 361 of the plurality of circumferential ribs 36 rotating counterclockwise relative to the supporting rib 32 is gradually reduced. 2 Gradually decrease.

[0122] For example, A 12 The angle is 10-30°, other A i2 The angle of the circumferential ribs is 12 Linear relationship, other A i1 The circumferential rib angle and A 11 There is a linear relationship.

[0123] On this basis, A 11 The rotation angle is 0.5 times A 12That is, among the inner circumferential ribs 37 and the outer circumferential ribs 36 arranged one by one along the air outlet direction, θ 1 =2θ 2 .

[0124] For example, the rotation angles of the inner and outer circumferential ribs 36 and the inner circumferential ribs 37 in the first rib region N1 relative to the supporting ribs 32 are as follows: Figure 7 shown.

[0125] For example, in Fig. 9 The second rib region N2 shown has nine outer circumferential ribs 36 and nine inner circumferential ribs 37 . The outer circumferential ribs 36 and the inner circumferential ribs 37 are perpendicular to the supporting ribs 32 .

[0126] For example, in Fig.10 The third rib region N3 shown in the figure has 9 outer circumferential ribs 36 and 9 inner circumferential ribs 37. The inner and outer layers of circumferential ribs 33 in the third rib region N3 are named C. ij , when j = 1, C i1 represents the outer circumferential rib 36 of the outer layer, when j=2, C i2 Represents the inner circumferential rib 37 of the inner layer. When i=1 to 9, the radius of the outer circumferential rib 36 and the inner circumferential rib 37 gradually decreases, the air outlet side 361 of the outer circumferential rib 36 gradually tilts toward the direction close to the central fixed disk 34, and the rotation of the outer circumferential rib 36 relative to the support rib 32 gradually increases; the air inlet side 371 of the inner circumferential rib 37 gradually tilts toward the direction away from the central fixed disk 34, and the rotation of the inner circumferential rib 37 relative to the support rib 32 gradually increases.

[0127] On this basis, the angle θ of the air inlet side 371 of the plurality of inner circumferential ribs 37 rotating clockwise relative to the support rib 32 is 3 The angle θ of the air outlet side 361 of the plurality of circumferential ribs 36 rotating clockwise relative to the support rib 32 is gradually increased. 4 Gradually increase.

[0128] For example, C 92 The angle is 10-30°, other C i2 The angle of the circumferential rib 33 is 92 Linear relationship, other C i1 The angle of the circumferential rib 33 is 91 There is a linear relationship.

[0129] On this basis, C 91 The rotation angle is 0.5 times C 92 That is, among the inner circumferential ribs 37 and the outer circumferential ribs 36 arranged one by one along the air outlet direction, θ 3=2θ 4 . .

[0130] For example, the rotation angles of the inner and outer circumferential ribs 36 and the inner circumferential ribs 37 in the third rib region N3 relative to the supporting ribs 32 are as follows: Fig.11 shown.

[0131] In some embodiments, reference Figure 8 The chord length of the inner circumferential rib 37 and the outer circumferential rib 36 is L, and L is generally 6-10 mm. As the supporting rib 32 moves away from the annular frame 31, L gradually decreases.

[0132] Among the inner circumferential ribs 37 and the outer circumferential ribs 36 arranged one by one along the air outlet direction, the distance between the air outlet side of the inner circumferential rib 37 and the air inlet side of the outer circumferential rib 36 in the radial direction of the air outlet grille 3 is L1, and the distance along the air outlet direction is L2.

[0133] In the first rib area N1 and the third rib area N3 , along the direction in which the supporting rib 32 moves away from the annular frame 31 , L1 and L2 gradually decrease.

[0134] In the second rib area N2 , L1 = 0, and L2 gradually decreases along the direction in which the supporting rib 32 moves away from the annular frame 31 .

[0135] On this basis, L2 = (0.05-0.15) × L, L1 = (0.01-0.2) × L.

[0136] In some embodiments, the cross-sections of the inner circumferential ribs 37 and the outer circumferential ribs 36 are airfoil-shaped, which further improves flow separation, reduces rib resistance, improves noise, and converts the kinetic energy of the outdoor unit's air outlet into pressure potential energy, thereby increasing the air outlet distance.

[0137] Fig.12 This is a simulation effect diagram of the wind resistance of the prior art air outlet grille 3 before optimization; Fig.13 This is a simulation effect diagram of the wind resistance of the air outlet grille 3 after optimization according to the embodiment (the circumferential ribs 33 are not airfoil-shaped); Fig.14 It is a simulation effect diagram of the wind resistance of the air outlet grille 3 after optimization according to the embodiment (the circumferential ribs 33 are airfoil-shaped).

[0138] Fig.15 This is a simulation effect diagram of optimizing the front air supply distance of the air outlet grille 3 in the prior art; Fig.16 This is a diagram showing the air supply distance after the air outlet grille 3 is optimized according to the embodiment. With a fan of 3m / s or more as the high-speed wind area, the airfoil tandem grille can blow 1.91m, while the original grille can only blow 1.60m. After optimization, the air supply distance can be extended by 19.4%.

[0139] Fig.17 The performance comparison of various types of air outlet grilles 3 of the outdoor unit according to the embodiment under different working conditions is shown in FIG. Compared with the optimized front grille, the resistance is reduced by 32% and the noise is improved by 2dB; compared with the ordinary tandem grille, the resistance is reduced by 25% and the noise is improved by 1dB.

[0140] For air conditioners exported to Europe, the air outlet grille of the air conditioner outdoor unit needs to meet the requirements of children's finger test. Therefore, the gap between the ribs in the air outlet grille is relatively small, and the air outlet grille of the air conditioner outdoor unit currently produced is usually made of plastic material to reduce production costs. Due to the limitation of mold technology, the rib height, length and other parameters of the air outlet grille made of plastic material will be limited, resulting in the air outlet volume of the air outlet grille being limited, which in turn causes the air outlet grille to produce greater resistance to the wind blown out by the fan of the air conditioner outdoor unit. If the air volume requirement is to be met, the speed of the fan needs to be increased, which will increase the power of the fan, which will increase the operating cost of the fan.

[0141] Based on this, in some embodiments, such as Fig.18 As shown, the air outlet grille 3 includes an annular frame 31 , a plurality of supporting ribs 32 and a plurality of circumferential ribs 33 . The annular frame 31 is disposed at the ventilation hole 12 and fixed on the casing 1 for supporting and fixing the air outlet grille 3 .

[0142] A plurality of support ribs 32 are arranged at circumferential intervals along the annular frame 31, and the first end of the support rib 32 is connected to the annular frame 31, and the second end of the support rib 32 is located on the inner side of the annular frame 31; a plurality of circumferential ribs 33 are all located on the inner side of the annular frame 31 and are distributed at intervals, and the circumferential ribs 33 are cross-connected with at least part of the support ribs 32, and a grille mesh can be formed by connecting a plurality of support ribs 32 and a plurality of circumferential ribs 33.

[0143] When the wind flows through the air outlet grille 3, part of the wind will be blown out from the gaps in the grille mesh to the outside of the casing 1, and part of the wind will be blown onto the supporting ribs 32 and the circumferential ribs 33, causing the supporting ribs 32 and the circumferential ribs 33 to form resistance to the flow of wind.

[0144] In order to reduce the wind resistance of the supporting ribs 32 and the circumferential ribs 33, as shown in FIG. Fig.19 and Fig. 20 As shown, the axial dimension of the circumferential rib 33 in the annular frame 31 is a first dimension H1, the axial dimension of the supporting rib 32 in the annular frame 31 is a second dimension H2, the first dimension H1 is greater than or equal to 6 mm, and the first dimension H1 and the second dimension H2 are equal to the minimum dimension of the annular frame 31 in the radial direction of the annular frame 31 (such as Fig.18 The ratios of the dimensions H3) shown in are all greater than or equal to 0.011 and less than or equal to 0.014.

[0145] It should be noted that, for the convenience of description, the minimum dimension of the annular frame 31 in the radial direction of the annular frame 31 may be named as the third dimension H3, and the third dimension H3 is greater than or equal to 400 mm and less than or equal to 800 mm.

[0146] The first dimension H1 of the circumferential rib 33 is greater than or equal to 6 mm, which can ensure the demolding requirements of the air outlet grille 3. On this basis, the ratio of the first dimension H1 of the circumferential rib 33 to the third dimension H3 of the annular frame 31 is greater than or equal to 0.011 and less than or equal to 0.014, and the ratio of the second dimension H2 of the support rib 32 to the third dimension H3 of the annular frame 31 is greater than or equal to 0.011 and less than or equal to 0.014. After determining the size of the annular frame 31, that is, after determining the size of the air outlet grille 3, the height of the circumferential rib 33 and the support rib 32 in the axial direction of the annular frame 31 can be as small as possible, so that the length of the gap in the grille mesh in the axial direction of the annular frame 31 can be as small as possible.

[0147] In this way, the length of the path through which the wind flows through the gaps in the grille net can be reduced, thereby reducing the resistance encountered by the wind in the process of flowing through the gaps in the grille net, thereby reducing the resistance generated by the air outlet grille 3 to the wind blown out by the fan 2 of the air conditioner outdoor unit, and thus allowing the fan 2 to meet the air volume demand at a lower speed, thereby reducing the operating power of the fan 2 and reducing the operating cost of the fan 2.

[0148] On this basis, in order to facilitate demolding, the second dimension H2 can be made smaller than the first dimension H1, and the end of the support rib 32 away from the fan 2 is located on the side of the end of the circumferential rib 33 away from the fan 2 close to the fan 2, and the end of the support rib 32 close to the fan 2 is located on the side of the end of the circumferential rib 33 close to the fan 2 away from the fan 2.

[0149] For example, the second dimension H2 can be made 0.4 mm smaller than the first dimension H1, wherein the distance between the end face of the support rib 32 away from the fan 2 and the end face of the circumferential rib 33 away from the fan 2 is 0.2 mm, and the distance between the end face of the support rib 32 close to the fan 2 and the end face of the circumferential rib 33 close to the fan 2 is 0.2 mm.

[0150] Among them, Fig.18 As shown, the sub-grid may further include a central fixing plate 34 , which is disposed on the inner side of the annular frame 31 and is used to fix the grid net together with the annular frame 31 .

[0151] For example, Fig.21As shown, the annular frame 31 is an elliptical ring, the central fixed disk 34 is an elliptical shape matching the shape of the annular frame 31, the supporting ribs 32 are arc-shaped, and the first ends of the plurality of supporting ribs 32 are connected to the annular frame 31, and the second ends of the plurality of supporting ribs 32 are connected to the central fixed disk 34, one part of the plurality of circumferential ribs 33 is an arc-shaped rib 331, and the other part is a circular rib 332, the circular rib 332 and the arc-shaped rib 331 are concentrically arranged, and the circular rib 332 is connected to the plurality of supporting ribs 32, the part of the arc-shaped rib 331 located on the outside of the circular rib 332 is connected to the annular frame 31 and to part of the supporting ribs 32, and the part of the arc-shaped rib 331 located on the inside of the circular rib 332 is connected to the central fixed disk 34 and to part of the supporting ribs 32.

[0152] The third dimension H3 of the annular frame 31 is the length of the short axis of the elliptical annular frame 31 .

[0153] For example, Fig. 22 As shown, the annular frame 31 is annular, the central fixing plate 34 is circular and is arranged concentrically with the annular frame 31, and the air outlet grille 3 also includes a plurality of partition ribs 35, one end of the partition rib 35 is connected to the annular frame 31, and the other end of the partition rib 35 is connected to the central fixing plate 34, and a sector area is formed between two adjacent partition ribs 35. The support rib 32 is linear, one section of the circumferential rib 33 is linear, and the other section is arc-shaped, and the plurality of circumferential ribs 33 and the plurality of support ribs 32 are distributed in a plurality of sector areas. In a sector area, the circumferential rib 33 and the support rib 32 are cross-connected, and one end of the circumferential rib 33 is connected to the annular frame 31, and the other end of the circumferential rib 33 is connected to a partition rib 35, the first end of the support rib 32 is connected to the annular frame 31, and the second end of the support rib 32 is connected to another partition rib 35.

[0154] The third size H3 of the annular frame 31 is the diameter of the annular frame 31 .

[0155] For example, Fig.23As shown, the annular frame 31 is annular, the central fixing disk 34 is circular and is arranged concentrically with the annular frame 31, the support ribs 32 are linear, and the circumferential ribs 33 are annular; multiple circumferential ribs 33 are arranged concentrically and are all arranged concentrically with the central fixing disk 34, and multiple circumferential ribs 33 are all located between the central fixing disk 34 and the annular frame 31, and multiple support ribs 32 extend radially along the annular frame 31, and one part of the support ribs 32 is a first support rib 321, and the other part is The second support rib 322, the first end of the first support rib 321 is connected to the annular frame 31, the second end of the first support rib 321 is connected to the central fixed plate 34, multiple first support ribs 321 are arranged at circumferential intervals along the annular frame 31, the first support rib 321 is connected to multiple circumferential ribs 33, and three second support ribs 322 distributed in a herringbone shape are arranged between any two adjacent first support ribs 321, and the second support rib 322 is connected to some of the circumferential ribs 33.

[0156] The third size H3 of the annular frame 31 is the diameter of the annular frame 31 .

[0157] For example, Fig.18 As shown, the annular frame 31 is in the shape of a circular ring, the central fixing plate 34 is circular and is arranged concentrically with the annular frame 31, and the support ribs 32 extend along the inner wall of the annular frame 31 away from the outer wall of the annular frame 31, that is, the support ribs 32 are linear, wherein the extension direction of the support ribs 32 can be consistent with the radial direction of the annular frame 31, or can be at a certain angle to the radial direction of the annular frame 31. Preferably, the extension direction of the support ribs 32 is consistent with the radial direction of the annular frame 31.

[0158] At this time, the angle between the extension directions of two adjacent supporting ribs 32 (such as Fig.24 The angle α shown is greater than or equal to 7° and less than or equal to 11°. For example, the angle between the extension directions of two adjacent support ribs 32 can be 7°, 8°, 9°, 10°, 11°, etc.

[0159] The angle between the extension directions of two adjacent support ribs 32 can be equal or unequal. Preferably, the angle between the extension directions of two adjacent support ribs 32 is equal, that is, multiple support ribs 32 are arranged at equal intervals along the circumference of the annular frame 31.

[0160] By making the angle between the extension directions of two adjacent support ribs 32 within the above-mentioned range, the support ribs 32 can support the circumferential ribs 33 to ensure that the circumferential ribs 33 are not easily deformed in their radial direction. When the gaps between the circumferential ribs 33 meet the requirements of children's finger tests, the number of support ribs 32 is relatively small to avoid excessive support ribs 32 affecting the air output of the air outlet grille 3, thereby reducing the resistance of the support ribs 32 to the wind blown out by the fan 2.

[0161] Furthermore, the circumferential ribs 33 extend around the circumference of the annular frame 31 , that is, the circumferential ribs 33 are in a circular shape; multiple circumferential ribs 33 can be concentrically arranged, and are all concentrically arranged with the annular frame 31 , and the multiple circumferential ribs 33 are all located between the central fixing plate 34 and the annular frame 31 .

[0162] Since the circumferential ribs 33 are concentrically arranged, the diameter of the circumferential ribs 33 near the central fixed disk 34 is smaller, and the portion of the circumferential ribs 33 located between two adjacent support ribs 32 has a smaller size in the circumferential direction. It is not necessary to set too many support ribs 32 at this position so that the circumferential ribs 33 can meet the children's finger test requirements at this position. If multiple support strips are connected to all circumferential ribs 33, the gap between two adjacent support ribs 32 will be smaller near the central fixed disk 34, which will cause greater resistance to the wind blown out by the fan 2.

[0163] Therefore, the length of some of the support ribs 32 among the plurality of support ribs 32 may be made shorter than the length of another portion of the support ribs 32 .

[0164] Specifically, Fig.24 As shown, among the multiple supporting ribs 32, one part is the first rib 323, and the other part is the second rib 324. The first rib 323 and the second rib 324 both extend radially along the annular frame 31, and the first end of the first rib 323 and the first end of the second rib 324 are both connected to the annular frame 31, the second end of the first rib 323 is connected to the central fixing plate 34, and the first rib 323 is connected to multiple circumferential ribs 33.

[0165] A second rib 324 is located between two adjacent first ribs 323, and the distance from the center of the annular frame 31 to the end surface of the second end of the second rib 324 is a first distance L, and the first distance L is greater than the distance from the center of the annular frame 31 to the end surface of the second end of the first rib 323 (such as Fig.24 The distance L1 shown in FIG. 1 , that is, the length of the second rib 324 is less than the length of the first rib 323 .

[0166] And make the first distance L and the radius of the annular frame 31 (such as Fig.24The ratio of the first distance L to the radius of the annular frame 31 is greater than or equal to 0.55 and less than or equal to 0.7. The ratio of the first distance L to the radius of the annular frame 31 may increase as the radius R1 of the annular frame 31 increases.

[0167] When the radius R1 of the annular frame 31 is determined, the first distance L is determined by the above ratio, that is, the length of the second rib 324 can be determined. Under this length, the length of the second rib 324 can be relatively short, and the second rib 324 can cooperate with the first rib 323 to fix the axial rib, so that the gap between the circumferential ribs 33 meets the requirements of children's finger testing.

[0168] By reducing the length of the second ribs 324 , the resistance of the second ribs 324 in the air outlet grille 3 to the wind can be further reduced, thereby further reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2 .

[0169] It should be noted that the angle α between the extension directions of two adjacent supporting ribs 32 is the angle between the extension direction of the adjacent first rib 323 and the extension direction of the second rib 324 .

[0170] On this basis, in order to facilitate the arrangement of the circumferential ribs 33, the radial spacing between any two adjacent circumferential ribs 33 can be made the same as the radial spacing between the outermost circumferential ribs 33 and the annular frame 31 among the multiple circumferential ribs 33.

[0171] In this way, the position of each circumferential rib 33 can be determined by determining the positional relationship between the outermost circumferential rib 33 among the multiple circumferential ribs 33 between the annular frame 31 and the central fixed plate 34 and / or by determining the positional relationship between the outermost circumferential rib 33 among the multiple circumferential ribs 33 between the second end of the second rib 324 and the center of the annular frame 31 and the annular frame 31.

[0172] For ease of description, the outermost circumferential rib 33 among the multiple circumferential ribs 33 between the annular frame 31 and the central fixed plate 34 can be named as the first circumferential rib 333, and the outermost circumferential rib 33 among the multiple circumferential ribs 33 between the second end of the second rib 324 and the center of the annular frame 31 can be named as the second circumferential rib 334.

[0173] Specifically, in some embodiments, Fig.24 As shown, among the multiple circumferential ribs 33 between the annular frame 31 and the central fixed plate 34, the circumferential ribs 33 in the outermost circle (i.e., the first circumferential ribs 333) are connected to the multiple support ribs 32, and for the circumferential ribs 33 in the outermost circle (i.e., the first circumferential ribs 333), the part located between two adjacent support ribs 32 is the first arc segment 3331.

[0174] It should be noted that two adjacent supporting ribs 32 refer to adjacent first rib 323 and second rib 324 .

[0175] The ratio of the arc length of the first arc segment 3331 to the radius R1 of the annular frame 31 can be greater than or equal to 0.15 and less than or equal to 0.2. The ratio of the arc length of the first arc segment 3331 to the radius R1 of the annular frame 31 increases as the radius of the annular frame 31 increases.

[0176] After determining the radius R1 of the annular frame 31, the arc length of the first arc segment 3331 can be determined by the ratio. Since the angle between the extension directions of two adjacent supporting ribs 32 has been determined, the radius of the first arc segment 3331 can be determined, that is, the radius of the first circumferential rib 333 can be determined, so that the spacing between the first circumferential rib 333 and the annular frame 31 can be determined, and thus the spacing between adjacent circumferential ribs 33 can be determined.

[0177] In other embodiments, among the plurality of circumferential ribs 33 between the second end of the second rib 324 and the center of the annular frame 31, the portion of the outermost circumferential rib 33 (i.e., the second circumferential rib 334) located between two adjacent first ribs 323 is a second arc segment 3341, and the ratio of the arc length of the second arc segment 3341 to the radius R1 of the annular frame 31 is greater than or equal to 0.15 and less than or equal to 0.2. The ratio of the arc length of the second arc segment 3341 to the radius R1 of the annular frame 31 increases as the radius R1 of the annular frame 31 increases.

[0178] In general, among the circumferential ribs 33 located between the second end of the second rib 324 and the annular frame 31, the innermost circumferential rib 33 is usually connected to the end of the second end of the second rib 324. For ease of description, the innermost circumferential rib 33 among the circumferential ribs 33 located between the second end of the second rib 324 and the annular frame 31 may be named as the third circumferential rib 335.

[0179] Therefore, after determining the radius R1 of the annular frame 31, the arc length of the second arc segment 3341 can be determined by the above ratio. Since the angle between the extension directions of two adjacent support ribs 32 has been determined, the angle between two adjacent first ribs 323 can also be determined. Therefore, the radius of the second arc segment 3341 can be determined, that is, the radius of the second circumferential rib 334 can be determined. When the length of the second rib 324 is determined, the radius of the third circumferential rib 335 can also be determined, so that the spacing between the second circumferential rib 334 and the third circumferential rib 335 can be determined, and then the spacing between adjacent circumferential ribs 33 can be determined.

[0180] The spacing between two adjacent circumferential ribs 33 is determined by the ratio of the arc length of the first arc segment 3331 to the radius of the annular frame 31, and / or the arc length of the second arc segment 3341 to the radius of the annular frame 31. When the air outlet grille 3 meets the requirements of children's finger test, the spacing between adjacent circumferential ribs 33 is relatively large, thereby facilitating the air blown out by the fan 2 to flow out from the gaps between the adjacent circumferential ribs 33, thereby reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0181] In some embodiments, when the fan blades 22 in the fan 2 are rotating, the air in the accommodating cavity 11 of the casing 1 is driven to flow toward the ventilation hole 12. The air will produce a certain rotation as the fan blades 22 rotate, and the air will collide with the side walls of the casing 1 and the air outlet grille 3, resulting in different air volumes at different positions of the air outlet grille 3 when the air flows to the air outlet grille 3, and the air outlet directions are also different. Therefore, when the radial dimensions of multiple circumferential ribs 33 are set to be consistent, the air volume of the air outlet grille 3 will be affected.

[0182] Based on this, the radial dimensions of the circumferential ribs 33 at different positions can be adjusted according to the air volume and wind direction at different positions of the air outlet grille 3 .

[0183] Specifically, when the ratio of the radius of the circumferential rib 33 to the first distance L is greater than or equal to 0.28 and less than 0.44, the radial dimension of at least part of the circumferential rib 33 gradually decreases in the direction away from the fan 2 .

[0184] It should be noted that if Fig.25 As shown, the circumferential rib 33 whose ratio of the radius of the circumferential rib 33 to the first distance L is within the above range can be named as the fourth circumferential rib 336. Then, the fourth circumferential rib 336 is usually located near the annular frame 31, and the opening at one end of the fourth circumferential rib 336 close to the fan 2 is smaller than the opening at one end of the fourth circumferential rib 336 away from the fan 2, so that the fourth circumferential rib 336 can guide the wind flowing to the position of the fourth circumferential rib 336.

[0185] like Fig.26 As shown, when the radial dimension of the fourth circumferential rib 336 is not adjusted, the wind collides with the air outlet grille 3 at the location of the fourth circumferential rib 336 to generate a larger vortex, thereby causing greater resistance to the wind.

[0186] like Fig. 27 As shown, after the fourth circumferential rib 336 is adjusted according to the above ratio, the vortex generated by the wind at the location of the fourth circumferential rib 336 is significantly reduced after the fourth circumferential rib 336 guides the wind, the wind encounters less resistance here, and the flow rate is more stable.

[0187] When the ratio of the radius of the circumferential rib 33 to the first distance L is greater than or equal to 0.44 and less than 0.78, the radial dimension of the circumferential rib 33 remains unchanged in the direction away from the fan 2 .

[0188] It should be noted that the circumferential rib 33 whose ratio of the radius of the circumferential rib 33 to the first distance L is within the above-mentioned range can be named the fifth circumferential rib 337. Then, the fifth circumferential rib 337 is usually located in the middle position between the annular frame 31 and the central fixed plate 34. The wind flow at this position is relatively gentle. Therefore, the radial dimension of the fifth circumferential rib 337 does not need to be changed.

[0189] When the ratio of the radius of the circumferential rib 33 to the first distance L is greater than or equal to 0.78, the radial dimensions of at least part of the axial ribs gradually increase in a direction away from the fan 2 .

[0190] It should be noted that the circumferential rib 33 whose ratio of the radius of the circumferential rib 33 to the first distance L is within the above-mentioned range can be named as the sixth circumferential rib 338. Then, the sixth circumferential rib 338 is usually located close to the center fixed disk 34, and the opening at one end of the sixth circumferential rib 338 close to the fan 2 is larger than the opening at the end of the sixth circumferential rib 338 away from the fan 2, so that the sixth circumferential rib 338 can guide the wind flowing to the position of the sixth circumferential rib 338.

[0191] like Fig.28 As shown, when the radial dimension of the sixth circumferential rib 338 is not adjusted, the wind collides more severely with the air outlet grille 3 at the location of the sixth circumferential rib 338, and generates a larger vortex near the center fixing plate 34, thereby causing greater resistance to the wind.

[0192] like Fig.29 As shown, after the sixth circumferential rib 338 is adjusted according to the above ratio, the vortex generated by the wind at the location of the sixth circumferential rib 338 is significantly reduced after the sixth circumferential rib 338 guides the wind, the wind encounters less resistance here, and the flow rate is more stable.

[0193] It should be noted that, when the ratio of the radius of the circumferential rib 33 to the first distance L is less than 0.28, the radius of the circumferential rib 33 is smaller than the radius of the central fixing disk 34. At this time, only the central fixing disk 34 is set, and the circumferential rib 33 cannot be set; and, when the ratio of the radius of the circumferential rib 33 to the first distance L is equal to 0.28, the circumferential rib 33 is fixed on the peripheral wall of the central fixing disk 34.

[0194] On this basis, in order to improve the guiding effect of the circumferential ribs 33 at various positions on the wind flowing to the corresponding positions of the air outlet grille 3, the projection of the axis of the circumferential rib 33 on the inner wall surface of the circumferential rib 33 can be made to be a first straight line segment, that is, the radial dimension of the fourth circumferential rib 336 decreases uniformly from the end close to the fan 2 to the end away from the fan 2, and the radial dimension of the sixth circumferential rib 338 increases uniformly from the end close to the fan 2 to the end away from the fan 2.

[0195] Specifically, Fig.25 As shown, when the ratio of the radius of the circumferential rib 33 to the first distance L is greater than or equal to 0.28 and less than 0.44, the angle C1 between the extension line of the first straight line segment and the axis of the circumferential rib 33 is C1=75-160*(R / L), wherein R is the radius of the circumferential rib 33 and L is the first distance.

[0196] It should be noted that, at this time, the first straight line segment is the projection of the axis of the fourth circumferential rib 336 on the inner wall surface of the fourth circumferential rib 336 .

[0197] When the ratio of the radius of the circumferential rib 33 to the first distance L is greater than or equal to 0.78, the angle C2 between the extension line of the first straight line segment and the axis of the circumferential rib 33 is 50-64*(R / L).

[0198] It should be noted that, at this time, the first straight line segment is the projection of the axis of the sixth circumferential rib 338 on the inner wall surface of the sixth circumferential rib 338 .

[0199] The radial dimensions of the fourth circumferential rib 336 and the sixth circumferential rib 338 calculated by the above formula can better guide the wind flowing to the corresponding position of the air outlet grille 3, thereby greatly reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0200] In some embodiments, in order to enable the support ribs 32 to guide the wind flowing to the air outlet grille 3, as shown in FIG. Fig.30 and Fig.31 As shown, the side surfaces of two adjacent supporting ribs 32 close to each other are wind guide surfaces 325, and the wind guide surfaces 325 are perpendicular to the end surface of the annular frame 31. At this time, it is suitable for the case where the speed of the fan 2 is relatively low.

[0201] Alternatively, the wind guide surface 325 includes a first side edge 3251 and a second side edge 3252. In the axial direction of the annular frame 31, the second side edge 3252 is located on a side of the first side edge 3251 away from the fan 2, and along the rotation direction of the fan 2 (such as Fig.31 In the direction X), the second side edge 3252 is located on one side of the first side edge 3251.

[0202] That is to say, the wind guide surface 325 forms a certain angle with the end surface of the annular frame 31 (such as Fig.31 ), and the inclination direction of the wind guide surface 325 relative to the annular frame 31 is suitable for guiding the wind blown out by the fan 2. Specifically, the angle β between the wind guide surface 325 and the end surface of the annular frame 31 is greater than or equal to 80° and less than 90°. For example, the angle between the wind guide surface 325 and the end surface of the annular frame 31 can be 80°, 82°, 84°, 85°, 86°, 89°, etc.

[0203] When the angle between the wind guide surface 325 and the end surface of the annular frame 31 is within the above range, the wind guide surface 325 can be more conducive to guiding the wind blown out by the fan 2, thereby reducing the resistance generated by the air outlet grille 3 to the wind blown out by the fan 2.

[0204] In some embodiments, in order to allow the wind flowing to the edge of the air outlet grille 3 to flow through the air outlet grille 3 quickly, as shown in FIG. Fig.30 As shown, the axial dimension of the annular frame 31 can be a fourth dimension H4, which is greater than or equal to 5 mm and less than or equal to 60 mm. For example, the fourth dimension H4 can be 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, etc.

[0205] If the fourth dimension H4 of the annular frame 31 is too small, the production difficulty of the annular frame 31 will be increased, and the strength of the annular frame 31 will be reduced, so that the annular frame 31 is easily damaged during use.

[0206] Since the grille mesh is usually fixed to the end of the annular frame 31 away from the fan 2, the fourth dimension H4 of the annular frame 31 greater than 60 mm will cause the distance between the grille mesh and the fan 2 to be too large, resulting in excessive dispersion of the wind after blowing onto the grille mesh, which will in turn cause greater resistance to the wind and greater air volume loss.

[0207] The fourth dimension H4 of the annular frame 31 is within the above range, so that the wind resistance of the annular frame 31 is relatively small.

[0208] On this basis, if Fig.32 As shown, a plurality of through holes 311 may be spaced apart on the outer wall of the annular frame 31 so that the wind flowing to the edge of the air outlet grille 3 flows out through the through holes 311 on the annular frame 31 to further reduce the resistance of the annular frame 31 to the wind blown out by the fan 2.

[0209] Specifically, the maximum dimension of the through hole 311 along the axial direction of the annular frame 31 (eg Fig.32The ratio of the dimension L2 shown in Fig.32 to the radius R1 of the annular frame 31 is greater than or equal to 0.023 and less than or equal to 0.027, and the maximum dimension (such as the dimension L3 shown in

[0210] along the circumferential direction of the annular frame 31) of the through hole 311 is greater than or equal to 0.09 and less than or equal to 0.1.

[0211] It should be noted that the through hole 311 can be a round hole, an oval hole, a square hole, a hole with an irregular shape, a wavy hole, etc. Preferably, the through hole 311 is a wavy hole, and the wavy hole can make the area of the through hole 311 larger, so that it is more conducive to the wind flowing out from the through hole 311. Fig.33 As shown in

[0212] when there is no through hole 311 on the outer side wall of the annular frame 31, the wind flowing to the annular frame 31 is blocked by the annular frame 31, and thus will impact on the annular frame 31, the circumferential rib 33 and the support rib 32 near the annular frame 31, affecting the flow velocity of the wind at this place, and thus causing resistance to the flow of the wind here. Fig.34 As shown in

[0213] In some embodiments, as shown in Figure 1 the air conditioner outdoor unit further includes a wind guide ring 4. The wind guide ring 4 is arranged in the accommodation cavity 11 and is located at the ventilation hole 12. The wind guide ring 4 is connected to the housing 1 and extends around the circumference of the ventilation hole 12. The wind guide ring 4 is used to guide the wind blown out by the fan 2 to the ventilation hole 12 and the air outlet grille 3, so that the wind can flow out from the ventilation hole 12 and the air outlet grille 3 to the outside of the housing 1.

[0214] In order to enable the wind guide ring 4 to smoothly guide the wind blown out by the fan 2 to the air outlet grille 3 and reduce the influence of the wind guide ring 4 on the wind blown out by the fan 2, as shown in Fig.35 the minimum radial dimension of the wind guide ring 4 can be the fifth dimension H5, and the ratio of the third dimension H3 (the minimum dimension of the annular frame 31 in its radial direction) to the fifth dimension H5 is greater than or equal to 1 and less than or equal to 1.25.

[0215] It should be noted that the annular frame 31 is located at the edge of the air outlet grille 3, and the minimum dimension of the annular grille in its radial direction is the minimum radial dimension of the air outlet grille 3.

[0216] The ratio of the third dimension H3 to the fifth dimension H5 is within the above range, and the third dimension H3 of the annular frame 31 is greater than the fifth dimension H5 of the air guide ring 4. Therefore, the wind generated by the fan 2 can directly reach the air outlet grille 3 during the process of being guided by the air guide ring 4 and blowing toward the air outlet grille 3. The wind is not hindered by the air guide ring 4 or the casing 1 before reaching the air outlet grille 3.

[0217] At the same time, the third dimension H3 is increased relative to the fifth dimension H5, so that part of the wind originally blown to the air outlet grille 3 near the annular frame 31 is blown onto the grille net of the air outlet grille 3 and blown out of the casing 1 through the gaps on the grille net, which can further reduce the resistance of the annular frame 31 to the wind, thereby further reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0218] It can be understood that when the third dimension H3 increases and the fifth dimension H5 remains unchanged, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of ​​the wind blowing from the air guide ring 4 to the air outlet grille 3 remains unchanged, and the area of ​​the air outlet grille 3 increases, so that part of the wind originally blown to the air outlet grille 3 near the annular frame 31 is blown on the grille net and blown out of the casing 1 through the gaps in the grille net, thereby further reducing the resistance of the annular frame 31 to the wind, and further reducing the resistance of the air outlet grille 3 to the wind blown out of the fan 2.

[0219] When the third dimension H3 remains unchanged and the fifth dimension H5 decreases, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of ​​the wind from the air guide ring 4 to the air outlet grille 3 decreases, and the area of ​​the air outlet grille 3 remains unchanged, so that part of the wind originally blown to the air outlet grille 3 near the annular frame 31 is blown on the grille net and blown out of the casing 1 through the gaps in the grille net, thereby further reducing the resistance of the annular frame 31 to the wind, and further reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0220] When the third dimension H3 increases and the fifth dimension H5 decreases, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of ​​the wind from the air guide ring 4 to the air outlet grille 3 decreases, and the area of ​​the air outlet grille 3 increases, so that part of the wind originally blown to the air outlet grille 3 near the annular frame 31 is blown on the grille net and blown out of the casing 1 through the gaps in the grille net, thereby further reducing the resistance of the annular frame 31 to the wind, and further reducing the resistance of the air outlet grille 3 to the wind blown out of the fan 2.

[0221] As shown in Table 1 below, the size relationship between the air guide ring 4 and the annular frame 31 is simulated, and the air volume of the air conditioner outdoor unit is also 4626m 3 / h, the speed of fan 2 in scheme 1 is 681rpm, while the speed of fan 2 in scheme 2 is 634rpm. To achieve the same air volume (4626m 3 / h), the speed of fan 2 required by Scheme 2 is 47rpm lower than that of fan 2 required by Scheme 1. At the same time, the noise generated by the air-conditioning outdoor unit of Scheme 1 is 56.8dB, and the noise generated by the air-conditioning outdoor unit of Scheme 2 is 54.7dB. The noise generated by the air-conditioning outdoor unit of Scheme 2 is 2.1dB lower than that of the air-conditioning outdoor unit of Scheme 1.

[0222] Comparing the data of Scheme 1 and Scheme 2, in Scheme 1, the fifth dimension H5 of the air guide ring 4 is 616 mm, the third dimension H3 of the annular frame 31 is 630 mm, the diameter of the largest circle formed by the rotation of the blades 22 of the fan 2 is the first diameter R2, the first diameter R2 is 600 mm, and the dimension of the annular frame 31 in its axial direction (i.e., the fourth dimension H4) is 30 mm. The fifth dimension H5, the first diameter R2, and the fourth dimension H4 in Scheme 2 are consistent with those in Scheme 1. The third dimension H3 is 670 mm, which is 40 mm larger than the third dimension H3 in Scheme 1. The ratio of the third dimension H3 to the fifth dimension H5 in Scheme 2 is 0.065 larger than the ratio of the third dimension H3 to the fifth dimension H5 in Scheme 1.

[0223] It can be seen from the simulation results that the diffusion range of the wind blowing out of the air guide ring 4 remains unchanged, and the increase in the third dimension H3 of the annular frame 31 relative to the fourth dimension H4 of the air guide ring 4 can reduce the air volume loss caused by the air outlet grille 3, so that when the air conditioner outdoor unit reaches the same air volume, the required fan 2 speed is lower and the noise generated is lower.

[0224] Table 1

[0225]

[0226] It can be understood that after the wind generated by the fan 2 is guided to the air outlet grille 3 through the air guide ring 4, the resistance of the air outlet grille 3 is reduced, the air volume loss is reduced, the air volume of the air conditioner outdoor unit is increased, and the heat exchange efficiency of the air conditioner outdoor unit is improved.

[0227] After improving the relationship between the minimum radial dimension of the annular frame 31 of the air conditioner outdoor unit and the minimum radial dimension of the air guide ring 4, compared with the air conditioner outdoor unit without improvement, the improved air conditioner outdoor unit has less air volume loss, and the fan 2 has to reach a lower speed to obtain the same air volume, so that the noise of the air conditioner outdoor unit is also reduced when the air volume and the heat exchange efficiency are the same. The noise of the air conditioner outdoor unit is reduced while the air volume is increased, and the user experience of the air conditioner outdoor unit is improved.

[0228] When the ratio of the third dimension H3 to the fifth dimension H5 is less than 1, that is, the minimum radial dimension of the annular frame 31 is smaller than the minimum radial dimension of the air guide ring 4, and the annular frame 31 is arranged at the ventilation hole 12, and the size of the ventilation hole 12 matches that of the annular frame 31. Therefore, the minimum radial dimension of the ventilation hole 12 is also smaller than the minimum dimension of the air guide ring 4. In the process of the wind blown out by the fan 2 flowing toward the air outlet grille 3, part of the wind will be blown on the inner wall of the accommodating cavity 11 of the casing 1, and the other part will be blown on the air outlet grille 3. The wind blown on the inner wall of the accommodating cavity 11 of the casing 1 cannot be blown out through the casing 1, so that the resistance to the wind blown out by the fan 2 increases, thereby resulting in an increase in wind volume loss and a decrease in wind volume.

[0229] When the ratio of the third dimension H3 to the fifth dimension H5 is greater than 1.25, that is, the minimum radial dimension of the annular frame 31 is greater than the minimum radial dimension of the air guide ring 4. As the minimum radial dimension of the annular frame 31 increases relative to the minimum radial dimension of the air guide ring 4, the amount of air blown out from the gaps on the grille mesh of the air outlet grille 3 will no longer increase, and the amount of air blown to the air outlet grille 3 near the annular frame 31 will no longer decrease, which has no obvious effect on reducing the resistance of the air outlet grille 3 to the wind; and it will also increase the production cost of the air outlet grille 3 and reduce its own strength.

[0230] In some embodiments, Fig.36 As shown, when the ratio of the third dimension H3 to the fifth dimension H5 is greater than or equal to 1.05 and less than or equal to 1.15, the exponential increase of the air volume blown by the fan 2 onto the air outlet grille 3 increases, so that after the wind generated by the fan 2 is guided to the air outlet grille 3 through the air guide ring 4, the resistance reduction effect of the air outlet grille 3 is more obvious, and the resistance of the air outlet grille 3 to the wind blown out by the fan 2 is reduced while controlling the production cost and ensuring its own strength.

[0231] In some embodiments, Fig.35 As shown, the ratio of the fifth dimension H5 (the minimum radial dimension of the air guide ring 4) to the first diameter R2 (the diameter of the largest circle formed by the rotation of the blades 22 of the fan 2) is greater than or equal to 1.02 and less than or equal to 1.1, and the difference between the fifth dimension H5 and the first diameter R2 is greater than or equal to 12 mm.

[0232] The ratio of the fifth dimension H5 to the first diameter R2 is greater than or equal to 1.02, and the difference between the fifth dimension H5 and the first diameter R2 is greater than or equal to 12 mm, so that the diameter of the largest circle formed by the rotation of the fan blade 22 is slightly smaller than the minimum radial dimension of the air guide ring 4, which can meet the assembly requirements of the fan blade 22, so that the fan blade 22 can be installed in the air guide ring 4, and the fan blade 22 will not collide with the air guide ring 4 during operation.

[0233] The ratio of the fifth dimension H5 to the first diameter R2 is less than or equal to 1.1, the diameter of the largest circle formed by the rotation of the fan blades 22 is smaller than the minimum radial dimension of the air guide ring 4, and the size difference between the two prevents the wind generated by the fan blades 22 from being too dispersed in the air guide ring 4, so that the wind generated by the fan blades 22 will not collide too much with the air guide ring 4, the casing 1 and the air outlet grille 3, so that the wind generated by the fan 2 is subject to less resistance and the air volume loss is smaller.

[0234] When the ratio of the fifth dimension H5 to the first diameter R2 is less than 1.02, the assembly requirements of the fan blades 22 cannot be met, and the fan blades 22 cannot be installed in the air guide ring 4.

[0235] When the ratio of the fifth dimension H5 to the first diameter R2 is greater than 1.1, the diameter of the largest circle formed by the rotation of the fan blades 22 is smaller than the minimum radial dimension of the air guide ring 4, and the size difference between the two causes the wind generated by the fan blades 22 to be too dispersed in the air guide ring 4, thereby causing the wind generated by the fan blades 22 to collide too much with the air guide ring 4, the casing 1 and the air outlet grille 3, thereby increasing the resistance to the wind generated by the fan 2 and increasing the wind volume loss.

[0236] In some embodiments, Fig.37 As shown, the air guide ring 4 has a first part 41 and a second part 42 connected together, the first part 41 is connected to the casing 1, and the second part 42 is located on the side of the first part 41 away from the casing 1, and the radial size of the first part 41 gradually decreases along the direction from the first part 41 to the second part 42.

[0237] The first part 41 of the air guide ring 4 guides the wind blown out by the fan 2, so that the wind can be blown toward the air outlet grille 3 along the inner circumference of the first part 41, reducing the collision between the wind and the air guide ring 4, further reducing the resistance to the wind, and increasing the air volume of the air conditioner outdoor unit.

[0238] In some embodiments, the dimension of the first portion 41 in the axial direction of the ventilation hole 12 (eg Fig.37 When the dimension M shown in is greater than 0 and less than or equal to 20 mm, the first part 41 allows the wind blown out by the fan 2 to be blown toward the air outlet grille 3 along the inner circumference of the first part 41, thereby reducing the collision between the wind and the air guide ring 4, further reducing the resistance to the wind, and increasing the air volume of the air conditioner outdoor unit; and the wind blown out by the fan 2 will not be too dispersed after being guided by the first part 41, and will not cause the wind volume to increase toward the air outlet grille 3 near the annular frame 31, thereby not increasing the resistance of the air outlet grille 3 to the wind, and thus not increasing the air volume loss.

[0239] The dimension of the first portion 41 in the axial direction of the ventilation hole 12 (eg Fig.37When the dimension M) shown in the figure is greater than 20 mm, the first part 41 will cause the wind blown out by the fan 2 to be too dispersed after being guided by the first part 41, resulting in an increase in the amount of wind blowing toward the air outlet grille 3 near the annular frame 31, increasing the resistance of the air outlet grille 3 to the wind, thereby increasing the air volume loss.

[0240] In some embodiments, Fig.37 As shown, the first part 41 of the air guide ring 4 forms a circle at the ventilation hole 12, and the angle between the normal line of the inner circumference of the first part 41 and the axis of the ventilation hole 12 (as shown in FIG. Fig.37 The angle γ shown in FIG. 4 is greater than or equal to 75° and less than or equal to 90°. For example, the angle γ between the normal line of the inner circumference of the first portion 41 and the axis of the ventilation hole 12 can be 75°, 80°, 85°, 90°, etc.

[0241] The first part 41 allows the wind blown out by the fan 2 to blow toward the air outlet grille 3 along the inner circumference of the first part 41, reducing the collision between the wind and the air guide ring 4, further reducing the resistance to the wind, and increasing the air volume of the air conditioner outdoor unit. The wind blown out by the fan 2 will not be too dispersed after being guided by the first part 41, and the wind volume of the wind blowing toward the air outlet grille 3 near the annular frame 31 will not increase, and the wind resistance of the air outlet grille 3 will not increase, thereby not increasing the loss of air volume.

[0242] When the angle γ between the normal of the inner circumferential surface of the first part 41 and the axis of the ventilation hole 12 is less than 75°, the first part 41 will cause the wind blown out of the fan 2 to be too dispersed after being guided by the first part 41, resulting in an increase in the amount of wind blown toward the air outlet grille 3 near the annular frame 31, and an increase in the resistance of the air outlet grille 3 to the wind, thereby increasing the air volume loss.

[0243] When the angle γ between the normal of the inner circumference of the first part 41 and the axis of the ventilation hole 12 is 90°, the inner circumference of the first part 41 will extend along the axis of the ventilation hole 12 in the direction away from the accommodating cavity 11, and the inner circumference of the first part 41 loses the function of guiding wind diffusion. The wind will blow onto the air guide ring 4 and collide with the air guide ring 4, causing the wind to be resisted by the air guide ring 4, thereby increasing the loss of air volume of the air conditioner outdoor unit and reducing the air volume.

[0244] When the angle γ between the normal of the inner circumference of the first part 41 and the axis of the ventilation hole 12 is greater than 90°, the radial dimension of the first part 41 gradually increases in the direction from the first part 41 to the second part 42, and the inner circumference of the first part 41 concentrates the wind blown out by the fan 2 toward the central axis of the ventilation hole 12, and the inner circumference of the first part 41 blocks the wind blown out by the fan 2, and the air guide ring 4 increases the resistance to the wind, increases the wind loss, and reduces the air volume.

[0245] In some embodiments, the minimum radial dimension of the second portion 42 is the minimum radial dimension of the air guide ring 4 .

[0246] In some embodiments, Fig.37 As shown, the casing 1 includes a panel 13, which includes a first plate 131, a second plate 132 and a third plate 133 which are sequentially connected along the radial direction of the ventilation hole 12, the first plate 131 surrounds the second plate 132, the second plate 132 surrounds the third plate 133, the third plate 133 is located on the side of the first plate 131 facing the accommodating cavity 11, and the ventilation hole 12 is opened on the third plate 133.

[0247] The third plate 133 is located on the side of the first plate 131 facing the accommodating cavity 11, so that when the air outlet grille 3 is installed at the ventilation hole 12, the axial size of the air-conditioning outdoor unit in the ventilation hole 12 is smaller than the sum of the axial sizes of the annular frame 31 and the casing 1 in the ventilation hole 12, which meets the requirements of the small-volume design of the air-conditioning outdoor unit.

[0248] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0249] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioner outdoor unit, include: A housing is formed with a receiving cavity inside, and a ventilation hole is opened on the side wall of the housing; A fan is disposed in the accommodating cavity, and the ventilation hole is located at the air outlet side of the fan; It is characterized by further comprising: The air outlet grille comprises: An annular frame, which is arranged at the ventilation hole and fixed on the housing; A plurality of supporting ribs are arranged at intervals along the circumference of the annular frame, wherein a first end of the supporting rib is connected to the annular frame and a second end is located inside the annular frame; A plurality of outer circumferential ribs are spaced and distributed on the inner side of the annular frame, the plurality of outer circumferential ribs are cross-connected with the support ribs and are arranged on the air outlet side of the support ribs, and along the direction in which the support ribs are away from the annular frame, the air outlet side of the plurality of outer circumferential ribs gradually changes from being inclined in a direction close to the annular frame to being inclined in a direction away from the annular frame; A plurality of inner circumferential ribs are spaced and distributed on the inner side of the annular frame, the plurality of inner circumferential ribs are cross-connected with the support ribs and are arranged on the air inlet side of the support ribs, and along the direction in which the support ribs are away from the annular frame, the air inlet side of the plurality of inner circumferential ribs gradually changes from being inclined in a direction away from the annular frame to being inclined in a direction close to the annular frame; The plurality of outer circumferential ribs and the plurality of inner circumferential ribs are distributed in a one-to-one correspondence along the air outlet direction.

2. The air conditioner outdoor unit according to claim 1, It is characterized in that Along the direction of the supporting ribs away from the annular frame, the plurality of outer circumferential ribs and the plurality of inner circumferential ribs form a first rib area, a second rib area, and a third rib area; The air outlet sides of the plurality of outer circumferential ribs located in the first rib area are inclined toward the direction close to the annular frame, and the air inlet sides of the plurality of inner circumferential ribs are inclined toward the direction away from the annular frame; The plurality of outer circumferential ribs and the plurality of inner circumferential ribs located in the second rib area are perpendicular to the supporting ribs; The air outlet sides of the plurality of outer circumferential ribs located in the third rib area are inclined toward a direction away from the annular frame, and the air inlet sides of the plurality of inner circumferential ribs are inclined toward a direction close to the annular frame.

3. The air conditioner outdoor unit according to claim 2, It is characterized in that In the first rib area, along the direction in which the supporting rib is away from the annular frame, the angle θ of the air inlet side of the plurality of inner circumferential ribs rotated counterclockwise relative to the supporting rib is 1 The angle θ of the air outlet side of the plurality of the outer circumferential ribs rotating counterclockwise relative to the supporting ribs is gradually reduced. 2 Gradually decrease.

4. The air conditioner outdoor unit according to claim 3, It is characterized in that Among the inner circumferential ribs and the outer circumferential ribs arranged one by one in the air outlet direction, θ 1 =2θ 2 .

5. The air conditioner outdoor unit according to claim 2, It is characterized in that In the third rib region, along the direction in which the support rib is away from the annular frame, the angle θ of the wind inlet side of the plurality of inner circumferential ribs rotating clockwise relative to the support rib is 3 The angle θ of the air outlet side of the plurality of the outer circumferential ribs rotating clockwise relative to the support ribs gradually increases. 4 Gradually increase.

6. The air conditioner outdoor unit according to claim 5, It is characterized in that Among the inner circumferential ribs and the outer circumferential ribs arranged one by one in the air outlet direction, θ 3 =2θ 4 .

7. The air conditioner outdoor unit according to claim 2, It is characterized in that The chord length of the inner circumferential rib and the outer circumferential rib is L, and L gradually decreases in the direction in which the supporting rib is away from the annular frame; Among the inner circumferential ribs and the outer circumferential ribs arranged one by one in the air outlet direction, the distance between the air outlet side of the inner circumferential rib and the air inlet side of the outer circumferential rib in the radial direction of the air outlet grille is L1, and the distance along the air outlet direction is L2; In the first rib area and the third rib area, along the direction in which the supporting ribs are away from the annular frame, L1 and L2 gradually decrease; In the second rib area, L1=0, and L2 gradually decreases along the direction in which the supporting rib moves away from the annular frame.

8. The air conditioner outdoor unit according to claim 7, It is characterized in that L2=(0.05-0.15)×L, L1=(0.01-0.2)×L.

9. The air conditioner outdoor unit according to any one of claims 1 to 8, It is characterized in that The cross-sections of the inner circumferential ribs and the outer circumferential ribs are airfoil-shaped.

10. An air conditioner outdoor unit, include: A housing is formed with a receiving cavity inside, and a ventilation hole is opened on the side wall of the housing; A fan is disposed in the accommodating cavity, and the ventilation hole is located at the air outlet side of the fan; It is characterized by further comprising: The air outlet grille comprises: An annular frame, which is arranged at the ventilation hole and fixed on the housing; A plurality of supporting ribs are arranged at intervals along the circumference of the annular frame, wherein a first end of the supporting rib is connected to the annular frame and a second end is located inside the annular frame; A plurality of outer circumferential ribs are spaced apart and distributed on the inner side of the annular frame, the plurality of outer circumferential ribs are cross-connected with the supporting ribs and are arranged on the air outlet side of the supporting ribs; A plurality of inner circumferential ribs are spaced apart and distributed on the inner side of the annular frame, wherein the plurality of inner circumferential ribs are cross-connected with the supporting ribs and are arranged on the air inlet side of the supporting ribs; The plurality of outer circumferential ribs and the plurality of inner circumferential ribs are distributed one-to-one in the wind outlet direction, an outer wind gap is formed between two adjacent outer circumferential ribs, an inner wind gap is formed between two adjacent inner circumferential ribs, and the plurality of outer wind gaps and the plurality of inner wind gaps are connected one-to-one in the wind outlet direction.

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