Air conditioner with grating

Abstract

The invention discloses an air conditioner with a grille, relates to the technical field of air conditioners, and aims to solve the problem that the air resistance at an air outlet grille of an outdoor unit in the prior art is relatively large. The air outlet grille of the air conditioner with the grille comprises a positioning part, a supporting part and a grille net. The positioning part is close to the ventilation opening and connected with the machine shell. The supporting part is located in the positioning part. The grating net comprises a plurality of connecting parts, a plurality of outer grating strips and a plurality of inner grating strips. The connecting parts are located between the supporting part and the positioning part and distributed around the supporting part at intervals, and the supporting part is connected with the positioning part through at least part of the connecting parts. The multiple outer grating strips are located between the positioning part and the supporting part and distributed at intervals in the radial direction of the positioning part, and the multiple outer grating strips are connected with at least part of the connecting part in a crossed mode. The multiple inner grid strips are located on the air inlet sides, close to the draught fan, of the outer grid strips in the axial direction of the air outlet grid, and the inner grid strips and the outer grid strips are arranged at intervals. The air conditioner with the grating is used for exchanging heat with air.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner provided with a grille. 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] At present, in order to reduce the production cost of the air outlet grille of the air conditioner outdoor unit, the air outlet grille is usually made of plastic material. Due to the limitation of the mold process, the parameters such as the rib length and axial height of the air outlet grille made of plastic material will be limited, thereby resulting in the air outlet volume of the air outlet grille being limited, thereby generating greater resistance to the wind blown out by the fan of the air conditioner outdoor unit.

[0004] In view of the above situation, currently, the air outlet grille is usually adjusted to reduce the resistance of the air blown out by the fan of the air conditioner outdoor unit by adjusting the gap between the ribs in the air outlet grille. However, since the gap width between the ribs in the air outlet grille needs to meet relevant standards, that is, the gap width is limited and cannot be too large, the air outlet grille still causes a large resistance to the air blown out by the fan of the air conditioner outdoor unit. Summary of the invention

[0005] The embodiment of the present invention provides an air conditioner with a grille, which solves the problem of large wind resistance at the air outlet grille of the outdoor unit in the prior art.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] An air conditioner with a grille includes a housing, a fan and an air outlet grille. A receiving cavity is formed inside the housing, and a vent is formed on the side wall of the housing. The fan is located in the receiving cavity, and the vent is located on the air outlet side of the fan. The air outlet grille includes a positioning portion and a grille net. The positioning portion is arranged near the vent and connected to the housing. The grille net is located inside the positioning portion and connected to the positioning portion, and the grille net is a multi-layer serial structure distributed at intervals along the axial direction of the air outlet grille for circulating air.

[0008] In some embodiments, the grille net is used to circulate air and includes a plurality of connecting parts, a plurality of outer grille bars, and a plurality of inner grille bars. The plurality of connecting parts are located between the support part and the positioning part and are spaced around the support part, and the support part is connected to the positioning part through at least part of the connecting parts. The plurality of outer grille bars are located between the positioning part and the support part and are spaced along the radial direction of the positioning part, and the plurality of outer grille bars are cross-connected with at least part of the connecting parts. The plurality of inner grille bars are along the axial direction of the air outlet grille, and the inner grille bars are located on the air inlet side of the outer grille bars close to the fan and are spaced from the outer grille bars.

[0009] The air conditioner provided with a grille provided in the present application can drive air to circulate between the accommodating cavity and the external environment through the vents through the operation of the fan, and the circulating air flows through the heat exchanger in the accommodating cavity and exchanges heat with the refrigerant flowing in the heat exchanger, so that the cooling or heating system of the air conditioner can operate stably. The positioning part is arranged near the vents and connected to the casing, and is used for positioning and installing the grille.

[0010] The grille mesh is a multi-layer serial structure distributed at intervals along the axial direction of the positioning part, which prevents foreign matter from entering the accommodating cavity through the ventilation opening and is also used for air circulation. When the air flows through the grille mesh of the multi-layer serial structure, it can undergo multiple aerodynamic separations and reattaches, so that the thickness of the boundary layer attached to the wall surface of the grille bar is always in a small range. In this way, while reducing the friction resistance, it can also extend the adhesion time of the fluid on the wall surface of the grille bar of the multi-layer grille mesh, such as reducing the friction resistance between the fluid and the inner grille bar and the outer grille bar, and increasing the adhesion time of the fluid on the wall surface of the inner grille bar and the outer grille bar, thereby delaying the deceleration effect generated after the aerodynamic separation of the fluid, and at the same time, the air that has undergone multiple aerodynamic separations and reattaches has a smaller turbulent area when it flows out of the grille mesh. Therefore, the setting of the multi-layer serial structure grille mesh will not increase the wind resistance on the inner side of the positioning part, but will greatly reduce the area of ​​the low-speed eddy zone and the thickness of the boundary layer at the air outlet side of the grille mesh, so that the air can flow quickly and smoothly through the multi-layer structure grille mesh, thereby reducing the wind resistance and aerodynamic noise at the air outlet grille and improving the air outlet efficiency, which is beneficial to increasing the air outlet volume of the outdoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the three-dimensional structure of an outdoor unit of an air conditioner provided in an embodiment of the present application;

[0012] Figure 2 for Figure 1 A front view of the air outlet grille shown in ;

[0013] Figure 3 for Figure 2 A cross-sectional view along line AA;

[0014] Figure 4A wind field simulation schematic diagram of an air outlet grille with a single-layer grille mesh structure;

[0015] Figure 5 for Figure 3 A wind field simulation schematic diagram of an air outlet grille with a double-layer grille mesh structure shown;

[0016] Figure 6 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0017] Figure 7 for Figure 3 A partial enlarged schematic diagram of point C in the middle;

[0018] Figure 8 for Figure 3 A partial enlarged schematic diagram of point D in the middle;

[0019] Fig. 9 for Figure 3 A partial enlarged schematic diagram of point E in the middle;

[0020] Fig.10 for Figure 3 A partial enlarged schematic diagram of the grille mesh near the support portion shown in FIG.

[0021] Fig.11 It is a schematic diagram of the broken line relationship between the air volume and the noise in the control group and the improved group of an outdoor unit;

[0022] Fig.12 for Figure 1 One of the front views of the air outlet grille in another embodiment shown in ;

[0023] Fig.13 for Fig.12 A cross-sectional view of the air outlet grille shown;

[0024] Fig.14 for Fig.13 A partial enlarged schematic diagram of point F in the middle;

[0025] Fig.15 for Figure 1 A second front view of the air outlet grille in another embodiment shown in FIG.

[0026] Fig.16 for Figure 1 The third front view of the air outlet grille in another embodiment shown in FIG.

[0027] Fig.17 for Figure 1 The air outlet grille shown in FIG. 4 is a front view of another embodiment;

[0028] Fig.18 for Fig.12A partial structural schematic diagram of the air outlet grille is shown;

[0029] Fig.19 for Fig.13 A partial enlarged schematic diagram of the G in the middle;

[0030] Fig. 20 is a schematic diagram of a simulation effect of the wind resistance of the air outlet grille when the radial dimension of the sixth air outlet grille is not adjusted;

[0031] Fig.21 is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille after the radial size of the sixth air outlet grille is adjusted;

[0032] Fig. 22 is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille when the radial size of the eighth air outlet grille is not adjusted;

[0033] Fig.23 is a schematic diagram of the simulation effect of the wind resistance of the air outlet grille after the radial size of the eighth air outlet grille is adjusted;

[0034] Fig.24 for Fig.12 Another cross-sectional view of the air outlet grille shown;

[0035] Fig.25 for Fig.24 A local enlarged schematic diagram of point I in the middle;

[0036] Fig.26 for Fig.12 Another partial structural schematic diagram of the air outlet grille is shown;

[0037] Fig. 27 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 wall of the positioning portion;

[0038] Fig.28 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 wall of the positioning part;

[0039] Fig.29 for Figure 1 A cross-sectional view of an outdoor unit shown in ;

[0040] Fig.30 The relationship diagram of the influence of the ratio of the third dimension to the fifth dimension on the air volume at the same speed;

[0041] Fig.31 for Fig.29 Enlarged schematic diagram of the structure at J in the middle. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] As a common household appliance, air conditioners are widely used in daily life. Air conditioners include an outdoor unit and an indoor unit. The indoor air temperature can be regulated through the cooperation between the outdoor unit and the indoor unit.

[0044] For example, 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 dissipates heat through the heat exchanger of the outdoor unit and becomes a normal-temperature and high-pressure liquid refrigerant. The normal-temperature and high-pressure liquid refrigerant then enters the indoor unit after being decompressed by a pressure reducer such as a capillary tube or an electronic throttle valve. The normal-temperature and low-pressure liquid refrigerant absorbs a large amount of heat through the heat exchanger of the indoor unit and vaporizes and flows into the compressor to continue circulating. The air temperature in the indoor unit cavity will be reduced, and the fan of the indoor unit will then output the low-temperature air through the grille, thereby cooling the indoor air.

[0045] When the air conditioner is heating, the compressor in the outdoor unit compresses the gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant enters the heat exchanger of the indoor unit and condenses and liquefies into normal-temperature and high-pressure liquid refrigerant, releasing a large amount of heat. The air temperature in the indoor unit cavity will rise, and the fan of the indoor unit will then output the high-temperature air through the grille, thereby raising the temperature of the indoor air. The normal-temperature and high-pressure liquid refrigerant enters the heat exchanger of the outdoor unit after being reduced in pressure by the pressure reducer, and the normal-temperature and high-pressure liquid refrigerant evaporates and absorbs heat to become low-temperature and low-pressure gaseous refrigerant and flows into the compressor to continue circulating.

[0046] During the operation of the air conditioner, the outdoor unit transmits 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.

[0047] In order to reduce production costs, the air outlet grilles of the air conditioner outdoor units currently produced are usually made of plastic materials. Due to the limitation of mold technology, the parameters of the rib height, thickness, length and other parameters of the air outlet grilles made of plastic materials will be limited, resulting in the air outlet volume of the air outlet grilles being limited. As a result, the air outlet grilles will produce greater resistance to the air blown out by the fan of the air conditioner outdoor unit. If the air volume requirement is to be met, the fan speed needs to be increased, which will increase the fan power, which will increase the operating cost of the fan and reduce the energy efficiency ratio of the air conditioner.

[0048] In view of the above situation, currently, the resistance of the air outlet grille to the air blown out by the fan of the air conditioner outdoor unit is usually reduced by adjusting the radial or circumferential gap between the ribs in the air outlet grille. However, the gap width between the ribs in the air outlet grille needs to meet relevant standards to improve the safety performance of the outdoor unit.

[0049] For example, one of the technical indicators has a strict limit on the gap width, that is, the gap width between two adjacent ribs needs to be able to prevent the insertion of children's fingers. Therefore, it is necessary to set a smaller gap between the ribs in the air outlet grille, that is, the width of the gap is limited and cannot be too large, so that the air outlet grille produces a greater resistance to the air blown out by the fan of the air conditioner outdoor unit.

[0050] Based on this, Figure 1 As shown, Figure 1 The present invention is a schematic diagram of a three-dimensional structure of an outdoor unit 20 of an air conditioner 100 provided in an embodiment of the present application. The outdoor unit 20 includes a housing 1, a fan 2, and an air outlet grille 3. An accommodating cavity 11 is formed inside the housing 1, and the fan 2 is located in the accommodating cavity 11. A vent 12 is provided on the side wall of the housing 1, and the vent 12 is located on the air outlet side of the fan 2.

[0051] Exemplarily, the vent 12 can be provided on the front side wall of the casing 1, and an air inlet can be provided on at least one side of the rear side wall, the left side wall and the right side wall of the casing 1, and the heat exchanger of the outdoor unit can be located in the accommodating cavity and arranged close to the air inlet. Alternatively, the vent 12 can be provided on the upper side wall of the casing 1, and the air inlet can be provided on at least one of the front and rear or left and right side walls of the casing 1, and the air outlet side of the fan 2 can be arranged upward toward the vent 12, so as to drive the air to flow through the air inlet, the accommodating cavity and the vent.

[0052] In this way, the air flowing into the accommodating chamber 11 can fully exchange heat with the heat exchanger in the accommodating chamber 11, so that the refrigerant in the heat exchanger can quickly exchange heat and liquefy (cooling state) or absorb heat and vaporize (i.e. heating state), and the air after heat exchange can be discharged from the accommodating chamber 11 through the vent 12.

[0053] like Figure 1 As shown, the fan 2 may include a motor 21 and a fan blade 22. The motor 21 is connected to the housing 1. For example, the motor 21 may be fixedly installed in the accommodating cavity 11 through a structure such as a bracket. The fan blade 22 is connected to the motor 21, and the fan blade 22 is opposite to the vent 12. The motor 21 can drive the fan blade 22 to rotate, so that the fan blade 22 drives the tiny particles (various gas molecules, dust, etc.) in the air to move quickly along the axial direction of the motor 21 and the fan blade 22, thereby forming wind.

[0054] By rotating the fan blades 22, the air on the side of the fan blades 22 away from the vent 12 can be continuously sent to the side of the fan blades 22 close to the vent 12, so that a high-pressure area will be formed on the side of the fan blades 22 close to the vent 12, and the side of the fan blades 22 away from the vent 12 will be a negative pressure area. The air outside the casing 1 can continuously flow into the low-pressure area under the action of atmospheric pressure and form high-pressure air at the high-pressure area through the action of the rotating fan blades 22, and the high-pressure air can be blown out through the vent 12, thereby forming a circulating flow of air, so that the air can be blown out from the vent 12 continuously for efficient heat exchange of the heat exchanger.

[0055] As the fan blades continue to rotate, a continuous flow of wind will flow toward the vent 12 , and then be discharged to the outside of the housing 1 after passing through the vent 12 .

[0056] The air outlet grille 3 is provided at the vent 12 and fixed on 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 12 and is discharged outside the housing 1. In order to reduce the wind resistance when the air outlet grille 3 is provided at the vent 12.

[0057] like Figure 2 and Figure 3 As shown, the air outlet grille 3 includes a positioning portion 31, a supporting portion 32 and a grille mesh 33. The positioning portion 31 is arranged near the vent 12 and connected to the housing 1. The positioning portion 31 can be a regular or irregular frame structure such as a round frame, an elliptical frame, a rectangular frame, a triangular frame, etc. The positioning portion 31 can be detachably installed on the edge of the housing 1 near the vent 12 by means of screws or clamping, etc., for supporting and fixing the air outlet grille 3, and the supporting portion 32 is located on the inner side of the positioning portion 31.

[0058] like Figure 2 and Figure 3 As shown, the support portion 32 may be a disc-shaped structure, and the support portion 32 of the disc-shaped structure may be arranged close to the center of the positioning portion 31, so as to facilitate the connection and installation of the grille net 33 between the positioning portion 31 and the support portion 32. Alternatively, the grille net 33 may be directly installed inside the positioning portion 31, in which case the support portion 32 may be regarded as a partial structure of the grille net 33 close to the center area, and the structure is simple.

[0059] Based on this, Figure 3 As shown, the grille net 33 is located inside the positioning portion 31 and connects the positioning portion 31 and the support portion, and the grille net 33 is a multi-layer serial structure distributed along the axial direction of the air outlet grille 3 for circulating air. Figure 1 , along the axial direction of the air outlet grille 3, it is taken as an example that the side of the air outlet grille 3 close to the fan 2 is the air inlet side, and the side of the air outlet grille 3 away from the fan 2 is the air outlet side.

[0060] The research found that Figure 4 As shown, Figure 4 A wind field simulation diagram of an air outlet grille with a single-layer grille mesh structure is shown in FIG. When air flows through the air outlet grille 3 with a single-layer grille mesh structure 33, a relatively serious flow separation will occur on the air outlet side of the grille. Thus, a large area of ​​low-speed eddy flow area is formed, resulting in an increase in aerodynamic resistance at the grille mesh 33, and the low-speed eddy flow area will also increase the turbulent kinetic energy at the grille mesh 33, so that the aerodynamic noise is significantly increased.

[0061] For example, Figure 4 As shown, a large low-speed eddy zone is formed on the air outlet side of the multiple grilles near the support portion 32, and a low-speed eddy zone is formed on the air inlet side, the air outlet side and the area between two adjacent grilles of the multiple grilles near the positioning portion 31. That is, when the air flows through the grille net 33 of this structure, the wind resistance is large and the wind speed is low, thereby reducing the air outlet efficiency of the outdoor unit.

[0062] However, by setting the grid mesh 33 to be a multi-layer serial structure distributed along the axial direction of the positioning portion 31, as shown in FIG. Figure 5 As shown, Figure 5 for Figure 3 A wind field simulation schematic diagram of the air outlet grille 3 of the double-layer grille mesh structure is shown. The arrangement of the multi-layer tandem structure grille mesh 33 does not increase the wind resistance inside the positioning portion 31, and greatly reduces the area of ​​the low-speed vortex zone at the air outlet side of the grille mesh 33 (especially the air outlet side of the outer grille), so that air can flow quickly and smoothly through the multi-layer structure grille mesh 33, thereby reducing the wind resistance and aerodynamic noise at the air outlet grille 3 and improving the air outlet efficiency.

[0063] In addition, since the grille net 33 is a multi-layer serial structure distributed at intervals along the axial direction of the air outlet grille 3, the air can be aerodynamically separated and reattached multiple times when flowing through the grille net 33 of the multi-layer serial structure, so that the thickness of the boundary layer attached to the wall surface of the grid bar is always in a small range. In this way, while reducing the friction resistance, the adhesion time of the fluid on the wall surface of the grid bar of the multi-layer grille net can also be prolonged, such as reducing the friction resistance between the fluid and the inner grid bar and the outer grid bar, and increasing the adhesion time of the fluid on the wall surface of the inner grid bar and the outer grid bar, thereby delaying the deceleration effect generated after the fluid aerodynamic separation.

[0064] In some embodiments, Figure 6 As shown, Figure 6 for Figure 3In the partial enlarged schematic diagram at B in the middle, the grille net 33 may include a plurality of connecting parts 331, a plurality of outer grille bars 332 and a plurality of inner grille bars 333. The support part 331 may be a strip-shaped structure, and the plurality of connecting parts 331 may be distributed between the support part 32 and the positioning part 31, and the plurality of connecting parts 331 may be distributed around the support part 32 at intervals, so that the support part 32 may be connected to the positioning part 31 through at least part of the connecting parts 331.

[0065] like Figure 6 As shown, taking the axis of the air outlet grille 3 being parallel to the Y direction as an example, the motor 21 (such as Figure 1 The axis of the fan blade 22 can be colinear and parallel to the Y direction, and the axis of the vent 12 can also be parallel to the Y direction. Correspondingly, the side of the air outlet grille 3 away from the fan 2 along the Y direction is the air outlet side (i.e., the outer side or the front side), and the side of the air outlet grille 3 close to the fan 2 along the Y direction is the air inlet side (i.e., the inner side or the rear side).

[0066] Based on this, Figure 6 As shown, multiple outer grille bars 332 are located between the positioning portion 31 and the support portion 32, and multiple outer grille bars 332 can be distributed at intervals along the radial direction of the positioning portion 31. Multiple outer grille bars 332 can be cross-connected with at least part of the connecting portion 331 to form an outer layer structure of the grille net 33.

[0067] Continue to refer to Figure 6 , along the Y direction, a plurality of inner grille bars 333 are located on the air inlet side of the outer grille bars 332 and are spaced apart from the outer grille bars 332. Figure 5 In the process of air flowing from the air inlet side to the air outlet side of the air outlet grille 3 along the Y direction, although the air will undergo partial flow separation after passing through the inner grille bar 333, the air will quickly adhere to the surface of the outer grille bar 332 and undergo secondary flow separation after passing through the outer grille bar 332.

[0068] pass Figure 5 It can be seen from the wind field simulation effect shown that after the air flows through the inner grille bars 333 and the outer grille bars 332 and undergoes two flow separations, the low-speed vortex area at the grille net 33 (especially the air outlet side of the outer grille bars 332) is greatly reduced, which is beneficial to reducing the wind resistance and aerodynamic noise at the outlet grille net 33. In addition, when part of the air flows through the gap between the inner grille bars 333 and the outer grille bars 332, an acceleration effect will be generated, thereby increasing the flow speed of the air, which is beneficial to increasing the air outlet volume at the grille net 33, reducing the wind resistance at the outlet grille net 33 and improving the air outlet efficiency.

[0069] In summary, providing a multi-layer serial structure grille mesh 33 spaced apart along the axial direction on the inner side of the positioning portion 31 will not increase the wind resistance of the air outlet grille 3, but will reduce the wind resistance and aerodynamic noise of the air outlet grille 3 to improve the air outlet efficiency.

[0070] It should be noted that in the embodiment of the present application, the positioning portion 31 may be a circular ring structure or an elliptical ring structure, or other frame-shaped structures. As for the outer grille bars 332 and the inner grille bars 333, they may be a circular ring structure or an elliptical ring structure that matches the shape of the positioning portion, or they may be an arc-shaped rib structure, a linear rib structure, or a combination of an arc-shaped rib and a linear rib structure, and this is not limited.

[0071] In some embodiments, Figure 6 As shown, the plurality of inner grille bars 333 may include a plurality of first inner grille bars 3331, a plurality of second inner grille bars 3332, and a plurality of third inner grille bars 3333. Taking the first inner grille bars 3331, the second inner grille bars 3332, and the third inner grille bars 3333 as an annular structure as an example, along the radial direction of the positioning portion 31 from the support portion 32 to the positioning portion 31, the plurality of first inner grille bars 3331, the plurality of third inner grille bars 3333, and the plurality of second inner grille bars 3332 are spaced and distributed in sequence.

[0072] like Figure 6 As shown, along the radial direction of the positioning portion 31, a plurality of first inner grid bars 3331 are arranged close to the support portion 32 and are distributed at intervals, a plurality of second inner grid bars 3332 are arranged close to the positioning portion 31 and are distributed at intervals, and a plurality of third inner grid bars 3333 are located between the first inner grid bars 3331 and the second inner grid bars 3332 and are distributed at intervals.

[0073] For example, in the annular region between the support portion 32 and the positioning portion 31, in the inner annular region, a plurality of first inner grille bars 3331 of annular structures may be distributed at intervals along the radial direction of the positioning portion 31, and the radial dimension of two adjacent first inner grille bars 3331 that is away from the support portion 32 is larger. In the middle annular region, a plurality of third inner grille bars 3333 of annular structures may be distributed at intervals along the radial direction of the positioning portion 31, and in the outer annular region, a plurality of second inner grille bars 3332 of annular structures may be distributed at intervals along the radial direction of the positioning portion 31.

[0074] That is, the multiple first inner grille bars 3331 in the inner ring area can be regarded as multiple concentric ring structures that increase in radial dimension outward (i.e., the direction from the support portion 32 to the positioning portion 31), the multiple third inner grille bars 3333 in the middle ring area can be regarded as multiple concentric ring structures that increase in radial dimension outward, and the multiple second inner grille bars 3332 in the outer ring area can be regarded as multiple concentric ring structures that increase in radial dimension outward. Among them, the multiple first inner grille bars 3331, the multiple second inner grille bars 3332 and the multiple third inner grille bars 3333 are not only different in installation position, but also in different deflection angles of different inner grille bars 333 relative to the axis of the positioning portion 31.

[0075] For example, Figure 6 and Figure 7 As shown, Figure 7 for Figure 3 In the partially enlarged schematic diagram at C in the middle, at a position on the inner side of the positioning portion 31 close to the support portion 32, the outer side (i.e., the air outlet side) edge of the first inner grille bar 3331 can be arranged to be inclined at a first inner angle α1 along the radial direction of the positioning portion 31 toward the direction close to the support portion 32. For example, the length direction of the first inner grille bar 3331 is the direction in which it extends around the support portion 32. In the cross section of the first inner grille bar 3331 perpendicular to its length direction (e.g., Figure 7 As shown in FIG. 1 , the angle formed by the chord length of the first inner grille bar 3331 along its width direction and the Y direction is the first inner angle α1.

[0076] like Figure 6 and Figure 8 As shown, Figure 8 for Figure 3 In the partial enlarged schematic diagram at D in the middle, at a position close to the positioning portion 31 on the inner side of the positioning portion 31, the outer side (i.e., the air outlet side) edge of the second inner grille bar 3332 can be set at a second inner angle α2 along the radial direction of the positioning portion 31 in a direction away from the support portion 32. For example, the length direction of the second inner grille bar 3332 is the extension direction thereof around the support portion 32. In the cross section of the second inner grille bar 3332 perpendicular to its length direction (e.g., Figure 8 As shown in FIG. 1 , the angle formed by the chord length of the second inner grille bar 3332 along its width direction and the Y direction is the second inner angle α2.

[0077] like Figure 6 and Fig. 9 As shown, Fig. 9 for Figure 3In the locally enlarged schematic diagram at point E, at the plurality of third inner grille bars 3333 between the first inner grille bar 3331 and the second inner grille bar 3332, the height direction of the third inner grille bars 3333 can be extended along the Y direction, that is, the third inner grille bars 3333 can be arranged perpendicular to the radial direction of the positioning portion 31.

[0078] Taking the first inner grille bar 3331, the second inner grille bar 3332 and the third inner grille bar 3333 as an example, from the air inlet side to the air outlet side along the Y direction:

[0079] The third inner grid bar 3333 may be approximately an annular structure of a cylindrical side wall.

[0080] The first inner grille bars 3331 may be approximately a bell-mouth structure whose radial dimension gradually increases outward, and an opening angle of the bell-mouth structure relative to its central axis is a first inner angle.

[0081] The second inner grille bars 3332 may be approximately an inverted bell-mouth structure whose radial dimension gradually decreases outward, and an opening angle of the bell-mouth structure in this direction compared to its central axis is a second inner angle.

[0082] Driven by the axial flow fan 2, when the air flows out of the accommodating chamber 11 along the Y direction from the ventilation port 12, between the positioning portion 31 and the supporting portion 32 of the air outlet grille 3: part of the air close to the supporting portion 32 will flow in the direction of the axis close to the positioning portion 31, part of the air close to the positioning portion 31 will flow in the direction of the axis away from the positioning portion 31, and part of the air in the middle area between the above two parts of air will flow approximately parallel to the Y direction.

[0083] Thus, in the area between the support portion 32 and the positioning portion 31, since the air has different flow directions in different areas, the inner grille bars 3331, the second inner grille bars 3332 and the third inner grille bars 3333 are arranged differently, so that the inner grille bars 333 can be arranged along the flow direction of the air at the corresponding positions. That is, when the air flows through the gap between two adjacent inner grille bars 333, the flow direction of the air can be approximately parallel to the setting direction of the inner grille bars 333 on both sides of the gap relative to the Y direction, thereby reducing the wind resistance at the air outlet grille 3, which is conducive to improving the air volume and air outlet efficiency at the air outlet grille 3.

[0084] It should be noted that along the radial dimension of the positioning portion 31, the thickness dimension of the windward edge of the inner grille bar 333 can be set to be smaller, such as the thickness dimension of the windward edge of the inner grille bar 333 gradually decreases from the windward side to the windward side, which is applicable to at least one of the first inner grille bar 3331, the second inner grille bar 3332 and the third inner grille bar 3333. This is beneficial to reduce the air resistance of the inner grille bar 333 on the windward side, and allows the air to quickly flow out along the side wall of the inner grille bar 333.

[0085] Correspondingly, along the radial dimension of the positioning portion 31, the thickness dimension at the air inlet side edge of the outer grille bar 332 can also be set to be smaller, which is applicable to at least one of the first outer grille bar 3321, the second outer grille bar 3322 and the third outer grille bar 3323. In addition, for the air outlet side edge of the outer grille bar 332 and the inner grille bar 333, a thinner radial dimension can also be set, that is, the thickness dimension at the air outlet side edge is gradually increased from the air outlet side to the air inlet side, so that the air can adhere to the side walls of the outer grille bar 332 and the inner grille bar 333 to flow, which is conducive to increasing the flow speed of the air.

[0086] In some embodiments, when a plurality of inner grille bars 333 and a plurality of outer grille bars 332 are arranged, when the grille net 33 includes the first outer grille bar 3321, the second outer grille bar 3322, the third outer grille bar 3323, the first inner grille bar 3331, the second inner grille bar 3332 and the third inner grille bar 3333:

[0087] Along the axial direction of the positioning portion 31, at a first inner grille bar 3331 and a first outer grille bar 3321 arranged adjacently, the ratio of the first outer angle to the first inner angle can be set to be 0.4-0.5 or 0.5-0.6, such as the ratio of the first outer angle to the first inner angle can be 0.5. By setting the first outer grille bar 3321 with a smaller inclined dimension, the air can flow smoothly through the gap between the two adjacent first outer grille bars 3321, and the flow direction of the air can be corrected by the first outer grille bar 3321, so that the flow direction of the air after flowing out from the grille net 33 has a smaller angle with the Y direction or is approximately parallel to the Y direction, which is beneficial to increase the air supply distance of the air blown out at the vent 12 of the outdoor unit 20 and reduce wind resistance.

[0088] If the ratio of the first outer angle to the first inner angle is less than 0.4, the air flow direction changes greatly when passing through the first inner grille bar 3331 and the first outer grille bar 3321, that is, the wind resistance is large. If the ratio of the first outer angle to the first inner angle is greater than 0.6, the angle between the air direction and the central axis when flowing out of the first outer grille bar 3321 is large, which will reduce the air supply distance of the air outlet grille 3.

[0089] Correspondingly, along the axial direction of the positioning portion 31, at a second inner grille bar 3332 and a second outer grille bar 3322 arranged adjacently, the ratio of the second outer angle to the second inner angle can be set to be 0.4-0.5 or 0.5-0.6, such as 0.5. By setting the second outer grille bar 3322 with a smaller inclination, the air can flow smoothly through the gap between the two adjacent second outer grille bars 3322, and the flow direction of the air can be corrected by the second outer grille bar 3321, so that the flow direction of the air after flowing out from the grille net 33 has a smaller angle with the Y direction or is approximately parallel to the Y direction, which is beneficial to increase the air supply distance of the air blown out at the vent 12 of the outdoor unit 20.

[0090] It should be noted that in the above embodiment, the ratio of the second outer angle to the second inner angle is 0.4 to 0.5 or 0.5 to 0.6, and the ratio of the first outer angle to the first inner angle is 0.4 to 0.5 or 0.5 to 0.6. These two conditions can be set separately or simultaneously, and the present application does not impose any restrictions on this.

[0091] In some other embodiments, the first outer angle may be set equal to the first inner angle, and the second outer angle may be set equal to the second inner angle, in which case the wind resistance at the grille 33 may be reduced to the maximum extent, which is beneficial to further increase the air output of the outdoor unit 20. Alternatively, the first outer angle and the second outer angle may be set to zero, so that the air blown out by the grille 33 can flow parallel to the Y direction, which is beneficial to further increase the air supply distance of the outdoor unit 20.

[0092] When the air flows through the area between the support portion 32 and the positioning portion 31 of the grille 33, the flow direction of the air from inside to outside is deviated radially toward the direction close to the central axis (such as the support portion 32) at the position close to the support portion 32, and the flow direction of the air from inside to outside is deviated radially toward the direction away from the central axis (such as the support portion 32) at the position close to the positioning portion 31. From the positioning portion 31 radially inward (close to the support portion 32) and from the support portion 32 radially outward (close to the positioning portion 31), the deviation angle of the air flow gradually decreases, such as part of the air can flow along the Y direction.

[0093] Based on this, at the plurality of first inner grille bars 3331, combined Figure 6, along the radial direction of the positioning portion 31, the first inner angle of the first inner grille bar 3331 away from the support portion 32 can be set to be less than or equal to the first inner angle of the first inner grille bar 3331 close to the support portion 32. That is, along the radial direction from the support portion 32 to the positioning portion 31, the overall first inner angle of the plurality of first inner grille bars 3331 is set in a decreasing trend, and the overall first outer angle of the corresponding plurality of first outer grille bars 3321 can also be set in a decreasing trend, which is used to reduce the wind resistance at the grille net 33 to increase the air volume, and can increase the flow distance of the air to the outside.

[0094] Correspondingly, at the plurality of second inner grille bars 3332, the Figure 6 , along the radial direction of the positioning portion 31, the second inner angle of the second inner grille bars 3332 away from the positioning portion 31 can be set to be less than or equal to the second inner angle of the second inner grille bars 3332 close to the positioning portion 31. That is, along the radial direction from the support portion 32 to the positioning portion 31, the overall second inner angles of the plurality of second inner grille bars 3332 are set in a decreasing trend, and the overall second outer angles of the corresponding plurality of second outer grille bars 3322 can also be set in a decreasing trend, which is used to reduce the wind resistance at the grille net 33 to increase the air volume, and can increase the air flow distance to the outside.

[0095] For example, the first inner angle can be set to be greater than 0° and less than or equal to 30°. If the first inner angle is greater than 30°, the flow direction of the air flowing out of the grille 33 will be more seriously deflected relative to the axial direction, and the air supply distance will be shorter. The inner grille bar 333 at the inner angle of 0° is the second inner grille bar 3332.

[0096] The second inner angle can be set to be greater than 0° and less than or equal to 30°. If the second inner angle is greater than 30°, the flow direction of the air flowing out of the grille mesh 33 will be more seriously deflected outward relative to the axial direction, and the air supply distance will be shorter. The inner grille bar 333 at the inner angle of 0° is the second inner grille bar 3332.

[0097] Correspondingly, the first outer angle can be set to be greater than 0° and less than or equal to 15°. The second outer angle can also be set to be greater than 0° and less than or equal to 15°, which is not limited in the present application.

[0098] In some other embodiments, the grid net 33 may be provided with a plurality of first outer grid bars 3321 , a plurality of second outer grid bars 3322 , a plurality of first inner grid bars 3331 , and a plurality of second inner grid bars 3332 .

[0099] Along the radial direction of the positioning portion 31, at the multiple first inner grille bars 3331 far away from the support portion 32, a first smaller inner angle (such as 0.5° to 2°) can be set, and at the multiple second inner grille bars 3332 far away from the positioning portion 31, a second smaller inner angle (such as 0.5° to 2°) can also be set. In this way, there is no need to arrange multiple third inner grille bars between the first inner grille bars 3331 and the second inner grille bars 3332, and correspondingly, multiple third outer grille bars are not arranged between the first outer grille bars 3321 and the second outer grille bars 3322, which is also conducive to reducing wind resistance and increasing air output and air supply distance, and the structure is simple.

[0100] In some embodiments, multiple outer grille bars 332 and multiple inner grille bars 333 may be arranged one by one along the Y direction, or one inner grille bar 333 may be arranged inside one or more outer grille bars 332 along the radial direction of the positioning portion 31. This is beneficial to reducing the wind resistance and aerodynamic noise of the air outlet grille 3 and improving the air outlet efficiency of the air outlet grille 3, and is not limited to this.

[0101] like Figure 6 As shown, the plurality of outer grille bars 332 are located at the air outlet side of the plurality of inner grille bars 333 along the Y direction and are spaced apart and distributed. The plurality of outer grille bars 332 may include a plurality of first outer grille bars 3321, a plurality of second outer grille bars 3322, and a plurality of third outer grille bars 3323. Taking the first outer grille bars 3321, the second outer grille bars 3322, and the third outer grille bars 3323 as an annular structure as an example, along the radial direction of the positioning portion 31 from the support portion 32 to the positioning portion 31, the plurality of first outer grille bars 3321, the plurality of third outer grille bars 3323, and the plurality of second outer grille bars 3322 are spaced apart and distributed in sequence.

[0102] Illustratively, along the radial direction of the positioning portion 31, a plurality of first outer grille bars 3321 are disposed close to the support portion 32 and are spaced apart, a plurality of second outer grille bars 3322 are disposed close to the positioning portion 31 and are spaced apart, and a plurality of third outer grille bars 3323 are located between the first outer grille bars 3321 and the second outer grille bars 3322 and are spaced apart.

[0103] like Figure 6 and Figure 7 As shown, at a position on the inner side of the positioning portion 31 close to the support portion 32, a plurality of first outer grille bars 3321 may be distributed at intervals along the radial direction of the positioning portion 31. Along the Y direction, the outer side (i.e., the air outlet side) edge of the first outer grille bar 3321 may be inclined at a first outer angle β1 along the radial direction of the positioning portion 31 toward the direction close to the support portion 32. The length direction of the first outer grille bar 3321 is the direction in which it extends around the support portion 32. In the cross section of the first outer grille bar 3321 perpendicular to its length direction (e.g., Figure 7The angle formed by the chord length of the first outer grille bar 3321 along its width direction and the Y direction is the first outer angle β1.

[0104] like Figure 6 and Figure 8 As shown, at a position on the inner side of the positioning portion 31 close to the positioning portion 31, the outer side (i.e., the air outlet side) edge of the second outer grille bar 3322 can be arranged at a second inner angle β2 along the radial direction of the positioning portion 31 in a direction away from the support portion 32. The length direction of the second outer grille bar 3322 is the direction in which it extends around the support portion 32. In the cross section of the second outer grille bar 3322 perpendicular to its length direction (such as Figure 8 (shown)

[0105] The angle formed by the chord length of the second outer grille bar 3322 along the width direction and the Y direction is the second inner angle β2.

[0106] like Figure 6 and Fig. 9 As shown, at the plurality of third outer grille bars 3323 between the first outer grille bar 3321 and the second outer grille bar 3322, the height direction of the third outer grille bars 3323 can be extended along the Y direction, that is, the third outer grille bars 3323 can be arranged perpendicular to the radial direction of the positioning portion 31. At this time, one third inner grille bar 3333 can be aligned with one third outer grille bar 3323 along the Y direction and arranged at intervals.

[0107] Taking the first outer grille bar 3321, the second outer grille bar 3322 and the third outer grille bar 3323 as an example, from the air inlet side to the air outlet side along the Y direction:

[0108] The third outer grid bar 3323 may be approximately a ring-shaped structure of a cylindrical side wall.

[0109] The first outer grille bar 3321 can be approximately a bell-mouth structure whose radial dimension gradually increases outward, and the opening angle of the bell-mouth structure compared to its central axis is a first outer angle.

[0110] The second outer grille bar 3322 can be approximately a reverse bell-mouth structure whose radial dimension gradually decreases outward, and the opening angle of the bell-mouth structure in this direction compared to its central axis is a second outer angle.

[0111] In this way, while the air passes through the inner grille bars 333 and the outer grille bars 332 to separate and accelerate the two flows of air, the inclination angles of the first outer grille bars 3321, the second outer grille bars 3322 and the third outer grille bars 3323 are adapted to match the air flow direction in the corresponding area. That is, when the air flows through the gap between two adjacent outer grille bars 332, the air flow direction can be approximately parallel to the setting direction of the outer grille bars 332 on both sides of the gap relative to the Y direction, thereby reducing the wind resistance at the air outlet grille 3, which is conducive to improving the air volume and air outlet efficiency at the air outlet grille 3.

[0112] In some embodiments, multiple outer grid bars 332 in the grid net 33 can be connected to at least part of the connecting portion 331 to form an outer grid net structure, and multiple inner grid bars 333 can be connected to at least part of the connecting portion 331 to form an inner grid net structure. That is, the grid net 33 can be provided with two layers of connecting portions 331 spaced apart along the Y direction.

[0113] In this way, the inner grille bars 333 in the two-layer grille mesh structure spaced apart along the Y direction can be spaced apart from the corresponding outer grille bars 332, so that the air can be accelerated and the eddy current can be reduced by two flow separations when it flows from the inside to the outside through the inner grille bars 333 and the corresponding outer grille bars 332 in sequence. At the same time, the connecting parts 331 in the two-layer grille mesh structure spaced apart along the Y direction are also spaced apart, so that the air can be accelerated and the eddy current can be reduced by two flow separations when it flows from the inside to the outside through the inner connecting part 331 and the outer connecting part 331 in sequence.

[0114] Or, if Fig.10 As shown, Fig.10 for Figure 3 , a partial enlarged schematic diagram of the grille net 33 near the support portion 32 is shown in FIG. 1 , and along the Y direction, a plurality of connecting portions 331 of a layer structure may also be provided in the grille net 33. Exemplarily, along the Y direction, at least part of the connecting portions 331 may be provided between the outer edge of the outer grille bar 332 and the inner edge of the inner grille bar 333, and the part of the connecting portions 331 may simultaneously support and connect the outer grille bar 332 and the inner grille bar 333 to form a grille net 33 with a double-layer structure.

[0115] In this way, the support of the single-layer structure can be used as the support frame of the double-layer structure grille net 33, which has a simple structure and saves manufacturing materials. In addition, since the connection part 331 is recessed inwardly compared to the outer edge of the outer grille bar 332, and the connection part 331 is recessed outwardly compared to the inner edge of the inner grille bar 333, it can further save manufacturing materials, and the connection part 331 recessed from the outside to the inside can play a role of partial concealment, so as to improve the appearance of the outer side of the grille net 33.

[0116] It should be noted that, for the multiple connection parts 331 distributed in a single layer in the grille net 33, at least some of the connection parts 331 can also be arranged to be located on the inner side of the outer grille bar 332. For example, the outer edge of the connection part 331 is recessed inwardly compared with the outer grille bar 332, and the inner edge of the connection part 331 can be arranged flush with the inner edge of the inner grille bar 333 in the Y direction, so that the connection part 331 can simultaneously support the inner edge of the outer grille bar 332 and the inner grille bar 333, which has a simple structure and can take into account the good appearance of the outer side of the grille net 33.

[0117] Alternatively, the outer edge of the connection portion 331 may be flush with the outer edge of the outer grille bar 332 in the Y direction, and the inner edge of the connection portion 331 may be flush with the inner edge of the inner grille bar 333 in the Y direction, which has a simple structure.

[0118] like Figure 2 As shown, the diameter of the minimum circumscribed circle of the support portion 32 can be defined as the first radial dimension d1, and the diameter of the maximum inscribed circle inside the positioning portion 31 can be defined as the second radial dimension.

[0119] Taking the support portion 32 as a disc-shaped structure as an example, if the diameter of the disc-shaped structure in the Y direction changes gradually, the first radial dimension d1 is the maximum diameter of the disc-shaped structure.

[0120] If a plurality of connecting portions 331 converge and connect near the center of the positioning portion 31 to form a supporting portion 32, the first radial dimension d1 may be zero, or may be regarded as the diameter dimension of the hub of the blade 22. In this case, it may be regarded that the supporting portion 32 is not provided in the positioning portion 31, or it may be regarded that the supporting portion 32 is provided in the positioning portion 31, and this is not limited.

[0121] Exemplarily, in the annular region between the second radial dimension of the positioning portion 31 and the first radial dimension of the support portion 32 (i.e., d1>0), the plurality of outer grille bars 332 and the plurality of inner ring grille bars 333 may be annular structures. If there is additional space between the circular region of the second radial dimension and the positioning portion 31, the partial region may be filled with the second outer grille bars 3322 and the second inner ring grille bars 3333 of the arc-shaped structure and / or the linear structure.

[0122] If the support portion 32 is a disc-shaped structure, then in the area where the circular area of ​​the first radial dimension overlaps with the support portion 32, the first outer grid bars 3321 and the first inner grid bars 3331 of the arc-shaped structure and / or the straight-line structure can fill this partial area.

[0123] If the support portion 32 is formed by a plurality of connecting portions 331 intersecting and connecting each other, the first diameter dimension can be regarded as the diameter dimension of the hub of the fan blade 22, and the circular area within the first diameter dimension can be filled in between by the first outer grille bar 3321 and the first inner grille bar 3331 of the annular structure.

[0124] Based on this, when a plurality of first outer grille bars 3321, a plurality of third outer grille bars 3323 and a plurality of second outer grille bars 3322 are provided on the outer side of the grille net 33, along the radial direction of the positioning portion 31, in the annular region between the first radial dimension and the second radial dimension:

[0125] The maximum ratio of the difference between the diameter dimension of the first outer grille bar 3321 and the first radial dimension to the difference between the second radial dimension and the first radial dimension can be 0.2 to 0.3. That is, the ratio of the difference between the diameter dimension of the first outer grille bar 3321 closest to the positioning portion 31 (periphery) and the first radial dimension to the difference between the second radial dimension and the first radial dimension can be 0.2 to 0.3, which is used to define the arrangement area of ​​the plurality of first outer grille bars 3321, and can be flexibly designed according to the air outlet conditions of the fan blades 22 of the axial flow structure.

[0126] The minimum ratio of the difference between the diameter of the second outer grille bar 3321 and the first radial dimension to the difference between the second radial dimension and the first radial dimension is 0.7 to 0.8. That is, the ratio of the difference between the diameter of the second outer grille bar 3322 closest to the support portion 32 (inner periphery) and the first radial dimension to the difference between the second radial dimension and the first radial dimension can be 0.7 to 0.8, which is used to limit the arrangement area of ​​the plurality of second outer grille bars 3322, and can be flexibly designed according to the air outlet conditions of the fan blades 22 of the axial flow structure.

[0127] Based on this, in the area between the outermost first outer grille bar 3321 and the innermost second outer grille bar 3322, a plurality of third outer grille bars 3323 can be arranged to fill in radial intervals, so that the radial interval size of the grille net 33 meets the relevant standards. In addition, the air flowing out of this area can flow smoothly and quickly along the Y direction.

[0128] For example, along the Y direction, on the inner side of the grille net 33, a first inner grille bar 3331 may be provided corresponding to the inner side of part of the first outer grille bar 3321 and arranged at intervals, a second inner grille bar 3332 may be provided corresponding to the inner side of part of the second outer grille bar 3322 and arranged at intervals, and a third inner grille bar 3332 may be provided corresponding to the inner side of part of the third outer grille bar 3322 and arranged at intervals, which has a simple structure.

[0129] Alternatively, on the inner side of the grille net 33, the first inner grille bars 3331 may correspond to the first outer grille bars 3321 one by one and be arranged at intervals along the Y direction, the third inner grille bars 3333 may correspond to the third outer grille bars 3323 one by one and be arranged at intervals along the Y direction, and the second inner grille bars 3332 may correspond to the second outer grille bars 3322 one by one and be arranged at intervals along the Y direction. This is beneficial to reducing the wind resistance of the air outlet grille 3 and increasing the air supply distance.

[0130] In some embodiments, Fig.10 As shown, in a cross section perpendicular to the length direction of the outer grille bar 332 and the inner grille bar 333:

[0131] The maximum chord length of the outer grille bar 332 at this time is the outer width dimension Lj of the outer grille bar 332, and the angle formed by the width direction of the outer grille bar 332 and the axis (parallel to the Y direction) of the positioning portion 31 is the outer angle β, which includes a first outer angle and a second outer angle. Taking the multiple outer grille bars 332 having equal outer width dimensions as an example, along the Y direction, the outer angles at the first outer grille bar 3321 and the second outer grille bar 3322 are greater than zero (i.e., the corresponding first outer angle and second outer angle), so that the height dimensions of the first outer grille bar 3321 and the second outer grille bar 3322 along the Y direction are smaller than their outer width dimensions, and the height dimension of the third outer grille bar 3323 along the Y direction is equal to its outer width dimension.

[0132] The maximum chord length of the inner grille bar 333 at this time is the inner width dimension Lc of the inner grille bar 333, and the angle formed by the width direction of the inner grille bar 333 and the axis (parallel to the Y direction) of the positioning portion 31 is the inner angle α, and the inner angle α includes a first inner angle and a second inner angle. Taking the multiple inner grille bars 333 having equal inner width dimensions as an example, along the Y direction, the inner angles at the first inner grille bar 3331 and the second inner grille bar 3332 are greater than zero (i.e., the corresponding first inner angle and second inner angle), so that the height dimensions of the first inner grille bar 3331 and the second inner grille bar 3332 along the Y direction are smaller than their inner width dimensions, and the height dimension of the third inner grille bar 3333 along the Y direction is equal to its inner width dimension.

[0133] It should be noted that the inner angle α has different inclination directions at the first inner grille bar 3331 and the second inner grille bar 3331, and the inner angle α has zero inclination direction at the second inner grille bar 3332. Correspondingly, the outer angle β has different inclination directions at the first outer grille bar 3321 and the second outer grille bar 3321, and the outer angle β has zero inclination direction at the second outer grille bar 3322.

[0134] For example, the inner width of the inner grille bar 333 can be set to a value range of 4 mm to 10 mm, and the outer width of the outer grille bar 332 can be set to a value range of 4 mm to 10 mm. For example, the inner width can be equal to the outer width, such as 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, and can be flexibly set according to actual needs.

[0135] If the outer width is less than 4 mm, the bending strength of the outer grille bars 332 is low, which will cause extrusion deformation between two adjacent outer grille bars 332, that is, the gap width increases, and the safety performance is low. If the outer width is greater than 10 mm, it will increase the time for air to flow through the air outlet grille 3 and increase the air outlet resistance.

[0136] Based on this, by setting the outer appearance dimension and the inner width dimension to 4-10 mm, the air outlet grille 3 can have better safety performance and lower wind resistance.

[0137] For example, an inner grille bar is provided on the inner side of an outer grille bar 332. Fig.10 As shown, along the radial direction of the grille mesh 33, the inner edges of two adjacent inner grille bars 333 (i.e. Fig.10 Correspondingly, the inner edges of the two outer grid bars 332 may be arranged to be spaced apart by a third radial dimension along the radial direction of the grid net 33.

[0138] For example, in the annular region between the support portion 32 and the positioning portion 31, N outer grid bars 332 and N inner grid bars 333 may be provided, that is, the third radial dimension Lz = (d2-d1) / N. Exemplarily, according to relevant standards, the value range of the third radial dimension may be set to 8.5 mm to 9.5 mm, so that the grid net 33 can effectively prevent external foreign matter from entering the accommodating cavity 11.

[0139] Continue to refer to Fig.10 Along the Y direction, the ratio of the axial spacing dimension Lp between the outer grid bars 332 and the inner grid bars 333 to the third radial dimension can be set to 0.1-0.2, that is, the gap width between the inner edge of the outer grid bar 332 and the outer edge of the inner grid bar 333 arranged adjacent to each other in the Y direction is Lp.

[0140] If the ratio of the axial spacing dimension to the third radial dimension is less than 0.1, the airflow will not be able to flow out from the inner grille bar 333 and separate. If the ratio of the axial spacing dimension to the third radial dimension is greater than 0.2, a large low-speed separation area (larger resistance) will be formed between the inner grille bar 333 and the outer grille bar 332. Thus, by setting the ratio of the axial spacing dimension to the third radial dimension to 0.1 to 0.2, such as the axial spacing dimension can be 0.85 mm to 1.9 mm, the air can be accelerated and the vortex can be reduced through two flow separations when it flows from the inside to the outside in sequence through the inner grille bar 333 and the corresponding outer grille bar 332, and the effect is better.

[0141] In addition, between an inner grille bar 333 and an outer grille bar 332 that are adjacently distributed along the Y direction, the outer edge of the inner grille bar 333 and the inner edge of the outer grille bar 332 are spaced apart by a fourth radial dimension Ld in the radial direction of the grille net 33. For example, the maximum ratio of the fourth radial dimension to the third radial dimension can be set to 0.2-0.3, so that air can flow smoothly through the grille net.

[0142] Thus, by setting the fourth radial dimension between the inner grille bars 333 and the outer grille bars 332 to be greater than zero, the air is separated from the wall of the inner grille bars 333 from back to front and attached to the wall of the outer grille bars 332. Since a plurality of fine gaps (i.e., gaps of the fourth radial dimension) are generated between the inner grille bars 333 and the outer grille bars 332 along the Y direction, when the fluid flows through the gaps, the flow area becomes smaller, so that the flow velocity increases, that is, it is beneficial to increase the air flow velocity on the air outlet side, thereby increasing the air volume.

[0143] Since the fourth radial dimension is mainly concentrated between the first inner grille bar 3331 and the first outer grille bar 3321 and between the second inner grille bar 3332 and the second outer grille bar 3322, that is, the air flow rate in the inner circle area of ​​the air outlet grille 3 close to the support part 32 and the outer circle area close to the positioning part 31 is faster, the air output increase is larger.

[0144] It should be noted that, along the radial direction of the positioning portion 31 , the axial spacing dimension and the fourth radial dimension between the inner grid bars 333 and the outer grid bars 332 at different positions are not completely the same.

[0145] For example, since the width directions of the third inner grille bars 3333 and the third outer grille bars 3323 are arranged parallel to the Y direction, that is, the inner angle and the outer angle are zero, and one third inner grille bar 3333 can be arranged in alignment with one third outer grille bar 3323 in the Y direction. Based on this, the fourth radial dimension of the third inner grille bars 3333 and the third outer grille bars 3323 adjacent to each other in the Y direction can be zero, if the spacing dimension between the inner edge of the outer grille bar 332 and the inner edge of the inner grille bar 333 in the Y direction is equal to the sum of the long projection length of the inner width dimension Lc in the axial direction and the axial spacing dimension Lp, that is, the axial spacing dimension between the third inner grille bars 3333 and the third outer grille bars 3323 is small and equal in size.

[0146] In the area where the first inner grille bar 3331 and the first outer grille bar 3321 are provided, the fourth radial dimension is greater than zero, and the inner edge of the first outer grille bar 3321 is radially located on the side of the outer edge of the first inner grille bar 3331 close to the support portion 32, so as to facilitate guiding the flow direction of the air to approach the parallel axis. Exemplarily, at the first outer grille bar 3321, it can be set that the larger the first outer angle is, the larger the fourth radial dimension at the corresponding position is, and the larger the first outer angle is, the larger the axial spacing dimension at the corresponding position is.

[0147] Correspondingly, in the area where the second inner grille bar 3332 and the second outer grille bar 3322 are provided, the fourth radial dimension is greater than zero, and the inner edge of the second outer grille bar 3322 is radially located on the side of the outer edge of the second inner grille bar 3332 close to the positioning portion 31, so as to facilitate guiding the flow direction of the air to approach the parallel axis. Exemplarily, at the second outer grille bar 3322, it can be set that the larger the second outer angle is, the larger the fourth radial dimension at the corresponding position is, and the larger the second outer angle is, the larger the axial spacing dimension at the corresponding position is.

[0148] Taking the positioning portion 31 as a circular frame structure and the support portion 32 as a disc structure as an example, in the installation area between the support portion 32 and the positioning portion 31, the 25 outer grille bars 332 of the circular ring structure are arranged at intervals of 8.5 mm to 9.5 mm in the radial direction, and the 25 inner grille bars 333 of the inner ring structure are arranged at intervals of 8.5 mm to 9.5 mm in the radial direction, and the plurality of connecting portions 331 of the linear structure are distributed around the support portion 32 and simultaneously connect the support portion 32, the positioning portion 31, the inner grille bars 333 and the outer grille bars 332. Along the radial direction of the positioning portion 31 from the positioning portion 31 to the support portion 32, the plurality of inner grille bars 333 and the plurality of outer grille bars 332 can be numbered 1 to 25 in sequence.

[0149] Based on this, the inner grille bars 333 numbered 1 to 7 are the second inner grille bars 3332. That is, the second inner angles of the second inner grille bars 3332 numbered 1 to 2 are 20° to 28° (e.g., 24°), the second inner angles of the second inner grille bars 3332 numbered 3 to 4 are 16° to 24° (e.g., 20°), the second inner angles of the second inner grille bars 3332 numbered 5 are 14° to 20° (e.g., 17°), the second inner angles of the second inner grille bars 3332 numbered 6 are 6° to 12° (e.g., 9°), and the second inner angles of the second inner grille bars 3332 numbered 7 are 2° to 6° (e.g., 4°).

[0150] The outer grille bars 332 numbered 1 to 7 are second outer grille bars 3322. That is, the second outer angles of the second outer grille bars 3322 numbered 1 to 2 are 10° to 14° (e.g., 12°), the second outer angles of the second outer grille bars 3322 numbered 3 to 4 are 8° to 12° (e.g., 10°), the second outer angles of the second outer grille bars 3322 numbered 5 are 7° to 10° (e.g., 8.5°), the second outer angles of the second outer grille bars 3322 numbered 6 are 3° to 6° (e.g., 4.5°), and the second outer angles of the second outer grille bars 3322 numbered 7 are 1° to 3° (e.g., 2°).

[0151] The inner grille bars 333 numbered 8 to 18 are third inner grille bars 3332, and the inner angle is 0°. The outer grille bars 332 numbered 8 to 18 are third outer grille bars 3322, and the outer angle is 0°.

[0152] The inner grille bars 333 numbered 19 to 25 are first inner grille bars 3331. The first inner angle of the first inner grille bar 3331 numbered 19 is 2° to 6° (e.g., 4°), the first inner angle of the first inner grille bar 3331 numbered 20 is 6° to 12° (e.g., 9°), the first inner angle of the first inner grille bar 3331 numbered 21 is 14° to 20° (e.g., 17°), the first inner angle of the first inner grille bar 3331 numbered 22 to 23 is 16° to 24° (e.g., 20°), and the first inner angle of the first inner grille bar 3331 numbered 24 to 25 is 20° to 28° (e.g., 24°).

[0153] The outer grille bars 332 numbered 19 to 25 are first outer grille bars 3321. The first outer angle of the first outer grille bar 3321 numbered 19 is 2° to 6° (e.g., 4°), the first outer angle of the first outer grille bar 3321 numbered 20 is 6° to 12° (e.g., 9°), the first outer angle of the first outer grille bar 3321 numbered 21 is 14° to 20° (e.g., 17°), the first outer angle of the first outer grille bars 3321 numbered 22 to 23 is 16° to 24° (e.g., 20°), and the first outer angle of the first outer grille bars 3321 numbered 24 to 25 is 20° to 28° (e.g., 24°).

[0154] Based on this, the outdoor unit 20 provided with the improved air outlet grille 3 is used as an improved group, and the outdoor unit 20 provided with the air outlet grille 3 without a plurality of inner grille bars is used as a control group for simulation.

[0155] At the same speed, the total air volume of the outdoor unit 20 of the improved group is 4649.18m3 / s, the turbulent kinetic energy at the outlet grille 3 is 0.23J / kg, and the wind speed at the outlet of the outlet grille 3 is 3.89m / s. The total air volume of the outdoor unit 20 of the control group is 4536.00m3 / s, the turbulent kinetic energy at the outlet grille 3 is 0.27J / kg, and the wind speed at the outlet of the outlet grille 3 is 3.50m / s.

[0156] The air outlet grille 3 with a multi-layer grille mesh 33 structure can increase the whole machine air volume by 0.29% and increase the average wind speed at the outlet of the air outlet grille 3 by 10.96%, thereby reducing wind resistance and increasing the whole machine air volume. The improved solution can also reduce the turbulent kinetic energy of the air outlet grille 3 by 13.29%, which is conducive to reducing the aerodynamic noise at the air outlet grille 3.

[0157] In addition, through simulation, the following table shows the parameter relationship between the speed, air volume and noise of the blower 2 in the control group and the improved group before and after the improvement. Based on this, the data in Table 1 can be used to make the following Fig.11 The diagram shows the relationship between air volume and noise for the control group and the improved group.

[0158] Table 1

[0159]

[0160] in, Fig.11 The dotted line in the figure is the relationship between the total air volume and noise of the outdoor unit before optimization (i.e., the control group). Fig.11 The solid line in the figure is the relationship between the air volume and noise of the optimized outdoor unit (i.e., the improved group). That is, under the same air volume condition, the optimized solution can reduce the noise by about 1.5dB(A), which is a significant effect.

[0161] It should be noted that in the above embodiment, a multi-layer serial structure grille mesh 33 is provided on the inner side of the positioning portion 31 to achieve the effect of lower wind resistance, noise and a larger air supply distance of the air outlet grille.

[0162] In order to solve the problem of large wind resistance of the air outlet grille to the fan of the air conditioner outdoor unit in the prior art, the grille mesh 33 arranged in a single layer along the axial direction can be used as a basis to reduce wind resistance and thus increase the air volume through technical improvements. Fig.12 As shown, the air outlet grille 3 includes a positioning portion 31 , a supporting portion 32 and a grille mesh 33 . The grille mesh 33 is installed between the positioning portion 31 and the supporting portion 32 , and the grille mesh 33 includes a plurality of connecting portions 331 and a plurality of air outlet grilles 334 .

[0163] Combination Figure 6 and Fig.12 ,because Fig.12 The grid mesh 33 shown in the figure is a single-layer structure in the axial direction, that is, Fig.12 The grid mesh 33 in the Figure 6 The grille net 33 shown in the figure is not provided with a single-layer structure of the inner grille bars 333. Accordingly, the plurality of air outlet grilles 334 may be similar in structure to the plurality of outer grille bars 332.

[0164] A plurality of connection portions 331 are arranged at intervals along the circumference of the positioning portion 31, and a first end of the connection portion 331 is connected to the positioning portion 31, and a second end of the connection portion 331 is located on the inner side of the positioning portion 31; a plurality of air outlet grilles 334 are located on the inner side of the positioning portion 31 and are distributed at intervals, and the air outlet grilles 334 are cross-connected with at least part of the connection portions 331, and a grille network can be formed by connecting the plurality of connection portions 331 and the plurality of air outlet grilles 334.

[0165] When the wind flows through the air outlet grille 3, part of the wind will be blown out from the gaps in the grille to the outside of the casing 1, and part of the wind will be blown onto the connecting portion 331 and the air outlet grille 334, causing the connecting portion 331 and the air outlet grille 334 to form resistance to the flow of wind.

[0166] In order to reduce the wind resistance of the connecting portion 331 and the air outlet grille 334, as shown in FIG. Fig.13 and Fig.14 As shown, the dimension of the air outlet grille 334 in the axial direction of the positioning portion 31 is a first dimension H1, and the dimension of the connecting portion 331 in the axial direction of the positioning portion 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 positioning portion 31 in the radial direction of the positioning portion 31 (such as Fig.12 The ratio of the dimension H3) shown in FIG. 1 is greater than or equal to 0.011 and less than or equal to 0.014.

[0167] When the axial rib 334 is in a circular ring structure, the first dimension H1 is approximately equal to the first radial dimension d1.

[0168] It should be noted that, for the convenience of description, the minimum dimension of the positioning portion 31 in the radial direction of the positioning portion 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.

[0169] The first dimension H1 of the air outlet grille 334 is greater than or equal to 6 mm, which can ensure the demoulding requirements of the air outlet grille 3. On this basis, the ratio of the first dimension H1 of the air outlet grille 334 to the third dimension H3 of the positioning portion 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 connecting portion 331 to the third dimension H3 of the positioning portion 31 is greater than or equal to 0.011 and less than or equal to 0.014. After determining the size of the positioning portion 31, that is, after determining the size of the air outlet grille 3, the height of the air outlet grille 334 and the connecting portion 331 in the axial direction of the positioning portion 31 can be as small as possible, so that the length of the gap in the grille mesh in the axial direction of the positioning portion 31 can be as small as possible.

[0170] 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.

[0171] 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 connecting portion 331 away from the fan 2 is located on the side of the end of the air outlet grille 334 away from the fan 2 close to the fan 2, and the end of the connecting portion 331 close to the fan 2 is located on the side of the end of the air outlet grille 334 close to the fan 2 away from the fan 2.

[0172] 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 connecting portion 331 away from the fan 2 and the end face of the air outlet grille 334 away from the fan 2 is 0.2 mm, and the distance between the end face of the connecting portion 331 close to the fan 2 and the end face of the air outlet grille 334 close to the fan 2 is 0.2 mm.

[0173] Among them, Fig.12 As shown, the support portion 32 may be a fixed disk structure located at the center of the positioning portion 31, such as a fixed disk that is approximately circular, or a fixed disk that is rectangular, square, triangular or other special-shaped structures.

[0174] For example, Fig.15 As shown, the positioning portion 31 may be an elliptical ring, and the supporting portion 32 may be an elliptical shape matching the shape of the positioning portion 31. The connecting portion 331 is arc-shaped, and the first ends of the multiple connecting portions 331 are connected to the positioning portion 31, and the second ends of the multiple connecting portions 331 are connected to the supporting portion 32. A portion of the multiple air outlet grilles 334 is a first air outlet grille 3341, and another portion thereof is a second air outlet grille 3342.

[0175] The first air outlet grille 3341 is an arc-shaped rib, and the second air outlet grille 3342 is an annular rib. The second air outlet grille 3342 and the first air outlet grille 3341 are arranged concentrically.

[0176] The second air outlet grille 3342 is connected to the plurality of connection parts 331, and the portion of the first air outlet grille 3341 located outside the second air outlet grille 3342 is connected to the positioning portion 31 and to a portion of the connection parts 331. The portion of the first air outlet grille 3341 located inside the second air outlet grille 3342 is connected to the support portion 32 and to a portion of the connection parts 331.

[0177] The third dimension H3 of the positioning portion 31 is the length of the short axis of the elliptical ring-shaped positioning portion 31, which can also be regarded as the shortest connecting line length between two points on the outer edge of the positioning portion 31 and its center. In addition, the diameter of the maximum inscribed circle inside the positioning portion 31 is d2, and the diameter of the minimum circumscribed circle of the support portion 32 is d1.

[0178] For example, Fig.16 As shown, the positioning portion 31 is annular, and the supporting portion 32 is circular and is arranged concentrically with the positioning portion 31. The grille net 33 also includes a plurality of partition ribs 335. The partition ribs 335, the air outlet grille 334 and the connecting portion 331 can also be regarded as part of the air outlet grille 3. One end of the partition rib 335 is connected to the positioning portion 31, and the other end of the partition rib 335 is connected to the supporting portion 32, so that a fan-shaped area is formed between two adjacent partition ribs 335.

[0179] The connecting portion 331 is in a straight line shape, one section of the air outlet grille 334 is in a straight line shape, and the other section is in an arc shape, and the plurality of air outlet grilles 334 and the plurality of connecting portions 331 are distributed in a plurality of fan-shaped areas. In a fan-shaped area, the air outlet grille 334 and the connecting portion 331 are cross-connected, and one end of the air outlet grille 334 is connected to the positioning portion 31, and the other end of the air outlet grille 334 is connected to a partition rib 335, the first end of the connecting portion 331 is connected to the positioning portion 31, and the second end of the connecting portion 331 is connected to another partition rib 335.

[0180] The third dimension H3 of the positioning portion 31 is the diameter of the circular positioning portion 31 .

[0181] For example, Fig.17 As shown, the positioning portion 31 is annular, the supporting portion 32 is circular and is arranged concentrically with the positioning portion 31, the connecting portion 331 is linear, and the air outlet grille 334 is annular. Multiple air outlet grilles 334 are arranged concentrically and concentrically with the supporting portion 32, and the multiple air outlet grilles 334 are located between the supporting portion 32 and the positioning portion 31, and the multiple connecting portions 331 extend along the radial direction of the positioning portion 31.

[0182] Combination Fig.17 , one part of the connection part 331 is the first connection part 3311, and the other part is the second connection part 3312. The first end of the first connection part 3311 is connected to the positioning part 31, and the second end of the first connection part 3311 is connected to the support part 32. A plurality of first connection parts 3311 are arranged at intervals along the circumference of the positioning part 31, and the first connection parts 3311 are connected to a plurality of air outlet grilles 334. Three second connection parts 3312 distributed in a triangular shape are arranged between any two adjacent first connection parts 3311, and the second connection parts 3312 are connected to part of the air outlet grilles 334.

[0183] The third dimension H3 of the positioning portion 31 is the diameter of the circular positioning portion 31 .

[0184] For example, Fig.12 As shown, the positioning portion 31 is annular, the supporting portion 32 is circular and is arranged concentrically with the positioning portion 31, and the connecting portion 331 extends along the inner side wall of the positioning portion 31 away from the outer side wall of the positioning portion 31, that is, the connecting portion 331 is linear. Among them, the extending direction of the connecting portion 331 can be consistent with the radial direction of the positioning portion 31, and can also be at a certain angle with the radial direction of the positioning portion 31. For example, the extending direction of the connecting portion 331 can be set to be consistent with the radial direction of the positioning portion 31.

[0185] At this time, the angle between the extension directions of two adjacent connecting portions 331 (such as Fig.18 The angle θ 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 connection portions 331 may be 7°, 8°, 9°, 10°, 11°, etc.

[0186] The included angle between the extending directions of two adjacent connecting portions 331 may be equal or unequal. For example, the included angle between the extending directions of two adjacent connecting portions 331 may be equal, that is, the multiple connecting portions 331 are arranged at equal intervals along the circumference of the positioning portion 31 .

[0187] By making the angle between the extension directions of two adjacent connecting parts 331 within the above-mentioned range, the connecting parts 331 can support the air outlet grille 334 to ensure that the air outlet grille 334 is not easily deformed in its radial direction. When the gap between the air outlet grilles 334 meets the requirements of children's finger testing, the number of connecting parts 331 can be relatively small to avoid too many connecting parts 331 affecting the air outlet volume of the air outlet grille 3, thereby reducing the resistance of the connecting parts 331 to the wind blown out by the fan 2.

[0188] Furthermore, the air outlet grille 334 extends around the circumference of the positioning portion 31 , that is, the air outlet grille 334 is annular; multiple air outlet grilles 334 can be concentrically arranged and concentrically arranged with the positioning portion 31 , and the multiple air outlet grilles 334 are located between the support portion 32 and the positioning portion 31 .

[0189] Since the air outlet grilles 334 are concentrically arranged, the diameter of the air outlet grilles 334 close to the support portion 32 is smaller, and the portion of the air outlet grille 334 located between two adjacent connecting portions 331 has a smaller size in the circumferential direction. It is not necessary to set too many connecting portions 331 at this position so that the air outlet grille 334 can meet the children's finger test requirements at this position. If multiple support strips are connected to all the air outlet grilles 334, the gap between the two adjacent connecting portions 331 will be smaller in the portion close to the support portion 32, which will cause greater resistance to the wind blown out by the fan 2.

[0190] Therefore, the length of some of the connection portions 331 among the plurality of connection portions 331 may be made smaller than the length of other connection portions 331 .

[0191] Specifically, Figure 8 As shown, among the multiple connection parts 331, one part is the third connection part 3313, and the other part is the fourth connection part 3314, the third connection part 3313 and the fourth connection part 3314 extend radially along the positioning part 31, and the first end of the third connection part 3313 and the first end of the fourth connection part 3314 are connected to the positioning part 31, the second end of the third connection part 3313 is connected to the support part 32, and the third connection part 3313 is connected to multiple air outlet grilles 334.

[0192] A fourth connection portion 3314 is located between two adjacent third connection portions 3313, and a distance from the center of the positioning portion 31 to the end surface of the second end of the fourth connection portion 3314 is a first distance L, and the first distance L is greater than a distance from the center of the positioning portion 31 to the end surface of the second end of the third connection portion 3313 (e.g. Figure 8 The distance L1 shown in FIG. 1 , that is, the length of the fourth connection portion 3314 is less than the length of the third connection portion 3313 .

[0193] And make the first distance L and the radius of the positioning portion 31 (such as Figure 8The ratio of the first distance L to the radius of the positioning portion 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 positioning portion 31 may increase as the radius R1 of the positioning portion 31 increases.

[0194] When the radius R1 of the positioning portion 31 is determined, the first distance L is determined by the above ratio, that is, the length of the fourth connection portion 3314 can be determined. At this length, the length of the fourth connection portion 3314 can be relatively short, and the fourth connection portion 3314 can cooperate with the third connection portion 3313 to fix the axial ribs so that the gap between the air outlet grilles 334 meets the requirements of children's finger tests.

[0195] By reducing the length of the fourth connection portion 3314 , the resistance of the fourth connection portion 3314 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 .

[0196] It should be noted that the angle θ between the extension directions of two adjacent connection portions 331 is the angle between the extension direction of the adjacent third connection portion 3313 and the extension direction of the fourth connection portion 3314 .

[0197] On this basis, in order to facilitate the arrangement of the air outlet grilles 334, the radial distance between any two adjacent air outlet grilles 334 can be made the same as the radial distance between the outermost air outlet grilles 334 and the positioning portion 31 among the multiple air outlet grilles 334.

[0198] In this way, the positional relationship between the outermost air outlet grille 334 and the positioning portion 31 can be determined by determining the positional relationship between the outermost air outlet grille 334 among the plurality of air outlet grilles 334 between the positioning portion 31 and the support portion 32. And / or, the positional relationship between the outermost air outlet grille 334 and the positioning portion 31 among the plurality of air outlet grilles 334 between the second end of the fourth connecting portion 3314 and the center of the positioning portion 31 can be determined by determining the positional relationship between the outermost air outlet grille 334 and the positioning portion 31.

[0199] For ease of description, the outermost air outlet grille 334 among the multiple air outlet grilles 334 between the positioning portion 31 and the supporting portion 32 can be named the third air outlet grille 3343, and the outermost air outlet grille 334 among the multiple air outlet grilles 334 between the second end of the fourth connecting portion 3314 and the center of the positioning portion 31 can be named the fourth air outlet grille 3344.

[0200] Specifically, Fig.18As shown, among the plurality of air outlet grilles 334 between the positioning portion 31 and the supporting portion 32, the outermost air outlet grilles 334 (i.e., the third air outlet grilles 3343) are connected to the plurality of connecting portions 331, and for the outermost air outlet grilles 334 (i.e., the third air outlet grilles 3343), the portion between two adjacent connecting portions 331 is the first arc segment 33431.

[0201] It should be noted that two adjacent connection portions 331 refer to the adjacent third connection portion 3313 and the fourth connection portion 3314 .

[0202] The ratio of the arc length of the first arc segment 33431 to the radius R1 of the positioning portion 31 may 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 33431 to the radius R1 of the positioning portion 31 increases as the radius of the positioning portion 31 increases.

[0203] After the radius R1 of the positioning portion 31 is determined, the arc length of the first arc segment 33431 can be determined by the ratio, and since the angle between the extension directions of two adjacent connecting portions 331 is determined, the radius of the first arc segment 33431 can be determined, that is, the radius of the third air outlet grille 3343 can be determined. Thus, the spacing between the third air outlet grille 3343 and the positioning portion 31 can be determined, and thus the spacing between adjacent air outlet grilles 334 can be determined.

[0204] In other embodiments, among the plurality of air outlet grilles 334 between the second end of the fourth connection portion 3314 and the center of the positioning portion 31, the portion of the outermost air outlet grille 334 (i.e., the fourth air outlet grille 3344) located between two adjacent third connection portions 3313 is the second arc segment 33441. The ratio of the arc length of the second arc segment 33441 to the radius R1 of the positioning portion 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 33441 to the radius R1 of the positioning portion 31 increases as the radius R1 of the positioning portion 31 increases.

[0205] In general, among the air outlet grilles 334 located between the second end of the fourth connection portion 3314 and the positioning portion 31, the innermost air outlet grilles 334 are usually connected to the end of the second end of the fourth connection portion 3314. For ease of description, the innermost air outlet grilles 334 located between the second end of the fourth connection portion 3314 and the positioning portion 31 may be named as fifth air outlet grilles 3345.

[0206] Therefore, after the radius R1 of the positioning portion 31 is determined, the arc length of the second arc segment 33441 can be determined by the above ratio, and since the angle between the extension directions of two adjacent connecting portions 331 is determined, the angle between two adjacent third connecting portions 3313 can also be determined. That is, the radius of the second arc segment 33441 can be determined and the radius of the fourth air outlet grille 3344 can be determined. When the length of the fourth connecting portion 3314 is determined, the radius of the fifth air outlet grille 3345 can also be determined, so that the distance between the fourth air outlet grille 3344 and the fifth air outlet grille 3345 can be determined, and then the distance between adjacent air outlet grilles 334 can be determined.

[0207] The spacing between two adjacent air outlet grilles 334 is determined by the ratio of the arc length of the first arc segment 33431 to the radius of the positioning portion 31, and / or the arc length of the second arc segment 33441 to the radius of the positioning portion 31. When the air outlet grilles 3 can meet the finger test requirements of children, the spacing between adjacent air outlet grilles 334 is relatively large, so that the air blown by the fan 2 can flow out from the gap between the adjacent air outlet grilles 334, so as to reduce the resistance of the air outlet grilles 3 to the air blown by the fan 2.

[0208] It should be noted that the connection portion 331 is Fig.17 and Fig.18 Various structural forms are also applicable to Figure 3 In the multi-layer serial structure grid network 33 shown in FIG.

[0209] In some embodiments, when the fan blades 22 in the fan 2 rotate, the air in the accommodating cavity 11 of the housing 1 flows toward the vent 12. The air will rotate to a certain extent as the fan blades 22 rotate, and the air will collide with the side wall of the housing 1 and the air outlet grille 3. As a result, when the air flows to the air outlet grille 3, the air volume at different positions of the air outlet grille 3 is different, and the air outlet direction is also different. Therefore, when the radial dimensions of the plurality of air outlet grilles 334 are set to be consistent, the air volume of the air outlet grille 3 will be affected.

[0210] Based on this, the radial dimensions of the air outlet grilles 334 at different positions can be adjusted according to the air volume and wind direction at different positions of the air outlet grilles 334 .

[0211] Specifically, when the ratio of the radius of the air outlet grille 334 to the first distance L is greater than or equal to 0.28 and less than 0.44, the radial dimension of at least a portion of the air outlet grille 334 gradually decreases in a direction away from the fan 2 .

[0212] It should be noted that if Fig.19As shown, the air outlet grille 334 whose ratio of the radius of the air outlet grille 334 to the first distance L is within the above range can be named as the sixth air outlet grille 3346. Then, the sixth air outlet grille 3346 is usually located near the positioning portion 31, and the opening of the end of the sixth air outlet grille 3346 close to the fan 2 is smaller than the opening of the end of the sixth air outlet grille 3346 away from the fan 2, so that the sixth air outlet grille 3346 can guide the wind flowing to the location of the sixth air outlet grille 3346.

[0213] like Fig. 20 As shown, when the radial dimension of the sixth air outlet grille 3346 is not adjusted, the wind collides with the air outlet grille 3 at the location of the sixth air outlet grille 3346 to generate a larger vortex, thereby causing greater resistance to the wind.

[0214] like Fig.21 As shown, after the sixth air outlet grille 3346 is adjusted according to the above ratio, the vortex generated by the wind at the location of the sixth air outlet grille 3346 is significantly reduced after the sixth air outlet grille 3346 guides the wind, the wind encounters less resistance here and the flow rate is more stable.

[0215] When the ratio of the radius of the air outlet grille 334 to the first distance L is greater than or equal to 0.44 and less than 0.78, the radial dimension of the air outlet grille 334 remains unchanged in the direction away from the fan 2 .

[0216] It should be noted that the air outlet grille 334 whose ratio of the radius of the air outlet grille 334 to the first distance L is within the above range can be named as the seventh air outlet grille 3347. Then, the seventh air outlet grille 3347 is usually located in the middle position between the positioning portion 31 and the supporting portion 32, and the wind flow at this position is relatively gentle, so the radial size of the seventh air outlet grille 3347 does not need to be changed.

[0217] When the ratio of the radius of the air outlet grille 334 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 .

[0218] It should be noted that the air outlet grille 334 whose ratio of the radius of the air outlet grille 334 to the first distance L is within the above range can be named as the eighth air outlet grille 3348. Then, the eighth air outlet grille 3348 is usually located near the support portion 32, and the opening of the end of the eighth air outlet grille 3348 close to the fan 2 is larger than the opening of the end of the eighth air outlet grille 3348 away from the fan 2, so that the eighth air outlet grille 3348 can guide the wind flowing to the position of the eighth air outlet grille 3348.

[0219] like Fig. 22As shown, when the radial dimension of the eighth air outlet grille 3348 is not adjusted, the wind collides more severely with the air outlet grille 3 at the location of the eighth air outlet grille 3348, and generates a larger vortex near the support portion 32, thereby causing greater resistance to the wind.

[0220] like Fig.23 As shown, after the eighth air outlet grille 3348 is adjusted according to the above ratio, the vortex generated by the wind at the location of the eighth air outlet grille 3348 is significantly reduced after the eighth air outlet grille 3348 guides the wind, and the wind encounters less resistance here and the flow rate is more stable.

[0221] It should be noted that, when the ratio of the radius of the air outlet grille 334 to the first distance L is less than 0.28, the radius of the air outlet grille 334 is smaller than the radius of the support portion 32. In this case, only the support portion 32 is provided, and the air outlet grille 334 cannot be provided; and, when the ratio of the radius of the air outlet grille 334 to the first distance L is equal to 0.28, the air outlet grille 334 is fixed to the peripheral wall of the support portion 32.

[0222] On this basis, in order to improve the guiding effect of the air outlet grilles 334 at various positions on the wind flowing to the corresponding positions of the air outlet grilles 3, the projection of the axis of the air outlet grilles 334 on the inner wall surface of the air outlet grilles 334 can be made to be a first straight line segment, that is, the radial size of the sixth air outlet grille 3346 decreases uniformly from the end close to the fan 2 to the end away from the fan 2, and the radial size of the eighth air outlet grille 3348 increases uniformly from the end close to the fan 2 to the end away from the fan 2.

[0223] Specifically, Fig.19 As shown, when the ratio of the radius of the air outlet grille 334 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 air outlet grille 334 is C1=75-160*(R / L), wherein R is the radius of the air outlet grille 334 and L is the first distance.

[0224] It should be noted that, at this time, the first straight line segment is the projection of the axis of the sixth air outlet grille 3346 on the inner wall surface of the sixth air outlet grille 3346 .

[0225] When the ratio of the radius of the air outlet grille 334 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 air outlet grille 334 is 50-64*(R / L).

[0226] It should be noted that, at this time, the first straight line segment is the projection of the axis of the eighth air outlet grille 3348 on the inner wall surface of the eighth air outlet grille 3348 .

[0227] The radial dimensions of the sixth air outlet grille 3346 and the radial dimensions of the eighth air outlet grille 3348 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.

[0228] It should be noted that if Figure 6 and Fig.19 As shown, the sixth air outlet grille 3346 has the same structure as the first outer grille bar 3321 , the seventh air outlet grille 3347 has the same structure as the third outer grille bar 3323 , and the eighth air outlet grille 3348 has the same structure as the second outer grille bar 3322 . Fig.19 In the embodiment shown, the grille mesh 33 formed by three types of air outlet grilles 334 between the positioning portion 31 and the supporting portion 32 is equivalent to Figure 6 In the illustrated embodiment, the grid mesh 33 is formed only by the outer grid bars 332 and the connecting parts 331 .

[0229] Correspondingly, the inclination direction and inclination angle of angle C2 can be referred to Figure 7 The setting scheme of the first external angle β1 shown in FIG. 1 , the inclination direction and inclination angle of the angle C1 can refer to Figure 8 The second outer angle β2 is shown in the setting scheme. And the width direction of the seventh air outlet grille can be arranged parallel to the Y direction, that is, the inclined angle is zero.

[0230] In some embodiments, the connection portion 331 can also guide the wind flowing to the air outlet grille 3. Fig.24 and Fig.25 As shown, the side surfaces of two adjacent connecting portions 331 close to each other are wind guide surfaces 3315, and the wind guide surfaces 3315 are perpendicular to the end surface of the positioning portion 31. At this time, it is suitable for the case where the speed of the fan 2 is relatively low.

[0231] Alternatively, the wind guide surface 3315 includes a first side edge 33151 and a second side edge 33152. In the axial direction (i.e., the Y direction) of the positioning portion 31, the second side edge 33152 is located on the side of the first side edge 33151 away from the fan 2, and along the rotation direction (i.e., the Y direction) of the fan 2. Fig.25 In the direction X), the second side edge 33152 is located on one side of the first side edge 33151.

[0232] That is to say, the wind guide surface 3315 forms a certain angle with the end surface of the positioning portion 31 (such as Fig.25), and the inclination direction of the wind guide surface 3315 relative to the positioning portion 31 is suitable for guiding the wind blown out by the fan 2. Specifically, the angle γ1 between the wind guide surface 3315 and the end surface of the positioning portion 31 is greater than or equal to 80° and less than 90°. For example, the angle between the wind guide surface 3315 and the end surface of the positioning portion 31 can be 80°, 82°, 84°, 85°, 86°, 89°, etc.

[0233] When the angle between the wind guide surface 3315 and the end surface of the positioning portion 31 is within the above range, the wind guide surface 3315 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.

[0234] 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. Fig.24 As shown, the axial dimension of the positioning portion 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.

[0235] If the fourth dimension H4 of the positioning portion 31 is too small, the production difficulty of the positioning portion 31 will be increased, and the strength of the positioning portion 31 will be reduced, so that the positioning portion 31 is easily damaged during use.

[0236] Since the grille mesh is usually fixed to the end of the positioning portion 31 away from the fan 2, the fourth dimension H4 of the positioning portion 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 it hits the grille mesh, which will in turn cause greater resistance to the wind and greater air volume loss.

[0237] When the fourth dimension H4 of the positioning portion 31 is within the above range, the wind resistance of the positioning portion 31 can be relatively small.

[0238] On this basis, if Figure 7 and Fig.26 As shown, a plurality of through holes 311 may be spaced apart on the outer wall of the positioning portion 31 so that the wind flowing to the edge of the air outlet grille 3 flows out through the through holes 311 on the positioning portion 31 to further reduce the resistance of the positioning portion 31 to the wind blown out by the fan 2.

[0239] Specifically, the maximum dimension of the through hole 311 along the axial direction of the positioning portion 31 (eg Fig.26 The ratio of the dimension L2 shown in FIG. 1 to the radius R1 of the positioning portion 31 is greater than or equal to 0.023 and less than or equal to 0.027, and the maximum dimension of the through hole 311 along the circumference of the positioning portion 31 (such as Fig.26The ratio of the dimension L3 shown in FIG. 1 to the radius R1 of the positioning portion 31 is greater than or equal to 0.09 and less than or equal to 0.1.

[0240] It should be noted that the through hole 311 can be a round hole, an elliptical hole, a rectangular hole, a square hole, an irregularly shaped hole, a wavy hole, etc.

[0241] The through hole 311 is a wave-shaped hole, which can make the area of ​​the through hole 311 larger, thereby being more conducive to the wind flowing out of the through hole 311. Alternatively, the through hole 311 can also be a rectangular hole or a square hole, which has a simple structure.

[0242] like Fig. 27 As shown, when no through hole 311 is provided on the outer wall of the positioning portion 31, the wind flowing to the positioning portion 31 is blocked by the positioning portion 31, and thus collides with the positioning portion 31 and the air outlet grille 334 and the connecting portion 331 near the positioning portion 31, thereby affecting the flow velocity of the wind at this location, thereby causing resistance to the flow of the wind at this location.

[0243] like Fig.28 As shown, after the through hole 311 is opened on the positioning portion 31, the impact of the wind flowing to the positioning portion 31 on the positioning portion 31 and the air outlet grille 334 and the connecting portion 331 near the positioning portion 31 is significantly reduced. The flow rate of the wind at this location is also improved, reducing the resistance of the positioning portion 31 to the wind.

[0244] In some embodiments, Figure 1 As shown, the outdoor unit 20 further includes an air guide ring 4, which is disposed in the accommodating cavity 11 and located at the vent 12. The air guide ring 4 is connected to the housing 1 and extends along the circumference of the vent 12. The air guide ring 4 is used to guide the wind blown by the fan 2 to the vent 12 and the air outlet grille 3, so that the wind flows out of the vent 12 and the air outlet grille 3 to the outside of the housing 1.

[0245] In order to make the air guide ring 4 smoothly guide the wind blown by the fan 2 to the air outlet grille 3, and reduce the influence of the air guide ring 4 on the wind blown by the fan 2. Fig.29 As shown, the minimum radial dimension of the air guide ring 4 can be the fifth dimension H5, and the ratio of the third dimension H3 (the minimum dimension of the positioning portion 31 in its radial direction) to the fifth dimension H5 can be greater than or equal to 1 and less than or equal to 1.25.

[0246] It should be noted that the positioning portion 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 .

[0247] The ratio of the third dimension H3 to the fifth dimension H5 is within the above range, and the third dimension H3 of the positioning portion 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 in the process of being guided by the air guide ring 4 and blowing toward the air outlet grille 3, and the wind is not blocked by the air guide ring 4 or the housing 1 before reaching the air outlet grille 3.

[0248] 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 positioning portion 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. The resistance of the positioning portion 31 to the wind can be further reduced, thereby further reducing the resistance of the air outlet grille 3 to the wind blown out of the fan 2.

[0249] 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 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 positioning portion 31 is blown on the grille net and blown out of the housing 1 through the gaps in the grille net. Thereby, the resistance of the positioning portion 31 to the wind is further reduced, so as to further reduce the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0250] 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 positioning portion 31 is blown on the grille net and blown out of the housing 1 through the gaps in the grille net. This further reduces the resistance of the positioning portion 31 to the wind, and further reduces the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0251] 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 positioning portion 31 is blown on the grille net and blown out of the housing 1 through the gaps in the grille net. This further reduces the resistance of the positioning portion 31 to the wind, and further reduces the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0252] As shown in Table 2 below, the size relationship between the air guide ring 4 and the positioning portion 31 is simulated. When the air volume of the air conditioner outdoor unit is 4626m3 / h, the speed of the fan 2 in Scheme 1 is 681rpm, while the speed of the fan 2 in Scheme 2 is 634rpm. To achieve the same air volume (4626m3 / h), the speed of the fan 2 required in Scheme 2 is 47rpm lower than that required in Scheme 1.

[0253] 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 the noise generated by the air-conditioning outdoor unit of Scheme 1.

[0254] In Scheme 1, the fifth dimension H5 of the air guide ring 4 is 616 mm, the third dimension H3 of the positioning portion 31 is 630 mm, the diameter of the maximum 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 axial dimension of the positioning portion 31 (ie, the fourth dimension H4) is 30 mm.

[0255] 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.

[0256] 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. The increase in the third dimension H3 of the positioning portion 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.

[0257] It is understandable that after the wind generated by the fan 2 is guided to the air outlet grille 3 by the air guide ring 4, the resistance of the air outlet grille 3 is reduced, and the air volume loss caused is reduced, thereby increasing the air volume of the air conditioner outdoor unit and thus improving the heat exchange efficiency of the air conditioner outdoor unit.

[0258] Table 2

[0259]

[0260] After improving the relationship between the minimum radial dimension of the positioning portion 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 a smaller air volume loss, and the fan 2 needs to reach a lower speed to obtain the same air volume. As a result, when the air conditioner outdoor unit obtains the same air volume and the same heat exchange efficiency, the noise is also reduced. While increasing the air volume, the noise of the air conditioner outdoor unit is reduced, and the user experience of the air conditioner outdoor unit is improved.

[0261] 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 positioning portion 31 is smaller than the minimum radial dimension of the air guide ring 4, and the positioning portion 31 is disposed at the vent 12, and the size of the vent 12 matches that of the positioning portion 31. Therefore, the minimum radial dimension of the vent 12 is also smaller than the minimum radial dimension of the air guide ring 4.

[0262] When the wind blown by the fan 2 flows toward the air outlet grille 3, part of the wind will blow on the inner wall of the accommodating cavity 11 of the casing 1, and the other part will blow 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 of the wind blown by the fan 2 increases, thereby increasing the air volume loss and reducing the air volume.

[0263] 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 positioning portion 31 is greater than the minimum radial dimension of the air guide ring 4. As the minimum radial dimension of the positioning portion 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 net of the air outlet grille 3 no longer increases, and the amount of air blown to the air outlet grille 3 near the positioning portion 31 no longer decreases, which has no obvious effect on reducing the resistance of the air outlet grille 3 to the wind. In addition, the production cost of the air outlet grille 3 increases and its own strength decreases.

[0264] In some embodiments, Fig.30 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 amount of air blown by the fan 2 to the air outlet grille 3 increases. As a result, after the air 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 air blown by the fan 2 is reduced under the premise of controlling the production cost and ensuring its own strength.

[0265] In some embodiments, Fig.29 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.

[0266] 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. 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.

[0267] 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 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 blades 22 from being too dispersed in the air guide ring 4. Therefore, the wind generated by the blades 22 will not collide too much with the air guide ring 4, the housing 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 less.

[0268] 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.

[0269] 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 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 blades 22 to be too dispersed in the air guide ring 4. As a result, the wind generated by the blades 22 collides too much with the air guide ring 4, the housing 1, and the air outlet grille 3, increasing the resistance to the wind generated by the fan 2 and increasing the air volume loss.

[0270] In some embodiments, Fig.29 and Fig.31 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 housing 1, and the second part 42 is located on the side of the first part 41 away from the housing 1 along the Y direction (i.e., the axial direction), and the radial size of the first part 41 gradually decreases along the direction from the first part 41 to the second part 42.

[0271] 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.

[0272] In some embodiments, the dimension of the first portion 41 in the axial direction of the vent 12 (eg Fig.31 When the dimension M) shown in the figure 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, 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 blowing toward the air outlet grille 3 near the positioning portion 31 will not increase, thereby not increasing the resistance of the air outlet grille 3 to the wind, and thus not increasing the air volume loss.

[0273] The dimension of the first portion 41 in the axial direction of the vent 12 (eg Fig.31When 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. This will increase the amount of wind blowing toward the air outlet grille 3 near the positioning portion 31, increase the resistance of the air outlet grille 3 to the wind, and thus increase the air volume loss.

[0274] In some embodiments, Fig.31 As shown, the first part 41 of the air guide ring 4 forms a circle at the vent 12, and the angle between the normal line of the inner circumference of the first part 41 and the axis of the vent 12 (as shown in FIG. Fig.31 The angle γ2 shown in FIG. 1 is greater than or equal to 75° and less than or equal to 90°. For example, the angle γ2 between the normal line of the inner circumference of the first portion 41 and the axis of the vent 12 may be 75°, 80°, 85°, 90°, etc.

[0275] 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 outdoor unit of the air conditioner. 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 blowing toward the air outlet grille 3 near the positioning part 31 will not increase, and the resistance of the air outlet grille 3 to the wind will not increase, thereby not increasing the loss of air volume.

[0276] When the angle γ2 between the normal of the inner circumferential surface of the first part 41 and the axis of the vent 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 positioning portion 31, increasing the resistance of the air outlet grille 3 to the wind, and thereby increasing the air volume loss.

[0277] When the angle γ2 between the normal of the inner circumference of the first part 41 and the axis of the vent 12 is 90°, the inner circumference of the first part 41 will extend along the axis of the vent 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, that is, reducing the air volume.

[0278] When the angle γ2 between the normal of the inner circumference of the first part 41 and the axis of the vent 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. The inner circumference of the first part 41 concentrates the wind blown by the fan 2 toward the central axis of the vent 12, and the inner circumference of the first part 41 blocks the wind blown by the fan 2, and the wind guide ring 4 increases the resistance to the wind, increases the wind volume loss, and reduces the wind volume.

[0279] In some embodiments, the minimum radial dimension of the second portion 42 is the minimum radial dimension of the air guide ring 4 .

[0280] In some embodiments, Fig.31 As shown, the housing 1 includes a panel 13, and the panel 13 includes a first plate 131, a second plate 132, and a third plate 133 that are sequentially connected along the radial direction of the vent 12. The first plate 131 surrounds the second plate 132, and the second plate 132 surrounds the third plate 133. The third plate 133 is located on a side of the first plate 131 facing the accommodating cavity 11, and the vent 12 is opened on the third plate 133.

[0281] 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 vent 12, the axial size of the air-conditioning outdoor unit at the vent 12 is smaller than the sum of the axial sizes of the positioning portion 31 and the casing 1 at the vent 12, which meets the requirements of the small-volume design of the air-conditioning outdoor unit.

[0282] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0283] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which 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 with a grille, comprising an outdoor unit, characterized in that: include: A housing, wherein a receiving cavity is formed inside the housing, and a vent is formed on a side wall of the housing; A fan is located in the accommodating cavity, and the vent is located at the air outlet side of the fan; and an air outlet grille, the air outlet grille comprising: A positioning part, which is a frame-shaped structure, is disposed close to the vent and connected to the housing; A supporting portion, located inside the positioning portion; and a grille net, the grille net being used for circulating air and comprising: A plurality of connecting parts, which are strip-shaped structures, are located between the supporting part and the positioning part and are spaced around the supporting part, and the supporting part is connected to the positioning part through at least part of the connecting parts; A plurality of outer grille bars are located between the positioning portion and the supporting portion and are spaced apart along the radial direction of the positioning portion, and the plurality of outer grille bars are cross-connected with at least a portion of the connecting portion; and a plurality of inner grille bars, which are located on the air inlet side of the outer grille bars close to the fan and spaced apart from the outer grille bars along the axial direction of the air outlet grille.

2. The air conditioner with a grille according to claim 1, characterized in that: The plurality of inner grille bars include: A plurality of first inner grille bars, along the radial direction of the positioning portion, the plurality of first inner grille bars are arranged close to the support portion and are spaced apart; along the axial direction of the positioning portion, the first inner grille bars are arranged away from the outer edge of the fan and are inclined at a first inner angle along the radial direction of the positioning portion toward a direction close to the support portion; And a plurality of second inner grille bars, along the radial direction of the positioning portion, the plurality of second inner grille bars are arranged close to the positioning portion and distributed at intervals; along the axial direction of the positioning portion, the second inner grille bars are arranged away from the outer edge of the fan and inclined at a second inner angle along the radial direction of the positioning portion toward a direction away from the support portion.

3. The air conditioner with grille according to claim 2, characterized in that: The plurality of outer grille bars include: A plurality of first outer grille bars, wherein the plurality of first outer grille bars are arranged close to the support portion and spaced apart along the radial direction of the positioning portion, and one of the first outer grille bars is spaced apart along the axial direction of the positioning portion on the outer side of one of the first inner grille bars; along the axial direction of the positioning portion, the outer edges of the first outer grille bars are arranged at a first outer angle along the radial direction of the positioning portion toward a direction close to the support portion; And a plurality of second outer grille bars, along the radial direction of the positioning portion, a plurality of the second outer grille bars are arranged close to the positioning portion and are distributed at intervals, and one of the second outer grille bars is arranged at an interval along the axial direction of the positioning portion on the side of one of the second inner grille bars away from the fan; along the axial direction of the positioning portion, the air outlet side of the second outer grille bar is inclined at a second outer angle along the radial direction of the positioning portion toward a direction away from the support portion.

4. The air conditioner with a grille according to claim 3, characterized in that: Along the axial direction of the positioning portion, at one of the first inner grille bars and one of the first outer grille bars arranged adjacent to each other, a ratio of the first outer angle to the first inner angle is 0.4 to 0.5 or 0.5 to 0.6; and / or, Along the axial direction of the positioning portion, at a second inner grille bar and a second outer grille bar that are adjacently arranged, a ratio of the second outer angle to the second inner angle is 0.4 to 0.5 or 0.5 to 0.

6.

5. The air conditioner with grille according to claim 2, characterized in that: Along the radial direction of the positioning portion, the first inner angle of the first inner grille bar away from the supporting portion is less than or equal to the first inner angle of the first inner grille bar close to the supporting portion; and / or, Along the radial direction of the positioning portion, the second inner angle of the second inner grille bars away from the positioning portion is less than or equal to the second inner angle of the second inner grille bars close to the supporting portion; and / or, The first inner angle is greater than 0° and less than or equal to 30°; and / or, The second inner angle is greater than 0° and less than or equal to 30°.

6. The air conditioner with grille according to claim 3, characterized in that: The plurality of inner grille bars further include: A plurality of third inner grille bars, wherein the plurality of third inner grille bars are located between the first inner grille bars and the second inner grille bars along the radial direction of the positioning portion, and the plurality of third inner grille bars are arranged at intervals; the third inner grille bars are arranged perpendicular to the radial direction of the positioning portion; The plurality of outer grille bars further include: A plurality of third outer grille bars are provided, wherein the plurality of third outer grille bars are located between the first outer grille bars and the second outer grille bars along the radial direction of the positioning portion, and the plurality of third outer grille bars are arranged at intervals; the third outer grille bars are arranged perpendicular to the radial direction of the positioning portion, and one of the third inner grille bars is aligned with one of the third outer grille bars along the axial direction of the positioning portion and arranged at intervals.

7. The air conditioner with grille according to claim 6, characterized in that: The plurality of the first outer grille bars, the plurality of the second outer grille bars and the plurality of the third outer grille bars are at least annular structures; Along the radial direction of the positioning portion, the maximum ratio of the difference between the diameter dimension of the first outer grid bar and the first radial dimension to the difference between the second radial dimension and the first radial dimension is 0.2 to 0.3; Along the radial direction of the positioning portion, the minimum ratio of the difference between the diameter of the second outer grid bar and the first radial dimension to the difference between the second radial dimension and the first radial dimension is 0.7 to 0.8; The first radial dimension is the diameter dimension of the minimum circumscribed circle of the support portion, and the second radial dimension is the diameter dimension of the maximum inscribed circle inside the positioning portion.

8. The air conditioner with a grille according to any one of claims 1 to 7, characterized in that: Along the radial direction of the air outlet grille, the inner edges of two adjacent outer grille bars are spaced apart by a third radial dimension; Along the axial direction of the air outlet grille, the ratio of the axial spacing dimension between the outer grille bars and the inner grille bars to the third radial dimension is 0.1 to 0.2; and / or, Along the axial direction of the air outlet grille, an inner grille bar is adjacent to an outer grille bar and is arranged at intervals, the inner grille bar is away from the outer edge of the fan, and is spaced apart from the inner edge of the outer grille bar close to the fan by a fourth radial dimension in the radial direction of the grille net; the maximum ratio of the fourth radial dimension to the third radial dimension is 0.2 to 0.

3.

9. The air conditioner with a grille according to any one of claims 1 to 7, characterized in that: Along the axial direction of the air outlet grille, at least part of the connection portion is located on the inner side of the outer grille bar close to the fan, and one of the connection portions supports and connects the inner edge of the outer grille bar and the inner grille bar.

10. An air conditioner provided with a grille, comprising an outdoor unit, characterized in that: include: A housing, wherein a receiving cavity is formed inside the housing, and a vent is formed on a side wall of the housing; A fan is located in the accommodating cavity, and the vent is located at the air outlet side of the fan; and an air outlet grille, the air outlet grille comprising: A positioning part, which is a frame-shaped structure, is disposed close to the vent and connected to the housing; and a grille net, wherein the grille net is located at the inner side of the positioning portion and connected to the positioning portion, and the grille net is a multi-layer serial structure distributed at intervals along the axial direction of the air outlet grille, and is used for circulating air.

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