Air conditioner outdoor unit and air conditioner system

Abstract

The air conditioner outdoor unit comprises an outdoor unit shell, an axial flow wind wheel and an air outlet mesh enclosure, an air inlet and an air outlet are formed in the outdoor unit shell, the axial flow wind wheel is arranged in the outdoor unit shell and is opposite to the air outlet, and the air outlet mesh enclosure covers the front side of the air outlet and comprises a mesh enclosure part; the mesh enclosure part comprises a first mesh enclosure part and a second mesh enclosure part, the second mesh enclosure part is located on the radial outer side of the first mesh enclosure part, the rib arrangement density of the second mesh enclosure part is larger than that of the first mesh enclosure part, and / or the cross sectional area of at least part of ribs in the second mesh enclosure part is larger than that of the ribs of the first mesh enclosure part. According to the air conditioner outdoor unit, the air outlet mesh enclosure of the air conditioner outdoor unit has good structural strength, air outlet resistance is small, and air outlet noise is low.

Description

Technical Field

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

[0002] In the related art, axial flow fans are widely used. For example, axial flow fans are used in air conditioning systems and other air conditioning equipment to drive air flow. For example, axial flow fans are used in the outdoor unit of the air conditioning system, and an air outlet mesh cover is often provided on the front side cover of the air outlet to prevent the user from directly contacting the axial flow fan and causing personal injury. The air outlet mesh cover is subjected to the impact force of the outlet air flow. In order to reduce the deformation of the air outlet mesh cover under the outlet air flow, it is necessary to make the air outlet mesh cover have better structural strength. However, in order to ensure the structural strength of the air outlet mesh cover, the air outlet mesh cover in the related art greatly reduces the effective air outlet area, increases the air outlet resistance and the air outlet noise. Therefore, how to reduce the air outlet resistance and reduce the air outlet noise of the air outlet mesh cover while making the air outlet mesh cover have better structural strength has become a technical problem that needs to be solved urgently. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an air conditioner outdoor unit having an air outlet grille with good structural strength, low air outlet resistance, and low air outlet noise.

[0004] The present invention also provides an air-conditioning system including the above-mentioned air-conditioning outdoor unit.

[0005] The air conditioner outdoor unit according to the first embodiment of the present invention comprises: an outdoor casing, formed with an air inlet and an air outlet, the air outlet being located on the front side of the outdoor casing; an axial flow fan wheel, arranged in the outdoor casing and opposite to the air outlet, the central axis of the axial flow fan wheel extending in the front-to-back direction; an air outlet mesh cover, which is arranged in the front side of the air outlet and comprises a mesh cover part, the mesh cover part comprises a first mesh cover part and a second mesh cover part, in the radial direction of the axial flow fan wheel, the second mesh cover part is located radially outside the first mesh cover part, the rib arrangement density of the second mesh cover part is greater than the rib arrangement density of the first mesh cover part and / or the cross-sectional area of at least part of the ribs in the second mesh cover part is greater than The cross-sectional area of the ribs of the first mesh cover part; wherein, the projection of the axial flow wind wheel on the reference plane is the first projection, the projection of the second mesh cover part on the reference plane is the second projection, the reference plane is perpendicular to the central axis of the axial flow wind wheel, and on the reference plane, the outer peripheral contour line of the hub of the wind wheel is the hub contour line, and a reference circle is made with the center of the axial flow wind wheel as the center and the radius of the axial flow wind wheel as the radius, the second projection is located between the hub contour line and the reference circle, and in the radial direction of the axial flow wind wheel, the radial spacing between the second projection and the hub contour line is f1, the radial spacing between the reference circle and the hub contour line is f2, and f1 / f2>1 / 2.

[0006] According to the air-conditioning outdoor unit of an embodiment of the present invention, in the axial projection direction of the axial flow fan wheel, the rib arrangement density and / or rib cross-sectional area of the second mesh cover part corresponding to the area of the axial flow fan wheel with weaker working capacity in the air outlet mesh cover are set to be larger, and the rib arrangement density and / or rib cross-sectional area of the first mesh cover part corresponding to the area of the axial flow fan wheel with stronger working capacity in the air outlet mesh cover are set to be smaller. Since the rib arrangement density and / or rib cross-sectional area of the first mesh cover part are set to be smaller, the first mesh cover part has less obstruction to the air outlet and less wind resistance. Although the rib arrangement density and / or rib cross-sectional area of the second mesh cover part are set to be larger, since the second mesh cover part corresponds to the area of the axial flow fan wheel with weaker workmanship, it has less impact on the air outlet of the axial flow fan wheel, thereby making the overall structural strength of the air outlet mesh cover higher, and the overall obstruction to the air outlet is smaller, and the wind resistance and wind noise can be reduced.

[0007] According to some embodiments of the present invention, the mesh cover portion includes a plurality of circumferential ribs and a plurality of radial ribs, the plurality of circumferential ribs are arranged at intervals along the radial direction of the axial flow wind wheel, the circumferential ribs extend along the circumference of the axial flow wind wheel, the radial ribs are arranged to intersect with the circumferential ribs, the arrangement density of the circumferential ribs of the second mesh cover portion is greater than the arrangement density of the circumferential ribs of the first mesh cover portion and / or the cross-sectional area of at least part of the circumferential ribs in the second mesh cover portion is greater than the cross-sectional area of the circumferential ribs of the first mesh cover portion.

[0008] According to some embodiments of the present invention, the plurality of circumferential ribs include first circumferential ribs and second circumferential ribs, the first mesh cover portion includes multiple first circumferential ribs, the second mesh cover portion includes at least one second circumferential rib, and the cross-sectional area of the second circumferential rib is greater than the cross-sectional area of the first circumferential rib.

[0009] According to some embodiments of the present invention, a ratio of a cross-sectional area of the second circumferential rib to a cross-sectional area of the first circumferential rib is greater than or equal to 1.8.

[0010] According to some embodiments of the present invention, a ratio of a cross-sectional area of the second circumferential rib to a cross-sectional area of the first circumferential rib is less than or equal to 15.

[0011] According to some embodiments of the present invention, the thickness dimension of the first circumferential rib in the circumferential direction of the circumferential rib is t1, the thickness dimension of the second circumferential rib in the circumferential direction of the circumferential rib is t2, and t2 / t1≥1.5.

[0012] According to some embodiments of the present invention, t2 / t1≤5.

[0013] According to some embodiments of the present invention, the height dimension of the first circumferential rib in the axial direction of the axial flow wind wheel is h1, the height dimension of the second circumferential rib in the axial direction of the axial flow wind wheel is h2, and h2 / h1≥1.2.

[0014] According to some embodiments of the present invention, h2 / h1≤3.

[0015] According to some embodiments of the present invention, the radiating ribs include a first rib segment located in the first mesh cover part and a second rib segment located in the second mesh cover part, the cross-sectional area of the second rib segment is greater than the cross-sectional area of the first rib segment and / or the arrangement density of the second rib segment is greater than the arrangement density of the first rib segment.

[0016] According to some embodiments of the present invention, the arrangement density of the circumferential ribs is greater than the arrangement density of the radial ribs.

[0017] According to some embodiments of the present invention, the mesh cover part also includes a third mesh cover part, and in the radial direction of the axial flow wind wheel, the third mesh cover part is located radially outside the second mesh cover part, and the projection of the third mesh cover part on the reference plane is a third projection, and at least part of the third projection is located radially outside the reference circle; wherein, the rib arrangement density of the second mesh cover part is greater than the rib arrangement density of the third mesh cover part and / or the cross-sectional area of at least part of the ribs in the second mesh cover part is greater than the cross-sectional area of the ribs of the third mesh cover part.

[0018] According to some embodiments of the present invention, a notch is formed on the trailing edge of the blade of the axial flow wind wheel, the projection of the notch on the reference plane is a fourth projection, and the second projection at least partially overlaps with the fourth projection.

[0019] According to some embodiments of the present invention, the second projection includes an inner contour line and an outer contour line arranged opposite to each other along the radial direction of the axial flow wind wheel, and both the inner contour line and the outer contour line intersect with the fourth projection.

[0020] An air conditioning system according to a second embodiment of the present invention includes: an air conditioning outdoor unit according to the first embodiment of the present invention.

[0021] According to the air conditioning system of the embodiment of the present invention, by being provided with the above-mentioned air conditioning outdoor unit, the air outlet grille of the air conditioning outdoor unit has good structural strength, small air outlet resistance and low air outlet noise, which can improve the overall performance of the air conditioning system.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 is a schematic diagram of an air conditioner outdoor unit according to some embodiments of the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of the coordination of the front panel, air outlet grille and axial flow fan wheel of the air conditioner outdoor unit;

[0026] Figure 3 yes Figure 2 A schematic diagram showing the coordination of the front panel, air outlet grille and axial flow fan wheel of the air conditioner outdoor unit from another angle;

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 yes Figure 2 Schematic diagram of the coordination between the axial flow fan wheel and the air outlet grille in the outdoor unit of the air conditioner;

[0029] Figure 6 yes Figure 5 A three-dimensional schematic diagram of the air outlet grille;

[0030] Figure 7 yes Figure 6Enlarged view of point B in the middle;

[0031] Figure 8 yes Figure 6 Schematic diagram of the air outlet grille;

[0032] Figure 9 yes Figure 8 Cross-sectional view along CC line;

[0033] Figure 10 yes Figure 9 Enlarged view of point D in the middle.

[0034] Reference numerals:

[0035] 100. Air conditioner outdoor unit;

[0036] 1. Outdoor housing; 11. Air outlet; 12. Front panel;

[0037] 2. Axial flow rotor; 201. Hub; 202. Blades; 21. Trailing edge; 211. Notch; 22. Leading edge; 23. Blade tip; 24. Blade root;

[0038] 3. Air outlet mesh cover; 301. Outer frame; 302. Mesh cover portion; 303. Circumferential ribs; 31. First mesh cover portion; 311. First circumferential ribs; 32. Second mesh cover portion; 321. Second circumferential ribs; 33. Third mesh cover portion; 331. Third circumferential ribs; 34. Radial ribs; 341. First rib segment; 342. Second rib segment. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0040] Reference below Figures 1-10 An air conditioner outdoor unit 100 according to an embodiment of the present invention will be described.

[0041] Reference Figures 1-4 An air conditioner outdoor unit 100 according to a first embodiment of the present invention includes an outdoor housing 1, an axial flow fan 2, and an air outlet grille 3. The outdoor housing 1 is formed with an air inlet and an air outlet 11. The air outlet 11 is located on the front side of the outdoor housing 1. The air outlet grille 3 is disposed in front of the air outlet 11. The axial flow fan 2 is disposed within the outdoor housing 1 and is arranged opposite the air outlet 11. The central axis of the axial flow fan 2 extends in the front-to-back direction. For example, the outdoor housing 1 includes a front panel 12, on which the air outlet 11 is formed.

[0042] For example, the air conditioner outdoor unit 100 includes the aforementioned outdoor housing 1, the axial flow impeller 2, the air outlet mesh cover 3, the outdoor heat exchanger, and the compressor assembly. A central partition may be provided within the indoor housing to divide the space within the outdoor housing 1 into a first chamber and a second chamber arranged in the left-right direction. The outdoor heat exchanger and the axial flow impeller 2 are disposed within the first chamber, which is connected to the air inlet and the air outlet 11. The compressor assembly is disposed within the second chamber. When the air conditioner outdoor unit 100 is operating, the axial flow impeller 2 drives external air into the outdoor housing 1 through the air inlet to exchange heat with the outdoor heat exchanger. The heat-exchanged air flows toward the air outlet 11 and is then discharged to the outside of the air conditioner outdoor unit 100 through the air outlet 11 and the air outlet mesh cover 3.

[0043] By arranging the air outlet mesh cover 3 in front of the air outlet 11, the possibility of external debris entering the outdoor housing 1 through the air outlet 11 can be reduced, and the possibility of safety accidents caused by contact between people and the axial flow fan wheel 2 can be avoided.

[0044] The air outlet mesh cover 3 includes a mesh cover portion 302 having a plurality of mesh holes formed therein. The mesh cover portion 302 is a hollow structure for the airflow to pass through. The air outlet mesh cover 3 may further include an outer frame 301, which is located on the outer periphery of the mesh cover portion 302. Optionally, the air outlet mesh cover 3 may be square or circular in shape.

[0045] The mesh cover portion 302 includes a first mesh cover portion 31 and a second mesh cover portion 32. In the radial direction of the axial flow wind wheel 2, the second mesh cover portion 32 is located radially outside the first mesh cover portion 31. The rib arrangement density of the second mesh cover portion 32 is greater than the rib arrangement density of the first mesh cover portion 31 and / or the cross-sectional area of at least part of the ribs in the second mesh cover portion 32 is greater than the cross-sectional area of the ribs of the first mesh cover portion 31. The rib arrangement density of the second mesh cover part 32 is greater than the rib arrangement density of the first mesh cover part 31 and / or the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the first mesh cover part 31, including the following three situations: for example, the rib arrangement density of the second mesh cover part 32 is greater than the rib arrangement density of the first mesh cover part 31; for example, the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the first mesh cover part 31; for example, the rib arrangement density of the second mesh cover part 32 is greater than the rib arrangement density of the first mesh cover part 31 and the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the first mesh cover part 31.

[0046] Among them, the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the first mesh cover part 31, which may include the following situations: for example, the cross-sectional area of some of the ribs in the second mesh cover part 32 may be greater than the cross-sectional area of each rib in the first mesh cover part 31; for another example, the cross-sectional area of each rib in the second mesh cover part 32 may be greater than the cross-sectional area of each rib in the first mesh cover part 31.

[0047] By increasing the density of the ribs in some areas of the air outlet mesh cover 3 and / or increasing the cross-sectional area of the ribs, and at the same time decreasing the density of the ribs in some areas of the air outlet mesh cover 3 and / or decreasing the cross-sectional area of the ribs, the overall structural strength of the air outlet mesh cover 3 can be increased, allowing the air outlet mesh cover 3 to withstand the long-term impact of high-speed airflow, so that the air outlet mesh cover 3 can be more stably and reliably installed on the air outlet 11, avoiding safety accidents caused by damage to the air outlet mesh cover 3. In addition, the air outlet mesh cover 3 as a whole can block less air outlet area, reduce air outlet resistance, and reduce air outlet noise.

[0048] Moreover, since the second mesh cover part 32 with a larger rib density and / or a larger rib cross-sectional area is closer to the outer peripheral side of the air outlet mesh cover 3 relative to the first mesh cover part 31 with a smaller rib density and / or a larger rib cross-sectional area, the second mesh cover part 32 can more effectively improve the structural strength of the air outlet mesh cover 3.

[0049] The projection of the axial-flow wind rotor 2 on the reference plane is the first projection, and the projection of the second mesh cover portion 32 on the reference plane is the second projection. The reference plane is perpendicular to the central axis of the axial-flow wind rotor 2. On the reference plane, the outer peripheral contour line of the hub 201 of the wind rotor is the hub 201 contour line. A reference circle is formed with the center of the axial-flow wind rotor 2 as the center o and the radius of the axial-flow wind rotor 2 as the radius. The second projection is located between the hub 201 contour line and the reference circle. In the radial direction of the axial-flow wind rotor 2, the radial spacing between the second projection and the hub 201 contour line is f1, and the radial spacing between the reference circle and the hub 201 contour line is f2, where f1 / f2>1 / 2. For example, the value of f1 / f2 can be 2 / 3, 3 / 4, 4 / 5, 6 / 7, etc.

[0050] For example, the axial-flow wind rotor 2 includes a hub 201 and a plurality of blades 202. The plurality of blades 202 are connected to the outer peripheral wall of the hub 201 and are spaced apart along the circumference of the hub 201. The contour edge of the blade 202 includes a leading edge 22, a tip 23, a trailing edge 21, and a root 24, which are connected end to end. The root 24 is connected to the hub 201. In the rotation direction of the axial-flow wind rotor 2, the leading edge 22 is located in front of the trailing edge 21.

[0051] When the axial-flow rotor 2 is operating, air flows in from the leading edge 22 and out from the trailing edge 21. That is, the airflow first contacts the blade 202 at the leading edge 22, and the airflow last exits the blade 202 at the trailing edge 21. The inlet direction refers to the incoming direction of the airflow, and the outlet direction refers to the outgoing direction of the airflow. The blade tip 23 refers to the radial boundary of the axial-flow rotor 2, where the blade 202 is away from the hub 201. The positive pressure side is the side of the blade 202 facing the outlet direction, and the negative pressure side is the side of the blade 202 facing the inlet direction. The negative pressure side is located upstream of the positive pressure side.

[0052] Among them, the area in the blade 202 that does weaker work or does negative work is usually called an inefficient area. The inefficient area refers to the area of the blade 202 close to the trailing edge 21 and the blade top 23, where vortices and backflows may be generated. This area will produce a negative pressure area, thereby doing negative work, consuming the positive work done by the blade top 23 and the trailing edge 21, and increasing the energy loss of the blade 202.

[0053] By making the ratio f1 / f2 greater than 1 / 2, at least a portion of the second mesh cover portion 32 can correspond to the inefficient area of the axial flow wind wheel 2 in the axial projection direction of the axial flow wind wheel 2. In this way, the area with a larger rib arrangement density and / or a larger cross-sectional area of the ribs in the air outlet mesh cover 3 can correspond to the inefficient area of the axial flow wind wheel 2. While making the air outlet mesh cover 3 have a stronger structural strength, the influence of the second mesh cover portion 32 on the overall air outlet efficiency of the air outlet 11 can be reduced.

[0054] Moreover, the rib arrangement density and / or rib cross-sectional area of the first mesh cover portion 31 in the air outlet mesh cover 3 corresponding to the area with stronger working capacity of the axial flow wind wheel 2 are set smaller. Since the rib arrangement density and / or rib cross-sectional area of the first mesh cover portion 31 are set smaller, the first mesh cover portion 31 has less obstruction to the air outlet and has less air outlet resistance.

[0055] According to the air-conditioning outdoor unit 100 of an embodiment of the present invention, in the axial projection direction of the axial flow fan wheel 2, the rib arrangement density and / or rib cross-sectional area of the second mesh cover part 32 of the air outlet mesh cover 3 corresponding to the area of the axial flow fan wheel 2 with weaker work capacity is set to be larger, and the rib arrangement density and / or rib cross-sectional area of the first mesh cover part 31 of the air outlet mesh cover 3 corresponding to the area of the axial flow fan wheel 2 with stronger work capacity is set to be smaller. Since the rib arrangement density and / or rib cross-sectional area of the first mesh cover part 31 are set to be smaller, the first mesh cover part 31 has less obstruction to air outlet and less wind resistance. Although the rib arrangement density and / or rib cross-sectional area of the second mesh cover part 32 are set to be larger, since the second mesh cover part 32 corresponds to the area of the axial flow fan wheel 2 with weaker workmanship, it has less impact on the air outlet of the axial flow fan wheel 2, thereby making the overall structural strength of the air outlet mesh cover 3 higher, and the overall obstruction to air outlet is smaller, and the wind resistance and wind noise can be reduced.

[0056] Reference Figure 2-Figure 5 According to some embodiments of the present invention, the mesh cover portion 302 includes a plurality of circumferential ribs 303 and a plurality of radial ribs 34. The plurality of circumferential ribs 303 are arranged at intervals along the radial direction of the axial flow wind wheel 2. The circumferential ribs 303 extend circumferentially along the axial flow wind wheel 2. The radial ribs 34 are arranged to intersect with the circumferential ribs 303. The radial ribs 34 and the circumferential ribs 303 are arranged to intersect to form a grid structure. This can enhance the overall structural strength of the air outlet mesh cover 3 and can also reduce or avoid contact between the human body and the axial flow wind wheel 2, especially the possibility of safety accidents caused by fingers extending from the gaps between the ribs of the air outlet mesh cover 3 and contacting the axial flow wind wheel 2.

[0057] The arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than that of the first mesh cover part 31 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than that of the first mesh cover part 31. The arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than the arrangement density of the circumferential ribs 303 of the first mesh cover part 31 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 of the first mesh cover part 31, which may include the following three situations: for example, the arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than the arrangement density of the circumferential ribs 303 of the first mesh cover part 31; for example, the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 of the first mesh cover part 31; for example, the arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than the arrangement density of the circumferential ribs 303 of the first mesh cover part 31, and the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 of the first mesh cover part 31.

[0058] Among them, the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 in the first mesh cover part 31, which may include the following situations: for example, the cross-sectional area of some of the circumferential ribs 303 in the second mesh cover part 32 may be greater than the cross-sectional area of each circumferential rib 303 in the first mesh cover part 31; for another example, the cross-sectional area of each circumferential rib 303 in the second mesh cover part 32 may be greater than the cross-sectional area of each circumferential rib 303 in the first mesh cover part 31.

[0059] For example, the circumferential ribs 303 may be circular or arc-shaped.

[0060] By making the arrangement density of the circumferential ribs 303 of the second mesh cover part 32 greater than the arrangement density of the circumferential ribs 303 of the first mesh cover part 31 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 greater than the cross-sectional area of the circumferential ribs 303 of the first mesh cover part 31, the circumferential ribs 303 extend circumferentially along the air outlet mesh cover 3, so that the circumferential ribs 303 in the second mesh cover part 32 can more effectively enhance the structural strength of the air outlet mesh cover 3, and during the rotation of the axial flow wind wheel 2, the inefficient area of the blades 202 of the axial flow wind wheel 2 will also form an annular area, which can also better reduce the influence of the second mesh cover part 32 on the air outlet efficiency of the axial flow wind wheel 2, which is beneficial to reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3.

[0061] Reference Figure 3-Figure 7 According to some embodiments of the present invention, the plurality of circumferential ribs 303 include a first circumferential rib 311 and a second circumferential rib 321. The first mesh cover portion 31 includes a plurality of first circumferential ribs 311, and the second mesh cover portion 32 includes at least one second circumferential rib 321. The cross-sectional area of the second circumferential rib 321 is greater than the cross-sectional area of the first circumferential rib 311. The smaller cross-sectional area of the first circumferential rib 311 can effectively reduce the area of airflow blocked by the first mesh cover portion 31, thereby reducing the flow resistance and noise of airflow in the first mesh cover portion 31. Furthermore, the larger cross-sectional area of the second circumferential rib 321 can provide the second circumferential rib 321 with greater structural strength, thereby ensuring that the second mesh cover portion 32 has a stronger structural strength, and thus ensuring that the air outlet mesh cover 3 as a whole has a stronger structural strength.

[0062] Reference Figures 6-10According to some embodiments of the present invention, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 is greater than or equal to 1.8. For example, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 can be 1.8, 1.9, 2.0, 2.1, 2.2, etc. By making the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 greater than or equal to 1.8, the cross-sectional area of the first circumferential rib 311 can be smaller, thereby effectively reducing the airflow blocking area of the first mesh cover portion 31, thereby reducing the airflow resistance and airflow noise of the air outlet mesh cover 3; furthermore, the cross-sectional area of the second circumferential rib 321 can be larger to ensure that the second mesh cover portion 32 has a stronger structural strength, thereby making the air outlet mesh cover 3 as a whole have a stronger structural strength.

[0063] Reference Figures 6-10 According to some embodiments of the present invention, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 is less than or equal to 15. For example, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 can be 5, 8, 10, 13, 15, etc. By making the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 less than or equal to 15, while increasing the cross-sectional area of the second circumferential rib 321 to improve the structural strength of the air outlet grille 3, the effect of the second circumferential rib 321 on the air outlet resistance can also be taken into account, thereby reducing the air outlet resistance of the second circumferential rib 321.

[0064] Reference Figures 6-10 According to some embodiments of the present invention, the thickness of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 is t1, the thickness of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 is t2, and t2 / t1 ≥ 1.5. For example, the ratio of the thickness t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness t1 of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 can be 1.5, 2.0, 2.5, 3.0, 3.5, 5, etc. By making the ratio of the thickness dimension t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness dimension t1 of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 greater than or equal to 1.5, the thickness dimension of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 can be smaller, so as to effectively reduce the area of airflow obstruction, thereby reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3, and the thickness dimension of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 can also be larger, so as to ensure that the second mesh cover part 32 has a stronger structural strength, so that the air outlet mesh cover 3 as a whole has a stronger structural strength.

[0065] Reference Figures 6-10 According to some embodiments of the present invention, t2 / t1 ≤ 5. For example, the ratio of the thickness dimension t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness dimension t1 of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 can be 1.5, 2.0, 2.5, 3.0, 3.5, 5, etc. By ensuring that the ratio of the thickness dimension t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness dimension t1 of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 is less than or equal to 5, the thickness dimension of the second circumferential rib 321 is increased to improve the structural strength of the air outlet grille 3 while also taking into account the effect of the second circumferential rib 321 on the air outlet resistance, thereby reducing the air outlet resistance of the second circumferential rib 321.

[0066] Reference Figures 6-10 According to some embodiments of the present invention, the height dimension of the first circumferential rib 311 in the axial direction of the axial flow rotor 2 is h1, the height dimension of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 is h2, and h2 / h1 ≥ 1.2. For example, the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 to the height dimension h1 of the first circumferential rib 311 in the axial direction of the axial flow rotor 2 can be 1.2, 1.5, 2.0, 2.5, 3.0, etc. By making the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow wind wheel 2 to the height dimension h1 of the first circumferential rib 311 in the axial direction of the axial flow wind wheel 2 greater than or equal to 1.2, the height dimension of the first circumferential rib 311 in the axial direction of the axial flow wind wheel 2 can be smaller, and the cross-sectional area of the first circumferential rib 311 can be smaller, so as to effectively reduce the area of the airflow blocked by the first circumferential rib 311, thereby reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3, and also making the height dimension of the second circumferential rib 321 in the axial direction of the axial flow wind wheel 2 larger, so as to make the cross-sectional area of the second circumferential rib 321 larger, so as to ensure that the second mesh cover part 32 has a stronger structural strength, thereby making the air outlet mesh cover 3 as a whole have a stronger structural strength.

[0067] Reference Figures 6-10According to some embodiments of the present invention, h2 / h1 ≤ 3. For example, the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 to the height dimension h1 of the first circumferential rib 311 in the axial direction of the axial flow rotor 2 can be 1.2, 1.5, 2.0, 2.5, 3.0, etc. By ensuring that the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 to the height dimension h1 of the first circumferential rib 311 in the axial direction of the axial flow rotor 2 is less than or equal to 3, the height dimension of the second circumferential rib 321 is increased to improve the structural strength of the air outlet grille 3 while also taking into account the effect of the second circumferential rib 321 on the air outlet resistance, thereby reducing the air outlet resistance of the second circumferential rib 321. Furthermore, the possibility of eddy currents generated due to an excessively large height difference between the first circumferential rib 311 and the second circumferential rib 321 can be reduced.

[0068] Reference Figures 6-10 According to some embodiments of the present invention, the radiating ribs 34 include a first rib segment 341 located in the first mesh cover portion 31 and a second rib segment 342 located in the second mesh cover portion 32. The cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the first rib segment 341 and / or the arrangement density of the second rib segment 342 is greater than the arrangement density of the first rib segment 341. The cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the first rib segment 341 and / or the arrangement density of the second rib segment 342 is greater than the arrangement density of the first rib segment 341 may include the following situations: for example, the cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the first rib segment 341; for example, the arrangement density of the second rib segment 342 is greater than the arrangement density of the first rib segment 341; for example, the cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the first rib segment 341, and the arrangement density of the second rib segment 342 is greater than the arrangement density of the first rib segment 341.

[0069] By making the arrangement density of the second rib segments 342 in the radiating ribs 34 located in the second mesh cover part 32 greater than the arrangement density of the first rib segments 341 in the radiating ribs 34 located in the first mesh cover part 31 and / or making the cross-sectional area of the second rib segments 342 in the radiating ribs 34 located in the second mesh cover part 32 greater than the cross-sectional area of the first rib segments 341 in the radiating ribs 34 located in the first mesh cover part 31, the structural strength of the air outlet mesh cover 3 can be further enhanced, and this is conducive to reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3.

[0070] According to some embodiments of the present invention, the arrangement density of the circumferential ribs 303 is greater than the arrangement density of the radial ribs 34. By making the arrangement density of the circumferential ribs 303 greater than the arrangement density of the radial ribs 34, the circumferential ribs 303 extend along the circumference of the air outlet mesh 3, thereby more effectively enhancing the overall structural strength of the air outlet mesh 3. Furthermore, the wind resistance to the rotating airflow flow field formed during the rotation of the axial flow impeller 2 is relatively small, which helps further reduce air outlet noise. Furthermore, while the arrangement density of the circumferential ribs 303 is greater than the arrangement density of the radial ribs 34, the arrangement density and / or cross-sectional area of the first circumferential ribs 311 in the first mesh cover portion 31 are smaller than the arrangement density and / or cross-sectional area of the second circumferential ribs 321 in the second mesh cover portion 32. This can more effectively reduce the first mesh cover portion 31's obstruction of the air outlet area, thereby helping to reduce the impact of the first mesh cover portion 31 on air outlet resistance.

[0071] Reference Figures 6-10 According to some embodiments of the present invention, the mesh cover portion 302 further includes a third mesh cover portion 33. In the radial direction of the axial flow impeller 2, the third mesh cover portion 33 is located radially outward of the second mesh cover portion 32. The projection of the third mesh cover portion 33 on the reference plane is a third projection, and at least a portion of the third projection is located radially outward of the reference circle. For example, a portion of the three projections may be located radially outward of the reference circle, or all of the three projections may be located radially outward of the reference circle. By including the third mesh cover portion 33 in the mesh cover portion 302, the air outlet area of the air outlet mesh cover 3 can be increased, which helps to further reduce air outlet noise.

[0072] The rib arrangement density of the second mesh cover portion 32 is greater than the rib arrangement density of the third mesh cover portion 33 and / or the cross-sectional area of at least some of the ribs in the second mesh cover portion 32 is greater than the cross-sectional area of the ribs in the third mesh cover portion 33. The rib arrangement density of the second mesh cover portion 32 is greater than the rib arrangement density of the third mesh cover portion 33 and / or the cross-sectional area of at least some of the ribs in the second mesh cover portion 32 is greater than the cross-sectional area of the ribs in the third mesh cover portion 33, including the following three situations: for example, the rib arrangement density of the second mesh cover portion 32 is greater than the rib arrangement density of the third mesh cover portion 33; for example, the cross-sectional area of at least some of the ribs in the second mesh cover portion 32 is greater than the cross-sectional area of the ribs in the third mesh cover portion 33; for example, the rib arrangement density of the second mesh cover portion 32 is greater than the rib arrangement density of the third mesh cover portion 33 and the cross-sectional area of at least some of the ribs in the second mesh cover portion 32 is greater than the cross-sectional area of the ribs in the third mesh cover portion 33.

[0073] Among them, the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the third mesh cover part 33, which may include the following situations: for example, the cross-sectional area of some of the ribs in the second mesh cover part 32 may be greater than the cross-sectional area of each rib in the third mesh cover part 33; for another example, the cross-sectional area of each rib in the second mesh cover part 32 may be greater than the cross-sectional area of each rib in the third mesh cover part 33.

[0074] In the radial direction of the axial flow wind wheel 2, the third mesh cover part 33 is located radially outside the second mesh cover part 32, so that the third mesh cover part 33 is located on the side of the second mesh cover part 32 away from the center of the axial flow wind wheel 2, that is, the third mesh cover part 33 is located in the edge area close to the air outlet mesh cover 3, and the outlet air flow velocity corresponding to the third mesh cover part 33 is relatively small, and the structural strength requirement of the third mesh cover part 33 can also be relatively low. The rib arrangement density of the third mesh cover part 33 is small and / or the cross-sectional area of the ribs of the third mesh cover part 33 is small. While meeting the structural strength, the airflow blocking area of the third mesh cover part 33 can be made smaller, thereby reducing the blocking area of the airflow in the edge area close to the air outlet mesh cover 3, so as to reduce the flow resistance and noise of the airflow flowing in this area.

[0075] Reference Figure 2-Figure 5 According to some embodiments of the present invention, the mesh cover portion 302 includes a plurality of circumferential ribs 303 and a plurality of radial ribs 34. The plurality of circumferential ribs 303 are arranged at intervals along the radial direction of the axial flow wind wheel 2. The circumferential ribs 303 extend circumferentially along the axial flow wind wheel 2. The radial ribs 34 are arranged to intersect with the circumferential ribs 303. The radial ribs 34 and the circumferential ribs 303 are arranged to intersect to form a grid structure. This can enhance the overall structural strength of the air outlet mesh cover 3 and can also reduce or avoid contact between the human body and the axial flow wind wheel 2, especially the possibility of safety accidents caused by fingers extending from the gaps between the ribs of the air outlet mesh cover 3 and contacting the axial flow wind wheel 2.

[0076] The arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than that of the third mesh cover part 33 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than that of the third mesh cover part 33. The arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than the arrangement density of the circumferential ribs 303 of the third mesh cover part 33 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 of the third mesh cover part 33, which may include the following three situations: for example, the arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than the arrangement density of the circumferential ribs 303 of the third mesh cover part 33; for example, the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 of the third mesh cover part 33; for example, the arrangement density of the circumferential ribs 303 of the second mesh cover part 32 is greater than the arrangement density of the circumferential ribs 303 of the third mesh cover part 33, and the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 of the third mesh cover part 33.

[0077] Among them, the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 is greater than the cross-sectional area of the circumferential ribs 303 in the third mesh cover part 33, which may include the following situations: for example, the cross-sectional area of some of the circumferential ribs 303 in the second mesh cover part 32 may be greater than the cross-sectional area of each circumferential rib 303 in the third mesh cover part 33; for another example, the cross-sectional area of each circumferential rib 303 in the second mesh cover part 32 may be greater than the cross-sectional area of each circumferential rib 303 in the third mesh cover part 33.

[0078] For example, the circumferential ribs 303 may be circular or arc-shaped.

[0079] By making the arrangement density of the circumferential ribs 303 of the second mesh cover part 32 greater than the arrangement density of the circumferential ribs 303 of the third mesh cover part 33 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover part 32 greater than the cross-sectional area of the circumferential ribs 303 of the third mesh cover part 33, the circumferential ribs 303 extend circumferentially along the air outlet mesh cover 3, so that the circumferential ribs 303 in the second mesh cover part 32 can more effectively enhance the structural strength of the air outlet mesh cover 3, and during the rotation of the axial flow wind wheel 2, the inefficient area of the blades 202 of the axial flow wind wheel 2 will also form an annular area, which can also better reduce the influence of the second mesh cover part 32 on the air outlet efficiency of the axial flow wind wheel 2, which is beneficial to reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3.

[0080] Reference Figure 3-Figure 7According to some embodiments of the present invention, the plurality of circumferential ribs 303 include a third circumferential rib 331 and a second circumferential rib 321. The third mesh cover portion 33 includes a plurality of third circumferential ribs 331. The second mesh cover portion 32 includes at least one second circumferential rib 321. The cross-sectional area of the second circumferential rib 321 is greater than the cross-sectional area of the third circumferential rib 331. The smaller cross-sectional area of the third circumferential rib 331 effectively reduces the area of airflow blocked by the third mesh cover portion 33, thereby reducing the flow resistance and noise of airflow in the third mesh cover portion 33. Furthermore, the larger cross-sectional area of the second circumferential rib 321 can provide the second circumferential rib 321 with greater structural strength, thereby ensuring that the second mesh cover portion 32 has a stronger structural strength, and thus ensuring that the entire air outlet mesh cover 3 has a stronger structural strength.

[0081] Reference Figures 6-10 According to some embodiments of the present invention, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the third circumferential rib 331 is greater than or equal to 1.8. For example, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the third circumferential rib 331 can be 1.8, 1.9, 2.0, 2.1, 2.2, etc. By making the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the third circumferential rib 331 greater than or equal to 1.8, the cross-sectional area of the third circumferential rib 331 can be smaller, thereby effectively reducing the area of airflow blocked by the third mesh cover portion 33, thereby reducing the airflow resistance and noise of the air outlet mesh cover 3. Furthermore, the cross-sectional area of the second circumferential rib 321 can be larger, thereby ensuring that the second mesh cover portion 32 has a stronger structural strength, thereby ensuring that the air outlet mesh cover 3 as a whole has a stronger structural strength.

[0082] Reference Figures 6-10 According to some embodiments of the present invention, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the third circumferential rib 331 is less than or equal to 15. For example, the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the third circumferential rib 331 can be 5, 8, 10, 13, 15, etc. By making the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the third circumferential rib 331 less than or equal to 15, while increasing the cross-sectional area of the second circumferential rib 321 to improve the structural strength of the air outlet grille 3, the effect of the second circumferential rib 321 on the air outlet resistance can also be taken into account, thereby reducing the air outlet resistance of the second circumferential rib 321.

[0083] Reference Figures 6-10According to some embodiments of the present invention, the thickness of the third circumferential rib 331 in the circumferential direction of the circumferential rib 303 is t3, the thickness of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 is t2, and t2 / t3 ≥ 1.5. For example, the ratio of the thickness t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness t3 of the third circumferential rib 331 in the circumferential direction of the circumferential rib 303 can be 1.5, 2.0, 2.5, 3.0, 3.5, 5, etc. By making the ratio of the thickness dimension t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness dimension t3 of the third circumferential rib 331 in the circumferential direction of the circumferential rib 303 greater than or equal to 1.5, the thickness dimension of the third circumferential rib 331 in the circumferential direction of the circumferential rib 303 can be smaller, so as to effectively reduce the area of airflow obstruction, thereby reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3, and the thickness dimension of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 can also be larger, so as to ensure that the second mesh cover part 32 has a stronger structural strength, so that the air outlet mesh cover 3 as a whole has a stronger structural strength.

[0084] Reference Figures 6-10 According to some embodiments of the present invention, t2 / t3 ≤ 5. For example, the ratio of the thickness dimension t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness dimension t3 of the third circumferential rib 331 in the circumferential direction of the circumferential rib 303 can be 1.5, 2.0, 2.5, 3.0, 3.5, 5, etc. By ensuring that the ratio of the thickness dimension t2 of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 to the thickness dimension t3 of the third circumferential rib 331 in the circumferential direction of the circumferential rib 303 is less than or equal to 5, the thickness dimension of the second circumferential rib 321 is increased to improve the structural strength of the air outlet grille 3 while also taking into account the effect of the second circumferential rib 321 on the air outlet resistance, thereby reducing the air outlet resistance of the second circumferential rib 321.

[0085] Reference Figures 6-10According to some embodiments of the present invention, the height dimension of the third circumferential rib 331 in the axial direction of the axial flow rotor 2 is h3, the height dimension of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 is h2, and h2 / h3 ≥ 1.2. For example, the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 to the height dimension h3 of the third circumferential rib 331 in the axial direction of the axial flow rotor 2 can be 1.2, 1.5, 2.0, 2.5, 3.0, etc. By making the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow wind wheel 2 to the height dimension h3 of the third circumferential rib 331 in the axial direction of the axial flow wind wheel 2 greater than or equal to 1.2, the height dimension of the third circumferential rib 331 in the axial direction of the axial flow wind wheel 2 can be smaller, and the cross-sectional area of the third circumferential rib 331 can be smaller, so as to effectively reduce the blocking area of the airflow by the third circumferential rib 331, thereby reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3, and also making the height dimension of the second circumferential rib 321 in the axial direction of the axial flow wind wheel 2 larger, so as to make the cross-sectional area of the second circumferential rib 321 larger, so as to ensure that the second mesh cover part 32 has a stronger structural strength, thereby making the air outlet mesh cover 3 as a whole have a stronger structural strength.

[0086] Reference Figures 6-10 According to some embodiments of the present invention, h2 / h3 ≤ 3. For example, the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 to the height dimension h3 of the third circumferential rib 331 in the axial direction of the axial flow rotor 2 can be 1.2, 1.5, 2.0, 2.5, 3.0, etc. By ensuring that the ratio of the height dimension h2 of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 to the height dimension h3 of the third circumferential rib 331 in the axial direction of the axial flow rotor 2 is less than or equal to 3, the height dimension of the second circumferential rib 321 is increased to improve the structural strength of the air outlet grille 3 while also taking into account the effect of the second circumferential rib 321 on the air outlet resistance, thereby reducing the air outlet resistance of the second circumferential rib 321. Furthermore, the possibility of eddy currents generated due to an excessively large height difference between the third circumferential rib 331 and the second circumferential rib 321 can be reduced.

[0087] Reference Figures 6-10According to some embodiments of the present invention, the radiating ribs 34 include a third rib segment located in the third mesh cover portion 33 and a second rib segment 342 located in the second mesh cover portion 32. The cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the third rib segment and / or the arrangement density of the second rib segment 342 is greater than the arrangement density of the third rib segment. The cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the third rib segment and / or the arrangement density of the second rib segment 342 is greater than the arrangement density of the third rib segment may include the following situations: for example, the cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the third rib segment; for example, the arrangement density of the second rib segment 342 is greater than the arrangement density of the third rib segment; for example, the cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the third rib segment, and the arrangement density of the second rib segment 342 is greater than the arrangement density of the third rib segment.

[0088] By making the arrangement density of the second rib segments 342 in the radiating ribs 34 located in the second mesh cover part 32 greater than the arrangement density of the third rib segments in the radiating ribs 34 located in the third mesh cover part 33 and / or making the cross-sectional area of the second rib segments 342 in the radiating ribs 34 located in the second mesh cover part 32 greater than the cross-sectional area of the third rib segments in the radiating ribs 34 located in the third mesh cover part 33, the structural strength of the air outlet mesh cover 3 can be further enhanced, and this is conducive to reducing the air outlet resistance and air outlet noise of the air outlet mesh cover 3.

[0089] Reference Figure 3-Figure 5 According to some embodiments of the present invention, a notch 211 is formed on the trailing edge 21 of the blade 202 of the axial flow wind rotor 2. The projection of the notch 211 on the reference plane is a fourth projection, and the second projection and the fourth projection at least partially overlap. By providing the notch 211 on the trailing edge 21 of the blade 202 of the axial flow wind rotor 2, and positioning the notch 211 closer to the blade tip 23 relative to the blade root 24, the inefficient regions of the trailing edge 21 and blade tip 23 of the blade 202 that perform negative work can be effectively eliminated, thereby reducing the energy loss caused by the negative work performed in these inefficient regions, thereby effectively improving the operating efficiency of the axial flow wind rotor 2.

[0090] Moreover, the second projection is at least partially overlapped with the fourth projection, so that in the axial direction of the axial flow wind wheel 2, the second mesh cover part 32 is opposite to at least a part of the above-mentioned notch 211 of the axial flow wind wheel 2. Since the notch 211 is an inefficient area of the axial flow wind wheel 2, the second mesh cover part 32 with a larger rib arrangement density and / or a larger rib cross-sectional area corresponds to the notch 211 on the blade trailing edge 21 in the axial direction of the axial flow wind wheel 2, so that the loss of the air outlet efficiency of the second mesh cover part 32 can be reduced. In this way, the overall structural strength of the air outlet mesh cover 3 can be improved in the inefficient area, and the air outlet efficiency can be improved in the efficient area close to the center area of the axial flow wind wheel 2, thereby effectively improving the air outlet efficiency of the air outlet mesh cover 3 and reducing the air outlet resistance and air outlet noise.

[0091] Reference Figure 3-Figure 5 According to some embodiments of the present invention, the second projection includes an inner contour line g and an outer contour line z that are arranged opposite to each other along the radial direction of the axial flow impeller 2, and the inner contour line g and the outer contour line z both intersect with the fourth projection. By virtue of the inner contour line g and the outer contour line z of the second projection both intersecting with the fourth projection, the second mesh cover portion 32 is located at a position opposite to the notch 211, so that the second mesh cover portion 32 can be placed in an inefficient area. By increasing the cross-sectional area of the air outlet mesh cover 3 opposite to the inefficient area, the amount of airflow loss caused by the increased cross-sectional area can be minimized, and the structural strength of the air outlet mesh cover 3 can also be effectively enhanced.

[0092] Refer to the following Figures 1-10 An air conditioner outdoor unit 100 according to some embodiments of the present invention is described.

[0093] Reference Figures 1-10 In this embodiment, the air-conditioning outdoor unit 100 includes an outdoor casing 1, an axial-flow fan wheel 2 and an air outlet mesh cover 3. The outdoor casing 1 is formed with an air inlet and an air outlet 11. The air outlet 11 is located on the front side of the outdoor casing 1. The axial-flow fan wheel 2 is arranged in the outdoor casing 1 and is opposite to the air outlet 11. The central axis of the axial-flow fan wheel 2 extends in the front-to-back direction. The air outlet mesh cover 3 is arranged in front of the air outlet 11 and includes a mesh cover portion 302.

[0094] The mesh cover part 302 includes a first mesh cover part 31, a second mesh cover part 32 and a third mesh cover part 33. In the radial direction of the axial flow wind wheel 2, the second mesh cover part 32 is located radially outside the first mesh cover part 31, and the third mesh cover part 33 is located radially outside the second mesh cover part 32. The rib arrangement density of the second mesh cover part 32 is greater than the rib arrangement density of the first mesh cover part 31 and / or the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the first mesh cover part 31. The rib arrangement density of the second mesh cover part 32 is greater than the rib arrangement density of the third mesh cover part 33 and / or the cross-sectional area of at least some of the ribs in the second mesh cover part 32 is greater than the cross-sectional area of the ribs in the third mesh cover part 33.

[0095] Among them, the projection of the axial flow wind wheel 2 on the reference plane is the first projection, the projection of the second mesh cover part 32 on the reference plane is the second projection, and the projection of the third mesh cover part 33 on the reference plane is the third projection. The reference plane is perpendicular to the central axis of the axial flow wind wheel 2. On the reference plane, the outer peripheral contour line of the hub 201 of the wind wheel is the hub 201 contour line. A reference circle is made with the center of the axial flow wind wheel 2 as the center and the radius of the axial flow wind wheel 2 as the radius. The second projection is located between the hub 201 contour line and the reference circle. In the radial direction of the axial flow wind wheel 2, the radial spacing between the second projection and the hub 201 contour line is f1, and the radial spacing between the reference circle and the hub 201 contour line is f2, and f1 / f2>1 / 2.

[0096] The mesh cover portion 302 includes a plurality of circumferential ribs 303 and a plurality of radial ribs 34. The plurality of circumferential ribs 303 are arranged at intervals along the radial direction of the axial flow wind wheel 2. The circumferential ribs 303 extend along the circumference of the axial flow wind wheel 2. The radial ribs 34 are arranged to intersect with the circumferential ribs 303. The arrangement density of the circumferential ribs 303 of the second mesh cover portion 32 is greater than the arrangement density of the circumferential ribs 303 of the first mesh cover portion 31 and / or the cross-sectional area of at least some of the circumferential ribs 303 in the second mesh cover portion 32 is greater than the cross-sectional area of the circumferential ribs 303 of the first mesh cover portion 31.

[0097] The plurality of circumferential ribs 303 include a first circumferential rib 311 and a second circumferential rib 321. The first mesh cover portion 31 includes a plurality of first circumferential ribs 311, and the second mesh cover portion 32 includes at least one second circumferential rib 321. The cross-sectional area of the second circumferential rib 321 is greater than the cross-sectional area of the first circumferential rib 311. The ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 is greater than or equal to 1.8, and the ratio of the cross-sectional area of the second circumferential rib 321 to the cross-sectional area of the first circumferential rib 311 is less than or equal to 15.

[0098] The thickness of the first circumferential rib 311 in the circumferential direction of the circumferential rib 303 is t1, and the thickness of the second circumferential rib 321 in the circumferential direction of the circumferential rib 303 is t2, where t2 / t1 ≥ 1.5 and t2 / t1 ≤ 5. The height of the first circumferential rib 311 in the axial direction of the axial flow rotor 2 is h1, and the height of the second circumferential rib 321 in the axial direction of the axial flow rotor 2 is h2, where h2 / h1 ≥ 1.2 and h2 / h1 ≤ 3.

[0099] The radiating ribs 34 include a first rib segment 341 located in the first mesh cover part 31 and a second rib segment 342 located in the second mesh cover part 32. The cross-sectional area of the second rib segment 342 is greater than the cross-sectional area of the first rib segment 341 and / or the arrangement density of the second rib segment 342 is greater than the arrangement density of the first rib segment 341.

[0100] A notch 211 is formed on the trailing edge 21 of the blade 202 of the axial flow wind wheel 2. The projection of the notch 211 on the reference plane is the fourth projection. The second projection at least partially overlaps with the fourth projection. The second projection includes an inner contour line and an outer contour line arranged opposite to each other along the radial direction of the axial flow wind wheel 2. Both the inner contour line and the outer contour line intersect with the fourth projection.

[0101] Reference Figure 1 The air conditioning system according to the second embodiment of the present invention includes the air conditioning outdoor unit 100 according to the first embodiment of the present invention.

[0102] The air conditioning system includes an air conditioning indoor unit and an air conditioning outdoor unit 100 , wherein the number of the air conditioning indoor unit may be one or more.

[0103] According to the air conditioning system of the embodiment of the present invention, by providing the above-mentioned air conditioning outdoor unit 100, the air outlet mesh cover 3 of the air conditioning outdoor unit 100 has good structural strength, small air outlet resistance, and low air outlet noise, which can improve the overall performance of the air conditioning system.

[0104] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0105] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0106] In the description of the present invention, "plurality" means two or more.

[0107] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0108] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0109] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0110] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An air conditioner outdoor unit, characterized in that: include: An outdoor housing is formed with an air inlet and an air outlet, wherein the air outlet is located at the front side of the outdoor housing; an axial flow fan wheel, disposed in the outdoor housing and opposite to the air outlet, wherein the central axis of the axial flow fan wheel extends in a front-to-rear direction; an air outlet mesh cover, which is arranged at the front side of the air outlet and includes a mesh cover portion, wherein the mesh cover portion includes a first mesh cover portion and a second mesh cover portion, wherein in the radial direction of the axial flow impeller, the second mesh cover portion is located radially outward of the first mesh cover portion, the rib arrangement density of the second mesh cover portion is greater than the rib arrangement density of the first mesh cover portion, and / or the cross-sectional area of at least some of the ribs in the second mesh cover portion is greater than the cross-sectional area of the ribs in the first mesh cover portion; In which, the projection of the axial flow wind wheel on the reference plane is the first projection, the projection of the second mesh cover part on the reference plane is the second projection, the reference plane is perpendicular to the central axis of the axial flow wind wheel, on the reference plane, the outer peripheral contour line of the hub of the wind wheel is the hub contour line, and a reference circle is made with the center of the axial flow wind wheel as the center and the radius of the axial flow wind wheel as the radius, the second projection is located between the hub contour line and the reference circle, in the radial direction of the axial flow wind wheel, the radial spacing between the second projection and the hub contour line is f1, the radial spacing between the reference circle and the hub contour line is f2, and f1 / f2>1 / 2.

2. The air conditioner outdoor unit according to claim 1, characterized in that: The mesh cover portion includes a plurality of circumferential ribs and a plurality of radial ribs, wherein the plurality of circumferential ribs are arranged at intervals along the radial direction of the axial flow wind wheel, the circumferential ribs extend along the circumference of the axial flow wind wheel, the radial ribs are arranged to intersect with the circumferential ribs, the arrangement density of the circumferential ribs of the second mesh cover portion is greater than the arrangement density of the circumferential ribs of the first mesh cover portion and / or the cross-sectional area of at least part of the circumferential ribs in the second mesh cover portion is greater than the cross-sectional area of the circumferential ribs of the first mesh cover portion.

3. The air conditioner outdoor unit according to claim 2, characterized in that: The plurality of circumferential ribs include first circumferential ribs and second circumferential ribs, the first mesh cover portion includes a plurality of the first circumferential ribs, the second mesh cover portion includes at least one second circumferential rib, and the cross-sectional area of the second circumferential rib is greater than the cross-sectional area of the first circumferential rib.

4. The air conditioner outdoor unit according to claim 3, characterized in that: A ratio of a cross-sectional area of the second circumferential rib to a cross-sectional area of the first circumferential rib is greater than or equal to 1.

8.

5. The air conditioner outdoor unit according to claim 4, characterized in that: A ratio of a cross-sectional area of the second circumferential rib to a cross-sectional area of the first circumferential rib is less than or equal to 15.

6. The air conditioner outdoor unit according to claim 3, characterized in that: The thickness of the first circumferential rib in the circumferential direction of the circumferential rib is t1, the thickness of the second circumferential rib in the circumferential direction of the circumferential rib is t2, and t2 / t1≥1.

5.

7. The air conditioner outdoor unit according to claim 6, characterized in that: t2 / t1≤5.

8. The air conditioner outdoor unit according to claim 3, characterized in that: The height dimension of the first circumferential rib in the axial direction of the axial flow wind wheel is h1, the height dimension of the second circumferential rib in the axial direction of the axial flow wind wheel is h2, and h2 / h1≥1.

2.

9. The air conditioner outdoor unit according to claim 8, characterized in that: h2 / h1≤3.

10. The air conditioner outdoor unit according to claim 2, wherein: The radiating ribs include a first rib segment located in the first mesh cover part and a second rib segment located in the second mesh cover part, wherein the cross-sectional area of the second rib segment is greater than the cross-sectional area of the first rib segment and / or the arrangement density of the second rib segment is greater than the arrangement density of the first rib segment.

11. The air conditioner outdoor unit according to claim 2, characterized in that: The arrangement density of the circumferential ribs is greater than the arrangement density of the radial ribs.

12. The air conditioner outdoor unit according to claim 1, wherein: The mesh cover portion further includes a third mesh cover portion, which is located radially outward of the second mesh cover portion in the radial direction of the axial flow wind wheel, and a projection of the third mesh cover portion on the reference plane is a third projection, and at least a portion of the third projection is located radially outward of the reference circle; The rib arrangement density of the second mesh cover part is greater than that of the third mesh cover part and / or the cross-sectional area of at least part of the ribs in the second mesh cover part is greater than that of the ribs in the third mesh cover part.

13. The air conditioner outdoor unit according to any one of claims 1 to 12, characterized in that: A notch is formed on the trailing edge of the blade of the axial flow wind wheel, the projection of the notch on the reference plane is a fourth projection, and the second projection at least partially overlaps with the fourth projection.

14. The air conditioner outdoor unit according to claim 13, wherein: The second projection includes an inner contour line and an outer contour line that are arranged opposite to each other along the radial direction of the axial flow wind wheel, and both the inner contour line and the outer contour line intersect with the fourth projection.

15. An air conditioning system, characterized in that: include: The air-conditioning outdoor unit according to any one of claims 1 to 14.

Images