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 net cover, an air inlet and an air outlet are formed in the outdoor unit shell, the air outlet is located in the front side of the outdoor unit shell, the front surface of the outdoor unit shell comprises a mounting face, and the mounting face surrounds the peripheral side of the air outlet; the axial flow wind wheel is arranged in the outdoor unit shell and is opposite to the air outlet, the central axis of the axial flow wind wheel extends in the front-back direction, the air outlet net cover covers the front side of the air outlet and is installed on the installation face, the air outlet net cover comprises an outer frame body and a net cover part, and the outer frame body surrounds the peripheral side of the net cover part; the mesh enclosure part is located on the front side of the mounting face and is spaced from the mounting face in the front-back direction, so that an air outlet cavity is defined between the air outlet mesh enclosure and the mounting face. According to the air conditioner outdoor unit, the air outlet space can be increased in the axial direction, the air outlet resistance of the mesh enclosure part can be reduced, and air outlet noise can be reduced.

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] Axial flow impellers are widely used in related technologies. For example, they are used in air conditioning systems and other air conditioning equipment to drive airflow. They are often equipped with a mesh screen on the front side of the air outlet to prevent direct contact with the impeller and potential personal injury. However, the air outlet noise from these air conditioning outdoor units is relatively high. Therefore, reducing this noise has become a pressing technical issue. 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 with low air outlet noise.

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

[0005] According to an embodiment of the first aspect of the present invention, the outdoor unit of an air conditioner includes: an outdoor casing, which is formed with an air inlet and an air outlet, the air outlet is located on the front side of the outdoor casing, and the front surface of the outdoor casing includes a mounting surface, and the mounting surface surrounds the outer periphery of the air outlet; an axial flow wind wheel is arranged in the outdoor casing and opposite to the air outlet, and the central axis of the axial flow wind wheel extends along the front-to-back direction; an air outlet mesh cover is arranged on the front side of the air outlet and mounted on the mounting surface, the air outlet mesh cover includes an outer frame and a mesh cover part, the outer frame surrounds the outer periphery of the mesh cover part, the mesh cover part is located on the front side of the mounting surface and is spaced apart from the mounting surface in the front-to-back direction to define an air outlet cavity between the air outlet mesh cover and the mounting surface.

[0006] According to the outdoor unit of the air conditioner according to an embodiment of the present invention, an air outlet cavity can be defined between the air outlet mesh cover and the mounting surface on the outdoor casing by spacing the mesh cover portion of the air outlet mesh cover from the mounting surface on the outdoor casing in the front-to-rear direction. In this way, the air outlet space can be increased in the axial direction of the axial flow wind wheel, and the distance between the mesh cover portion and the axial flow wind wheel is also increased, which can reduce the resistance of the mesh cover portion to the air outlet, which is beneficial to reducing the air outlet noise.

[0007] According to some embodiments of the present invention, the distance between the mesh cover portion and the mounting surface in the front-to-back direction is a, the size of the mesh cover portion in the front-to-back direction is b, and a>b.

[0008] According to some embodiments of the present invention, 1.2≤a / b≤1.8.

[0009] According to some embodiments of the present invention, the entire mounting surface is located on the front side of the axial flow wind wheel.

[0010] According to some embodiments of the present invention, the mounting surface is a plane.

[0011] According to some embodiments of the present invention, the periphery of the air outlet constitutes the inner periphery of the mounting surface.

[0012] According to some embodiments of the present invention, the mesh cover portion includes a main air outlet portion and an auxiliary air outlet portion, the auxiliary air outlet portion is located on the outer peripheral side of the main air outlet portion, and in the front-to-back direction, the main air outlet portion is opposite to the air outlet, and the auxiliary air outlet portion is opposite to the mounting surface.

[0013] According to some embodiments of the present invention, the projection of the outer frame on the reference plane is a first projection, the reference plane is perpendicular to the central axis of the axial flow wind wheel, the inner contour line of the first projection is a first contour line, the first contour line is a square, the inscribed circle of the first contour line is a first base circle, the circumscribed circle of the first contour line is a second base circle, the outer boundary of the air outlet area of the mesh cover part is the air outlet outer boundary, the air outlet outer boundary is composed of the first contour line and the third base circle, the third base circle is located between the first base circle and the second base circle, the first base circle defines the main air outlet part, the first base circle and the air outlet outer boundary jointly define the auxiliary air outlet part, the third base circle is concentrically arranged with the first base circle, and the center of the first base circle is located on the central axis of the axial flow wind wheel.

[0014] According to some embodiments of the present invention, the distance between the third base circle and the first base circle is d1, the distance between the third base circle and the second base circle is d2, and d1>d2.

[0015] According to some embodiments of the present invention, 1.2≤d1 / d2≤1.8.

[0016] According to some embodiments of the present invention, the projection of the air outlet on the reference plane is a second projection, and the second projection is located within the first base circle.

[0017] According to some embodiments of the present invention, the mesh cover portion includes a fixing portion, which is located between the auxiliary air outlet portion and the outer frame. A positioning protrusion is provided on the side of the fixing portion facing the mounting surface, and a positioning hole is provided on the mounting surface, and the positioning protrusion is inserted into the positioning hole.

[0018] 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, and at least some of the circumferential ribs have different cross-sectional areas.

[0019] According to some embodiments of the present invention, the plurality of circumferential ribs include a first circumferential rib and a second circumferential rib, the cross-sectional area of the second circumferential rib is larger than the cross-sectional area of the first circumferential rib, and the second circumferential rib is closer to the outer frame relative to the center of the mesh cover portion.

[0020] 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, and the projection of the notch on the reference plane is a third projection. On the reference plane, at least part of the second circumferential ribs intersects with the third projection.

[0021] According to some embodiments of the present invention, the mesh cover portion includes a central connecting plate, a plurality of the circumferential ribs are located between the central connecting plate and the outer frame, one end of each of the radial ribs is connected to the central connecting plate, and the other end of each of the radial ribs is connected to the outer frame.

[0022] According to some embodiments of the present invention, the radiation ribs extend along a curve in a direction from the center of the mesh cover portion to the outer frame, and in the extending direction of the radiation ribs, the radiation ribs include a plurality of radiation segments with different curvatures.

[0023] According to some embodiments of the present invention, a sealing flange is formed on a side of the outer frame facing the mounting surface, and the sealing flange is in sealing cooperation with the mounting surface.

[0024] According to some embodiments of the present invention, a mounting groove is formed on the front surface of the outdoor casing, a bottom surface of the mounting groove constitutes the mounting surface, and the sealing flange is accommodated in the mounting groove.

[0025] An air conditioning system according to an embodiment of a second aspect of the present invention includes: an air conditioning outdoor unit according to an embodiment of the first aspect of the present invention.

[0026] 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 noise of the air conditioning outdoor unit is low, and the overall performance of the air conditioning system can be improved.

[0027] 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

[0028] 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:

[0029] Figure 1 is a perspective schematic diagram of an air-conditioning outdoor unit according to some embodiments of the present invention;

[0030] Figure 2 yes Figure 1 Schematic diagram of the coordination between the front panel of the air conditioner outdoor unit, the axial flow fan wheel, and the air outlet grille;

[0031] Figure 3 yes Figure 2 A schematic diagram showing the coordination of the front panel, the axial flow fan wheel, and the air outlet grille at another angle;

[0032] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0034] Figure 6 yes Figure 2 A schematic diagram showing the coordination of the front panel, the axial flow fan wheel, and the air outlet grille at another angle;

[0035] Figure 7 yes Figure 6 Cross-sectional view along CC line;

[0036] Figure 8 yes Figure 6 Schematic diagram of the coordination between the front panel and the air outlet grille;

[0037] Figure 9 yes Figure 8 Cross-sectional view along line DD;

[0038] Figure 10 yes Figure 9 Enlarged view of point E in the middle;

[0039] Figure 11 yes Figure 8 Schematic diagram of the front panel;

[0040] Figure 12 yes Figure 11 Enlarged view of point F in the middle;

[0041] Figure 13 yes Figure 8 A three-dimensional schematic diagram of the air outlet grille;

[0042] Figure 14 yes Figure 13 Enlarged view of point G in the middle;

[0043] Figure 15 yes Figure 6 Schematic diagram of the coordination between the axial flow fan wheel and the air outlet mesh cover;

[0044] Figure 16 yes Figure 13 A three-dimensional schematic diagram of the air outlet grille from another angle;

[0045] Figure 17 yes Figure 16 Enlarged view of point H in the middle;

[0046] Figure 18 yes Figure 16 Schematic diagram of the air outlet grille;

[0047] Figure 19 yes Figure 18 Cross-sectional view along line II;

[0048] Figure 20 yes Figure 19 Enlarged view of point J in the middle.

[0049] Reference numerals:

[0050] 100. Air conditioner outdoor unit;

[0051] 1. Outdoor housing; 11. Air outlet; 12. Mounting groove; 121. Mounting surface; 1211. Positioning hole; 1212. Second fixing hole; 13. Front panel;

[0052] 2. Axial flow rotor; 201. Hub; 202. Blades; 21. Trailing edge; 211. Notch; 22. Leading edge; 23. Blade tip; 24. Blade root;

[0053] 3. Air outlet mesh cover; 30. Mesh cover part; 301. Main air outlet part; 302. Auxiliary air outlet part; 303. Center connecting plate; 304. Fixing part; 3041. Positioning protrusion; 3042. First fixing hole; 31. Circumferential ribs; 311. First circumferential ribs; 321. Second circumferential ribs; 331. Third circumferential ribs; 34. Radial ribs; 35. Outer frame; 351. Sealing flange. DETAILED DESCRIPTION

[0054] 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.

[0055] Reference below Figures 1-20 An air conditioner outdoor unit 100 according to an embodiment of the present invention will be described.

[0056] Reference Figure 1 、 Figure 6 and Figure 7 According to an embodiment of the first aspect of the present invention, an air conditioner outdoor unit 100 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 front surface of the outdoor housing 1 includes a mounting surface 121. The mounting surface 121 surrounds the outer periphery of the air outlet 11. The air outlet grille 3 is disposed in front of the air outlet 11 and is mounted on the mounting surface 121. The axial-flow fan 2 is disposed within the outdoor housing 1 and is arranged opposite to 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 13. The air outlet 11 is formed on the front panel 13. The front surface of the front panel 13 includes the mounting surface 121.

[0057] 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.

[0058] 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.

[0059] The air outlet grille 3 includes an outer frame 35 and a grille portion 30. The grille portion 30 is formed with a plurality of mesh holes. The grille portion 30 has a hollow structure and is used for the outlet airflow to pass through. The outer frame 35 surrounds the outer periphery of the grille portion 30, and the outer frame 35 can enhance the structural strength of the air outlet grille 3. The grille portion 30 is located in front of the mounting surface 121 and is spaced apart from the mounting surface 121 in the front-to-back direction, thereby defining an air outlet cavity between the air outlet grille 3 and the mounting surface 121. The mesh cover part 30 is spaced apart from the mounting surface 121 on the outdoor casing 1 in the front-to-back direction, so that an air outlet cavity is defined between the air outlet mesh cover 3 and the mounting surface 121 on the outdoor casing 1. In this way, the airflow discharged from the air outlet 11 flows into the air outlet cavity and then is discharged through the air outlet mesh cover 3, which can increase the air outlet space in the axial direction of the axial flow fan wheel 2, thereby helping to reduce the air outlet noise; and since the mesh cover part 30 is spaced apart from the mounting surface 121 on the outdoor casing 1 in the front-to-back direction, the distance between the mesh cover part 30 and the axial flow fan wheel 2 can also be larger. The larger the distance between the mesh cover part 30 and the axial flow fan wheel 2 in the axial direction of the axial flow fan wheel 2, the lower the flow rate of the airflow passing through the mesh cover part 30. This can reduce the resistance of the mesh cover part 30 to the air outlet, which is helpful to reduce the air outlet noise.

[0060] According to the air-conditioning outdoor unit 100 of an embodiment of the present invention, by spacing the mesh cover portion 30 of the air outlet mesh cover 3 from the mounting surface 121 on the outdoor casing 1 in the front-to-rear direction, an air outlet cavity can be defined between the air outlet mesh cover 3 and the mounting surface 121 on the outdoor casing 1. In this way, the air outlet space can be increased in the axial direction of the axial flow wind wheel 2, and the distance between the mesh cover portion 30 and the axial flow wind wheel 2 is also increased, which can reduce the resistance of the mesh cover portion 30 to the air outlet, which is beneficial to reducing the air outlet noise.

[0061] Reference Figures 6-10 According to some embodiments of the present invention, the distance between the mesh cover portion 30 and the mounting surface 121 in the front-to-back direction is a, and the dimension of the mesh cover portion 30 in the front-to-back direction is b, where a>b. By making the distance a between the mesh cover portion 30 and the mounting surface 121 in the front-to-back direction greater than the dimension b of the mesh cover portion 30 in the front-to-back direction, the distance between the mesh cover portion 30 and the mounting surface 121 can be made larger, thereby making the depth of the air outlet cavity defined between the air outlet mesh cover 3 and the mounting surface 121 larger in the front-to-back direction. This can increase the air outlet space, reduce the resistance of the mesh cover portion 30 to the air outlet, and reduce the air outlet noise.

[0062] Reference Figures 6-10According to some embodiments of the present invention, 1.2≤a / b≤1.8. For example, the value of a / b may be 1.2, 1.3, 1.5, 1.7, 1.8, etc. By setting 1.2≤a / b≤1.8, the distance between the mesh cover portion 30 and the mounting surface 121 and the space occupied by the air outlet mesh cover 3 in the front-to-back direction can be better balanced. While making the distance between the mesh cover portion 30 and the mounting surface 121 larger to reduce the resistance of the mesh cover portion 30 to the air outlet and reduce the air outlet noise, the space occupied by the air outlet mesh cover 3 in the front-to-back direction can be made relatively small, thereby facilitating reduction in the space occupied by the air conditioner outdoor unit 100 in the front-to-back direction.

[0063] Reference Figures 6-10 According to some embodiments of the present invention, the entire mounting surface 121 is located on the front side of the axial flow fan wheel 2. In this way, the airflow blown out through the axial flow fan wheel 2 can be blown out toward the front side, and then flow into the air outlet cavity defined by the mounting surface 121 and the air outlet mesh cover 3 through the air outlet 11, which is conducive to better reducing the air outlet resistance and air outlet noise, and can reduce or eliminate the airflow interference in the intersecting area of the mounting surface 121 and the axial flow fan wheel 2 in the axial direction, thereby effectively reducing the generation of eddy currents and reducing the air outlet noise.

[0064] For example, when the mounting surface 121 and the axial flow wind wheel 2 at least partially overlap in the axial direction, the high-speed airflow blown out from the downstream side of the axial flow wind wheel 2 collides with the edge of the mounting surface 121, forming a boundary layer separation and generating vortices. Since the mounting surface 121 is located as a whole on the front side of the axial flow wind wheel 2, the possibility of generating vortices due to the staggered arrangement of the mounting surface 121 and the axial flow wind wheel 2 in the axial direction can be reduced or eliminated.

[0065] Reference Figures 6-10 According to some embodiments of the present invention, the mounting surface 121 is a plane, which can make the processing and manufacturing of the mounting surface 121 more convenient, reduce the manufacturing difficulty of the outdoor casing 1, and also make the spacing between the mounting surface 121 and the mesh cover portion 30 more uniform. By making the spacing between the mounting surface 121 and the mesh cover portion 30 more uniform in the axial direction, the resistance of the mesh cover portion 30 to the air outlet is more uniform, which can further reduce the air outlet noise of the air outlet mesh cover 3.

[0066] Reference Figures 6-10 According to some embodiments of the present invention, the periphery of the air outlet 11 constitutes the inner periphery of the mounting surface 121, which can make the airflow at the air outlet 11 blow toward the air outlet mesh cover 3 as much as possible, reducing the possibility of airflow backflow at the air outlet 11, which is beneficial to improving the air outlet efficiency of the air outlet mesh cover 3 and reducing the air outlet noise.

[0067] Reference Figure 2 、 Figure 3 、 Figure 11 and Figure 18According to some embodiments of the present invention, the mesh cover 30 includes a main air outlet 301 and an auxiliary air outlet 302. The auxiliary air outlet 302 is located on the outer periphery of the main air outlet 301. In the front-to-back direction, the main air outlet 301 is opposite the air outlet 11, and the auxiliary air outlet 302 is opposite the mounting surface 121. By providing the auxiliary air outlet 302 on the outer periphery of the main air outlet 301, the air outlet area of the mesh cover 30 can be increased in the radial direction of the axial flow impeller 2, which helps reduce air outlet resistance and thus reduces air outlet noise.

[0068] Reference Figure 16-Figure 18 According to some embodiments of the present invention, the projection of the outer frame 35 on the reference plane is a first projection, the reference plane is perpendicular to the central axis of the axial flow wind wheel 2, the inner contour line of the first projection is a first contour line, the first contour line is a square, the inscribed circle of the first contour line is the first base circle P1, the circumscribed circle of the first contour line is the second base circle P2, the outer boundary of the air outlet area of the mesh cover portion 30 is the air outlet outer boundary w, the air outlet outer boundary w is composed of the first contour line and the third base circle P3, the third base circle P3 is located between the first base circle P1 and the second base circle P2, the first base circle P1 defines the main air outlet portion 301, the first base circle P1 and the air outlet outer boundary w jointly define the auxiliary air outlet portion 302, the third base circle P3 is concentrically arranged with the first base circle P1, and the center o of the first base circle P1 is located on the central axis of the axial flow wind wheel 2, so that the air outlet outer boundary w is located between the first contour line and the third base circle P3, which can effectively increase the air outlet area in the radial direction of the air outlet mesh cover 3 and make the air outlet noise as small as possible.

[0069] Reference Figure 16-Figure 18 According to some embodiments of the present invention, the distance between the third base circle P3 and the first base circle P1 is d1, and the distance between the third base circle P3 and the second base circle P2 is d2, where d1>d2. By making the distance d1 between the third base circle P3 and the first base circle P1 greater than the distance d2 between the third base circle P3 and the second base circle P2, the radial air outlet area of the air outlet grille 3 can be as large as possible, which is conducive to maximizing the air outlet area of the air outlet grille 3, thereby minimizing the air outlet resistance of the air outlet grille 3, and correspondingly reducing the air outlet noise as much as possible.

[0070] Reference Figure 16-Figure 18 According to some embodiments of the present invention, 1.2≤d1 / d2≤1.8. For example, d1 / d2 can be 1.2, 1.4, 1.5, 1.7, 1.8, etc. By ensuring that 1.2≤d1 / d2≤1.8, a better balance can be achieved between the increased radial air outlet area of the air outlet grille 3 and the structural strength of the air outlet grille 3. This allows the auxiliary air outlet portion 302 to have a larger radial air outlet area, thereby increasing the radial air outlet area of the air outlet grille 3 and providing the air outlet grille 3 with greater structural strength.

[0071] For example, the mesh cover portion 30 includes a fixing portion 304, which is located between the third base circle P3 and the second base circle P2, and is fixed to the mounting surface 121. By satisfying 1.2≤d1 / d2≤1.8, the radial dimension of the fixing portion 304 can be increased, thereby providing the fixing portion 304 with greater structural strength, thereby ensuring greater connection stability between the fixing portion 304 and the outdoor housing 1, and further ensuring greater connection stability between the mesh cover portion 30 and the outdoor housing 1.

[0072] Reference Figure 3 and Figure 18 According to some embodiments of the present invention, the second projection of the projection of the air outlet 11 on the reference plane is located within the first base circle P1, so that the air outlet area of the air outlet mesh cover 3 can be larger than the air outlet area of the air outlet 11, and the flow cross-section of the air outlet mesh cover 3 is larger than the flow cross-section of the air outlet 11. In this way, when the air flow rate is constant, the flow cross-section of the air outlet mesh cover 3 is larger than the flow cross-section of the air outlet 11, which can buffer the airflow flowing out of the air outlet 11, reduce the resistance of the air outlet mesh cover 3 to the air outlet, reduce the air outlet noise, and also reduce or avoid the airflow directly impacting the human body at an excessively high flow rate, thereby reducing the discomfort of the human body and helping to improve the user experience.

[0073] Reference Figure 3 、 Figure 4 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 According to some embodiments of the present invention, the mesh cover portion 30 includes a fixing portion 304, which is located between the auxiliary air outlet portion 302 and the outer frame 35. A positioning protrusion 3041 is provided on the side of the fixing portion 304 facing the mounting surface 121. The mounting surface 121 is provided with a positioning hole 1211, and the positioning protrusion 3041 is inserted into the positioning hole 1211. The positioning protrusion 3041 and the positioning hole 1211 can play a positioning role in assembling the fixing portion 304 on the mounting surface 121, so that the assembly position of the fixing portion 304 on the mounting surface 121 is accurate. The positioning protrusion 3041 inserted into the positioning hole 1211 can also limit the air outlet mesh cover 3, reducing the possibility of relative movement between the air outlet mesh cover 3 and the outdoor housing 1 due to external vibration, etc., which is conducive to improving the connection stability between the air outlet mesh cover 3 and the outdoor housing 1.

[0074] For example, a first fixing hole 3042 is provided on the fixing portion 304, a second fixing hole 1212 is provided on the mounting surface 121, and fasteners are passed through the first fixing hole 3042 and the second fixing hole 1212, which can make the connection between the air outlet grille 3 and the outdoor housing 1 simple and have strong stability.

[0075] Reference Figure 15-17 According to some embodiments of the present invention, the mesh cover portion 30 includes a plurality of circumferential ribs 31 and a plurality of radial ribs 34. The plurality of circumferential ribs 31 are arranged at intervals along the radial direction of the axial-flow impeller 2. The circumferential ribs 31 extend along the circumference of the axial-flow impeller 2. The radial ribs 34 intersect with the circumferential ribs 31. At least some of the circumferential ribs 31 have different cross-sectional areas. The different cross-sectional areas of at least some of the circumferential ribs 31 may include the following: for example, the cross-sectional areas of some of the circumferential ribs 31 may be different; or, for another example, the cross-sectional areas of all of the circumferential ribs 31 may be different.

[0076] The radial ribs 34 and the circumferential ribs 31 are arranged to intersect to form a grid structure, which can enhance the overall structural strength of the air outlet mesh cover 3 and 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 into the gaps between the ribs of the air outlet mesh cover 3 and contacting the axial flow wind wheel 2.

[0077] By making the cross-sectional areas of at least some of the circumferential ribs 31 different, the air outlet mesh cover 3 can have a stronger structural strength. For example, the cross-sectional area of at least some of the circumferential ribs 31 can be made larger. This can enhance the structural strength of the air outlet mesh cover 3, reduce the possibility of damage to the air outlet mesh cover 3 when impacted by airflow, and help reduce the obstruction of the air outlet by the mesh cover part 30, thereby helping to reduce the air outlet resistance and air outlet noise.

[0078] In the description of the present invention, "plurality" means two or more.

[0079] Reference Figure 16 、 Figure 17 、 Figure 19 and Figure 20 According to some embodiments of the present invention, the plurality of circumferential ribs 31 include first circumferential ribs 311 and second circumferential ribs 321. The cross-sectional area of the second circumferential ribs 321 is larger than that of the first circumferential ribs 311. The second circumferential ribs 321 are located closer to the outer frame 35 relative to the center of the mesh cover portion 30. By having the cross-sectional area of the second circumferential ribs 321 larger than that of the first circumferential ribs 311, the overall structural strength of the air outlet mesh cover 3 can be enhanced. Furthermore, by arranging the thicker second circumferential ribs 321 closer to the outer frame 35, the airflow velocity at the radially outer edge of the axial-flow impeller 2 is higher. This allows the portion of the air outlet mesh cover 3 closer to the outer frame 35 to have a higher structural strength, thereby effectively carrying this portion of the airflow and reducing the possibility of deformation or damage to the air outlet mesh cover 3 in this portion away from the center of the mesh cover portion 30 due to the impact of the airflow.

[0080] In some embodiments, the plurality of circumferential ribs 31 include a third circumferential rib 331, at least a portion of which is located radially outward from the second circumferential rib 321. The cross-sectional area of the second circumferential rib 321 is larger 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 30, thereby reducing the flow resistance and noise of airflow in the third mesh cover portion 30. Furthermore, the larger cross-sectional area of the second circumferential rib 321 provides greater structural strength for the second circumferential rib 321, thereby enhancing the structural strength of the second mesh cover portion 30 and, in turn, enhancing the structural strength of the outlet mesh cover 3 as a whole.

[0081] Reference Figure 3 、 Figure 5 and Figure 15 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 third projection. On the reference plane, at least a portion of the second circumferential ribs 321 intersects with the third projection. 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.

[0082] By intersecting at least part of the second circumferential ribs 321 with the third projection, at least part of the second circumferential ribs 321 can be opposite to the notch 211 of the axial flow wind wheel 2 in the axial direction of the axial flow wind wheel 2. Since the area of the notch 211 is an inefficient area, the second circumferential ribs 321 with a larger cross-sectional area are set in the area opposite to the notch 211, so that the loss of the overall air outlet efficiency of the air outlet mesh cover 3 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.

[0083] For example, the axial flow wind wheel 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 arranged at intervals along the circumference of the hub 201 . The trailing edges 21 of the blades 202 are formed with notches 211 .

[0084] It should be explained that the contour edge of the blade 202 includes a leading edge 22, a blade top 23, a trailing edge 21 and a blade root 24 connected end to end in sequence. The blade root 24 is connected to the hub 201. In the rotation direction of the hub 201, the leading edge 22 is located in front of the trailing edge 21.

[0085] 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.

[0086] Among them, 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 occur. 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.

[0087] By making at least part of the second circumferential ribs 321 intersect with the third projection, at least part of the second circumferential ribs 321 are opposite to the notch 211 in the axial direction of the axial flow wind wheel 2, that is, at least part of the second circumferential ribs 321 are located in the low-efficiency 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 thicker second circumferential ribs 321 on the air outlet efficiency of the air outlet mesh cover 3 can be reduced.

[0088] Reference Figure 3 、 Figure 5 and Figure 15 According to some embodiments of the present invention, the mesh cover portion 30 includes a central connecting plate 303, and a plurality of circumferential ribs 31 are located between the central connecting plate 303 and the outer frame 35. One end of each radial rib 34 is connected to the central connecting plate 303, and the other end of each radial rib 34 is connected to the outer frame 35. The circumferential ribs 31 located between the central connecting plate 303 and the outer frame 35 are arranged along the circumferential direction to form an annular support network. By connecting one end of each radial rib 34 to the central connecting plate 303 and the other end of each radial rib 34 to the outer frame 35, the radial ribs 34 are distributed radially, which can enhance the connection strength between the central connecting plate 303 and the outer frame 35 in the radial direction, thereby facilitating enhancing the overall structural strength of the air outlet mesh cover 3.

[0089] Reference Figure 15-17According to some embodiments of the present invention, the radial ribs 34 extend along a curve from the center of the mesh cover 30 to the outer frame 35. In the direction in which the radial ribs 34 extend, the radial ribs 34 include multiple radial segments with different curvatures. This can further enhance the structural strength of the mesh cover 30. For example, compared to radial ribs 34 extending in a straight line, the radial ribs 34 extending along a curve and including multiple radial segments with different curvatures in the direction in which they extend can improve the load-bearing capacity and load distribution of the radial ribs 34 through dynamic optimization of the geometric shape, reduce the possibility of damage to the radial ribs 34 due to excessive impact, and further enhance the structural strength of the mesh cover 30.

[0090] Reference Figures 6-10 According to some embodiments of the present invention, a sealing flange 351 is formed on the side of the outer frame 35 facing the mounting surface 121, and the sealing flange 351 is in sealing engagement with the mounting surface 121. The formation of the sealing flange 351 on the outer frame 35 can enhance the overall structural strength of the outer frame 35 to a certain extent. The sealing flange 351 in sealing engagement with the mounting surface 121 can enhance the sealing effect between the outer frame 35 and the outdoor housing 1, thereby reducing or preventing air leakage through the gap between the outer frame 35 and the mounting surface 121 and the generation of abnormal noise.

[0091] Reference Figure 9 and Figure 10 According to some embodiments of the present invention, a mounting groove 12 is formed on the front surface of the outdoor housing 1. The bottom surface of the mounting groove 12 constitutes a mounting surface 121, and the sealing flange 351 is received in the mounting groove 12. The mounting groove 12 facilitates assembly between the outer frame 35 and the outdoor housing 1. By receiving the sealing flange 351 in the mounting groove 12, the overall structure of the outer frame 35 and the outdoor housing 1 can be made more compact.

[0092] Refer to the following Figures 1-20 An air conditioner outdoor unit 100 according to some embodiments of the present invention is described.

[0093] Reference Figure 1 、 Figure 6 、 Figure 7 and Figure 18In 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 front surface of the outdoor casing 1 includes a mounting surface 121. The mounting surface 121 surrounds the outer periphery of the air outlet 11. 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 along the front-to-back direction. The air outlet mesh cover 3 is arranged in the front side of the air outlet 11 and is mounted on the mounting surface 121. The air outlet mesh cover 3 includes an outer frame 35 and a mesh cover portion 30. The outer frame 35 surrounds the outer periphery of the mesh cover portion 30. The mesh cover portion 30 is located on the front side of the mounting surface 121 and is spaced apart from the mounting surface 121 in the front-to-back direction to define an air outlet cavity between the air outlet mesh cover 3 and the mounting surface 121.

[0094] The mesh cover 30 includes a main air outlet 301 and an auxiliary air outlet 302. The auxiliary air outlet 302 is located on the outer periphery of the main air outlet 301. In the front-to-back direction, the main air outlet 301 faces the air outlet 11, and the auxiliary air outlet 302 faces the mounting surface 121. The distance between the auxiliary air outlet 302 and the mounting surface 121 in the front-to-back direction is a, and the dimension of the mesh cover 30 in the front-to-back direction is b, where a>b and 1.2≤a / b≤1.8.

[0095] The entire mounting surface 121 is located at the front side of the axial-flow wind wheel 2 . The mounting surface 121 is a plane, and the periphery of the air outlet 11 constitutes the inner periphery of the mounting surface 121 .

[0096] The projection of the outer frame 35 on the reference plane is a first projection. The reference plane is perpendicular to the central axis of the axial-flow wind wheel 2. The inner contour of the first projection is the first contour line. The first contour line is a square. The inscribed circle of the first contour line is the first base circle. The circumscribed circle of the first contour line is the second base circle. The outer boundary of the air outlet area of the mesh cover portion 30 is the air outlet outer boundary. The air outlet outer boundary is composed of the first contour line and the third base circle. The third base circle is located between the first base circle and the second base circle. The first base circle defines the main air outlet portion 301. The first base circle and the air outlet outer boundary together define the auxiliary air outlet portion 302. The third base circle is concentric with the first base circle. The center of the first base circle is located on the central axis of the axial-flow wind wheel 2. The spacing between the third base circle and the first base circle is d1, and the spacing between the third base circle and the second base circle is d2. d1>d2, 1.2≤d1 / d2≤1.8.

[0097] The mesh cover 30 includes a plurality of circumferential ribs 31 and a plurality of radial ribs 34. The plurality of circumferential ribs 31 are arranged at intervals along the radial direction of the axial-flow impeller 2 and extend circumferentially of the axial-flow impeller 2. The radial ribs 34 intersect with the circumferential ribs 31, and at least some of the circumferential ribs 31 have different cross-sectional areas. The mesh cover 30 includes a central connecting plate 303. The plurality of circumferential ribs 31 are located between the central connecting plate 303 and the outer frame 35. One end of each radial rib 34 is connected to the central connecting plate 303, and the other end of each radial rib 34 is connected to the outer frame 35. The radial ribs 34 extend along a curve from the center of the mesh cover 30 to the outer frame 35. In the direction in which the radial ribs 34 extend, the radial ribs 34 include multiple radial segments with different curvatures.

[0098] The plurality of circumferential ribs 31 include a first circumferential rib 311 and a second circumferential rib 321. The cross-sectional area of the second circumferential rib 321 is larger than the cross-sectional area of the first circumferential rib 311. The second circumferential rib 321 is closer to the outer frame 35 relative to the center of the mesh cover portion 30. A notch 211 is formed on the trailing edge 21 of the blade 202 of the axial flow impeller 2. The projection of the notch 211 on the reference plane is a third projection. On the reference plane, at least a portion of the second circumferential rib 321 intersects with the third projection.

[0099] The mesh cover 30 includes a fixing portion 304, which is located between the auxiliary air outlet 302 and the outer frame 35. A positioning protrusion 3041 is provided on the side of the fixing portion 304 facing the mounting surface 121. The mounting surface 121 is provided with a positioning hole 1211, into which the positioning protrusion 3041 is inserted. A sealing flange 351 is formed on the side of the outer frame 35 facing the mounting surface 121, which seals against the mounting surface 121. A mounting groove 12 is formed on the front surface of the outdoor housing 1. The bottom surface of the mounting groove 12 constitutes the mounting surface 121, and the sealing flange 351 is received in the mounting groove 12.

[0100] 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.

[0101] 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.

[0102] According to the air conditioning system of the embodiment of the present invention, by being provided with the air conditioning outdoor unit 100, the air outlet noise of the air conditioning outdoor unit 100 is low, and the overall performance of the air conditioning system can be improved.

[0103] 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.

[0104] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0105] 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 not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0106] 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.

[0107] 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.

[0108] 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, the air outlet is located on the front side of the outdoor housing, and the front surface of the outdoor housing includes a mounting surface, the mounting surface surrounds the outer periphery of the air outlet; 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 is provided at the front side of the air outlet and is mounted on the mounting surface. The air outlet mesh cover comprises an outer frame and a mesh cover portion. The outer frame surrounds the outer periphery of the mesh cover portion. The mesh cover portion is located at the front side of the mounting surface and is spaced apart from the mounting surface in the front-to-rear direction to define an air outlet cavity between the air outlet mesh cover and the mounting surface.

2. The air conditioner outdoor unit according to claim 1, characterized in that: The distance between the mesh cover portion and the mounting surface in the front-to-back direction is a, and the size of the mesh cover portion in the front-to-back direction is b, where a>b.

3. The air conditioner outdoor unit according to claim 2, characterized in that: 1.2≤a / b≤1.

8.

4. The air conditioner outdoor unit according to claim 1, characterized in that: The entire mounting surface is located at the front side of the axial flow wind wheel.

5. The air conditioner outdoor unit according to claim 1, characterized in that: The mounting surface is a plane.

6. The air conditioner outdoor unit according to claim 1, characterized in that: The periphery of the air outlet constitutes the inner periphery of the mounting surface.

7. The air conditioner outdoor unit according to claim 1, characterized in that: The mesh cover portion includes a main air outlet portion and an auxiliary air outlet portion, wherein the auxiliary air outlet portion is located on the outer peripheral side of the main air outlet portion. In the front-to-back direction, the main air outlet portion is opposite to the air outlet, and the auxiliary air outlet portion is opposite to the mounting surface.

8. The air conditioner outdoor unit according to claim 7, characterized in that: The projection of the outer frame on the reference plane is a first projection, and the reference plane is perpendicular to the central axis of the axial flow wind wheel. The inner contour line of the first projection is a first contour line, and the first contour line is a square. The inscribed circle of the first contour line is a first base circle, and the circumscribed circle of the first contour line is a second base circle. The outer boundary of the air outlet area of the mesh cover is the air outlet outer boundary, and the air outlet outer boundary is composed of the first contour line and the third base circle. The third base circle is located between the first base circle and the second base circle. The first base circle defines the main air outlet part, and the first base circle and the air outlet outer boundary jointly define the auxiliary air outlet part. The third base circle is concentrically arranged with the first base circle, and the center of the first base circle is located on the central axis of the axial flow wind wheel.

9. The air conditioner outdoor unit according to claim 8, characterized in that: The distance between the third base circle and the first base circle is d1, and the distance between the third base circle and the second base circle is d2, where d1>d2.

10. The air conditioner outdoor unit according to claim 9, characterized in that: 1.2≤d1 / d2≤1.

8.

11. The air conditioner outdoor unit according to claim 8, wherein: A second projection of the air outlet on the reference plane, wherein the second projection is located within the first base circle.

12. The air conditioner outdoor unit according to claim 7, characterized in that: The mesh cover portion includes a fixing portion, which is located between the auxiliary air outlet and the outer frame. A positioning protrusion is provided on the side of the fixing portion facing the mounting surface. A positioning hole is provided on the mounting surface, and the positioning protrusion is inserted into the positioning hole.

13. The air conditioner outdoor unit according to claim 1, wherein: 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, and at least some of the circumferential ribs have different cross-sectional areas.

14. The air conditioner outdoor unit according to claim 13, wherein: The plurality of circumferential ribs include a first circumferential rib and a second circumferential rib, the cross-sectional area of the second circumferential rib is larger than the cross-sectional area of the first circumferential rib, and the second circumferential rib is closer to the outer frame relative to the center of the mesh cover.

15. The air conditioner outdoor unit according to claim 14, characterized in that: A notch is formed on the trailing edge of the blade of the axial flow wind wheel, and the projection of the notch on the reference plane is a third projection. On the reference plane, at least part of the second circumferential ribs intersects with the third projection.

16. The air conditioner outdoor unit according to claim 13, characterized in that: The mesh cover portion includes a central connecting plate, a plurality of circumferential ribs are located between the central connecting plate and the outer frame, one end of each of the radiating ribs is connected to the central connecting plate, and the other end of each of the radiating ribs is connected to the outer frame.

17. The air conditioner outdoor unit according to claim 13, wherein: In a direction from the center of the mesh cover to the outer frame, the radiation ribs extend along a curve, and in the extending direction of the radiation ribs, the radiation ribs include a plurality of radiation segments with different curvatures.

18. The air conditioner outdoor unit according to any one of claims 1 to 17, characterized in that: A sealing flange is formed on one side of the outer frame body facing the mounting surface, and the sealing flange is in sealing cooperation with the mounting surface.

19. The air conditioner outdoor unit according to claim 18, characterized in that: A mounting groove is formed on the front surface of the outdoor housing, the bottom surface of the mounting groove constitutes the mounting surface, and the sealing flange is accommodated in the mounting groove.

20. An air conditioning system, characterized in that: include: The air-conditioning outdoor unit according to any one of claims 1 to 19.

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