An outdoor unit for an air conditioner

Abstract

This invention discloses an outdoor unit for air conditioning, relating to the field of air conditioning technology, to solve the problem of high air resistance caused by the air outlet grille to the fan of the outdoor unit in existing technologies. The outdoor unit includes a casing, a fan, and an air outlet grille. A receiving cavity is formed within the casing; the fan is located in the receiving cavity. The air outlet grille includes an annular frame, multiple supporting ribs, and multiple circumferential ribs. The annular frame is fixed to the casing; the multiple supporting ribs are spaced apart circumferentially along the annular frame; the multiple circumferential ribs are spaced apart on the inner side of the annular frame, and the circumferential ribs are intersected with at least some of the supporting ribs. The axial dimension of the circumferential ribs in the annular frame is a first dimension, and the axial dimension of the supporting ribs in the annular frame is a second dimension. The first dimension is greater than or equal to 6 mm, and the ratio of the first dimension and the second dimension to the minimum radial dimension of the annular frame is greater than or equal to 0.011 and less than or equal to 0.014. This outdoor unit is used for heat exchange with air.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to an outdoor unit for an air conditioner. Background Technology

[0002] An air conditioner mainly consists of an outdoor unit and an indoor unit. The outdoor unit has an air outlet grille, which is mainly used to prevent external debris from entering the outdoor unit and affecting its normal operation, as well as to prevent people from touching the fan inside the outdoor unit and causing safety accidents. At the same time, the air generated by the fan in the outdoor unit needs to pass through the air outlet grille to reach the outside.

[0003] Currently, in order to reduce the production cost of air outlet grilles for outdoor air conditioning units, air outlet grilles are usually made of plastic. Due to limitations in mold technology, parameters such as the height and length of the ribs in plastic air outlet grilles are restricted, which in turn limits the airflow and creates greater resistance to the air blown out by the fan of the outdoor air conditioning unit.

[0004] To address the above situation, the current approach is to reduce the resistance of the air outlet grille to the air blown out by the outdoor unit by adjusting the gaps between the ribs in the grille. However, for air conditioners exported to Europe, the air outlet grille of the outdoor unit needs to meet the finger-testing requirements of children, which restricts the gaps between the ribs in the grille. As a result, the air outlet grille still generates significant resistance to the air blown out by the outdoor unit. Summary of the Invention

[0005] The embodiments of the present invention provide an outdoor air conditioner unit that solves the problem of high air resistance to the air blown out by the fan of the outdoor air conditioner unit in the prior art.

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

[0007] An outdoor unit for an air conditioner includes a casing, a fan, and an air outlet grille. The casing has an internal cavity and ventilation holes on its side walls. The fan is located within the cavity, and the ventilation holes are located on the fan's outlet side. The air outlet grille includes an annular frame, multiple supporting ribs, and multiple circumferential ribs. The annular frame is located at the ventilation holes and fixed to the casing. The multiple supporting ribs are spaced apart circumferentially along the annular frame, with a first end connected to the annular frame and a second end located inside the annular frame. The multiple circumferential ribs are all located inside the annular frame and are spaced apart. The circumferential ribs intersect with at least some of the supporting ribs to form a grille mesh. The axial dimension of the circumferential ribs along the annular frame is a first dimension, and the axial dimension of the supporting ribs along the annular frame is a second dimension. The first dimension is greater than or equal to 6 mm, and the ratio of the first dimension and the second dimension to the minimum radial dimension of the annular frame is greater than or equal to 0.011 and less than or equal to 0.014.

[0008] The outdoor unit of the air conditioner provided in this application, through the operation of a fan, can blow air from the housing cavity of the unit towards the ventilation hole, and then discharge the air to the outside of the housing cavity after flowing through the ventilation hole, thereby dissipating heat and cooling the housing cavity. An annular frame is provided at the ventilation hole and fixed to the housing. At least some supporting ribs and multiple circumferential ribs are intersected to form a grille. The grille is fixed to the inner side of the annular frame, thus forming an air outlet grille with the annular frame. Air flows through the air outlet grille as it passes through the ventilation hole and exits through the gaps in the grille.

[0009] Specifically, the circumferential ribs should have an axial dimension greater than or equal to 6mm on the annular frame to ensure the demolding requirements of the air outlet grille are met. Furthermore, the ratio of the axial dimension of the circumferential ribs and the axial dimension of the supporting ribs to the minimum radial dimension of the annular frame should be greater than or equal to 0.011 and less than or equal to 0.014. This allows the circumferential and supporting ribs to be as small as possible on the annular frame while still meeting the demolding requirements. This minimizes the axial dimension of the grille mesh, reducing the path length of the airflow through the air outlet grille and thus reducing the resistance of the air outlet grille to the airflow from the fan.

[0010] In some embodiments, the support ribs extend along the inner sidewall of the annular frame away from the outer sidewall of the annular frame, and the angle between the extension directions of two adjacent support ribs is greater than or equal to 7° and less than or equal to 11°. When using straight support ribs, the angle between the extension directions of two adjacent support ribs is kept within the above range so that the support ribs can support the circumferential ribs while minimizing the number of support ribs, thereby reducing the resistance of the support ribs to the wind blown by the fan.

[0011] In some embodiments, the annular frame is circular, and circumferential ribs extend circumferentially around the annular frame. Among the multiple supporting ribs, a portion is a first rib and the other portion is a second rib. The first ribs extend radially along the annular frame and are connected to the multiple circumferential ribs. The second ribs extend radially along the annular frame, and one second rib is located between two adjacent first ribs. The first end of the first rib and the first end of the second rib are both connected to the annular frame. The distance from the center of the annular frame to the end face of the second end of the second rib is a first distance. The first distance is greater than the distance from the center of the annular frame to the end face of the second end of the first rib. The ratio of the first distance to the radius of the annular frame is greater than or equal to 0.55 and less than or equal to 0.7. By reducing the length of the second rib, the resistance of the supporting ribs to the wind blown by the fan can be further reduced.

[0012] In some embodiments, the radial spacing between any two adjacent circumferential ribs is the same as the radial spacing between the outermost circumferential ribs and the annular frame among the plurality of circumferential ribs; among the plurality of circumferential ribs, the outermost circumferential ribs are connected to the plurality of support ribs, and for the outermost circumferential ribs, the portion between two adjacent support ribs is a first arc segment, the ratio of the arc length of the first arc segment to the radius of the annular frame is greater than or equal to 0.15 and less than or equal to 0.2; and / or, among the plurality of circumferential ribs between the second end of the second rib and the center of the annular frame, the portion of the outermost circumferential rib between two adjacent first ribs is a second arc segment, the ratio of the arc length of the second arc segment to the radius of the annular frame is greater than or equal to 0.15 and less than or equal to 0.2; with the above arrangement, while meeting the requirements for children to test their fingers, the gap between two adjacent circumferential ribs can be made as large as possible, thereby reducing the resistance of the circumferential ribs to the air blown by the fan.

[0013] In some embodiments, when the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.28 and less than 0.44, the radial dimension of at least some of the circumferential ribs gradually decreases in the direction away from the fan; when the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.44 and less than 0.78, the radial dimension of the circumferential rib remains unchanged in the direction away from the fan; when the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.78, the radial dimension of at least some of the axial ribs gradually increases in the direction away from the fan. When the air blown by the fan flows through the air outlet grille, the air volume and air outlet direction are different at different positions of the air outlet grille. Adjusting the radial dimension of the circumferential ribs at the corresponding positions according to the air volume and air outlet direction at different positions of the air outlet grille is beneficial for guiding the air at the corresponding positions, thereby facilitating the rapid flow of air through the air outlet grille and further reducing the resistance of the air outlet grille to the air blown by the fan.

[0014] In some embodiments, the projection of the axis of the circumferential rib onto the inner wall surface of the circumferential rib is a first straight line segment; when the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.28 and less than 0.44, the angle C between the extension of the first straight line segment and the axis of the circumferential rib is 75-160*(R / R1), where R is the radius of the circumferential rib and R1 is the first distance; when the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.78, the angle C between the extension of the first straight line segment and the axis of the circumferential rib is 50-64*(R / R1); adjusting the radial dimension of the circumferential rib according to the above angles can make the circumferential rib have a relatively good guiding effect on the air blown out by the fan.

[0015] In some embodiments, the sides of two adjacent support ribs close to each other are air guide surfaces; wherein, the air guide surfaces are perpendicular to the end faces of the annular frame; or, the air guide surfaces include a first side and a second side, in the axial direction of the annular frame, the second side is located on the side of the first side away from the fan, and along the rotation direction of the fan, the second side is located on one side of the first side; by setting the air guide surfaces, the support ribs can guide the air blown out by the fan, thereby further allowing the air blown out by the fan to flow quickly through the air outlet grille, so as to further reduce the resistance of the air outlet grille to the air blown out by the fan.

[0016] In some embodiments, a plurality of through holes are spaced apart on the outer side wall of the annular frame, which allows the air flowing to the edge of the air outlet grille to flow out through the through holes, thereby reducing the resistance of the annular frame to the air blown out by the fan.

[0017] In some embodiments, the ratio of the maximum axial dimension of the through hole along the annular frame to the radius of the annular frame is greater than or equal to 0.023 and less than or equal to 0.027, and the ratio of the maximum circumferential dimension of the through hole along the annular frame to the radius of the annular frame is greater than or equal to 0.09 and less than or equal to 0.1. Setting the through hole according to the above dimensions can increase the air volume of the through hole and further reduce the resistance of the annular frame to the air blown by the fan.

[0018] In some embodiments, the second dimension is smaller than the first dimension, and the end of the support rib away from the fan is located on the side of the circumferential rib away from the fan and close to the fan, while the end of the support rib close to the fan is located on the side of the circumferential rib close to the fan and away from the fan. This arrangement can reduce the resistance of the support rib to the air blown out by the fan and facilitate the demolding of the air outlet grille. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the outdoor unit of the air conditioner in the embodiments of this application;

[0020] Figure 2 This is one of the structural schematic diagrams of the air outlet grille in the embodiments of this application;

[0021] Figure 3 This is one of the cross-sectional schematic diagrams of the air outlet grille in the embodiments of this application;

[0022] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0023] Figure 5 This is the second schematic diagram of the air outlet grille in the embodiments of this application;

[0024] Figure 6 This is the third schematic diagram of the air outlet grille in the embodiments of this application;

[0025] Figure 7 This is the fourth schematic diagram of the air outlet grille in the embodiments of this application;

[0026] Figure 8 This is one of the partial structural schematic diagrams of the air outlet grille in the embodiments of this application;

[0027] Figure 9 for Figure 3 Enlarged schematic diagram of the structure at point B;

[0028] Figure 10 This is a schematic diagram illustrating the simulation effect of the air outlet grille's resistance to wind when the radial dimension of the fourth circumferential rib in this embodiment of the application is not adjusted.

[0029] Figure 11This is a schematic diagram illustrating the simulation effect of the air outlet grille's resistance to wind after adjusting the radial dimension of the fourth circumferential rib in the embodiments of this application.

[0030] Figure 12 This is a schematic diagram illustrating the simulation effect of the air outlet grille's resistance to wind when the radial dimension of the sixth circumferential rib in the embodiments of this application is not adjusted.

[0031] Figure 13 This is a schematic diagram illustrating the simulation effect of the air outlet grille's resistance to wind after adjusting the radial dimension of the sixth circumferential rib in the embodiments of this application.

[0032] Figure 14 This is a second cross-sectional view of the air outlet grille in an embodiment of this application;

[0033] Figure 15 for Figure 14 Enlarged schematic diagram of the structure at point D;

[0034] Figure 16 This is a second partial structural schematic diagram of the air outlet grille in an embodiment of this application;

[0035] Figure 17 This is a simulation diagram illustrating the resistance of the air outlet grille to the wind when no through holes are opened on the outer wall of the annular frame in this embodiment of the application.

[0036] Figure 18 This is a simulation diagram illustrating the resistance of the air outlet grille to wind after a through hole is opened on the outer wall of the annular frame in an embodiment of this application.

[0037] Figure 19 This is a cross-sectional schematic diagram of the outdoor unit of the air conditioner in an embodiment of this application;

[0038] Figure 20 This is a graph showing the influence of the ratio of the third dimension to the fifth dimension on the air volume at the same rotation speed in the embodiments of this application.

[0039] Figure 21 for Figure 19 Enlarged schematic diagram of the structure at point E in the middle.

[0040] Figure label:

[0041] 1-Casing; 11-Receiving cavity; 12-Ventilation hole; 13-Face panel; 131-First plate; 132-Second plate; 133-Third plate;

[0042] 2-Fan; 21-Motor; 22-Fan blade;

[0043] 3-Air outlet grille; 31-Annular frame; 311-Through hole; 32-Supporting rib; 321-First support rib; 322-Second support rib; 323-First rib; 324-Second rib; 325-Air guide surface; 3251-First side; 3252-Second side; 33-Circumferential rib; 331-Arc-shaped rib; 332-Circular rib; 333-First circumferential rib; 3331-First arc-shaped segment; 334-Second circumferential rib; 3341-Second arc-shaped segment; 335-Third circumferential rib; 336-Fourth circumferential rib; 337-Fifth circumferential rib; 338-Sixth circumferential rib; 34-Central fixing plate; 35-Sectional rib;

[0044] 4-Air guide ring; 41-Part 1; 42-Part 2;

[0045] H1 - First dimension; H2 - Second dimension; H3 - Third dimension; H4 - Fourth dimension; H5 - Fifth dimension; L - First distance. Detailed Implementation

[0046] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0047] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, when describing pipelines or channels, the terms "connection" and "linking" used in this application have the meaning of establishing electrical conductivity. The specific meaning needs to be understood in conjunction with the context.

[0050] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0051] Air conditioners are a common household appliance widely used in daily life. An air conditioner consists of an outdoor unit and an indoor unit. Through the cooperation between the outdoor unit and the indoor unit, the indoor air temperature can be regulated.

[0052] Specifically, when an air conditioner is cooling, the compressor in the outdoor unit compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure gaseous refrigerant then dissipates heat through the outdoor unit's heat exchanger, becoming a room-temperature, high-pressure liquid refrigerant. This room-temperature, high-pressure liquid refrigerant then enters the indoor unit, where it absorbs a large amount of heat through the indoor unit's heat exchanger, lowering the air temperature inside the indoor unit. The indoor unit's fan then blows the cooler air through a grille, further cooling the indoor air. When the air conditioner is heating, the compressor in the outdoor unit compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure gaseous refrigerant enters the indoor unit's heat exchanger, condenses and liquefies into a room-temperature, high-pressure liquid refrigerant, releasing a large amount of heat. This raises the air temperature inside the indoor unit, and the indoor unit's fan then blows the warmer air through a grille, further raising the indoor air temperature. The room-temperature, high-pressure liquid refrigerant is reduced in pressure by the throttling device and then enters the heat exchanger of the outdoor unit. The room-temperature, high-pressure liquid refrigerant evaporates and absorbs heat to become a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant enters the compressor in the outdoor unit to start the next cycle.

[0053] During operation, the outdoor unit of an air conditioner directs the air blown out by its fan through an air outlet grille to the outside air. The grille prevents external debris from entering the outdoor unit and affecting its normal operation, and also prevents people from coming into contact with the fan inside, thus improving the safety of the outdoor unit. However, the grille also creates resistance to the airflow from the outdoor unit's fan, resulting in a reduction in airflow and affecting the overall performance of the outdoor unit.

[0054] For air conditioners exported to Europe, the air outlet grille of the outdoor unit needs to meet the finger-testing requirements of children. Therefore, the gaps between the ribs in the air outlet grille are relatively small. Furthermore, to reduce production costs, the air outlet grilles of currently manufactured air conditioner outdoor units are usually made of plastic. Due to limitations in mold technology, the height and length of the ribs in plastic air outlet grilles are restricted, thus limiting the airflow. This, in turn, causes the air outlet grille to create significant resistance to the airflow from the outdoor unit's fan. To meet the airflow requirements, the fan speed needs to be increased, which in turn increases the fan's power, leading to higher operating costs.

[0055] Based on this, this application provides an outdoor unit for an air conditioner, such as... Figure 1 As shown, the outdoor unit of the air conditioner includes a casing 1, a fan 2 and an air outlet grille 3. The casing 1 has an internal cavity 11, and the fan 2 is located inside the cavity 11. A ventilation hole 12 is provided on the side wall of the casing 1, and the ventilation hole 12 is located on the air outlet side of the fan 2.

[0056] The fan 2 is used to discharge the high-temperature gas inside the casing 1 to the outside of the casing 1 through the ventilation hole 12, so as to dissipate heat and cool down the housing cavity 11 of the casing 1.

[0057] Specifically, such as Figure 1 As shown, the fan 2 includes a motor 21 and a fan blade 22. The motor 21 is connected to the housing 1, and the fan blade 22 is connected to the motor 21. The fan blade 22 is opposite to the ventilation hole 12. The motor 21 can drive the fan blade 22 to rotate, thereby causing the fan blade 22 to carry the tiny particles in the air (various gas molecules, dust, etc.) to move rapidly, thus forming wind.

[0058] The air on the side of the fan blade 22 closest to the ventilation hole 12 is continuously pushed away, which will create a low-pressure area on the side of the fan blade 22 closest to the ventilation hole 12. That is, the air pressure on the side of the fan closest to the ventilation hole 12 is lower than the air pressure on the side of the fan furthest from the ventilation hole 12. As a result, the air on the side of the fan blade 22 furthest from the ventilation hole 12 will continuously flow to the side of the fan blade 22 closest to the ventilation hole 12, thus forming a continuous wind.

[0059] With the fan running continuously, a steady stream of air flows to the ventilation hole 12 and is then discharged to the outside of the casing 1.

[0060] The air outlet grille 3 is located at the ventilation hole 12 and fixed to the casing 1. It is used to protect the fan 2 and improve the safety performance of the outdoor unit of the air conditioner. The air flows through the air outlet grille 3 as it flows through the ventilation hole 12 and is discharged outside the casing 1.

[0061] Specifically, such as Figure 2 As shown, the air outlet grille 3 includes an annular frame 31, multiple supporting ribs 32 and multiple circumferential ribs 33. The annular frame 31 is located at the ventilation hole 12 and fixed to the housing 1, and is used to support and fix the air outlet grille 3.

[0062] Multiple support ribs 32 are spaced apart circumferentially along the annular frame 31, with the first end of each support rib 32 connected to the annular frame 31 and the second end of each support rib 32 located inside the annular frame 31. Multiple circumferential ribs 33 are located inside the annular frame 31 and are spaced apart. The circumferential ribs 33 are cross-connected with at least some of the support ribs 32. A grid can be formed by connecting the multiple support ribs 32 and the multiple circumferential ribs 33.

[0063] As the air flows through the air outlet grille 3, some of the air will be blown out of the grille mesh to the outside of the casing 1, and some of the air will be blown onto the support ribs 32 and the circumferential ribs 33, thus causing the support ribs 32 and the circumferential ribs 33 to create resistance to the airflow.

[0064] To reduce the wind resistance of the supporting ribs 32 and circumferential ribs 33, such as Figure 3 and Figure 4 As shown, the circumferential rib 33 has a first dimension H1 in the axial direction of the annular frame 31, and the supporting rib 32 has a second dimension H2 in the axial direction of the annular frame 31. The first dimension H1 is greater than or equal to 6 mm, and the first dimension H1 and the second dimension H2 are equal to the minimum dimension of the annular frame 31 in the radial direction (e.g., ...). Figure 2 The ratios of the dimensions H3 shown are all greater than or equal to 0.011 and less than or equal to 0.014.

[0065] It should be noted that, for ease of description, the minimum radial dimension of the annular frame 31 can be named the third dimension H3, which is greater than or equal to 400mm and less than or equal to 800mm.

[0066] The first dimension H1 of the circumferential rib 33 is greater than or equal to 6mm, which can ensure the demolding requirements of the air outlet grille 3. On this basis, the ratio of the first dimension H1 of the circumferential rib 33 to the third dimension H3 of the annular frame 31 is greater than or equal to 0.011 and less than or equal to 0.014, and the ratio of the second dimension H2 of the supporting rib 32 to the third dimension H3 of the annular frame 31 is greater than or equal to 0.011 and less than or equal to 0.014. After determining the size of the annular frame 31, that is, after determining the size of the air outlet grille 3, the height of the circumferential rib 33 and the supporting rib 32 in the axial direction of the annular frame 31 is minimized, thereby minimizing the length of the gap in the grille mesh in the axial direction of the annular frame 31.

[0067] This reduces the length of the path through which the wind flows through the gaps in the grille, thereby reducing the resistance the wind encounters as it flows through the gaps. This reduces the resistance of the air outlet grille 3 to the air blown out by the fan 2 of the outdoor unit of the air conditioner, allowing the fan 2 to meet the air volume requirements at a lower speed, thus reducing the operating power of the fan 2 and lowering its operating cost.

[0068] Based on this, in order to facilitate demolding, the second dimension H2 can be smaller than the first dimension H1, and the end of the support rib 32 away from the fan 2 is located on the side of the circumferential rib 33 away from the fan 2 and close to the fan 2, and the end of the support rib 32 close to the fan 2 is located on the side of the circumferential rib 33 close to the fan 2 and away from the fan 2.

[0069] For example, the second dimension H2 can be 0.4 mm smaller than the first dimension H1, wherein the distance between the end face of the supporting rib 32 away from the fan 2 and the end face of the circumferential rib 33 away from the fan 2 is 0.2 mm, and the distance between the end face of the supporting rib 32 close to the fan 2 and the end face of the circumferential rib 33 close to the fan 2 is 0.2 mm.

[0070] Among them, such as Figure 2 As shown, the grid can also include a central fixing plate 34, which is disposed on the inner side of the annular frame 31 and is used to fix the grid together with the annular frame 31.

[0071] For example, such as Figure 5As shown, the annular frame 31 is an elliptical ring, the central fixing plate 34 is an ellipse matching the shape of the annular frame 31, the supporting ribs 32 are arc-shaped, and the first ends of the multiple supporting ribs 32 are all connected to the annular frame 31, and the second ends of the multiple supporting ribs 32 are all connected to the central fixing plate 34. Among the multiple circumferential ribs 33, one part is an arc-shaped rib 331, and the other part is a circular rib 332. The circular rib 332 and the arc-shaped rib 331 are concentrically arranged, and the circular rib 332 is connected to the multiple supporting ribs 32. The part of the arc-shaped rib 331 located outside the circular rib 332 is connected to the annular frame 31 and to some of the supporting ribs 32. The part of the arc-shaped rib 331 located inside the circular rib 332 is connected to the central fixing plate 34 and to some of the supporting ribs 32.

[0072] Among them, the third dimension H3 of the annular frame 31 is the length of the minor axis of the annular frame 31 of the elliptical ring.

[0073] For example, such as Figure 6 As shown, the annular frame 31 is circular, and the central fixing plate 34 is circular and concentrically arranged with the annular frame 31. The air outlet grille 3 also includes multiple partition ribs 35. One end of the partition rib 35 is connected to the annular frame 31, and the other end of the partition rib 35 is connected to the central fixing plate 34. A fan-shaped area is formed between two adjacent partition ribs 35. The support ribs 32 are straight, and one section of the circumferential ribs 33 is straight, while the other section is curved. Multiple circumferential ribs 33 and multiple support ribs 32 are distributed in multiple fan-shaped areas. In one fan-shaped area, the circumferential ribs 33 and support ribs 32 are intersected and connected. One end of the circumferential rib 33 is connected to the annular frame 31, and the other end of the circumferential rib 33 is connected to one partition rib 35. The first end of the support rib 32 is connected to the annular frame 31, and the second end of the support rib 32 is connected to another partition rib 35.

[0074] Among them, the third dimension H3 of the annular frame 31 is the diameter of the annular frame 31.

[0075] For example, such as Figure 7As shown, the annular frame 31 is circular, the central fixing disk 34 is circular and concentrically arranged with the annular frame 31, the supporting ribs 32 are straight, and the circumferential ribs 33 are circular; multiple circumferential ribs 33 are concentrically arranged and all concentric with the central fixing disk 34, and all multiple circumferential ribs 33 are located between the central fixing disk 34 and the annular frame 31. Multiple supporting ribs 32 extend radially along the annular frame 31, and one part of the supporting ribs 32 is the first supporting rib 321, and the other part is... The second support rib 322, the first end of the first support rib 321 is connected to the annular frame 31, the second end of the first support rib 321 is connected to the central fixing plate 34, a plurality of first support ribs 321 are arranged at intervals along the circumference of the annular frame 31, the first support ribs 321 are all connected to a plurality of circumferential ribs 33, and three second support ribs 322 arranged in a triangular pattern are arranged between any two adjacent first support ribs 321, the second support ribs 322 are connected to a portion of the circumferential ribs 33.

[0076] Among them, the third dimension H3 of the annular frame 31 is the diameter of the annular frame 31.

[0077] For example, such as Figure 2 As shown, the annular frame 31 is circular, the central fixing disk 34 is circular and is concentric with the annular frame 31, and the supporting rib 32 extends along the inner sidewall of the annular frame 31 away from the outer sidewall of the annular frame 31, that is, the supporting rib 32 is straight. The extension direction of the supporting rib 32 can be consistent with the radial direction of the annular frame 31, or it can be at a certain angle to the radial direction of the annular frame 31. Preferably, the extension direction of the supporting rib 32 is consistent with the radial direction of the annular frame 31.

[0078] At this point, the angle between the extending directions of two adjacent supporting ribs 32 can be adjusted (e.g., Figure 8 The angle α shown is greater than or equal to 7° and less than or equal to 11°. For example, the included angle between the extension directions of two adjacent support bars 32 can be 7°, 8°, 9°, 10°, 11°, etc.

[0079] The included angle between the extension directions of two adjacent support ribs 32 can be equal or unequal. Preferably, the included angle between the extension directions of two adjacent support ribs 32 is equal, that is, multiple support ribs 32 are arranged at equal intervals along the circumference of the annular frame 31.

[0080] By ensuring that the included angle between the extension directions of two adjacent support ribs 32 is within the aforementioned range, the support ribs 32 can support the circumferential ribs 33, ensuring that the circumferential ribs 33 are not easily deformed in their radial direction. This allows the gaps between the circumferential ribs 33 to meet the requirements for children's finger testing, while reducing the number of support ribs 32. This avoids excessive support ribs 32 affecting the airflow of the air outlet grille 3, thereby reducing the resistance of the support ribs 32 to the air blown out by the fan 2.

[0081] Furthermore, the circumferential ribs 33 extend around the circumference of the annular frame 31, that is, the circumferential ribs 33 are circular; multiple circumferential ribs 33 can be concentrically arranged, and all of them are concentrically arranged with the annular frame 31, and multiple circumferential ribs 33 are located between the central fixing plate 34 and the annular frame 31.

[0082] Since the circumferential ribs 33 are concentrically arranged, the diameter of the circumferential ribs 33 near the central fixed plate 34 is smaller. The part of the circumferential ribs 33 located between two adjacent support ribs 32 has a smaller circumferential dimension. It is not necessary to set too many support ribs 32 at this position so that the circumferential ribs 33 can meet the requirements of children's finger testing at this position. If multiple support strips are connected to all circumferential ribs 33, the gap between two adjacent support ribs 32 will be relatively small in the part near the central fixed plate 34, which will cause greater resistance to the air blown out by the fan 2.

[0083] Therefore, the length of some of the multiple support ribs 32 can be less than the length of another part of the support ribs 32.

[0084] Specifically, such as Figure 8 As shown, among the multiple supporting ribs 32, one part is the first rib 323 and the other part is the second rib 324. The first rib 323 and the second rib 324 both extend radially along the annular frame 31, and the first end of the first rib 323 and the first end of the second rib 324 are both connected to the annular frame 31. The second end of the first rib 323 is connected to the central fixing plate 34. The first rib 323 is connected to multiple circumferential ribs 33.

[0085] A second rib 324 is located between two adjacent first ribs 323. The distance from the center of the annular frame 31 to the end face of the second end of the second rib 324 is a first distance L. The first distance L is greater than the distance from the center of the annular frame 31 to the end face of the second end of the first rib 323 (e.g., ...). Figure 8 The distance L1 shown in the figure indicates that the length of the second rib 324 is less than the length of the first rib 323.

[0086] And make the first distance L equal to the radius of the annular border 31 (e.g.) Figure 8The ratio of the radius R1 shown is greater than or equal to 0.55 and less than or equal to 0.7. The ratio of the first distance L to the radius of the annular frame 31 can increase as the radius R1 of the annular frame 31 increases.

[0087] With the radius R1 of the annular frame 31 determined, the first distance L is determined by the above ratio, which in turn determines the length of the second rib 324. At this length, the second rib 324 is relatively short, and the second rib 324 can cooperate with the first rib 323 to fix the axial rib, so that the gap between the circumferential ribs 33 meets the requirements for children to test their fingers.

[0088] By reducing the length of the second rib 324, the resistance of the second rib 324 to the wind in the air outlet grille 3 can be further reduced, thereby further reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0089] It should be noted that the angle α between the extension directions of two adjacent support ribs 32 is the angle between the extension direction of the adjacent first rib 323 and the extension direction of the second rib 324.

[0090] Based on this, in order to facilitate the setting of the circumferential ribs 33, the radial spacing between any two adjacent circumferential ribs 33 can be the same as the radial spacing between the outermost circumferential ribs 33 and the annular frame 31 among the multiple circumferential ribs 33.

[0091] In this way, the position of each circumferential rib 33 can be determined by determining the positional relationship between the outermost circumferential rib 33 and the annular frame 31 between the annular frame 31 and the central fixed plate 34, and / or by determining the positional relationship between the outermost circumferential rib 33 and the annular frame 31 between the second end of the second rib 324 and the center of the annular frame 31.

[0092] For ease of description, the outermost circumferential rib 33 among the multiple circumferential ribs 33 between the annular frame 31 and the central fixed plate 34 can be named the first circumferential rib 333, and the outermost circumferential rib 33 among the multiple circumferential ribs 33 between the second end of the second rib 324 and the center of the annular frame 31 can be named the second circumferential rib 334.

[0093] Specifically, in some embodiments, such as Figure 8 As shown, among the multiple circumferential ribs 33 between the annular frame 31 and the central fixed plate 34, the outermost circumferential rib 33 (i.e. the first circumferential rib 333) is connected to multiple supporting ribs 32, and for the outermost circumferential rib 33 (i.e. the first circumferential rib 333), the part located between two adjacent supporting ribs 32 is the first arc segment 3331.

[0094] It should be noted that the two adjacent support bars 32 refer to the adjacent first bar 323 and second bar 324.

[0095] The ratio of the arc length of the first arc segment 3331 to the radius R1 of the annular frame 31 can be greater than or equal to 0.15 and less than or equal to 0.2. The ratio of the arc length of the first arc segment 3331 to the radius R1 of the annular frame 31 increases as the radius of the annular frame 31 increases.

[0096] After determining the radius R1 of the annular frame 31, the arc length of the first arc segment 3331 can be determined using this ratio. Since the included angle between the extension directions of two adjacent supporting ribs 32 has been determined, the radius of the first arc segment 3331 can be determined, which means the radius of the first circumferential rib 333 can be determined. Thus, the distance between the first circumferential rib 333 and the annular frame 31 can be determined, and the distance between adjacent circumferential ribs 33 can be determined.

[0097] In other embodiments, among the plurality of circumferential ribs 33 between the second end of the second rib 324 and the center of the annular frame 31, the outermost circumferential rib 33 (i.e., the second circumferential rib 334) is a second arc-shaped segment 3341 located between two adjacent first ribs 323. The ratio of the arc length of the second arc-shaped segment 3341 to the radius R1 of the annular frame 31 is greater than or equal to 0.15 and less than or equal to 0.2. The ratio of the arc length of the second arc-shaped segment 3341 to the radius R1 of the annular frame 31 increases as the radius R1 of the annular frame 31 increases.

[0098] In general, among the circumferential ribs 33 located between the second end of the second rib 324 and the annular frame 31, the innermost circumferential rib 33 is usually connected to the end of the second end of the second rib 324. For ease of description, the innermost circumferential rib 33 located between the second end of the second rib 324 and the annular frame 31 can be named the third circumferential rib 335.

[0099] Therefore, after determining the radius R1 of the annular frame 31, the arc length of the second arc segment 3341 can be determined using the aforementioned proportions. Since the included angle between the extension directions of two adjacent supporting ribs 32 has been determined, the included angle between two adjacent first ribs 323 can also be determined. Thus, the radius of the second arc segment 3341 can be determined, which means the radius of the second circumferential rib 334 can be determined. With the length of the second rib 324 determined, the radius of the third circumferential rib 335 can also be determined, thereby determining the distance between the second circumferential rib 334 and the third circumferential rib 335, and further determining the distance between adjacent circumferential ribs 33.

[0100] The distance between two adjacent circumferential ribs 33 is determined by the ratio of the arc length of the first arc segment 3331 to the radius of the annular frame 31, and / or the arc length of the second arc segment 3341 to the radius of the annular frame 31. This allows the air outlet grille 3 to meet the requirements for children's finger testing while maintaining a relatively large distance between adjacent circumferential ribs 33. This facilitates the flow of air blown by the fan 2 through the gap between adjacent circumferential ribs 33, thereby reducing the resistance of the air outlet grille 3 to the air blown by the fan 2.

[0101] In some embodiments, as the fan blades 22 in the fan 2 rotate, they drive the air in the housing cavity 11 of the housing 1 to flow towards the ventilation hole 12. The air will rotate with the fan blades 22 and collide with the side wall of the housing 1 and the air outlet grille 3. As a result, when the air flows to the air outlet grille 3, the air volume is different at different positions of the air outlet grille 3 and the direction of airflow is also different. Therefore, when the radial dimensions of multiple circumferential ribs 33 are set in the same way, it will affect the air volume of the air outlet grille 3.

[0102] Based on this, the radial dimensions of the circumferential ribs 33 at different positions can be adjusted according to the air volume and direction at different positions of the air outlet grille 3.

[0103] Specifically, when the ratio of the radius of the circumferential rib 33 to the first distance L is greater than or equal to 0.28 and less than 0.44, the radial dimension of at least a portion of the circumferential rib 33 gradually decreases in the direction away from the fan 2.

[0104] It should be noted that, as Figure 9 As shown, the circumferential rib 33 whose radius to the first distance L is within the above range can be named the fourth circumferential rib 336. The fourth circumferential rib 336 is usually located near the annular frame 31. The opening of the end of the fourth circumferential rib 336 near the fan 2 is smaller than the opening of the end of the fourth circumferential rib 336 away from the fan 2, so that the fourth circumferential rib 336 can guide the air flowing to the location of the fourth circumferential rib 336.

[0105] like Figure 10 As shown, when the radial dimension of the fourth circumferential rib 336 is not adjusted, the wind will generate a large vortex when it collides with the air outlet grille 3 at the location of the fourth circumferential rib 336, thus causing a large resistance to the wind.

[0106] like Figure 11 As shown, after the fourth circumferential rib 336 is adjusted according to the above proportion, the vortex generated by the wind at the location of the fourth circumferential rib 336 is significantly reduced due to the wind's guidance by the fourth circumferential rib 336. The wind experiences less resistance at this location, and the flow velocity is more stable.

[0107] When the ratio of the radius of the circumferential stiffener 33 to the first distance L is greater than or equal to 0.44 and less than 0.78, the radial dimension of the circumferential stiffener 33 remains unchanged in the direction away from the fan 2.

[0108] It should be noted that the circumferential rib 33 whose radius to the first distance L is within the above range can be named the fifth circumferential rib 337. The fifth circumferential rib 337 is usually located in the middle position between the annular frame 31 and the central fixed plate 34. The airflow at this position is relatively gentle. Therefore, the radial dimension of the fifth circumferential rib 337 does not need to be changed.

[0109] When the ratio of the radius of the circumferential stiffener 33 to the first distance L is greater than or equal to 0.78, the radial dimension of at least some of the axial stiffeners gradually increases in the direction away from the fan 2.

[0110] It should be noted that the circumferential rib 33 whose radius to the first distance L is within the above range can be named the sixth circumferential rib 338. The sixth circumferential rib 338 is usually located near the central fixed plate 34. The opening of the end of the sixth circumferential rib 338 near the fan 2 is larger than the opening of the end of the sixth circumferential rib 338 away from the fan 2, so that the sixth circumferential rib 338 can guide the air flowing to the location of the sixth circumferential rib 338.

[0111] like Figure 12 As shown, when the radial dimension of the sixth circumferential rib 338 is not adjusted, the wind collides more severely with the air outlet grille 3 at the location of the sixth circumferential rib 338, and a large vortex is generated near the central fixed plate 34, which causes greater resistance to the wind.

[0112] like Figure 13 As shown, after the sixth circumferential rib 338 is adjusted according to the above proportion, the vortex generated by the wind at the location of the sixth circumferential rib 338 is significantly reduced due to the wind being guided by the sixth circumferential rib 338. The wind experiences less resistance at this location, and the flow velocity is more stable.

[0113] It should be noted that when the ratio of the radius of the circumferential rib 33 to the first distance L is less than 0.28, the radius of the circumferential rib 33 is smaller than the radius of the central fixing plate 34. In this case, only the central fixing plate 34 is set, and the circumferential rib 33 cannot be set. Furthermore, when the ratio of the radius of the circumferential rib 33 to the first distance L is equal to 0.28, the circumferential rib 33 is fixed to the circumferential wall of the central fixing plate 34.

[0114] Based on this, in order to improve the air guiding effect of the circumferential ribs 33 at various locations on the corresponding positions of the air outlet grille 3, the projection of the axis of the circumferential ribs 33 on the inner wall surface of the circumferential ribs 33 can be the first straight line segment, that is, the radial dimension of the fourth circumferential rib 336 decreases uniformly from the end closer to the fan 2 to the end farther away from the fan 2, and the radial dimension of the sixth circumferential rib 338 increases uniformly from the end closer to the fan 2 to the end farther away from the fan 2.

[0115] Specifically, such as Figure 9 As shown, when the ratio of the radius of the circumferential stiffener 33 to the first distance L is greater than or equal to 0.28 and less than 0.44, the angle C1 between the extension of the first straight line segment and the axis of the circumferential stiffener 33 is 75-160*(R / L), where R is the radius of the circumferential stiffener 33 and L is the first distance.

[0116] It should be noted that at this time, the first straight line segment is the projection of the axis of the fourth circumferential rib 336 onto the inner wall surface of the fourth circumferential rib 336.

[0117] When the ratio of the radius of the circumferential stiffener 33 to the first distance L is greater than or equal to 0.78, the angle C2 between the extension of the first straight line segment and the axis of the circumferential stiffener 33 is 50-64*(R / L).

[0118] It should be noted that, at this time, the first straight line segment is the projection of the axis of the sixth circumferential rib 338 onto the inner wall surface of the sixth circumferential rib 338.

[0119] The radial dimensions of the fourth circumferential rib 336 and the sixth circumferential rib 338, calculated by the above formula, can effectively guide the airflow to the corresponding position of the air outlet grille 3, thereby greatly reducing the resistance of the air outlet grille 3 to the air blown out by the fan 2.

[0120] In some embodiments, in order to enable the support ribs 32 to also guide the airflow onto the air outlet grille 3, such as... Figure 14 and Figure 15 As shown, the sides of two adjacent support ribs 32 that are close to each other are air guide surfaces 325. The air guide surfaces 325 are perpendicular to the end face of the annular frame 31. This is suitable for situations where the fan 2 rotates at a low speed.

[0121] Alternatively, the air guide surface 325 includes a first side 3251 and a second side 3252. In the axial direction of the annular frame 31, the second side 3252 is located on the side of the first side 3251 away from the fan 2, along the rotation direction of the fan 2 (e.g., ...). Figure 15 In the direction X), the second side 3252 is located on one side of the first side 3251.

[0122] In other words, the air guide surface 325 forms a certain angle with the end face of the annular frame 31 (e.g., Figure 15 The angle β shown is used to guide the airflow from the fan 2, and the inclination direction of the air guide surface 325 relative to the annular frame 31 is suitable for guiding the airflow from the fan 2. Specifically, the included angle β between the air guide surface 325 and the end face of the annular frame 31 is greater than or equal to 80° and less than 90°. For example, the included angle between the air guide surface 325 and the end face of the annular frame 31 can be 80°, 82°, 84°, 85°, 86°, 89°, etc.

[0123] The included angle between the air guide surface 325 and the end face of the annular frame 31 is within the above range, which makes the air guide surface 325 more conducive to guiding the air blown out by the fan 2, thereby reducing the resistance of the air outlet grille 3 to the air blown out by the fan 2.

[0124] In some embodiments, in order to allow the air flowing to the edge of the air outlet grille 3 to flow quickly through the air outlet grille 3, such as... Figure 14 As shown, the dimension of the annular frame 31 in its axial direction can be a fourth dimension H4, which is greater than or equal to 5mm and less than or equal to 60mm. For example, the fourth dimension H4 can be 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, etc.

[0125] If the fourth dimension H4 of the ring frame 31 is too small, it will increase the manufacturing difficulty of the ring frame 31 and reduce the strength of the ring frame 31, making the ring frame 31 easy to be damaged during use.

[0126] Since the grille is usually fixed to the end of the annular frame 31 away from the fan 2, the fourth dimension H4 of the annular frame 31 being greater than 60mm will result in an excessive distance between the grille and the fan 2. This will cause the wind to be too dispersed after it hits the grille, resulting in greater resistance to the wind and greater loss of air volume.

[0127] The fourth dimension H4 of the annular frame 31 is within the above range, which enables the annular frame 31 to have relatively low wind resistance.

[0128] Based on this, such as Figure 16 As shown, multiple through holes 311 can be spaced apart on the outer wall of the annular frame 31 so that the air flowing to the edge of the air outlet grille 3 can flow out through the through holes 311 on the annular frame 31, thereby further reducing the resistance of the annular frame 31 to the air blown out by the fan 2.

[0129] Specifically, the maximum dimension of the through hole 311 along the axial direction of the annular frame 31 (e.g.) Figure 16The ratio of dimension L2 (shown in the figure) to the radius R1 of the annular frame 31 is greater than or equal to 0.023 and less than or equal to 0.027. The maximum dimension of the through hole 311 along the circumference of the annular frame 31 (e.g., ...) is... Figure 16 The ratio of dimension L3 shown in the figure to the radius R1 of the annular border 31 is greater than or equal to 0.09 and less than or equal to 0.1.

[0130] It should be noted that the through hole 311 can be a round hole, an elliptical hole, a square hole, an irregularly shaped hole, a wavy hole, etc. Preferably, the through hole 311 is a wavy hole, which can make the area of ​​the through hole 311 larger, thus making it more conducive to the flow of air out of the through hole 311.

[0131] like Figure 17 As shown, when no through hole 311 is opened on the outer wall of the annular frame 31, the wind flowing to the annular frame 31 is blocked by the annular frame 31, which will impact the annular frame 31 and the circumferential ribs 33 and supporting ribs 32 near the annular frame 31, thus affecting the wind speed at that point and causing resistance to the wind flow at that point.

[0132] like Figure 18 As shown, after the through hole 311 is opened on the annular frame 31, the impact of the wind flowing to the annular frame 31 with the annular frame 31 and the circumferential ribs 33 and supporting ribs 32 near the annular frame 31 is significantly reduced, the wind velocity at that point is also improved, and the resistance of the annular frame 31 to the wind is reduced.

[0133] In some embodiments, such as Figure 1 As shown, the outdoor unit of the air conditioner also includes an air guide ring 4, which is disposed within the receiving cavity 11 and located at the ventilation hole 12. The air guide ring 4 is connected to the casing 1 and extends circumferentially around the ventilation hole 12. The air guide ring 4 is used to guide the air blown out by the fan 2 to the ventilation hole 12 and the air outlet grille 3, so that the air can flow out from the ventilation hole 12 and the air outlet grille 3 to the outside of the casing 1.

[0134] In order to ensure that the air guide ring 4 can smoothly guide the air blown by the fan 2 to the air outlet grille 3, and to reduce the impact of the air guide ring 4 on the air blown by the fan 2, such as Figure 19 As shown, the minimum radial dimension of the air guide ring 4 can be the fifth dimension H5, and the ratio of the third dimension H3 (the minimum radial dimension of the annular frame 31) to the fifth dimension H5 can be greater than or equal to 1 and less than or equal to 1.25.

[0135] It should be noted that the annular frame 31 is located at the edge of the air outlet grille 3, and the minimum radial dimension of the annular grille is the minimum radial dimension of the air outlet grille 3.

[0136] The ratio of the third dimension H3 to the fifth dimension H5 is within the above range. The third dimension H3 of the annular frame 31 is greater than the fifth dimension H5 of the air guide ring 4. Therefore, the air generated by the fan 2 can directly reach the air outlet grille 3 as it is guided by the air guide ring 4 and blown towards the air outlet grille 3. The air is not obstructed by the air guide ring 4 or the casing 1 before reaching the air outlet grille 3.

[0137] At the same time, the third dimension H3 is larger than the fifth dimension H5, so that part of the air that was originally blown to the air outlet grille 3 near the annular frame 31 is blown onto the grille of the air outlet grille 3 and blown out of the casing 1 through the gaps in the grille. This can further reduce the resistance of the annular frame 31 to the wind, thereby further reducing the resistance of the air outlet grille 3 to the wind blown out by the fan 2.

[0138] It is understandable that when the third dimension H3 increases while the fifth dimension H5 remains unchanged, the increase in the third dimension H3 relative to the fifth dimension H5 is significant. The coverage area of ​​the airflow from the guide ring 4 to the outlet grille 3 remains unchanged. The increased area of ​​the outlet grille 3 causes some of the airflow that originally reached the area near the annular frame 31 of the outlet grille 3 to be blown onto the grille mesh and out of the casing 1 through the gaps in the mesh. This further reduces the resistance of the annular frame 31 to the airflow, thereby further reducing the resistance of the outlet grille 3 to the airflow blown by the fan 2.

[0139] When the third dimension H3 remains unchanged and the fifth dimension H5 decreases, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of ​​the air blown from the air guide ring 4 to the air outlet grille 3 decreases, while the area of ​​the air outlet grille 3 remains unchanged. This causes part of the air that was originally blown to the area near the annular frame 31 of the air outlet grille 3 to be blown onto the grille mesh and blown out of the casing 1 through the gaps in the grille mesh, thereby further reducing the resistance of the annular frame 31 to the wind, and further reducing the resistance of the air outlet grille 3 to the air blown by the fan 2.

[0140] When the third dimension H3 increases and the fifth dimension H5 decreases, the increase in the third dimension H3 relative to the fifth dimension H5 results in a decrease in the coverage area of ​​the air blown from the air guide ring 4 to the air outlet grille 3, while the area of ​​the air outlet grille 3 increases. This causes some of the air that was originally blown to the area near the annular frame 31 of the air outlet grille 3 to be blown onto the grille mesh and blown out of the casing 1 through the gaps in the grille mesh, thereby further reducing the resistance of the annular frame 31 to the wind, and further reducing the resistance of the air outlet grille 3 to the wind blown by the fan 2.

[0141] As shown in Table 1 below, the dimensional relationship between the air guide ring 4 and the annular frame 31 is simulated, and the air volume of the outdoor unit of the air conditioner is 4626m³. 3 At a speed of / h, the fan speed of fan 2 in scheme 1 is 681 rpm, while the fan speed of fan 2 in scheme 2 is 634 rpm. To achieve the same air volume (4626 m³ / h), 3 / h), the fan speed required for Scheme 2 is 47 rpm lower than that required for Scheme 1. Meanwhile, the noise generated by the outdoor unit of the air conditioner in Scheme 1 is 56.8dB, while the noise generated by the outdoor unit of the air conditioner in Scheme 2 is 54.7dB. The noise generated by the outdoor unit of the air conditioner in Scheme 2 is 2.1dB lower than that generated by the outdoor unit of the air conditioner in Scheme 1.

[0142] Comparing the data of Scheme 1 and Scheme 2, in Scheme 1, the fifth dimension H5 of the air guide ring 4 is 616mm, the third dimension H3 of the annular frame 31 is 630mm, the diameter of the largest circle formed by the rotation of the fan blade 22 of the fan 2 is the first diameter R2, which is 600mm, and the dimension of the annular frame 31 in its axial direction (i.e., the fourth dimension H4) is 30mm. In Scheme 2, the fifth dimension H5, the first diameter R2, and the fourth dimension H4 are consistent with those of Scheme 1, and the third dimension H3 is 670mm, which is 40mm larger than the third dimension H3 in Scheme 1. The ratio of the third dimension H3 to the fifth dimension H5 in Scheme 2 is 0.065 larger than the ratio of the third dimension H3 to the fifth dimension H5 in Scheme 1.

[0143] The simulation results show that the diffusion range of the wind blowing out of the air guide ring 4 remains unchanged. The increase of the third dimension H3 of the annular frame 31 relative to the fourth dimension H4 of the air guide ring 4 can reduce the air volume loss caused by the air outlet grille 3, so that when the outdoor unit of the air conditioner achieves the same air volume, the required fan speed of the fan 2 is lower and the noise generated is lower.

[0144] Table 1:

[0145]

[0146] Understandably, the air generated by the fan 2 is guided by the air guide ring 4 to the air outlet grille 3. The resistance of the air outlet grille 3 is reduced, resulting in less air volume loss, which increases the air volume of the outdoor unit of the air conditioner and thus improves the heat exchange efficiency of the outdoor unit of the air conditioner.

[0147] By improving the relationship between the minimum radial dimension of the annular frame 31 of the outdoor unit and the minimum radial dimension of the air guide ring 4, compared with the unimproved outdoor unit, the improved outdoor unit exhibits less airflow loss. To achieve the same airflow, the fan 2 needs to reach a lower speed, thus reducing noise while maintaining the same airflow and heat exchange efficiency. This improvement in airflow while reducing noise enhances the user experience.

[0148] When the ratio of the third dimension H3 to the fifth dimension H5 is less than 1, that is, the minimum radial dimension of the annular frame 31 is less than the minimum radial dimension of the air guide ring 4, and the annular frame 31 is set at the ventilation hole 12, the size of the ventilation hole 12 matches that of the annular frame 31, therefore, the minimum radial dimension of the ventilation hole 12 is also less than the minimum radial dimension of the air guide ring 4. When the air blown by the fan 2 flows towards the air outlet grille 3, part of the air will be blown onto the inner wall of the housing cavity 11 of the housing 1, and the other part will be blown onto the air outlet grille 3. The air blown onto the inner wall of the housing cavity 11 of the housing 1 cannot be blown out through the housing 1, which increases the resistance of the air blown by the fan 2, thereby increasing the air volume loss and reducing the air volume.

[0149] When the ratio of the third dimension H3 to the fifth dimension H5 is greater than 1.25, that is, the minimum radial dimension of the annular frame 31 is greater than the minimum radial dimension of the air guide ring 4, as the minimum radial dimension of the annular frame 31 increases relative to the minimum radial dimension of the air guide ring 4, the air volume blown out from the gap in the grid of the air outlet grille 3 no longer increases, and the air volume blown to the air outlet grille 3 near the annular frame 31 no longer decreases. This has no significant effect on reducing the resistance of the air outlet grille 3 to the wind; moreover, it will increase the production cost of the air outlet grille 3 and reduce its own strength.

[0150] In some embodiments, such as Figure 20 As shown, when the ratio of the third dimension H3 to the fifth dimension H5 is greater than or equal to 1.05 and less than or equal to 1.15, the exponential increase in the air volume blown by the fan 2 onto the air outlet grille 3 increases. This makes the air generated by the fan 2 more significantly reduced in resistance after being guided to the air outlet grille 3 by the air guide ring 4. Under the premise of controlling production costs and ensuring its own strength, the resistance of the air outlet grille 3 to the air blown by the fan 2 is reduced.

[0151] In some embodiments, such as Figure 19 As shown, the ratio of the fifth dimension H5 (the minimum radial dimension of the air guide ring 4) to the first diameter R2 (the diameter of the largest circle formed by the rotation of the fan blade 22 of the fan 2) is greater than or equal to 1.02 and less than or equal to 1.1, and the difference between the fifth dimension H5 and the first diameter R2 is greater than or equal to 12mm.

[0152] The ratio of the fifth dimension H5 to the first diameter R2 is greater than or equal to 1.02, and the difference between the fifth dimension H5 and the first diameter R2 is greater than or equal to 12mm. This ensures that the diameter of the largest circle formed by the rotation of the fan blade 22 is slightly smaller than the minimum radial dimension of the air guide ring 4, which can meet the assembly requirements of the fan blade 22, allowing the fan blade 22 to be installed inside the air guide ring 4, and preventing the fan blade 22 from colliding with the air guide ring 4 during operation.

[0153] The ratio of the fifth dimension H5 to the first diameter R2 is less than or equal to 1.1. The diameter of the largest circle formed by the rotation of the fan blade 22 is smaller than the minimum radial dimension of the air guide ring 4. The difference in size between the two ensures that the air generated by the fan blade 22 will not be too dispersed within the air guide ring 4. This prevents excessive collisions between the air generated by the fan blade 22 and the air guide ring 4, the housing 1, and the air outlet grille 3, resulting in less resistance and less airflow loss to the air generated by the fan 2.

[0154] When the ratio of the fifth dimension H5 to the first diameter R2 is less than 1.02, the assembly requirements of the fan blade 22 cannot be met, and the fan blade 22 cannot be installed inside the air guide ring 4.

[0155] When the ratio of the fifth dimension H5 to the first diameter R2 is greater than 1.1, the diameter of the largest circle formed by the rotation of the fan blade 22 is smaller than the minimum radial dimension of the air guide ring 4. The difference in size between the two causes the air generated by the fan blade 22 to be too dispersed in the air guide ring 4, resulting in excessive collisions between the air generated by the fan blade 22 and the air guide ring 4, the housing 1, and the air outlet grille 3. This increases the resistance to the air generated by the fan 2 and increases the air volume loss.

[0156] In some embodiments, such as Figure 21 As shown, the air guide ring 4 has a first part 41 and a second part 42 connected together. The first part 41 is connected to the housing 1, and the second part 42 is located on the side of the first part 41 away from the housing 1. The radial dimension of the first part 41 gradually decreases along the direction from the first part 41 to the second part 42.

[0157] The first part 41 of the air guide ring 4 guides the air blown out by the fan 2, allowing the air to blow along the inner circumference of the first part 41 towards the air outlet grille 3, reducing the collision between the air and the air guide ring 4, further reducing the resistance to the air and increasing the air volume of the outdoor unit of the air conditioner.

[0158] In some embodiments, the axial dimension of the first portion 41 in the ventilation hole 12 (e.g.) Figure 21 When the dimension M shown is greater than 0 and less than or equal to 20mm, the first part 41 allows the air blown by the fan 2 to be blown along the inner circumference of the first part 41 towards the air outlet grille 3, reducing the collision between the wind and the air guide ring 4, further reducing the resistance to the wind, and increasing the air volume of the outdoor unit of the air conditioner; and it will not cause the air blown by the fan 2 to be too dispersed after being guided by the first part 41, and will not cause the air volume blown towards the air outlet grille 3 near the annular frame 31 to increase, thereby not increasing the resistance of the air outlet grille 3 to the wind, and thus not increasing the loss of air volume.

[0159] The first part 41 has the following axial dimensions in the ventilation hole 12 (e.g.) Figure 21When the dimension M shown is greater than 20mm, the first part 41 will cause the air blown by the fan 2 to be too dispersed after being guided by the first part 41, resulting in an increase in the amount of air blown towards the air outlet grille 3 near the annular frame 31, which increases the resistance of the air outlet grille 3 to the wind, thereby increasing the air volume loss.

[0160] In some embodiments, such as Figure 21 As shown, the first part 41 of the air guide ring 4 forms a circle at the ventilation hole 12, and the angle between the normal of the inner circumference of the first part 41 and the axis of the ventilation hole 12 (as shown) Figure 21 The angle γ shown is greater than or equal to 75° and less than or equal to 90°. For example, the angle γ between the normal of the inner circumferential surface of the first part 41 and the axis of the ventilation hole 12 can be 75°, 80°, 85°, 90°, etc.

[0161] The first part 41 allows the air blown by the fan 2 to be directed along the inner circumference of the first part 41 towards the air outlet grille 3, reducing the collision between the air and the air guide ring 4, further reducing the resistance to the airflow, and increasing the air volume of the outdoor unit of the air conditioner. It also prevents the air blown by the fan 2 from becoming too dispersed after being guided by the first part 41, thus preventing an increase in the airflow near the annular frame 31 of the air outlet grille 3, and preventing an increase in the resistance of the air outlet grille 3 to the wind, thereby preventing any increase in airflow loss.

[0162] When the angle γ between the normal of the inner circumferential surface of the first part 41 and the axis of the ventilation hole 12 is less than 75°, the first part 41 will cause the air blown out by the fan 2 to be too dispersed after being guided by the first part 41, resulting in an increase in the air volume blown towards the air outlet grille 3 near the annular frame 31, which increases the resistance of the air outlet grille 3 to the wind, thereby increasing the air volume loss.

[0163] When the angle γ between the normal of the inner circumferential surface of the first part 41 and the axis of the ventilation hole 12 is 90°, the inner circumferential surface of the first part 41 will extend away from the accommodating cavity 11 along the axis of the ventilation hole 12. The inner circumferential surface of the first part 41 loses its function of guiding wind diffusion. The wind will blow onto the air guide ring 4 and collide with the air guide ring 4, causing the wind to be resisted by the air guide ring 4, thereby increasing the loss of air volume of the outdoor unit of the air conditioner and reducing the air volume.

[0164] When the angle γ between the normal of the inner circumferential surface of the first part 41 and the axis of the ventilation hole 12 is greater than 90°, the radial dimension of the first part 41 gradually increases in the direction from the first part 41 to the second part 42. The inner circumferential surface of the first part 41 causes the air blown by the fan 2 to concentrate towards the central axis of the ventilation hole 12, and the inner circumferential surface of the first part 41 obstructs the air blown by the fan 2. The air guide ring 4 increases the resistance to the air, increases the air volume loss, and reduces the air volume.

[0165] In some embodiments, the minimum radial dimension of the second part 42 is the minimum radial dimension of the air guide ring 4.

[0166] In some embodiments, such as Figure 21 As shown, the housing 1 includes a panel 13, which includes a first plate 131, a second plate 132 and a third plate 133 connected in sequence along the radial direction of the ventilation hole 12. The first plate 131 surrounds the second plate 132, the second plate 132 surrounds the third plate 133, and the third plate 133 is located on the side of the first plate 131 facing the receiving cavity 11. The ventilation hole 12 is opened on the third plate 133.

[0167] The third plate 133 is located on the side of the first plate 131 facing the receiving cavity 11, so that when the air outlet grille 3 is installed at the ventilation hole 12, the axial dimension of the outdoor unit of the air conditioner in the ventilation hole 12 is smaller than the sum of the axial dimensions of the annular frame 31 and the casing 1 in the ventilation hole 12, which meets the requirements of the miniaturization design of the outdoor unit of the air conditioner.

[0168] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0169] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

[0170] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioner outdoor unit characterized by comprising: The application relates to a casing, a fan and an air outlet grille. The casing has an accommodating cavity formed in the inside of the casing, and a ventilation hole is formed in the side wall of the casing. The fan is located in the accommodating cavity, and the ventilation hole is located at the air outlet side of the fan. The air outlet grille comprises: a ring-shaped frame arranged at the ventilation hole and fixed to the casing; a plurality of support ribs arranged at intervals along the circumference of the ring-shaped frame, with the first end of the support rib connected to the ring-shaped frame and the second end of the support rib located on the inner side of the ring-shaped frame; a plurality of circumferential ribs, each located on the inner side of the ring-shaped frame and arranged at intervals, with the circumferential rib and at least part of the support rib intersecting and connected, so that the plurality of support ribs and the plurality of circumferential ribs form a grille net after being connected; the size of the circumferential rib in the axial direction of the ring-shaped frame is a first size, the size of the support rib in the axial direction of the ring-shaped frame is a second size, the first size is greater than or equal to 6 mm, and the ratio of the first size and the second size to the minimum size of the ring-shaped frame in the radial direction of the ring-shaped frame is greater than or equal to 0.011 and less than or equal to 0.014; the ring-shaped frame is a circular ring, and the circumferential rib extends along the circumference of the ring-shaped frame; in the plurality of support ribs, part of the support ribs are first ribs, and the other part of the support ribs are second ribs, the first rib extends in the radial direction of the ring-shaped frame and is connected to the plurality of circumferential ribs; the second rib extends in the radial direction of the ring-shaped frame, and one second rib is located between two adjacent first ribs, the first end of the first rib and the first end of the second rib are connected to the ring-shaped frame, the distance from the center of the ring-shaped frame to the end face of the second end of the second rib is a first distance, the first distance is greater than the distance from the center of the ring-shaped frame to the end face of the second end of the first rib, and the ratio of the first distance to the radius of the ring-shaped frame is greater than or equal to 0.55 and less than or equal to 0.

7.

2. The air conditioner outdoor unit according to claim 1, characterized by The support rib extends along the inner side wall of the ring-shaped frame away from the outer side wall of the ring-shaped frame, and the included angle between the extension directions of two adjacent support ribs is greater than or equal to 7 degrees and less than or equal to 11 degrees.

3. The air conditioner outdoor unit according to claim 1, characterized by The radial distance between any two adjacent circumferential ribs is the same as the radial distance between the outermost circumferential rib of the plurality of circumferential ribs and the ring-shaped frame. The outermost circumferential rib of the plurality of circumferential ribs is connected to the plurality of support ribs, and for the outermost circumferential rib, the part located between two adjacent support ribs is a first arc segment, and the ratio of the arc length of the first arc segment to the radius of the ring-shaped frame is greater than or equal to 0.15 and less than or equal to 0.

2. And / or, among the plurality of the circumferential ribs between the second end of the second rib and the center of the annular rim, the outermost circumferential rib is located between the two adjacent first ribs, and the circumferential rib is a second arc segment, the ratio of the arc length of the second arc segment to the radius of the annular rim is greater than or equal to 0.15 and less than or equal to 0.

2.

4. The air conditioner outdoor unit according to claim 1 or 3, wherein In the case where the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.28 and less than 0.44, the radial dimension of at least part of the circumferential rib gradually decreases in the direction away from the fan; In the case where the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.44 and less than 0.78, the radial dimension of the circumferential rib is constant in the direction away from the fan; In the case where the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.78, the radial dimension of at least part of the axial rib gradually increases in the direction away from the fan.

5. The air conditioner outdoor unit according to claim 4, characterized in that, The projection of the axis of the circumferential rib on the inner wall surface of the circumferential rib is a first straight line segment; In the case where the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.28 and less than 0.44, the angle C between the extension line of the first straight line segment and the axis of the circumferential rib is 75-160*(R / R1), wherein R is the radius of the circumferential rib and R1 is the first distance; In the case where the ratio of the radius of the circumferential rib to the first distance is greater than or equal to 0.78, the angle C between the extension line of the first straight line segment and the axis of the circumferential rib is 50-64*(R / R1).

6. The air conditioner outdoor unit according to any one of claims 2-3, characterized by, The side of the adjacent two support ribs close to each other is a wind guide surface; Wherein, the wind guide surface is perpendicular to the end surface of the annular rim; Or, the wind guide surface includes a first side and a second side, in the axial direction of the annular rim, the second side is located on the side of the first side away from the fan, and in the rotation direction of the fan, the second side is located on one side of the first side.

7. The air conditioner outdoor unit according to any one of claims 1-3, characterized by, A plurality of through holes are arranged on the outer side wall of the annular rim.

8. The air conditioner outdoor unit according to claim 7, characterized by The ratio of the maximum dimension of the through hole in the axial direction of the annular rim to the radius of the annular rim is greater than or equal to 0.023 and less than or equal to 0.027, and the ratio of the maximum dimension of the through hole in the circumferential direction of the annular rim to the radius of the annular rim is greater than or equal to 0.09 and less than or equal to 0.

1.

9. The air conditioner outdoor unit according to any one of claims 1-3, characterized by, The second dimension is smaller than the first dimension, and the end of the support rib away from the fan is located on the side of the end of the circumferential rib away from the fan close to the fan, and the end of the support rib close to the fan is located on the side of the end of the circumferential rib close to the fan away from the fan.

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