Air conditioner outdoor unit

Abstract

This invention discloses an outdoor unit for an air conditioner, relating to the field of air conditioning technology, and aims to solve the problem of poor air guiding effect of the air guide ring in an outdoor unit for an air conditioner. The outdoor unit includes a casing, a fan, and an air guide ring. The casing has a receiving cavity, and the side wall of the casing has ventilation holes. The fan and the air guide ring are both located within the receiving cavity, and the ventilation holes are located on the air outlet side of the fan. The air guide ring is arranged circumferentially along the ventilation holes, and at least a portion of the fan is located within the air guide ring. The air guide ring includes a first air guide ring, a second air guide ring, and a third air guide ring. The first air guide ring is connected to the side wall of the casing. The second air guide ring is connected to the end of the first air guide ring away from the ventilation holes, and the radial dimension of the second air guide ring gradually increases in the direction away from the ventilation holes. The third air guide ring is connected to the end of the second air guide ring away from the first air guide ring, and the third air guide ring is located on the outer periphery of the second air guide ring. The radial dimension of the third air guide ring gradually increases in the direction closer to the ventilation holes. This outdoor unit for air conditioner 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 typically includes a casing and a fan and air guide ring installed inside the casing. When the fan operates, the air inside the casing of the outdoor unit flows towards the ventilation holes. At this time, the air guide ring guides the air to the ventilation holes and then discharges the air to the outside of the casing, thereby cooling and dissipating the high-temperature and high-pressure gas discharged from the indoor unit.

[0003] In current wind deflectors, when the air blown by the fan enters the air inlet of the wind deflector, some of the air flows to the outside of the wind deflector and collides with the inner wall of the casing to form a vortex. The vortex impacts the air entering the inside of the wind deflector, thus creating resistance to that part of the air. Consequently, the air volume near the inner wall of the wind deflector is relatively small, resulting in a smaller effective air guiding area inside the wind deflector and poor air guiding effect. Summary of the Invention

[0004] The embodiments of the present invention provide an outdoor air conditioner unit that solves the problem of poor air guiding effect of the air guide ring in the prior art.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0006] An outdoor unit for an air conditioner includes a casing, a fan, and an air guide ring. A receiving cavity is formed within the casing, and a ventilation hole communicating with the outside is located on the side wall of the casing. The fan is disposed within the receiving cavity, and the ventilation hole is located on the air outlet side of the fan. The air guide ring is located within the receiving cavity and is arranged circumferentially along the ventilation hole. At least a portion of the fan is located within the air guide ring. The air guide ring includes a first air guide ring, a second air guide ring, and a third air guide ring. The first air guide ring is connected to the side wall of the casing. The second air guide ring is connected to the end of the first air guide ring furthest from the ventilation hole, and the radial dimension of the second air guide ring gradually increases in the direction furthest from the ventilation hole. The third air guide ring is connected to the end of the second air guide ring furthest from the first air guide ring, and the third air guide ring is located on the outer periphery of the second air guide ring, and the radial dimension of the third air guide ring gradually increases in the direction closer to the ventilation hole.

[0007] The outdoor unit of the air conditioner provided in this application has a fan that drives the air in the housing cavity to flow sequentially through the air guide ring and the ventilation hole before being discharged to the outside of the unit casing. The first air guide ring is connected to the side wall of the unit casing, and the second air guide ring is connected to the end of the first air guide ring away from the ventilation hole. The radial dimension of the second air guide ring gradually increases in the direction away from the ventilation hole. When the air flows in the air guide ring, most of the air is first gathered into the second air guide ring under the guiding effect of the second air guide ring, then flows through the second air guide ring and enters the first air guide ring, and finally flows through the first air guide ring and the ventilation hole to be discharged to the outside of the unit casing.

[0008] Furthermore, as air enters the second air guide ring, some air flows from the edge of the air inlet end of the second air guide ring to the outside of the second air guide ring. By setting a third air guide ring on the outside of the second air guide ring, the third air guide ring is connected to the end of the second air guide ring away from the first air guide ring. The radial dimension of the third air guide ring gradually increases along the direction close to the ventilation hole. The air flowing to the outside of the second air guide ring will be blocked by the third air guide ring, so that some of the air changes direction and enters the second air guide ring, while the rest will flow along the outer wall of the third air guide ring towards the air inlet end away from the second air guide ring to the outside of the second air guide ring, and finally collide with the side wall of the receiving cavity.

[0009] Under the guiding effect of the outer wall of the third guide ring, the air flowing to the outside of the second guide ring will move away from the air inlet of the second guide ring. Therefore, the vortex formed after the collision of this part of the air with the inner wall of the cavity will also move away from the air inlet of the second guide ring. This can reduce the resistance of the vortex formed by the air flowing to the outside of the second guide ring to the air inlet of the second guide ring, thereby improving the air guiding effect of the second guide ring and thus improving the air guiding effect of the entire guide ring.

[0010] In some embodiments, the intersection of the inner wall surface of the second air guide ring and the first cross section of the air guide ring is a first arc, and the intersection of the outer wall surface of the third air guide ring and the first cross section is a second arc. The first cross section coincides with the plane containing the axis of the first air guide ring. The endpoint of the first arc away from the ventilation hole and the endpoint of the second arc away from the ventilation hole coincide, and the first arc and the second arc are tangent. This makes the connection between the second air guide ring and the third air guide ring relatively smooth, thereby reducing the resistance to wind at that point.

[0011] In some embodiments, the center point of the first arc is the same as the center point of the second arc; this facilitates the processing of the second guide ring and the third guide ring as a single integrated structure.

[0012] In some embodiments, the angle between the normal at the endpoint of the first arc near the ventilation hole and the normal at the endpoint of the second arc near the ventilation hole is greater than or equal to 160° and less than or equal to 180°; within this range, the angle between the normal at the endpoint of the first arc near the ventilation hole and the normal at the endpoint of the second arc near the ventilation hole can reduce the vortex formed by the wind flowing to the outside of the second air guide ring at the air inlet end of the second air guide ring, thereby minimizing the impact on the air intake volume of the air guide ring.

[0013] In some embodiments, the axial dimension of the housing in the first air guide ring is a first dimension; the first air guide ring includes an annular segment, and a second air guide ring is connected to the end of the annular segment away from the ventilation hole. The intersection of the inner wall surface of the annular segment and the first cross-section is a first straight line segment. The endpoint of the first straight line segment away from the ventilation hole coincides with the endpoint of the first arc line near the ventilation hole, and the first arc line is tangent to the first straight line segment. The radial dimension of the inner wall surface of the annular segment is a second dimension. When the ratio of the first dimension to the second dimension is greater than 1.7, both the first arc line and the second arc line are circular arcs. When the ratio of the first dimension to the second dimension is less than or equal to 1.7, both the first arc line and the second arc line are elliptical arcs. By reasonably adjusting the shapes of the second air guide ring and the third air guide ring, the integrity of the air guide ring can be ensured, and interference between the air guide ring and other components can be avoided.

[0014] In some embodiments, when the ratio of the first dimension to the second dimension is greater than 1.7, the ratio of the radius of the first arc to the second dimension, and the ratio of the radius of the second arc to the second dimension are both greater than or equal to 0.02 and less than or equal to 0.15; the radii of the first arc and the radii of the second arc satisfy this requirement, which enables the second and third air guide rings to have a better air guiding effect.

[0015] In some embodiments, when the ratio of the first dimension to the second dimension is greater than 1.7 and less than or equal to 2, the ratio of the radius of the first arc to the second dimension and the ratio of the radius of the second arc to the second dimension are both greater than or equal to 0.02 and less than or equal to 0.06; when the ratio of the first dimension to the second dimension is greater than 2, the ratio of the radius of the first arc to the second dimension and the ratio of the radius of the second arc to the second dimension are both greater than 0.06 and less than or equal to 0.15; by reasonably adjusting the radius of the first arc and the radius of the second arc according to the spatial changes of the accommodating cavity, interference between the air guide ring and other components can be avoided, and the air guiding effect of the second air guide ring and the third air guide ring can be guaranteed.

[0016] In some embodiments, when the ratio of the first dimension to the second dimension is less than or equal to 1.7, the major axis of the first arc coincides with the major axis of the second arc, and the minor axis of the first arc coincides with the minor axis of the second arc; the ratio of the major axis of the first arc to the second dimension is greater than or equal to 0.02 and less than or equal to 0.06, and the ratio of the minor axis of the first arc to the major axis of the first arc is greater than or equal to 0.5 and less than or equal to 0.8; when the major and minor axes of the first arc, as well as the major and minor axes of the second arc, satisfy the above ranges, the integrity of the air guide ring can be guaranteed, and interference between the air guide ring and other components can be avoided.

[0017] In some embodiments, the ratio of the minor axis to the major axis of the first arc is positively correlated with the first dimension. This allows the major and minor axes of the first arc, as well as the major and minor axes of the second arc, to be relatively large while avoiding interference between the air guide ring and other components, thereby maximizing the air guiding effect of the second and third air guide rings.

[0018] In some embodiments, the first air guide ring further includes a gradient ring segment connected to the ventilation hole and connected to the end of the circular ring segment near the ventilation hole. The radial dimension of the gradient ring segment gradually increases along the direction near the ventilation hole. The gradient ring segment enables the air of the first air guide ring to be evenly distributed in the ventilation hole, so that the air in the air guide ring can be quickly discharged. 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 a schematic diagram of the exploded structure of the outdoor unit of the air conditioner in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the air guide ring in the embodiments of this application;

[0022] Figure 4 This is a cross-sectional view of the air guide ring in an embodiment of this application;

[0023] Figure 5 for Figure 4 One of the enlarged schematic diagrams of the structure at point A in the middle;

[0024] Figure 6 for Figure 4 Second enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 7 for Figure 4 The third enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 8 for Figure 4 Fourth enlarged schematic diagram of the structure at point A in the middle;

[0027] Figure 9 This is a schematic diagram illustrating the simulated airflow effect within the air guide ring in the embodiments of this application when the air guide ring is not improved.

[0028] Figure 10 This is a schematic diagram illustrating the simulated airflow effect within the improved air guide ring in this embodiment of the application.

[0029] Figure 11 This is a schematic diagram of the wind field effect of the fan when the air guide ring is not improved in the embodiments of this application;

[0030] Figure 12 This is a schematic diagram of the wind field effect of the fan after the improvement of the air guide ring in the embodiments of this application;

[0031] Figure 13 This is a simulation diagram of the work capacity of the fan when the air guide ring is not improved in the embodiments of this application.

[0032] Figure 14 This is a simulation diagram of the work capacity of the fan after the improvement of the air guide ring in the embodiments of this application;

[0033] Figure 15 This is a schematic diagram of the simulation effect of the vortex distribution near the fan when the air guide ring is not improved in the embodiments of this application;

[0034] Figure 16 This is a simulation diagram of the vortex distribution near the fan after the improvement of the air guide ring in the embodiments of this application;

[0035] Figure 17 This is a schematic diagram showing the relationship between the overall air volume and power of the outdoor unit of the air conditioner before and after the improvement of the air guide ring in the embodiments of this application;

[0036] Figure 18 This is a schematic diagram showing the relationship between the overall air volume and noise of the outdoor unit of the air conditioner before and after the improvement of the air guide ring in the embodiments of this application;

[0037] Figure 19 This is an exploded structural diagram of the first and second parts of the air guide ring in an embodiment of this application.

[0038] Figure 20 This is a schematic diagram of the welding structure of the first and second parts of the air guide ring in the embodiments of this application.

[0039] Figure label:

[0040] 1-Housing housing; 11-Receiving cavity; 12-Ventilation hole;

[0041] 2-Fan; 21-Motor; 22-Fan blade;

[0042] 3-Air guide ring; 31-First air guide ring; 311-Circular ring segment; 3111-First straight segment; 312-Gradual ring segment; 3121-Third arc; 32-Second air guide ring; 321-First arc; 33-Third air guide ring; 331-Second arc; 34-Groove; 35-First part; 36-Second part; 37-Weld point;

[0043] 4-First section;

[0044] H - First dimension; D - Second dimension; R1 - Radius of the first arc; R2 - Radius of the second arc; F1 - Major axis of the first arc; F2 - Minor axis of the first arc; α - First angle. Detailed Implementation

[0045] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 outputs 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 outputs 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.

[0052] During operation, the outdoor unit directs the air blown out by the fan through the air guide ring to the ventilation holes on the side wall of the outdoor unit casing, and then discharges the air into the outdoor air after passing through the ventilation holes and the air outlet grille.

[0053] When the air guide ring directs the airflow from the fan, it splits the airflow into two parts. One part enters the inner side of the air guide ring, and the other part flows to the outer side of the air guide ring. The airflow to the outer side of the air guide ring collides with the inner wall of the outdoor unit casing of the air conditioner, forming a large vortex. This vortex will create resistance to the airflow at the inlet of the air guide ring, resulting in a smaller airflow near the side wall of the air guide ring. This reduces the effective air intake area of ​​the air guide ring and leads to a poor air guiding effect.

[0054] Based on this, this application provides an outdoor unit for an air conditioner, such as... Figure 1As shown, the outdoor unit of the air conditioner includes a housing 1, a fan 2, and an air guide ring 3. The housing 1 has a cavity 11, and the side wall of the housing 1 has a ventilation hole 12 that connects the cavity 11 to the outside. The fan 2 is located in the cavity 11, and the ventilation hole 12 is located on the air outlet side of the fan 2. The air guide ring 3 is located in the cavity 11 and is arranged around the ventilation hole 12. At least a part of the fan 2 is located in the air guide ring 3.

[0055] Among them, such as Figure 2 As shown, the fan 2 includes a motor 21 and a fan blade 22. The fan blade 22 is fixed on the output shaft of the motor 21, and at least a portion of the fan blade 22 is located inside the air guide ring 3. The motor 21 drives the fan blade 22 to rotate, thereby driving the air flow in the receiving cavity 11. During the flow, the air will flow through the air guide ring 3 and the ventilation hole 12 in sequence and then be discharged to the outside of the casing 1. The air guide ring 3 is used to guide the air to the ventilation hole 12 to avoid the air being too dispersed in the receiving cavity 11, which would affect the flow of air to the ventilation hole 12.

[0056] Among them, such as Figure 3 and Figure 4 As shown, the air guide ring 3 includes a first air guide ring 31, a second air guide ring 32, and a third air guide ring 33. The first air guide ring 31 is connected to the side wall of the housing 1. Specifically, the first air guide ring 31 is connected to the side wall with the ventilation hole 12, and the first air guide ring 31 communicates with the ventilation hole 12. The second air guide ring 32 is coaxially arranged with the first air guide ring 31 and is connected to the end of the first air guide ring 31 away from the ventilation hole 12. The radial dimension of the second air guide ring 32 (e.g., ...) is... Figure 5 The dimension L shown gradually increases in the direction away from the ventilation hole 12, that is, the radial dimension of the air inlet end of the second air guide ring 32 (as shown in the figure). Figure 5 The dimension L1 shown is larger than the radial dimension of the air outlet (e.g., ...). Figure 5 The dimension D shown in the figure.

[0057] Therefore, most of the air generated by the operation of the fan 2 can be gathered by the second air guide ring 32 and enter the second air guide ring 32. After flowing through the second air guide ring 32, it enters the first air guide ring 31, and then flows through the first air guide ring 31 to the ventilation hole 12. Finally, it flows through the ventilation hole 12 and is discharged to the outside of the casing 1.

[0058] During this process, in order to ensure that the air flowing out of the first guide ring 31 is evenly distributed within the ventilation hole 12, such as Figure 4 and Figure 5As shown, the first air guide ring 31 includes a circular ring segment 311 and a gradient ring segment 312. The gradient ring segment 312 is coaxially arranged with the circular ring segment 311 and is connected to the ventilation hole 12. The circular ring segment 311 is located at the end of the gradient ring segment 312 away from the ventilation hole 12, and the gradient ring segment 312 is connected to the end of the circular ring segment 311 near the ventilation hole 12. The radial dimension of the gradient ring segment 312 (e.g., ...) is... Figure 5 The dimension M shown gradually increases along the direction close to the ventilation hole 12. That is, the radial dimension of the end of the tapered ring segment 312 away from the ventilation hole 12 (e.g., Figure 5 The dimension D shown is smaller than the radial dimension of the end of the gradient ring 312 near the ventilation hole 12 (e.g., Figure 5 The dimension M1 shown in the figure.

[0059] The second air guide ring 32 is coaxially arranged with the circular section 311 and connected to the end of the circular section 311 away from the ventilation hole 12. The air in the second air guide ring 32 will flow through the circular section 311 and then enter the gradient ring section 312. It will be evenly dispersed in the ventilation hole 12 through the diffusion of the gradient ring section 312, so that the air in the air guide ring 3 can quickly flow out to the outside of the housing 1 through the ventilation hole 12.

[0060] To ensure smoother airflow within the air guide ring 3, such as Figure 5 As shown, the radial dimension of the annular segment 311 can be the second dimension D, and the second dimension D can be kept unchanged. That is, the intersection of the inner wall surface of the annular segment 311 and the first section 4 is the first straight line segment 3111, where the first section 4 is a section that coincides with the plane containing the axis of the air guide ring 3.

[0061] Furthermore, the minimum radial dimension of the second guide ring 32 and the minimum radial dimension of the gradient ring segment 312 are both equal to the second dimension D.

[0062] During the process of the second guide ring 32 converging the air generated by the fan 2, some air will flow to the outside of the second guide ring 32. In order to reduce the amount of air flowing to the outside of the second guide ring 32, a third guide ring 33 is set on the outside of the second guide ring 32.

[0063] Specifically, such as Figure 4 and Figure 5 As shown, the third air guide ring 33 is coaxially arranged with the second air guide ring 32 and connected to the end of the second air guide ring 32 away from the first air guide ring 31. The third air guide ring 33 is located outside the second air guide ring 32, and the radial dimension of the third air guide ring 33 (as shown) Figure 5 The dimension N shown gradually increases along the direction close to the ventilation hole 12, that is, the radial dimension of the end of the third air guide ring 33 away from the ventilation hole 12 (e.g., Figure 5 The dimension L1 shown is smaller than the radial dimension of the end of the third air guide ring 33 near the ventilation hole 12 (e.g., Figure 5 The dimension N1 shown in the figure.

[0064] Therefore, the wind flowing to the outside of the second guide ring 32 will be blown to the outer wall of the third guide ring 33 and thus blocked by the third guide ring 33. After being blocked by the third guide ring 33, some of the wind will change direction and enter the second guide ring 32, while some will flow along the outer wall of the third guide ring 33 in a direction away from the air inlet of the second guide ring 32 to the outside of the second guide ring 32, and eventually collide with the side wall of the receiving cavity 11.

[0065] Under the guiding effect of the outer wall of the third guide ring 33, the wind flowing to the outside of the second guide ring 32 will move away from the air inlet of the second guide ring 32. Therefore, the vortex formed after the wind collides with the inner wall of the receiving cavity 11 will also move away from the air inlet of the second guide ring 32. This can reduce the resistance of the vortex formed by the wind flowing to the outside of the second guide ring 32 to the wind at the air inlet of the second guide ring 32. This can make the wind entering the inner side of the second guide ring 32 have a larger air volume near the inner wall of the second guide ring 32, thereby increasing the effective air guiding area of ​​the inner side of the second guide ring 32, improving the air guiding effect of the second guide ring 32, and thus improving the air guiding effect of the entire guide ring 3.

[0066] Furthermore, after the third guide ring 33 and the second guide ring 32 are connected, a groove 34 is formed between the second guide ring 32 and the third guide ring 33. The air flowing to the outside of the second guide ring 32 is guided by the third guide ring 33 and collides with the side wall of the receiving cavity 11. During the return flow, it will be blocked by the groove 34, so that most of the air flowing to the outside of the second guide ring 32 flows between the groove 34 and the side wall of the receiving cavity 11. This reduces the amount of air flowing back to the air inlet of the second guide ring 32, thereby further reducing the impact of this part of the air on the air entering the second guide ring 32, further increasing the effective air guiding area on the inner side of the second guide ring 32, improving the air guiding effect of the second guide ring 32, and thus further improving the air guiding effect of the entire guide ring 3.

[0067] It should be noted that the radial dimension of the second air guide ring 32 can decrease uniformly in the direction away from the ventilation hole 12, or it can decrease non-uniformly in the direction away from the ventilation hole 12; the radial dimension of the third air guide ring 33 can decrease uniformly in the direction close to the ventilation hole 12, or it can decrease non-uniformly in the direction close to the ventilation hole 12.

[0068] For example, in some embodiments, such as Figure 6As shown, the radial dimension of the second air guide ring 32 decreases uniformly in the direction away from the ventilation hole 12, and the radial dimension of the third air guide ring 33 decreases uniformly in the direction close to the ventilation hole 12. At this time, the intersection line of the inner wall surface of the second air guide ring 32 and the first section 4 and the intersection line of the inner wall surface of the third air guide ring 33 and the first section 4 are both straight line segments.

[0069] In other embodiments, such as Figure 7 As shown, the radial dimension of the second air guide ring 32 decreases uniformly in the direction away from the ventilation hole 12, and the radial dimension of the third air guide ring 33 decreases non-uniformly in the direction close to the ventilation hole 12. At this time, the intersection of the inner wall surface of the second air guide ring 32 and the first section 4 is a straight line segment, and the intersection of the inner wall surface of the third air guide ring 33 and the first section 4 is an arc.

[0070] In some other embodiments, such as Figure 8 As shown, the radial dimension of the second air guide ring 32 decreases non-uniformly in the direction away from the ventilation hole 12, and the radial dimension of the third air guide ring 33 decreases non-uniformly in the direction close to the ventilation hole 12. At this time, the intersection line of the inner wall surface of the second air guide ring 32 and the first section 4 and the intersection line of the inner wall surface of the third air guide ring 33 and the first section 4 are both arcs.

[0071] Here, we will take the intersection of the inner wall of the second guide ring 32 and the first section 4 and the intersection of the inner wall of the third guide ring 33 and the first section 4 as examples, both of which are arcs.

[0072] Specifically, the intersection of the inner wall of the second guide ring 32 and the first section 4 of the guide ring 3 can be the first arc 321, and the intersection of the outer wall of the third guide ring 33 and the first section 4 can be the second arc 331.

[0073] To ensure smoother airflow at the junction of the second guide ring 32 and the third guide ring 33, such as Figure 8 As shown, the endpoints of the first arc 321 away from the ventilation hole 12 and the second arc 331 away from the ventilation hole 12 can be made to coincide, and the first arc 321 and the second arc 331 are tangent to each other.

[0074] When the air blown out by the fan 2 reaches the air inlet of the second air guide ring 32, it will split into two parts. One part flows along the inner wall of the second air guide ring 32 into the second air guide ring 32, and the other part flows along the outer wall of the third air guide ring 33 to the side wall of the receiving cavity 11.

[0075] Since the first arc 321 and the second arc 331 are tangent at the end furthest from the ventilation hole 12, the connection between the second guide ring 32 and the third guide ring 33 can be relatively smooth. This allows the two parts of the airflow after splitting to experience less resistance at the connection between the second guide ring 32 and the third guide ring 33. As a result, the wall airflow can form a vortex at the connection between the second guide ring 32 and the third guide ring 33, thus affecting the airflow of the second guide ring 32.

[0076] Furthermore, the second air guide ring 32 and the third air guide ring 33 are usually an integral structure, processed by sheet metal one-time forming process. In order to facilitate the processing of the second air guide ring 32 and the third air guide ring 33, the center point of the first arc 321 and the center point of the second arc 331 can be the same, that is, after the first air guide ring 31 and the second air guide ring 32 are connected together, they are a segment of arc on the same circle or a segment of elliptical arc on the same ellipse.

[0077] Based on this, the angle formed by the normal at the endpoint of the first arc 321 near the ventilation hole 12 and the normal at the endpoint of the second arc 331 near the ventilation hole 12 can be (e.g., Figure 8 The angle α shown is greater than or equal to 160° and less than or equal to 180°. For ease of description, the angle formed by the normal at the endpoint of the first arc 321 near the ventilation hole 12 and the normal at the endpoint of the second arc 331 near the ventilation hole 12 can be named the first angle α.

[0078] For example, the first angle α can be 160°, 165°, 170°, 175°, 180°, etc.

[0079] When the first angle α is within the above range, the third guide ring 33 can better guide the air flowing to the outside of the second guide ring 32, so that the vortex formed by the air flowing to the outside of the second guide ring 32 at the air inlet end of the second guide ring 32 is smaller, thereby minimizing the impact on the air intake of the guide ring 3.

[0080] Specifically, such as Figure 9 As shown, when the air guide ring 3 is not improved as described above, the air flowing to the outside of the second air guide ring 32 flows between the outer wall of the air guide ring 3 and the side wall of the receiving cavity 11, and some of the air flows back to the air inlet end of the air guide ring 3 and enters the inner side of the air guide ring 3. This causes the air to flow between the outer wall of the air guide ring 3 and the side wall of the receiving cavity 11, at the air inlet end of the air guide ring 3, and at the inner side of the air guide ring 3 near the inner wall (e.g., Figure 9 The area X1 shown in the dashed box forms a vortex. This vortex is relatively large and has a significant impact on the air intake within the air guide ring 3. In particular, it reduces the airflow near the inner wall of the air guide ring 3, meaning that the effective air intake area of ​​the air guide ring 3 is small.

[0081] like Figure 10 As shown, after the above-mentioned improvement to the air guide ring 3, the air flowing to the outside of the second air guide ring 32 mainly flows between the outer wall of the air guide ring 3 and the side wall of the receiving cavity 11. The vortex formed by this part of the air also mainly flows between the outer wall of the air guide ring 3 and the side wall of the receiving cavity 11 (e.g., Figure 10 In the area X2 shown in the dashed box, only a small amount of air forms a vortex on the inner side of the air guide ring 3 near the inner wall surface of the air guide ring 3, and this vortex is close to the air outlet (e.g. Figure 10 As shown in the dashed box (area X3), it can be seen that after the improvement of the wind guide ring 3, the vortex formed by the wind flowing to the outside of the second wind guide ring 32 is significantly reduced, and the wind flow velocity within the wind guide ring 3 is also significantly increased (e.g., Figure 10 (The darker areas in the middle are enlarged), thus the air guiding effect of the improved air guide ring 3 is significantly improved.

[0082] After the above improvements are made to the air guide ring 3, the influence of the vortex formed by the wind flowing to the outside of the second air guide ring 32 on the air intake of the air guide ring 3 is reduced, and the air delivery distance of the fan 2 at the operating speed will also be significantly improved.

[0083] Specifically, such as Figure 11 As shown, when the air guide ring 3 is not improved as described above, the air blown by the fan 2 will have its delivery distance affected by the vortex. Figure 11 The distribution of wind fields clearly shows the air delivery distance of fan 2 at this time (e.g. Figure 11 The distance Y1 shown is relatively small.

[0084] like Figure 12 As shown, after the above improvements to the air guide ring 3, the vortex at the air inlet and the inner side of the air guide ring 3 is reduced, the influence of the vortex on the air inlet of the air guide ring 3 is reduced, and the resistance of the air blown out by the fan 2 is also reduced, thereby improving the air delivery distance of the fan 2. Figure 12 The distribution of wind fields clearly shows the air delivery distance of fan 2 at this time (e.g. Figure 12 The distance Y2 shown in the figure is significantly increased.

[0085] Furthermore, after the aforementioned improvements were made to the air guide ring 3, the overall performance of the fan 2 was also improved.

[0086] Specifically, such as Figure 13 As shown, when the air guide ring 3 is not improved as described above, the work capacity of the fan 2 is relatively low due to the influence of the vortex at the air inlet end and the inner side of the air guide ring 3 (e.g., Figure 13 (There are fewer darker areas on the middle fan blade 22).

[0087] like Figure 14As shown, after the above improvements to the air guide ring 3, the resistance to the air blown by the fan 2 is reduced because the vortex at the air inlet and the inner side of the air guide ring 3 is smaller, and the work capacity of the fan 2 is significantly increased (e.g., Figure 14 (The darker areas on the middle fan blade 22 have increased significantly), indicating that the performance of the fan 2 has also been improved through structural improvements to the air guide ring 3.

[0088] Furthermore, after the aforementioned improvements to the air guide ring 3, the noise generated by the air blown by the fan 2 will also be reduced. Specifically, the noise is mainly caused by the eddies formed during the airflow process, so the intensity of the noise can be reflected by the amount of eddies.

[0089] like Figure 15 As shown, when the air guide ring 3 is not improved as described above, there are many vortex distribution areas near the fan 2, such as... Figure 16 As shown, after the above improvements to the guide ring 3, the overall change in the vortex distribution in the area near the fan 2 is small, but the amount of vortex is reduced compared to when the guide ring 3 was not improved. Figure 16 Central region Z1 relative to Figure 15 The amount of eddy current in the middle region Z2 has decreased, and Figure 16 Central region Z3 relative to Figure 15 The amount of vortex in the central region Z4 has been reduced; it can be seen that the noise generated by the wind blown by the fan 2 has also been reduced by improving the structure of the wind guide ring 3.

[0090] After the above-mentioned improvements were made to the structure of the air guide ring 3, the power and noise of the outdoor unit of the air conditioner were measured and compared.

[0091] Specifically, such as Figure 17 As shown, under the same air volume, the total power of the outdoor unit of the air conditioner with the improved air guide ring 3 is lower than that of the outdoor unit of the air conditioner without the improved air guide ring 3. Furthermore, according to the measured data, under the same air volume, the total power of the outdoor unit of the air conditioner with the improved air guide ring 3 is reduced by an average of 20W compared to that of the outdoor unit of the air conditioner without the improved air guide ring 3.

[0092] like Figure 18 As shown, under the same air volume, the noise generated by the air conditioner outdoor unit after the improvement of the air guide ring 3 is lower than that generated by the air conditioner outdoor unit without the improvement of the air guide ring 3. Furthermore, according to the measured data, under the same air volume, the noise generated by the air conditioner outdoor unit after the improvement of the air guide ring 3 is reduced by about 1.2-1.5 dB compared with that generated by the air conditioner outdoor unit without the improvement of the air guide ring 3.

[0093] It should be noted that when the first angle α is less than 160°, the change in the air guiding effect of the air guide ring 3 is small, and the improvement on the overall performance of the outdoor unit of the air conditioner is also small; when the first angle α is greater than 180°, the processing technology of the air guide ring 3 cannot guarantee the yield and reliability of mass production of the air guide ring 3, and the improvement on the performance of the air guide ring 3 and the overall performance of the outdoor unit of the air conditioner is not obvious.

[0094] In some embodiments, in order to make the airflow into the air guide ring 3 smoother, the intersection of the inner wall surface of the annular segment 311 and the first section 4 can be named the first straight segment 3111. The endpoint of the first straight segment 3111 away from the ventilation hole 12 is made to coincide with the endpoint of the first arc 321 near the ventilation hole 12, and the first arc 321 is tangent to the first straight segment 3111. This makes the connection between the second air guide ring 32 and the annular segment 311 smoother, thereby reducing the resistance to wind at the connection between the second air guide ring 32 and the annular segment 311, and making the process of the air in the second air guide ring 32 entering the annular segment 311 smoother.

[0095] Furthermore, the intersection of the inner wall of the gradient ring segment 312 and the first section 4 can be made into a third arc 3121, with the end of the third arc 3121 away from the ventilation hole 12 coinciding with the end of the first straight segment 3111 near the ventilation hole 12, and the third arc 3121 being tangent to the first straight segment 3111. This makes the connection between the gradient ring segment 312 and the circular ring segment 311 smoother, thereby reducing the resistance to wind at the connection between the gradient ring segment 312 and the circular ring segment 311, thus making the process of wind entering the gradient ring segment 312 from the circular ring segment 311 smoother.

[0096] Based on this, since the air guide ring 3 needs to be installed in the housing cavity 11 of the housing 1 and work in conjunction with the fan 2 and the ventilation hole 12, the space of the housing cavity 11 will affect the arrangement of the components in the housing cavity 11. In order to avoid interference between the improved air guide ring 3 and other components, the shape of the second air guide ring 32 and the third air guide ring 33 of the air guide ring 3 can be further improved, that is, the radial dimension of the first arc 321 and the radial dimension of the second arc 331 can be further improved.

[0097] Specifically, such as Figure 2 As shown, the axial dimension of the housing 1 in the first air guide ring 31 is the first dimension H, as... Figure 5 As shown, the radial dimension of the annular segment 311 is the second dimension D. When the ratio of the first dimension H to the second dimension D is greater than 1.7, as... Figure 8 As shown, both the first arc 321 and the second arc 331 can be circular arcs.

[0098] Both the first arc 321 and the second arc 331 are circular arcs, which can make the distance between the outer wall surface of the second air guide ring 32 and the inner wall surface of the third air guide ring 33 in the radial direction of the second air guide ring 32 larger. This can more effectively guide the air blown out by the fan 2, so as to reduce the influence of the vortex formed by the wind on the air entering the second air guide ring 32.

[0099] The radius of the first arc 321 and the radius of the second arc 331 can be the same or different, and the center point (i.e., the center of the circle) of the first arc 321 and the center point (i.e., the center of the circle) of the second arc 331 can be the same or different. Here, we will take the example where the radius R1 of the first arc 321 and the radius R2 of the second arc 331 are the same, and the center point of the first arc 321 and the center point of the second arc 331 are the same.

[0100] In this case, the space of the housing 1's cavity 11 is relatively large, which facilitates the arrangement of various components within the cavity 11. When the air guide ring 3 interferes with other components, it is only necessary to adjust the radius R1 of the first arc 321 and the radius R2 of the second arc 331. Specifically, the ratio of the radius R1 of the first arc 321 to the second dimension D, and the ratio of the radius R2 of the second arc 331 to the second dimension D, can both be greater than or equal to 0.02 and less than or equal to 0.15.

[0101] With the second dimension D determined, based on the aforementioned ratio of the radius R1 of the first arc 321 to the second dimension D, and the aforementioned ratio of the radius R2 of the second arc 331 to the second dimension D, the maximum radius of the first arc 321 and the maximum radius of the second arc 331 can be determined without interference between the air guide ring 3 and other components. This avoids interference between the air guide ring 3 and other components and ensures better air guiding performance for the second air guide ring 32 and the third air guide ring 33.

[0102] For example, when the ratio of the first dimension H to the second dimension D is greater than 1.7 and less than or equal to 2, the ratio of the radius R1 of the first arc 321 to the second dimension D, and the ratio of the radius R2 of the second arc 331 to the second dimension D are both greater than or equal to 0.02 and less than or equal to 0.06.

[0103] In this case, the space of the housing cavity 11 is relatively small. If the radius R1 of the first arc 321 and the radius R2 of the second arc 331 are large, it will cause the air guide ring 3 to interfere with other structures. Therefore, the radius R1 of the first arc 321 and the radius R2 of the second arc 331 can be small, that is, the ratio of the radius R1 of the first arc 321 to the second dimension D and the ratio of the radius R2 of the second arc 331 to the second dimension D are taken in the range of 0.02-0.06.

[0104] When the ratio of the first dimension H to the second dimension D is greater than 2, the ratio of the radius R1 of the first arc 321 to the second dimension D, and the ratio of the radius R2 of the second arc 331 to the second dimension D are both greater than 0.06 and less than or equal to 0.15.

[0105] In this case, the space of the housing cavity 11 is relatively large, and the air guide ring 3 will not interfere with other components. At this time, the radius R1 of the first arc 321 and the radius R2 of the second arc 331 can be larger, that is, the ratio of the radius R1 of the first arc 321 to the second dimension D and the ratio of the radius R2 of the second arc 331 to the second dimension D are taken in the range of 0.06-0.15.

[0106] It should be noted that when the ratio of the radius R1 of the first arc 321 to the second dimension D, and the ratio of the radius R2 of the second arc 331 to the second dimension D are both less than 0.02, the radii R1 of the first arc 321 and R2 of the second arc 331 are too small, which will result in poor air guiding effect of the second air guiding ring 32 and the third air guiding ring 33. When the ratio of the radius R1 of the first arc 321 to the second dimension D, and the ratio of the radius R2 of the second arc 331 to the second dimension D are both greater than 0.15, the improvement in air guiding effect of the first air guiding ring 31 and the second air guiding ring 32 is not significant, and it will increase material costs and cause the air guiding ring 3 to occupy more space.

[0107] When the ratio of the first dimension H to the second dimension D is less than or equal to 1.7, the axial dimension of the housing 1 in the first air guide ring 31 is small, resulting in a small space in the receiving cavity 11. If the first arc 321 and the second arc 331 are both circular arcs, the air guide ring 3 will interfere with other components. Furthermore, adjusting the radius R1 of the first arc 321 and the radius R2 of the second arc 331 cannot eliminate the interference between the air guide ring 3 and other components.

[0108] If the shapes of the first air guide ring 31 and the second air guide ring 32 are not improved, the parts of the air guide ring 3 that interfere with other components need to be cut off. This will greatly affect the performance of the air guide ring 3, resulting in a significant loss of airflow into the air guide ring 3.

[0109] Therefore, in this case, such as Figure 5 As shown, the first arc 321 and the second arc 331 can both be elliptical arcs, and the major axis F1 of the first arc 321 and the major axis of the second arc 331 can coincide, as can the minor axis F2 of the first arc 321 and the minor axis of the second arc 331. At this time, the center points of the first arc 321 and the second arc 331 are also the same, that is, the first arc 321 and the second arc 331 are two arcs connected together on the same ellipse.

[0110] Both the first arc 321 and the second arc 331 are elliptical arcs, which can make the minor axis of the elliptical arc set along the radial direction of the second air guide ring 32. This allows the distance between the outer wall surface of the second air guide ring 32 and the inner wall surface of the third air guide ring 33 in the radial direction of the second air guide ring 32 to be smaller, so as to avoid interference between the air guide ring 3 and other components and to ensure the integrity of the air guide ring 3. This allows for more effective guidance of the air blown out by the fan 2, thereby reducing the impact of the vortex formed by the wind on the air entering the second air guide ring 32.

[0111] For example, the ratio of the major axis F1 of the first arc 321 to the second dimension D can be greater than or equal to 0.02 and less than or equal to 0.06, and the ratio of the minor axis F2 of the first arc 321 to the major axis of the first arc 321 can be greater than or equal to 0.5 and less than or equal to 0.8.

[0112] Since the major axis F1 of the first arc 321 coincides with the major axis of the second arc 331, and the minor axis F2 of the first arc 321 also coincides with the minor axis of the second arc 331, the ratio of the major axis of the second arc 331 to the second dimension D is greater than or equal to 0.02 and less than or equal to 0.06, and the ratio of the minor axis of the second arc 331 to the major axis of the second arc 331 is greater than or equal to 0.5 and less than or equal to 0.8.

[0113] Based on this, in order to maximize the air guiding effect of the second air guiding ring 32 and the third air guiding ring 33, the ratio of the minor axis F2 of the first arc 321 to the major axis F1 of the first arc 321 can be positively correlated with the first dimension H. That is, as the first dimension H increases, the ratio of the minor axis F2 of the first arc 321 to the major axis F1 of the first arc 321 also increases.

[0114] The major axis F1 of the first arc 321, the major axis of the second arc 331, the minor axis F2 of the first arc 321, and the minor axis of the second arc 331 are all within the range mentioned above. This can prevent the air guide ring 3 from interfering with other components and ensure the integrity of the air guide ring 3, thereby improving the air guiding effect of the air guide ring 3.

[0115] After the shape of the air guide ring 3 was improved, the overall performance of the outdoor unit of the air conditioner was simulated and tested. The details are shown in Table 1 below.

[0116] Table 1:

[0117] Fan speed 2 720 720 air volume 4268.4 4453.8 torque 1.5883 1.75 static pressure efficiency 43％ 45％

[0118] As shown in Table 1, with the fan speed remaining constant, the total air volume of the outdoor unit of the air conditioner increased by 4.3%, and the efficiency of fan 2 increased from 43% to 45%, indicating that the working capacity of fan 2 has been improved.

[0119] In some embodiments, since the current air guide ring 3 is a one-piece structure, it is processed using a sheet metal one-time forming process. After the above-mentioned improvements are made to the air guide ring 3, the current processing technology will utilize a radius one-time forming process to process the air guide ring 3.

[0120] Based on this, the improved air guide ring 3 of this application can be decomposed into two parts for processing, and then the two processed parts can be welded together.

[0121] Specifically, such as Figure 19 As shown, the air guide ring 3 can be divided into two parts along the radial direction of its annular segment 311 from the middle position. That is, the annular segment 311 is divided into a first annular segment 3112 and a second annular segment 3113. The first annular segment 3112 is connected to the second air guide ring 32 and the third air guide ring 33 in sequence and is an integral structure. This part is the first part 35 of the air guide ring 3. The second annular segment 3113 is connected to the gradient annular segment 312 and is an integral structure. This part is the second part 36 of the air guide ring 3.

[0122] Then, the first part 35 of the air guide ring 3 is processed using a sheet metal one-time forming process, and the second part 36 of the air guide ring 3 is also processed using a sheet metal one-time forming process. Then, the processed first part 35 and second part 36 are installed on a tooling for splicing. Specifically, the end of the first annular segment 3112 of the first part 35 away from the second air guide ring 32 is connected to the end of the second annular segment 3113 of the second part 36 away from the gradient segment 312, and the first annular segment 3112 and the second annular segment 3113 are made coaxial. Finally, the connection position of the first annular segment 3112 and the second annular segment 3113 is welded together, thereby welding the first part 35 and the second part 36 together to form a complete air guide ring 3.

[0123] In some embodiments, the welding of the first annular segment 3112 and the second annular segment 3113 can be performed using spot welding, such as... Figure 20 As shown, the weld points 37 can be evenly distributed along the circumference of the first annular segment 3112. After the first annular segment 3112 and the second annular segment 3113 are welded, the gap between the first annular segment 3112 and the second annular segment 3113 can be covered by powder spraying to prevent the air from flowing out of the gap and causing abnormal noise when the air flows in the air guide ring 3.

[0124] Since the air guide ring 3 is mainly used to guide the air blown out by the fan 2 and is not subject to other forces, spot welding can be used to ensure the structural strength of the air guide ring 3.

[0125] In other embodiments, the welding of the first annular segment 3112 and the second annular segment 3113 can also be carried out by ultrasonic welding, where the mating portion of the first annular segment 3112 and the second annular segment 3113 is welded around the circumference of the first annular segment 3112.

[0126] 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.

[0127] 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.

[0128] 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 outdoor unit for an air conditioner, characterized in that, include: The housing has a cavity inside, and the side wall of the housing has ventilation holes that connect the cavity to the outside. A fan is disposed within the receiving cavity, and the ventilation hole is located on the air outlet side of the fan; An air guide ring is located within the receiving cavity and is arranged circumferentially along the ventilation holes. At least a portion of the fan is located within the air guide ring. The air guide ring includes a first air guide ring, a second air guide ring, and a third air guide ring. The intersection of the inner wall surface of the second air guide ring and a first cross-section of the air guide ring forms a first arc. The intersection of the outer wall surface of the third air guide ring and the first cross-section forms a second arc. The first cross-section coincides with the plane containing the axis of the first air guide ring. The center point of the first arc and the center point of the second arc are the same. The first air guide ring is connected to the side wall of the housing. The first air guide ring includes a circular segment, and the intersection of the inner wall surface of the circular segment and the first cross-section is a first straight line segment. The second air guide ring is connected to the end of the circular segment away from the ventilation hole, and the radial dimension of the second air guide ring gradually increases in the direction away from the ventilation hole. The third air guide ring is connected to the end of the second air guide ring away from the first air guide ring. The third air guide ring is located on the outer periphery of the second air guide ring, and the radial dimension of the third air guide ring gradually increases in the direction closer to the ventilation hole. The endpoint of the first arc away from the ventilation hole coincides with the endpoint of the second arc away from the ventilation hole, and the first arc and the second arc are tangent to each other. The angle between the normal at the end of the first arc near the ventilation hole and the normal at the end of the second arc near the ventilation hole is greater than or equal to 160° and less than or equal to 180°.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The dimension of the housing along the axial direction of the first air guide ring is the first dimension; The first air guide ring includes a circular segment, and the second air guide ring is connected to the end of the circular segment away from the ventilation hole. The intersection of the inner wall surface of the circular segment and the first cross section is a first straight line segment. The endpoint of the first straight line segment away from the ventilation hole coincides with the endpoint of the first arc line near the ventilation hole, and the first arc line is tangent to the first straight line segment. The radial dimension of the inner wall surface of the circular segment is a second dimension. When the ratio of the first dimension to the second dimension is greater than 1.7, both the first arc and the second arc are circular arcs; when the ratio of the first dimension to the second dimension is less than or equal to 1.7, both the first arc and the second arc are elliptical arcs.

3. The outdoor unit of the air conditioner according to claim 2, characterized in that, When the ratio of the first dimension to the second dimension is greater than 1.7, the ratio of the radius of the first arc to the second dimension, and the ratio of the radius of the second arc to the second dimension are both greater than or equal to 0.02 and less than or equal to 0.

15.

4. The outdoor unit of the air conditioner according to claim 3, characterized in that, When the ratio of the first dimension to the second dimension is greater than 1.7 and less than or equal to 2, the ratio of the radius of the first arc to the second dimension, and the ratio of the radius of the second arc to the second dimension are both greater than or equal to 0.02 and less than or equal to 0.

06. When the ratio of the first dimension to the second dimension is greater than 2, the ratio of the radius of the first arc to the second dimension, and the ratio of the radius of the second arc to the second dimension are both greater than 0.06 and less than or equal to 0.

15.

5. The outdoor unit of the air conditioner according to claim 2, characterized in that, When the ratio of the first dimension to the second dimension is less than or equal to 1.7, the major axis of the first arc and the major axis of the second arc are the same, and the minor axis of the first arc and the minor axis of the second arc are the same. The ratio of the major axis of the first arc to the second dimension is greater than or equal to 0.02 and less than or equal to 0.06, and the ratio of the minor axis of the first arc to the major axis of the first arc is greater than or equal to 0.5 and less than or equal to 0.

8.

6. The outdoor unit of the air conditioner according to claim 5, characterized in that, The ratio of the minor axis to the major axis of the first arc is positively correlated with the first dimension.

7. The outdoor unit of the air conditioner according to claim 2, characterized in that, The first air guide ring further includes a gradient ring segment, which is connected to the ventilation hole and to the end of the circular ring segment near the ventilation hole. The radial dimension of the gradient ring segment gradually increases along the direction near the ventilation hole.

Images