Air conditioner outdoor unit

Abstract

The application discloses an air conditioner outdoor unit, which comprises a machine shell, a heat exchanger and a fan arranged in the machine shell, an air outlet arranged on the machine shell, and a grille arranged at the air outlet. The grille comprises radial ribs. The radial ribs have a change in width along the radial direction of the grille from the center to the outer periphery, so that the spiral air outlet downstream of the fan is changed into axial air outlet, the static pressure resistance of the whole machine is improved, and the air supply distance is improved.

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 outdoor unit includes a casing, inside which a heat exchanger and a fan are housed. A grille is installed at the air outlet of the casing. When the outdoor unit is installed in a confined space or in an environment with louvers, the hot air exhausted from the outlet is affected by the airflow, resulting in a short air delivery distance. This affects the heat exchange efficiency of the outdoor unit and consequently, the overall cooling performance. Current air conditioners generally improve the heat exchange efficiency of the outdoor unit by optimizing the control mode of the cooling system, but this does not fundamentally solve the problem of the short air delivery distance.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] In response to the problems mentioned in the background art, the present invention proposes an outdoor unit for an air conditioner, which optimizes the structure of the grille to improve the air delivery distance.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] In some embodiments of this application, an outdoor unit for an air conditioner is provided, including a casing, a heat exchanger and a fan disposed within the casing, an air outlet on the casing, and a grille at the air outlet. The grille includes radial ribs extending radially outward from the center of the grille, and the width of the radial ribs varies along the air outlet direction.

[0007] The above technical solution has the following advantages or beneficial effects: The width of the radial ribs varies along the air outlet direction. The width of the radial ribs has both wide and narrow areas. The location of this width variation transforms the downstream spiral air outlet of the fan into axial air outlet, converting the circumferential velocity potential energy of the downstream airflow into pressure potential energy, thus improving the overall machine's resistance to static pressure and increasing the air delivery distance. Specifically, when the downstream spiral air outlet encounters the radial ribs, its direction is forcibly changed. To achieve axial air outlet while the fan is rotating, the width of the radial ribs needs to be increased to ensure this change in airflow direction. After the airflow direction changes, the concentration of the airflow is enhanced, increasing the average wind speed over a certain distance. This means the area of ​​concentrated wind speed decreases. With the same air volume, the increased wind speed results in a longer air delivery distance compared to before the change in airflow direction. When the air is blown out, the surrounding air has a viscous effect on it. The higher the wind speed, the better it resists this viscous effect, allowing the air to travel further, thus increasing the air delivery distance.

[0008] In some embodiments of this application, the maximum width of the radial rib is set at a radius of 60%-80% away from the center of the grille.

[0009] Another technical solution mentioned above has the following advantages or beneficial effects: Since the main air outlet area of ​​the fan is at 60%-80% of the radius when it rotates, that is, the wind speed is the highest in this area. By setting the maximum width of the radial ribs at a radius of 60%-80% away from the center of the grille, it helps to improve the air delivery and concentrating effect after the wind direction changes, thereby further increasing the distance.

[0010] In some embodiments of this application, the width of the radial ribs along the air outlet direction first decreases, then increases, and then decreases again in the radial direction from the center of the grille outwards.

[0011] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: Since the air outlet speed is different at different positions of the grille, the change in the width of the radial ribs in the embodiment of this application takes into account the air outlet speed of the outdoor unit, so as to achieve a better effect of increasing the air supply distance.

[0012] In some embodiments of this application, the maximum width of the radial rib is set at the position where the air outlet speed of the outdoor unit is maximum.

[0013] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: at the position with the highest air velocity, the wind speed cannot be changed directly, otherwise there will be a loss of flow velocity. Therefore, at the position with high wind speed, the width of the radial ribs is increased to take into account both the air delivery distance and the air delivery volume.

[0014] In some embodiments of this application, the radial rib has an outlet profile and an inlet profile. The radial rib is twisted in the opposite direction to the rotation direction of the fan, starting from the outlet profile, and reaches the upper limit of the twist at the position of the inlet profile at the corresponding radius.

[0015] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by using the torsion structure of the radial ribs, the airflow is guided, and more spiral airflow is converted into axial airflow, taking into account both air delivery distance and wind resistance, further improving the air delivery distance and air volume, while also helping to reduce wind resistance and wind noise.

[0016] In some embodiments of this application, the radial ribs include a first radial rib, a second radial rib, and a third radial rib in the radial direction from the center of the grid to the outer periphery.

[0017] The radial ribs include outlet profiles. The coordinate values ​​of the outlet profiles on the first section of the radial ribs along the air outlet direction first decrease and then increase along the radial direction from the center of the grille outwards. The coordinate values ​​of the outlet profiles on the second section of the radial ribs along the air outlet direction increase along the radial direction from the center of the grille outwards. The coordinate values ​​of the outlet profiles on the third section of the radial ribs along the air outlet direction decrease along the radial direction from the center of the grille outwards.

[0018] In some embodiments of this application, the radial ribs include a first radial rib, a second radial rib, and a third radial rib in the radial direction from the center of the grid to the outer periphery.

[0019] The radial ribs include inlet profiles. The coordinate values ​​of the inlet profiles on the first section of the radial ribs along the air outlet direction first increase and then decrease along the radial direction from the center of the grille outwards. The coordinate values ​​of the inlet profiles on the second section of the radial ribs along the air outlet direction decrease along the radial direction from the center of the grille outwards. The coordinate values ​​of the inlet profiles on the third section of the radial ribs along the air outlet direction first increase and then decrease along the radial direction from the center of the grille outwards.

[0020] In some embodiments of this application, the radial ribs include a first radial rib, a second radial rib, and a third radial rib in the radial direction from the center of the grid to the outer periphery.

[0021] The width variation trends of the first, second, and third radial ribs are different.

[0022] In some embodiments of this application, the radial ribs include a first radial rib, a second radial rib, and a third radial rib in the radial direction from the center of the grid to the outer periphery.

[0023] The radial ribs define multiple control surfaces, which are cross-sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, with the central axis of the cylinders coinciding with the center of the grille.

[0024] The radial rib includes an outlet profile and an inlet profile. The outlet profile has a first intersection point with the control surface, and the inlet profile has a second intersection point with the control surface. The center of the annular surface formed by the air inlet side of the outer frame of the grille is used as the origin of the coordinate system. The line connecting the first intersection point and the origin of the coordinate system is the first line, and the line connecting the second intersection point and the origin of the coordinate system is the second line. The included angle between the first line and the second line is the wrap angle of the radial rib.

[0025] Along the radial direction from the center of the grid outwards, the wrap angle on the first radial rib first increases and then decreases, the wrap angle on the second radial rib gradually decreases, and the wrap angle on the third radial rib gradually increases.

[0026] In some embodiments of this application, the radial ribs include a first radial rib, a second radial rib, and a third radial rib in the radial direction from the center of the grid to the outer periphery.

[0027] The radial ribs define multiple control surfaces, which are cross-sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, with the central axis of the cylinders coinciding with the center of the grille.

[0028] The X-axis extends outward from the center of the grille. The radial ribs include an outlet profile. The outlet profile has a first intersection point with the control surface. The center of the annular surface formed by the air inlet side of the outer frame of the grille is taken as the origin of the coordinate system. The angle between the line connecting the first intersection point and the origin of the coordinate system and the X-axis is the forward bending angle of the radial ribs.

[0029] Along the radial direction from the center of the grille outwards, the forward bending angle on the first radial rib first decreases and then increases, the forward bending angle on the second radial rib increases, and the forward bending angle on the third radial rib increases.

[0030] In some embodiments of this application, the radial ribs include a first radial rib, a second radial rib, and a third radial rib in the radial direction from the center of the grid to the outer periphery.

[0031] The radial ribs include outlet profiles and inlet profiles. In the radial direction from the center of the grille outwards, the coordinate values ​​of the outlet profiles and inlet profiles on the first section of the radial ribs increase along the air outlet direction. The coordinate values ​​of the outlet profiles and inlet profiles on the second section of the radial ribs first increase and then decrease along the air outlet direction. The coordinate values ​​of the outlet profiles and inlet profiles on the third section of the radial ribs decrease along the air outlet direction.

[0032] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1This is a structural diagram of an outdoor unit of an air conditioner according to some embodiments;

[0035] Figure 2 This is a structural diagram of a grille according to some embodiments;

[0036] Figure 3 This is a partial view of a grille according to some embodiments;

[0037] Figure 4 This is a structural diagram of yet another type of grille according to some embodiments;

[0038] Figure 5 This is a schematic diagram of the outlet profile and inlet profile of a grille according to some embodiments;

[0039] Figure 6 This is a schematic diagram of the wrap angle and forward bend angle of a grille according to some embodiments;

[0040] Figure 7 This is a schematic diagram of radial ribs of a grille according to some embodiments;

[0041] Figure 8 This is a schematic diagram of the outlet angle and inlet angle of a grille according to some embodiments;

[0042] Figure 9 This is a schematic diagram of the central arc of a grille according to some embodiments;

[0043] Figure 10 This is a schematic diagram of the air outlet of an outdoor unit in the prior art;

[0044] Figure 11 This is a schematic diagram of the air outlet of an outdoor unit according to some embodiments.

[0045] Figure label:

[0046] 10. Outdoor unit;

[0047] 100. Housing; 110. Air outlet; 120. Air return outlet;

[0048] 200. Grille; 210. Circumferential rib; 220. Radial rib; 221. Radial rib section 1; 222. Radial rib section 2; 223. Radial rib section 3; 224. First radial rib; 225. Second radial rib; 226. Third radial rib; 230. Inner frame; 240. Outer frame; 241. Air inlet side of outer frame;

[0049] 01. First control plane; 02. Second control plane; 03. Third control plane; 04. Fourth control plane;

[0050] 05. Mid-curve; 06. Export profile; 07. Import profile;

[0051] S, forward curve angle;

[0052] θ, wrap angle;

[0053] α, entrance angle;

[0054] β, exit angle. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the description of this application, 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 application 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 application.

[0057] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0061] In some embodiments of this application, an air conditioner is provided, which performs a refrigeration cycle or a heating cycle by using a compressor, a condenser, an expansion valve, and an evaporator.

[0062] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0063] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0064] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in either the indoor or outdoor unit.

[0065] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0066] In some embodiments of this application, an outdoor unit 10 is provided. Figure 1 This is a structural diagram of outdoor unit 10. Outdoor unit 10 includes a housing 100, which forms the external outline of outdoor unit 10. Outdoor unit 10 is provided with an air outlet 110 and a return air inlet 120. For example, air outlet 110 is located on the front side of housing 100, and return air inlet 120 is located on the rear side of housing 100. Outside air flows into housing 100 through return air inlet 120 and then flows out through air outlet 110.

[0067] The outdoor unit 10 also includes a heat exchanger, which is disposed in the inner cavity of the casing 100. As air flows from the return air inlet 120 to the air outlet 110, it passes through the heat exchanger, which is configured to exchange heat with the flowing air.

[0068] The outdoor unit 10 also includes a fan, which is located inside the housing 100 and is configured to provide power for air circulation.

[0069] The outdoor unit 10 also includes a grille 200, which is located at the air outlet 110. Figure 2 This is a structural diagram of the grating 200. Figure 3 for Figure 2 A partial structural diagram of the grille 200 shown. Figure 4 This is another structural diagram of the grille 200.

[0070] The grille 200 includes an inner frame 230. The inner frame 230 is located in the central area of ​​the grille 200. The inner frame 230 has a flat circular structure.

[0071] The grille 200 also includes an outer frame 240. The outer frame 240 is disposed on the outer periphery of the grille 200, forming the outer periphery outline of the grille 200.

[0072] The grille 200 also includes a plurality of spaced circumferential ribs 210, which extend circumferentially along the grille 200.

[0073] The grille 200 also includes a plurality of spaced radial ribs 220, which extend radially along the grille 200. (See reference...) Figure 2The radial ribs 220 can have various structural combinations in terms of their extension length along the radial direction of the grille 200, and this embodiment does not impose a specific limitation. For example, some radial ribs 220 extend from the inner frame 230 to the outer frame 240, and are referred to as the first radial rib 224. Some radial ribs 220 extend between two circumferential ribs 210, and are referred to as the second radial rib 225. Some radial ribs 220 extend between the circumferential ribs 210 and the outer frame 240, and are referred to as the third radial rib 226.

[0074] In some embodiments of this application, the width of the radial ribs 220 varies along the air outlet direction in the radial direction from the center of the grille 200 to the outer periphery, that is, along the radial direction from the inner frame 230 to the outer frame 240 of the grille 200. The maximum width of the first radial rib 224 is set at 60%-80% of the radius of the fan.

[0075] In existing technologies, the width of the radial ribs is fixed. In this embodiment, the width of the radial ribs 220 varies along the airflow direction. The width of the radial ribs 220 has both wide and narrow areas. The location of this width variation transforms the downstream spiral airflow of the fan into axial airflow, converting the circumferential velocity potential energy of the downstream airflow into pressure potential energy, thus improving the overall static pressure resistance and increasing the airflow distance. Specifically, when the downstream spiral airflow encounters the radial ribs 220, its direction is forcibly changed. Since the main airflow area of ​​the fan is at 60%-80% of its radius when rotating, where the wind speed is highest, an increase in the width of the radial ribs 220 is needed to achieve the desired axial airflow effect. After the wind direction changes, the airflow convergence is enhanced, increasing the average wind speed over a certain distance. This means the area of ​​concentrated wind speed decreases. With the same airflow volume, the increased wind speed results in a longer airflow distance compared to before the direction change. When wind blows out, the surrounding air has a sticky effect on it. The higher the wind speed, the better it can resist the sticky effect, and the farther it blows, thus increasing the air delivery distance.

[0076] It should be noted that the following descriptions of the shape changes of the radial ribs 220 all use the first radial rib 224 as an example. The first radial rib 224, the second radial rib 225, and the third radial rib 226, which are located at the same radius position of the grid 200, have the same shape.

[0077] In some embodiments of this application, the width of the first radial rib 224 along the air outlet direction first decreases, then increases, and then decreases again in the radial direction from the center of the grille 200 outwards.

[0078] In other words, since the air outlet speed is different at different positions of the grille 200, the change in the width of the radial rib 220 must take into account the air outlet speed of the outdoor unit 10 in order to achieve a better effect of increasing the air supply distance.

[0079] In some embodiments of this application, the maximum width of the first radial rib 224 is set at the position where the air outlet speed of the outdoor unit 10 is the maximum. At the position where the air outlet speed is the maximum, the air speed cannot be directly changed, otherwise there will be a loss of airflow. Therefore, the width of the first radial rib 224 is increased at the position where the air speed is high in order to balance the air supply distance and the air supply volume.

[0080] In some embodiments of this application, the radial rib 220 has a torsional change along the air outlet direction. Specifically, the radial rib 220 has an outlet profile and an inlet profile. The radial rib 220 starts from the outlet profile and twists in the opposite direction to the rotation direction of the fan, reaching the upper limit of the twist at the position of the inlet profile at the corresponding radius.

[0081] In other words, at different radii of the grille 200, the torsion of the radial ribs 220 begins at the location of the outlet profile and twists in the opposite direction to the rotation of the fan, reaching its maximum value at the corresponding inlet profile location. The torsion amplitude of the radial ribs 220 may be equal or unequal at different radii of the grille 200.

[0082] The radial ribs 220 are twisted to guide the airflow, converting more spiral airflow into axial airflow, taking into account both air delivery distance and wind resistance, further improving air delivery distance and air volume, while also helping to reduce wind resistance and wind noise.

[0083] For ease of detailed description, this embodiment establishes a spatial coordinate system (XYZ), with the X, Y, and Z axes perpendicular to each other. The X-axis is the radial direction from the center of the grille 200 outwards, and the Y-axis is the air outlet direction of the outdoor unit. The center of the annular surface formed by the air inlet side 241 of the outer frame of the grille 200 is used as the origin of the spatial coordinate system (XYZ).

[0084] In some embodiments of this application, reference is made to Figure 3 The grille 200 has an outlet profile 06 and an inlet profile 07. Figure 5 This is a schematic diagram of the outlet profile 06 and the inlet profile 07. The absolute value of the difference between the Y-axis coordinates of the outlet profile 06 and the inlet profile 07 is the width of the radial stiffener 220. From... Figure 5 It can also be seen that, along the direction from the center of the grille 200 to the outer periphery, the width of the radial ribs 220 first decreases, then increases, and then decreases again.

[0085] The meridional plane parameter is an important parameter of the radial rib 220. The meridional plane is the projection plane of the radial rib 220 onto the XY plane. In some embodiments of this application, the meridional plane modeling process of the radial rib 220 involves the exit profile 06 and the inlet profile 07.

[0086] To reduce the amount of data processing during modeling, the exit profile 06 is determined by N control points, and the entrance profile 07 is determined by the width of the exit profile 06 and the radial rib 220. For example, taking the first radial rib 224 as an example, its exit profile 06 is determined by 5 control points. The 5 control points are located at... Figure 5 The numbers 1, 2, 3, 4, and 5 are respectively marked in the middle.

[0087] Control points 4 and 5 are located at both ends of the exit profile 06. Since the length of exit profile 06 is fixed, the positions of control points 4 and 5 are also fixed. Adjust the X and Y coordinates of the three middle control points (control point 1, control point 2, and control point 3) to adjust the profile.

[0088] To reduce the cost of the grille 200, the maximum width Wmax of the radial ribs 220 is set to 20mm without affecting performance.

[0089] In some embodiments of this application, the radial rib 220 defines multiple control surfaces, which are cross-sections formed by cylinders of different radii cutting the radial rib 220 along the air outlet direction, with the central axis of the cylinders coinciding with the center of the grille 200. The radial rib 220 has an outlet profile 06 and an inlet profile 07.

[0090] Figures 5 to 7 In this process, four cylinders of different radii are used to cut the first radial rib 224 along the air outlet direction, resulting in four control surfaces, denoted as the first control surface 01, the second control surface 02, the third control surface 03, and the fourth control surface 04. The first control surface 01 is the outer circumferential surface of the inner frame 230, and the fourth control surface 04 is the inner circumferential surface of the outer frame. The first control surface 01 and the fourth control surface 04 are also the two end faces of the first radial rib 224.

[0091] The radial rib 220 has a forward bend angle. The X-axis extends outward from the center of the grille 200. The outlet profile 06 intersects the control surface at a first point. The center of the annular surface formed by the air inlet side 241 of the outer frame of the grille 200 is taken as the origin of the coordinate system. The angle between the line connecting the first intersection point and the origin and the X-axis is the forward bend angle of the radial rib 220. The markings on the air inlet side 241 of the outer frame are shown below. Figure 1 and Figure 2 The forward bend angle represents the position of the radial stiffener 220, and is independent of the structure of the radial stiffener 220.

[0092] The radial rib 220 has a wrap angle. The center of the annular surface formed by the air inlet side 241 of the outer frame of the grille 200 is taken as the origin of the coordinate system. The outlet profile 06 has a first intersection point with the control surface, and the inlet profile 07 has a second intersection point with the control surface. The line connecting the first intersection point and the origin of the coordinate system is the first line, and the line connecting the second intersection point and the origin of the coordinate system is the second line. The included angle between the first line and the second line is the wrap angle of the radial rib 220.

[0093] Taking the first radial stiffener 224 as an example, the first radial stiffener 224 has a forward bend angle S. (Refer to...) Figure 5 and 6 The outlet profile 06 and the outermost control surface, i.e. the outer frame 240, have a first intersection point. The center of the annular surface formed by the air inlet side 241 of the outer frame is taken as the origin of the coordinate system O. The line connecting the first intersection point and the origin of the coordinate system O is denoted as the first connecting line F1. The angle between the first connecting line F1 and the X-axis is denoted as the forward bending angle S.

[0094] The first radial rib 224 has a wrap angle θ. The exit profile 06 and the outer frame 240 have a first intersection point. The first intersection point is connected to the origin O of the coordinate system, and this connection is denoted as the first connection line F1. The entrance profile 07 and the outer frame 240 have a second intersection point. The second intersection point is connected to the origin O of the coordinate system, and this connection is denoted as the second connection line F2. The included angle between the first connection line F1 and the second connection line F2 is the wrap angle θ.

[0095] The radial rib 220 has an inlet angle α. The inlet angle α is the angle at which the airflow enters the radial rib 220, which is consistent with the outlet angle of the fan.

[0096] The radial rib 220 also has an exit angle β. The exit angle β is the angle at which the airflow exits the radial rib 220. Generally, the exit angle β is 90°.

[0097] exist Figure 8 In the diagram, the horizontal line K is a line parallel to the X-axis and extending in the negative direction of the X-axis. The intersection point of the horizontal line K and the two ends of the middle arc is denoted as P. The oblique line M is the tangent at the intersection point P. The angles formed by the tangent and the corresponding horizontal line K are the entrance angle α and the exit angle β, respectively.

[0098] The radial stiffener 220 involves the aforementioned angle parameters during the modeling process.

[0099] In some embodiments of this application, the radial rib 220 further includes a central arc line 05. Figure 9 This is a cross-sectional diagram of the radial stiffener 220, with the dashed line in the middle designated as the center arc line 05. Multiple center arc lines 05 are stacked along the length of the radial stiffener 220 to form a center arc surface. The center arc surface is then stacked to the left and right sides with a certain thickness to obtain the entire radial stiffener 220.

[0100] In some embodiments of this application, the thickness of the existing radial ribs is not changed for strength considerations. For example, the thickness of the radial rib 220 is 2.2 mm.

[0101] In some embodiments of this application, the modeling process of the radial rib 220 is as follows, taking the first radial rib 224 as an example, including:

[0102] First, confirm the shape of the meridional plane, that is, the rotational projection of the first radial rib 224 on the YZ plane, including the inlet profile 07 and the outlet profile 06;

[0103] Subsequently, the first radial rib 224 is cut along the air outlet direction using cylinders of different radii. The central axis of the cylinder coincides with the center point of the grille 200. The intersection surface between the cylinder and the first radial rib 224 is denoted as the cross section, which is also the control surface described below. Figure 7 As shown, multiple twisted mid-arc lines 05 are obtained through different cross sections. For example, the first radial rib 224 is cut along the air outlet direction using four cylinders with different radii to obtain four cross sections. The angles of the first radial rib 224 include the inlet angle α, the outlet angle β, the forward bend angle S, and the wrap angle θ.

[0104] By smoothly connecting the above multiple mid-arc lines 05, the mid-arc surface of the radial rib 220 is obtained;

[0105] A certain thickness is superimposed on both sides of the central arc surface to obtain the first radial rib 224.

[0106] In some embodiments of this application, along the radial direction from the center of the grille 200 outwards, the first radial rib 224 includes a first radial rib segment 221, a second radial rib segment 222, and a third radial rib segment 223. The widths of the first radial rib segment 221, the second radial rib segment 222, and the third radial rib segment 223 vary. It is understood that in other embodiments, the first radial rib 224 may be divided into more or fewer segments.

[0107] Since the air velocity varies at different locations of the grille 200, the width of different sections of the radial ribs 220 is designed to vary to achieve a better effect of increasing the air delivery distance.

[0108] In some embodiments of this application, the radius range of the grid where the first radial rib 221 is located is (80mm, 160mm), the radius range of the grid where the second radial rib 222 is located is (160mm, 240mm), and the radius range of the grid where the third radial rib 223 is located is (240mm, 320mm).

[0109] The maximum width of the radial rib 220 is obtained within the range of 220-260mm of the grid radius.

[0110] In some embodiments of this application, two specific structural forms of the grille 200 are given. Figure 2 The first type of grille 200 structure is shown. Figure 4 The second type of grille 200 structure is shown.

[0111] The following is a structural description of the first type of grille 200.

[0112] In some embodiments of this application, the forward bend angle is defined as S, R (mm) is the radius of the grid where the control surface is located, and S (°) is the forward bend angle value of the control surface. In the first type of grid 200, the axial projection of the exit profile 06 of the radial ribs 220 is straight, so the forward bend angle S is consistent. For example, the forward bend angle S is always 21.6°.

[0113] In some embodiments of this application, R (mm) is the radius of the grid where the control surface is located, and the wrap angle θ of the radial ribs at the grid radius where the control surface is located is 6.5 × 10. -7 ×R 3 -2.92×10 -4 ×R 2 +2×10 -2 ×R+3.6.

[0114] In some embodiments of this application, along the radial direction from the center of the grille 200 outwards, the wrap angle θ on the first radial rib 221 first increases and then decreases, the wrap angle θ on the second radial rib 222 gradually decreases, and the wrap angle θ on the third radial rib 223 gradually increases. The aforementioned changes in the wrap angles of the first, second, and third radial ribs 221 and 222 refer to the changes in the wrap angle corresponding to the control surface at different radii of each radial rib segment.

[0115] Specifically, along the radial direction from the center of the grille 200 outwards, the wrap angle θ on the first radial rib 221 first increases and then decreases with increasing radius (R), reaching its maximum value within the range of 130-140 mm. The wrap angle θ on the second radial rib 222 gradually decreases with increasing radius (R), with the rate of change gradually decreasing, reaching its minimum value when R = 240 mm. The wrap angle θ on the third radial rib 223 increases with increasing radius (R), with the rate of change gradually increasing, reaching its maximum value when R = 320 mm.

[0116] In some embodiments of this application, R (mm) is defined as the grid radius where the control surface is located, and B (mm) is the axial height of the outlet profile 06 and the inlet profile 07.

[0117] The axial height B1 of the exit profile is 4.6 × 10⁻⁶. -6 ×R 3 -2.4×10 -3 ×R 2 +3.3×10 -1 ×R-1.4×10.

[0118] Axial height of the inlet profile

[0119] B2 = 4.6 × 10 -12 ×R 6 -5.4×10 -9 ×R 5 +2.6×10 -6 ×R 4 -6.3×10 -4 ×R 3 +8.5×10 -2 ×R-6×R+5×10.

[0120] In some embodiments of this application, the coordinate value of the outlet profile 06 on the first radial rib 221 along the air outlet direction first decreases and then increases along the radial direction from the center of the grille 200 to the outer periphery; the coordinate value of the outlet profile 06 on the second radial rib 222 along the air outlet direction increases along the radial direction from the center of the grille 200 to the outer periphery; and the coordinate value of the outlet profile 06 on the third radial rib 223 along the air outlet direction decreases along the radial direction from the center of the grille 200 to the outer periphery.

[0121] Specifically, along the radial direction from the center of the grille 200 outwards, the Y-coordinate of the outlet profile 06 on the first radial rib 221 first decreases and then increases with increasing radius (R), reaching its minimum value within the range of 100-130 mm. The Y-coordinate of the outlet profile 06 on the second radial rib 222 gradually increases with increasing radius (R), but the rate of change gradually decreases, reaching its maximum value when R = 240 mm. The Y-coordinate of the outlet profile 06 on the third radial rib 223 decreases with increasing radius (R), while the rate of change gradually increases, reaching its minimum value when R = 320 mm.

[0122] In some embodiments of this application, the coordinate value of the inlet profile 07 on the first radial rib section 221 along the air outlet direction first increases and then decreases, the coordinate value of the inlet profile 07 on the second radial rib section 222 along the air outlet direction decreases, and the coordinate value of the inlet profile 07 on the third radial rib section 223 along the air outlet direction first increases and then decreases.

[0123] Specifically, along the radial direction from the center of the grille 200 outwards, the Y-coordinate of the entrance profile 07 on the first radial rib 221 first increases and then decreases with increasing radius (R), reaching its maximum value within the range of 90-110 mm. The Y-coordinate of the entrance profile 07 on the second radial rib 222 gradually decreases with increasing radius (R), reaching its maximum value at R = 240 mm. The Y-coordinate of the entrance profile 07 on the third radial rib 223 first increases and then decreases with increasing radius (R), reaching its minimum value at R = 320 mm.

[0124] In some embodiments of this application, Q (rad) is defined as the sum of the radian values ​​of the forward bend angle S and the wrap angle θ. Y is defined as △B / R, where R (mm) is the radius of the control surface of the grille 200, △B = B1 - B2, and △B is the width of the meridional plane of the grille 200 under radius R. Figure 7 The four control surfaces are designated as Control Surface 1 (01), Control Surface 2 (02), Control Surface 3 (03), and Control Surface 4 (04). These four control surfaces correspond to four mid-arc lines (05), designated as Mid-Arc Line 1, Mid-Arc Line 2, Mid-Arc Line 3, and Mid-Arc Line 4, respectively.

[0125] The first arc y1 = 9.2 × 10 2 ×Q 3 -1.2×10 3 ×Q 2 +4.9×10 2 ×Q-6.8×10;

[0126] The second arc y2 = 1.5 × 10 3 ×Q 3 -1.8×10 3 ×Q 2 +7.5×10 2 ×Q-10 2 ;

[0127] The third arc, y3, is 6.2 × 10. 4 ×Q 3 -7.2×10 4 ×Q 2 +2.8×10 4 ×Q-3.6×10 3 ;

[0128] The fourth arc, y4, is 1.8 × 10. 3 ×Q 3 -2.1×10 3 ×Q 2 +8.5×10 2 ×Q-1.1×10 2 .

[0129] The windward angle of the middle arc 05 is determined by the flow angle of the downstream airflow of the fan, and the outlet angle β gradually approaches 90° as R increases. The first and second middle arcs are quasi-circular arcs, while the third and fourth middle arcs are spline curves, and their rate of change gradually decreases from the windward side to the outlet side.

[0130] The following is a structural description of the second type of grille 200.

[0131] In some embodiments of this application, R (mm) is the radius of the grid where the control surface is located, and the forward bending angle S of the radial ribs at the grid radius where the control surface is located is 6.9 × 10⁻⁶. -4 ×R 2 -1.6×10 -1 ×R+2.9×10.

[0132] Along the radial direction from the center of the grille 200 outwards, the forward bending angle S on the first radial rib 221 first decreases and then increases, the forward bending angle S on the second radial rib 222 increases, and the forward bending angle S on the third radial rib 223 increases.

[0133] Specifically, the forward bending angle S on radial stiffener segment 221 first decreases and then increases with increasing R, while the rate of change remains constant, reaching its minimum value within the range of R = 110-130 mm. The forward bending angle S on radial stiffener segment 222 increases with increasing R, and the rate of change also increases. The forward bending angle S on radial stiffener segment 223 increases with increasing R, and the rate of change gradually increases, reaching its maximum value when R = 320 mm.

[0134] In some embodiments of this application, R (mm) is the radius of the grid where the control surface is located, and the wrap angle θ of the radial ribs at the grid radius where the control surface is located is 6.5 × 10. -7 ×R 3 -2.9×10 -4 ×R 2 +2×10 -2 ×R+3.6×10. The wrap angle θ decreases as R increases, ensuring that the value of 2πR / 360×wrap angle remains unchanged.

[0135] In some embodiments of this application, R (mm) is defined as the grid radius where the control surface is located, and B (mm) is the axial height of the outlet profile 06 and the inlet profile 07. The variation patterns of the outlet profile 06 and the inlet profile 07 are the same.

[0136] Axial height of the export profile

[0137] B1 = -3.2 × 10 -8 ×R 4 +3×10 -5 ×R3 -8.6×10 -3 ×R 2 +7.2×10 -1 ×R-1.8×10.

[0138] Axial height of the inlet profile

[0139] B2 = -3.2 × 10 -8 ×R 4 +3×10 -5 ×R 3 -8.6×10 -3 ×R 2 +7.1×10 -1 ×R+1.8×10.

[0140] The variation pattern of the outlet profile 06 and the inlet profile 07 is as follows: along the radial direction from the center of the grille 200 outwards, the coordinate values ​​of the outlet profile 06 and the inlet profile 07 on the first radial rib 221 along the air outlet direction increase; the coordinate values ​​of the outlet profile 06 and the inlet profile 07 on the second radial rib 222 along the air outlet direction first increase and then decrease; and the coordinate values ​​of the outlet profile 06 and the inlet profile 07 on the third radial rib 223 along the air outlet direction decrease.

[0141] Specifically, the Y-coordinate value of radial rib segment 221 increases with increasing R, while the rate of change gradually decreases. The Y-coordinate value of radial rib segment 222 first increases and then decreases with increasing R, with the absolute value of the rate of change first decreasing and then increasing, reaching its maximum value when R = 190-210 mm. The Y-coordinate value of radial rib segment 223 decreases with increasing R, with the rate of change gradually decreasing, reaching its minimum value when R = 320 mm.

[0142] In some embodiments of this application, Q (rad) is defined as the sum of the radian values ​​of the forward bend angle S and the wrap angle θ. Y is defined as △B / R, where R (mm) is the radius of the control surface of the grille 200, △B = B1 - B2, and △B is the width of the meridional plane of the grille 200 under radius R. Figure 7 The four control surfaces are designated as Control Surface 1 (01), Control Surface 2 (02), Control Surface 3 (03), and Control Surface 4 (04). These four control surfaces correspond to four mid-arc lines (05), designated as Mid-Arc Line 1, Mid-Arc Line 2, Mid-Arc Line 3, and Mid-Arc Line 4, respectively.

[0143] The first arc y1 = 2.8 × 10 2 ×Q 3 -3.9×10 2 ×Q 2 +1.8×10 2 ×Q-2.7×10;

[0144] The second arc y2 = 1.7 × 10 2 ×Q 3 -2.2×10 2 ×Q 2 +9.9×10×Q-1.5×10;

[0145] The third arc, y3 = 1.1 × 10 3 ×Q 3 -2.1×10 3 ×Q 2 +1.3×10 3 ×Q-2.7×10 2 ;

[0146] The fourth arc, y4, is 5.7 × 10. 2 ×Q 3 -1.6×10 3 ×Q 2 +1.6×10 3 ×Q-5.1×10 2 .

[0147] In some embodiments of this application, Figure 10 The existing outdoor unit 10 is a schematic diagram of air supply. The air supply angle is large, and the air volume is diffused, resulting in a short air supply distance. Figure 11 This is a schematic diagram of the air supply of the outdoor unit 10 of this application. The air supply angle is small, the air volume is concentrated, thereby increasing the air supply distance.

[0148] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0149] The above are merely specific embodiments 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, comprising: The casing is equipped with an air outlet and an air return outlet; A heat exchanger is disposed within the housing and is configured to exchange heat with the flowing air. A fan, disposed within the housing, is configured to provide power for airflow; and A grille is provided at the air outlet, the grille including radial ribs extending radially along the center of the grille outward in a radial direction, the width of the radial ribs varying along the air outlet direction; The maximum width of the radial rib is set at a radius of 60%-80% away from the center of the grid; Along the radial direction from the center of the grille outwards, the width of the radial ribs first decreases, then increases, and then decreases again in the air outlet direction; Along the radial direction from the center of the grid outward, the radial ribs include a first radial rib section, a second radial rib section, and a third radial rib section; The radial ribs have inlet profiles. The coordinate values ​​of the inlet profiles on the first section of the radial ribs along the air outlet direction first increase and then decrease along the radial direction from the center of the grille outwards. The coordinate values ​​of the inlet profiles on the second section of the radial ribs along the air outlet direction decrease along the radial direction from the center of the grille outwards. The coordinate values ​​of the inlet profiles on the third section of the radial ribs along the air outlet direction first increase and then decrease along the radial direction from the center of the grille outwards.

2. The outdoor unit of the air conditioner according to claim 1, wherein, The maximum width of the radial rib is set at the position where the air outlet speed of the outdoor unit is at its maximum.

3. The outdoor unit of the air conditioner according to claim 1 or 2, wherein, The radial rib has an outlet profile and an inlet profile. The radial rib is twisted in the opposite direction to the rotation direction of the fan, starting from the outlet profile.

4. The outdoor unit of the air conditioner according to claim 1 or 2, wherein, Along the radial direction from the center of the grid outward, the radial ribs include a first radial rib section, a second radial rib section, and a third radial rib section; The radial ribs have outlet profiles. The coordinate values ​​of the outlet profiles on the first section of the radial ribs along the air outlet direction first decrease and then increase along the radial direction from the center of the grille outwards. The coordinate values ​​of the outlet profiles on the second section of the radial ribs along the air outlet direction increase along the radial direction from the center of the grille outwards. The coordinate values ​​of the outlet profiles on the third section of the radial ribs along the air outlet direction decrease along the radial direction from the center of the grille outwards.

5. The outdoor unit of the air conditioner according to claim 1 or 2, wherein, Along the radial direction from the center of the grid outward, the radial ribs include a first radial rib section, a second radial rib section, and a third radial rib section; The width variation trends of the first, second, and third radial ribs are different.

6. The outdoor unit of the air conditioner according to claim 1 or 2, wherein, Along the radial direction from the center of the grid outward, the radial ribs include a first radial rib section, a second radial rib section, and a third radial rib section; The radial ribs define multiple control surfaces, which are cross-sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, with the central axis of the cylinders coinciding with the center of the grille. The radial rib has an outlet profile and an inlet profile. The outlet profile has a first intersection point with the control surface, and the inlet profile has a second intersection point with the control surface. The center of the annular surface formed by the air inlet side of the outer frame of the grille is taken as the origin of the coordinate system. The line connecting the first intersection point and the origin of the coordinate system is the first line, and the line connecting the second intersection point and the origin of the coordinate system is the second line. The included angle between the first line and the second line is the wrap angle of the radial rib. Along the radial direction from the center of the grid outwards, the wrap angle on the first radial rib first increases and then decreases, the wrap angle on the second radial rib gradually decreases, and the wrap angle on the third radial rib gradually increases.

7. The outdoor unit of the air conditioner according to claim 1 or 2, wherein, Along the radial direction from the center of the grid outward, the radial ribs include a first radial rib section, a second radial rib section, and a third radial rib section; The radial ribs define multiple control surfaces, which are cross-sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, with the central axis of the cylinders coinciding with the center of the grille. The X-axis extends outward from the center of the grille. The radial ribs have an outlet profile. The outlet profile intersects the control surface at a first point. The center of the annular surface formed by the air inlet side of the grille's outer frame serves as the origin of the coordinate system. The angle between the line connecting the first intersection point and the origin of the coordinate system and the X-axis is the forward bending angle of the radial rib. In the radial direction outward from the center of the grille, the forward bending angle on the first segment of the radial rib first decreases and then increases, the forward bending angle on the second segment of the radial rib increases, and the forward bending angle on the third segment of the radial rib increases.

8. The outdoor unit of the air conditioner according to claim 1 or 2, wherein, Along the radial direction from the center of the grid outward, the radial ribs include a first radial rib section, a second radial rib section, and a third radial rib section; The radial ribs have outlet profiles and inlet profiles. In the radial direction from the center of the grille outwards, the coordinate values ​​of the outlet profiles and inlet profiles on the first section of the radial ribs increase along the air outlet direction. The coordinate values ​​of the outlet profiles and inlet profiles on the second section of the radial ribs first increase and then decrease along the air outlet direction. The coordinate values ​​of the outlet profiles and inlet profiles on the third section of the radial ribs decrease along the air outlet direction.

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