Air conditioner outdoor unit

Abstract

The air conditioner outdoor unit comprises a machine shell, a heat exchanger and a fan are arranged in the machine shell, an air outlet is formed in the machine shell, and a grating is arranged at the air outlet. The grating comprises radial ribs. The radial ribs extend in the radial direction of the grille, the width of the radial ribs in the air outlet direction changes in the radial direction from the center of the grille to the periphery of the grille, downstream spiral air outlet 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 increased.

Description

Technical Field

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

[0002] The outdoor unit of the air conditioner includes a housing, a heat exchanger and a fan are arranged in the housing, and a grille is arranged at the air outlet of the housing. When the outdoor unit is installed in a narrow position or in an environment with blinds, the hot air discharged from the air outlet of the outdoor unit is affected by the air field, and the air supply distance of the hot air is short, which affects the heat exchange efficiency of the outdoor unit and further affects the cooling effect of the whole unit. Existing air conditioners generally improve the heat exchange efficiency of the outdoor unit by optimizing the control mode of the refrigeration system, but do not fundamentally solve the problem of the short air supply distance of the outdoor unit.

[0003] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the problems pointed out in the background technology, the present invention proposes an air conditioner outdoor unit, which optimizes the structure of the grille and increases the air supply distance.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] In some embodiments of the present application, an air conditioner outdoor unit is provided, including a housing, a heat exchanger and a fan are arranged in the housing, an air outlet is arranged on the housing, and a grille is arranged at the air outlet. The grille includes radial ribs. Extending radially along the grille, along the radial direction from the center of the grille to the outer periphery, the width of the radial ribs along the air outlet direction varies.

[0007] The above technical solution has the following advantages or beneficial effects: the width of the radial ribs changes along the air outlet direction, the width of the radial ribs has wide areas and narrow areas, and the position where the width of the radial ribs changes changes the spiral air outlet downstream of the fan into axial air outlet, that is, the circumferential velocity potential energy of the downstream wind speed is converted into pressure potential energy, the anti-static pressure ability of the whole machine is improved, and the air supply distance can be improved. Specifically, when the spiral air outlet downstream of the fan hits the radial ribs, the wind direction will be forced to change. When the fan is rotating, if you want to achieve the effect of axial air outlet, you need to increase the width of the radial ribs to ensure the effect of changing the wind direction. After the wind direction changes, the gathering type of the air supply is improved, and the average wind speed at a certain distance is improved, that is, the area where the wind speed is concentrated becomes smaller. Under the same air volume, the wind speed is increased, and when it is blown out, the air supply distance is increased compared to before the wind direction changes. When the wind is blown out, the surrounding gas has a viscous effect on it. The higher the wind speed, the better it can resist the viscous effect, and the farther it blows, the effect of increasing the air supply distance is achieved.

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

[0009] Another technical solution among the above technical solutions 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 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 supply and gathering effect after the wind direction changes, thereby further increasing the distance.

[0010] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the width of the radial ribs along the air outlet direction first decreases, then increases, and then decreases.

[0011] Another technical solution among the above technical solutions 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 the present application takes into account the air outlet speed of the outdoor unit to achieve a better effect of increasing the air supply distance.

[0012] In some embodiments of the present application, the maximum width of the radial ribs is set at the maximum wind speed position of the outdoor unit.

[0013] Another technical solution among the above technical solutions has the following advantages or beneficial effects: at the position where the wind speed is the highest, the wind speed cannot be directly changed, otherwise there will be flow rate loss, so the width of the radial ribs is increased at the position where the wind speed is high to take into account both the air supply distance and the air supply volume.

[0014] In some embodiments of the present application, the radial rib has an outlet profile and an inlet profile. The radial rib takes the outlet profile as a starting position and twists in a direction opposite to the rotation direction of the fan, and the position of the inlet profile at the corresponding radius reaches an upper limit of the twisting.

[0015] Another technical solution among the above technical solutions has the following advantages or beneficial effects: through the torsional structure of the radial ribs, the airflow is guided to convert more spiral air outlets into axial air outlets, taking into account the air supply distance and wind resistance, further improving the air supply distance and air supply volume, and at the same time helping to reduce wind resistance and reduce wind noise.

[0016] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the radial ribs include radial rib section one, radial rib section two, and radial rib section three;

[0017] The radial ribs include an outlet profile, wherein the coordinate value of the outlet profile on the first section of the radial rib along the air outlet direction first decreases and then increases along the radial direction from the center of the grille to the periphery, the coordinate value of the outlet profile on the second section of the radial rib along the air outlet direction increases along the radial direction from the center of the grille to the periphery, and the coordinate value of the outlet profile on the third section of the radial rib along the air outlet direction decreases along the radial direction from the center of the grille to the periphery.

[0018] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the radial ribs include radial rib section one, radial rib section two, and radial rib section three;

[0019] The radial ribs include an inlet profile, and the coordinate value of the inlet profile on the first section of the radial rib along the air outlet direction first increases and then decreases along the radial direction from the center of the grille to the periphery, the coordinate value of the inlet profile on the second section of the radial rib along the air outlet direction decreases along the radial direction from the center of the grille to the periphery, and the coordinate value of the inlet profile on the third section of the radial rib along the air outlet direction first increases and then decreases along the radial direction from the center of the grille to the periphery.

[0020] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the radial ribs include radial rib section one, radial rib section two, and radial rib section three;

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

[0022] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the radial ribs include radial rib section one, radial rib section two, and radial rib section three;

[0023] The radial ribs define a plurality of control surfaces, wherein the plurality of control surfaces are sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, and the central axis of the cylinder coincides with the center of the grille;

[0024] The radial ribs include an outlet profile and an inlet profile, the outlet profile and the control surface have a first intersection, the inlet profile and the control surface have a second intersection, the center of the annular surface formed on the wind inlet side of the outer frame of the grille is used as the coordinate origin, the line connecting the first intersection and the coordinate origin is a first line, the line connecting the second intersection and the coordinate origin is a second line, and the angle between the first line and the second line is the wrap angle of the radial ribs;

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

[0026] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the radial ribs include radial rib section one, radial rib section two, and radial rib section three;

[0027] The radial ribs define a plurality of control surfaces, wherein the plurality of control surfaces are sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, and the central axis of the cylinder coincides with the center of the grille;

[0028] The direction from the center of the grille to the outer circumference is the X-axis, the radial ribs include an outlet profile, the outlet profile and the control surface have a first intersection, the center of the annular surface formed on the wind inlet side of the outer frame of the grille is used as the coordinate origin, and the angle between the first intersection and the coordinate origin and the X-axis is the forward bending angle of the radial ribs;

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

[0030] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille, the radial ribs include radial rib section one, radial rib section two, and radial rib section three;

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

[0032] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

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

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

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

[0038] Figure 5 A schematic diagram of an outlet profile and an inlet profile of a grille according to some embodiments;

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

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

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

[0042] Fig. 9 is a schematic diagram of a middle arc line of a grille according to some embodiments;

[0043] Fig.10 A schematic diagram of an air outlet of an outdoor unit in the prior art;

[0044] Fig.11 A schematic diagram of air outlet of an outdoor unit according to some embodiments.

[0045] Reference numerals:

[0046] 10. Outdoor unit;

[0047] 100, housing; 110, air outlet; 120, air return outlet;

[0048] 200, grille; 210, circumferential ribs; 220, radial ribs; 221, radial rib section 1; 222, radial rib section 2; 223, radial rib section 3; 224, first radial ribs; 225, second radial ribs; 226, third radial ribs; 230, inner frame; 240, outer frame; 241, wind inlet side of outer frame;

[0049] 01, 1st control surface; 02, 2nd control surface; 03, 3rd control surface; 04, 4th control surface;

[0050] 05, center arc line; 06, exit line; 07, entrance line;

[0051] S, front bend angle;

[0052] θ, wrap angle;

[0053] α, entrance angle;

[0054] β, outlet angle. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

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

[0062] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and 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 and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

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

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

[0066] In some embodiments of the present application, the present application provides an outdoor unit 10, Figure 1 1 is a structural diagram of an outdoor unit 10, and the outdoor unit 10 includes a housing 100, and the housing 100 constitutes the outer contour of the outdoor unit 10. An air outlet 110 and an air return outlet 120 are provided on the outdoor unit 10. For example, the air outlet 110 is provided at the front side of the housing 100, and the air return outlet 120 is provided at the rear side of the housing 100. External air flows into the housing 100 through the air return outlet 120, and then flows out through the air outlet 110.

[0067] The outdoor unit 10 further includes a heat exchanger, which is disposed in the inner cavity of the housing 100. When the air flows from the return air port 120 to the air outlet 110, the air flows through the heat exchanger, and the heat exchanger is configured to perform heat exchange on the air flowing therethrough.

[0068] The outdoor unit 10 further includes a fan, which is disposed in the inner cavity of the casing 100 and is configured to provide power for air circulation.

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

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

[0071] The grille 200 further includes an outer frame 240. The outer frame 240 is disposed at the outer periphery of the grille 200 to form an outer periphery of the grille 200.

[0072] The grille 200 further includes a plurality of circumferential ribs 210 arranged at intervals, and the circumferential ribs 210 extend along the circumference of the grille 200 .

[0073] The grille 200 further includes a plurality of radial ribs 220 arranged at intervals, and the radial ribs 220 extend in the radial direction of the grille 200. Figure 2The radial ribs 220 may extend in the radial direction of the grille 200 in various structural combinations, which are not specifically limited in this embodiment. For example, some radial ribs 220 extend from the inner frame 230 to the outer frame 240, which are recorded as first radial ribs 224. Some radial ribs 220 extend between two circumferential ribs 210, which are recorded as second radial ribs 225. Some radial ribs 220 extend between the circumferential ribs 210 and the outer frame 240, which are recorded as third radial ribs 226.

[0074] In some embodiments of the present application, the width of the radial ribs 220 along the air outlet direction varies along the radial direction from the center to the periphery of the grille 200, 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 the prior art, the width of the radial ribs is fixed. In this embodiment, the width of the radial ribs 220 is set to change along the air outlet direction. The width of the radial ribs 220 has a wide area and a narrow area. The position where the width of the radial ribs 220 changes changes the spiral air outlet downstream of the fan into an axial air outlet, that is, the circumferential velocity potential energy of the downstream wind speed is converted into pressure potential energy, thereby improving the anti-static pressure capability of the whole machine and the air supply distance. Specifically, when the spiral air outlet downstream of the fan hits the radial ribs 220, the wind direction will be forced to change. When the fan is rotating, its main air outlet area is at 60%-80% of the radius, that is, the wind speed is the highest here. If you want to achieve the effect of axial air outlet, you need to increase the width of the radial ribs 220 to ensure the effect of wind direction change. After the wind direction changes, the gathering type of the air supply is improved, and the average wind speed at a certain distance is increased, that is, the area where the wind speed is concentrated becomes smaller. Under the same air volume, the wind speed is increased, and when it is blown out, the air supply distance is increased compared to before the wind direction changes. When the wind is blown out, the surrounding gas has a sticky effect on it. The higher the wind speed, the better it can resist the sticky effect and the farther it blows, achieving the effect of increasing the air supply distance.

[0076] It should be noted that the following description of the shape change of the radial ribs 220 is based on the first radial ribs 224. The shapes of the first radial ribs 224, the second radial ribs 225, and the third radial ribs 226 at the same radial position of the grille 200 are the same.

[0077] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille 200, the width of the first radial ribs 224 along the air outlet direction first decreases, then increases, and then decreases.

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

[0079] In some embodiments of the present application, the maximum width of the first radial rib 224 is set at the maximum wind speed position of the outdoor unit 10. At the maximum wind speed position, the wind speed cannot be directly changed, otherwise there will be a flow loss, so the width of the first radial rib 224 is increased at the position with high wind speed to take into account both the air supply distance and the air supply volume.

[0080] In some embodiments of the present application, the radial ribs 220 have twisting changes along the air outlet direction. Specifically, the radial ribs 220 have an outlet profile and an inlet profile. The radial ribs 220 take the outlet profile as the starting position and twist in the direction opposite to the rotation direction of the fan, and the position of the inlet profile at the corresponding radius reaches the upper limit of the twisting position.

[0081] In other words, at different radii of the grille 200, the torsion of the radial ribs 220 starts from the position of the outlet profile, and twists in the direction opposite to the rotation direction of the fan, reaching the maximum twist position value at the corresponding inlet profile position. The torsion amplitude of the radial ribs 220 at different radii of the grille 200 is equal or unequal.

[0082] Through the torsion structure of the radial ribs 220, the airflow is guided to convert more spiral air into axial air, taking into account both the air supply distance and wind resistance, further improving the air supply distance and air supply volume, while helping to reduce wind resistance and wind noise.

[0083] For the convenience of detailed description, the present embodiment establishes a spatial coordinate system (XYZ), wherein the X-axis, Y-axis, and Z-axis are perpendicular to each other, the X-axis is the radial direction from the center of the grille 200 to the periphery, and the Y-axis is the air outlet direction along 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 coordinate origin of the spatial coordinate system (XYZ).

[0084] In some embodiments of the present application, refer to Figure 3 The grille 200 has an outlet profile 06 and an inlet profile 07 . Figure 5 Schematic diagram of the outlet profile 06 and the inlet profile 07. The absolute value of the difference between the coordinate values ​​of the outlet profile 06 and the inlet profile 07 along the Y axis is the width of the radial rib 220. Figure 5 It can also be seen that, from the center to the periphery of the grille 200 , the width of the radial ribs 220 first decreases, then increases, and then decreases again.

[0085] The meridian plane parameter is an important parameter of the radial rib 220. The meridian plane is the projection plane of the radial rib 220 on the XY plane. In some embodiments of the present application, the meridian plane modeling process of the radial rib 220 involves the outlet profile 06 and the inlet profile 07.

[0086] In order to reduce the amount of data processing in the modeling process, the outlet profile 06 is determined by N control points, and the inlet profile 07 is determined by the outlet profile 06 and the width of the radial rib 220. For example, taking the first radial rib 224 as an example, its outlet profile 06 is determined by 5 control points. Figure 5 They are marked with numbers 1, 2, 3, 4, and 5 respectively.

[0087] The 4th and 5th control points are located at the two ends of the outlet profile 06. Since the length of the outlet profile 06 is fixed, the positions of the 4th and 5th control points are fixed. Adjust the X and Y coordinates of the three middle control points (1st, 2nd and 3rd control points) to adjust the profile.

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

[0089] In some embodiments of the present application, the radial ribs 220 define a plurality of control surfaces, which are sections formed by cutting the radial ribs 220 along the air outlet direction through cylinders of different radii, and the central axis of the cylinder coincides with the center of the grille 200. The radial ribs 220 have an outlet profile 06 and an inlet profile 07.

[0090] Figures 5 to 7 In the embodiment, four cylinders with different radii are used to cut the first radial rib 224 along the air outlet direction to obtain four control surfaces, which are respectively recorded as the first control surface 01, the second control surface 02, the third control surface 03, and the fourth control surface 04. Among them, the first control surface 01 is the outer peripheral surface of the inner frame 230, and the fourth control surface 04 is the inner peripheral surface of the outer frame. The first control surface 01 and the fourth control surface 04 are also the two end surfaces of the first radial rib 224.

[0091] The radial ribs 220 have a forward bending angle. The X-axis is along the center of the grille 200 to the outer circumference. There is a first intersection between the outlet profile 06 and the control surface. 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 coordinate origin. The first intersection and the coordinate origin are connected by a line. The angle between the line and the X-axis is the forward bending angle of the radial ribs 220. The marking of the air inlet side 241 of the outer frame is referenced to Figure 1 and Figure 2 The forward bend angle represents the position of the radial rib 220 and has nothing to do with the structure of the radial rib 220 .

[0092] The radial ribs 220 have a wrap angle. The center of the annular surface formed by the wind inlet side 241 of the outer frame of the grille 200 is used as the coordinate origin. There is a first intersection between the outlet profile 06 and the control surface, and there is a second intersection between the inlet profile 07 and the control surface. The line connecting the first intersection and the coordinate origin is the first line, and the line connecting the second intersection and the coordinate origin is the second line. The angle between the first line and the second line is the wrap angle of the radial ribs 220.

[0093] Taking the first radial rib 224 as an example, the first radial rib 224 has a forward bending angle S. Figure 5 and 6 There is a first intersection between the outlet profile 06 and the outermost control surface, that is, the outer frame 240. The center of the annular surface formed by the wind inlet side 241 of the outer frame is used as the coordinate origin O. The line connecting the first intersection and the coordinate origin O is recorded as the first line F1. The angle between the first line F1 and the X-axis is recorded as the forward bend angle S.

[0094] The first radial rib 224 has a wrap angle θ. A first intersection is provided between the outlet profile 06 and the outer frame 240, and the first intersection is connected to the coordinate origin O, and the connection line is recorded as the first connection line F1. A second intersection is provided between the inlet profile 07 and the outer frame 240, and the second intersection is connected to the coordinate origin O, and the connection line is recorded as the second connection line F2. The angle between the first connection line F1 and the second connection line F2 is the wrap angle θ.

[0095] The radial ribs 220 have an inlet angle α, which is the angle at which the airflow enters the radial ribs 220 and is consistent with the air outlet angle of the fan.

[0096] The radial ribs 220 also have an outlet angle β. The outlet angle β is the angle at which the airflow flows out of the radial ribs 220. Generally, the outlet angle β is 90°.

[0097] exist Figure 8 In the figure, the horizontal line K is a line parallel to the X-axis and extending toward the negative direction of the X-axis. The intersection of the horizontal line K and the two ends of the middle arc is marked as P, and the oblique line M is the tangent at the intersection 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 ribs 220 involve the above-mentioned angle parameters during the modeling process.

[0099] In some embodiments of the present application, the radial rib 220 further includes a mid-arc line 05. Fig. 9 : is a cross-sectional schematic diagram of the radial rib 220, and the middle dotted line is marked as the middle arc line 05. Multiple middle arc lines 05 are stacked along the length direction of the radial rib 220 to obtain a middle arc surface. The middle arc surface is then stacked to the left and right sides with a certain thickness to obtain the entire radial rib 220.

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

[0101] In some embodiments of the present 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 meridian plane shape, 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] Then, a cylinder with different radii is used to cut the first radial rib 224 along the air outlet direction, and 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 recorded as a cross section, which is also the control surface described below, such as Figure 7 As shown, a plurality of twisted mid-arc lines 05 are obtained through different cross sections. For example, four cylinders with different radii are used to cut the first radial rib 224 along the air outlet direction to obtain four cross sections. The angles of the first radial rib 224 include an inlet angle α, an outlet angle β, a forward bend angle S, and a wrap angle θ.

[0104] The plurality of middle arc lines 05 are smoothly connected to obtain the middle arc surface of the radial rib 220;

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

[0106] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille 200, 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 differently. It is understood that in other embodiments, the first radial rib 224 may be divided into more or fewer segments.

[0107] Since the air outlet speeds are different at different positions of the grille 200, the widths of different sections of the radial ribs 220 are designed to vary differently, so as to achieve a better effect of increasing the air supply distance.

[0108] In some embodiments of the present application, the radial rib section 221 is located in a grille radius range of (80mm, 160mm], the radial rib section 222 is located in a grille radius range of (160mm, 240mm], and the radial rib section 323 is located in a grille radius range of (240mm, 320mm].

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

[0110] In some embodiments of the present application, two specific structural forms of the grille 200 are provided. Figure 2 The first grid 200 structure is shown. Figure 4 A second grid 200 structure is shown.

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

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

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

[0114] In some embodiments of the present application, along the radial direction from the center to the periphery of the grille 200, the wrap angle θ on the first radial rib section 221 first increases and then decreases along the radial direction from the center to the periphery of the grille 200, the wrap angle θ on the second radial rib section 222 gradually decreases along the radial direction from the center to the periphery of the grille 200, and the wrap angle θ on the third radial rib section 223 gradually increases along the radial direction from the center to the periphery of the grille 200. The above-mentioned wrap angle changes on the first radial rib section 221, the second radial rib section 222, and the third radial rib section 223 refer to the changes in the wrap angle corresponding to the control surface at different radii of each radial rib section.

[0115] Specifically, along the radial direction from the center to the periphery of the grille 200, the wrap angle θ on the first segment of the radial rib 221 increases first and then decreases as R increases, and the maximum wrap angle θ of the first segment of the radial rib 221 is obtained in the range of the grille radius of 130-140 mm. The wrap angle θ on the second segment of the radial rib 222 gradually decreases as R increases, and the rate of change gradually decreases, reaching the minimum wrap angle θ when R = 240 mm. The wrap angle θ on the third segment of the radial rib 223 increases as R increases, and the rate of change gradually increases, and reaches the maximum wrap angle θ when R = 320 mm.

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

[0117] Axial height of outlet profile B1 = 4.6 × 10 -6 ×R 3 -2.4×10 -3 ×R 2 +3.3×10 -1 ×R-1.4×10.

[0118] Axial height of 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 the present application, the coordinate value of the outlet profile 06 on the first radial rib section 221 along the air outlet direction first decreases and then increases along the radial direction from the center of the grille 200 to the periphery, the coordinate value of the outlet profile 06 on the second radial rib section 222 along the air outlet direction increases along the radial direction from the center of the grille 200 to the periphery, and the coordinate value of the outlet profile 06 on the third radial rib section 223 along the air outlet direction decreases along the radial direction from the center of the grille 200 to the periphery.

[0121] Specifically, along the radial direction from the center to the periphery of the grille 200, the Y coordinate of the outlet profile 06 on the radial rib section 1 221 first decreases and then increases as R increases, and the minimum value of the Y coordinate is obtained in the range of R of 100-130 mm. The Y coordinate of the outlet profile 06 on the radial rib section 222 gradually increases as R increases, but the rate of change gradually decreases, and the maximum value of the Y coordinate is reached when R = 240 mm. The Y coordinate of the outlet profile 06 on the radial rib section 3 223 decreases as R increases, and the rate of change gradually increases, and the minimum value of the Y coordinate is reached when R = 320 mm.

[0122] In some embodiments of the present 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 to the periphery of the grille 200, the Y coordinate of the inlet profile 07 on the radial rib section 1 221 increases first and then decreases as R increases, and the maximum value of the Y coordinate is obtained in the range of R of 90-110 mm. The Y coordinate of the inlet profile 07 on the radial rib section 222 gradually decreases as R increases, and the rate of change gradually decreases, reaching the maximum value of the Y coordinate when R=240 mm. The Y coordinate of the inlet profile 07 on the radial rib section 3 223 increases first and then decreases as R increases, and the change first increases and then decreases, reaching the minimum value of the Y coordinate when R=320 mm.

[0124] In some embodiments of the present application, Q (rad) is defined as the sum of the radians of the front bending angle S and the wrap angle θ. Y = △B / R is defined, where R (mm) is the radius of the control surface of the grid 200, △B = B1-B2, and △B is the width of the meridian plane of the grid 200 at the radius R. Figure 7 The four control surfaces in are respectively recorded as the first control surface 01, the second control surface 02, the third control surface 03, and the fourth control surface 04. The four control surfaces correspond to four middle arcs 05, which are respectively recorded as the first middle arc, the second middle arc, the third middle arc, and the fourth middle arc.

[0125] The first median 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 median arc y2 = 1.5 × 10 3 ×Q 3 -1.8×10 3 ×Q 2 +7.5×10 2 ×Q-10 2 ;

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

[0128] The fourth middle arc y4 = 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 airflow downstream of the fan, and the outlet angle β gradually approaches 90° as R increases. The first and second middle arcs are quasi-circular arcs, and 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 grid 200 .

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

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

[0133] Specifically, the front bend angle S on the first radial rib section 221 decreases first and then increases as R increases, and the rate of change remains unchanged, and the minimum value of the front bend angle S is obtained in the range of R = 110-130 mm. The front bend angle S on the second radial rib section 222 increases as R increases, and the rate of change increases. The front bend angle S on the third radial rib section 223 increases as R increases, and the rate of change gradually increases, reaching the maximum value of the front bend angle S when R = 320 mm.

[0134] In some embodiments of the present application, R (mm) is the radius of the grid where the control surface is located, and the wrap angle of the radial ribs at the radius of the grid where the control surface is located is θ=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×the wrap angle remains unchanged.

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

[0136] Axial height of outlet 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 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 changing rule of the outlet profile 06 and the inlet profile 07 is as follows: along the radial direction from the center to the periphery of the grille 200, the coordinate values ​​of the outlet profile 06 and the inlet profile 07 on the first radial rib section 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 section 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 section 223 along the air outlet direction decrease.

[0141] Specifically, the Y coordinate value on the radial rib section 1 221 increases with the increase of R, and the rate of change gradually decreases. The Y coordinate value on the radial rib section 222 increases first and then decreases with the increase of R, and the absolute value of the rate of change first decreases and then increases, reaching the maximum value of the Y coordinate when R = 190-210 mm. The Y coordinate value on the radial rib section 3 223 decreases with the increase of R, and the rate of change gradually decreases, and the minimum value of the Y coordinate is obtained when R = 320 mm.

[0142] In some embodiments of the present application, Q (rad) is defined as the sum of the radians of the front bending angle S and the wrap angle θ. Y = △B / R is defined, where R (mm) is the radius of the control surface of the grid 200, △B = B1-B2, and △B is the width of the meridian plane of the grid 200 at the radius R. Figure 7 The four control surfaces in are respectively recorded as the first control surface 01, the second control surface 02, the third control surface 03, and the fourth control surface 04. The four control surfaces correspond to four middle arcs 05, which are respectively recorded as the first middle arc, the second middle arc, the third middle arc, and the fourth middle arc.

[0143] The first median 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 median arc y2 = 1.7 × 10 2 ×Q 3 -2.2×10 2 ×Q 2 +9.9×10×Q-1.5×10;

[0145] The third median 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 middle arc y4 = 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 the present application, Fig.10 The existing outdoor unit 10 is a schematic diagram of air supply, in which the air supply angle is large and the air volume is diffused, resulting in a short air supply distance. Fig.11 This is a schematic diagram of the air supply of the outdoor unit 10 of the present application. The air supply angle is small and 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 a suitable manner in any one or more embodiments or examples.

[0149] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioner outdoor unit, comprising: The casing is provided with an air outlet and an air return outlet; a heat exchanger disposed in the housing, the heat exchanger being configured to perform heat exchange on air flowing therethrough; A fan is disposed in the housing, and the fan is configured to provide air circulation power; and A grille is arranged at the air outlet, and the grille includes radial ribs extending in the radial direction of the grille. The width of the radial ribs varies along the radial direction from the center to the periphery of the grille along the air outlet direction.

2. The air conditioner outdoor unit according to claim 1, wherein: The maximum width of the radial ribs is set at a radius of 60%-80% away from the center of the grille.

3. The air conditioner outdoor unit according to claim 2, wherein: Along the radial direction from the center to the outer periphery of the grille, the width of the radial ribs along the air outlet direction first decreases, then increases, and then decreases.

4. The air conditioner outdoor unit according to claim 1, wherein: The maximum width of the radial ribs is set at the maximum wind speed position of the outdoor unit.

5. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: The radial rib has an outlet profile and an inlet profile. The radial rib takes the outlet profile as a starting position and twists in a direction opposite to a rotation direction of the fan.

6. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: In the radial direction from the center to the outer periphery of the grille, the radial ribs include radial rib section one, radial rib section two and radial rib section three; The radial ribs have an outlet profile, and the coordinate value of the outlet profile on the first section of the radial rib along the air outlet direction first decreases and then increases along the radial direction from the center of the grille to the periphery, the coordinate value of the outlet profile on the second section of the radial rib along the air outlet direction increases along the radial direction from the center of the grille to the periphery, and the coordinate value of the outlet profile on the third section of the radial rib along the air outlet direction decreases along the radial direction from the center of the grille to the periphery.

7. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: In the radial direction from the center to the outer periphery of the grille, the radial ribs include radial rib section one, radial rib section two and radial rib section three; The radial ribs have an inlet profile, and the coordinate value of the inlet profile on the first section of the radial rib along the air outlet direction first increases and then decreases along the radial direction from the center of the grille to the periphery, the coordinate value of the inlet profile on the second section of the radial rib along the air outlet direction decreases along the radial direction from the center of the grille to the periphery, and the coordinate value of the inlet profile on the third section of the radial rib along the air outlet direction first increases and then decreases along the radial direction from the center of the grille to the periphery.

8. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: In the radial direction from the center to the outer periphery of the grille, the radial ribs include radial rib section one, radial rib section two and radial rib section three; The width variation trends of the first radial rib section, the second radial rib section, and the third radial rib section are different.

9. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: In the radial direction from the center to the outer periphery of the grille, the radial ribs include radial rib section one, radial rib section two and radial rib section three; The radial ribs define a plurality of control surfaces, wherein the plurality of control surfaces are sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, and the central axis of the cylinder coincides with the center of the grille; The radial rib has an outlet profile and an inlet profile, a first intersection is formed between the outlet profile and the control surface, a second intersection is formed between the inlet profile and the control surface, the center of the annular surface formed on the wind inlet side of the outer frame of the grille is used as the coordinate origin, the line connecting the first intersection and the coordinate origin is the first line, the line connecting the second intersection and the coordinate origin is the second line, and the angle between the first line and the second line is the wrap angle of the radial rib; Along the radial direction from the center to the periphery of the grille, the wrap angle on the first section of the radial rib increases first and then decreases, the wrap angle on the second section of the radial rib gradually decreases, and the wrap angle on the third section of the radial rib gradually increases.

10. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: In the radial direction from the center to the outer periphery of the grille, the radial ribs include radial rib section one, radial rib section two and radial rib section three; The radial ribs define a plurality of control surfaces, wherein the plurality of control surfaces are sections formed by cutting the radial ribs along the air outlet direction through cylinders of different radii, and the central axis of the cylinder coincides with the center of the grille; The direction from the center of the grille to the outer periphery is the X-axis, the radial rib has an outlet profile, a first intersection is provided between the outlet profile and the control surface, the center of the annular surface formed on the wind inlet side of the outer frame of the grille is used as the coordinate origin, and the angle between the line connecting the first intersection and the coordinate origin and the X-axis is the forward bending angle of the radial rib; in the radial direction from the center of the grille to the outer periphery, the forward bending angle on one section of the radial rib first decreases and then increases, the forward bending angle on the second section of the radial rib increases, and the forward bending angle on the third section of the radial rib increases.

11. The air conditioner outdoor unit according to any one of claims 1 to 4, wherein: In the radial direction from the center to the outer periphery of the grille, the radial ribs include radial rib section one, radial rib section two and radial rib section three; The radial ribs have an outlet profile and an inlet profile. In the radial direction from the center to the periphery of the grille, the coordinate values ​​of the outlet profile and the inlet profile on the first section of the radial rib along the air outlet direction increase, the coordinate values ​​of the outlet profile and the inlet profile on the second section of the radial rib along the air outlet direction first increase and then decrease, and the coordinate values ​​of the outlet profile and the inlet profile on the third section of the radial rib along the air outlet direction decrease.

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