Airflow deflector, fan assembly and air conditioner

Abstract

This invention provides a flow guide grille, a fan assembly, and an air conditioner, including a support structure, a grille structure, and a flow guide component. The grille structure is disposed on the support structure. The flow guide component is rotatably disposed on the support structure to change its flow direction. The flow guide component in this application can be combined with the support structure and can rotate relative to the support structure, allowing its flow direction to match the airflow direction generated by the fan. This enables the flow guide component to better conform to the airflow, thereby reducing noise when the airflow passes through the flow guide grille. Simultaneously, the pressure difference across the flow guide component reduces aerodynamic noise generated when the airflow passes through the flow guide grille, improving the comfort of the air conditioner. Furthermore, the flow guide component can also work with the grille structure to improve the fan's air outlet pattern, correcting the airflow direction of the fan assembly without changing the fan itself, effectively reducing backflow.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a flow guide grille, a fan assembly, and an air conditioner. Background Technology

[0002] As living standards improve, people's demands for building comfort are increasing, leading to stricter requirements for air conditioning performance and noise levels. As a key component of air conditioning systems, the performance and noise level of the fan unit significantly impact the overall performance and noise levels of the system.

[0003] The fan assembly mainly consists of a fan, guide ring, motor, and grille. The noise generated during operation is not solely from the fan itself; the motor and the airflow passing through the grille also produce noise. While there are relatively mature systems for controlling noise from the fan and motor, there is still a lack of effective control methods for the additional aerodynamic noise generated by the airflow passing through the grille. Besides noise issues, air conditioning systems can also experience backflow due to the fan's airflow dissipation, causing hot air blown out of the air conditioning vents to be drawn back, a problem for fans already designed and in use. Summary of the Invention

[0004] Therefore, it is necessary to provide a guide grille, a fan assembly, and an air conditioner to address the problems in the operation of existing fan components, where airflow passing through the grille generates additional aerodynamic noise, which is more pronounced at high wind speeds, and where some fans exhibit backflow due to design flaws.

[0005] The technical solution is as follows:

[0006] In a first aspect, a flow guide grille is provided, comprising:

[0007] Support structure;

[0008] A grid structure, wherein the grid structure is disposed on the supporting structure; and

[0009] A flow guide is rotatably mounted on the support structure to change the flow direction of the flow guide.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the support structure includes a connector and at least one support member, each of the support members being connected to the connector and spaced apart along the circumferential direction of the connector, and each of the support members being rotatably provided with the flow guide.

[0012] In one embodiment, the guide member has a mounting through hole extending along the axial direction of the support member, the support member passes through the mounting through hole and is rotatably engaged with the mounting through hole.

[0013] In one embodiment, the flow guide grille further includes a limiting member, which is used to limit the flow guide and the support member when the flow guide rotates about the axis of the support member to a preset angle.

[0014] In one embodiment, the limiting member is configured as a gear, which is mounted on the guide member. The gear has at least two internal teeth, and the outer side wall of the support member has at least two tooth grooves. Each tooth groove is arranged along the circumferential direction of the support member, and each gear meshes with each tooth groove.

[0015] In one embodiment, the flow guide is configured as a flow guide blade, and the twist angle of the flow guide blade gradually increases along the axis of the support and away from the connector.

[0016] In one embodiment, the cross-section of the guide vane along a direction perpendicular to the axis of the support includes a pressure-side profile and a suction-side profile disposed opposite to each other, and the pressure-side profile is fitted to a function as follows:

[0017] y1 = a1x1 + a2x1 2 +a3x1 3 +a4x1 4 +a5x1 5 +z1

[0018] Wherein, a1=1.63571±0.0192, a2=-0.49822±0.00804, a3=0.0728±0.00143, a4=-0.00508±0.000113502, a5=0.000131657±0.00000328713, z1=1.85421±0.01475;

[0019] The function for fitting the suction side profile is:

[0020] y2=b1x2+b2x2 2 +b3x2 3 +z2

[0021] Wherein, b1=0.72838±0.0009.27192, b2=-0.0601±0.0001.39718, b3=0.00102±0.00000631446, z2=0.31368±0.00178.

[0022] In one embodiment, the grille structure includes at least one annular grille, each annular grille being spaced apart on the outside of the connector along the axial direction of the support member, and an air outlet unit being formed between the connector and the annular grille, and between two adjacent annular grilles. The number of guide members on each support member is the same as the number of air outlet units, and each guide member on each support member is correspondingly installed in each air outlet unit.

[0023] In one embodiment, the annular grille includes at least two grille units. Each grille unit has a first end face, a second end face, an arc surface, and an inclined surface. The first end face and the second end face are spaced apart and connected to the second end face of the adjacent grille unit. The arc surface is located between the first end face and the second end face and is connected to both the first end face and the second end face. The inclined surface is located between the first end face and the second end face and is connected to the arc surface, the first end face, and the second end face. The inclination direction of the inclined surface is adapted to the direction of airflow when it contacts the inclined surface.

[0024] In one embodiment, the inclined surface, the arc surface, and the first end face are connected at a point. The contour of the first end face includes a semi-elliptical line, a first curve, and a second curve. The two ends of the semi-elliptical line are respectively connected to one end of the first curve and one end of the second curve. The other end of the first curve is connected to the other end of the second curve. The first curve and the second curve are symmetrically arranged about the central axis of the first end face. The function fitted to the first curve is:

[0025] y3=c1x3+c2x3 2 +c3x3 3 +z3

[0026] Wherein, c1=9.80215±0.54737, c2=-4.86042±0.56007, c3=0.91923±0.15104, z3=4.54069±0.11755.

[0027] Secondly, a fan assembly is provided, including a fan, a guide ring, and the guide grille, wherein the guide ring is disposed on the side of the fan where the air outlet is located, and the guide grille is installed on the guide ring.

[0028] Thirdly, an air conditioner is provided, including the aforementioned fan assembly.

[0029] In the above embodiments, the air guide grille, fan assembly, and air conditioner, during use, integrate the air guide component with the support structure and can rotate relative to the support structure. This allows the air guide component's guiding direction to match the airflow direction generated by the fan, enabling the air guide component to better conform to the airflow and thus reduce noise when the airflow passes through the air guide grille. Simultaneously, the pressure difference across the airflow through the air guide component improves the fan's outlet direction and reduces aerodynamic noise generated when the airflow passes through the air guide grille, enhancing the comfort of the air conditioner. Furthermore, the air guide component can also work with the grille structure to improve the fan's outlet pattern, correcting the fan assembly's airflow direction without altering the fan itself, effectively reducing backflow. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a flow guide grille according to one embodiment.

[0033] Figure 2 for Figure 1 A schematic diagram of the supporting and guiding components.

[0034] Figure 3 for Figure 2 A partial structural diagram of the support and guide components.

[0035] Figure 4 for Figure 3 Cross-sectional view of the central guide component.

[0036] Figure 5 for Figure 1 A schematic diagram of the grid structure in the image.

[0037] Figure 6 for Figure 5 A schematic diagram of the grid unit in the diagram.

[0038] Figure 7 for Figure 6 The grid unit in the front view.

[0039] Figure 8 for Figure 6 The grid unit in the side view.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Airflow guide grille; 100. Support structure; 110. Connector; 120. Support component; 121. Connecting part; 200. Grille structure; 210. Annular grille; 211. Grille unit; 212. First end face; 2121. Semi-elliptical line; 2122. First curve; 2123. Second curve; 213. Second end face; 214. Arc surface; 215. Inclined surface; 220. Air outlet unit; 300. Airflow guide component; 310. Mounting through hole; 321. Pressure side profile; 322. Suction side profile; 323. First connecting line; 324. Second connecting line; 400. Limiting component. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] In one embodiment, a fan assembly is provided, including a fan, a guide ring, and a guide grille 10. The guide ring is disposed on the side of the fan where the air outlet is located, and the guide grille 10 is mounted on the guide ring. Thus, the guide grille 10 can guide the airflow generated by the fan, allowing the airflow to flow out in a specified direction, improving the practicality of the fan assembly.

[0044] In this specific embodiment, the fan assembly can be configured as an axial flow fan assembly.

[0045] In one embodiment, a flow guide grille 10 is provided, including a support structure 100, a grille structure 200, and a flow guide member 300. The grille structure 200 is disposed on the support structure 100. The flow guide member 300 is rotatably disposed on the support structure 100 to change the flow direction of the flow guide member 300.

[0046] In the above embodiment, the guide grille 10, when in use, the guide member 300 is combined with the support structure 100 and can rotate relative to the support member 120, so that the guiding direction of the guide member 300 is adapted to the airflow direction generated by the fan, thereby allowing the guide member 300 to better conform to the airflow, thus reducing the noise when the airflow passes through the guide grille 10. At the same time, the pressure difference between the two sides of the airflow passing through the guide member 300 improves the airflow direction of the fan and reduces the aerodynamic noise generated when the airflow passes through the guide grille 10, improving the comfort of the fan assembly. In addition, the guide member 300 can also cooperate with the grille structure 200 to improve the airflow pattern of the fan, correcting the wind speed direction of the fan assembly without changing the fan itself, effectively improving the backflow phenomenon.

[0047] like Figure 1 and Figure 2 As shown, the support structure 100 further includes a connector 110 and at least one support member 120. Each support member 120 is connected to the connector 110 and is spaced apart along the circumferential direction of the connector 110. Each support member 120 is rotatably provided with a guide member 300. In this way, the connector 110 and the multiple support members 120 can cooperate to form an umbrella-shaped structure to facilitate the installation of the grid structure 200 and the guide member 300.

[0048] Optionally, the connector 110 is configured as a connecting block, and the support 120 is configured as a support rod, with twelve support rods in total. One end of each support rod is connected to the outer wall of the connecting block, and the included angle between any two adjacent support rods is 30°. The other end of each support rod is provided with a connecting part 121, which is used to connect with the guide ring. Specifically, in this embodiment, the connecting part 121 can be configured as a connecting ring, which is installed on the guide ring by bolt fixing.

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, optionally, the flow guide 300 is provided with a mounting through hole 310 extending along the axial direction of the support member 120. The support member 120 passes through the mounting through hole 310 and is rotatably engaged with the mounting through hole 310. In this way, the support member 120 can be hidden inside the flow guide 300, reducing the contact area between the support structure 100 and the airflow, while also further strengthening the strength of the flow guide grille 10. This ensures that none of the components in the flow guide grille 10 will move relative to the flow guide ring during operation, thereby ensuring the stability and reliability of the airflow direction of the flow guide grille 10 and improving the reliability of the fan assembly.

[0050] like Figure 1 and Figure 3As shown, in one embodiment, the airflow guide grille 10 further includes a limiting member 400. When the airflow guide 300 rotates around the axis of the support member 120 to a preset angle, the limiting member 400 is used to limit the airflow guide 300 and the support member 120 in a limiting engagement. In this way, the limiting member 400 can connect the airflow guide 300 and the support member 120 as a whole, ensuring that the airflow guide 300 will not rotate relative to the support member 120 during operation, thereby ensuring the stability and reliability of the airflow direction of the airflow guide grille 10.

[0051] The limiting component 400 can be a limiting block, a limiting ring, a limiting sleeve, a limiting clamp, or other limiting structures.

[0052] like Figure 1 and Figure 3 As shown, optionally, the limiting member 400 is a gear, which is installed on the guide member 300. The gear has at least two internal teeth, and the outer side wall of the support member 120 has at least two tooth grooves. Each tooth groove is arranged along the circumferential direction of the support member 120, and each gear meshes with each tooth groove.

[0053] Specifically, in this embodiment, the outer wall of the support member 120 is provided with a total of sixty toothed grooves, each toothed groove having a 6° offset. The gear is fixed to the inner wall of the mounting through hole 310 and is provided with sixty internal teeth. In this way, by changing the meshing position of the internal teeth and the toothed grooves, the installation angle of the guide member 300 can be quickly and accurately adjusted to match different types of fans and to improve the air outlet direction of the fan as needed.

[0054] In one embodiment, the guide element 300 is configured as a guide vane, positioned along the axis of the support 120 and away from the connector 110 (e.g., Figure 1 As shown in direction A), the twist angle of the guide vanes gradually increases. Thus, due to the airflow speed generated by the fan, the airflow speed increases step by step from the hub to the blade tip, and the airflow vortex also increases accordingly. By setting the twist angle on the guide vanes to gradually increase along the axis of the support member 120 and away from the connector 110, the guide vanes can better conform to the airflow, thereby producing better noise reduction and airflow guiding effects.

[0055] The twist angle refers to the angle of torsion deformation of the wind turbine blades during operation due to wind force. Specifically, in this embodiment, based on the wind speed distribution pattern of the wind turbine, each guide vane is equipped with a 4° twist angle. This 4° twist angle means that, along the axial direction of the support member 120, there is a 4° offset angle between the two opposite sides of the guide vane. Furthermore, the relative positions of different guide vanes on the same support member 120 can be flexibly adjusted according to actual usage requirements.

[0056] The guide vanes can be modeled based on biomimicry. Owls possess the ability to fly silently while gliding to hunt, which is largely due to their unique airfoil. Therefore, the guide vanes in this application adopt an owl-shaped airfoil structure. The owl-shaped airfoil structure can guide airflow by altering the pressure difference between the upper and lower sections of the guide vane, causing the airflow to move towards the lower pressure area.

[0057] Optionally, the cross-section of the guide vane along the direction perpendicular to the axis of the support 120 adopts an owl-wing-extended 40% airfoil. In this way, a low-pressure zone appears at the leading edge of the guide vane, changing the pressure pulsation on the surface of the guide vane, thereby affecting the sound pressure and improving the additional noise generated by the airflow impacting the guide grille 10.

[0058] The method for extracting the owl wing airfoil structure involves reverse modeling of the owl wing through reverse reconstruction engineering, extracting coordinate points of cross-sections with different span-to-width ratios, and then smoothing them using a fitting function. The fitting method employs polynomial fitting, with the extracted coordinate points as the output. Specifically, in this embodiment, a fifth-order polynomial is used for fitting the pressure-side profile 321, and a cubic polynomial is used for fitting the suction-side profile 322.

[0059] like Figure 4 As shown, optionally, the cross-section of the guide vane along the direction perpendicular to the axis of the support 120 includes a pressure-side profile 321 and a suction-side profile 322 arranged opposite to each other, and the pressure-side profile 321 is fitted to a function as follows:

[0060] y1 = a1x1 + a2x1 2 +a3x1 3 +a4x1 4 +a5x1 5 +z1

[0061] Wherein, a1=1.63571±0.0192, a2=-0.49822±0.00804, a3=0.0728±0.00143, a4=-0.00508±0.000113502, a5=0.000131657±0.00000328713, z1=1.85421±0.01475;

[0062] The fitting function for the suction side profile 322 is:

[0063] y2=b1x2+b2x2 2 +b3x2 3 +z2

[0064] Wherein, b1=0.72838±0.0009.27192, b2=-0.0601±0.0001.39718, b3=0.00102±0.00000631446, z2=0.31368±0.00178.

[0065] like Figure 4 As shown, in this specific embodiment, the cross section of the guide vane along the direction perpendicular to the axis of the support member 120 further includes a first connecting line 323 and a second connecting line 324. The two ends of the first connecting line 323 are respectively connected to one end of the pressure-side profile 321 and one end of the suction-side profile 322, and the two ends of the second connecting line 324 are respectively connected to the other end of the pressure-side profile 321 and the other end of the suction-side profile 322.

[0066] like Figure 1 and Figure 5 As shown, in one embodiment, the grille structure 200 includes at least one annular grille 210. Each annular grille 210 is spaced apart and sleeved on the outside of the connector 110 along the axial direction of the support member 120. Air outlet units 220 are formed between the connector 110 and the annular grilles 210, and between adjacent annular grilles 210. The number of guide members 300 on each support member 120 is the same as the number of air outlet units 220, and each guide member 300 on each support member 120 is correspondingly installed within each air outlet unit 220. Thus, the grille structure 200, in conjunction with the guide members 300, can divide the airflow into multiple streams and guide each stream separately, reducing the probability of collision between adjacent airflow streams, ensuring that the fan's airflow can be output at a preset wind speed and in a preset direction, and improving the reliability of the fan assembly.

[0067] like Figure 1 As shown, specifically in this embodiment, the two opposite ends of the guide member 300 are connected to two adjacent annular grilles 210 respectively. According to the wind speed distribution in the fan plane, with the axial dimension of the support member 120 as the length, the grille structure 200 includes ten annular grilles 210 with different diameters. The connector 110, the ten annular grilles 210, and the guide ring are combined to form eleven air outlet units 220.

[0068] like Figure 5 and Figure 6As shown, the annular grille 210 further includes at least two grille units 211. Each grille unit 211 has a first end face 212, a second end face 213, an arc surface 214, and an inclined surface 215. The first end face 212 and the second end face 213 are spaced apart and connected to the second end face 213 of the adjacent grille unit 211. The arc surface 214 is located between the first end face 212 and the second end face 213 and is connected to both the first end face 212 and the second end face 213. The inclined surface 215 is located between the first end face 212 and the second end face 213 and is connected to both the arc surface 214 and the first end face 212 and the second end face 213. The inclination direction of the inclined surface 215 is adapted to the direction of airflow when it contacts the inclined surface 215. Thus, the grille unit 211 can be configured as a teardrop-shaped sawtooth structure unit. The teardrop-shaped sawtooth structure contacts both the support rod and the guide vanes to form support, collectively constituting the main body of the grille. Specifically, the annular grille is configured as an annular teardrop-shaped sawtooth grille. This annular teardrop-shaped sawtooth grille can couple with the guide vanes to reduce aerodynamic noise caused by airflow impacting the guide grille 10. Additionally, the arc surface 214 is the windward surface of the grille unit 211 (i.e., the surface where the airflow generated by the fan first contacts the grille unit 211), which can reduce the resistance of the guide grille 10. Furthermore, the inclination direction of the inclined surface 215 matches the direction of airflow contact with the inclined surface 215, allowing the inclined surface 215 to better conform to the airflow, further reducing aerodynamic noise caused by airflow impacting the guide grille 10.

[0069] like Figure 6 As shown, specifically in this embodiment, the annular grille 210 has a teardrop-shaped structure at one end with an arc surface 214, and an asymmetrical sawtooth structure at the other end with an inclined surface 215. The grille unit 211 can be obtained by stretching the first end face 212 along its normal direction and then cutting it obliquely.

[0070] like Figure 6 , Figure 7 and Figure 8 As shown, optionally, the inclined surface 215, the arc surface 214, and the first end face 212 are connected to a single point. The outline of the first end face 212 includes a semi-elliptical line 2121, a first curve 2122, and a second curve 2123. The two ends of the semi-elliptical line 2121 are respectively connected to one end of the first curve 2122 and one end of the second curve 2123. The other end of the first curve 2122 is connected to the other end of the second curve 2123. The first curve 2122 and the second curve 2123 are symmetrically arranged about the central axis of the first end face 212. The function fitted to the first curve 2122 is:

[0071] y3=c1x3+c2x3 2 +c3x3 3 +z3

[0072] Wherein, c1=9.80215±0.54737, c2=-4.86042±0.56007, c3=0.91923±0.15104, z3=4.54069±0.11755.

[0073] like Figure 7 and Figure 8 As shown, α is the included angle of the asymmetric sawtooth structure, d is the width of the asymmetric sawtooth structure, L1 is the height of the grid unit 211, R1 is the minor axis radius of the teardrop-shaped structure, and R2 is the major axis radius of the teardrop-shaped structure. The control parameters for the semi-elliptical line are the minor axis radius R1 and the major axis radius R2. The first curve 2122 and the second curve 2123 are obtained by designing coordinates and taking points on the front view of the grid unit 211, and then by polynomial fitting. The control parameters for the asymmetric sawtooth structure are the included angle α and the width d of the asymmetric sawtooth structure, and each control parameter changes according to the wind speed at the location of the ring-shaped grid.

[0074] In this specific embodiment, the settings of each control parameter were analyzed using orthogonal experiments. The noise level at the rated speed of the fan was used as the evaluation index to determine the optimal parameters. The results of the optimal parameters are shown in the table below:

[0075] 1 30° 0.013R 0.03R 0.012R 0.022R 2 30° 0.0125R 0.03R 0.01R 0.022R 3 30° 0.012R 0.03R 0.0098R 0.022R 4 45° 0.0115R 0.03R 0.0096R 0.022R 5 45° 0.011R 0.03R 0.0094R 0.022R 6 45° 0.0105R 0.03R 0.0092R 0.022R 7 60° 0.01R 0.03R 0.009R 0.022R 8 60° 0.0095R 0.03R 0.0088R 0.022R 9 60° 0.009R 0.03R 0.0086R 0.022R 10 60° 0.0085R 0.03R 0.0084R 0.022R

[0076] Where R is the radius of the flow guide grille 10, and the error range of the control parameter is controlled within ±0.002R.

[0077] To verify the effect of the flow guide grille 10 in this application, fluid simulation analysis was performed using an axial flow fan from a commercial air conditioning unit. Actual airflow tests on this fan revealed severe air dispersion, a phenomenon confirmed by the simulation results. After installing the flow guide grille 10, the air dispersion of the fan was significantly improved, and the recirculation zone at the center of the fan hub was significantly reduced or even disappeared, indicating that the flow guide grille 10 in this application has a significant airflow guiding effect.

[0078] In addition, the airflow guide grille 10 was modeled and manufactured using 3D printing, and then installed into the wind turbine assembly for comparative testing. The test results are shown below:

[0079]

[0080] According to the test results, under the design speed of 1020 rpm, the guide grille 10 in this application does not affect the air volume and power of the fan assembly, and the noise is reduced by 0.4 dB, indicating that the guide grille 10 in this application has a noise reduction effect.

[0081] The fan assembly can be used in air conditioners, heat dissipation equipment, or other products. This application uses the application of the fan assembly in an air conditioner as an example for illustration, and should not be construed as limiting this application.

[0082] In one embodiment, an air conditioner is provided, including the fan assembly of any of the above embodiments.

[0083] In the air conditioner described in the above embodiment, the air guide 300 is integrated with the support structure 100 and can rotate relative to the support 120, allowing the air guide direction of the air guide 300 to match the airflow direction generated by the fan. This enables the air guide 300 to better conform to the airflow, thereby reducing noise when the airflow passes through the air guide grille 10. Simultaneously, the pressure difference across the airflow over the air guide 300 improves the fan's outlet direction and reduces aerodynamic noise generated when the airflow passes through the air guide grille 10, enhancing the comfort of the air conditioner. Furthermore, the air guide 300 can also work with the grille structure 200 to improve the fan's outlet pattern, correcting the wind speed direction of the fan assembly without altering the fan itself, effectively reducing backflow.

[0084] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0085] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0087] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0088] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0089] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A flow guide grille, characterized in that, include: Support structure (100); A grid structure (200) is disposed on the support structure (100); and A flow guide (300) is rotatably mounted on the support structure (100) to change the flow direction of the flow guide (300); The support structure (100) includes a connector (110) and at least one support member (120). Each support member (120) is connected to the connector (110) and is spaced apart along the circumferential direction of the connector (110). Each support member (120) can be rotatably provided with the guide member (300). The grille structure (200) includes at least one annular grille (210). Each annular grille (210) is spaced apart on the outside of the connector (110) along the axial direction of the support member (120). An air outlet unit (220) is formed between the connector (110) and the annular grille (210), and between two adjacent annular grilles (210). The number of guide members (300) on each support member (120) is the same as the number of air outlet units (220), and each guide member (300) on each support member (120) is correspondingly installed in each air outlet unit (220).

2. The flow guide grille according to claim 1, characterized in that, The guide member (300) is provided with a mounting through hole (310) extending along the axial direction of the support member (120). The support member (120) passes through the mounting through hole (310) and rotates with the mounting through hole (310).

3. The flow guide grille according to claim 1, characterized in that, The flow guide grille (10) also includes a limiting member (400). When the flow guide (300) rotates around the axis of the support member (120) to a preset angle, the limiting member (400) is used to limit the flow guide (300) and the support member (120) to cooperate.

4. The flow guide grille according to claim 3, characterized in that, The limiting member (400) is configured as a gear, which is installed on the guide member (300). The gear has at least two internal teeth, and the outer side wall of the support member (120) has at least two tooth grooves. Each tooth groove is arranged along the circumferential direction of the support member (120), and each gear meshes with each tooth groove.

5. The flow guide grille according to claim 1, characterized in that, The guide member (300) is configured as a guide vane, and the twist angle of the guide vane gradually increases along the axis of the support member (120) and away from the connector (110).

6. The flow guide grille according to claim 5, characterized in that, The cross-section of the guide vane along the direction perpendicular to the axis of the support (120) includes a pressure-side profile (321) and a suction-side profile (322) arranged opposite to each other. The pressure-side profile (321) is fitted to a function as follows: y1=a1x1+a2x1 2 +a3x1 3 +a4x1 4 +a5x1 5 +z1 Wherein, a1=1.63571±0.0192, a2=-0.49822±0.00804, a3=0.0728±0.00143, a4=-0.00508±0.000113502, a5=0.000131657±0.00000328713, z1=1.85421±0.01475; The suction side profile (322) is fitted to the following function: y2=b1x2+b2x2 2 +b3x2 3 +z2 Wherein, b1=0.72838±0.0009.27192, b2=-0.0601±0.0001.39718, b3=0.00102±0.00000631446, z2=0.31368±0.00178.

7. The flow guide grille according to any one of claims 1 to 6, characterized in that, The annular grille (210) includes at least two grille units (211). Each grille unit (211) has a first end face (212), a second end face (213), an arc surface (214), and an inclined surface (215). The first end face (212) and the second end face (213) are spaced apart and connected to the second end face (213) of the adjacent grille unit (211). The arc surface (214) is located between the first end face (212) and the second end face (213) and is connected to both the first end face (212) and the second end face (213). The inclined surface (215) is located between the first end face (212) and the second end face (213) and is connected to the arc surface (214), the first end face (212), and the second end face (213). The inclination direction of the inclined surface (215) is adapted to the direction of airflow when it contacts the inclined surface (215).

8. The flow guide grille according to claim 7, characterized in that, The inclined surface (215), the arc surface (214), and the first end face (212) are connected at a point. The outline of the first end face (212) includes a semi-elliptical line (2121), a first curve (2122), and a second curve (2123). The two ends of the semi-elliptical line (2121) are respectively connected to one end of the first curve (2122) and one end of the second curve (2123). The other end of the first curve (2122) is connected to the other end of the second curve (2123). The first curve (2122) and the second curve (2123) are symmetrically arranged about the central axis of the first end face (212). The first curve (2122) is fitted to a function as follows: y3 = c1x3 + c2x3 2 +c3x3 3 +z3 Wherein, c1=9.80215±0.54737, c2=-4.86042±0.56007, c3=0.91923±0.15104, z3=4.54069±0.11755.

9. A fan assembly, characterized in that, It includes a fan, a guide ring, and a guide grille (10) as described in any one of claims 1 to 8, wherein the guide ring is disposed on the side of the fan where the air outlet is located, and the guide grille (10) is mounted on the guide ring.

10. An air conditioner, characterized in that, Includes the wind turbine assembly as described in claim 9.

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