Blade and grid assembly

Abstract

A kind of blade and grille assembly comprising the blade, when being applied to the wall body close to air conditioning outdoor unit, it helps to inhibit the air flow that air conditioning outdoor unit blows is short-circuited after flowing through blade again by air conditioning outdoor unit suction airflow phenomenon.The blade of the present application includes air inlet section and air outlet section, in the profile line of the section of the blade in the direction orthogonal to length direction, the air inlet section is connected by multiple curves and forms, wherein, in the profile line, the intersection of the line (X) of the two points of the maximum distance forms air inlet section endpoint (B), it is assumed that the maximum distance of the part in the profile line on the side of the line to the line (X) is L1 and it is assumed that the maximum distance of the part in the profile line on the other side of the line to the line (X) is L2, satisfy the following relationship: L1>L2.

Description

Technical Field

[0001] The present invention relates to blades and grid assemblies including the blades. Background Technology

[0002] In the past, air conditioner outdoor units were often installed on support brackets on the exterior walls of buildings.

[0003] In recent years, in order to ensure the safety of air conditioner installation, outdoor air conditioner units sometimes need to be installed in the reserved space of the building.

[0004] In the above situation, in order to ensure the overall aesthetics of the building, louvers can be installed on the exterior wall of the building near the outdoor air conditioning unit to hide the outdoor air conditioning unit.

[0005] However, in practice, it has been found that when the outdoor unit of the air conditioner is installed in the reserved space of the building, the airflow blown out by the outdoor unit is prone to short-circuiting when it passes through the blades of the louvers, thus affecting the ventilation and heat dissipation of the outdoor unit. Summary of the Invention

[0006] The present invention was made in view of the above-mentioned problems, and its purpose is to provide a blade and a grille assembly including the blade, which, when applied to a wall near an outdoor unit of an air conditioner, helps to suppress the airflow short-circuiting phenomenon where the airflow blown out by the outdoor unit of the air conditioner is drawn back by the outdoor unit of the air conditioner after passing through the blade.

[0007] To achieve the above objectives, the present invention provides a blade comprising an inlet section and an outlet section. In the profile of the cross section of the blade in a direction orthogonal to the length direction, the inlet section is formed by connecting multiple curved segments. In the profile, the intersection of the line connecting the two points with the largest distance with the inlet section constitutes the endpoint of the inlet section. When the maximum distance from the first part of the profile located on one side of the connecting line to the connecting line is L1, and the maximum distance from the second part of the profile located on the other side of the connecting line to the connecting line is L2, the following relationship is satisfied: L1 > L2.

[0008] According to the blade of the present invention, the air inlet section is formed by connecting multiple curved segments, which helps to guide the airflow, reduce pressure loss, and allow the airflow to be blown further, thereby reducing the possibility of airflow short-circuiting. Furthermore, on the air inlet section side, the upper surface (or lower surface) is raised, while the lower surface (or upper surface) is relatively flat. Therefore, the airflow flowing along the upper surface of the blade and the airflow flowing along the lower surface of the blade can be quickly separated, which can further reduce pressure loss and allow the airflow to flow smoothly along the surface of the blade, thereby further reducing the possibility of airflow short-circuiting.

[0009] Furthermore, in the blade of the present invention, it is preferable that a point of abrupt curvature change exists in the profile at a location on the other side of the line connecting the air inlet section to the end of the air inlet section.

[0010] According to the blade of the present invention, in the profile, there is a point of abrupt curvature change on the side of the air inlet section that is closer to the end of the air inlet section than the line connecting the two sides. Therefore, the airflow flowing along the upper surface of the blade and the airflow flowing along the lower surface of the blade can be quickly separated, and the airflow can be easily guided to flow along the upper and lower surfaces of the blade, so that the airflow can be blown further and short-circuiting can be prevented.

[0011] Furthermore, in the blade of the present invention, preferably, the highest point of the first portion of the profile line that is at the greatest distance from the connecting line is closer to the end point of the air inlet section than the lowest point of the second portion of the profile line that is at the greatest distance from the connecting line in the direction of extension of the connecting line.

[0012] According to the blade of the present invention, the highest point of the first part of the profile line with the greatest distance to the connecting line is closer to the end point of the air inlet section in the direction of extension of the connecting line than the lowest point of the second part of the profile line with the greatest distance to the connecting line. Therefore, it is easier to guide the airflow along the lower (or upper) surface of the blade. Furthermore, the airflow flowing through the upper (or lower) surface of the blade is more likely to form a situation of dense streamlines, low pressure and high velocity, which helps the airflow to blow further and prevent short circuits. On the other hand, the airflow flowing through the lower (or upper) surface of the blade can also be more stable and faster.

[0013] Furthermore, in the blade of the present invention, preferably, the highest point of the first portion of the profile line that is the furthest from the connecting line is closer to the end point of the air inlet section than the lowest point of the second portion of the profile line that is the furthest from the connecting line in the direction of extension of the connecting line, and the curvature abrupt point and the lowest point are smoothly connected by a curve.

[0014] According to the blade of the present invention, the highest point of the first part of the profile line with the greatest distance to the connecting line is closer to the end point of the air inlet section in the direction of extension of the connecting line than the lowest point of the second part of the profile line with the greatest distance to the connecting line. Therefore, it is easier to guide the airflow along the lower (or upper) surface of the blade. Furthermore, the airflow flowing through the upper (or lower) surface of the blade is more likely to form a situation of dense streamlines, low pressure, and high velocity, which helps the airflow to be blown further and prevents short circuits. On the other hand, the airflow flowing through the lower (or upper) surface of the blade can also be more stable and faster. Moreover, the curvature change point and the lowest point are smoothly connected by a curve, which helps to increase the airflow velocity on the lower (or upper) surface of the blade, so that the airflow can be blown further and further reduces the possibility of airflow short circuits.

[0015] Furthermore, in the blade of the present invention, the blade preferably further includes a connecting section that connects the air inlet section and the air outlet section, and in the outline, the connecting section is composed of at least a curve among curves and straight lines.

[0016] According to the blade of the present invention, the blade further includes a connecting section that connects the air inlet section and the air outlet section. In the profile, the connecting section is composed of at least a curve among curves and straight lines. Therefore, it helps to increase the airflow velocity through the connecting section, so that the airflow can be blown further and further reduce the possibility of airflow short-circuiting.

[0017] Furthermore, in the blade of the present invention, preferably the first and second portions of the air outlet section side of the outline are both straight lines, and the intersection of the connecting line (X) and the air outlet section constitutes the air outlet section endpoint (C). Let the thickness of the blade at the first point on the air inlet section side of the connecting line be T1, and let the thickness of the blade at the second point on the air outlet section side of the connecting line be T2. When the distance between the air inlet section endpoint and the first point is equal to the distance between the air outlet section endpoint and the second point, the following relationship is satisfied: T1 > T2.

[0018] According to the blade of the present invention, the first and second parts of the air outlet section of the profile are both straight lines. Let the thickness of the blade at the first point on the air inlet section side of the connecting line be T1, and let the thickness of the blade at the second point on the air outlet section side of the connecting line be T2. When the distance between the end point of the air inlet section and the first point is equal to the distance between the end point of the air outlet section and the second point, the following relationship is satisfied: T1 > T2, that is, the blade is formed into a shape with a large head and a small tail. The head helps to reduce airflow resistance, and the tail helps the airflow to diffuse quickly. Therefore, it can reduce obstruction, reduce pressure loss, facilitate the rapid flow of airflow, and further reduce the possibility of airflow short circuit.

[0019] In addition, to achieve the above objectives, the present invention provides a grid assembly including a frame, wherein a plurality of the above-mentioned blades are arranged in the frame in a manner that is arranged along the height direction of the frame, wherein at least some of the blades are configured such that the angle between the extension direction of the connecting line and the thickness direction of the frame is less than 30 degrees.

[0020] The grille assembly according to the present invention includes a frame, in which a plurality of the aforementioned blades are arranged in a manner along the height direction of the frame, wherein at least some of the blades are configured such that the angle between the extension direction of the connecting line and the thickness direction of the frame is less than 70 degrees. Therefore, the blades can be used to guide the airflow so that the blown airflow flows in a near-horizontal direction to suppress airflow short-circuiting, and the blades can also be used for shielding to improve aesthetics.

[0021] Furthermore, in the grille assembly of the present invention, preferably at least some of the blades are configured such that the angle between the extension direction of the connecting line and the thickness direction of the frame is less than 30 degrees, the extension direction of the connecting line is inclined relative to the thickness direction of the frame, and the air outlet section is downward.

[0022] According to the grille assembly of the present invention, at least some of the blades are configured such that the extension direction of the connecting line is inclined relative to the thickness direction of the frame, and the air outlet section is downward, so that the airflow can be blown further by gravity, further suppressing airflow short-circuiting.

[0023] Furthermore, in the grille assembly of the present invention, the blades near the top of the frame are preferably configured such that the extension direction of the connecting line is consistent with the thickness direction of the frame.

[0024] According to the grille assembly of the present invention, the blades near the top of the frame are configured such that the extension direction of the connecting line is consistent with the thickness direction of the frame. Therefore, this helps to improve the airflow (return air path) in the upper part of the frame and prevents the airflow that has just been blown out from the outdoor unit of the air conditioner from being sucked back through the grille gaps at the top of the frame (i.e., return air short circuit).

[0025] Furthermore, in the grille assembly of the present invention, it is preferable that a curvature abrupt change point exists in the outline of the air inlet section at a location lower than the end point of the air inlet section, and the curvature abrupt change point is closer to the edge of the air inlet side in the thickness direction of the frame than the end point of the air inlet section.

[0026] According to the grille assembly of the present invention, in the profile of the blade, there is a curvature abrupt change point in the air inlet section at a position lower than the end point of the air inlet section. The curvature abrupt change point is closer to the edge of the air inlet side in the thickness direction of the frame than the end point of the air inlet section. Therefore, at the curvature abrupt change point, the airflow blown out from the outdoor unit of the air conditioner can be quickly divided into an airflow flowing along the upper surface of the blade and an airflow flowing along the lower surface of the blade, which helps to guide the airflow direction and improves the aesthetics.

[0027] (Invention Effects)

[0028] According to the present invention, the air inlet section of the blade is formed by connecting multiple curved segments, which helps to guide the airflow, reduce pressure loss, and allow the airflow to be blown further, thereby reducing the possibility of airflow short-circuiting. Furthermore, on the air inlet section side of the blade, the upper surface (or lower surface) is raised, while the lower surface (or upper surface) is relatively flat. Therefore, pressure loss can be further reduced, allowing the airflow to flow smoothly along the surface of the blade, thereby further reducing the possibility of airflow short-circuiting. Attached Figure Description

[0029] Figure 1 This is a side sectional view schematically showing the usage state of the grille assembly according to an embodiment of the present invention.

[0030] Figure 2 This is a partially enlarged side sectional view schematically illustrating a grille assembly according to an embodiment of the present invention.

[0031] Figure 3 This is a side sectional view schematically illustrating the blades included in the grille assembly according to an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the velocity vector distribution between the blades of the grid assembly in a simulated test example. It represents a cross-section obtained by cutting with a plane perpendicular to the length direction of the blade.

[0033] Figure 5 This is a diagram illustrating the blade numbering and selection of the grid assembly in the simulated test example.

[0034] Figure 6A This is a schematic diagram showing the inter-blade velocity vector distribution between blades 1 to 3 of the grid assembly in a simulated test example.

[0035] Figure 6B This is a schematic diagram showing the inter-blade velocity vector distribution between the 8th and 10th blades of the grid assembly in a simulated test example.

[0036] Figure 6C This is a schematic diagram showing the inter-blade velocity vector distribution between blades 19 and the ground blades of the grid assembly in a simulated test example.

[0037] Figure 7 This is a side sectional view schematically showing the usage state of a grille assembly of a modified embodiment of the present invention.

[0038] Figure 8 This is a side sectional view schematically illustrating a modified example of the blades in a grille assembly according to a modified example of the present invention.

[0039] (Symbol Explanation)

[0040] 1. Grille assembly

[0041] 10. Frame

[0042] 20 blades

[0043] 20a Inlet Section

[0044] 20b air outlet section

[0045] 20c connecting section

[0046] 2. Air conditioner outdoor unit

[0047] 21. Air vent cover

[0048] CT contour line

[0049] BD Building

[0050] S Reserved space Detailed Implementation

[0051] Below, in conjunction with Figures 1 to 6C The grille assembly according to an embodiment of the present invention will be described.

[0052] For ease of explanation, we define two mutually orthogonal directions as the X direction and the Y direction, and designate one side of the X direction as X1 and the other side of the X direction as X2. We designate one side of the Y direction as Y1 and the other side of the Y direction as Y2. We also designate Y1 to be consistent with the top.

[0053] (Overall structure of the grille assembly)

[0054] like Figure 1 and Figure 2 As shown, the grille assembly 1 includes a frame 10, within which a plurality of blades 20 are arranged in a manner that runs along the height direction of the frame 10 (the Y direction in the illustrated example).

[0055] Here, as Figure 1 and Figure 2 As shown, the grille assembly 1 forms part of the exterior wall of building BD, and the outdoor air conditioning unit 2, located in the reserved space S of building BD, directs airflow toward the grille assembly 1 (see reference). Figure 1 (See the arrow in the image). Specifically, the grille assembly 1 is positioned in front of the air outlet of the outdoor unit 2, providing a shielding effect and enhancing the aesthetics of the building's exterior. During installation, a certain distance must be maintained between the outdoor unit 2 and the grille assembly 1; specifically, a certain distance must be maintained between the air outlet hood 21 of the outdoor unit 2 and the grille assembly 1; preferably, the distance is not less than 70mm. This ensures that the airflow from the air outlet hood 21 of the outdoor unit 2 is not obstructed by the grille assembly 1 and can be smoothly discharged and blown far away, preventing the airflow from being drawn back in, thus ensuring the heat exchange performance of the outdoor unit 2. In summer, especially in extremely hot weather, the high temperature of the airflow from the outdoor unit 2 makes it difficult for hot air to diffuse. With the help of the grille assembly 1, the airflow is blown further, effectively preventing short-circuiting and ensuring the heat exchange performance of the outdoor unit 2, thereby ensuring the cooling effect in summer and guaranteeing user comfort.

[0056] In addition, such as Figure 1 and Figure 2 As shown, the blades 20 are evenly distributed at specified intervals in the height direction of the grille assembly 1, which is simple in structure and easy to process. Of course, the blades 20 can also be unevenly distributed. For example, the blade interval in the area opposite to the outdoor air conditioner 2 is smaller than the blade interval in the area outside the outdoor air conditioner 2, which can better shield the outdoor air conditioner 2 and improve the aesthetics of the building's exterior wall.

[0057] In addition, although not shown, the frame 10 of the grille assembly 1 includes a top beam, a bottom beam, and columns that connect the two ends of the top beam in the length direction to the two ends of the bottom beam in the length direction.

[0058] Furthermore, although not illustrated, the blade 20 is elongated in shape, with its length direction (in line with...) Figure 1 and Figure 2 The two ends of the blade 20 (vertically perpendicular to the paper surface) are fixedly connected to the columns at both ends of the frame 10 by fasteners, specifically by bolts or the like. The fasteners can be set on the inner surface of the blade 20, eliminating the need for fixing on the outer surface of the blade 20, thus minimizing obstruction to airflow. Alternatively, the two ends of the blade 20 along its length can be directly welded to the columns.

[0059] In addition, the grille assembly 1 can be made of metal materials such as aluminum alloy or galvanized steel, or non-metallic materials such as aging-resistant PVC or resin.

[0060] (Structure of the blade)

[0061] like Figures 1 to 3 As shown, the blade 20 includes an inlet section 20a and an outlet section 20b, in the direction of the blade 20 along its length (and) Figure 1 and Figure 2 In the profile line CT of the cross section perpendicular to the paper (perpendicular to the paper), the air inlet section 20a is formed by connecting multiple curves. The intersection of the line X connecting the two points with the largest distance in the profile line CT and the air inlet section 20a constitutes the air inlet section endpoint B. The intersection of the line X and the air outlet section 20b constitutes the air outlet section endpoint C. Let the maximum distance from the part of the profile line CT located on one side of the line X, i.e., the first part (the upper part in the example shown), to the line X be L1, and let the maximum distance from the part of the profile line CT located on the other side of the line X, i.e., the second part (the lower part in the example shown), to the line X be L2, then the following relationship is satisfied: L1 > L2.

[0062] Here, as Figure 3 As shown, the blade 20 also includes a connecting section 20c, which connects the air inlet section 20a and the air outlet section 20b. In the outline CT, the connecting section 20c is composed of at least a curve among curves and straight lines.

[0063] In addition, such as Figure 3 As shown, in the contour line CT, there is a curvature abrupt change point A in the air inlet section 20a, which is located below the end point B of the air inlet section.

[0064] In addition, such as Figure 3As shown, the highest point D in the first part of the contour line CT, which is the one with the greatest distance from the connecting line X, is closer to the end point B of the air inlet section in the direction parallel to the connecting line X than the lowest point E in the second part of the contour line CT, which is the one with the greatest distance from the connecting line X (i.e., L3 < L4).

[0065] In addition, such as Figure 3 As shown, the curvature abrupt change point A and the lowest point E are smoothly connected by the curve.

[0066] In addition, such as Figure 3 As shown, the first and second parts of the air outlet section 20b side of the outline CT are both straight lines (in the example shown, the main body of the line connecting points E and C, and the line connecting points D and C are both straight lines). Let the thickness of the blade 20 at the first point P1 on the air inlet section 20a side of the line X (the dimension in the direction perpendicular to the line X) be T1, and let the thickness of the blade 20 at the second point P2 on the air outlet section 20b side of the line X be T2. When the distance between the air inlet end point B and the first point P1 is equal to the distance between the air outlet end point C and the second point P2, the following relationship is satisfied: T1 > T2.

[0067] (The arrangement of the blades within the frame)

[0068] like Figure 1 and Figure 2 As shown, the blade 20 is configured in the frame 10 such that: in the direction of the blade 20 along its length (and) Figure 1 and Figure 2 The angle between the line X connecting the two points with the greatest distance in the profile CT of the cross section (perpendicular to the paper) and the thickness direction of the frame 10 (in the example shown, the X direction, which also corresponds to the horizontal direction) is less than 70 degrees.

[0069] Here, as Figure 1 and Figure 2 As shown, the blade 20 is configured within the frame 10 such that the extension direction of the aforementioned connecting line X is inclined relative to the thickness direction of the frame 10, and the air outlet section faces downward (first installation state). Preferably, the blade 20 is configured within the frame 10 such that the extension direction of the aforementioned connecting line X is inclined at 30 degrees relative to the thickness direction of the frame 10 (i.e., the angle between the extension direction of the aforementioned connecting line X and the thickness direction of the frame 10 is 30 degrees), and the air outlet section faces downward (i.e., point C is lower than point B). More preferably, the blade 20 is configured within the frame 10 such that the extension direction of the aforementioned connecting line X is inclined at 20 degrees relative to the thickness direction of the frame 10, and the air outlet section faces downward. Thus, the lower surface of the air outlet section of the blade 20 is nearly horizontal, allowing the airflow from the grille assembly 1 to travel further in a generally horizontal direction.

[0070] Furthermore, in the above-described installation configuration, it is preferable that the blade 20 is positioned within the frame 10 at a curvature abrupt change point A that is closer to the edge of the frame 10 in the thickness direction than the end point B of the inlet section. Figure 1 and Figure 2 (The edge on the X1 direction side) In this way, the airflow blowing from the outdoor unit 2 of the air conditioner can be quickly split at the curvature change point A, so that part of the airflow flows along the upper surface of the blade 20 and the other part flows along the lower surface of the blade 20, so that the airflow can flow forward quickly and smoothly.

[0071] Alternatively, the blade 20 can be configured in the frame 10 such that the extension direction of the connecting line X is consistent with the thickness direction of the frame 10, that is, the extension direction of the connecting line X is horizontal (second installation state).

[0072] In addition, such as Figure 1 As mentioned above, in the grille assembly 1, the installation direction of each blade 20 is consistent, and all of them are set downwards at the air outlet.

[0073] (Simulated test example)

[0074] With an ambient temperature of 43℃ and an outlet air temperature of 54℃, and an outlet air velocity of 2.1m / s for the outdoor unit of the air conditioner, the following conditions were met: an opening ratio (the ratio of airflow area to grille area) of 70%, 20 blades, and blades tilted downwards at 20°. Figure 3 Using the blade 20 shown as the object for simulation experiments, the following results can be obtained: Figure 4 The vector distribution between the blades is shown.

[0075] Here, if as Figure 5 As shown, if 20 blades are numbered from top to bottom, the inter-blade vector distribution at the first group of blades (i.e., blades 1 to 3) is as follows. Figure 6A As shown, the Figure 6A This reflects the gas flow from the environment back to the outdoor unit. The inter-blade vector distribution at the second group of blades (i.e., blades 8-10) is as follows: Figure 6B As shown, the Figure 6B This reflects the flow of high-temperature gas discharged from the outdoor unit of the air conditioner into the environment. The vector distribution between the blades at the third group of blades (i.e., blades 19 to the ground) is as follows: Figure 6C As shown, the Figure 6C It reflects the gas flow near the ground. (By...) Figure 4 , Figure 6B and Figure 6C It can be seen that the airflow blown out from the outdoor unit of the air conditioner and flowing through the grille assembly 1 has a relatively high speed, can be blown far away quickly, and is not prone to airflow short circuit.

[0076] (Main effects of this implementation method)

[0077] According to the grille assembly 1 of this embodiment, the air inlet section 20a of the blade 20 is formed by connecting multiple curved segments, which helps to guide the airflow, reduce pressure loss, and allow the airflow to be blown further, thereby reducing the possibility of airflow short-circuiting. Furthermore, on the air inlet section 20a side of the blade 20, the upper surface is raised and the lower surface is relatively flat, which can further reduce pressure loss and allow the airflow to flow smoothly along the surface of the blade 20, thereby further reducing the possibility of airflow short-circuiting.

[0078] Furthermore, according to the grille assembly 1 of this embodiment, taking the first installation state (the connecting line X is inclined at 20 degrees relative to the thickness direction of the frame 10) as an example, the airflow blown out from the air outlet cover 21 of the outdoor unit 1 of the air conditioner flows to the air inlet section 20a of the blade 20. The airflow is cut at the curvature change point A, and a part of it flows along the upper surface of the blade 20. The upper surface of the air inlet section 20a is smoothly raised. When the horizontal airflow flows through the upper surface of the air inlet section 20a, the upper surface streamlines are dense, the pressure is low, the airflow resistance is small, the flow velocity increases, and the airflow can move quickly through. After the airflow flows through the air inlet section 20a, it flows quickly along the connecting section 20c and the air outlet section 20b in sequence and flows out almost horizontally along the direction of the air outlet section, so that it can blow farther.

[0079] Furthermore, according to the grille assembly 1 of this embodiment, the blade 20 has a large air inlet section and a small air outlet section (i.e., a large head and a small tail). In addition to a portion of the airflow flowing along the upper surface of the blade 20, another portion of the airflow flows along the lower surface of the blade 20. The lower surface of the blade 20 is relatively flat compared to the upper surface of the blade 20, which helps to improve the stability of the airflow and prevents turbulence. Moreover, the shape of the blade 20 helps to blow the airflow further, avoids airflow short-circuiting, and thus improves the performance of the outdoor unit of the air conditioner.

[0080] Furthermore, according to the grille assembly 1 of this embodiment, the lower and upper surfaces of two adjacent blades 20 form an airflow channel. The cross-sectional area of ​​the airflow channel in the connecting section 20c (the area of ​​the cross section obtained by cutting with a section perpendicular to the X direction) S1 is smaller than the cross-sectional area of ​​the airflow channel in the inlet section 20a S2, which can effectively prevent airflow separation and help increase the flow velocity (according to the airflow simulation effect: the airflow velocity increases when the airflow reaches the connecting section, especially near point D).

[0081] Furthermore, according to the grille assembly 1 of this embodiment, in the first installation state, the airflow direction in the entire airflow channel is stable and there is no turbulence.

[0082] Furthermore, according to the grille assembly 1 of this embodiment, in the first installation state, point D on the upper surface and point E on the lower surface are approximately on a plumb line, where the cross-sectional area of ​​the airflow channel is the smallest. As a result, after the airflow passes through this point, the cross-sectional area of ​​the airflow channel gradually increases, which helps the airflow to diffuse outward quickly and avoids airflow short circuit.

[0083] Furthermore, according to the grille assembly 1 of this embodiment, the main body of the line connecting points E and C, and the line connecting points D and C, are all straight lines. The line connecting points E and C forms a sharp angle relative to the line connecting points D and C. Therefore, it helps the airflow to quickly strip the surface of the blade outlet and blow further.

[0084] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0085] For example, in the above embodiment, there are two air outlet covers 21 of the outdoor unit 2 of the air conditioner, but it is not limited to this and may also be one or more.

[0086] In addition, in the above embodiments, some blades 20 may have their air outlet sections set downward (for example, the air outlet sections of blades 20 in the area opposite to the outdoor unit 2 of the air conditioner may be set downward), while the remaining blades 20 may be set horizontally (i.e., the extension direction of the above connecting line X is consistent with the thickness direction of the frame 10) or have their air outlet sections set upward.

[0087] Furthermore, in the above embodiments, it is also possible to... Figure 7 As shown, the angle of the blades 20 above the air outlet hood 21 (i.e. the angle formed by the extension direction of the line X and the thickness direction of the frame 10) gradually changes along the height direction of the frame 10.

[0088] Furthermore, in the above embodiment, the highest point D is closer to the end point B of the air inlet section than the lowest point E in the direction parallel to the connecting line X. However, it is not limited to this. It is also possible that the highest point D is closer to the end point C of the air outlet section than the lowest point E in the direction parallel to the connecting line X, or that the highest point D and the lowest point E are located at the same position in the direction parallel to the connecting line X.

[0089] Furthermore, in the above embodiment, the first and second parts of the air outlet section 20b side of the contour line CT are both straight lines, but it is not limited to this and can also be a curve that is close to a straight line.

[0090] Furthermore, in the above embodiment, the curvature abrupt change point A and the lowest point E are smoothly connected by a curve, but it is not limited to this; the curvature abrupt change point A and the lowest point E can also be connected by a straight line.

[0091] Furthermore, in the above embodiment, in the contour line CT, there is a curvature abrupt change point A in the part of the air inlet section 20a that is lower than the end point B of the air inlet section, but it is not limited to this, and there may be no curvature abrupt change point A.

[0092] Furthermore, in the above embodiments, such as Figure 8As shown, the end of the air outlet section 20b of the blade 20 can also be cut off. In this case, the end point C of the air outlet section corresponds to the intersection of the extension lines of the upper and lower surfaces of the air outlet section 20b. Here, the so-called "outline" refers to the outline when the end of the air outlet section is not cut off.

[0093] Furthermore, in the above embodiments, the blades 20 can also be arranged upside down or left-right.

[0094] It should be understood that within the scope of this invention, the various parts of the embodiments can be freely combined, or the various parts of the embodiments can be appropriately modified or omitted.

Claims

1. A blade comprising an inlet section and an outlet section, wherein the inlet section is formed by connecting multiple curved segments in the outline of a cross-section of the blade in a direction orthogonal to its length direction, characterized in that, In the outline, the intersection of the line connecting the two points with the greatest distance (X) and the air inlet section constitutes the air inlet section endpoint (B). Let L1 be the maximum distance from the first part of the contour line located on one side of the connecting line (X), and L2 be the maximum distance from the second part of the contour line located on the other side of the connecting line (X). Then the following relationship is satisfied: L1 > L2, In the outline, the second part near the end point (B) of the air inlet section also has a curvature abrupt change point (A), which allows the airflow to the blade to be cut at the curvature abrupt change point (A).

2. The blade as described in claim 1, characterized in that, The highest point (D) of the first part of the contour line that is the furthest from the connecting line (X) is closer to the end point (B) of the air intake section than the lowest point (E) of the second part of the contour line that is the furthest from the connecting line (X) in the direction of extension of the connecting line.

3. The blade as described in claim 1, characterized in that, The highest point (D) of the first part of the contour line that is the furthest from the connecting line (X) is closer to the end point (B) of the air intake section than the lowest point (E) of the second part of the contour line that is the furthest from the connecting line (X) in the direction of extension of the connecting line. The curvature abrupt change point (A) and the lowest point (E) are smoothly connected by a curve.

4. The blade as described in claim 1, characterized in that, The blade also includes a connecting section. The connecting section connects the air inlet section and the air outlet section. In the outline, the connecting segment is composed of at least a curve and a straight line.

5. The blade as described in claim 1, characterized in that, The first and second portions of the air outlet section of the outline are both straight lines. The intersection of the connecting line (X) and the air outlet section constitutes the end point (C) of the air outlet section. Let the thickness of the blade at the first point on the air inlet side of the line (X) be T1, and let the thickness of the blade at the second point on the air outlet side of the line (X) be T2. When the distance between the end point (B) of the air inlet section and the first point is equal to the distance between the end point (C) of the air outlet section and the second point, the following relationship is satisfied: T1 > T2.

6. A grille assembly comprising a frame, wherein a plurality of blades according to any one of claims 1 to 5 are arranged within the frame in a manner aligned along the height direction of the frame, characterized in that... At least some of the blades are configured such that the angle between the extension direction of the connecting line (X) and the thickness direction of the frame is less than 70 degrees.

7. The grille assembly as claimed in claim 6, characterized in that, At least some of the blades are configured such that the angle between the extension direction of the connecting line (X) and the thickness direction of the frame is less than 30 degrees, the extension direction of the connecting line (X) is inclined relative to the thickness direction of the frame, and the air outlet section is downward.

8. The grille assembly as claimed in claim 6, characterized in that, The blade near the top of the frame is configured such that the extension direction of the connecting line (X) is consistent with the thickness direction of the frame.

9. The grille assembly as claimed in claim 8, characterized in that, In the vertical direction, the curvature abrupt change point (A) is located below the end point (B) of the air inlet section. The curvature abrupt change point (A) is closer to the edge of the air inlet side in the thickness direction of the frame than the air inlet section endpoint (B).

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