Grid assembly

Abstract

The utility model discloses a grid assembly. The grille assembly includes: a blade; the contour line of the blade-shaped section comprises a first line segment which is an arc line, and two end points of the first line segment are a point A and a point B up and down; the second line segment and the first line segment are located at the two ends of the frame body in the thickness direction respectively, and the two end points of the second line segment are an upper point F and a lower point E; the first part is connected between the point A and the point F, and the first part comprises a first upper branch line segment which is smoothly connected with the point A; the second part is connected between the point B and the point E, and the second part comprises a first lower branch line segment which is smoothly connected with the point B; the upper side of the first part is a first side, the lower side of the second part is a second side, and the curvature center of the first upper branching section is located on the second side; the curvature center of the first lower branching section is located on the first side; and the L of the blade profile section in the height direction is gradually reduced from the middle position of the blade to the direction close to the second line segment. The grille assembly is applied to the wall close to the air conditioner outdoor unit, and airflow short circuit at the air conditioner outdoor unit can be effectively restrained.

Description

Technical Field

[0001] This application relates to the technical field of air circulation, and particularly to a grille assembly. Background Art

[0002] Air conditioner outdoor units are usually installed on the exterior walls of buildings. In some installation scenarios, a reserved space for the air conditioner outdoor unit is provided on the exterior wall of the building.

[0003] To ensure the overall aesthetics of the building, a grille assembly is provided on the exterior wall to hide the air conditioner outdoor unit. The air outlet and air return of the air conditioner outdoor unit both communicate with the atmosphere through the grille assembly.

[0004] However, during actual use, the air flow blown out by the air conditioner outdoor unit is prone to short - circuit when flowing through the blades of the grille assembly, that is, the blown - out air flow is sucked back by the outdoor unit again. The short - circuit phenomenon in extremely high / low temperature weather can cause the air conditioner to frequently shut down, affecting the user experience. Summary of the Utility Model

[0005] This application provides a grille assembly, which is applied to the wall near the air conditioner outdoor unit and can effectively suppress the air flow short - circuit phenomenon at the air conditioner outdoor unit.

[0006] On one aspect of this application, a grille assembly includes: a frame body; a plurality of blades arranged in the frame body in a manner of being arranged along the height direction of the frame body; a plane W is orthogonal to the length direction of the blade, and the cross - section of the blade intercepted by the plane W is a blade - type cross - section. The contour line of the blade - type cross - section includes: a first line segment, which is an arc, and the two end points of the first line segment are point A and point B located below point A; a second line segment, which is located at both ends of the frame body in the thickness direction respectively with the first line segment, the length of the second line segment is less than that of the first line segment, and the two end points of the second line segment are point F and point E located below point F; a first part, which has at least one curve, and the first part is connected between point A and point F, and the first part includes: a first upper - dividing line segment, which is smoothly connected to point A; a second part, which has at least one curve, and the second part is connected between point B and point E, and the second part includes: a first lower - dividing line segment, which is smoothly connected to point B;

[0007] The upper side of the first part is the first side, the lower side of the second part is the second side, the center of curvature of the first upper - dividing line segment is located on the second side, the center of curvature of the first lower - dividing line segment is located on the first side, and from the middle position of the blade in the thickness direction of the frame body towards the direction close to the second line segment, the thickness L of the blade - type cross - section in the height direction gradually decreases.

[0008] In this application, the contour line of the blade profile has an arc-shaped first line segment, a first upper sub-line segment and a first lower sub-line segment that are smoothly connected to the first line segment. The shape formed by the first line segment, at least the part of the first upper sub-line segment close to the first line segment, and at least the part of the first lower sub-line segment close to the first line segment is similar to the head of a fish; the part where the thickness L of the blade profile gradually decreases is similar to the tail of a fish. Therefore, the blade profile is similar to a fish shape. By using the low-resistance streamline shape with fish-shaped bionic features, the wind resistance of the blade can be reduced. When the grille assembly is applied to the outside of the air conditioner outdoor unit, due to the reduction of wind resistance at the blade, the smoothness of the air flow passing through the blade during the intake and exhaust of the air conditioner outdoor unit can be improved, and the air flow of the air conditioner outdoor unit can be blown farther, avoiding the occurrence of air flow short circuit, and thus the performance of the air conditioner outdoor unit can be improved.

[0009] In some embodiments, the first part further includes: a second upper sub-line segment connected between the first upper sub-line segment and the second line segment. The connection point of the second upper sub-line segment and the first upper sub-line segment is point G, and the center of curvature of the second upper sub-line segment is located on the second side;

[0010] The second part further includes: a second lower sub-line segment connected to the first lower sub-line segment. The connection point of the second lower sub-line segment and the first lower sub-line segment is point C, and the center of curvature of the second lower sub-line segment is located on the second side; a third lower sub-line segment connected between the second lower sub-line segment and the second line segment. The connection point of the third lower sub-line segment and the second lower sub-line segment is point D, and the center of curvature of the third lower sub-line segment is located on the second side;

[0011] Taking a straight line Q passing through any point on the first line segment and parallel to the height direction as a reference, from the point among point G and point C that is farther from the straight line Q, in the direction approaching the second line segment, the thickness L of the blade profile in the height direction gradually decreases.

[0012] In some embodiments, the curve in the contour line is an arc, and the radius of the arc satisfies: R(AB) < R(BC), R(AB) < R(AG); R(AG) < R(GF), R(BC) < R(DE).

[0013] R(AB) < R(BC), R(AB) < R(AG). The radius R(AB) of the first line segment is smaller than the radius R(BC) of the first lower sub-line segment connected to it and the radius R(AG) of the first upper sub-line segment connected to it, making the first line segment a relatively pointed end with a small area, which can reduce the blockage of the air flow. The first line segment is also an arc surface, which is beneficial to guiding the flow of the air flow.

[0014] R(AG) < R(G F), R(BC) < R(DE). The radius of the part of the blade near the second line segment is greater than that of the part near the first line segment. The curve of the blade head is smoothly raised, which can reduce the pressure loss and increase the smoothness of the airflow along the blade surface. The curve of the blade tail is flatter, which can make the airflow blow farther, thereby further improving the aerodynamic drag of the blade and increasing the air supply distance.

[0015] In some embodiments, the length of the first part is less than that of the second part. The second part has a longer length, and the second lower sub-line segment and the third lower sub-line segment are more concave. The air airflow flows closer to the first side, which can further increase the smoothness of the airflow.

[0016] In some embodiments, the first part includes: a second upper sub-line segment connected to the first upper sub-line segment. The connection point of the second upper sub-line segment and the first upper sub-line segment is point G, and the center of curvature of the second upper sub-line segment is located on the second side; a third upper sub-line segment connected between the second upper sub-line segment and the second line segment, and the center of curvature of the third upper sub-line segment is located on the first side.

[0017] The second part includes: a second lower sub-line segment connected to the first lower sub-line segment. The connection point of the second lower sub-line segment and the first lower sub-line segment is point C, and the center of curvature of the second lower sub-line segment is located on the second side; a third lower sub-line segment connected between the second lower sub-line segment and the second line segment, and the center of curvature of the third lower sub-line segment is located on the first side.

[0018] Taking the straight line Q passing through any point on the first line segment and parallel to the height direction as a reference, from the point among point G and point C that is farther from the straight line Q towards the direction close to the second line segment, the thickness L of the airfoil section in the height direction gradually decreases.

[0019] In some embodiments, the length of the first part is L1, and the length of the second part is L2, and L1 = (0.8 - 1.2)L2.

[0020] In this application, L1 and L2 are relatively close, which can ensure that the first part and the second part are flatter at the tail, facilitating the smooth outflow of the airflow from the tail of the blade, thereby making the airflow blow farther.

[0021] In some embodiments, the central angle of the first line segment is 90° - 120°. In this application, when the central angle of the first line segment is within this range, the oncoming flow impact can be improved and the resistance of the blade to the airflow can be reduced.

[0022] In some embodiments, the length of the first part is L1, and the length of the second part is L2; the magnitude of the central angle of the first line segment is inversely correlated with the value of L1 / L2. This can ensure that within the range of the central angle value of the first line segment, the shape of the blade changes little generally.

[0023] In some embodiments, one end of the blade near the second line segment is serrated along the length direction of the blade. When the air flow exits from the serrated end, it is dispersed by the serrations, which is beneficial to the rapid diffusion of the air flow and avoids the accumulation of the air flow at the blade.

[0024] In some embodiments, with a straight line P passing through point A and parallel to the thickness direction of the frame as a reference, the first upper sub-line segment is located on the upper side of the straight line P.

[0025] In this application, the upper side surface of the head of the blade is in a raised shape, which is beneficial to reducing the pressure loss and increasing the smoothness of the air flow along the surface of the blade 20.

[0026] On the other hand, a grille assembly of this application is characterized by comprising: a frame; a plurality of blades arranged in the frame in a manner of being arranged along the height direction of the frame; a plane W is orthogonal to the length direction of the blade, and the cross-section of the blade intercepted by the plane W is an airfoil cross-section. The contour line of the airfoil cross-section includes: a first line segment, which is an arc, and the two end points of the first line segment are point A and point B located below point A respectively; a second line segment, which is located at both ends of the frame in the thickness direction respectively with the first line segment, the length of the second line segment is less than that of the first line segment, and the two end points of the second line segment are point F and point E located below point F respectively; a first part, which has at least one curve, and the first part is connected between point A and point F. The first part includes: a first upper sub-line segment, which is smoothly connected to point A; a second part, which has at least two curves, and the second part is connected between point B and point E. The second part includes: a first lower sub-line segment, which is smoothly connected to point B, and the other end point of the first lower sub-line segment is point C; a second lower sub-line segment, which is smoothly connected to the other end point C of the first lower sub-line segment; wherein, the center of curvature of the first upper sub-line segment is located on the second side; the center of curvature of the first lower sub-line segment is located on the first side; the center of curvature of the second lower sub-line segment is located on the second side;

[0027] From the middle position of the blade in the thickness direction of the frame towards the direction close to the second line segment, the thickness L of the airfoil cross-section in the height direction gradually decreases.

[0028] In this application, the contour line of the blade profile has an arc-shaped first line segment, a first upper segment and a first lower segment that are smoothly connected to the first line segment. The shape formed by the first line segment and at least the part of the first upper segment close to the first line segment, and at least the part of the first lower segment close to the first line segment is similar to the head of a fish; the part where the thickness L gradually decreases in the blade profile is similar to the tail of a fish. Therefore, the blade profile is similar to a fish shape. By utilizing the low-resistance streamline of the fish-shaped bionic feature, the wind resistance of the blade can be reduced. When the grille assembly is applied to the outside of the air conditioner outdoor unit, due to the reduction of wind resistance at the blade, the smoothness of the air flow passing through the blade during the air intake and exhaust of the air conditioner outdoor unit can be improved, and the air flow of the air conditioner outdoor unit can be blown farther, avoiding the occurrence of air flow short circuit, and thus the performance of the air conditioner outdoor unit can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. 6 shows a side cross-sectional view of the usage state of the grille assembly according to some embodiments;

[0030] Figure 2 FIG. 10 shows a perspective view of the grille assembly according to some embodiments;

[0031] Figure 3 FIG. 14 shows a side cross-sectional view of the grille assembly according to some embodiments;

[0032] Figure 4 FIG. 18 shows a side cross-sectional view of the blade in the grille assembly according to some embodiments;

[0033] Figure 5 FIG. 22 shows a side cross-sectional view of the grille assembly according to some other embodiments;

[0034] Figure 6 FIG. 26 shows a side cross-sectional view of the blade in the grille assembly according to some other embodiments;

[0035] Figure 7 FIG. 30 shows a top view of the blade in the grille assembly according to some embodiments;

[0036] FIG. 8(a) is a whole-machine simulation cloud diagram of the outside of an air conditioner outdoor unit with straight blades in the prior art;

[0037] FIG. 8(b) is a whole-machine simulation cloud diagram of the outside of an air conditioner outdoor unit with the blades of Embodiment 1;

[0038] FIG. 8(c) is a whole-machine simulation cloud diagram of the outside of an air conditioner outdoor unit with the blades of Embodiment 2;

[0039] FIG. 9(a) is a simulation cloud diagram of the air flow during the return air between the blades of the grille assembly in the prior art;

[0040] FIG. 9(b) is a simulation cloud diagram of the air flow during the return air between the blades of Embodiment 1 of the grille assembly of the present application;

[0041] Figure 9(c) is a simulation cloud chart of the air flow when air returns between the blades of the second embodiment of the grille assembly of the present application;

[0042] Figure 10(a) is a simulation cloud chart of the air flow when air exits between the blades of the grille assembly in the prior art;

[0043] Figure 10(b) is a simulation cloud chart of the air flow when air exits between the blades of the first embodiment of the grille assembly of the present application;

[0044] Figure 10(c) is a simulation cloud chart of the air flow when air exits between the blades of the second embodiment of the grille assembly of the present application.

[0045] In each of the above figures, 1 is the grille assembly; 10 is the frame; 11 is the cross beam; 12 is the vertical beam; 20 is the blade; 21 is the first line segment; 22 is the second line segment; 23 is the first part; 231 is the first upper sub-line segment; 232 is the second upper sub-line segment; 233 is the third upper sub-line segment; 24 is the second part; 241 is the first lower sub-line segment; 242 is the second lower sub-line segment; 243 is the third lower sub-line segment; 2 is the outdoor unit of the air conditioner; 3 is the building; 301 is the reserved space. Detailed implementation manners

[0046] To make the purpose and implementation manners of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0048] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0049] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "linkage" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] Referring to Figure 1 , the arrow on the front side in the figure indicates the flow direction of the air outlet airflow of the outdoor unit of the air conditioner, and the arrow on the rear side indicates the flow direction of the return air airflow of the outdoor unit of the air conditioner. In an application scenario, the grille assembly 1 forms a part of the outer wall of the building 3. There is a reserved space 301 on the building 3, and the outdoor unit 2 of the air conditioner is installed in the reserved space 301. The grille assembly 1 is connected to the outer wall to enclose the reserved space 301 and achieve the concealed installation of the outdoor unit 2 of the air conditioner. The air outlet airflow of the outdoor unit of the air conditioner blows out through the grille assembly 1 to the outside of the reserved space 301.

[0051] Referring to Figure 2 , the grille assembly 1 includes a frame 10. The frame 10 includes two cross beams 11 arranged at intervals up and down, and vertical beams 12 connected to both ends of the two cross beams. The two cross beams 11 and the two vertical beams 12 enclose a rectangular frame.

[0052] The frame 10 and the outer wall can be connected by fasteners such as bolts. Alternatively, the frame 10 can be clamped on the outer wall.

[0053] The grille assembly 1 includes blades 20. A plurality of blades 20 are arranged in the frame 10 in a manner of being arranged along the height direction of the grille assembly 1. The height direction of the grille assembly 1 is also the height direction of the frame 10.

[0054] The blades 20 are strip-shaped, and both ends in the length direction of the blades 20 are respectively connected to the vertical beams 12 of the frame 10.

[0055] The frame 10 and the blades 20 can be made of metal materials such as aluminum alloy and galvanized steel. Between the cross beam 11 and the vertical beam 12, and between the blade 20 and the frame 10, they can be connected by fasteners such as screws, or directly welded.

[0056] The frame 10 and the blades 20 can also be made of non-metal materials such as aging-resistant PVC and resin. The frame 10 and the blades 20 can be integrally injection-molded, or the two can be connected by fasteners such as screws.

[0057] The frame 10 and the blades 20 can also be of different materials. For example, the frame 10 is made of a metal material, and the blades 20 are made of a non-metal material.

[0058] Reference Figures 3 to 6 As shown in Figures 3 to 6 , the cross-section of the blade 20 orthogonal to its length direction is the blade profile cross-section. Specifically, in combination with Figure 2 , the plane W is orthogonal to the length direction of the blade 20, and the cross-section of the blade 20 intercepted by the plane W is the blade profile cross-section. The contour line of the blade profile cross-section includes a first line segment 21. The first line segment 21 is an arc, and the two end points of the first line segment 21 are point A and point B respectively. Figure 2 The contour line includes a second line segment 22. The second line segment 22 can be an arc or a straight line, and the two end points of the second line segment 22 are point E and point F respectively.

[0059] Among them, the first line segment 21 and the second line segment 22 are respectively located at both ends in the width direction of the blade 20, and the width direction of the blade 20 is also the thickness direction of the grille assembly 1 or the housing 10. In the height direction, point A is above point B, and point F is above point E.

[0060] For the convenience of description, in this application, the end of the blade 20 where the first line segment 21 is located is called the head end of the blade 20, and the end where the second line segment 22 is located is called the tail end of the blade 20; the part of the blade 20 close to the head end is called the head part, and the part of the blade 20 close to the tail end is called the tail part.

[0061] The length of the first line segment 21 is greater than the length of the second line segment 22 to form a shape with a large head and a small tail. The length of the straight line connection between point A and point B is greater than the length of the straight line connection between point F and point E.

[0062]

[0063] The contour line includes a first part 23. The first part 23 is connected between point A of the first line segment 21 and point F of the second line segment 22.

[0064] The first part 23 includes at least one section of curve, and the curve that is smoothly connected to point A in the first part 23 is the first upper sub-segment 231.

[0065] The contour line includes a second part 24. The second part 24 is connected between point B of the first line segment 21 and point E of the second line segment 22.

[0066] The second part 24 includes at least one section of curve, and the curve that is smoothly connected to point B in the second part 24 is the first lower sub-segment 241. One end point of the first lower sub-segment 241 is connected to point B, and the other end point of the first lower sub-segment 241 is point C.

[0067] The center of curvature of the first upper sub-segment 231 is located on the lower side of the blade 20, and the center of curvature of the first lower sub-segment 241 is located on the upper side of the blade 20.

[0068] For convenience of description, in the height direction of the grille assembly 1, the upper side of the first part 23 is the first side, and the lower side of the second part 24 is the second side. Then, the center of curvature of the first upper sub-segment 231 is located on the second side, and the center of curvature of the first lower sub-segment 241 is located on the first side.

[0069] From the middle position in the width direction of the blade 20 towards the direction close to the second segment 22, the thickness L of the blade profile in the height direction gradually decreases. The width direction of the blade is also the thickness direction of the housing.

[0070] In this application, the shape formed by the first segment 21, at least the part of the first upper sub-segment 231 close to the first segment 21, and at least the part of the first lower sub-segment 241 close to the first segment 21 is similar to the head of a fish, and the part where the thickness L gradually decreases in the blade profile is similar to the tail of a fish. Therefore, the blade profile is similar to a fish shape. This application utilizes the low-resistance streamline of the fish-shaped bionic feature to reduce the wind resistance of the blade 20.

[0071] When the grille assembly is applied to the outside of the air conditioner outdoor unit, if the wind resistance at the blade is large, it is very easy to occur the phenomenon of air flow short circuit where the air flow blown out by the air conditioner outdoor unit is sucked back by the outdoor unit.

[0072] However, due to the reduction of the wind resistance at the blade 20 in this application, it can improve the smoothness of the air flow passing through the blade 20 for the air intake and exhaust of the air conditioner outdoor unit, and can also make the air flow blown out by the air conditioner outdoor unit farther, avoiding the occurrence of air flow short circuit, and thus can improve the performance of the air conditioner outdoor unit.

[0073] (Embodiment 1 of the blade 20)

[0074] In some embodiments, referring to Figure 3 and Figure 4 , the first part 23 includes a second upper sub-segment 232 connected between the first upper sub-segment 231 and the second segment 22. One end point of the second upper sub-segment 232 is connected to the point G of the first upper sub-segment 231, and the other end of the second upper sub-segment 232 is connected to the point F of the second segment 22. The center of curvature of the second upper sub-segment 232 is located on the second side.

[0075] The second part 24 includes a second lower sub-segment 242 and a third lower sub-segment 243 connected in sequence between the first lower sub-segment 241 and the second segment 22.

[0076] The point where the second lower sub-segment 242 is connected to the first lower sub-segment 241 is point C, and the point where the second lower sub-segment 242 is connected to the third lower sub-segment 243 is point D.

[0077] The center of curvature of the second lower sub-segment 242 is located on the second side, and the center of curvature of the third lower sub-segment 243 is located on the second side.

[0078] Taking the straight line Q passing through any point of the first line segment 21 and parallel to the height direction as a reference, for the point among point C and point G that is farther from the straight line Q, in the direction approaching the second line segment 22, the thickness L of the airfoil section gradually decreases in the height direction.

[0079] According to an embodiment of the present application, in the width direction of the blade 20, the distance from point G to the head end of the blade 20 is greater than the distance from point C to the head end of the blade 20. The distance from point D to the head end of the blade 20 is greater than the distance from point G to the head end of the blade 20. In the height direction of the blade 20, the height of point D is higher than that of point C.

[0080] From point G in the direction approaching the second line segment 22, the thickness L of the airfoil section gradually decreases in the height direction.

[0081] According to an embodiment of the present application, the curves of the first part 23 and the second part 24 are both arcs. The radius of the first line segment 21 is R(AB), the radius of the first lower sub-line segment 241 is R(BC), the radius of the second lower sub-line segment 242 is R(CD), the radius of the third lower sub-line segment 243 is R(DE), the radius of the first upper sub-line segment 231 is R(AG), and the radius of the second upper sub-line segment 232 is R(GF). Then R(AB) < R(BC) < R(AG) < R(DE) < R(GF) < R(CD).

[0082] Among them, R(AB) < R(BC), R(AB) < R(AG). The radius R(AB) of the first line segment 21 is smaller than the radius R(BC) of the first lower sub-line segment 241 and the radius R(AG) of the first upper sub-line segment 231 connected thereto. This makes the first line segment 21 a relatively sharp end portion with a smaller area, which can reduce the blockage of the air flow. Moreover, the first line segment 21 is an arc surface, which is beneficial to guiding the flow of the air flow.

[0083] Among them, R(AG) < R(G F), R(BC) < R(DE). The radius of the part of the blade 20 close to the second line segment 22 is greater than the radius of the part close to the first line segment 21. The curve of the head of the blade 20 is smoothly raised, which can reduce the pressure loss and increase the smooth flow of the air flow along the surface of the blade 20; the curve of the tail of the blade 20 is flatter, which can make the air flow blow farther, thereby further improving the aerodynamic resistance of the blade 20 and increasing the air supply distance.

[0084] According to an embodiment of the present application, the length of the first part 23 is L1, and the length of the second part 24 is L2, and L2 > L1. The second part 24 has a longer length, and the greater the degree of depression of the second lower sub-line segment 242 and the third lower sub-line segment 243, the more the air flow approaches the first side to flow, which can further increase the smoothness of the air flow.

[0085] (Second Embodiment of Vane 20)

[0086] In some embodiments, referring to Figure 5 and Figure 6 , the first part 23 includes a second upper sub-segment 232 and a third upper sub-segment 233 that are sequentially connected between the first upper sub-segment 231 and the second segment 22. The connection point of the second upper sub-segment 232 and the first upper sub-segment 231 is point G, and the connection point of the second upper sub-segment 232 and the third upper sub-segment 233 is point H. The center of curvature of the second upper sub-segment 232 is located on the second side, and the center of curvature of the third upper sub-segment 233 is located on the first side.

[0087] The second part 24 is wavy and includes a second lower sub-segment 242 and a third lower sub-segment 243 that are sequentially connected between the first lower sub-segment 241 and the second segment 22. The point where the second lower sub-segment 242 is connected to the first lower sub-segment 241 is point C, and the point where the second lower sub-segment 242 is connected to the third lower sub-segment 243 is point D. The center of curvature of the second lower sub-segment 242 is located on the second side, and the center of curvature of the third lower sub-segment 243 is located on the first side.

[0088] In this embodiment, the tail end of the vane 20 is different from that of the previous embodiment. This embodiment is formed by the tail end of the vane 20 in the previous embodiment being upturned.

[0089] Taking the straight line Q passing through any point on the first line segment 21 and parallel to the height direction as a reference, for the point among point C and point G that is farther from the straight line Q, in the direction of approaching the second line segment 22, the thickness L of the airfoil section in the height direction gradually decreases.

[0090] In this embodiment, the distance from point G to the straight line Q is greater than the distance from point C to the straight line Q. Therefore, from point G in the direction of approaching the second line segment 22, the thickness L of the airfoil section in the height direction gradually decreases.

[0091] In some embodiments, the curves of the first part 23 and the second part 24 are both arcs. The radius of the first line segment 21 is R(AB), the radius of the first lower sub-segment 241 is R(BC), the radius of the second lower sub-segment 242 is R(CD), the radius of the third lower sub-segment 243 is R(DE), the radius of the first upper sub-segment 231 is R(AG), the radius of the second upper sub-segment 232 is R(HG), and the radius of the third upper sub-segment is R(HF). Then R(AB) < R(BC) < R(AG) < R(HF) < R(DE) < R(HG) < R(CD).

[0092] Among them, R(AB) < R(BC), R(AB) < R(AG). The radius R(AB) of the first line segment 21 is smaller than the radius R(BC) of the first lower sub-segment 241 and the radius R(AG) of the first upper sub-segment 231 connected thereto, making the first line segment 21 a relatively pointed end with a smaller area, which can reduce the blockage of the air flow. The first line segment 21 is also an arc surface, which is beneficial to guiding the flow of the air flow.

[0093] Among them, R(AG) < R(HF), R(BC) < R(DE). The radius of the tail of the blade 20 is greater than the radius of its head. The curve of the head of the blade 20 is smoothly raised, which can reduce the pressure loss and increase the smoothness of the air flow along the surface of the blade 20; the curve of the tail of the blade 20 is flatter, which can make the air flow blow farther, thereby further improving the aerodynamic resistance of the blade 20 and increasing the air supply distance.

[0094] According to the second embodiment of the present application, the length of the first part 23 is L1, and the length of the second part 24 is L2, and L1 = (0.8 - 1.2)L2. This can make the lengths of the first part 23 and the second part 24 relatively close. On the premise of ensuring the shape of the head of the blade 20, if the difference between L1 and L2 is large, then the tail of the first part 23 or the second part 24 needs to be more curved to adapt to the change in length. For example, when L1 is large, the tail of the first part 23 needs to be more curved to obtain a larger length, and when L2 is large, the tail of the second part 24 needs to be more curved to obtain a larger length.

[0095] L1 and L2 are relatively close, which can ensure that the first part 23 and the second part 24 are flatter at the tail, which is beneficial to the smooth outflow of the air flow from the tail of the blade 20, so that the air flow blows farther.

[0096] In the above two embodiments, the central angle of the first line segment 21 can be 90° - 120°. The central angle of the first line segment 21 within this range can improve the oncoming flow impact and reduce the resistance of the blade 20.

[0097] In some embodiments, the size of the central angle of the first line segment 21 is inversely correlated with the L1 / L2 value. That is, the central angle of the first line segment 21 increases as the L1 / L2 value decreases. This can ensure that within the value range of the central angle of the first line segment 21, the shape of the blade 20 changes little generally.

[0098] In some embodiments, referring to Figure 7 , one end (the tail end) of the second line segment 22 on the blade 20 is serrated along the length direction. When the air flow flows out of the serrated end, it is dispersed by the serrations, which is beneficial to the rapid diffusion of the air flow and avoids the accumulation of the air flow at the blade 20.

[0099] In the current example, the edges of the serrations are straight line segments, presenting a triangular shape. The pitch of the serrations is 6 - 24 mm, the width is 1.5 - 6 mm, and the tooth angle is 20 - 60°. As the pitch increases, the width and tooth angle increase accordingly. In other embodiments, the edges of the serrations can also be wavy.

[0100] Referring to Figures 3 to 6 , the setting of the blade 20 on the frame 10: With the height direction of the grille assembly 1 as a reference, the first part 23 of the blade 20 is located above the second part 24.

[0101] With the straight line P passing through point A and parallel to the thickness direction of the grille assembly 1 as a reference, the first upper sub-segment 231 is located on the upper side of the straight line P.

[0102] The upper side of the head of the blade 20 is in a raised shape, which is beneficial to reducing the pressure loss and increasing the smoothness of the airflow flowing along the surface of the blade 20.

[0103] When the grille assembly 1 is installed on the outer side of the air conditioner outdoor unit, the first line segment 21 of the blade 20 is closer to the air conditioner outdoor unit than the second line segment 22.

[0104] In this application, a comparative simulation is carried out on the outer side of the air conditioner outdoor unit using the straight blades in the prior art, the blades of Embodiment 1, and the blades of Embodiment 2, and the following data are obtained:

[0105]

[0106] As can be seen from the above table: At the same fan speed, after the grille assembly adopts the blades of Embodiment 1 and Embodiment 2, the overall air volume of the whole machine is improved compared with the prior art, the aerodynamic resistance of the grille assembly is decreased, and the air supply distance of the outdoor unit is increased.

[0107] Through the optimization of the shape of the blade 20 in this application, not only the aerodynamic resistance of the grille assembly 1 is improved, the air volume of the whole machine under the design conditions is optimized, but also the air supply distance is significantly increased, and the air flow short circuit of the air conditioner outdoor unit is avoided.

[0108] Figure 8(a) is the overall machine simulation cloud map of the outer side of the air conditioner outdoor unit using the straight blades in the prior art, Figure 8(b) is the overall machine simulation cloud map of the outer side of the air conditioner outdoor unit using the blades of Embodiment 1, and Figure 8(c) is the overall machine simulation cloud map of the outer side of the air conditioner outdoor unit using the blades of Embodiment 2.

[0109] It can be found from the simulation results in Figure 8: By using the grille assembly 1 of this application, the air supply distance can be significantly increased (limited by a wind speed of 1 m / s), which is at least 50% higher than the prior art.

[0110] FIG. 9(a) is a simulation cloud diagram of the air flow when air returns between the blades of the grille assembly of the prior art, FIG. 9(b) is a simulation cloud diagram of the air flow when air returns between the blades of the first embodiment of the grille assembly of the present application, and FIG. 9(c) is a simulation cloud diagram of the air flow when air returns between the blades of the second embodiment of the grille assembly of the present application. FIG. 10(a) is a simulation cloud diagram of the air flow when air exits between the blades of the grille assembly of the prior art, FIG. 10(b) is a simulation cloud diagram of the air flow when air exits between the blades of the first embodiment of the grille assembly of the present application, and FIG. 10(c) is a simulation cloud diagram of the air flow when air exits between the blades of the second embodiment of the grille assembly of the present application.

[0111] It can be found from the simulation results in FIGS. 9 and 10 that: compared with the prior art, the air flow of the blades for air outlet and air return of the present application is more uniform, effectively reducing the resistance and increasing the air volume.

[0112] As described above, according to the embodiment of the present application, the contour line of the blade 20 has an arc-shaped first line segment 21, a first upper sub-line segment 231 and a first lower sub-line segment 241 that are smoothly connected to the first line segment 21. The shape formed by at least the part of the first line segment 21 and the first upper sub-line segment 231 close to the head end of the blade 20 and at least the part of the first lower sub-line segment 241 close to the head end of the blade 20 is similar to the head of a fish; from the middle position of the blade towards the direction close to the second line segment 22, the thickness L in the height direction of the blade profile gradually decreases, and the part where the thickness L of the blade profile gradually decreases is similar to the tail of a fish. Therefore, the blade profile is similar to a fish shape. By using the low-resistance streamline shape of the fish-shaped bionic feature, the wind resistance of the blade 20 can be reduced. When the grille assembly is applied to the outside of the air conditioner outdoor unit, due to the reduction of the wind resistance at the blade 20, the smoothness of the air flow passing through the blade 20 for the air inlet and outlet of the air conditioner outdoor unit can be improved, and the air flow of the air conditioner outdoor unit can be blown farther, avoiding the occurrence of air flow short circuit, and thus the performance of the air conditioner outdoor unit can be improved.

[0113] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0114] For convenience of explanation, the above description has been made in connection with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A grille assembly, characterized in that, Comprising: A housing; A plurality of blades arranged in the housing in a manner of being arranged along the height direction of the housing; The plane orthogonal to the length direction of the blade is plane W, and the cross-section of the blade intercepted by plane W is an airfoil cross-section. The contour line of the airfoil cross-section includes: A first line segment, which is an arc. The two end points of the first line segment are point A and point B located below point A respectively; A second line segment, which and the first line segment are respectively located at both ends in the thickness direction of the housing. The length of the second line segment is less than that of the first line segment. The two end points of the second line segment are point F and point E located below point F respectively; A first part, which has at least one curve. The first part is connected between point A and point F. The first part includes: A first upper sub-line segment, smoothly connected to point A; A second part, which has at least one curve. The second part is connected between point B and point E. The second part includes: A first lower sub-line segment, smoothly connected to point B; Wherein, the upper side of the first part is the first side, the lower side of the second part is the second side. The center of curvature of the first upper sub-line segment is located on the second side; the center of curvature of the first lower sub-line segment is located on the first side; from the middle position of the blade in the thickness direction of the housing towards the direction close to the second line segment, the thickness L of the airfoil cross-section in the height direction gradually decreases.

2. The grille assembly according to claim 1, characterized in that, The first part further includes: A second upper sub-line segment, connected between the first upper sub-line segment and the second line segment. The connection point of the second upper sub-line segment and the first upper sub-line segment is point G. The center of curvature of the second upper sub-line segment is located on the second side; The second part further includes: A second lower sub-line segment, connected to the first lower sub-line segment. The connection point of the second lower sub-line segment and the first lower sub-line segment is point C. The center of curvature of the second lower sub-line segment is located on the second side; A third lower sub-line segment, connected between the second lower sub-line segment and the second line segment. The connection point of the third lower sub-line segment and the second lower sub-line segment is point D. The center of curvature of the third lower sub-line segment is located on the second side; Taking the straight line Q passing through any point of the first line segment and parallel to the height direction as a reference, from the point among point G and point C that is farther from the straight line Q towards the direction close to the second line segment, the thickness L of the airfoil cross-section in the height direction gradually decreases.

3. The grille assembly according to claim 2, wherein, The curves in the contour line are arcs, and the radii of the arcs satisfy: R(AB)<R(BC), R(AB)<R(AG); R(AG)<R(GF), R(BC)<R(DE).

4. The grille assembly according to claim 1, characterized in that, The first part further includes: A second upper sub-line segment, connected to the first upper sub-line segment. The connection point of the second upper sub-line segment and the first upper sub-line segment is point G. The center of curvature of the second upper sub-line segment is located on the second side; A third upper sub-line segment, connected between the second upper sub-line segment and the second line segment. The center of curvature of the third upper sub-line segment is located on the first side; The second part further includes: The second lower sub-segment is connected to the first lower sub-segment. The connection point of the second lower sub-segment and the first lower sub-segment is point C. The center of curvature of the second lower sub-segment is located on the second side; The third lower sub-segment is connected between the second lower sub-segment and the second segment. The center of curvature of the third lower sub-segment is located on the first side; Taking a straight line Q passing through any point on the first segment and parallel to the height direction as a reference, in the direction from the point among point G and point C that is farther from the straight line Q towards the second segment, the thickness L of the blade profile in the height direction gradually decreases.

5. The grille assembly according to claim 4, characterized in that, The length of the first part is L1, and the length of the second part is L2, where L1 = (0.8 - 1.2)L2.

6. The grille assembly according to claim 1, characterized in that, The central angle of the first segment is 90° - 120°.

7. The grille assembly according to claim 6, wherein, The length of the first part is L1, and the length of the second part is L2; The magnitude of the central angle of the first segment is inversely correlated with the value of L1 / L2.

8. The grille assembly according to claim 1, characterized in that, One end of the blade near the second segment is serrated along the length direction of the blade.

9. The grille assembly according to claim 1, wherein Taking a straight line P passing through point A and parallel to the thickness direction of the frame as a reference, the first upper sub-segment is located on the upper side of the straight line P.

10. A grille assembly, characterized in that, Comprising: A frame; A plurality of blades arranged in the frame in a manner of being arranged along the height direction of the frame; The plane orthogonal to the length direction of the blade is plane W. The cross-section of the blade intercepted by plane W is a blade profile. The contour line of the blade profile includes: A first segment, which is an arc. The two end points of the first segment are point A and point B located below point A respectively; A second segment, which is located at both ends of the thickness direction of the frame respectively with the first segment. The length of the second segment is less than that of the first segment. The two end points of the second segment are point F and point E located below point F respectively; A first part, which has at least one curve. The first part is connected between point A and point F. The first part includes: A first upper sub-segment, which is smoothly connected to point A; A second part, which has at least two curves. The second part is connected between point B and point E. The second part includes: A first lower sub-segment, which is smoothly connected to point B. The other end point of the first lower sub-segment is point C; A second lower sub-segment, which is smoothly connected to the other end point C of the first lower sub-segment; Wherein, the upper side of the first part is the first side, the lower side of the second part is the second side. The center of curvature of the first upper sub-segment is located on the second side; the center of curvature of the first lower sub-segment is located on the first side; the center of curvature of the second lower sub-segment is located on the second side; From the middle position of the blade in the thickness direction of the frame towards the direction close to the second segment, the thickness L of the blade profile in the height direction gradually decreases.

Images