Ceiling fan blade, fan wheel assembly and air conditioner

Abstract

The application provides a ceiling machine fan blade, a fan wheel assembly and an air conditioner. The ceiling machine fan blade comprises a fan blade shell, the fan blade shell comprises a pressure surface and a suction surface, and a sound reduction notch is arranged on a trailing edge of the fan blade shell. The ceiling machine fan blade has the advantages that the hollow structure is integrally formed by blow molding, the sound reduction structure of the convex point is added to the surface of the fan blade, the sound reduction notch structure is added to the tail of the fan blade, the noise generated by the airflow near the trailing edge of the fan blade shell is reduced, and the performance of the ceiling machine fan blade is improved.

Description

Technical Field

[0001] This invention relates to the field of ceiling air conditioning technology, and particularly to a ceiling air conditioning fan blade, fan wheel assembly, and air conditioner. Background Technology

[0002] A ceiling-mounted air conditioner, also known as a recessed air conditioner, is a type of indoor air conditioning unit. Its biggest advantage is that it can be placed in the center of the room, allowing for better heat and cold dissipation. This not only achieves rapid cooling and heating but also eliminates dead zones in the cooling / heating process.

[0003] However, air conditioners often generate two types of noise during operation. One is mechanical noise, such as when a ceiling-mounted air conditioner is running, the centrifugal impeller is prone to collision with the air guide ring in the radial direction, which produces noise. The other is airflow noise, which is often caused by a variety of factors such as high airflow resistance and severe turbulence.

[0004] In existing technologies, such as Figures 1-4 As shown, a ceiling fan impeller assembly is disclosed. The fan blades 3 on the impeller are generally assembled by first clamping plates 3A and 3B, which has low assembly efficiency and is prone to deformation under the influence of wind pressure during use, forming a large wake at the tail of the fan blades 3, and the airflow noise is relatively obvious.

[0005] As living standards improve, consumers are increasingly pursuing higher quality products and paying more attention to energy efficiency and noise levels. How to reduce impeller airflow noise has always been a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention aims to provide a ceiling fan blade, fan wheel assembly and air conditioner to reduce airflow noise from the fan blade.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] A ceiling fan blade includes a fan blade housing, the fan blade housing having a pressure surface and a suction surface, and a noise-absorbing notch is provided on the trailing edge of the fan blade housing.

[0009] Furthermore, the trailing edge of the fan blade casing has a streamlined design that tends to approach the leading edge from the upper edge to the lower edge, and the noise reduction notch is located on the trailing edge near the lower edge.

[0010] Furthermore, the silencing notch is arc-shaped from the upper edge to the lower edge, and the notch guide surface on the silencing notch is inclined from the end near the tail edge to the end near the front edge.

[0011] Furthermore, the height of the lower end of the silencing notch from the lower surface of the lower edge is H1, the height of the upper end of the silencing notch from the lower surface of the lower edge is H2, the distance from the edge near the tail edge at the center of the silencing notch to the tail of the lower edge is L1, and the distance from the edge near the leading edge at the center of the silencing notch to the tail of the lower edge is L2. H1, H2, L1, and L2 satisfy the following relationship:

[0012] 5(L2-L1)>H2-H1>2(L2-L1), and the value of H1 ranges from 0.4L1 to 0.65L1.

[0013] Furthermore, the notch guide surface has a cut angle of β from the end near the suction surface to the end near the pressure surface, and the value of β ranges from 25° to 35°.

[0014] Furthermore, several protrusions are provided on the pressure surface of the fan blade.

[0015] Furthermore, the protrusions are designed in the shape of a frustum, and several of the protrusions are evenly distributed on the pressure surface.

[0016] Furthermore, a cavity is formed between the pressure surface and the suction surface, and the pressure surface and the suction surface are integrally formed by blow molding.

[0017] Compared with existing technologies, the ceiling fan blades of this invention have the following advantages:

[0018] (1) The ceiling fan blade of the present invention reduces airflow noise by setting a sound-absorbing notch on the trailing edge of the fan blade shell, thereby improving the noise performance of the equipment and enhancing the user experience.

[0019] (2) The ceiling machine fan blade of the present invention has a hollow structure integrally formed by blow molding, a sound-absorbing structure with raised points added to the surface of the fan blade, and a sound-absorbing notch structure added to the tail of the fan blade, thereby reducing the noise generated by the airflow near the tail edge of the fan blade shell and improving the performance of the ceiling machine fan blade.

[0020] Another object of the present invention is to provide a wind turbine assembly, including a hub, the lower edge of which extends to form a base plate, and a wind blade as described above is provided on the base plate. The wind blade is inserted into the base plate, and a guide ring is inserted into the upper end of the wind blade. A through air inlet is provided on the guide ring for air intake to the wind turbine, and an air outlet is formed between the base plate, the guide ring, and the wind blade.

[0021] The third objective of this invention is to provide an air conditioner in which a fan assembly as described above is provided, wherein the hub of the fan assembly is connected to the motor shaft via a bushing and is thereby driven to rotate by the motor.

[0022] The air conditioner and fan assembly described above have the same advantages over the prior art as the ceiling fan blades described above, and will not be repeated here. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a side view of the existing ceiling-mounted fan rotor assembly.

[0025] Figure 2 This is an exploded structural diagram of the fan blades on the impeller assembly of a ceiling-mounted air conditioner.

[0026] Figure 3 This is a first-view side view structural diagram of the wind turbine assembly of a ceiling-mounted air conditioner.

[0027] Figure 4 This is a second-view side view structural diagram of the wind turbine assembly of a ceiling-mounted air conditioner.

[0028] Figure 5 This is a side view of the wind turbine blades on the ceiling-mounted air conditioner impeller assembly according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the second-view structure of the wind turbine blades on the ceiling-mounted air compressor assembly according to an embodiment of the present invention;

[0030] Figure 7 This is a third-view structural diagram of the wind turbine blades on the ceiling-mounted air compressor assembly according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the notch structure marking on the wind turbine blades of the ceiling-mounted air compressor assembly according to an embodiment of the present invention;

[0032] Figure 9 This is a cross-sectional view of the notched structure on the blade of the ceiling-mounted air compressor impeller assembly according to an embodiment of the present invention.

[0033] Figure 10 This is a partially enlarged structural diagram of the notch angle on the wind turbine blade according to an embodiment of the present invention;

[0034] Figure 11 This is a front view structural diagram of the ceiling fan impeller assembly according to an embodiment of the present invention;

[0035] Figure 12 This is a side view of the ceiling fan impeller assembly according to an embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the structure of the wind turbine assembly mounted on the chassis in the ceiling-mounted air conditioning unit according to an embodiment of the present invention;

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Hub; 2. Base plate; 3. Fan blade; 3A. First clamping plate; 3B. First clamping plate; 301. Leading edge; 302. Trailing edge; 303. Upper edge; 304. Lower edge; 31. Fan blade housing; 311. Pressure surface; 312. Suction surface; 32. Silencing notch; 321. Notch guide surface; 33. Protrusion; 4. Guide ring; 5. Air outlet; 6. Bushing; 7. Motor shaft. Detailed Implementation

[0039] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0040] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Example 1

[0044] like Figures 5-10 As shown, the present invention discloses a ceiling fan blade, including a fan blade housing 31, the fan blade housing 31 including a pressure surface 311 and a suction surface 312, and a noise reduction notch 32 is provided on the trailing edge 302 of the fan blade housing 31.

[0045] The ceiling fan blade described in this application, by providing a noise-absorbing notch 32 on the trailing edge of the fan blade housing 31, forms a vortex when the airflow passes through the trailing edge 302 of the fan blade. The noise-absorbing notch 32 can reduce the size and intensity of the vortex, and at the same time reduce the pressure difference between the pressure surface 311 and the suction surface 312 at the trailing edge 302 of the fan blade housing 31, so as to reduce the turbulence and resistance of the airflow, which helps to reduce the noise generated by the airflow near the trailing edge of the fan blade housing and improve the performance of the ceiling fan blade 3.

[0046] The ceiling fan blade disclosed in this application reduces airflow noise by setting a sound-absorbing notch 32 on the trailing edge 302 of the fan blade housing 31, thereby improving the noise performance of the equipment and enhancing the user experience.

[0047] As a preferred example of this application, the trailing edge 302 of the fan blade housing 31 has a streamlined design that tends to approach the leading edge 301 from the upper edge 303 to the lower edge 304, and the noise reduction notch 32 is disposed on the trailing edge 302 near the lower edge 304.

[0048] This setting helps to further reduce the eddies formed around the trailing edge 302, and can more effectively guide the airflow through and reduce the turbulence area. At the same time, since the area near the lower edge 304 on the trailing edge 302 is usually where airflow separation and turbulence formation occur, by setting a noise-absorbing notch 32 in this area, the formation of turbulence can be interfered with, thereby reducing noise, improving the performance of the fan blades, and potentially improving energy efficiency.

[0049] As a preferred example of this application, the silencing notch 32 is arc-shaped from the upper edge 303 to the lower edge 304, and the notch guide surface 321 on the silencing notch 32 is inclined from the end near the trailing edge 302 to the end near the leading edge 301. The overall arc-shaped structure and the inclined notch guide surface 321 allow the airflow guided by the fan blade 3 to pass smoothly over the silencing notch 32, reducing airflow turbulence and resistance, thereby reducing noise levels. It also helps to reduce vortex formation, improve airflow stability, increase fan blade efficiency, better control airflow, reduce noise generation mechanisms, and improve the overall performance of the fan blade 3.

[0050] As a preferred example of this application, the height of the lower end of the silencing notch 32 from the lower surface of the lower edge 304 is H1, the height of the upper end of the silencing notch 32 from the lower surface of the lower edge 304 is H2, the distance from the edge of the center of the silencing notch 32 near the trailing edge 302 to the tail of the lower edge 304 is L1, and the distance from the edge of the center of the silencing notch 32 near the leading edge 301 to the tail of the lower edge 304 is L2. H1, H2, L1, and L2 satisfy the following relationship:

[0051] 5(L2-L1)>H2-H1>2(L2-L1), and the value of H1 ranges from 0.4L1 to 0.65L1.

[0052] Specifically, such as Figure 8 As shown, taking the lower section of the trailing edge 302 of the fan blade 3 as a reference, the width of the silencing notch 32 between the leading edge 301 and the trailing edge 302 is in the X direction, and the height of the silencing notch 32 between the upper edge 303 and the lower edge 304 is in the Y direction. The length of the silencing notch 32 in the X direction is 16mm to 25mm, and the height in the Y direction is 8mm to 38mm. Specifically, L1 = 16.18mm, L2 = 24.36mm, H1 = 8.36mm, and H2 = 38mm. The height and length parameters of the silencing notch 32 and their relationship may have a significant impact on noise control. Through simulation and experimental measurements, limiting the parameters within the above-mentioned range can achieve better results. On the one hand, it can make the final fan blade 3 have a large air volume, ensuring the working efficiency of the fan blade 3. On the other hand, this setting helps to reduce airflow noise, and the outlet noise can also be effectively controlled, thereby achieving a balance between noise control and fan blade performance requirements, and optimizing the performance of the fan blade 3.

[0053] As a preferred example of this application, the notch guide surface 321 has a cut angle β from one end near the suction surface 312 to the other end near the pressure surface 311, with β ranging from 25° to 35°. Preferably, β ranges from 28° to 30°. The fan blade 3 of this application, by optimizing the cut angle β of the silencing notch 32, avoids or reduces the generation of vortices, improves the regularity and stability of airflow, further avoids the generation of airflow noise, and reduces airflow noise.

[0054] As a preferred example of this application, a plurality of protrusions 33 are provided on the pressure surface 311 of the fan blade 3. Preferably, the protrusions 33 are frustum-shaped, and the plurality of protrusions 33 are evenly distributed on the pressure surface 311. By providing a plurality of evenly distributed protrusions 33 on the pressure surface 311, the airflow can be disturbed, turbulence generation can be reduced, thereby reducing the airflow noise generated by the fan blade during operation. At the same time, the presence of the protrusions 33 also helps to control the separation of airflow on the surface of the fan blade 3, increase the fan blade wind force, and thus improve the noise control performance.

[0055] As a preferred example of this application, a cavity is formed between the pressure surface 311 and the suction surface 312, which are integrally formed by blow molding. Forming a cavity and integrally forming the blades by blow molding increases the structural strength of the fan blade 3. This design makes the fan blade more durable, especially under high-speed and high-load conditions. Simultaneously, the cavity formed between the pressure surface 311 and the suction surface 312 can absorb some noise vibration, reducing noise transmitted to the outside, lowering the vibration and noise level of the fan blade, reducing eddy current generation and losses, and improving the aerodynamic efficiency of the fan blade. Furthermore, integral blow molding makes it easier and more economical to manufacture the fan blade 3, reducing the number of parts and assembly complexity.

[0056] The fan blade 3 of the ceiling air conditioner described in this application has a hollow structure integrally formed by blow molding. A sound-absorbing structure with raised dots 33 is added to the surface of the fan blade 3, and a sound-absorbing notch 32 is added to the tail of the fan blade 3. This reduces the noise generated by the airflow near the tail edge 302 on the fan blade shell 31, improves the performance of the fan blade of the ceiling air conditioner, and enhances the user experience.

[0057] Example 2

[0058] like Figures 5-13As shown, this application also discloses a wind turbine assembly, including a hub 1. The lower edge of the hub 1 extends to form a base plate 2. A wind blade 3, as described in Embodiment 1 above, is disposed on the base plate 2. The wind blade 3 is inserted into the base plate 2. A guide ring 4 is inserted into the upper end of the wind blade 3. An air inlet is provided through the guide ring 4 for air intake into the wind turbine. An air outlet 5 is formed between the base plate 2, the guide ring 4, and the wind blade 3. Thus, during the rotation of the wind turbine assembly, air enters from the air inlet of the guide ring 4 and exits from the air outlet 5, thereby achieving airflow circulation.

[0059] This application also discloses an air conditioner, including a fan assembly as described in the above embodiments, wherein the hub 1 of the fan assembly is connected to the motor shaft 7 via a bushing 6 and is driven to rotate by the motor.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ceiling fan blade, characterized by, The fan blade shell (31) comprises a pressure surface (311) and a suction surface (312), a sound reduction notch (32) is arranged on the trailing edge (302) of the fan blade shell (31), the height of the lower end of the sound reduction notch (32) from the lower surface of the lower edge (304) is H1, the height of the upper end of the sound reduction notch (32) from the lower surface of the lower edge (304) is H2, the length of the edge of the sound reduction notch (32) near the trailing edge (302) at the center from the tail of the lower edge (304) is L1, the length of the edge of the sound reduction notch (32) near the leading edge (301) at the center from the tail of the lower edge (304) is L2, H1, H2, L1, L2 satisfy the following relationship: 5(L2-L1)>H2-H1>2(L2-L1), and the value range of H1 is 0.4L1-0.65L1.

2. The ceiling fan blade of claim 1, wherein, The trailing edge (302) of the fan blade shell (31) is designed in a streamline shape from the upper edge (303) to the lower edge (304) in a trend close to the leading edge (301), and the sound reduction notch (32) is arranged on the trailing edge (302) close to the lower edge (304).

3. The ceiling fan blade of claim 1 or 2, wherein, The sound reduction notch (32) is arranged in an arc shape from the upper edge (303) to the lower edge (304), and the notch guide surface (321) of the sound reduction notch (32) is arranged in an inclined shape from one end close to the trailing edge (302) to one end close to the leading edge (301).

4. The ceiling fan blade of claim 3, wherein, The notch guide surface (321) is arranged in an inclined shape from one end close to the suction surface (312) to the notch surface angle β close to the pressure surface (311), and the value range of β is 25°-35°.

5. The ceiling fan blade of claim 1 or 4, wherein, A plurality of convex points (33) are arranged on the pressure surface (311) of the fan blade.

6. The ceiling fan blade of claim 5, wherein, The convex points (33) are designed in a circular truncated cone shape, and the plurality of convex points (33) are arranged in a uniform distribution on the pressure surface (311).

7. The ceiling fan blade of claim 1 or 6, wherein, A cavity is formed between the pressure surface (311) and the suction surface (312), and the pressure surface (311) and the suction surface (312) are integrally formed by blow molding.

8. A wind wheel assembly, characterized by The hub (1) comprises a bottom plate (2) extended from the lower end edge, a fan blade as claimed in any one of claims 1-7 is arranged on the bottom plate (2), the fan blade (3) is inserted into the bottom plate (2), a flow guide ring (4) is inserted into the upper end of the fan blade (3), a through air inlet is arranged on the flow guide ring (4) for air inlet of the fan wheel, and an air outlet (5) is formed between the bottom plate (2), the flow guide ring (4) and the fan blade (3).

9. An air conditioner characterized by comprising: The fan wheel assembly as claimed in claim 8 is arranged on the air conditioner, the hub (1) of the fan wheel assembly is connected with the motor shaft (7) through a shaft sleeve (6), and is further driven to rotate by the motor.

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