Ceiling unit fan blade, wind wheel assembly and air conditioner

Abstract

The invention provides a ceiling unit fan blade, a wind wheel assembly and an air conditioner, the ceiling unit fan blade comprises a fan blade shell, the fan blade shell comprises a pressure surface and a suction surface, and a noise reduction notch is formed in the tail edge of the fan blade shell. According to the ceiling machine fan blade, the hollow structure is integrally formed through blow molding, the noise reduction structure with the protruding points is additionally arranged on the surface of the fan blade, and the noise reduction notch structure is additionally arranged at the tail of the fan blade, so that noise generated by airflow near the tail edge of the fan blade shell is reduced, and the performance of the ceiling machine fan blade is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ceiling fans, and in particular to a ceiling fan blade, a fan wheel assembly and an air conditioner. Background Art

[0002] A ceiling air conditioner is a type of ceiling embedded air conditioner, also known as a ceiling air conditioner, a patio air conditioner or an embedded air conditioner. A ceiling embedded air conditioner is actually a type of indoor air conditioner. A ceiling air conditioner can be placed in the middle of the room, which is also the biggest advantage of a ceiling air conditioner. Being able to place it in the middle of the room means that the cold and heat can be better diffused, which can not only achieve rapid cooling and heating, but also better eliminate the dead corners of cooling and heating.

[0003] However, air conditioners often produce two types of noise during operation. One is mechanical noise. For example, during the operation of a ceiling air conditioner, the centrifugal fan wheel is likely to collide with the air guide ring in the radial direction, causing noise. The other is airflow noise, which is often caused by multiple factors such as large air flow resistance and severe turbulence.

[0004] In the prior art, such as Figures 1 to 4 As shown, a ceiling fan wind wheel assembly is disclosed, in which the fan blades 3 on the fan wheel are generally assembled by snap-fitting the first clamping plate 3A and the first clamping plate 3B, and the assembly efficiency is low. In addition, the fan blades 3 are easily deformed due to the influence of wind pressure during use, and a large wake is formed at the tail of the fan blades 3, and the airflow noise is more obvious.

[0005] With the improvement of living standards, consumers are pursuing higher quality of life and are paying more and more attention to the energy efficiency and noise level of products. How to reduce the impeller airflow noise has always been a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

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

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

[0008] A ceiling fan blade comprises a fan blade shell, wherein the fan blade shell comprises a pressure surface and a suction surface, and a sound-absorbing notch is arranged on the trailing edge of the fan blade shell.

[0009] Furthermore, the trailing edge of the fan blade housing is streamlined from the upper edge to the lower edge with a tendency to approach the leading edge, and the silencer notch is arranged on the trailing edge at a position close to the lower edge.

[0010] Furthermore, the silencer notch is arranged in an arc shape from the upper edge to the lower edge, and the notch guide surface on the silencer notch is arranged in an inclined shape from the end close to the trailing edge to the end close to the leading 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 length of the edge of the center of the silencing notch close to the trailing edge from the tail of the lower edge is L1, the length of the edge of the center of the silencing notch close to the leading edge from the tail of the lower edge is L2, and H1, H2, L1, and L2 satisfy the following relationship:

[0012] 5(L2-L1)>H2-H1>2(L2-L1), and the value range of H1 is 0.4L1~0.65L1.

[0013] Furthermore, the cut surface angle of the notch guide surface from the end close to the suction surface to the end close to the pressure surface is β, and the value range of β is 25° to 35°.

[0014] Furthermore, a plurality of protrusions are arranged on the pressure surface of the fan blade.

[0015] Furthermore, the protrusions are designed in a truncated cone shape, and a plurality 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 the prior art, the ceiling fan blade of the present invention has the following advantages:

[0018] (1) The ceiling fan blade of the present invention reduces airflow noise by providing a silencer 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 fan blade described in the present invention has a hollow structure formed by blow molding, a sound-absorbing structure with raised points is added to the surface of the fan blade, and a sound-absorbing notch structure is added to the tail of the fan blade, so as to reduce the noise generated by the airflow near the trailing edge of the fan blade shell and improve the performance of the fan blade of the ceiling fan.

[0020] Another object of the present invention is to provide a wind wheel assembly, including a hub, wherein the lower edge of the hub extends to form a base plate, and the fan blades as described above are arranged on the base plate, and the fan blades are inserted into the base plate, and a guide ring is inserted into the upper end of the fan blade. A through air inlet is arranged on the guide ring for letting air into the wind wheel, and an air outlet is formed between the base plate, the guide ring and the fan blades.

[0021] The third object of the present invention is to provide an air conditioner, on which a wind wheel assembly as described above is arranged, and the hub of the wind wheel assembly is connected to the motor shaft through a shaft sleeve, and is then driven to rotate by the motor.

[0022] The advantages of the air conditioner and the wind wheel assembly are the same as those of the ceiling fan blades over the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a side view structural diagram of a ceiling fan wind wheel assembly in the prior art;

[0025] Figure 2 It is a schematic diagram of the exploded structure of the wind blades on the wind wheel assembly of the ceiling fan in the prior art;

[0026] Figure 3 It is a schematic diagram of the structure of the wind blade on the wind wheel assembly of a ceiling fan in the prior art from a first perspective;

[0027] Figure 4 It is a schematic diagram of the structure of the wind blade on the wind wheel assembly of a ceiling fan in the prior art from a second perspective;

[0028] Figure 5 It is a schematic diagram of the side view structure of the wind blades on the wind wheel assembly of the ceiling fan according to the embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the wind blades on the wind wheel assembly of the ceiling fan according to the embodiment of the present invention from a second viewing angle;

[0030] Figure 7 This is a schematic diagram of the structure of the wind blades on the wind wheel assembly of the ceiling fan according to an embodiment of the present invention from a third viewing angle;

[0031] Figure 8 This is a schematic diagram of the size identification structure of the notch structure on the wind blade of the ceiling fan wind wheel assembly according to the embodiment of the present invention;

[0032] Fig. 9 It is a schematic cross-sectional view of the notch structure on the wind blade of the wind wheel assembly of the ceiling fan according to the embodiment of the present invention;

[0033] Fig.10 It is a schematic diagram of a partially enlarged structure of the cut surface angle of the notch structure on the fan blade according to an embodiment of the present invention;

[0034] Fig.11 It is a front view structural schematic diagram of the ceiling fan wind wheel assembly according to an embodiment of the present invention;

[0035] Fig.12 It is a schematic diagram of the side view structure of the ceiling fan wind wheel assembly according to an embodiment of the present invention;

[0036] Fig.13 This is a schematic diagram of the structure in which the wind wheel assembly of the ceiling machine according to an embodiment of the present invention is installed on the chassis;

[0037] Description of reference numerals:

[0038] 1. Hub; 2. Bottom 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. Silencer notch; 321. Notch guide surface; 33. Bump; 4. Guide ring; 5. Air outlet; 6. Bushing; 7. Motor shaft. DETAILED DESCRIPTION

[0039] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0040] It should be noted that all the terms used in the present invention for directional and positional indications, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] Example 1

[0044] like Figures 5 to 10 As shown, the present invention discloses a ceiling fan blade, including a fan blade shell 31 , wherein the fan blade shell 31 includes a pressure surface 311 and a suction surface 312 , and a sound-absorbing notch 32 is arranged on the trailing edge 302 of the fan blade shell 31 .

[0045] The ceiling fan blade described in the present application is provided with a silencer notch 32 on the trailing edge of the fan blade shell 31. When the airflow passes through the trailing edge 302 of the fan blade, a vortex is formed. The silencer 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 shell 31, so as to reduce the turbulence and resistance of the airflow, thereby helping to reduce the noise generated by the airflow near the trailing edge of the fan blade shell and improve the performance of the fan blade 3 of the ceiling fan.

[0046] The ceiling fan blade disclosed in the present application reduces airflow noise by providing a silencer notch 32 on the trailing edge 302 of the fan blade housing 31, thereby improving the noise performance of the device and enhancing the user experience.

[0047] As a preferred example of the present application, the trailing edge 302 of the fan blade housing 31 is streamlined from the upper edge 303 to the lower edge 304 , approaching the leading edge 301 , and the silencer notch 32 is arranged on the trailing edge 302 close to the lower edge 304 .

[0048] This arrangement helps to further reduce the vortex formed by the airflow around the trailing edge 302, can more effectively guide the airflow and reduce the turbulent area, and because the position on the trailing edge 302 close to the lower edge 304 is usually where the airflow separates and turbulence is formed, by providing a silencer notch 32 in this area, the formation of turbulence can be interfered with, thereby achieving the purpose of reducing noise and improving the performance of the wind blade, and may also improve energy efficiency.

[0049] As a preferred example of the present application, the muffler notch 32 is arranged in an arc shape from the upper edge 303 to the lower edge 304, and the notch guide surface 321 on the muffler notch 32 is arranged in an inclined shape from the end close to the trailing edge 302 to the end close to the leading edge 301. The overall structure is in an arc shape and the notch guide surface 321 is arranged in an inclined shape, so that the airflow guided by the fan blade 3 can smoothly pass through the muffler notch 32, reducing the turbulence and resistance of the airflow, thereby reducing the noise level, and at the same time, it also helps to reduce the formation of vortices, improve the stability of the airflow, improve the efficiency of the fan blade, better control the flow of the airflow, and reduce the mechanism of generating noise, thereby improving the overall performance of the fan blade 3.

[0050] As a preferred example of the present 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 length of the edge of the center of the silencing notch 32 close to the trailing edge 302 from the tail of the lower edge 304 is L1, the length of the edge of the center of the silencing notch 32 close to the leading edge 301 from the tail of the lower edge 304 is L2, and H1, H2, L1, and L2 satisfy the following relationship:

[0051] 5(L2-L1)>H2-H1>2(L2-L1), and the value range of H1 is 0.4L1~0.65L1.

[0052] Specifically, 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 muffler notch 32 between the leading edge 301 and the trailing edge 302 is the X direction, the height of the muffler notch 32 between the upper edge 303 and the lower edge 304 is the Y direction, the length of the muffler notch 32 in the X direction is 16mm-25mm, and the height in the Y direction is 8mm-38mm. Specifically, L1=16.18mm, L2=24.36mm, H1=8.36mm, H2=38mm. The height and length parameters of the muffler notch 32 and the relationship between them may have an important impact on noise control. After simulation and experimental measurements, limiting the parameters within the above-defined range can achieve better results. On the one hand, the fan blade 3 finally formed can have a larger air volume and ensure the working efficiency of the fan blade 3. On the other hand, this setting helps to reduce airflow noise, and the wind noise can also be effectively controlled, so as to achieve a balance between noise control and the performance requirements of the fan blade and optimize the performance of the fan blade 3.

[0053] As a preferred example of the present application, the cut surface angle of the notch guide surface 321 from one end close to the suction surface 312 to the end close to the pressure surface 311 is β, and the value range of β is 25° to 35°. Preferably, the value range of β is 28° to 30°. The fan blade 3 described in the present application optimizes the cut surface angle β of the silencer notch 32 to avoid or weaken the generation of vortices, improve the regularity and stability of airflow, further avoid the generation of airflow noise, and reduce the flow noise of airflow.

[0054] As a preferred example of the present application, a plurality of convex points 33 are provided on the pressure surface 311 of the fan blade 3. Preferably, the convex points 33 are designed in a truncated cone shape, and the plurality of convex points 33 are evenly distributed on the pressure surface 311. By providing a plurality of evenly distributed convex points 33 on the pressure surface 311, the flow of the airflow can be disturbed, and the turbulence can be reduced, thereby achieving the purpose of reducing the airflow noise generated by the fan blade during operation. At the same time, the presence of the convex points 33 also helps to control the separation of the airflow on the surface of the fan blade 3, increase the wind force of the fan blade, and thus improve the noise control performance.

[0055] As a preferred example of the present application, 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. Forming a cavity and integrally forming by blow molding can increase the structural strength of the fan blade 3. This design can make the fan blade more durable, especially under high-speed and high-load conditions. At the same time, the cavity formed between the pressure surface 311 and the suction surface 312 can absorb part of the noise vibration, reduce the noise transmitted to the outside, reduce the vibration and noise level of the fan blade, reduce the generation and loss of vortex, and improve the aerodynamic efficiency of the fan blade. In addition, through integral blow molding, the fan blade 3 can be manufactured more easily and economically, reducing the number of parts and the complexity of assembly.

[0056] The fan blade 3 of the ceiling machine described in the present application has a hollow structure formed by blow molding, a sound-absorbing structure with a protrusion 33 is added to the surface of the fan blade 3, and a sound-absorbing notch 32 structure is added to the tail of the fan blade 3, so as to reduce the noise generated by the airflow near the trailing edge 302 on the fan blade shell 31, thereby improving the performance of the fan blade of the ceiling machine and enhancing the user experience.

[0057] Example 2

[0058] like Figures 5 to 13As shown, the present application also discloses a wind wheel assembly, including a hub 1, the lower edge of the hub 1 extends to form a bottom plate 2, the bottom plate 2 is provided with a fan blade 3 as described in the above embodiment 1, the fan blade 3 is plugged into the bottom plate 2, the upper end of the fan blade 3 is plugged with a guide ring 4, a through air inlet is provided on the guide ring 4 for letting air into the wind wheel, and an air outlet 5 is formed between the bottom plate 2, the guide ring 4, and the fan blade 3. Therefore, during the rotation of the wind wheel assembly, air is introduced from the air inlet of the guide ring 4, and finally discharged from the air outlet 5, thereby realizing the circulation of airflow.

[0059] The present application also discloses an air conditioner, comprising a wind wheel assembly as described in the above embodiment, wherein the hub 1 of the wind wheel assembly is connected to the motor shaft 7 via a shaft sleeve 6, and is then 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ceiling fan blade, characterized in that: The invention comprises a fan blade shell (31), wherein the fan blade shell (31) comprises a pressure surface (311) and a suction surface (312), and a sound-absorbing notch (32) is arranged on the trailing edge (302) of the fan blade shell (31).

2. The ceiling fan blade according to claim 1, characterized in that: The trailing edge (302) of the fan blade housing (31) is streamlined in design from the upper edge (303) to the lower edge (304) with a tendency to approach the leading edge (301), and the sound-absorbing notch (32) is arranged on the trailing edge (302) at a position close to the lower edge (304).

3. The ceiling fan blade according to claim 1 or 2, characterized in that: The silencer notch (32) is arranged in an arc shape from the upper edge (303) to the lower edge (304), and the notch guide surface (321) on the silencer notch (32) is arranged in an inclined shape from the end close to the trailing edge (302) to the end close to the leading edge (301).

4. The ceiling fan blade according to claim 3, characterized in that: The height of the lower end of the muffler notch (32) from the lower surface of the lower edge (304) is H1, the height of the upper end of the muffler notch (32) from the lower surface of the lower edge (304) is H2, the length of the edge of the center of the muffler notch (32) close to the trailing edge (302) from the tail of the lower edge (304) is L1, the length of the edge of the center of the muffler notch (32) close to the leading edge (301) from the tail of the lower edge (304) is L2, and H1, H2, L1, and L2 satisfy the following relationship: 5(L2-L1)>H2-H1>2(L2-L1), and the value range of H1 is 0.4L1~0.65L1.

5. The ceiling fan blade according to claim 4, characterized in that: The notch guide surface (321) has a cut surface angle β from one end close to the suction surface (312) to one end close to the pressure surface (311), and the value range of β is 25° to 35°.

6. The ceiling fan blade according to claim 1 or 5, characterized in that: A plurality of convex points (33) are arranged on the pressure surface (311) of the fan blade.

7. The ceiling fan blade according to claim 6, characterized in that: The convex points (33) are designed in a truncated cone shape, and a plurality of the convex points (33) are evenly distributed on the pressure surface (311).

8. The ceiling fan blade according to claim 1 or 7, characterized in that: 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.

9. A wind wheel assembly, characterized in that: It comprises a hub (1), the lower edge of the hub (1) extends to form a base plate (2), a ceiling fan blade as claimed in any one of claims 1 to 8 is arranged on the base plate (2), the fan blade (3) is plugged into the base plate (2), a guide ring (4) is plugged into the upper end of the fan blade (3), a through air inlet is arranged on the guide ring (4) for letting air into the fan wheel, and an air outlet (5) is formed between the base plate (2), the guide ring (4) and the fan blade (3).

10. An air conditioner, characterized in that: The air conditioner is provided with a wind wheel assembly as claimed in claim 9, wherein the hub (1) of the wind wheel assembly is connected to the motor shaft (7) via a shaft sleeve (6), and is then driven to rotate by the motor.

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