Movable impeller of fan and fan thereof

Abstract

The utility model discloses a movable impeller of a fan and the fan thereof. The movable impeller comprises a movable impeller upper end disc and a movable impeller lower end disc which are respectively distributed at intervals up and down, a movable impeller air inlet is formed in the center of the movable impeller upper end disc. A lower end disc of the movable impeller is fixedly connected with an output shaft of the fan motor; a plurality of movable impeller blades distributed in an arc shape are arranged between the movable impeller upper end disc and the movable impeller lower end disc, and movable impeller air outlets are formed between the outer sides of the adjacent movable impeller blades; an air guide structure close to the movable impeller air inlet is arranged on the inner side of each movable impeller blade, and the air inlet angle of each air guide structure is set to be 95-100 degrees, preferably 96-99.5 degrees and more preferably 96-99 degrees; according to the fan adopting the movable impeller, the working noise of the fan can be obviously reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fans, specifically relating to a moving impeller assembly of a fan and the fan thereof. Background Technology

[0002] As we all know, fans are widely used in household appliances. With the continuous development of the market, people's demands for household appliances are constantly increasing; furthermore, to obtain a better user experience, people hope that the noise generated by household appliance fans during operation will be continuously reduced. As the key core component determining the operating noise of a fan, the impeller has been the subject of some technological proposals to optimize its structure to reduce operating noise. However, these optimization schemes either have limited effectiveness in reducing operating noise or employ complex optimized structures (e.g., a large number of impeller blades).

[0003] Therefore, the applicant hopes to find a technical solution to improve the above-mentioned technical problems. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a moving impeller for a fan and the fan thereof, which can significantly reduce the operating noise of the fan.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A fan impeller includes an upper impeller disc and a lower impeller disc, which are respectively spaced apart vertically; wherein,

[0007] The center of the upper end plate of the impeller is provided with an air inlet for the impeller;

[0008] The lower end plate of the moving impeller is fixedly connected to the output shaft of the fan motor;

[0009] Between the upper and lower end plates of the impeller, there are several impeller blades arranged in an arc shape, and an impeller outlet is formed between the outer sides of adjacent impeller blades; the inner side of each impeller blade is provided with an air guide structure close to the impeller inlet, and the air inlet angle of the air guide structure is set to 95-100°, preferably 96-99.5°, and more preferably 96-99°.

[0010] Preferably, the air inlet angle of each impeller blade is equal.

[0011] Preferably, the air guide structure is planar, and the angle between the plane and the axis of the impeller inlet is the air inlet angle of the air guide structure.

[0012] Preferably, the width of the plane is used as the length of the air guide line of the air guide structure, and the length of the air guide line is set to 0.8-1.5mm, preferably 1-1.5mm.

[0013] Preferably, the curvature of each impeller blade is an arc shape with a radius of 13-15 mm.

[0014] Preferably, each impeller blade and its corresponding air guide structure are integrally formed.

[0015] Preferably, the upper end of each impeller blade is in contact with the upper end plate of the impeller, and its lower end is in contact with the lower end plate of the impeller.

[0016] Preferably, the number of blades in the moving impeller is 10-14, and more preferably 11-13.

[0017] Preferably, the diameter of the impeller inlet is 18-22 mm; and / or the impeller outlets are circumferentially spaced, with a circumferential diameter of 30-34 mm; and / or the air guiding structure of each impeller blade is circumferentially spaced, with a circumferential diameter of 15-19 mm.

[0018] A fan includes a movable impeller, the outer periphery of which is rotatably mounted with a movable impeller cover, and the movable impeller is fixedly connected to the output shaft of a fan motor as a single unit; wherein, the movable impeller is a type of fan impeller as described above.

[0019] This application proposes to provide an air guide structure on the inner side of each impeller blade, close to the air inlet of the impeller, and set its air inlet angle to 95-100°, preferably 96-99.5°, more preferably 96-99°. At the same time, in conjunction with the arc shape distribution design of the impeller blades (the radius of the arc is preferably set to 13-15mm), the pulsation of the airflow in the fan at high speed can be reduced, thereby reducing the airflow pressure fluctuation and thus significantly reducing the operating noise of the fan.

[0020] Based on the above technical solutions, this application further proposes a specific preferred design for the number of impeller blades (10-14 blades, more preferably 11-13 blades), which can distribute the airflow load and reduce eddy noise; at the same time, it increases the frequency of the impeller blades, cancels some harmonic noise, and disperses the noise energy to a higher frequency band (the area less sensitive to human ears), further avoiding the generation of sharp and high-pitched noise by the fan during operation, and further improving the user experience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the moving impeller of the fan according to a specific embodiment of this utility model;

[0022] Figure 2 yes Figure 1 A top-view structural diagram;

[0023] Figure 3 yes Figure 1 A schematic diagram of the side structure;

[0024] Figure 4 yes Figure 3 Sectional view along the AA direction. Detailed Implementation

[0025] This utility model discloses a moving impeller for a fan, including an upper impeller disc and a lower impeller disc arranged at intervals. The upper impeller disc has an air inlet at its center. The lower impeller disc is fixedly connected to the output shaft of the fan motor. A plurality of arc-shaped moving impeller blades are arranged between the upper and lower impeller discs, with an air outlet formed between the outer sides of adjacent blades. Each impeller blade has an air guide structure near the air inlet, with the air inlet angle of the air guide structure set to 95-100°, preferably 96-99.5°, and more preferably 96-99°.

[0026] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0027] Please see Figure 1 , Figure 2 , Figure 3 and combined Figure 4As shown, a fan impeller 1 includes an upper impeller disc 11 and a lower impeller disc 12, which are respectively spaced vertically. The upper impeller disc 11 has an air inlet 13 at its center. The lower impeller disc 12 is fixedly connected to the output shaft of the fan motor (common knowledge, not shown in the figure). A plurality of arc-shaped impeller blades 14 are arranged between the upper and lower impeller discs 11 and 12, and an air outlet 15 is formed between the outer sides of adjacent impeller blades 14. Each impeller blade 14 has a recess near its inner side. The air guide structure 16 of the impeller inlet 15 has an air inlet angle α of 95-100°, preferably 96-99.5°, more preferably 96-99°, and more specifically preferably, in this embodiment, the air inlet angle α of the air guide structure 16 is set to 98-99°; preferably, in this embodiment, the air guide structure 13 is planar, and the angle between the planar surface and the axis of the impeller inlet is taken as the air inlet angle α of the air guide structure 16 (that is, the air inlet angle α of the impeller blade 14 corresponding to the air guide structure 16).

[0028] Preferably, in this embodiment, the air inlet angle α of each moving impeller blade 14 is equal.

[0029] Preferably, in this embodiment, the width of the plane is used as the guide line length l of the air guide structure 16, and the guide line length l is set to 0.8-1.5mm, more preferably 1-1.5mm.

[0030] Preferably, in this embodiment, the curvature of each moving impeller blade 14 is an arc shape, and the radius R of the arc is 13-15mm.

[0031] Preferably, in order to further improve the air intake and air guiding effect and the processing and forming, in this embodiment, each moving impeller blade 14 and its corresponding air guiding structure 16 are integrally formed.

[0032] Preferably, in this embodiment, the upper end (including at least most of the upper region) of each impeller blade 14 is in contact with the upper end plate 11 of the impeller, and its lower end is in contact with the lower end plate 12 of the impeller; in order to further facilitate the air guiding effect, in this embodiment, the air guiding structure 16 is not in contact with the upper end plate 11 of the impeller.

[0033] Preferably, in this embodiment, the number of moving impeller blades 14 is 10-14, more preferably 11-13; specifically, preferably, in this embodiment, the number of moving impeller blades 14 is 11.

[0034] Preferably, in this embodiment, the diameter d13 of the impeller inlet 13 ranges from 18 to 22 mm; and / or preferably, in this embodiment, the impeller outlets 15 are circumferentially spaced, and the circumferential diameter d15 of the impeller outlets ranges from 30 to 34 mm; and / or preferably, in this embodiment, the air guiding structures 16 of the impeller blades 14 are circumferentially spaced, and the circumferential diameter d16 of the air guiding structures ranges from 15 to 19 mm.

[0035] This embodiment also proposes a fan, including a moving impeller, with a moving impeller cover mounted on the outer periphery of the moving impeller for relative rotation, and the moving impeller is fixedly connected to the output shaft of the fan motor as a whole; wherein, the moving impeller adopts the moving impeller 1 of the fan according to the above embodiment.

[0036] This application proposes to provide an air guide structure 16 on the inner side of each impeller blade 14, close to the impeller inlet 15, with the inlet angle α set to 95-100°, preferably 96-99.5°, more preferably 96-99°. Simultaneously, in conjunction with the arc-shaped distribution design of the impeller blades 14 (the radius of the arc is preferably set to 13-15mm), this can reduce the pulsation of the airflow during high-speed flow, thereby reducing airflow pressure fluctuations and significantly reducing the operating noise of the fan. Experiments have confirmed that the fan using the impeller design provided in this embodiment... The average operating noise level is reduced by at least 3-5 dB(A) compared to the prior art products before optimization. This application further preferably proposes a specific optimized design for the number of impeller blades 14 (10-14 blades, more preferably 11-13 blades), which can distribute the airflow load and reduce eddy noise. At the same time, it increases the frequency of the impeller blades, cancels some harmonic noise, and disperses the noise energy to a higher frequency band (the area less sensitive to human ears), further avoiding the generation of sharp and high-pitched noise in the fan during operation, and further improving the user experience.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment includes only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A moving impeller for a fan, characterized in that, This includes an upper impeller disc and a lower impeller disc, which are respectively arranged at intervals between the upper and lower parts of the impeller; wherein, The center of the upper end plate of the impeller is provided with an air inlet for the impeller; The lower end plate of the moving impeller is fixedly connected to the output shaft of the fan motor; Between the upper and lower end plates of the impeller, there are several impeller blades arranged in an arc shape, and an impeller outlet is formed between the outer sides of adjacent impeller blades; an air guide structure is provided on the inner side of each impeller blade near the impeller air inlet, and the air inlet angle of the air guide structure is set to 95-100°.

2. The impeller of the fan according to claim 1, characterized in that, The air inlet angle of the air guide structure is set to 96-99.5°.

3. The impeller of the fan according to claim 1, characterized in that, The air inlet angle of the air guide structure is set to 96-99°.

4. The impeller of the fan according to claim 1, characterized in that, The air inlet angle of each impeller blade is equal.

5. The impeller of the fan according to claim 1, characterized in that, The air guide structure is planar, and the angle between the plane and the axis of the impeller inlet is the air inlet angle of the air guide structure.

6. The impeller of the fan according to claim 5, characterized in that, The width of the plane serves as the length of the air guide line of the air guide structure, and the length of the air guide line is set to 0.8-1.5mm.

7. The impeller of the fan according to claim 6, characterized in that, The length of the air guide wire is set to 1-1.5mm.

8. The impeller of the fan according to claim 1, 5, or 6, characterized in that, The blades of each impeller are curved in an arc shape with a radius of 13-15 mm.

9. The impeller of the fan according to claim 1, 5, or 6, characterized in that, Each impeller blade and its corresponding air guide structure are integrally formed.

10. The moving impeller of the fan according to claim 1, characterized in that, The upper end of each impeller blade is in contact with the upper end plate of the impeller, and its lower end is in contact with the lower end plate of the impeller.

11. The impeller of the fan according to claim 1, characterized in that, The number of blades in the impeller is 10-14.

12. The impeller of the fan according to claim 1, characterized in that, The number of blades in the impeller is 11-13.

13. The impeller of the fan according to claim 1, characterized in that, The diameter of the impeller inlet is 18-22 mm; and / or the impeller outlets are circumferentially spaced, with a circumferential diameter of 30-34 mm; and / or the air guiding structure of the impeller blades is circumferentially spaced, with a circumferential diameter of 15-19 mm.

14. A fan, comprising a movable impeller, wherein a movable impeller cover is rotatably mounted on the outer periphery of the movable impeller, and the movable impeller is fixedly connected to the output shaft of a fan motor as a single unit; characterized in that, The moving impeller is the moving impeller of the fan according to any one of claims 1-13.

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