Noise reduction fan blade structure

Abstract

The utility model relates to a noise reduction fan blade structure, which belongs to the technical field of noise reduction fan blades, and comprises a mounting ring, a first noise reduction blade is fixed on the outer side of the mounting ring, a noise reduction mechanism for improving the noise reduction effect of a fan is arranged on the first noise reduction blade, and the noise reduction mechanism comprises a first mute ring. The first mute ring is fixed to the inner side of the first noise reduction blade, a first noise reduction block is fixed to the upper surface of the first mute ring, and a second mute ring is fixed to the lower surface of the first noise reduction blade. According to the noise reduction fan blade structure, through cooperation of the first noise reduction blades and the second noise reduction blades, the blades of the fan blades are distributed more densely, so that when the fan blades rotate, airflow gathered at the position of the first mute ring can be dispersed, the pressure at the position of the first mute ring is reduced, noise is reduced, through cooperation of the first noise reduction blocks and the second noise reduction blocks, the noise reduction effect is better, and the noise reduction effect is better. And the dispersed air flow can be secondarily dispersed, so that the noise reduction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction fan blades, in particular to a noise reduction fan blade structure. Background Art

[0002] Low-noise fans effectively reduce the noise during fan operation by optimizing fan blade design, reducing motor speed, and using sound-absorbing materials, allowing users to enjoy a quiet and comfortable living environment.

[0003] For example, China Utility Model Patent Publication No. (CN220081793U) discloses an airfoil noise reduction fan blade, which includes a connecting disk, a connecting ring is sleeved on the connecting disk, a plurality of blades are evenly spaced on the outer ring of the connecting ring, the distal ends of the plurality of blades are connected by a silent ring, and airfoil noise reduction blocks are evenly spaced on one side of the silent ring, the same number as the plurality of blades, and the airfoil noise reduction block is located in the middle of two adjacent blades. This utility model solves the problem that when the airflow enters the fan, a strong pressure field is formed between the blades. When the airflow is large enough, the pressure in the area away from the fan blades will also increase, which will affect the airflow velocity and generate greater noise. However, after the noise reduction fan blades are improved in this patent, the noise can only be reduced by 2% compared with ordinary fan blades. The noise reduction effect is poor during actual use, affecting practicality. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a noise reduction fan blade structure, which has the advantage of improving the noise reduction effect. It solves the problem that after the noise reduction fan blade is improved, the noise can only be reduced by 2% compared with ordinary fan blades, and the noise reduction effect is poor during actual use, affecting the practicality.

[0005] To achieve the above object, the utility model provides the following technical solutions: a noise reduction fan blade structure, comprising a mounting ring, a first noise reduction blade is fixed to the outer side of the mounting ring, and a noise reduction mechanism for improving the noise reduction effect of the fan is arranged on the first noise reduction blade;

[0006] The noise reduction mechanism includes a first silent ring, which is fixed to the inner side of a first noise reduction blade, a first noise reduction block is fixed to the upper surface of the first silent ring, a second silent ring is fixed to the lower surface of the first noise reduction blade, a second noise reduction block is fixed to the upper surface of the second silent ring, a second noise reduction blade is fixed to the upper surface of the second silent ring, and the inner side of the second noise reduction blade is fixed to the first silent ring.

[0007] Furthermore, a connecting ring is fixed on the upper surface of the mounting ring, and the inner diameter of the connecting ring is smaller than the inner diameter of the mounting ring.

[0008] Furthermore, the shape of the first noise reduction blade is spoon-shaped, and the height of the first noise reduction blade on a side close to the mounting ring is smaller than the height of the first noise reduction blade on a side away from the mounting ring.

[0009] Furthermore, the number of the first noise reduction blades is not less than two, and they are symmetrically distributed around the central axis of the mounting ring.

[0010] Furthermore, the number of the second noise reduction blades is not less than two, and they are symmetrically distributed around the central axis of the mounting ring.

[0011] Furthermore, the number of the first noise reduction blocks is not less than two and they are symmetrically distributed around the central axis of the mounting ring; the second noise reduction blades and the first noise reduction blocks are located between two adjacent first noise reduction blades and are distributed at intervals.

[0012] Furthermore, the number of the second noise reduction blocks is equal to the number of the first noise reduction blocks, and the positions correspond one to one.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The noise reduction fan blade structure makes the fan blades more densely distributed through the cooperation of the first noise reduction blade and the second noise reduction blade, so that when the fan blade rotates, the airflow gathered at the first silent ring can be dispersed, so that the pressure at the first silent ring is reduced to reduce noise. Through the cooperation of the first noise reduction block and the second noise reduction block, the dispersed airflow can be dispersed for the second time, thereby improving the noise reduction effect.

[0015] 2. The noise reduction fan blade structure can conveniently connect the fan blade to the fan through the cooperation of the connecting ring, making the installation of the fan blade more convenient. Through the cooperation of the first silent ring and the second silent ring, the first noise reduction blade and the second noise reduction blade can be conveniently supported, so that the first noise reduction blade and the second noise reduction blade can maintain stability when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the noise reduction mechanism of the utility model;

[0018] Figure 3 It is a rear view of the noise reduction mechanism of the utility model.

[0019] In the figure: 1 mounting ring, 2 first noise reduction blade, 3 noise reduction mechanism, 301 first silent ring, 302 first noise reduction block, 303 second silent ring, 304 second noise reduction block, 305 second noise reduction blade, 4 connecting ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 A noise reduction fan blade structure in this embodiment includes a mounting ring 1, and a first noise reduction blade 2 is fixed on the outer side of the mounting ring 1. After the fan blade is installed on the fan, the fan motor drives the mounting ring 1 to rotate, and the mounting ring 1 drives the first noise reduction blade 2 to rotate. The position of the first noise reduction blade 2 away from the mounting ring 1 is the area with maximum flow field pressure. The first noise reduction blade 2 rotates to divide the pressure and speed up the area with maximum flow field pressure. The first noise reduction blade 2 is provided with a noise reduction mechanism 3 for improving the noise reduction effect of the fan, thereby improving the noise reduction effect of the fan blade.

[0022] Among them, a connecting ring 4 is fixed on the upper surface of the mounting ring 1, and the inner diameter of the connecting ring 4 is smaller than the inner diameter of the mounting ring 1, which is convenient for installing and connecting the fan blades and the fan. The first noise reduction blade 2 is spoon-shaped, and the height of the first noise reduction blade 2 close to the mounting ring 1 is smaller than the height of the first noise reduction blade 2 away from the mounting ring 1. After the airflow passes through the surface of the first noise reduction blade 2, the pressure decreases and the flow rate increases, and potential energy is collected at the tail end, so that the first noise reduction blade 2 can generate greater wind force when rotating, and can reduce the noise generated when the fan blades rotate. The number of the first noise reduction blades 2 is not less than two, and they are symmetrically distributed around the central axis of the mounting ring 1 to increase the wind force when the fan blades rotate.

[0023] See also Figures 2 to 3In order to improve the noise reduction effect of the fan blades, the noise reduction mechanism 3 in this embodiment includes a first silent ring 301, the first silent ring 301 is fixed to the inner side of the first noise reduction blade 2, and a first noise reduction block 302 is fixed to the upper surface of the first silent ring 301. When the airflow flows through the surface of the first noise reduction blade 2, the first noise reduction block 302 disperses the airflow to avoid excessive air pressure on the first silent ring 301, thereby increasing the flow rate of the airflow and reducing the noise. A second silent ring 303 is fixed to the lower surface of the first noise reduction blade 2, and a second noise reduction block 304 is fixed to the upper surface of the second silent ring 303. After the airflow is dispersed, The first noise reduction blade 2 continues to flow close to one end of the mounting ring 1, and the second noise reduction block 304 disperses the airflow for a second time, so that the flow rate of the airflow is further increased, and the noise generated is also further reduced, which helps to improve the noise reduction effect of the fan blades. The second noise reduction blade 305 is fixed to the upper surface of the second silent ring 303, and the inner side of the second noise reduction blade 305 is fixed to the first silent ring 301. The first silent ring 301 and the second silent ring 303 support and fix the first noise reduction blade 2 and the second noise reduction blade 305, so that the first noise reduction blade 2 and the second noise reduction blade 305 remain stable during rotation.

[0024] In this example, the number of second noise reduction blades 305 is not less than two, and they are symmetrically distributed around the central axis of the mounting ring 1. The number of first noise reduction blocks 302 is not less than two, and they are symmetrically distributed around the central axis of the mounting ring 1. The second noise reduction blades 305 and the first noise reduction blocks 302 are located between two adjacent first noise reduction blades 2 and are distributed at intervals. The number of second noise reduction blocks 304 is equal to the number of first noise reduction blocks 302, and their positions correspond one to one. The second noise reduction blades 305 and the first noise reduction blocks 302 are distributed in coordination with the first noise reduction blades 2 to improve the noise reduction performance of the fan blades.

[0025] The working principle of the above embodiment is:

[0026] (1) After the fan blades are installed on the fan, the fan motor drives the mounting ring 1 to rotate, and the mounting ring 1 drives the first noise reduction blade 2 to rotate. The position of the first noise reduction blade 2 away from the mounting ring 1 is the area with the maximum flow field pressure. The first noise reduction blade 2 rotates to divide the pressure and increase the speed of the area with the maximum flow field pressure. After the airflow passes through the surface of the first noise reduction blade 2, the pressure decreases and the flow velocity increases. Potential energy is collected at the tail end, so that the first noise reduction blade 2 can generate a larger wind force when rotating, and can reduce the noise generated by the rotation of the fan blade.

[0027] (2) When the airflow flows through the surface of the first noise reduction blade 2, the first noise reduction block 302 disperses the airflow to prevent excessive air pressure on the first silent ring 301, thereby increasing the flow rate of the airflow and reducing the noise. After the airflow is dispersed, the first noise reduction blade 2 continues to flow close to one end of the mounting ring 1. The second noise reduction block 304 disperses the airflow for a second time, so that the flow rate of the airflow is further increased and the noise generated is further reduced, which helps to improve the noise reduction effect of the fan blades. The second noise reduction blades 305 can cooperate to disperse the airflow to reduce the noise generated by the fan blades.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A noise reduction fan blade structure, comprising a mounting ring (1), characterized in that: A first noise reduction blade (2) is fixed to the outer side of the mounting ring (1), and a noise reduction mechanism (3) for improving the noise reduction effect of the fan is arranged on the first noise reduction blade (2); The noise reduction mechanism (3) comprises a first silent ring (301), the first silent ring (301) is fixed to the inner side of a first noise reduction blade (2), a first noise reduction block (302) is fixed to the upper surface of the first silent ring (301), a second silent ring (303) is fixed to the lower surface of the first noise reduction blade (2), a second noise reduction block (304) is fixed to the upper surface of the second silent ring (303), a second noise reduction blade (305) is fixed to the upper surface of the second silent ring (303), and the inner side of the second noise reduction blade (305) is fixed to the first silent ring (301).

2. A noise reduction fan blade structure according to claim 1, characterized in that: A connecting ring (4) is fixed on the upper surface of the mounting ring (1), and the inner diameter of the connecting ring (4) is smaller than the inner diameter of the mounting ring (1).

3. The noise reduction fan blade structure according to claim 1, characterized in that: The first noise reduction blade (2) is spoon-shaped, and the height of the first noise reduction blade (2) on the side close to the mounting ring (1) is smaller than the height of the first noise reduction blade (2) on the side away from the mounting ring (1).

4. The noise reduction fan blade structure according to claim 1, characterized in that: The number of the first noise reduction blades (2) is not less than two, and they are symmetrically distributed around the central axis of the mounting ring (1).

5. A noise reduction fan blade structure according to claim 4, characterized in that: The number of the second noise reduction blades (305) is not less than two, and they are symmetrically distributed around the central axis of the mounting ring (1).

6. A noise reduction fan blade structure according to claim 5, characterized in that: The number of the first noise reduction blocks (302) is not less than two and they are symmetrically distributed around the central axis of the mounting ring (1); the second noise reduction blades (305) and the first noise reduction blocks (302) are located between two adjacent first noise reduction blades (2) and are spaced apart.

7. A noise reduction fan blade structure according to claim 6, characterized in that: The number of the second noise reduction blocks (304) is equal to the number of the first noise reduction blocks (302), and the positions correspond one to one.

Images