A high-efficiency electronic fan with noise reduction

Abstract

The utility model discloses a kind of noise reduction high-efficiency electronic fan, including motor hub cover, outer ring and the fan blade between them, sawtooth structure is equipped in fan blade leading edge or trailing edge, be divided into the first sawtooth section of rotating forward direction and the second sawtooth section of back direction, and the tooth spacing, tooth depth, tooth angle of first sawtooth section are all greater than second sawtooth section.The utility model is based on the airflow intensity difference of both sides when fan blade rotates, different airflow characteristics are adapted through different sawtooth parameters, first sawtooth section high-efficiency broken high-impact airflow vortex, second sawtooth section adapts weak airflow, significantly weaken aerodynamic noise;While reducing airflow disturbance and separation loss, improve air volume and air pressure.Its structure is simple, without changing core component, processing adaptation existing technology, can be widely applied in many fields, give consideration to low noise and high efficiency, optimize use experience and strengthen heat dissipation capacity.

Description

Technical Field

[0001] This utility model relates to the field of electronic fan technology, specifically to a noise-reducing, high-efficiency electronic fan. Background Technology

[0002] As a core component of heat dissipation systems, electric fans are widely used in electronic devices, automobiles, home appliances and other fields. Their noise reduction performance and heat dissipation efficiency directly affect the user experience and operational stability of the equipment.

[0003] Existing electric fans improve performance by optimizing blade shape, angle, or material. However, at high speeds, the impact of the leading edge of the blades on the airflow and the vortices formed by airflow separation at the trailing edge still generate significant aerodynamic noise. Simultaneously, airflow disturbance reduces airflow and air pressure, limiting efficiency improvements. Especially in scenarios with stringent noise and heat dissipation requirements, such as precision electronic equipment, existing fans struggle to simultaneously meet the dual demands of low noise and high efficiency, necessitating a structural improvement solution to overcome this technological bottleneck. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a noise-reducing, high-efficiency electronic fan.

[0005] The technical solution adopted by this utility model is: a noise-reducing high-efficiency electronic fan, including a motor hub, an outer ring, and fan blades spaced between the hub and the outer ring. Each fan blade has a serrated structure at its leading and trailing edges. The serrated structure is divided into a first serrated segment on one side of the direction of rotation and a second serrated segment on the other side of the direction of rotation. The tooth spacing of the first sawtooth segment is greater than the tooth spacing of the second sawtooth segment; The tooth depth of the first sawtooth segment is greater than the tooth depth of the second sawtooth segment; The tooth angle of the first sawtooth segment is greater than the tooth angle of the second sawtooth segment.

[0006] Furthermore, the tooth spacing of the first sawtooth segment is 1.2 to 2.0 times that of the tooth spacing of the second sawtooth segment.

[0007] Furthermore, the tooth depth of the first serrated segment is 1.3 to 2.5 times the tooth depth of the second serrated segment.

[0008] Furthermore, the tooth angle of the first sawtooth segment is 1.3 to 2.0 times that of the tooth angle of the second sawtooth segment.

[0009] Furthermore, the fan blade has a gradually widening portion that gradually widens towards the outer ring side, and the gradually widening portion is rigidly connected to the inner wall of the outer ring.

[0010] Furthermore, a windproof ring is provided on the outer wall of the outer ring.

[0011] Furthermore, the tooth spacing of the first sawtooth segment is 10-13mm, and the tooth spacing of the second sawtooth segment is 3-5mm; The tooth depth of the first serrated segment is 7-9mm, and the tooth depth of the second serrated segment is 2-4mm; The tooth angle of the first sawtooth segment is 55-58°, and the tooth angle of the second sawtooth segment is 52-55°.

[0012] The beneficial effects of this utility model are: 1. Significant noise reduction and optimized user experience: The serrated structure at the leading or trailing edge of the fan blade can break up the large-scale vortices formed by airflow separation and transform them into small-scale vortices to reduce aerodynamic noise. At the same time, the first serrated section (in the direction of rotation and forward movement) adopts a larger tooth spacing, tooth depth and tooth angle to adapt to the stronger airflow impact intensity on that side and effectively weaken impact noise. The second serrated section adapts to the weaker airflow on the opposite side, forming differentiated noise reduction. The overall noise reduction effect is better than that of a uniform serrated structure.

[0013] 2. Improved performance and enhanced heat dissipation: The serrated structure reduces the impact and disturbance between the fan blades and the airflow, as well as the separation of the trailing edge airflow, thereby reducing airflow energy loss and increasing airflow and air pressure. The parameter differences between the first and second serrated sections match the airflow characteristics on both sides of the fan blades during rotation, avoiding airflow turbulence and further optimizing airflow efficiency, enabling the fan to output higher heat dissipation performance at the same power consumption.

[0014] 3. Simple structure, easy to implement and highly adaptable: Performance can be improved simply by setting serrated sections with differentiated parameters on the leading or trailing edge of the fan blades. There is no need to modify the core structure such as the motor hub sleeve and outer ring. The processing technology is simple and adaptable to existing production processes. It can be widely used in electronic fans in different fields, with outstanding practicality and promotion potential.

[0015] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the relationship between teeth.

[0019] Figure 1-2 In the middle: 1. Motor hub sleeve; 2. Outer ring; 3. Fan blade; 4. First sawtooth section; 5. Gradually widening section; 6. Windshield ring; 7. Second sawtooth section. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] This invention provides a noise-reducing, high-efficiency electronic fan.

[0023] In this embodiment, refer to Figures 1-2 The noise-reducing, high-efficiency electronic fan includes a motor hub 1, an outer ring 2, and fan blades 3 spaced between the hub and the outer ring. Each fan blade 3 has a serrated structure at its leading and trailing edges. The serrated structure is divided into a first serrated segment 4 located on one side of the rotational forward direction and a second serrated segment 7 located on the other side of the rotational reverse direction. The tooth spacing of the first sawtooth segment is greater than the tooth spacing of the second sawtooth segment; The tooth depth of the first sawtooth segment is greater than the tooth depth of the second sawtooth segment; The tooth angle of the first sawtooth segment is greater than the tooth angle of the second sawtooth segment.

[0024] In the above technical solution, based on the differentiated airflow characteristics of "high airflow impact intensity on the forward rotating side and weak airflow intensity on the reverse rotating side" when the fan blade rotates, the serrated structure of the leading / trailing edge of the fan blade is designed as a first serrated section (for the forward rotating side) and a second serrated section (for the reverse rotating side). The first serrated section, with its larger tooth spacing, tooth depth, and tooth angle, adapts to the breaking requirements of high-impact airflow, while the second serrated section, with its smaller parameters, adapts to weak airflow scenarios, achieving "differentiated airflow control." This improves noise reduction and increases the fan's energy efficiency ratio.

[0025] Specifically, the tooth spacing of the first sawtooth segment is 1.2 to 2.0 times that of the tooth spacing of the second sawtooth segment; the tooth depth of the first sawtooth segment is 1.3 to 2.5 times that of the tooth depth of the second sawtooth segment; and the tooth angle of the first sawtooth segment is 1.3 to 2.0 times that of the tooth angle of the second sawtooth segment.

[0026] In the above technical solution, under the condition that the first and second sawtooth segments meet the above structural requirements, a better noise reduction effect and energy saving effect can be achieved.

[0027] Specifically, the fan blade has a gradually widening portion 5 that gradually widens towards the outer ring side, and the gradually widening portion is rigidly connected to the inner wall of the outer ring.

[0028] In this embodiment, the gradually widening portion is fixedly connected to the inner wall of the outer ring, which strengthens the connection rigidity between the fan blade and the outer ring and reduces fan blade vibration during high-speed rotation.

[0029] Specifically, a windbreak ring 6 is provided on the outer wall of the outer ring.

[0030] In this embodiment, by setting a wind deflector ring, airflow leakage at the edge of the fan is effectively prevented, the air volume and air pressure generated by the fan are greatly increased, thereby enhancing the fan's heat dissipation capacity.

[0031] Specifically, the tooth spacing of the first serrated segment is 10-13mm, and the tooth spacing of the second serrated segment is 3-5mm; The tooth depth of the first serrated segment is 7-9mm, and the tooth depth of the second serrated segment is 2-4mm; The tooth angle of the first sawtooth segment is 55-58°, and the tooth angle of the second sawtooth segment is 52-55°.

[0032] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A noise-reducing, high-efficiency electronic fan, comprising a motor hub, an outer ring, and fan blades spaced apart between the hub and the outer ring, characterized in that: Each fan blade has a serrated structure at its leading and trailing edges. The serrated structure is divided into a first serrated segment on one side of the direction of rotation and a second serrated segment on the other side of the direction of rotation. The tooth spacing of the first sawtooth segment is greater than the tooth spacing of the second sawtooth segment; The tooth depth of the first sawtooth segment is greater than the tooth depth of the second sawtooth segment; The tooth angle of the first sawtooth segment is greater than the tooth angle of the second sawtooth segment.

2. The noise-reducing high-efficiency electronic fan according to claim 1, characterized in that: The tooth spacing of the first sawtooth segment is 1.2 to 2.0 times that of the tooth spacing of the second sawtooth segment.

3. The noise-reducing high-efficiency electronic fan according to claim 1, characterized in that: The tooth depth of the first serrated segment is 1.3 to 2.5 times the tooth depth of the second serrated segment.

4. The noise-reducing high-efficiency electronic fan according to claim 1, characterized in that: The tooth angle of the first sawtooth segment is 1.3 to 2.0 times that of the tooth angle of the second sawtooth segment.

5. The noise-reducing high-efficiency electronic fan according to claim 1, characterized in that: The fan blade has a gradually widening portion that gradually widens towards the outer ring side, and the gradually widening portion is rigidly connected to the inner wall of the outer ring.

6. The noise-reducing high-efficiency electronic fan according to claim 1, characterized in that: A windbreak ring is provided on the outer wall of the outer ring.

7. The noise-reducing high-efficiency electronic fan according to claim 1, characterized in that: The tooth spacing of the first sawtooth segment is 10-13mm, and the tooth spacing of the second sawtooth segment is 3-5mm; The tooth depth of the first serrated segment is 7-9mm, and the tooth depth of the second serrated segment is 2-4mm; The tooth angle of the first sawtooth segment is 55-58°, and the tooth angle of the second sawtooth segment is 52-55°.

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