Mute cooling fan with large air volume

Abstract

The utility model relates to the technical field of fans, and discloses a large-air-volume and mute cooling fan which comprises a motor and fan blades, the fan blades comprise a rotating disc and a plurality of blades evenly distributed on the periphery of the rotating disc, and the motor comprises a front cover, a rear cover, a motor shell, a sealing damping ring, a rotor and a stator. The inclination angle range of the blades relative to the rotating disc is 28-32 degrees, the sides, facing the rotating direction, of the multiple blades are provided with inwards-concave arc-shaped structures, the arc angle range of the inwards-concave arc-shaped structures is 8-10 degrees, the front cover is connected with the front end of the motor shell through a sealing damping ring, and the rear cover is connected with the rear end of the motor shell. The rear end of the rotor is installed on the rear cover through a bearing, the front end of the rotor penetrates through the front cover and extends outwards, and the front end of the rotor is connected with the rotating disc. According to the utility model, the noise generated during the operation of the motor is reduced, the mute requirement is met, the air can be effectively cut, and the air flowing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fan, especially a heat dissipation fan with large air volume and silence. BACKGROUND

[0002] The silent motor and high air volume fan blade combination supporting equipment are smaller in size and weight than ordinary motors and fan blades, so that the motor and fan blade are easier to install and maintain. The traditional motor does not have a silent structure, so that the fan often generates a large noise when running, and the design of the fan blade is unreasonable, so that the air volume of the fan is also limited. Therefore, it is of great practical significance to develop a motor and fan blade combination that is both silent and high in air volume. SUMMARY

[0003] The utility model discloses a heat dissipation fan with large air volume and silence has been provided to overcome the defects in the prior art.

[0004] The utility model discloses a heat dissipation fan with large air volume and silence includes motor and fan blade, the fan blade includes the rotating disc and the even distribution of the plurality of blades in the rotating disc outer periphery, the motor includes the front cover, the back cover, the motor shell, the sealed shock attenuation ring, the rotor and the stator, the plurality of the blade is equipped with the concave arc structure to the side of the rotating direction, the arc angle range of the concave arc structure is 8~10 DEG, the stator is installed in the inner wall of the motor shell, the front cover is connected with the front end of the motor shell through the sealed shock attenuation ring, the back cover is connected with the rear end of the motor shell, the rear end of the rotor is installed in the back cover through the bearing, the front end of the rotor passes through the front cover and is outward and explores, the front end of the rotor is connected with the rotating disc, the surface of the motor shell is coated with sound insulation damping coating. The utility model discloses the motor when operating reduces the noise and the fan blade improves the air volume.

[0005] More preferably, the blade and the rotating disc are integrally formed. Integrally forming the fan blade can avoid loosening of the bolt and the welded part during high-strength operation, which may cause the blade to fall off and pose a danger.

[0006] More preferably, the fan blade is made of cast iron. The fan blade is made of cast iron, so as to withstand the centrifugal force generated by high-speed rotation, and the cast iron surface is wear-resistant, which can reduce wear caused by friction between the fan blade and particulate matter and prolong the service life.

[0007] More preferably, the heat dissipation fan further comprises a temperature sensor connected to the motor.

[0008] More preferably, the stator comprises a coil winding and a stator core, and the coil winding is installed on the inner side of the motor shell through the stator core.

[0009] A better option is that the rotor includes a rotating shaft and permanent magnets, the rear end of the rotating shaft is mounted to the rear cover via a bearing, the front end of the rotating shaft passes through the front cover and is connected to the turntable, and the permanent magnets are all sleeved in the middle of the rotating shaft.

[0010] A better option is that the turntable includes a disc and a bushing, the bushing is installed at the center of the disc and connected to the rotor, and the circumference of the disc is connected to the plate.

[0011] A further preferred option is that the turntable also includes reinforcing ribs, with both ends of the reinforcing ribs connected to the disc and the bushing, respectively. The reinforcing ribs enhance the strength of the fan blades.

[0012] A more preferred option is that the relative angle between the blades is 90°; and the tilt angle of the blades relative to the turntable is in the range of 28° to 32°.

[0013] This utility model has the following advantages and beneficial effects compared to the prior art:

[0014] The motor housing and sealing shock-absorbing ring coated with sound-insulating and damping coating of this utility model reduce the noise generated during motor operation, achieving the requirement of quiet operation. The fan blade has a concave arc structure that can effectively cut the air and improve airflow efficiency, thereby increasing the air volume. The fan blade adopts an integrated molding process, which can avoid the loosening of bolts and welded parts during high-intensity operation, which could lead to the fan blade falling off and causing danger. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a cooling fan with large air volume and quiet operation according to this utility model;

[0016] Figure 2 This is a schematic diagram of the fan blades of a cooling fan with large air volume and quiet operation according to this utility model.

[0017] Figure 3 This is a schematic diagram of the fan blades of a cooling fan with large air volume and quiet operation according to this utility model.

[0018] Figure 4 This is an exploded view of the motor of a cooling fan with large air volume and quiet operation according to this utility model.

[0019] Figure 5 This is a schematic diagram of the fan blades (arrows indicate the direction of rotation of the fan blades) of a cooling fan with large air volume and quiet operation according to this utility model.

[0020] The components in the attached diagram are labeled as follows: 1-fan blade; 11-blade; 12-turntable; 121-reinforcing rib; 122-shaft sleeve; 123-disc; 2-motor; 201-front cover; 202-sealing shock absorber ring; 203-stator; 204-permanent magnet; 205-shaft; 206-bearing; 207-temperature sensor; 208-motor housing; 209-rear cover. Detailed Implementation

[0021] The utility model objective of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation of this utility model is not limited to the following embodiments.

[0022] like Figure 1 and 4 As shown, a cooling fan with high airflow and quiet operation includes a motor 2, fan blades 1, and a temperature sensor 207. The fan blades 1 are connected to the shaft 205 of the motor 2. The temperature sensor 207 is installed at the center of the rear cover 209 of the motor 2, corresponding to the rear end of the rotor shaft 205. The motor 2 includes a front cover 201, a rear cover 209, a motor housing 208, a sealing damping ring 202, a rotor, and a stator 203. One side of the sealing damping ring 202 is glued to the motor housing 208, and the other side of the sealing damping ring 202 is connected to the front cover 201. Screws pass through the front cover 201 and the sealing damping ring 202 in sequence and are connected to the front end of the motor housing 208. The rear cover 209 is connected to the rear end of the motor housing 208 by screws. The stator 203 is installed on the inner wall of the motor housing 208. A bearing 206 is provided on the inner side of the rear cover 209, and the rear end of the rotor is connected to the bearing 206. The front end of the rotor is rotatably connected to the front cover 201 and extends outward through the front cover 201. The front end of the rotor is connected to the fan blade 1 through a rubber bearing, which reduces the transmission of fan blade vibration and noise. The rotor and stator 203 are matched to each other.

[0023] Motor 2 provides power for the rotation of fan blade 1. Fan blade 1 is made of cast iron, which improves airflow efficiency and increases air volume, thereby improving the practicality and heat dissipation of the equipment. Temperature sensor 207 can control the operation of motor 2 according to the equipment temperature, thereby controlling the operation of the fan and improving the service life and safety of motor 2. Front cover 201 and rear cover 209 are both used to install shaft 205. Sealing damping ring 202 is made of nitrile rubber, TPU (thermoplastic polyurethanes), or fluororubber. In this embodiment, fluororubber is preferred, which can effectively reduce vibration and noise generated during operation and improve the operating efficiency and reliability of motor 2. Rotor is used to generate induced electromotive force and current to realize energy conversion. Stator 203 is used to generate rotating magnetic field. Motor housing 208 is made of die-cast aluminum metal, and then a sound-insulating and damping coating is sprayed on the surface of the die-cast housing, which plays a role in isolating the internal noise of motor 2 and protecting internal components. Sound-damping coating is a special coating mainly used to reduce vibration and noise. It is usually made of polymer resin with appropriate fillers and auxiliary materials.

[0024] like Figure 4 As shown, the rotor includes a shaft 205 and a permanent magnet 204. The rear end of the shaft 205 is mounted at the center of the rear cover 209 via a bearing 206, and the front end of the shaft 205 passes through the center of the front cover 201 and extends outward. The shaft 205 rotates relative to the front cover 201. The end of the shaft 205 is connected to the fan blade 1. The permanent magnet 204 is sleeved on the middle of the shaft 205. The stator 203 includes a coil winding and a stator core. The coil winding is wound on the stator core, and the stator core is mounted inside the motor housing 208.

[0025] like Figure 2 , 3 As shown in Figure 5, the fan blade 1 includes four blades 11 and a turntable 12. The four blades 11 are evenly distributed on the outer circumference of the turntable 12, and the included angle between two adjacent blades 11 is 90°. The blades 11 are inclined, and the inclination angle of the blades 11 relative to the turntable 12 ranges from 28° to 32°, with an optimal inclination angle of 30°. Each blade 11 has a concave arc-shaped structure on the side facing the rotation direction, and the arc angle of the concave arc-shaped structure ranges from 8° to 10°, with an optimal arc angle of 10°. The turntable 12 includes a disc 123, four reinforcing ribs 121, and a bushing 122. The bushing 122 is installed on the rear side of the center of the disc 123. The end of the rotor shaft 205 is sleeved inside the bushing 122. The four sides of the bushing 122 are connected to one end of the reinforcing ribs 121, and the bottom and the other end of the reinforcing ribs 121 are connected to the inner side of the disc 123.

[0026] Operating Procedure: During operation, motor 2 is first started. Temperature sensor 207 monitors temperature changes in real time, thereby controlling the stopping and starting of motor 2. The motor housing 208, coated with a sound-insulating and damping layer, and its internal sealed shock-absorbing ring 202 further reduce noise during operation. When motor 2 is started, the permanent magnet 204 of the rotor generates a radial magnetic field, and the stator 203 generates a rotating magnetic field. The magnetic fields of the rotor and stator 203 interact, generating an electromagnetic force. Under the influence of this electromagnetic force, the rotor accelerates and gradually approaches synchronous speed. Once the magnetic fields of the rotor and stator 203 reach equilibrium, motor 2 begins to run.

[0027] When using motor 2 and fan blade 1, to reduce the noise generated by motor 2 during operation and increase the airflow of fan blade 1, motor 2 adopts a brushless DC motor to reduce mechanical friction and noise. A sealed damping ring 202 is installed inside the motor to further reduce vibration and noise generated during operation. The motor housing 208 is coated with a sound-insulating damping coating to effectively isolate internal noise from motor 2. When using motor 2 and fan blade 1, to increase the fan's airflow for sufficient heat dissipation and ensure continuous operation, extending the equipment's lifespan, fan blade 1, with its concave arc structure, better cuts through the air and increases airflow. Fan blade 1 is manufactured using a one-piece die-casting process to prevent loosening during prolonged operation, thus avoiding safety hazards. If the combination of motor 2 and fan blade 1 cannot operate continuously for extended periods, it will lead to increased heat in the equipment. Low heat dissipation efficiency may cause the equipment's wiring to burn out or even cause a fire.

[0028] The above-described specific embodiments are preferred embodiments of this utility model and are not intended to limit this utility model. Any other changes or equivalent substitutions made without departing from the technical solution of this utility model are included within the protection scope of this utility model.

Claims

1. A cooling fan with high air volume and quiet operation, characterized in that: The device includes a motor (2) and fan blades (1). The fan blades (1) include a turntable (12) and multiple blades (11) evenly distributed around the outer periphery of the turntable (12). The motor (2) includes a front cover (201), a rear cover (209), a motor housing (208), a sealing shock-absorbing ring (202), a rotor, and a stator (203). The multiple blades (11) have a concave arc-shaped structure on the side facing the rotation direction. The arc angle of the concave arc-shaped structure is in the range of 8° to 10°. The stator (203) is mounted on the turntable. The inner wall of the motor housing (208) is provided with the front cover (201) connected to the front end of the motor housing (208) via the sealing damping ring (202), the rear cover (209) connected to the rear end of the motor housing (208), the rear end of the rotor mounted on the rear cover (209) via a bearing (206), the front end of the rotor passing through the front cover (201) and protruding outward, the front end of the rotor being connected to the turntable (12), and the surface of the motor housing (208) being coated with a sound-insulating damping coating.

2. The cooling fan with large air volume and quiet operation according to claim 1, characterized in that: The blade (11) and the turntable (12) are integrally formed.

3. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: The fan blades (1) are made of cast iron.

4. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: It also includes a temperature sensor (207), which is installed inside the motor (2).

5. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: The stator (203) includes a coil winding and a stator core, and the coil winding is mounted on the inside of the motor housing (208) through the stator core.

6. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: The rotor includes a rotating shaft (205) and permanent magnets (204). The rear end of the rotating shaft (205) is mounted on the rear cover (209) via a bearing (206). The front end of the rotating shaft (205) passes through the front cover (201) and is connected to the turntable (12). All permanent magnets (204) are sleeved on the middle part of the rotating shaft (205).

7. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: The turntable (12) includes a disc (123) and a bushing (122). The bushing (122) is installed at the center of the disc (123) and is connected to the rotor. The circumference of the disc (123) is connected to the blade (11).

8. A cooling fan with high air volume and quiet operation according to claim 7, characterized in that: The turntable (12) also includes a reinforcing rib (121), the two ends of which are connected to the disc (123) and the bushing (122) respectively.

9. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: The relative angle between the blades (11) is 90°.

10. A cooling fan with high air volume and quiet operation according to claim 1, characterized in that: The tilt angle of the blade (11) relative to the turntable (12) ranges from 28° to 32°.

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