Low-noise centrifugal fan

By designing a low-noise centrifugal fan including shock-absorbing and noise reduction mechanism, composite silencer sleeve and dust filter, the problem that existing fans cannot effectively reduce noise and adapt to special environments is solved, and lower noise and higher mobility are achieved and more flexible wind regulation effects.

CN222478995UActive Publication Date: 2025-02-14HEFEI SHENGBEN ELECTRONIC TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420891609.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-26
Publication Date
2025-02-14
Estimated Expiration
2034-04-26

AI Technical Summary

Technical Problem

The existing low-noise centrifugal fans cannot effectively eliminate the noise caused by internal mechanical collisions, and the air inlet lacks a device to block small particles, which causes noise and damage to the small particles to be involved in the fan blade in special environments. The fan is heavy and inconvenient to move, so it requires an instant power connection. , and the rotation speed and wind speed cannot be adjusted.

Method used

Designed a base, shock-absorbing and noise-reducing mechanism, outer frame housing, display control table, thrust rod, annular airway, turbofan, variable speed motor, air intake passage, dust filter, exhaust passage, and composite silencer sleeve and telescopic lock tube with low noise centrifugal fan. The device absorbs the impact caused by mechanical rotational displacement collision through multiple sets of shock absorbing pads. The composite silencer sleeve on the outside reduces internal noise generated by air vibration. The dust filter prevents small particles from entering. The variable speed motor can adjust the wind force size. The battery pack provides power without power. Energy in the environment.

Benefits of technology

It effectively reduces the noise generated by internal mechanical collisions, prevents small particles from damaging the device, improves the mobility and adaptability of the fan, can work normally in a power-free environment, and can adjust the wind force according to needs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan which comprises a base and a shock absorption and noise reduction mechanism, when the low-noise centrifugal fan works, a power source is turned on through a display console, a variable speed motor drives a turbofan to rotate, the rotating speed can be changed according to requirements so as to adjust the wind power, and a storage battery pack provides energy for the whole device. External air is sucked in through the air inlet channel, the dust filter screen prevents small particles from entering the device to be damaged, air is guided into the exhaust channel through the annular air channel, the composite silencing pipe sleeve on the outer side reduces internal noise generated by air vibration, the telescopic lock pipe is connected with an external pipeline, and the probability that sundries enter the device is reduced. According to the damping and noise reduction mechanism located on the lower portion, the fan body is fixed through a restraint frame, multiple sets of damping pads absorb impulsive force generated by mechanical rotation displacement collision, noise is prevented, and a steering roller and a thrust rod on the outer side of the device facilitate transfer of the device.
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Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan. Background Art

[0002] A centrifugal fan is a ventilation and air supply equipment widely used in multiple industries. It relies on input mechanical energy to increase gas pressure and deliver gas. It is a driven fluid machine. Based on the principle of converting kinetic energy into potential energy, it uses a high-speed rotating impeller to accelerate the gas, then slow down and change the flow direction, so that the kinetic energy is converted into potential energy (pressure). During use, the fan will generate loud noise due to air vibration or internal mechanical collision. Therefore, the development of low-noise centrifugal fans has become a new direction.

[0003] Most of the current low-noise centrifugal fans cannot eliminate the noise generated by internal mechanical collisions, and there is no device to block small particles at the air inlet, causing small particles to be drawn into the fan blades and collide when working in some special environments, damaging the device and generating loud noise. Centrifugal fans are usually very heavy and inconvenient to move, and require immediate power connection. They cannot overcome some power-free environments. Centrifugal fans cannot adjust the speed and wind force to meet different needs. Utility Model Content

[0004] The utility model proposes a low-noise centrifugal fan, which solves the problem that most of the current low-noise centrifugal fans cannot eliminate the noise generated by internal mechanical collisions, and the air inlet has no device to shield small particles, resulting in small particles being drawn into the fan blades and colliding when working in some special environments, damaging the device and generating relatively large noise. Centrifugal fans are usually very heavy and inconvenient to move, and require immediate power connection, and cannot overcome some power-free environments. The centrifugal fan cannot adjust the speed and wind force to adapt to different needs.

[0005] The technical solution of the utility model is as follows: it comprises a base and a shock-absorbing and noise-reducing mechanism, a steering roller is arranged at the bottom of the base, an outer frame shell is arranged at the top of the base, a display control console is arranged at the top of the outer frame shell, a thrust rod is arranged at one end of the outer frame shell, a shock-absorbing and noise-reducing mechanism is arranged at the bottom of the inner part of the outer frame shell, an air guide constraint frame is arranged at the top of the base, a first shock-absorbing pad is arranged at the top of the air guide constraint frame, a main body constraint frame is arranged at one side of the air guide constraint frame, a second shock-absorbing pad is arranged at the top of the main body constraint frame, and the second shock-absorbing pad is arranged at the bottom of the inner part of the outer frame shell. A third shock-absorbing pad is arranged above the shock pad, an annular air duct is arranged on one side of the third shock-absorbing pad, a turbo fan is arranged inside the annular air duct, a variable speed motor is arranged on one side of the annular air duct, an air intake channel is arranged on the other side of the annular air duct, a sealing cover is arranged on the other side of the air intake channel, a dust filter is arranged on the other side of the sealing cover, an exhaust channel is arranged at one end of the annular air duct, a composite silencer pipe sleeve is arranged on the outside of the exhaust channel, a telescopic lock tube is arranged on the other end of the exhaust channel, and a battery pack is arranged at one end of the variable speed motor.

[0006] Preferably, the base is spirally connected to the steering roller, four groups of steering rollers are provided, and the base is spirally connected to the outer frame shell.

[0007] Preferably, the outer frame shell and the display console are spirally connected, the outer frame shell and the thrust rod are welded, a battery pack is arranged above the base, and the base and the battery pack are welded.

[0008] Preferably, the base and the wind guide restraint frame are spirally connected, the wind guide restraint frame and the first shock-absorbing pad are adhesively connected, a main body restraint frame is arranged above the base, the base and the main body restraint frame are spirally connected, the main body restraint frame and the second shock-absorbing pad are adhesively connected, a third shock-absorbing pad is arranged on the inner side of the main body restraint frame, and the main body restraint frame and the third shock-absorbing pad are adhesively connected.

[0009] Preferably, the third shock-absorbing pad and the annular air duct are sleeve-connected, the annular air duct and the turbofan are spirally connected, and the annular air duct and the variable speed motor are spirally connected.

[0010] Preferably, the annular air duct and the air inlet channel are welded, the air inlet channel runs through one side of the outer frame shell, the air inlet channel and the sealing cover are spirally connected, and the sealing cover and the dust filter are connected by a slot.

[0011] Preferably, the annular air duct and the exhaust channel are welded, an exhaust channel is provided above the first shock-absorbing pad, the first shock-absorbing pad and the exhaust channel are sleeved, the exhaust channel and the composite silencer pipe sleeve are sleeved, and the exhaust channel and the telescopic lock tube are plugged.

[0012] The working principle and beneficial effects of the utility model are:

[0013] When the device is working, the power is turned on through the display console, and the variable speed motor drives the turbo fan to rotate. The speed can be changed according to demand to adjust the wind force. The battery pack provides energy for the entire device to work normally without external power supply. The outside air is sucked in through the air intake channel, and the dust filter prevents small particles from entering the device and damaging it. The air is introduced into the exhaust channel through the annular airway. The composite silencer sleeve on the outside reduces the internal noise caused by air vibration. The telescopic locking tube connects the external pipeline to reduce the chance of debris entering the inside. The shock-absorbing and noise-reducing mechanism located at the bottom fixes the fan body through a restraint frame. Multiple groups of shock-absorbing pads absorb the impact generated by the mechanical rotation, displacement and collision to prevent noise. The steering rollers and thrust rods on the outside of the device facilitate the transfer of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the centrifugal fan of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the centrifugal fan of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal side structure of the centrifugal fan of the utility model;

[0018] Figure 4 This is a schematic diagram of the vibration reduction and noise reduction mechanism of the utility model;

[0019] Numbers in the figure: 1. base; 2. steering roller; 3. outer frame shell; 4. display control console; 5. thrust rod; 6. shock-absorbing and noise-reducing mechanism; 601. wind guide restraint frame; 602. first shock-absorbing pad; 603. main body restraint frame; 604. second shock-absorbing pad; 605. third shock-absorbing pad; 7. annular air duct; 8. turbo fan; 9. variable speed motor; 10. air intake channel; 11. sealing cover; 12. dust filter; 13. exhaust channel; 14. composite silencer pipe sleeve; 15. telescopic lock tube; 16. battery pack. DETAILED DESCRIPTION

[0020] The following will be combined with 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 of 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-Figure 4 The utility model provides a technical solution for a low-noise centrifugal fan: it includes a base 1 and a shock-absorbing and noise-reducing mechanism 6, a steering roller 2 is arranged at the bottom of the base 1, an outer frame shell 3 is arranged above the base 1, a display control console 4 is arranged above the outer frame shell 3, a thrust rod 5 is arranged at one end of the outer frame shell 3, a shock-absorbing and noise-reducing mechanism 6 is arranged at the lower part of the inner part of the outer frame shell 3, an air guide constraint frame 601 is arranged above the base 1, a first shock-absorbing pad 602 is arranged above the air guide constraint frame 601, a main body constraint frame 603 is arranged on one side of the air guide constraint frame 601, a second shock-absorbing pad 604 is arranged above the main body constraint frame 603, and the first shock-absorbing pad 605 is arranged at the bottom of the inner part of the outer frame shell 3. A third shock-absorbing pad 605 is arranged above the second shock-absorbing pad 604, an annular air duct 7 is arranged on one side of the third shock-absorbing pad 605, a turbo fan 8 is arranged inside the annular air duct 7, a variable speed motor 9 is arranged on one side of the annular air duct 7, an air intake channel 10 is arranged on the other side of the annular air duct 7, a sealing cover 11 is arranged on the other side of the air intake channel 10, a dust filter 12 is arranged on the other side of the sealing cover 11, an exhaust channel 13 is arranged at one end of the annular air duct 7, a composite silencer pipe sleeve 14 is arranged on the outside of the exhaust channel 13, a telescopic lock tube 15 is arranged on the other end of the exhaust channel 13, and a battery pack 16 is arranged at one end of the variable speed motor 9.

[0022] When the device is working, the power is turned on through the display console 4, and the variable speed motor 9 drives the turbo fan 8 to rotate. The speed can be changed according to demand to adjust the wind force. The battery pack 16 provides energy for the entire device to work normally when there is no power supply outside. The outside air is sucked in through the air intake channel 10, and the dust filter 12 prevents small particles from entering the device and damaging it. The air is introduced into the exhaust channel 13 through the annular airway 7. The outer composite silencer pipe sleeve 14 reduces the internal noise generated by air vibration. The telescopic locking tube 15 connects the external pipeline to reduce the probability of internal entry of debris. The shock-absorbing and noise-reducing mechanism 6 located below fixes the fan body through the wind guide constraint frame 601 and the main body constraint frame 603. Multiple groups of shock-absorbing pads absorb the impact generated by the mechanical rotation displacement collision to prevent noise. The steering roller 2 and the thrust rod 5 on the outside of the device facilitate the transfer of the device.

[0023] Specifically, the base 1 is spirally connected to the steering roller 2, four groups of steering rollers 2 are provided, the base 1 is spirally connected to the outer frame shell 3, and the steering roller 2 and the thrust rod 5 on the outside of the device facilitate the transfer of the device.

[0024] Specifically, the outer frame shell 3 and the display control console 4 are spirally connected, the outer frame shell 3 and the thrust rod 5 are welded, a battery pack 16 is arranged above the base 1, and the base 1 and the battery pack 16 are welded. When the display control console 4 is powered on, the battery pack 16 provides energy for the entire device so that it can work normally when there is no external power supply.

[0025] Specifically, the base 1 and the wind guide constraint frame 601 are spirally connected, the wind guide constraint frame 601 and the first shock-absorbing pad 602 are adhered, a main body constraint frame 603 is arranged above the base 1, the base 1 and the main body constraint frame 603 are spirally connected, the main body constraint frame 603 and the second shock-absorbing pad 604 are adhered, a third shock-absorbing pad 605 is arranged on the inner side of the main body constraint frame 603, the main body constraint frame 603 and the third shock-absorbing pad 605 are adhered, the shock-absorbing and noise-reducing mechanism 6 fixes the fan body through the wind guide constraint frame 601 and the main body constraint frame 603, and multiple groups of shock-absorbing pads absorb the impact generated by the mechanical rotation displacement collision to prevent noise.

[0026] Specifically, the third shock-absorbing pad 605 and the annular air duct 7 are sleeved, the annular air duct 7 and the turbofan 8 are spirally connected, and the annular air duct 7 and the variable speed motor 9 are spirally connected. The variable speed motor 9 drives the turbofan 8 to rotate and can change the speed according to demand to adjust the wind force.

[0027] Specifically, the annular air duct 7 is welded to the air inlet channel 10, the air inlet channel 10 passes through one side of the outer frame shell 3, the air inlet channel 10 and the sealing cover 11 are spirally connected, the sealing cover 11 and the dust filter 12 are slotted, the outside air is sucked in through the air inlet channel 10, and the dust filter 12 prevents small particles from entering the device and damaging it.

[0028] Specifically, the annular air duct 7 and the exhaust channel 13 are welded, the exhaust channel 13 is arranged above the first shock-absorbing pad 602, the first shock-absorbing pad 602 and the exhaust channel 13 are socketed, the exhaust channel 13 and the composite silencer pipe sleeve 14 are socketed, and the exhaust channel 13 and the telescopic lock tube 15 are plugged. The outer composite silencer pipe sleeve 14 reduces the internal noise generated by air vibration, and the telescopic lock tube 15 is connected to the external pipeline to reduce the probability of debris entering the interior.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-noise centrifugal fan, comprising a base (1) and a vibration-absorbing and noise-reducing mechanism (6), characterized in that: A steering roller (2) is arranged below the base (1), an outer frame shell (3) is arranged above the base (1), a display control console (4) is arranged above the outer frame shell (3), a thrust rod (5) is arranged at one end of the outer frame shell (3), a shock-absorbing and noise-reducing mechanism (6) is arranged below the inner part of the outer frame shell (3), an air guide restraint frame (601) is arranged above the base (1), a first shock-absorbing pad (602) is arranged above the air guide restraint frame (601), a main body restraint frame (603) is arranged on one side of the air guide restraint frame (601), a second shock-absorbing pad (604) is arranged above the main body restraint frame (603), and a third shock-absorbing pad (602) is arranged above the second shock-absorbing pad (604). 05), an annular air duct (7) is arranged on one side of the third shock-absorbing pad (605), a turbo fan (8) is arranged inside the annular air duct (7), a variable speed motor (9) is arranged on one side of the annular air duct (7), an air intake channel (10) is arranged on the other side of the annular air duct (7), a sealing cover (11) is arranged on the other side of the air intake channel (10), a dust filter (12) is arranged on the other side of the sealing cover (11), an exhaust channel (13) is arranged at one end of the annular air duct (7), a composite silencer pipe sleeve (14) is arranged on the outside of the exhaust channel (13), a telescopic lock tube (15) is arranged at the other end of the exhaust channel (13), and a battery pack (16) is arranged at one end of the variable speed motor (9).

2. A low noise centrifugal fan according to claim 1, characterized in that: The base (1) and the steering roller (2) are connected in a spiral manner, four groups of the steering rollers (2) are provided, and the base (1) and the outer frame shell (3) are connected in a spiral manner.

3. A low noise centrifugal fan according to claim 1, characterized in that: The outer frame shell (3) and the display console (4) are screw-connected, the outer frame shell (3) and the thrust rod (5) are welded, a battery pack (16) is arranged above the base (1), and the base (1) and the battery pack (16) are welded.

4. A low noise centrifugal fan according to claim 1, characterized in that: The base (1) and the wind guide constraint frame (601) are spirally connected, the wind guide constraint frame (601) and the first shock-absorbing pad (602) are adhesively connected, a main body constraint frame (603) is arranged above the base (1), the base (1) and the main body constraint frame (603) are spirally connected, the main body constraint frame (603) and the second shock-absorbing pad (604) are adhesively connected, a third shock-absorbing pad (605) is arranged on the inner side of the main body constraint frame (603), and the main body constraint frame (603) and the third shock-absorbing pad (605) are adhesively connected.

5. A low noise centrifugal fan according to claim 1, characterized in that: The third shock-absorbing pad (605) and the annular air duct (7) are sleeve-connected, the annular air duct (7) and the turbofan (8) are spirally connected, and the annular air duct (7) and the variable speed motor (9) are spirally connected.

6. A low noise centrifugal fan according to claim 1, characterized in that: The annular air passage (7) and the air intake passage (10) are welded, the air intake passage (10) passes through one side of the outer frame shell (3), the air intake passage (10) and the sealing cover (11) are spirally connected, and the sealing cover (11) and the dust filter (12) are slot-connected.

7. A low noise centrifugal fan according to claim 1, characterized in that: The annular air passage (7) and the exhaust passage (13) are welded, an exhaust passage (13) is arranged above the first shock-absorbing pad (602), the first shock-absorbing pad (602) and the exhaust passage (13) are sleeved, the exhaust passage (13) and the composite silencer pipe sleeve (14) are sleeved, and the exhaust passage (13) and the telescopic lock pipe (15) are plugged.