Low-noise air-volume-adjustable ventilating fan

Abstract

The utility model discloses a low noise air volume adjustable ventilator, including: barrel, motor and fan blade, be equipped with noise reduction subassembly in the barrel, noise reduction subassembly is located the front of fan blade, noise reduction subassembly includes outer ring, fold type noise elimination sheet and inner ring, fold type noise elimination sheet evenly distributed between outer ring and inner ring, outer ring is fixed on the inner wall of barrel. The device is novel in structure, low in operation noise, not prone to causing noise pollution to the surrounding environment and high in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation fans, and particularly relates to a ventilation fan with low noise and adjustable air volume. Background Art

[0002] A ventilation fan is an air-conditioning electrical appliance that drives air flow by a motor to rotate the fan blades, so as to exchange indoor and outdoor air.

[0003] The existing ventilation fans have the following defects in the use process: when the fan blades rotate at high speed, they will generate relatively large noise, causing noise pollution to the surrounding environment, and thus affecting the health of the people present.

[0004] The existing patent document (Publication No.: CN214092396U) discloses "a ventilation fan", which also has the above technical problems. Summary of the Invention

[0005] The purpose of the utility model is to solve the above technical problems existing in the prior art, and provide a ventilation fan with low noise and adjustable air volume, which has a novel structure, low noise during operation, is not easy to cause noise pollution to the surrounding environment, and has strong practicability.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A ventilation fan with low noise and adjustable air volume includes: a cylinder body, a motor and fan blades. It is characterized in that: a noise reduction component is arranged in the cylinder body, the noise reduction component is located in front of the fan blades, the noise reduction component includes an outer ring, folded sound absorption sheets and an inner ring, the folded sound absorption sheets are evenly distributed between the outer ring and the inner ring, and the outer ring is fixed on the inner wall of the cylinder body. This ventilation fan has a novel structure, low noise during operation, is not easy to cause noise pollution to the surrounding environment, and has strong practicability.

[0008] Furthermore, a cavity is arranged between the outer wall and the inner wall of the cylinder body, the cavity is filled with sound-absorbing cotton, and through holes communicating with the cavity are arranged on the inner wall of the cylinder body. The sound-absorbing cotton can effectively absorb the noise generated when the fan blades rotate, reduce the outward propagation of noise, and achieve a good noise reduction effect.

[0009] Furthermore, a fixed bracket is arranged in the cylinder body, the fixed bracket includes a mounting rod and a retaining ring, the mounting rods are circumferentially distributed on the retaining ring, the mounting rods connect the motor and the cylinder body, the mounting rods in multiple directions support the motor, limit the free swaying of the motor, improve the stability of the motor, and are conducive to the smooth operation of the motor; the diameter of the retaining ring increases from the inside to the outside, playing a role of hindrance at the back, preventing foreign objects from entering the cylinder body and contacting the rotating fan blades, resulting in damage to the fan blades.

[0010] Furthermore, the mounting rod is fixedly connected to the motor and the cylinder body by screws. The fixation is reliable, the disassembly and assembly are convenient, it can be installed and used immediately, and it is flexible and convenient.

[0011] Furthermore, a mesh cover is fixedly connected to the air outlet of the cylinder by screws. The fixation is reliable, the mesh cover is convenient to assemble and disassemble, and it can be used at any time. The mesh cover plays a front blocking role to prevent foreign objects from entering the cylinder and contacting the rotating fan blades to cause damage to the fan blades.

[0012] Furthermore, an ear block is provided on the outer ring, and the ear block is fixed to the inner wall of the cylinder by screws. The fixation is reliable, and the noise reduction component is easy to disassemble and assemble, flexible and convenient.

[0013] Furthermore, the cylinder is provided with an outer edge, and a mounting through hole is provided on the outer edge. Screws are inserted into the mounting through hole to facilitate fixing the cylinder at the reserved ventilation hole, and the installation is convenient.

[0014] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0015] 1. The sound waves generated during the rotation of the fan blades will be blocked by the folded silencer. The folded silencer uses the principle of sound wave reflection to offset each other's sound waves to eliminate noise, making the noise generated by the rotation of the fan blades smaller and achieving the purpose of noise reduction.

[0016] 2. The sound-absorbing cotton in the cavity can effectively absorb the noise generated when the fan blades rotate, reduce the noise from spreading outward, and achieve a good noise reduction effect.

[0017] 3. The mounting rods in multiple directions provide support for the motor, limit the free swing of the motor, improve the stability of the motor, and facilitate the smooth operation of the motor; the fixed bracket cooperates with the mesh cover to achieve front and rear blocking, preventing foreign objects from entering the cylinder and contacting the rotating fan blades to cause damage to the fan blades, playing a simple protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a low-noise and adjustable air volume ventilation fan of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the connection between the cylinder and the motor in the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the connection between the cylinder and the noise reduction component in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the noise reduction component in the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the connection between the fixed bracket and the motor in the utility model;

[0024] Figure 6This is a schematic diagram of the internal structure of the cylinder in the present utility model.

[0025] In the figure: 1 - cylinder; 2 - motor; 3 - fan blade; 4 - control board; 5 - fixing bracket; 6 - mounting rod; 7 - retaining ring; 8 - mesh cover; 9 - noise reduction component; 10 - outer ring; 11 - folded sound absorption sheet; 12 - inner ring; 13 - ear block; 14 - cavity; 15 - sound absorption cotton; 16 - circulation hole; 17 - outer edge; 18 - mounting through hole. Specific embodiments

[0026] As Figures 1 to 6 shown, a ventilation fan with adjustable air volume and low noise of the present utility model includes: a cylinder 1, a motor 2 and a fan blade 3. The output end of the motor 2 is connected to the fan blade 3. A control board 4 is connected to the motor 2. The control board 4 is electrically connected with a stepless speed regulation circuit. The control board 4 can perform stepless speed regulation on the motor 2 through the stepless speed regulation circuit, which can meet the requirements of users for adjusting the air volume. The structure of the stepless speed regulation circuit can refer to the "stepless speed regulation circuit" in the published patent document (publication number: CN206877264U), which belongs to the prior art and will not be elaborated here.

[0027] A fixing bracket 5 is arranged in the cylinder 1. The fixing bracket 5 is located behind the fan blade 3. The fixing bracket 5 includes a mounting rod 6 and a retaining ring 7. The mounting rods 6 are circumferentially distributed on the retaining ring 7. The mounting rods 6 connect the motor 2 and the cylinder 1. The mounting rods 6 in multiple directions support the motor 2, limit the free swaying of the motor 2, improve the stability of the motor 2, and are beneficial to the smooth operation of the motor 2; the diameter of the retaining ring 7 increases from inside to outside, playing a role of rear blocking, preventing foreign objects from falling into the cylinder 1 and contacting the rotating fan blade 3, resulting in damage to the fan blade 3.

[0028] A mesh cover 8 is fixedly connected to the air outlet of the cylinder 1 by screws. The connection is reliable, and the mesh cover 8 is convenient to disassemble and assemble, and can be used immediately after installation, which is flexible and convenient. The mesh cover 8 plays a role of front blocking, and cooperates with the fixing bracket 5 to achieve front and rear blocking, effectively preventing foreign objects from entering the cylinder 1 and contacting the rotating fan blade 3, resulting in damage to the fan blade 3, and playing a simple protection role.

[0029] Both ends of the mounting rod 6 are respectively fixedly connected to the motor 2 and the cylinder 1 by screws. The connection is reliable, and the disassembly and assembly are convenient, and it can be used immediately after installation, which is flexible and convenient.

[0030] A noise reduction component 9 is arranged in the cylinder 1. The noise reduction component 9 is located between the fan blade 3 and the mesh cover 8. The noise reduction component 9 includes an outer ring 10, a folded sound absorption sheet 11 and an inner ring 12. The folded sound absorption sheets 11 are evenly distributed between the outer ring 10 and the inner ring 12, and between the inner ring 12 and the inner ring 12. The outer ring 10 is fixed on the inner wall of the cylinder 1. The folded sound absorption sheets 11 are arranged step by step from outside to inside, not only improving the sound absorption effect, but also improving the structural stability of the noise reduction component 9.

[0031] After being powered on, the motor 2 drives the fan blade 3 to rotate. The sound waves generated during the rotation of the fan blade 3 will be blocked by the folded sound-absorbing sheet 11. The folded sound-absorbing sheets 11 cancel out the sound waves with each other based on the principle of sound wave reflection to eliminate noise, reducing the noise generated by the rotation of the fan blade 3 and achieving the purpose of noise reduction.

[0032] Ear blocks 13 are provided on the outer ring 10. The ear blocks 13 are fixed to the inner wall of the cylinder body 1 by screws, with reliable fixation. The noise reduction component 9 is convenient to disassemble and install, being flexible and convenient.

[0033] A cavity 14 is provided between the outer wall and the inner wall of the cylinder body 1. Sound-absorbing cotton 15 is filled in the cavity 14. Communication holes 16 communicating with the cavity 14 are provided on the inner wall of the cylinder body 1. The sound-absorbing cotton 15 can effectively absorb the noise generated when the fan blade 3 rotates, reducing the outward propagation of noise and achieving a good noise reduction effect.

[0034] The cylinder body 1 is provided with an outer edge 17, and mounting through holes 18 are provided on the outer edge 17. Inserting screws into the mounting through holes 18 facilitates fixing the cylinder body 1 at the reserved ventilation holes, with convenient installation.

[0035] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements, or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the present invention.

Claims

1. A ventilation fan with adjustable air volume and low noise, comprising: a cylinder body, a motor and a fan blade, characterized in that: a noise reduction component is arranged in the cylinder body, the noise reduction component is located in front of the fan blade, the noise reduction component includes an outer ring, a folded sound absorption sheet and an inner ring, the folded sound absorption sheets are evenly distributed between the outer ring and the inner ring, and the outer ring is fixed on the inner wall of the cylinder body.

2. The exhaust fan with adjustable air volume and low noise according to claim 1, characterized in that: a cavity is arranged between the outer wall and the inner wall of the cylinder body, the cavity is filled with sound-absorbing cotton, and the inner wall of the cylinder body is provided with a through hole communicating with the cavity.

3. The exhaust fan with adjustable air volume and low noise according to claim 1, wherein: a fixing bracket is arranged in the cylinder body, the fixing bracket includes a mounting rod and a retaining ring, the mounting rods are circumferentially distributed on the retaining ring, the mounting rods connect the motor and the cylinder body, and the diameter of the retaining ring increases from inside to outside.

4. A ventilation fan with adjustable air volume and low noise according to claim 3, characterized in that: the mounting rod is fixedly connected to the motor and the cylinder body by screws.

5. The exhaust fan with adjustable air volume and low noise according to claim 1, wherein: a wire mesh cover is fixedly connected to the air outlet of the cylinder body by screws.

6. The exhaust fan with adjustable air volume and low noise according to claim 1, characterized in that: ear blocks are arranged on the outer ring, and the ear blocks are fixed on the inner wall of the cylinder body by screws.

7. The exhaust fan with adjustable air volume and low noise according to claim 1, characterized in that: the cylinder body is provided with an outer edge, and mounting through holes are arranged on the outer edge.

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