Low-noise centrifugal fan with noise reduction function

Abstract

The low-noise centrifugal fan with the noise reduction function comprises a centrifugal fan body, an air outlet barrel is installed on one side of the centrifugal fan body, a dust cover is detachably connected to the outer side of the air outlet barrel through screws, and a knocking assembly is arranged on the outer side of the air outlet barrel on one side of the dust cover. And a connecting block is mounted on one side of the centrifugal fan main body. According to the utility model, the sound insulation cover covers the driving motor, that is, the edge block is plugged into the butt joint hole, and the edge block is clamped into the outer side of the clamping rubber block by utilizing the elastic deformation performance of the rubber clamping roller, so that the sound insulation cover can be conveniently mounted on one side of the connecting block, and noise generated in the working process of the driving motor can be blocked by utilizing the sound insulation cover; the sound insulation cover is used for further noise insulation, the sound insulation cover is filled with sound absorption cotton, noise absorption can be conducted, the noise reduction effect is achieved, and the comfort level of the surrounding environment during use can be improved.

Description

Technical Field

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

[0002] With the continuous development of industrial technology, centrifugal fans have been widely used in various fields. However, traditional centrifugal fans are often accompanied by large noise during operation, which causes considerable interference to people's production and living environment. In order to solve this problem, low-noise centrifugal fans with noise reduction function came into being.

[0003] In a centrifugal fan with noise reduction function with publication number CN217873473U, it includes a centrifugal fan body and a motor, the motor is installed on the centrifugal fan body, and the centrifugal fan body is installed with support legs. The centrifugal fan also includes: a noise reduction cylinder, which is installed on the centrifugal fan body and is located on the opposite side of the motor; in the centrifugal fan of the utility model, a noise reduction cylinder and a noise reduction box are respectively installed at the air inlet and the motor of the centrifugal fan, and sound insulation cotton is provided on the inner walls of the noise reduction cylinder and the noise reduction box. Through this arrangement, the noise intensity generated by the centrifugal fan when it is working can be reduced to a certain extent, which is convenient for use, and a noise reduction cylinder is installed at the bottom of the centrifugal fan through a first spring, a movable sheet, a second spring and a bolt. The buffer components used appropriately can reduce the vibration amplitude generated when the centrifugal fan is working to a certain extent, avoid the loosening of the bolts due to large vibration, and have high practicality. When the above-mentioned prior art is in use, the motor is covered with a noise reduction box for noise reduction treatment. However, in actual use, the noise reduction box is fixedly installed, which is inconvenient to disassemble. The fixedly installed noise reduction box will cause inconvenience during fan maintenance. As a mechanical equipment, the centrifugal fan needs regular maintenance, inspection and replacement of parts. If the noise reduction box is fixedly installed, then when performing these operations, additional work is required to disassemble and reinstall the noise reduction box, which will increase the difficulty and complexity of maintenance and may also result in additional maintenance costs. Therefore, corresponding improvements are needed. Utility Model Content

[0004] The utility model aims to provide a low-noise centrifugal fan with a noise reduction function, so as to solve the problem that the noise reduction components of the existing low-noise centrifugal fan with a noise reduction function proposed in the above background technology are inconvenient to disassemble and assemble during use, which leads to inconvenience in the later inspection and maintenance of the centrifugal fan.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise centrifugal fan with a noise reduction function, comprising a centrifugal fan body, an air outlet cylinder is installed on one side of the centrifugal fan body, and a dust cover is detachably connected to the outside of the air outlet cylinder by screws, a knocking assembly is arranged on the outside of the air outlet cylinder on one side of the dust cover, a connecting block is installed on one side of the centrifugal fan body, and a driving motor is installed on one side of the connecting block, a main shaft is installed at one end of the driving motor, and fan blades are evenly installed on the outside of the main shaft, a sound insulation cover is installed on one side of the connecting block on the outside of the driving motor, and a disassembly mechanism is arranged between the sound insulation cover and the connecting block, a noise reduction assembly is arranged inside the sound insulation cover, and a heat dissipation hole is arranged on one side of the sound insulation cover.

[0006] When a low-noise centrifugal fan with a noise reduction function according to the technical solution is used, a disassembly mechanism is provided so that the sound insulation cover can be conveniently disassembled and assembled during use, and the sound insulation cover can be used to shield the driving motor to achieve the sound insulation effect, and the sound insulation cover can be conveniently removed later to facilitate the maintenance and repair of the driving motor.

[0007] Preferably, the noise reduction component includes a sound insulation cover installed inside the driving motor, and the interior of the sound insulation cover is filled with sound-absorbing cotton.

[0008] Preferably, the sound insulation cover and the sound insulation hood are both evenly provided with fixing holes, and the fixing holes on the sound insulation cover and the sound insulation hood are interconnected.

[0009] Preferably, a dustproof net is installed on one side of the soundproof cover, and fixing pins are evenly installed on the periphery of the dustproof net, one end of the fixing pins extends to the inside of the fixing holes, and the fixing holes are arranged on one side of the soundproof cover, and the dustproof net is detachably connected to the soundproof cover through the fixing pins and the fixing holes.

[0010] Preferably, the knocking assembly includes a belt assembly sleeved on the outside of the main shaft, and a driven shaft is installed on one side of the centrifugal fan body on one side of the belt assembly, and an impact bump is sleeved on the outside of the driven shaft, and the impact bump is made of rubber.

[0011] Preferably, the belt assembly comprises a driving wheel, a driven wheel and a connecting belt, the driving wheel and the driven wheel are respectively sleeved on the outside of the main shaft and the driven shaft, and a connecting belt is connected between the driving wheel and the driven wheel.

[0012] Preferably, the disassembly mechanism includes a support block, and the support blocks are provided in two groups, each group is provided with two blocks, side blocks are installed at both ends of one side of the support block, and rubber clamping rollers are connected between the side blocks through circular shafts, clamping rubber blocks are connected between the rubber clamping rollers, and the clamping rubber blocks are installed inside the docking hole, and the docking hole is provided on one side of the connecting block.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the low-noise centrifugal fan with noise reduction function not only has a good noise reduction effect, but also the noise reduction element can be conveniently disassembled and assembled, so as to facilitate the later inspection and maintenance of the centrifugal fan, and has a good filtering function and good anti-blocking effect;

[0014] The soundproof cover is covered on the driving motor, that is, the edge block is inserted into the docking hole, and the elastic deformation performance of the rubber clamping roller is used to clamp it to the outside of the clamping rubber block, so that the soundproof cover can be conveniently installed on one side of the connecting block, so that the noise generated during the operation of the driving motor can be blocked by the soundproof cover, and the soundproof cover in the soundproof cover is used for further noise blocking, and the soundproof cover is filled with sound-absorbing cotton, which can absorb noise and achieve the effect of noise reduction, which can improve the comfort of the surrounding environment during use. The soundproof cover can be removed by performing the above-mentioned reverse operation later, so that the driving motor can be conveniently inspected and maintained later, without excessive operations in the later stage, so as to achieve the effect of saving use costs;

[0015] The main shaft and fan blades are driven by a driving motor to rotate to discharge air, and a dust cover is installed on the outside of the air outlet to protect the fan blades and prevent dust from flowing in. In this process, the belt assembly can drive the driven shaft and the impact bump to rotate synchronously. The impact bump contacts the dust cover during rotation to achieve a vibration and knocking effect, so as to shake off the impurities filtered on the dust cover, avoid the dust cover from being blocked too quickly, and enable the dust cover to maintain a continuous filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 2 It is a side view structural schematic diagram of the utility model;

[0019] Figure 3 For the utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the fixing mechanism of the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the sound insulation cover of the utility model.

[0022] Explanation of the reference numerals in the figure: 1. Centrifugal fan body; 2. Air outlet cylinder; 3. Dust cover; 4. Driven shaft; 5. Impact bump; 6. Connecting block; 601. Docking hole; 7. Disassembly mechanism; 701. Support block; 702. Edge block; 703. Rubber clamping roller; 704. Clamping rubber block; 8. Sound insulation cover; 801. Fixing hole; 9. Dust net; 901. Fixing pin; 10. Heat dissipation hole; 11. Driving motor; 12. Main shaft; 13. Fan blades; 14. Belt assembly; 15. Sound insulation cover; 16. Sound-absorbing cotton. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment 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.

[0024] See also Figure 1-Figure 5 The utility model provides an embodiment: a low-noise centrifugal fan with a noise reduction function, comprising a centrifugal fan body 1, an air outlet 2 is installed on one side of the centrifugal fan body 1, and a dust cover 3 is detachably connected to the outer side of the air outlet 2 by screws, and a knocking component is arranged on the outer side of the air outlet 2 on one side of the dust cover 3;

[0025] The knocking assembly includes a belt assembly 14 sleeved on the outside of the main shaft 12, and a driven shaft 4 is installed on one side of the centrifugal fan body 1 on one side of the belt assembly 14, and a striking protrusion 5 is sleeved on the outside of the driven shaft 4, and the striking protrusion 5 is made of rubber;

[0026] The belt assembly 14 includes a driving wheel, a driven wheel and a connecting belt. The driving wheel and the driven wheel are respectively sleeved on the outside of the main shaft 12 and the driven shaft 4, and a connecting belt is connected between the driving wheel and the driven wheel.

[0027] Specifically, Figure 1 , Figure 2 As shown, when in use, the driving motor 11 drives the main shaft 12 and the fan blades 13 to rotate, and the belt assembly 14 can be used to rotate the driven shaft 4 and the impact convex block 5, so that the impact convex block 5 can be used to rotate and collide with the dust cover 3 to achieve a vibration effect, thereby preventing the dust cover 3 from being blocked by impurities such as dust;

[0028] A connecting block 6 is installed on one side of the centrifugal fan body 1, and a driving motor 11 is installed on one side of the connecting block 6. A main shaft 12 is installed at one end of the driving motor 11, and fan blades 13 are evenly installed on the outside of the main shaft 12. A soundproof cover 8 is installed on one side of the connecting block 6 outside the driving motor 11;

[0029] A dustproof net 9 is installed on one side of the sound insulation cover 8, and fixing pins 901 are evenly installed on the periphery of the dustproof net 9, one end of the fixing pins 901 extends to the inside of the fixing holes 801, and the fixing holes 801 are all arranged on one side of the sound insulation cover 8, and the dustproof net 9 is detachably connected to the sound insulation cover 8 through the fixing pins 901 and the fixing holes 801. A dustproof net 9 is installed on one side of the sound insulation cover 8, and fixing pins 901 are evenly installed on the periphery of the dustproof net 9, one end of the fixing pins 901 extends to the inside of the fixing holes 801, and the fixing holes 801 are all arranged on one side of the sound insulation cover 8, and the dustproof net 9 is detachably connected to the sound insulation cover 8 through the fixing pins 901 and the fixing holes 801;

[0030] Specifically, Figure 1 , Figure 5 As shown, when in use, the fixing pin 901 is screwed into the fixing hole 801, and the dustproof net 9 can be conveniently installed on one side of the sound insulation cover 8, so that the heat dissipation hole 10 can be shielded by the dustproof net 9 to achieve a dustproof effect;

[0031] A disassembly mechanism 7 is provided between the sound insulation cover 8 and the connecting block 6;

[0032] The disassembly mechanism 7 includes a support block 701, and the support block 701 is provided with two groups, each group is provided with two, and side blocks 702 are installed at both ends of one side of the support block 701, and rubber clamping rollers 703 are connected between the side blocks 702 through a circular shaft, and clamping rubber blocks 704 are connected between the rubber clamping rollers 703, and the clamping rubber blocks 704 are installed inside the docking hole 601, and the docking hole 601 is provided on one side of the connection block 6;

[0033] Specifically, Figure 1 , Figure 3 , Figure 4 As shown, when in use, the side block 702 and the rubber clamping roller 703 are inserted into the docking hole 601. During the plugging process, the rubber clamping roller 703 is squeezed and deformed until the two sets of rubber clamping rollers 703 are clamped between the clamping rubber blocks 704. Then, the sound insulation cover 8 can be conveniently installed on one side of the connecting block 6. Later, by pulling the sound insulation cover 8, the side block 702 and the rubber clamping roller 703 can be pulled out from the docking hole 601, and the sound insulation cover 8 can be removed, so as to overhaul and maintain the drive motor 11 later.

[0034] A noise reduction component is provided inside the soundproof enclosure 8, and a heat dissipation hole 10 is provided on one side of the soundproof enclosure 8;

[0035] The noise reduction component includes a soundproof cover 15 installed inside the driving motor 11, and the interior of the soundproof cover 15 is filled with sound-absorbing cotton 16;

[0036] The sound insulation cover 8 and the sound insulation cover 15 are evenly provided with fixing holes 801, and the fixing holes 801 on the sound insulation cover 8 and the sound insulation cover 15 are connected to each other;

[0037] Specifically, Figure 1 , Figure 5 As shown, when in use, the sound insulation cover 8 and the sound insulation cover 15 in the sound insulation cover 8 cooperate with each other to block the noise generated during the operation of the driving motor 11, and the sound insulation cover 15 is filled with sound-absorbing cotton 16 to further absorb the noise, thereby achieving a better sound insulation effect.

[0038] Working principle: When the utility model is used, firstly, the dust cover 3 is installed on the outer side of the air outlet 2 by screws, so that the air outlet 2 can be shielded when in use to prevent dust and other impurities from falling into the air outlet 2, and then the driving motor 11 drives the main shaft 12 and the fan blades 13 to rotate, so that the centrifugal fan body 1 can work normally, and the belt assembly 14 can drive the driven shaft 4 to rotate synchronously during the rotation of the main shaft 12, thereby driving the impact convex block 5 to rotate, and the impact convex block 5 will collide with the dust cover 3 during the rotation process, generating a certain vibration force, and then the impurities filtered on the dust cover 3 can be shaken off, so as to prevent the dust cover 3 from being blocked too quickly;

[0039] Secondly, push the support block 701, the side block 702 and the rubber clamping roller 703, insert the rubber clamping roller 703 into the docking hole 601, until the rubber clamping roller 703 is clamped on both sides of the clamping rubber block 704, the sound insulation cover 8 can be conveniently installed on one side of the connecting block 6, and the sound insulation cover 8 is placed on the outside of the driving motor 11, and the sound insulation cover 8 and the sound insulation cover 15 and the sound absorbing cotton 16 in the sound insulation cover 8 can be used to cooperate with each other to block the noise generated during the working process of the driving motor 11, so as to achieve the effect of noise reduction, and the above-mentioned reverse operation can be performed later to remove the sound insulation cover 8, so as to facilitate the maintenance and repair of the driving motor 11 later;

[0040] Finally, multiple groups of heat dissipation holes 10 are provided on the sound insulation cover 8 and the sound insulation cover 15, so as to achieve sound insulation and heat dissipation effect at the same time. Moreover, by screwing the fixing pin 901 into the fixing hole 801, the dustproof net 9 can be installed on one side of the sound insulation cover 8 to block the heat dissipation holes 10 and achieve the filtering effect.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A low-noise centrifugal fan with a noise reduction function, comprising a centrifugal fan body (1), an air outlet cylinder (2) being installed on one side of the centrifugal fan body (1), and a dust cover (3) being detachably connected to the outer side of the air outlet cylinder (2) by means of screws, a knocking assembly being arranged on the outer side of the air outlet cylinder (2) on one side of the dust cover (3), a connecting block (6) being installed on one side of the centrifugal fan body (1), and a driving motor (11) being installed on one side of the connecting block (6), a main shaft (12) being installed on one end of the driving motor (11), and fan blades (13) being evenly installed on the outer side of the main shaft (12), a soundproof cover (8) being installed on one side of the connecting block (6) on the outer side of the driving motor (11), and a disassembly mechanism (7) being arranged between the soundproof cover (8) and the connecting block (6), a noise reduction assembly being arranged inside the soundproof cover (8), and a heat dissipation hole (10) being arranged on one side of the soundproof cover (8).

2. A low-noise centrifugal fan with noise reduction function according to claim 1, characterized in that: The noise reduction component comprises a sound insulation cover (15) installed inside the driving motor (11), and the interior of the sound insulation cover (15) is filled with sound absorbing cotton (16).

3. A low-noise centrifugal fan with noise reduction function according to claim 1 or 2, characterized in that: The sound insulation cover (8) and the sound insulation cover (15) are both evenly provided with fixing holes (801), and the fixing holes (801) on the sound insulation cover (8) and the sound insulation cover (15) are interconnected.

4. The low-noise centrifugal fan with noise reduction function according to claim 1, characterized in that: A dustproof net (9) is installed on one side of the soundproof cover (8), and fixing pins (901) are evenly installed on the periphery of the dustproof net (9), one end of each of the fixing pins (901) extends to the inside of the fixing holes (801), and the fixing holes (801) are all arranged on one side of the soundproof cover (8), and the dustproof net (9) is detachably connected to the soundproof cover (8) via the fixing pins (901) and the fixing holes (801).

5. The low-noise centrifugal fan with noise reduction function according to claim 1, characterized in that: The knocking assembly comprises a belt assembly (14) sleeved on the outside of a main shaft (12), and a driven shaft (4) is installed on one side of the centrifugal fan body (1) on one side of the belt assembly (14), and an impact lug (5) is sleeved on the outside of the driven shaft (4), and the impact lug (5) is made of rubber.

6. A low-noise centrifugal fan with noise reduction function according to claim 5, characterized in that: The belt assembly (14) comprises a driving wheel, a driven wheel and a connecting belt. The driving wheel and the driven wheel are respectively sleeved on the outside of the main shaft (12) and the driven shaft (4). A connecting belt is connected between the driving wheel and the driven wheel.

7. The low-noise centrifugal fan with noise reduction function according to claim 1, characterized in that: The disassembly mechanism (7) comprises a support block (701), and the support block (701) is provided in two groups, each group being provided with two support blocks, side blocks (702) are installed at both ends of one side of the support block (701), and rubber clamping rollers (703) are connected between the side blocks (702) via a circular shaft, and clamping rubber blocks (704) are connected between the rubber clamping rollers (703), and the clamping rubber blocks (704) are installed inside the docking hole (601), and the docking hole (601) is provided on one side of the connection block (6).

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