Low-noise centrifugal fan

Abstract

The utility model discloses a low-noise centrifugal fan which comprises a fan body, the bottom face of the fan body is fixedly connected with two supports which are in mirror symmetry, the tail ends of the two supports jointly fix a supporting plate, the bottom face of the supporting plate is provided with a first buffering piece, the outer edge of the supporting plate is movably connected with a groove body, and the top face of the groove body is fixedly connected with a top plate. The inner wall of the groove body is fixedly connected with a sound insulation plate, the bottom face of the groove body is fixedly connected with a bottom plate, and the four corners of the bottom face of the bottom plate are each vertically and fixedly provided with a suction cup. The first buffering piece is arranged in the groove body, vibration generated during operation of the fan is buffered, the noise reduction function can be achieved, meanwhile, the sound insulation plate is arranged in the groove body, the noise reduction function is further achieved, when the fan operates, the fan is firmly fixed to the ground through the suction cup, the noise reduction effect is good, and the service life of the fan is prolonged. And the fan is prevented from moving due to vibration, and the effect of reducing noise generated when the fan moves is achieved.

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 supporting device that utilizes input mechanical energy to increase gas pressure and discharge gas. With the continuous development of factories, mines, tunnels, etc., centrifugal fans are needed for ventilation, dust removal and cooling. With the continuous development of science and technology, people's requirements for the manufacturing process of centrifugal fans are getting higher and higher.

[0003] Existing centrifugal fans generate certain vibrations when working, causing the base to vibrate along with the vibration of the centrifugal fan, thereby generating certain noise. This noise seriously affects the surrounding environment and causes damage to the physical and mental health of people who work and live near the fan for a long time. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a low-noise centrifugal fan.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a low-noise centrifugal fan, comprising a fan, the bottom surface of the fan is fixedly connected to two mirror-symmetrical brackets, the ends of the two brackets are jointly fixed to a support plate, the bottom surface of the support plate is provided with a first buffer member, the outer edge of the support plate is movably connected to a trough body, the top surface of the trough body is fixedly connected to a top plate, the top plate is movably sleeved on the outer edge of the bracket, the inner wall of the trough body is fixedly connected to a sound insulation board, the bottom surface of the trough body is fixedly connected to a bottom plate, a suction cup is vertically fixed to each of the four corners of the bottom surface of the bottom plate, the outside of the fan is provided with a countersunk hole, and a filter is movably connected in the countersunk hole.

[0006] As a further description of the above technical solution: an external threaded ring is concentrically fixedly sleeved on the outer edge of the filter screen, and the external threaded ring is movably connected to two mirror-symmetrical limiting parts, and the two limiting parts are movably connected in the countersunk hole, and the countersunk hole is provided with an internal thread adapted to the external threaded ring.

[0007] As a further description of the above technical solution: the first buffer component includes an airbag fixedly connected to the support plate, and a plurality of holes that are not connected to the interior of the airbag are vertically opened on the top surface of the airbag, and a telescopic rod is connected in each of the holes, and the telescopic rod is vertically fixed between the support plate and the trough body, and a first spring is connected to the outer edge of each telescopic rod.

[0008] As a further description of the above technical solution: the top surface of the support plate is fixedly connected to a second buffer member with the same structure as the first buffer member, the second buffer member is fixedly connected to the top plate, the top surface of the top plate vertically passes through a plurality of through holes adapted to the bracket, and the bracket is movably connected to the through holes.

[0009] As a further description of the above technical solution: the limit member includes two receiving grooves radially opened on the outside of the external threaded ring, a positioning block is telescopically connected in the receiving groove, a positioning groove adapted to the positioning block is radially opened on the inner wall of the countersunk hole, a through groove passes through the inner wall of the receiving groove, a connecting block is movably connected in the through groove, one end of the connecting block is fixedly connected to the positioning block, and the other end is fixedly connected to a shift block.

[0010] As a further description of the above technical solution: two mirror-symmetrical sliding grooves are vertically opened on the inner wall of the storage groove, a slider is slidably connected in each of the sliding grooves, the slider is fixedly connected to the positioning block, and a second spring is fixed between the sliding groove and the slider.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the existing technology, this low-noise centrifugal fan, by arranging the first buffer member and the second buffer member in the trough body, has a buffering effect on the vibration generated by the fan during operation, thereby achieving the function of noise reduction. At the same time, a sound insulation board is arranged in the trough body, which further plays a role in noise reduction. The suction cup is fixed vertically on the bottom surface of the bottom plate, so that the suction cup can be firmly fixed to the ground when the fan is running, preventing it from moving due to vibration, thereby playing a role in reducing the noise generated when the fan moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional diagram of the overall structure of a low-noise centrifugal fan proposed by the utility model;

[0014] Figure 2 This is a main cross-sectional view of the internal structure of the tank body of a low-noise centrifugal fan proposed in the utility model;

[0015] Figure 3 This is a side cross-sectional view of the connection between the filter screen and the fan of a low-noise centrifugal fan proposed in the utility model;

[0016] Figure 4 This utility model proposes a low-noise centrifugal fan Figure 2 A magnified view of the structure at point A;

[0017] Figure 5 This utility model proposes a low-noise centrifugal fan Figure 3An enlarged view of the structure at B.

[0018] Legend:

[0019] 1, bottom plate; 2, groove body; 3, top plate; 4, support; 5, fan; 6, countersunk hole; 7, push block; 8, external thread ring; 9, filter screen; 10, through hole; 11, air bag; 12, support plate; 13, soundproof board; 14, suction cup; 15, storage groove; 16, positioning groove; 17, positioning block; 18, connecting block; 19, through groove; 20, sleeve hole; 21, first spring; 22, telescopic rod; 23, sliding groove; 24, second spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Reference Figures 1 to 5 The low-noise centrifugal fan provided by the utility model comprises a fan 5, the bottom surface of the fan 5 is fixedly connected with two mirror-symmetrical supports 4, the distal ends of the two supports 4 are fixedly connected with a support plate 12, the bottom surface of the support plate 12 is provided with a first buffer, the outer edge of the support plate 12 is movably connected with a groove body 2, the top surface of the groove body 2 is fixedly connected with a top plate 3, the top plate 3 is movably sleeved on the outer edge of the support 4, the inner wall of the groove body 2 is fixedly connected with a soundproof board 13, the bottom surface of the groove body 2 is fixedly connected with a bottom plate 1, the bottom surface of the bottom plate 1 is vertically fixed with a suction cup 14 at each corner, the outer side of the fan 5 is provided with a countersunk hole 6, the countersunk hole 6 is movably connected with a filter screen 9, the first buffer comprises an air bag 11 fixedly connected with the support plate 12, a plurality of sleeve holes 20 not communicated with the inside of the air bag 11 are vertically formed in the top surface of the air bag 11, a telescopic rod 22 is sleeved in each sleeve hole 20, the telescopic rod 22 is vertically fixed between the support plate 12 and the groove body 2, a first spring 21 is sleeved on the outer edge of each telescopic rod 22, a second buffer same as the first buffer is fixedly connected with the top surface of the support plate 12, the second buffer is fixedly connected with the top plate 3, a plurality of through holes 10 adapted with the support 4 are vertically formed in the top surface of the top plate 3, the support 4 is movably inserted in the through hole 10;

[0022] The outer edge of the filter screen 9 is concentrically fixed with an externally threaded ring 8, and the externally threaded ring 8 is movably connected to two mirror-symmetrical limit members. The two limit members are movably connected in the countersunk hole 6, and the countersunk hole 6 is provided with an internal thread adapted to the externally threaded ring 8. The limit member includes two receiving grooves 15 radially opened on the outside of the externally threaded ring 8, and a positioning block 17 is telescopically connected in the receiving groove 15. The inner wall of the countersunk hole 6 radially opens a positioning groove 16 adapted to the positioning block 17. The inner wall of the receiving groove 15 passes through a through groove 19, and a connecting block 18 is movably connected in the through groove 19. One end of the connecting block 18 is fixedly connected to the positioning block 17, and the other end is fixedly connected to a dial block 7. The inner wall of the receiving groove 15 is vertically provided with two mirror-symmetrical slide grooves 23, each of which is slidably connected to a slider, which is fixedly connected to the positioning block 17, and a second spring 24 is jointly fixed between the slide groove 23 and the slider.

[0023] By arranging the first buffer member and the second buffer member in the trough body 2, the vibration generated by the fan 5 during operation is buffered, thereby achieving the noise reduction function. At the same time, a sound insulation board 13 is arranged in the trough body 2, which further reduces the noise. The suction cup 14 is fixed vertically on the bottom surface of the base plate 1, so that the suction cup 14 is firmly fixed to the ground when the fan 5 is running, preventing it from moving due to vibration, and reducing the noise generated when the fan 5 moves. The filter 9 is movably connected to the countersunk hole 6 through the external threaded ring 8 and the limit member, which facilitates the disassembly and cleaning of the filter 9. It is only necessary to move the shift block 7 so that the positioning block 17 is retracted from the positioning groove 16 into the receiving groove 15, and at the same time the second spring 24 is compressed. Then, the external threaded ring 8 is rotated by the shift block 7 so that the external threaded ring 8 is unscrewed from the countersunk hole 6, and then it can be cleaned.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-noise centrifugal fan, comprising a fan (5), characterized in that: The bottom surface of the fan (5) is fixedly connected to two mirror-symmetrical brackets (4), and the ends of the two brackets (4) are commonly fixed to a support plate (12). The bottom surface of the support plate (12) is provided with a first buffer member. The outer edge of the support plate (12) is movably connected to a trough body (2), and the top surface of the trough body (2) is fixedly connected to a top plate (3). The top plate (3) is movably sleeved on the outer edge of the bracket (4). The inner wall of the trough body (2) is fixedly connected to a sound insulation board (13). The bottom surface of the trough body (2) is fixedly connected to a bottom plate (1), and a suction cup (14) is vertically fixed to each of the four corners of the bottom surface of the bottom plate (1). The outer side of the fan (5) is provided with a countersunk hole (6), and a filter (9) is movably connected in the countersunk hole (6).

2. A low-noise centrifugal fan according to claim 1, characterized in that: An external threaded ring (8) is fixedly sleeved concentrically on the outer edge of the filter screen (9), and the external threaded ring (8) is movably connected to two mirror-symmetrical limiting members, and both of the limiting members are movably connected in the countersunk hole (6), and the countersunk hole (6) is provided with an internal thread adapted to the external threaded ring (8).

3. A low-noise centrifugal fan according to claim 1, characterized in that: The first buffer component comprises an airbag (11) fixedly connected to the support plate (12); a plurality of sleeve holes (20) which are not connected to the interior of the airbag (11) are vertically provided on the top surface of the airbag (11); a telescopic rod (22) is sleeved in each of the sleeve holes (20); the telescopic rod (22) is vertically fixed between the support plate (12) and the trough body (2); and a first spring (21) is sleeved on the outer edge of each telescopic rod (22).

4. A low-noise centrifugal fan according to claim 1, characterized in that: The top surface of the support plate (12) is fixedly connected to a second buffer member having the same structure as the first buffer member, and the second buffer member is fixedly connected to the top plate (3). The top surface of the top plate (3) vertically passes through a plurality of through holes (10) adapted to the bracket (4), and the bracket (4) is movably connected to the through holes (10).

5. The low-noise centrifugal fan according to claim 2, characterized in that: The limiting member comprises two receiving grooves (15) radially opened on the outside of the external threaded ring (8); a positioning block (17) is telescopically connected in the receiving groove (15); a positioning groove (16) adapted to the positioning block (17) is radially opened on the inner wall of the countersunk hole (6); a through groove (19) passes through the inner wall of the receiving groove (15); a connecting block (18) is movably connected in the through groove (19); one end of the connecting block (18) is fixedly connected to the positioning block (17), and the other end is fixedly connected to a shifting block (7).

6. A low-noise centrifugal fan according to claim 5, characterized in that: Two mirror-symmetrical sliding grooves (23) are vertically opened on the inner wall of the receiving groove (15), and a slider is slidably connected in each of the sliding grooves (23). The slider is fixedly connected to the positioning block (17), and a second spring (24) is fixed between the sliding groove (23) and the slider.

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