Low-noise air blower

Abstract

The low-noise air blower comprises a noise reduction outer shell and an air blower body, the noise reduction outer shell is composed of a left shell body, a right shell body and noise reduction covers, the inner side of the left shell body and the inner side of the right shell body are provided with first installation grooves and second installation grooves respectively, the middle of each first installation groove is provided with a through hole, and the two noise reduction covers are fixed to the outer sides of the two through holes respectively. A first silencing plate layer and a second silencing plate layer are further attached to the interior of the first mounting groove and the interior of the second mounting groove respectively, a plurality of elastic cushioning damping fins composed of continuous circular rings are arranged on the inner circumference of the first silencing plate layer in an array mode, and a plurality of elastic gaskets stacked in a scaly mode are attached to the interior of the second silencing plate layer. The periphery of the fan body abuts against the elastic cushioning damping fins, the air outlet of the fan body is attached to the elastic gaskets, the noise reduction shell which is more reliable is arranged, and noise generated when the air blower works can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to a low-noise blower. Background Art

[0002] Low-noise blowers currently on the market generally only have silencers installed on the air inlet and outlet of the blower. When the blower is working, under the vibration of the motor and the shaking of the airflow, especially when the internal parts of the blower lack lubrication, the blower will still make a lot of noise. To solve the above problems, the prior art generally provides a soundproof cover on the outside of the blower and fills soundproof cotton between the soundproof cover and the blower, but this method will obviously greatly affect the air output of the blower, and the sound insulation effect of this simple soundproof cover structure is also rather unsatisfactory. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a low-noise blower equipped with a more reliable noise reduction housing, which can effectively reduce the noise generated by the blower when it is working.

[0004] The technical solution of the utility model is: a low-noise blower, comprising a noise reduction shell and a blower body, wherein the noise reduction shell is composed of a left shell, a right shell and a silencer cover respectively fixed to the outside of the left shell and the right shell;

[0005] The inner sides of the left shell and the right shell are respectively provided with a first mounting groove corresponding to the fan body and a second mounting groove corresponding to the fan outlet, and the middle of the two first mounting grooves is respectively provided with a through hole, and the two muffler covers are respectively fixed on the outer sides of the two through holes and cover the through holes inside;

[0006] The first installation groove and the second installation groove are respectively bonded with a first sound-absorbing plate layer and a second sound-absorbing plate layer, wherein the first sound-absorbing plate layer has a plurality of elastic shock-absorbing damping plates formed by continuous circular rings in an inner peripheral array, and the second sound-absorbing plate layer has a plurality of elastic gaskets stacked in a scale shape bonded therein;

[0007] The left shell and the right shell are fixed, the fan body is installed between the left shell and the right shell, the outer periphery of the fan body is in contact with each elastic shock-absorbing damping sheet, the two sides of the fan body are spaced apart from the through holes of the left shell and the right shell, and the air outlet of the fan body is fitted with each elastic gasket.

[0008] Furthermore, a baffle structure and a silencer groove structure are provided in the silencer cover.

[0009] Furthermore, hollow connecting columns are respectively provided on the left shell and the right shell at the periphery of the through hole, and the silencer cover is connected to the hollow connecting columns by fixing bolts.

[0010] Furthermore, a thickened rubber gasket is provided between the hollow connecting column and the silencer cover.

[0011] Furthermore, silencers are respectively fixed on the air inlet and the air outlet of the fan body.

[0012] Furthermore, the first sound-absorbing board layer is composed of a plurality of arc-shaped sound-absorbing boards glued together by sound-insulating glue.

[0013] Furthermore, the second sound-absorbing board layer is formed by gluing four rectangular sound-absorbing boards together with sound-proof adhesive.

[0014] Furthermore, the left shell and the right shell are provided with corresponding slots and bayonet ports, and the left shell and the right shell are fixed by connecting bolts after being engaged with each other.

[0015] Furthermore, the outer peripheries of the left shell and the right shell also have corresponding connecting seats.

[0016] Furthermore, the bottoms of the left shell and the right shell are respectively provided with supporting feet.

[0017] The beneficial effects of the present invention are as follows: in the present invention, through holes and silencer covers are arranged on both sides of the left shell and the right shell to facilitate air intake, avoiding excessive influence on the air output of the fan main body; the fan main body and its air outlet are in contact with the elastic shock-absorbing damping sheet and the elastic gasket, and are actually supported in a suspended state by the elastic shock-absorbing damping sheet and the elastic gasket, which can maximize the reduction of the noise generated by resonance between the noise reduction housing and the fan main body, and the elastic shock-absorbing damping sheet formed by continuous circular rings and the multi-piece elastic gasket structure stacked in a scale-like manner have good limiting damping and shock-absorbing effects, which can effectively avoid displacement of the fan main body in the noise reduction housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the utility model;

[0019] Figure 2 It is a structural schematic diagram of one side of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the other side of the utility model.

[0021] In the figure: left shell 1, right shell 2, silencer cover 3, first mounting groove 5, second mounting groove 6, through hole 7, first silencer plate layer 8, second silencer plate layer 9, elastic shock absorbing damping sheet 10, elastic gasket 11, connecting seat 12, supporting foot 13. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0023] Combination Figure 1-3 As shown, a low-noise blower comprises a noise reduction housing and a blower body, wherein the noise reduction housing comprises a left housing 1, a right housing 2 and a silencer cover 3 respectively fixed to the outside of the left housing 1 and the right housing 2;

[0024] The left shell 1 and the right shell 2 have a first mounting groove 5 corresponding to the fan body and a second mounting groove 6 corresponding to the fan outlet on their inner sides, and the middle of the two first mounting grooves 5 have a through hole 7, respectively. The two muffler covers 3 are respectively fixed on the outside of the two through holes 7 and cover the through holes 7 inside.

[0025] A first sound-absorbing board layer 8 and a second sound-absorbing board layer 9 are respectively attached to the first installation groove 5 and the second installation groove 6. The first sound-absorbing board layer 8 has a plurality of elastic shock-absorbing damping sheets 10 formed by continuous circular rings arranged in an inner circumference array. The second sound-absorbing board layer 9 has a plurality of elastic gaskets 11 stacked in a scale-like manner attached thereto.

[0026] The left shell 1 and the right shell 2 are fixed, and the fan body is installed between the left shell 1 and the right shell 2. The outer periphery of the fan body is in contact with each elastic shock-absorbing damping plate 10. The two sides of the fan body are respectively spaced apart from the through holes 7 of the left shell 1 and the right shell 2 to ensure smooth ventilation. The air outlet of the fan body is respectively fitted with each elastic gasket 11.

[0027] In the above structure, through holes 7 and silencer covers 3 are provided on both sides of the left shell 1 and the right shell 2 to facilitate air intake and avoid excessive impact on the air output of the fan main body. The fan main body and its air outlet are in contact with the elastic shock-absorbing damping sheet 10 and the elastic gasket 11. In fact, they are supported in a suspended state by the elastic shock-absorbing damping sheet 10 and the elastic gasket 11, which can maximize the reduction of noise generated by resonance between the noise reduction housing and the fan main body. The elastic shock-absorbing damping sheet 10 composed of a continuous circular ring and the multiple elastic gaskets 11 stacked in a scale-like manner have good limiting damping and shock-absorbing effects, which can effectively prevent the fan main body from being displaced in the noise reduction housing.

[0028] In another embodiment, a baffle structure and a silencer groove structure are provided in the silencer cover 3 to reduce the noise when the airflow enters the noise reduction housing. The specific structure of the silencer cover 3 and the patent with announcement number CN112483473A disclose similar structures, which will not be repeated here.

[0029] In another embodiment, hollow connecting columns are respectively provided on the left shell 1 and the right shell 2 at the periphery of the through hole 7, and the muffler cover 3 is connected to the hollow connecting columns by fixing bolts.

[0030] In another embodiment, a thickened rubber gasket is further provided between the hollow connecting column and the silencer cover 3 to avoid resonance between the silencer cover 3 and the noise reduction housing.

[0031] In another embodiment, silencers are respectively fixed on the air inlet and the air outlet of the fan body to further reduce the noise at the air inlet and the air outlet of the fan body. The silencer structure is prior art and its specific structure will not be described in detail.

[0032] In another embodiment, if Figure 1 As shown, the first sound-absorbing board layer 8 is composed of a plurality of arc-shaped sound-absorbing boards glued together by sound-proof glue.

[0033] In another embodiment, if Figure 1 As shown, the second sound-absorbing board layer 9 is composed of four rectangular sound-absorbing boards glued together by sound-proof glue.

[0034] In another embodiment, the left shell 1 and the right shell 2 are provided with corresponding slots and bayonet holes, and the left shell 1 and the right shell 2 are fixed by connecting bolts after being engaged with each other.

[0035] In another embodiment, in combination Figure 1-3 As shown, the outer peripheries of the left shell 1 and the right shell 2 also have corresponding connecting seats 12.

[0036] In another embodiment, in combination Figure 1-3 As shown, the bottoms of the left shell 1 and the right shell 2 are also provided with supporting feet 13 respectively.

Claims

1. A low noise blower, comprising a noise reduction housing and a blower body, characterized in that: The noise reduction housing is composed of a left housing (1), a right housing (2), and a sound-absorbing cover (3) respectively fixed on the outside of the left housing (1) and the right housing (2); The inner sides of the left shell (1) and the right shell (2) are respectively provided with a first mounting groove (5) corresponding to the fan body and a second mounting groove (6) corresponding to the fan outlet, the middle of the two first mounting grooves (5) are respectively provided with a through hole (7), and the two silencer covers (3) are respectively fixed on the outside of the two through holes (7) and cover the through holes (7) inside; A first sound-absorbing plate layer (8) and a second sound-absorbing plate layer (9) are respectively bonded in the first installation groove (5) and the second installation groove (6); a plurality of elastic shock-absorbing damping plates (10) formed of continuous circular rings are arrayed in the inner periphery of the first sound-absorbing plate layer (8); and a plurality of elastic gaskets (11) stacked in a scale-like manner are bonded in the second sound-absorbing plate layer (9); The left shell (1) and the right shell (2) are fixed to each other, the fan body is installed between the left shell (1) and the right shell (2), the outer periphery of the fan body is in contact with each elastic shock absorbing damping sheet (10), the two sides of the fan body are spaced apart from the through holes (7) of the left shell (1) and the right shell (2), and the air outlet of the fan body is in contact with each elastic gasket (11).

2. A low noise blower as claimed in claim 1, characterized in that: A baffle structure and a silencer groove structure are provided in the silencer cover (3).

3. A low noise blower as claimed in claim 2, characterized in that: Hollow connecting columns are respectively provided on the left shell (1) and the right shell (2) at the periphery of the through hole (7), and the muffler cover (3) is connected to the hollow connecting columns via fixing bolts.

4. A low noise blower as claimed in claim 3, characterized in that: A thickened rubber gasket is also provided between the hollow connecting column and the silencer cover (3).

5. A low noise blower as claimed in claim 4, characterized in that: A silencer is also fixed on the air inlet and the air outlet of the fan body respectively.

6. A low noise blower as claimed in claim 5, characterized in that: The first sound-absorbing board layer (8) is composed of a plurality of arc-shaped sound-absorbing boards glued together by sound-insulating glue.

7. A low noise blower as claimed in claim 6, characterized in that: The second sound-absorbing board layer (9) is composed of four rectangular sound-absorbing boards glued together by sound-insulating glue.

8. A low noise blower as claimed in claim 7, characterized in that: The left housing (1) and the right housing (2) are provided with corresponding slots and bayonet ports, and the left housing (1) and the right housing (2) are fixed together by connecting bolts after being engaged with each other.

9. A low noise blower as claimed in claim 8, characterized in that: The outer peripheries of the left shell (1) and the right shell (2) are also provided with corresponding connection seats (12).

10. A low noise blower as claimed in claim 9, characterized in that: The bottoms of the left shell (1) and the right shell (2) are also provided with supporting feet (13) respectively.

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