Wooden box type centrifugal fan

Abstract

The utility model relates to a wooden box type centrifugal fan which comprises a wooden box body and a volute fan arranged in the wooden box body, a silencing layer is arranged on the inner side of the wooden box body, two air ports are formed in the wooden box body, and an air inlet and an air outlet of the volute fan are respectively communicated with the two air ports of the wooden box body. According to the wooden box type centrifugal fan, resonance and reflection of noise are reduced through the wooden box, meanwhile, under the combined action of internal silencing cotton, the box body has the good silencing performance, noise is further reduced, the size of the box body is reduced due to the fact that the worm wheel fan with the small impeller size is used, and the size of the box body is reduced. And the performance of the product is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and particularly relates to a wooden box type centrifugal fan. Background Art

[0002] Existing centrifugal fume hoods include a box body, an air inlet, a casing, an impeller, a motor, and a motor frame. As ventilation becomes popular, various supporting fume hoods on the market, as supporting equipment for ventilation systems, are difficult to meet the increasing needs of customers due to factors such as large size and high noise. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a wooden box type centrifugal fan to address the deficiencies in the prior art, which can reduce the size of the centrifugal fume hood and reduce the noise of the centrifugal fume hood.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The wooden box type centrifugal fan comprises a wooden box body and a volute fan arranged inside the wooden box body. A sound-absorbing layer is arranged inside the wooden box body. Two air outlets are opened on the wooden box body. The air inlet and the air outlet of the volute fan are respectively connected to the two air outlets of the wooden box body.

[0006] In order to better realize the utility model, further optimization is made in the above structure. The volute fan includes a motor, a casing and an impeller arranged in the casing. The motor and the impeller are connected and driven by a shaft sleeve.

[0007] In order to better realize the utility model, further optimization is made in the above structure, the tail of the motor is fixedly arranged on the wooden box through an annular support frame, and is fixedly arranged on the wooden box through screws.

[0008] In order to better realize the utility model, further optimization is made in the above structure, and the casing is a logarithmic spiral casing of the equilateral base circle method.

[0009] In order to better realize the utility model, further optimization is made in the above structure, and the impeller is a forward-curved, forward-facing, multi-blade, double-inlet centrifugal impeller.

[0010] In order to better realize the utility model, further optimization is made in the above structure, and the two air outlets of the wooden box are arranged perpendicular to each other.

[0011] In order to better realize the utility model, further optimization is made in the above structure, and the sound-absorbing layer is made of sound-absorbing cotton.

[0012] In order to better realize the utility model, further optimization is made in the above structure, and the wooden box body is made of medium-density fiberboard.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The wooden box type centrifugal fan provided by the utility model utilizes a wooden box to reduce the resonance and reflection of noise. At the same time, with the joint effect of the internal sound-absorbing cotton, the box body has good sound-absorbing performance, further reducing the noise. In addition, a worm wheel fan with a smaller impeller size is used to reduce the size of the box body, so that the performance of the product is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 only 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.

[0016] Figure 1 This is a schematic diagram of the external structure of the wooden box type centrifugal fan of the utility model;

[0017] Figure 2 It is an exploded view of the wooden box type centrifugal fan of the utility model.

[0018] In the figure:

[0019] 1- wooden box, 101- air outlet, 2- volute fan, 201- motor, 202- casing, 203- impeller, 3- sound-absorbing layer, 4- support frame, 5- shaft sleeve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. 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 implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] Reference Figure 1 and Figure 2 The wooden box type centrifugal fan provided by the utility model comprises a wooden box body 1 and a volute fan 2 arranged inside the wooden box body 1. The wooden box body 1 is made of medium-density fiberboard, and the internal structure of the board is uniform, the density is moderate, the dimensional stability is good, the deformation is small, and the physical and mechanical properties are moderate. A sound-absorbing layer 3 is arranged on the inner side of the wooden box body 1. In this embodiment, the sound-absorbing layer 3 is made of sound-absorbing cotton, and the wooden box is used to reduce the resonance and reflection of the noise generated when the fan is working. At the same time, under the joint action of the internal sound-absorbing cotton, the box body has good sound-absorbing performance, which further reduces the noise. Two air vents 101 are opened on the wooden box body 1. The air inlet and the air outlet of the volute fan 2 are respectively connected to the two air vents 101 of the wooden box body 1. The two air vents 101 of the wooden box body 1 are arranged perpendicular to each other and connected to the air inlet and the air outlet of the volute fan 2 with the shortest distance, reducing wind loss, thereby completing air intake and air supply.

[0024] The volute fan 2 includes a motor 201, a housing 202, and an impeller 203 disposed in the housing 202. The volute fan 2 can effectively occupy a smaller area due to the smaller size of the impeller 203, thereby reducing the size of the wooden box 1. The motor 201 and the impeller 203 are directly connected and driven by the shaft sleeve 5, eliminating the relatively large motor seat and reducing the space occupied by the cabinet.

[0025] The tail of the motor 201 is fixed on the wooden box 1 through the annular support frame 4, and is fixed on the wooden box 1 through screws. The annular support frame 4 can provide stable support for the motor 201 and ensure the heat dissipation of the motor 201, so that the external air can smoothly enter the motor 201 for heat dissipation to prevent overheating. The casing 202 is a logarithmic spiral casing of the equilateral base circle method. The impeller 203 is a forward-bent forward multi-blade double-inlet centrifugal impeller.

[0026] When working, start the volute fan 2, the air enters from one of the air outlets 101 on the wooden box 1, and is discharged from the other air outlet 101 on the wooden box 1 under the traction of the volute fan 2. The noise generated during operation is reduced under the action of the wooden box 1 and the sound-absorbing cotton, thereby achieving the effect of silent ventilation.

[0027] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. Wooden box type centrifugal fan, characterized by: The invention comprises a wooden box (1) and a volute fan (2) arranged inside the wooden box (1); a sound-absorbing layer (3) is arranged inside the wooden box (1); two air vents (101) are provided on the wooden box (1); and an air inlet and an air outlet of the volute fan (2) are respectively connected to the two air vents (101) of the wooden box (1).

2. The wooden box type centrifugal fan according to claim 1, characterized in that: The volute fan (2) comprises a motor (201), a casing (202), and an impeller (203) arranged in the casing (202); the motor (201) and the impeller (203) are connected and driven by a shaft sleeve (5).

3. The wooden box type centrifugal fan according to claim 2, characterized in that: The tail of the motor (201) is fixedly arranged on the wooden box (1) via an annular support frame (4), and is also fixedly arranged on the wooden box (1) via screws.

4. The wooden box type centrifugal fan according to claim 3, characterized in that: The housing (202) is a logarithmic spiral housing of the equilateral base circle method.

5. The wooden box type centrifugal fan according to claim 4, characterized in that: The impeller (203) is a forward-curved, forward-facing, multi-blade, double-inlet centrifugal impeller.

6. The wooden box type centrifugal fan according to any one of claims 1 to 5, characterized in that: The two air outlets (101) of the wooden box (1) are arranged perpendicular to each other.

7. The wooden box type centrifugal fan according to claim 6, characterized in that: The sound-absorbing layer (3) is made of sound-absorbing cotton.

8. The wooden box type centrifugal fan according to claim 7, characterized in that: The wooden box (1) is made of medium-density fiberboard.

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