Draught fan for range hood and range hood

Abstract

The draught fan for the extractor hood comprises a volute, a motor and a centrifugal wind wheel, the volute is provided with an air outlet and comprises a front volute plate, a rear volute plate and a surrounding plate, the surrounding plate is provided with a plurality of silencing flow guide protrusions which are distributed in the axis direction and protrude from the outer surface to the inner surface, and the motor is arranged on the volute. The silencing flow guide protrusions extend to the air outlet wall plate at the tail end in the clockwise direction from the starting end in the clockwise direction. Compared with the prior art, the silencing and flow guiding structure is simple in structure and process, and due to flow guiding of the silencing and flow guiding protrusions and prevention of wall plate vibration, silencing and noise reduction are achieved.

Description

Technical Field

[0001] This utility model relates to range hoods, and more particularly to a fan for range hoods. Background Technology

[0002] The existing technology, Chinese patent 202323628498.X, provides a volute, a fan assembly, and a smoke hood. The volute includes a first plate, a second plate, a surrounding plate, and a silencer. The first and second plates are arranged opposite each other, and the surrounding plate connects between them. The first plate, second plate, and surrounding plate together form an air duct with an air outlet. The surrounding plate has a first hole area, a second hole area, and a spacer area. The first and second hole areas are located on opposite sides of the air outlet and separated by the spacer area. The silencer is disposed on the first and second hole areas. The silencer's placement in the first and second hole areas allows for more targeted noise reduction in areas with higher noise levels, achieving effective noise reduction while consuming less material. However, the problem is that the structure is complex and the efficiency is low. Utility Model Content

[0003] The purpose of this utility model is to provide a fan for a range hood that has the characteristics of simple structure, high manufacturing efficiency and noise reduction.

[0004] This invention is implemented as follows: a fan for a range hood, characterized in that it includes a volute, a motor, and a centrifugal impeller.

[0005] The volute is equipped with an air outlet and includes a front volute plate, a rear volute plate, and a surrounding plate.

[0006] The enclosure has several noise-reducing and air-guiding protrusions distributed along the axial direction, which bulge from the outer surface to the inner surface. The noise-reducing and air-guiding protrusions extend from the starting end in a clockwise direction to the air outlet wall panel at the ending end in a clockwise direction.

[0007] The fan used in the range hood is characterized in that: the air outlet is provided with a sound-absorbing and air-guiding protrusion on the wall panel adjacent to the clockwise starting end of the surrounding panel, which is arranged in the front-back direction and protrudes from the outer surface to the inner surface.

[0008] The special feature of the fan used in the range hood is that the side wall panel at the air outlet and the surrounding panel are integrally formed.

[0009] A range hood, characterized in that it includes a fan as described above for use with range hoods.

[0010] This utility model relates to a fan for a range hood, in which the noise-reducing and air-guiding protrusion is integrally formed with the surrounding plate. Compared with the prior art, the structure and process are simple. Due to the air-guiding and air-guiding protrusion and the prevention of wall plate vibration, noise reduction is achieved. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the present invention.

[0012] Figure 2 This is a rear view of the present invention.

[0013] Figure 3 This is one of the perspective views of this utility model.

[0014] Figure 4 This is the second perspective view of this utility model. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] like Figure 1 , Figure 2 As shown, a fan for a range hood includes a volute 1, a motor 2, and a centrifugal impeller 3.

[0018] The volute 1 is provided with an air outlet 11 and an annular seat plate 12, and includes a front volute plate 13, a rear volute plate 14 and a surrounding plate 15. The front volute plate 13 is provided with an air inlet; the motor 2 is fixed to the rear volute plate 14.

[0019] The enclosure 15 is provided with several sound-absorbing and air-guiding protrusions 151 distributed along the axial direction, bulging from the outer surface to the inner surface, such as... Figure 1 , Figure 3 As shown, the noise-reducing and airflow-guiding protrusion 151 extends from the starting end in a clockwise direction to the end end of the air outlet 11 wall panel in a clockwise direction. The noise-reducing and airflow-guiding protrusion 151 serves to guide airflow, prevent vibration of the enclosure 15, and reduce noise.

[0020] As a further improvement of this utility model: the wall panel 111 adjacent to the clockwise starting end of the air outlet 11 and the surrounding panel 15 is provided with a sound-absorbing and air-guiding protrusion 112 arranged in the front-back direction and convex from the outer surface to the inner surface.

[0021] As a further improvement of this utility model: the side wall panel at the air outlet 11 and the surrounding panel 15 are integrally formed.

[0022] A fume extractor, including a fan for a range hood as described above.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan for a range hood, characterized by: The fan comprises a scroll, a motor and a centrifugal wind wheel, The scroll is provided with an air outlet and comprises a front scroll plate, a rear scroll plate and a surrounding plate. The surrounding plate is provided with a plurality of sound-absorbing guide protrusions protruding from the outer surface to the inner surface and distributed along the axial direction, and the sound-absorbing guide protrusions extend from the starting end in the clockwise direction to the air outlet wall plate at the end in the clockwise direction.

2. A fan for a range hood according to claim 1, wherein: The wall plate adjacent to the starting end in the clockwise direction of the surrounding plate of the air outlet is provided with sound-absorbing guide protrusions protruding from the outer surface to the inner surface and arranged in the front-rear direction.

3. A range hood fan according to claim 1 or 2, characterized in that: The side wall plate at the air outlet and the surrounding plate are integrally formed.

4. A range hood characterized by: The fan for the range hood comprises the fan as claimed in any one of claims 1-3.

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