CN215860901U

CN215860901U - Centrifugal fan

Info

Publication number: CN215860901U
Application number: CN202122317294.9U
Authority: CN
Inventors: 滕可可
Original assignee: Zhouzhou Machinery Co ltd
Current assignee: Zhouzhou Machinery Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-02-18
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses a centrifugal fan which comprises a base, a volute, a motor, an air outlet assembly and a base. The volute is arranged on the base, an air suction opening and a motor are respectively arranged at two ends of the volute, an impeller is arranged in the volute, and the impeller is arranged on an output shaft of the motor; a notch is arranged on the side surface of the volute, and a slide rail is arranged on the notch; the air outlet assembly is arranged on the sliding rail; the air outlet assembly comprises an air outlet and a sliding door, and the sliding door is arranged on the front side and the rear side of the air outlet; the air outlet is tangent to the notch, and when the air outlet slides along the sliding rail, the sliding door is unfolded or closed along with the sliding of the air outlet. The air outlet is arranged, the air outlet angle can be changed by folding the folding doors on the two sides of the air outlet, the changing direction is set according to the number of the folding doors, the structure is simple, the use is convenient, in addition, the added universal wheels are convenient to carry, and the use requirement can be well met.

Description

Centrifugal fan

Technical Field

The utility model relates to the field of mechanical equipment, in particular to a centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

The air outlet direction of the existing centrifugal fan is determined and fixed when leaving a factory. In order to change the air outlet direction of the centrifugal fan, most of the prior art adopts an external tee joint and then switches of different air ducts to change the air outlet direction, but the mode increases the construction difficulty, and the direction angle of the fan needs to be changed under the condition of not walking the air duct, which is inconvenient;

in addition, in the prior art, there is a double air outlet, which changes the air outlet direction by opening air doors to different air outlets, for example, in documents CN 104963894A-a one-inlet two-outlet volute type centrifugal fan-publication, and documents CN 203175991-a double-outlet half volute type centrifugal fan-publication, CN 104314880A-a centrifugal fan system and an air conditioner-publication, etc., this way changes the air outlet direction, but the direction is still fixed, and the change of the air outlet direction is small; moreover, in the above document, two joints need to be arranged on the casing, which increases the volume of the fan and is not beneficial to carrying.

SUMMERY OF THE UTILITY MODEL

The present invention aims to provide a centrifugal fan which can solve one or more of the above technical problems.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

a centrifugal fan comprises a base, a volute, a motor and an air outlet assembly.

The volute is installed on the base, the two ends of the volute are respectively provided with an exhaust inlet and a motor, an impeller is installed in the volute, and the impeller is installed on an output shaft of the motor.

A notch is arranged on the side surface of the volute, and a slide rail is arranged on the notch; the air outlet assembly is arranged on the sliding rail;

the air outlet assembly comprises an air outlet and a sliding door, and the sliding door is arranged on the front side and the rear side of the air outlet;

the air outlet is tangent to the notch, and when the air outlet slides along the sliding rail, the sliding door is unfolded or closed along with the sliding of the air outlet.

Preferably: the sliding door at least comprises an arc door panel at each of the front side and the rear side of the sliding direction of the air outlet.

Preferably: and a limiting block is arranged between every two adjacent door plates.

Preferably: and sealing strips are respectively arranged between the door plate and the sliding rail and between two adjacent door plates.

Preferably: the locking block assembly comprises a positioning barrel and an elastic positioning pin; the volute is provided with a plurality of positioning cylinders, the elastic positioning pins are hinged to the air outlet and inserted into different positioning cylinders to match the rotation of the air outlet.

Preferably: the base comprises a vertical plate and a bottom plate, and a universal wheel is arranged below the bottom plate and is a self-locking universal wheel.

Preferably: the volute is formed by welding after a plate is cut by laser.

The utility model has the technical effects that:

the air outlet is arranged, the air outlet angle can be changed by folding the folding doors on the two sides of the air outlet, the changing direction is set according to the number of the folding doors, the structure is simple, the use is convenient, in addition, the added universal wheels are convenient to carry, and the use requirement can be well met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In the drawings:

fig. 1 is a schematic view of the general structure of the present invention.

Fig. 2 is a schematic diagram of a portion of the exploded structure of fig. 1.

Fig. 3 is a schematic structural view of the use state of fig. 1.

Fig. 4 is a schematic structural diagram of the second embodiment.

Detailed Description

The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided only for the purpose of illustrating the present invention and are not to be construed as unduly limiting the utility model.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Example one

As shown in fig. 1-3, a centrifugal fan includes a base 1, a volute 2, a motor 3, and an air outlet assembly 4.

The volute 2 is mounted on the base 1. The two ends of the volute 2 shaft are respectively provided with an air suction opening 201 and a motor 3. An impeller is installed in the volute and is installed on an output shaft of the motor 3.

A notch 202 is arranged on the side surface of the volute 2, and a slide rail 203 is arranged on the notch 202; the air outlet assembly 4 is mounted on the slide rail 203.

The air outlet assembly 4 comprises an air outlet 401 and a sliding door 402, and the sliding door 402 is arranged on the front side and the rear side of the air outlet 401. The air outlet 401 is tangent to the notch 202, and when the air outlet slides along the slide rail, the sliding door is unfolded or closed along with the sliding of the air outlet.

As shown in fig. 4, a sliding door is respectively arranged at the front side and the rear side of the sliding direction of the air outlet in fig. 4. The arc length of the single sliding door is basically equal to that of the notch.

As shown in fig. 3, in the sliding door composed of a plurality of door panels, a limit block is arranged between two adjacent door panels. When the door plate extends out, the limiting blocks are pulled out one by one; the door plates are pushed back one by one when being withdrawn. The limiting block effectively ensures the complete sealing of the volute from air inlet to air outlet. In addition, sealing strips are respectively arranged between the door plates and the sliding rail and between two adjacent door plates. The air quantity is not lost.

In certain embodiments, it is preferred that: the locking block assembly comprises a positioning barrel and an elastic positioning pin; the volute is provided with a plurality of positioning cylinders, the elastic positioning pins are hinged to the air outlet and inserted into different positioning cylinders to match the rotation of the air outlet. The drawings are not provided, and in a specific manner, a positioning cylinder (a steel pipe with a length of about 3 cm) concentric with the slide rail is welded outside the volute, then an elastic positioning pin is installed on the air outlet, and when the volute rotates to a corresponding angle, the elastic pin is inserted into the steel pipe for positioning.

In some embodiments, the locking block assembly may take other forms or be omitted, and after the air outlet direction is adjusted, the locking block assembly is directly butted with a certain air duct to be fixed, so that locking is not required.

The volute is formed by welding after a plate is cut by laser. Simple structure and convenient processing and manufacturing.

Example two

As shown in fig. 1-4, the base comprises a vertical plate and a bottom plate, a universal wheel 5 is arranged below the bottom plate, and the universal wheel 5 is a self-locking universal wheel. The fan is convenient to move and more convenient to use due to the universal wheels.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A centrifugal fan, its characterized in that: comprises a base, a volute, a motor and an air outlet assembly;

the volute is installed on the base, an air suction opening and a motor are respectively arranged at two ends of the volute, an impeller is installed in the volute, and the impeller is installed on an output shaft of the motor;

2. The centrifugal fan of claim 1, wherein: the sliding door at least comprises an arc door panel at each of the front side and the rear side of the sliding direction of the air outlet.

3. The centrifugal fan of claim 2, wherein: and a limiting block is arranged between every two adjacent door plates.

4. The centrifugal fan of claim 3, wherein: and sealing strips are respectively arranged between the door plate and the sliding rail and between two adjacent door plates.

5. The centrifugal fan of claim 4, wherein: the locking block assembly comprises a positioning barrel and an elastic positioning pin; the volute is provided with a plurality of positioning cylinders, the elastic positioning pins are hinged to the air outlet and inserted into different positioning cylinders to match the rotation of the air outlet.

6. The centrifugal fan of claim 5, wherein: the base comprises a vertical plate and a bottom plate, and a universal wheel is arranged below the bottom plate and is a self-locking universal wheel.

7. The centrifugal fan of claim 6, wherein: the volute is formed by welding after a plate is cut by laser.