CN221220908U - Impeller of centrifugal fan and centrifugal fan - Google Patents

Abstract

The utility model discloses an impeller of a centrifugal fan and the centrifugal fan, wherein a front impeller disc of the centrifugal fan and a rear impeller disc which is opposite to the front impeller disc are provided with 15 backward inclined blades in a space between the front impeller disc and the rear impeller disc, the backward inclined blades take the center of the impeller as an axial circumferential array, the backward inclined blades partition the space between the front impeller disc and the rear impeller disc into 15 air channels, the width of each air channel is gradually increased from one side close to the center to one side close to the outer edge of the impeller, a first air channel opening is formed at one side close to the center of each air channel, a second air channel opening is formed at one side close to the outer edge of the impeller of each air channel, the opening angle corresponding to the first air channel opening is smaller than the opening angle corresponding to the second air channel opening, and the opening angle corresponding to the second air channel opening is 24 degrees. The utility model solves the problems of small wind power air quantity and large noise of the centrifugal fan provided by the impeller of the centrifugal fan in the related technology.

Description

Impeller of centrifugal fan and centrifugal fan

Technical Field

The utility model relates to the technical field of fans, in particular to an impeller of a centrifugal fan and the centrifugal fan.

Background

In the centrifugal fan in the related art, the impeller is driven to rotate by the motor, the blades in the impeller force the gas to rotate, so that the energy of the gas is increased, the gas is thrown out to the periphery of the impeller under the action of centrifugal force, the speed energy is converted into pressure energy by the volute casing, after the gas in the impeller is discharged, the pressure in the impeller is lower than the pressure in the air inlet, new gas is sucked into the impeller under the action of pressure difference, and the gas is continuously output from the outlet.

In the related art, the impeller of the centrifugal fan adopts a closed impeller, but the closed impeller in the related art has the advantages that the throughput of an air channel of the impeller is small due to unreasonable arrangement of blades, and the impeller can provide small wind pressure and small wind speed; meanwhile, when the motor power of the fan is increased to enable the fan to output rated wind speed, the impeller in the related art has large shaking during running and large noise of the centrifugal fan.

Aiming at the problems of small wind power and large noise of the centrifugal fan provided by the impeller of the centrifugal fan in the related art, a better technical scheme is not yet available.

Disclosure of utility model

In view of this, there is a need to provide an impeller of a centrifugal fan and a centrifugal fan, so as to at least solve the problems of small wind volume and large noise of the centrifugal fan provided by the impeller of the centrifugal fan in the related art.

In a first aspect, the present utility model provides a technical solution as follows: the impeller of the centrifugal fan comprises a front wheel disc and a rear wheel disc which is opposite to the front wheel disc, 15 backward inclined blades are arranged in the space between the front wheel disc and the rear wheel disc, the center of the backward inclined blades is used as an axis circumferential array, the space between the front wheel disc and the rear wheel disc is partitioned into 15 air channels by the backward inclined blades, the width of each air channel is gradually increased from one side close to the center to one side close to the outer edge of the impeller, a first air channel opening is formed in one side of each air channel close to the center, a second air channel opening is formed in one side of each air channel close to the outer edge of the impeller, the opening angle corresponding to the first air channel opening is smaller than the opening angle corresponding to the second air channel opening, and the opening angle corresponding to the second air channel opening is 24 degrees.

In the impeller of the centrifugal fan, the set number of backward inclined blades are arranged, the length of blade flow guide is prolonged through the arc-shaped surface of the backward inclined blades, and the air channel with the width gradually increasing from one side close to the center to one side close to the outer edge of the impeller is formed through the two adjacent backward inclined blades, so that the air throughput of the impeller is improved, and the problems that the wind power air volume provided by the impeller of the centrifugal fan is small and the noise of the centrifugal fan is large in the related art are solved through the impeller.

In one embodiment, in order to improve throughput of the impeller, a side of the back-tilting blade near the center is provided with a tilting side surface tilting from the center to an outer edge of the impeller, and the tilting angle of the tilting side surface is 60 ° to 70 °.

So set up, adopt one side that is close to the center with the wind channel to set up the inclined plane, reduce the back and incline the blade and to the blocking of wind channel front end part, increase the space of wind channel and wind chamber intercommunication, improve centrifugal fan and throw away initial amount of wind along the wind channel, and then improve impeller's amount of wind throughput ability.

In one embodiment, for realizing the assembly of the backward inclined blade, the front wheel disc and the rear wheel disc, a plurality of riveting holes are formed in two sides of the backward inclined blade in the width direction, corresponding mortises are formed in the matched positions of the front wheel disc and the rear wheel disc, and the riveting holes are riveted into the corresponding mortises so that the front wheel disc and the rear wheel disc are in riveting connection.

In one embodiment, in order to further improve throughput and air throughput of the fan, an included angle between a tangent line corresponding to an orthographic projection point of the outer edge line of the backward inclined blade on the rear wheel disc and a rotation direction of the impeller is equal to or greater than 144 degrees and equal to or less than 150 degrees.

The tangential angle between the tangential line corresponding to the orthographic projection point of the outer edge line of the backward inclined blade on the rear wheel disc and the rotation direction of the impeller is the largest, so that the throughput capacity and the air throughput of the impeller are improved.

In one embodiment, the radial width of the camber blade is 35mm to 40mm.

In one embodiment, the front and rear wheels have a thickness of 3mm to 5mm.

In a second aspect, embodiments of the present application also provide a centrifugal fan including the impeller of the first aspect.

Drawings

FIG. 1 is a perspective view of an impeller according to an embodiment of the present application;

FIG. 2 is another perspective view of an impeller according to an embodiment of the present application;

FIG. 3 is an exploded view of an impeller according to an embodiment of the present application;

FIG. 4 is a schematic view illustrating the structural relationship between a camber blade and a front and rear disk according to an embodiment of the present application;

FIG. 5 is a schematic view of an embodiment of the present application with the front wheel disc removed;

FIG. 6 is a schematic view of a camber blade according to an embodiment of the present application.

Reference numerals:

100. A front wheel disc;

200. a rear wheel disc; 201. mortises

300. Backward tilting the blade; 301. an inclined side; 302. riveting holes;

400. An air duct; 401. a first duct opening; 402. and a second air duct opening.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, an impeller of a centrifugal fan according to an embodiment of the present application includes a front wheel disc 100 and a rear wheel disc 200 opposite to the front wheel disc 100, wherein 15 backward inclined blades 300 are disposed in a space between the front wheel disc 100 and the rear wheel disc 200, the backward inclined blades 300 are circumferentially arrayed with a center of the impeller as an axis, the backward inclined blades 300 partition the space between the front wheel disc 100 and the rear wheel disc 200 into 15 air channels 400, and a width of each air channel 400 increases gradually from a side near the center to a side near an outer edge of the impeller, wherein a first air channel opening 401 is formed on a side near the center of each air channel 400, a second air channel opening 402 is formed on a side near the outer edge of the impeller of each air channel 400, an opening angle corresponding to the first air channel opening 401 is smaller than an opening angle corresponding to the second air channel opening 402, and an opening angle corresponding to the second air channel opening 402 is 24 °.

In this embodiment, the opening angle corresponding to the first air duct opening 401 is preferably 22.5 °.

In the impeller of the centrifugal fan, the length of the blade guide is prolonged by arranging a set number of backward inclined blades 300 and the arc-shaped surface of the backward inclined blades 300, and the air duct 400 with the width gradually increasing from the side close to the center to the side close to the outer edge of the impeller is formed by two adjacent backward inclined blades 300, so that the air throughput of the impeller is improved.

In this embodiment, two adjacent backward inclined blades 300 are adopted to form a lunar flap-shaped air duct, and the width of the air duct 400 is gradually increased from the side close to the center to the side close to the outer edge of the impeller, so that the air quantity thrown out along the air duct 400 is ensured to be large, and the throughput and the air quantity throughput of the fan are improved.

It should be further noted that, with the increase of the camber of the backward tilting blade 300, the corresponding length of the backward tilting blade 300 is lengthened, the equivalent diameter on the impeller is increased, the air volume of the air duct 400 formed by two adjacent backward tilting blades 300 is increased, and the large air volume is provided under the condition of providing the same number of backward tilting blades.

To further achieve improved throughput and air throughput of the centrifugal fan, in one embodiment, the side of the backward inclined blade 300 near the center (center of the impeller) is provided with an inclined side 301 inclined from the center to the outer edge of the impeller, and the inclined side 301 is inclined at an angle of 60 ° to 70 °.

It will be appreciated that, by adopting the arrangement that the adjacent backward inclined blades 300 are adopted to enclose and form the air duct in a lunar flap shape, the aperture of the opening of the fan-shaped air duct 34 from inside to outside is gradually increased, the spiral winding of silk thread scraps in the air suction process is blocked by the straight blade type blades 33, and meanwhile, the large air quantity of air thrown out along the fan-shaped air duct 34 is ensured, so that the throughput and the air throughput of the fan are improved.

In order to assemble the backward inclined blade 300 with the front wheel disc 100 and the rear wheel disc 200, in one alternative embodiment, a plurality of rivets 302 are provided on both sides of the backward inclined blade 300 in the width direction, corresponding mortises 201 are provided at matched positions of the front wheel disc 100 and the rear wheel disc 200, and the rivets 302 are riveted into the corresponding mortises 201, so that the front wheel disc 100 is riveted with the rear wheel disc 200.

To further achieve improved fan throughput and air volume throughput, in some embodiments, the angle between the tangent line corresponding to the forward projection point of the outer edge line of the backward inclined blade 300 on the rear wheel disc 200 and the rotation direction of the impeller is equal to or greater than 144 degrees and equal to or less than 150 degrees, and preferably 144.5 degrees.

It can be understood that the arrangement is that the tangential angle between the tangential line corresponding to the orthographic projection point of the edge line of the outer side of the blade on the rear wheel disc and the rotation direction of the impeller is the largest, so that the wind throwing speed, the wind throughput capacity and the throughput of the impeller are improved, and the purposes of outputting large wind quantity under unit power consumption and saving energy consumption are achieved.

In the present embodiment, referring to fig. 4, the backward inclined blade 300 refers to an angle between the outer edge line of the backward inclined blade 300 and the tangential forward direction of the rotation direction of the blade at the intersection point (refer to the point M shown in fig. 4) in the radial section of the impeller, and the installation direction of the backward inclined blade 300 is opposite to the rotation direction of the impeller; it should be noted that, by adopting the backward inclined blade 300, the impeller has high rotation speed, large air quantity, high air outlet efficiency, and difficult scaling and overload.

For assembly and assembly of the fan wheel, in one embodiment, referring to fig. 5, the radial width of the camber blade 300 is 35mm to 40mm.

In one embodiment, referring to FIG. 4, the front and rear wheels 100 and 200 have a thickness of 3mm to 5mm.

The embodiment of the application also provides a centrifugal fan, which comprises an impeller, wherein the impeller is the impeller of the centrifugal fan in the embodiment.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (2)

1. The utility model provides an impeller of centrifugal fan, its characterized in that includes front rim plate (100) and with rear rim plate (200) that front rim plate (100) just set up just are equipped with 15 back tilt blades (300) in the space of front rim plate (100) with rear rim plate (200) spaced, back tilt blades (300) regard the center of impeller as the axle center circumference array, back tilt blades (300) will front rim plate (100) with space partition of rear rim plate (200) becomes 15 wind channel (400), the width of wind channel (400) increases gradually from the one side that is close to the center to the one side that is close to the impeller outward flange, wherein, every wind channel (400) is close to center one side shaping has first wind channel mouth (401), and every wind channel (400) is close to impeller outward flange one side shaping has second wind channel mouth (402), the opening angle that first wind channel mouth (401) corresponds is less than the opening angle that second wind channel mouth (402) corresponds, first wind channel mouth (100) spaced space partition 15 wind channels (400), the width of wind channel (400) increases gradually from the one side that is close to the center side of impeller outward flange (301), wherein the opening angle that is corresponding to the first wind channel mouth (401) is that is corresponding to the opening angle of the wind channel mouth (301), the opening angle is 60), the side that is 60 ° (301 °). A plurality of rivet holes (302) are formed in two sides of the backward inclined blade (300) in the width direction, corresponding mortises (201) are formed in matched positions of the front wheel disc (100) and the rear wheel disc (200), and the rivet holes (302) are riveted into the corresponding mortises (201) so that the front wheel disc (100) and the rear wheel disc (200) are in rivet connection; the included angle between the tangent line corresponding to the orthographic projection point of the outer edge line of the backward inclined blade (300) on the rear wheel disc (200) and the rotation direction of the impeller is 144.5 degrees; the radial width of the backward inclined blade (300) is 35mm to 40mm; the front wheel disc (100) and the rear wheel disc (200) have a thickness of 3mm to 5mm.

2. A centrifugal fan comprising an impeller, wherein the impeller comprises the centrifugal fan impeller of claim 1.