CN101413515A

CN101413515A - Centrifugal fan

Info

Publication number: CN101413515A
Application number: CNA2007101239880A
Authority: CN
Inventors: 黄清白; 赵志辉; 张文杰
Original assignee: Hong Jun Precision Industry Co ltd; Fuzhun Precision Industry Shenzhen Co Ltd
Current assignee: Hong Jun Precision Industry Co ltd; Fuzhun Precision Industry Shenzhen Co Ltd
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2009-04-22
Also published as: US20090104031A1

Abstract

The invention discloses a centrifugal fan. The fan comprises a fan frame and an impeller received in the fan frame, wherein the fan frame is provided with a first air inlet, an air outlet and a tongue part close to the air outlet as well as a protrusion which is positioned in the air inlet and close to the tongue part. The centrifugal fan comprises a fan frame and an impeller received in the fan frame, wherein the fan frame comprises a cover plate, a bottom plate and a side wall arranged between the cover plate and the bottom plate, the impeller is arranged in a space enclosed by the cover plate, the bottom plate and the side wall, the side wall is provided with an air outlet and a tongue part close to the air outlet, the cover plate is provided with a first air inlet and a protrusion positioned in the first air inlet, and the bottom plate is provided with a vent close to the tongue part. The protrusion is arranged in the first air inlet to reduce air intake in the first air inlet, so the influence of redundant air on the tongue part is reduced and noises are further reduced.

Description

Centrifugal cutter

Technical field

The present invention relates to a kind of centrifugal cutter, be meant a kind of centrifugal cutter that has than low noise especially.

Background technique

Current, along with developing rapidly of computer industry, the heat that the heat-generating electronic elements such as chip in the notebook computer produce is more and more many.For the heat that these are unnecessary effectively distributes, existing method is the radiator that is sticked on the surface of heat-generating electronic elements, one centrifugal cutter is set on this radiator then, the cooling blast that utilizes this centrifugal cutter to produce carries out forced heat radiation to this radiator, thereby the heat that heat-generating electronic elements is produced leaves.Because the size of air-flow that fan produces depends on the rotating speed of fan,, must increase the speed of rotation of fan for the performance that makes fan is further improved.But the noise that rotation speed of the fan will cause fan to produce when improving increases considerably, and near the user who is positioned at this centrifugal cutter is not felt well, and can't stand even.

As shown in Figure 3, one centrifugal cutter comprises a fan frame 10 and is contained in impeller 20 in this fan frame 10, this fan frame 10 is provided with first wind inlet 12 and second wind inlet 14 respectively in end face and bottom surface, close on the inwardly outstanding tongue 16 that forms in exhaust outlet place in sidewall, impeller 20 is provided with some flabellums 26 in wheel hub 22 peripheries, also be connected with a disk 24 on this impeller 20, this disk 24 is sticked at the terminal of flabellum 26 and is positioned at the upside of flabellum 26, because flabellum 26 is nearest with tongue 16, when wind can produce unnecessary air quantity at tongue 16 when first wind inlet 12 and second wind inlet 14 enter, unnecessary air quantity is squeezed disturbance and causes noise at tongue 16 places.

Summary of the invention

In view of this, be necessary to provide a kind of centrifugal cutter that has than low noise.

A kind of centrifugal cutter comprises that a fan frame and is contained in the impeller in this fan frame.This fan frame is provided with one first wind inlet, an exhaust outlet and one and the tongue that closes on of this exhaust outlet.Wherein, this fan frame is provided with a projection that is positioned at this first wind inlet, and this projection is closed on this tongue.

A kind of centrifugal cutter comprises that a fan frame and is contained in the impeller in this fan frame.This fan frame comprises that a cover plate, a base plate and be located at the sidewall between this cover plate and this base plate, and this impeller is positioned at the space that this cover plate, base plate and this sidewall surrounds.This sidewall is provided with an exhaust outlet and one and the tongue that closes on of this exhaust outlet.This cover plate is provided with the projection that one first intake grill and is positioned at this first wind inlet, and this base plate is provided with a vent hole that closes on this tongue.

Compared with prior art, centrifugal cutter of the present invention is provided with projection in first wind inlet, can reduce the air output in first wind inlet, thereby reduce unnecessary air quantity in the tongue disturbance, and then reduce noise; In addition, near the centrifugal cutter tongue, establish through hole, can in time get rid of the unnecessary air quantity that extruding is herein piled up, thereby reduce noise.

Description of drawings

Fig. 1 is the three-dimensional combination figure of centrifugal cutter one preferred embodiment of the present invention.

Fig. 2 is the three-dimensional exploded view of centrifugal cutter among Fig. 1.

Fig. 3 is the three-dimensional exploded view of a centrifugal cutter in the background technique.

Embodiment

See also Fig. 1 and Fig. 2, be respectively the solid combination and the exploded view of the centrifugal cutter of a preferred embodiment of the present invention, this centrifugal cutter can be used for heat-generating electronic elements is dispelled the heat with a sink (figure does not show) combination.

This centrifugal cutter comprises that a fan frame 100 and is contained in the impeller 200 in this fan frame 100.This impeller 200 comprises that a wheel hub 220 reaches the some blades 240 that outwards are radial extension by these wheel hub 220 peripheries, and described blade 240 is clockwise direction, and blade 240 ends are counterclockwise crooked.

This fan frame 100 comprises that a cover plate 120, a base plate 140 and be located at the sidewall 160 between this cover plate 120 and this base plate 140.Wherein, this sidewall 160 is the semi-enclosed structures that extend upward formation from these base plate 140 peripheries, and it comprises that an arcuation face 162 and faces 164 directly.Offer an exhaust outlet 180 on this sidewall 160, approach this exhaust outlet 180 and be in a tongue 190 is set on this arcuation face 162, these tongue 190 ecto-entads are outstanding and extend in this exhaust outlet 180.

This cover plate 120 is removably mounted on this sidewall 160 and makes this impeller 200 be located in the space that this cover plate 120, base plate 140 and this sidewall 160 surround.

The shape of this cover plate 120 is similar to the shape of base plate 140, offer one first wind inlet 122 in the middle of the described cover plate 120, and this base plate 140 is provided with one second wind inlet 142.On this cover plate 120, be formed with a projection 124 that is positioned at this first wind inlet 122, this projection 124 is closed on this tongue 190 and is stretched in this first wind inlet 122, make this first wind inlet 122 reduce over against the area at these tongue 190 places, thereby reduce the air output in this first wind inlet 122, particularly close on the air output at these tongue 190 places, and then reduce the noise of this centrifugal cutter.

During work, air-flow rotated together around this impeller 200 drove, extraneous air-flow enters in this fan frame 100 from first wind inlet 122 and second wind inlet 142 on this base plate 140 on this cover plate 120, and along with the rotation of blade 240, the air-flow in this fan frame 100 is discharged from exhaust outlet 180.Owing on this cover plate 120, close on these tongue 190 places the projection 124 that is stretched in this first wind inlet 122 is set, make from this air-flow that enters and reduce, thereby reduce the unnecessary air-flow of piling up at tongue 190 places, and then reduce owing to the unnecessary air-flow noise that disturbance causes that is squeezed at these tongue 190 places.

In the above-described embodiments, this projection 124 is closed on this tongue 190; In actual use, also can make this projection be arranged on away from this tongue part, also can reduce the noise of centrifugal cutter to a certain extent to reduce the air output at the first wind inlet place.

For further reducing the noise of this centrifugal cutter, two through holes 148 can be set on this base plate 140.As shown in Figure 2, these through hole 148 ovalizes, between tongue 190 and blade 240 ends, and this through hole 148 near tongues 190 and along the arc of arcuation face 162 to configuration arranged side by side.The quantity of this through hole 148 and shape can change according to specific embodiments, but the position will be located on the base plate 140, and close on tongue 190.Unnecessary air-flow between blade 240 and the tongue 190 can in time be discharged by this through hole 148, thereby prevents air-flow in the accumulation disturbance of tongue 190 places, and then reduces noise.

For further reducing the noise of this centrifugal cutter, a baffle plate 144 that is positioned at this second wind inlet 142 can be set on this base plate 140.As shown in Figure 2, this baffle plate 144 closes on this tongue 190 and relative up and down with the projection 124 on this cover plate 120, and makes this through hole 148 between this baffle plate 144 and this tongue 190.By this baffle plate 144, can reduce the air output in this second wind inlet 142, particularly close on the air output at these tongue 190 places, and then reduce the noise of this centrifugal cutter.

In sum, among the present invention by projection 124 and baffle plate 144 are set respectively on cover plate 120 and base plate 140, can reduce the air output in this first wind inlet 122 and this second wind inlet 142, thereby reduce the unnecessary air-flow of piling up at tongue 190 places, and then reduce owing to the unnecessary air-flow noise that disturbance causes that is squeezed at these tongue 190 places; Moreover, by on this base plate 140, through hole 148 being set, the unnecessary air-flow between blade 240 and the tongue 190 in time can be discharged, thereby prevent that air-flow from the accumulation disturbance of tongue 190 places, further reducing noise.

Claims

1. centrifugal cutter, comprise that a fan frame and is contained in the impeller in this fan frame, this fan frame is provided with one first wind inlet, an exhaust outlet and one and the tongue that closes on of this exhaust outlet, it is characterized in that: this fan frame is provided with a projection that is positioned at this first wind inlet, and this projection is closed on this tongue.

2. centrifugal cutter as claimed in claim 1 is characterized in that: also be provided with the baffle plate that one second wind inlet and is positioned at this second wind inlet on this fan frame.

3. centrifugal cutter as claimed in claim 2 is characterized in that: this projection is relative up and down with this baffle plate.

4. centrifugal cutter as claimed in claim 1 is characterized in that: this fan frame comprises that a cover plate, a base plate and be located at the sidewall between this cover plate and this base plate, and this impeller is positioned at the space that this cover plate, base plate and this sidewall surrounds; This first intake grill is located on this cover plate, and this exhaust outlet and this tongue are formed on this sidewall.

5. centrifugal cutter as claimed in claim 4 is characterized in that: this base plate is provided with at least one vent hole that closes on this tongue.

6. centrifugal cutter as claimed in claim 4 is characterized in that: this base plate is provided with the baffle plate that one second wind inlet and is positioned at this second wind inlet, and this baffle plate and this tongue close on.

7. centrifugal cutter as claimed in claim 6 is characterized in that: this base plate is provided with at least one vent hole, and this vent hole is between this baffle plate and this tongue.

8. centrifugal cutter as claimed in claim 7 is characterized in that: this baffle plate is relative with this projection.

9. centrifugal cutter comprises that a fan frame and is contained in the interior impeller of this fan frame, and this fan frame comprises that a cover plate, a base plate and be located at the sidewall between this cover plate and this base plate, and this impeller is positioned at the space that this cover plate, base plate and this sidewall surrounds; This sidewall is provided with an exhaust outlet and one and the tongue that closes on of this exhaust outlet, and it is characterized in that: this cover plate is provided with the projection that one first intake grill and is positioned at this first wind inlet, and this base plate is provided with a vent hole that closes on this tongue.

10. centrifugal cutter as claimed in claim 9 is characterized in that: this projection is closed on this tongue.

11. centrifugal cutter as claimed in claim 10 is characterized in that: this base plate is provided with the baffle plate that one second wind inlet and is positioned at this second wind inlet, and this baffle plate is relative up and down with this projection.