CN102108980A

CN102108980A - Centrifugal fan

Info

Publication number: CN102108980A
Application number: CN2009103121204A
Authority: CN
Inventors: 查新祥; 余业飞; 郭哲豪
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: 2009-12-23
Filing date: 2009-12-23
Publication date: 2011-06-29
Also published as: US20110150651A1

Abstract

The invention relates to a centrifugal fan which comprises a fan frame, wherein the fan frame comprises a convergence part, a first frame body and a second frame body which are connected with the convergence part; the first frame body and the second frame body are respectively arranged at two sides of one end of the convergence part; the other end of the convergence part forms an air outlet; a first containing space is formed in the first frame body; a second containing space is formed in the second frame body; a first fan wheel is arranged in the first containing space; a second fan wheel is arranged in the second containing space; the first frame body is provided with a first notch communicated with the convergence part; the second frame body is provided with a second notch communicated with the convergence part; and the air flow generated by the first fan wheel and the air flow generated by the second fan wheel are converged by the convergence part, and exhausted to the outer side of the centrifugal fan through the air outlet.

Description

Centrifugal cutter

Technical field

The present invention relates to a kind of centrifugal cutter, be meant a kind of centrifugal cutter that heat-generating electronic elements is dispelled the heat of being used for especially.

Background technique

Along with developing rapidly of electronics and information industry, heat-generating electronic elements in the electronic equipment, as the CPU in the computer etc. towards high-speedization, multifunction and miniaturization development, thereby cause the heating value of these heat-generating electronic elements and heat density increasing, if untimelyly effectively the heat of these heat-generating electronic elements is left, the service behaviour of these heat-generating electronic elements will greatly be influenced, also can shorten their working life simultaneously, therefore, must the heat-generating electronic elements in the electronic equipment be dispelled the heat.

At present, industry adopts centrifugal cutter that electronic equipment is dispelled the heat such as the heat-generating electronic elements in the notebook computer usually.This centrifugal cutter comprises a fan frame and is contained in an impeller of fanning in the frame.Offer a wind inlet and an exhaust outlet vertical on this fan frame with this wind inlet, wherein, this wind inlet is over against this impeller, and this exhaust outlet is arranged on the side direction of fan frame, the air-flow of this centrifugal cutter outside is in this wind inlet enters this fan frame, and the exhaust outlet from this fan frame blows out after this impeller quickens.The air output of this centrifugal cutter and blast directly influence its radiating efficiency, and the air output of centrifugal cutter and blast are big more, and its radiating efficiency is high more, usually, the rotating speed of centrifugal cutter is high more, and its air output and blast are big more, yet high rotating speed also will cause the noise of centrifugal cutter to increase.

Summary of the invention

In view of this, be necessary to provide a kind of and have big air output and blast and than the centrifugal cutter of low noise.

A kind of centrifugal cutter, comprise a fan frame, this fan frame comprises the portion of confluxing and first framework and second framework that link to each other with this portion of confluxing, this first framework and second framework are divided into the both sides of an end of this portion of confluxing, the other end of this portion of confluxing forms an exhaust outlet, form one first containing space in this first framework, form one second containing space in this second framework, one first impeller is set in this first containing space, one second impeller is set in this second containing space, offer one first breach that communicates with the portion of confluxing on this first framework, offer one second breach that communicates with the portion of confluxing on this second framework, this portion of confluxing converges the air-flow of first impeller generation and the air-flow of second impeller generation, and through the outside of exhaust outlet row to this centrifugal cutter.

Above-mentioned centrifugal cutter drives air-flow by two impellers, and by the portion of confluxing air-flow is carried out supercharging and mixing, and under the situation that is lifted out air quantity and blast, this centrifugal cutter can adopt less rotating speed, thereby effectively reduces the Rotation Noise of centrifugal cutter.

Description of drawings

Figure 1 shows that the three-dimensional assembly diagram of the centrifugal cutter in the first embodiment of the invention.

Figure 2 shows that the three-dimensional exploded view of the centrifugal cutter among Fig. 1.

Figure 3 shows that the three-dimensional assembly diagram of the centrifugal cutter in the second embodiment of the invention.

Figure 4 shows that the cut-away view after centrifugal cutter among Fig. 3 removes cover plate.

The primary component symbol description

Centrifugal cutter	100、100a
		The fan frame	10
First impeller	20
		Second impeller	30
The portion of confluxing	40
		Exhaust outlet	41
Base plate	42
		Top board	43
Guide plate	44、44a
		First framework	50、50a
First containing space	51、 51a
		First breach	52、52a
Second framework	60、60a
		Second containing space	61
Second breach	62
		Base plate	71
Top board	72
		Side plate	73
Wind inlet	74

Embodiment

The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Figure 1 and Figure 2 is the centrifugal cutter 100 in a preferred embodiment of the present invention, and this centrifugal cutter 100 comprises that the fan frame 10 of a hollow reaches one first impeller 20 and one second impeller 30 that is articulated in side by side in this fan frame 10.

This fan frame 10 comprises first framework 50 and second framework 60 of confluxing portion 40 and linking to each other with this portion 40 of confluxing, this first framework 50 and second framework 60 are divided into the both sides of an end (being the top in the present embodiment) of this portion 40 of confluxing symmetrically, and the other end of this portion 40 of confluxing (being the bottom in the present embodiment) forms an exhaust outlet 41.

This portion 40 of confluxing comprises a base plate 42, a top board 43 and two guide plates 44, this two guide plate 44 the both sides of this base plate 42 and be connected in base plate 42 and top board 43 between.

Form one first containing space 51 in this first framework 50, form one second containing space 61 in this second framework 60, described first impeller 20 is set in this first containing space 51, described second impeller 30 is set in this second containing space 61.

Offer one first breach 52 that communicates with the portion of confluxing 40 on this first framework 50, offer one second breach 62 that communicates with the portion of confluxing 40 on this second framework 60, this portion 40 of confluxing converges the air-flow of first impeller, 20 generations and the air-flow of second impeller, 30 generations, and through the outside of exhaust outlet 41 rows to this centrifugal cutter 100.The area of this exhaust outlet 41 is less than the summation of this first breach 52 with the area of this second breach 62.

This first framework 50 include a base plate 71, a top board 72 with second framework 60 and be connected base plate 71 and top board 72 between the side plate 73 of a volute, this side plate 73 extends upward from the edge-perpendicular of base plate 71, this first breach 52 is opened on the side plate 73 of first framework 50, this second breach 62 is opened on the side plate 73 of second framework 60, all offer a wind inlet 74 on the top board 72 of this first framework 50 and on the top board 72 of this second framework 60, this two wind inlet 74 is respectively over against this first impeller 20 and this second impeller 30.

One end of the side plate 73 of this first framework 50 links to each other with an end of the side plate 73 of this second framework 60, thereby forms a separating part 75, and this separating part 75 is between this first impeller 20 and second impeller 30, and this separating part 75 is over against the middle part of this portion 40 of confluxing.The other end of the other end of the side plate 73 of this first framework 50 and the side plate 73 of this second framework 60 mutually over against and be connected with two guide plates 44 of this portion 40 of confluxing respectively.

This vertical cross-section that confluxes portion 40 roughly is " mouth " font, and two guide plates 44 of this portion 40 of confluxing are parallel to each other, the top of this two guide plate 44 respectively with the side plate 73 of this

first framework

50 and 73 vertical connections of side plate of second framework 60.

When these centrifugal cutter 100 runnings, the sense of rotation of this first impeller 20 is opposite with the sense of rotation of this second impeller 30, and in the present embodiment, first impeller 20 turns clockwise, and this second impeller 30 is rotated counterclockwise (being as the criterion with the visual angle among Fig. 2).The air-flow of these centrifugal cutter 100 outsides is in this two wind inlet 74 enters this first containing space 51 and second containing space 61 respectively, the air-flow that enters in this first containing space 51 flows in this portion 40 of confluxing from this first breach 52 after this first impeller 20 quickens, enter air-flows in this second containing space 61 and quicken the back through this second impeller 30 and also flow in this portion 40 of confluxing from this second breach 62, certainly this first breach 52 enter in this portion 40 of confluxing air-flow with enter air-flow in this portion 40 of confluxing from this second breach 62 and confluxing and carry out pressure superposition and mix the outside that afterwards blows to this centrifugal cutter 100 in the portion 40 from this exhaust outlet 41.

Centrifugal cutter 100 in the foregoing description is by two impellers, promptly first impeller 20 and second impeller 30 drive air-flow, and carry out supercharging and mixing by 40 pairs of air-flows of the portion of confluxing, compare with the centrifugal cutter of impeller with a same size, under the situation that is lifted out air quantity and blast, centrifugal cutter 100 in the foregoing description also can adopt less rotating speed, thereby effectively reduces the Rotation Noise of centrifugal cutter 100.

Fig. 3 and Figure 4 shows that centrifugal cutter 100a in the second embodiment of the invention, the structure of the centrifugal cutter 100 among itself and first embodiment is basic identical, difference is, the first framework 50a of centrifugal cutter 100a in the present embodiment and the second framework 60a asymmetricly are distributed in the both sides on the top of the portion of confluxing 40, wherein, the first framework 50a is with respect to the exhaust outlet 41 of more close this portion 40 of confluxing of the second framework 60a, this first impeller 20 is also with respect to the exhaust outlet 41 of these second impeller, 30 more close these portions 40 of confluxing, the length of the guide plate 44 that the length of the guide plate 44a that this portion 40 of confluxing is connected with the side plate 73 of this first framework 50a is connected with the side plate 73 of this second framework 60a less than this portion 40 of confluxing.So, this first impeller 20 is different with the air-out angle of second impeller 30, help reducing the noise that produces because of air-flow resonance, and the air-flow of second breach, 62 outflows of this second framework 60a can quicken the air-flow of the first breach 52a outflow of this first framework 50a certainly certainly, thereby helps improving the blast of this centrifugal cutter 100a.

Claims

1. centrifugal cutter, comprise a fan frame, it is characterized in that: this fan frame comprises the portion of confluxing and first framework and second framework that link to each other with this portion of confluxing, this first framework and second framework are divided into the both sides of an end of this portion of confluxing, the other end of this portion of confluxing forms an exhaust outlet, form one first containing space in this first framework, form one second containing space in this second framework, one first impeller is set in this first containing space, one second impeller is set in this second containing space, offer one first breach that communicates with the portion of confluxing on this first framework, offer one second breach that communicates with the portion of confluxing on this second framework, this portion of confluxing converges the air-flow of first impeller generation and the air-flow of second impeller generation, and through the outside of exhaust outlet row to this centrifugal cutter.

2. centrifugal cutter as claimed in claim 1 is characterized in that: this portion of confluxing comprises a base plate, a top board and two guide plates, this two guide plate the both sides of base plate and be connected in base plate and top board between.

3. centrifugal cutter as claimed in claim 2 is characterized in that: this two guide plate is parallel to each other, and the cross section of this portion of confluxing is " mouth " font.

4. centrifugal cutter as claimed in claim 2, it is characterized in that: this first framework comprise a base plate, a top board with each framework in second framework and be connected base plate and top board between the side plate of a volute, this first breach is opened on the side plate of first framework, this second breach is opened on the side plate of second framework, all offers a wind inlet on the top board of this first framework and on the top board of this second framework.

5. centrifugal cutter as claimed in claim 4, it is characterized in that: an end of the side plate of this first framework links to each other with an end of the side plate of this second framework and forms a separating part, this separating part between first impeller and second impeller, the other end of the side plate of the other end of the side plate of this first framework and this second framework mutually over against and be connected with this two guide plate respectively.

6. centrifugal cutter as claimed in claim 5 is characterized in that: this separating part is over against the middle part of this portion of confluxing.

7. centrifugal cutter as claimed in claim 1 is characterized in that: this first framework and this second framework are symmetrically distributed in the both sides of this portion of confluxing.

8. centrifugal cutter as claimed in claim 1 is characterized in that: this first framework and this second framework distribution or asymmetrical distribution are in the both sides of this portion of confluxing, and this first framework is with respect to the exhaust outlet of more close this portion of confluxing of second framework.

9. centrifugal cutter as claimed in claim 1 is characterized in that: the area of this exhaust outlet is less than the summation of the area of this first breach and this second breach.

10. centrifugal cutter as claimed in claim 1 is characterized in that: described first impeller is opposite with the sense of rotation of second impeller.