CN101338767B

CN101338767B - Fan leaf structure and centrifugal fan adopting the fan leaf structure

Info

Publication number: CN101338767B
Application number: CN2007100758349A
Authority: CN
Inventors: 官志彬
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: 2007-07-06
Filing date: 2007-07-06
Publication date: 2010-12-01
Anticipated expiration: 2027-07-06
Also published as: CN101338767A

Abstract

The present invention relates to a centrifugal fan, which comprises a blade structure. The blade structure comprises a hub and a plurality of first blades radially arranged on the circumference of the hub; wherein, the blade structure also comprises a plurality of second blades radially arranged on the surface of the hub; each second blade is provided with a windward side; the top of the second blade is bent into an ala; between the ala and the surface of the hub, a flow-guiding groove is formed on the windward side of the second blade. In the blade structure of the centrifugal fan of the present invention, a plurality of second blades are arranged on the top of the hub, and the flow-guiding grooves formed on the windward sides of the second blades can guide air flow to rapidly flow to the first blades, so that the wind volume of the centrifugal fan can be increased.

Description

Blade structure and adopt the centrifugal cutter of this blade structure

Technical field

The present invention relates to a kind of centrifugal cutter, particularly about a kind of blade structure of centrifugal cutter and adopt the centrifugal cutter of this blade structure.

Background technique

Along with developing rapidly of computer industry, CPU pursues high-speedization, and the heat dissipation problem that multifunction and miniaturization are derived is more and more serious, and this is more outstanding in the narrow and small electronic equipment in inner spaces such as notebook computer.If the heats that electronic component produced such as CPU in the notebook computer can't be distributed timely and effectively, will greatly influence the service behaviour of electronic component, also can reduce the working life of electronic component simultaneously, therefore must dispel the heat to electronic component.

In notebook computer, the normal heat radiation module of being made up of thermal conductor, heat pipe, radiating fin and centrifugal cutter that adopts is to electronic element radiating at present.Thermal conductor is attached on the electronic component, and thermal conductor is connected by heat pipe with radiating fin, and the air-flow that centrifugal cutter produces brushes radiating fin and distributes with heat the most at last with radiating fin generation heat exchange.Therefore, centrifugal cutter plays a part very important in the heat radiation module.The air quantity of centrifugal cutter is big more, and then the heat with radiating fin exchange is also just more, thereby effectively the heat of electronic component is distributed.Along with the raising of CPU handling property, the heat that it produced also just constantly increases, for effectively heat being distributed to guarantee that CPU moves, and can produce bigger air quantity when just needing centrifugal cutter work under normal temperature.Therefore, industry always desired design go out a kind of blade structure that can produce the centrifugal cutter of big air quantity.

Summary of the invention

In view of this, be necessary to provide a kind of centrifugal cutter that can produce the blade structure of big air quantity and adopt this blade structure.

A kind of blade structure, comprise a wheel hub and radially distribute in circumferential some first blades of wheel hub, wherein this blade structure also comprises lip-deep some second blades that radially distribute in this wheel hub, this second blade has a windward side, the top bending of this second blade forms a fin, the upper bound, windward side in second blade between the surface of this fin and wheel hub is shaped as a guiding gutter, the middle position on the top of this wheel hub is provided with a round platform that protrudes, this round platform comprises an end face and a conical surface, each second blade comprises a straight part and a curved portions, and this straight part and curved portions are positioned at respectively on the conical surface and end face of this round platform.

A kind of centrifugal cutter, comprise a blade structure, this blade structure comprises a wheel hub and radially distributes in circumferential some first blades of wheel hub, wherein this blade structure also comprises lip-deep some second blades that radially distribute in this wheel hub, this second blade has a windward side, the top bending of this second blade forms a fin, the upper bound, windward side in second blade between the surface of this fin and wheel hub is shaped as a guiding gutter, the middle position on the top of this wheel hub is provided with a round platform that protrudes, this round platform comprises an end face and a conical surface, each second blade comprises a straight part and a curved portions, and this straight part and curved portions are positioned at respectively on the conical surface and end face of this round platform.

Compared with prior art, in the blade structure of above-mentioned centrifugal cutter, the top of wheel hub is provided with some second blades, and formed guiding gutter can promptly flow to first blade by air-guiding on the windward side of this second blade, thereby the air quantity of centrifugal cutter is increased.

Description of drawings

With reference to the accompanying drawings, in conjunction with the embodiments the present invention is further described.

Fig. 1 is the blade structure stereogram of a preferred embodiment wherein of centrifugal cutter of the present invention.

Fig. 2 is the enlarged view at II place among Fig. 1.

Fig. 3 is the plan view of the blade structure of centrifugal cutter shown in Figure 1.

Embodiment

The blade structure 10 that Figure 1 shows that centrifugal cutter of the present invention is the stereogram of a preferred embodiment wherein, and this blade structure 10 comprises a wheel hub 11, be located on several first blades 12 of wheel hub 11 peripheries and be positioned at several second blades 13 on wheel hub 11 tops.

Wheel hub 11 has an outer circumferential face 111 and an end face 112, and these first blades 12 are the radial outer circumferential face 111 that is uniformly distributed in wheel hub 11.First blade 12 is the sheet platy structure, the inner 121 of each first blade 12 is connected with the outer circumferential face 111 and the end face 112 of wheel hub 11 simultaneously, promptly first blade 12 protrudes from the end face 112 of wheel hub 11 at inner 121 places, can increase the join strength between first blade 12 and the wheel hub 11 like this, air-flow that second blade 13 produced is flow between the two first adjacent blades 12 in the formed first passage 122 along the direction parallel with the end face 112 of wheel hub 11.

Please be simultaneously with reference to Fig. 2, the convex round platform 14 that stretches out of the middle position on the top of wheel hub 11, for making processing convenient, also form the cylindrical body 15 of a tool between the end face 112 of this round platform 14 and wheel hub 11 than low height, these second blades 13 are on the radial surface that is evenly distributed on round platform 14.This round platform 14 has a conical surface 141 and an end face 142, and each second blade 13 comprises a straight part 131 and a curved portions 132, and this straight part 131 and this curved portions 132 lay respectively at the conical surface 141 and end face 142 of round platform 14.Be formed with a second channel 16 between the two second adjacent blades 13, the air that enters from the top of wheel hub 11 can flow to first blade 12 apace along this second channel 16.The end of the curved portions 132 of second blade 13 does not extend to the center of round platform 14, thereby forms a cylindrical space 17 between the end of the curved portions 132 of these second blades 13.This curved portions 132 has the effect of water conservancy diversion, its thickness successively decreases with the distance between the curved portions 132 that increases adjacent two second blades 13 along the radially inner direction of wheel hub 11, promptly imports in the second channel 16 between adjacent two second blades 13 thereby the top from wheel hub 11 can be entered into air in the cylindrical space 17.

Second blade 13 has a windward side 133 and a lee face 134, and in the process of blade structure 10 runnings, the windward side 133 of second blade 13 is positioned at the place ahead of this lee face 134 on the sense of rotation of blade structure 10.The bottom of the straight part 131 of this second blade 13 embeds and is fixed on the conical surface 141 of round platform 14, and is perhaps one-body molded with the conical surface 141 of round platform 14.The top of the straight part 131 of this second blade 13 then bending extends to form a fin 138, thereby form a guiding gutter 137 defining jointly between the conical surface 141 by fin 138 and round platform 14 on the windward side 133 of this second blade 13, air-flow in the second channel 16 between adjacent two second blades 13 is under the qualification of fin 138, can promptly flow to first blade 12 along guiding gutter 137, thereby the flow of the first passage 122 interior air-flows between adjacent two first blades 12 is increased.In the present embodiment, for ease of making, the bottom of the straight part 131 of this second blade 13 also bending extends to form fin 138, is " the symplex structure up and down of [" shape thereby make straight part 131 form the cross section.

As shown in Figure 3, the quantity of first blade 12 is the twice of the quantity of second blade 13, the outer end 136 of each second blade 13 is relative with the inner 121 of one first blade 12, and air-flows in the second channel 16 between the two second adjacent blades 13 are flow in the first passage 122 between the two first adjacent blades 12 more swimmingly.

This blade structure 10 can be located at the fan frame of a centrifugal cutter, and during work, this blade structure 10 rotates in the counterclockwise direction, is located at air that second blade 13 on wheel hub 11 tops will enter from wheel hub 11 tops, first blade 12 that leads apace.

In the blade structure 10 of above-mentioned centrifugal cutter, middle position on the top of wheel hub 11 is provided with a round platform 14, the conical surface 141 of this round platform 14 and end face 142 are provided with some second blades 13 that radially distribute, these second blades 13 can be accelerated the flowing of air of wheel hub 11 tops, the air-flow that is produced by second blade 13 flow into first passage 122 between adjacent two first blades 12 along second channel 16, thereby the air quantity that centrifugal cutter is produced in the unit time is increased.Form a guiding gutter 137 with guide functions on the windward side 133 of second blade 13, thereby make the air-flow in the second channel 16 between the two second adjacent blades 13 promptly flow to first blade 12, the flow velocity of air-flow in the second channel 16 is accelerated along this guiding gutter 137.In addition, it is that the thickness of a curved portions 132 and this curved portions 132 successively decreases along the radially inner direction of wheel hub 11 that second blade 13 is positioned at part on the end face 142 of round platform 14, and the curved portions 132 of these second blades 13 can promptly import in the second channel 16 between the two second adjacent blades 13 enter into air in the cylindrical space 17 from wheel hub 11 tops.

In the blade structure 10 of above-mentioned centrifugal cutter, the top of the wheel hub 11 of blade structure 10 is provided with second blade 13, make full use of by the space to the top of wheel hub 11, thereby the air quantity that centrifugal cutter is produced increases.In this blade structure 10, second blade 13 is arranged on the conical surface 141 and end face 142 of round platform 14, be appreciated that ground, this round platform 14 also can be the stage body of other shapes such as terrace with edge, the bus of this stage body can be straight line or camber line, transition forms a curved surface between the end face 112 of the end face of this stage body and wheel hub 11, and these second blades 13 are distributed on this curved surface radially.

Claims

1. blade structure, comprise a wheel hub and radially distribute in circumferential some first blades of wheel hub, it is characterized in that: this blade structure also comprises lip-deep some second blades that radially distribute in this wheel hub, this second blade has a windward side, the top bending of this second blade forms a fin, the upper bound, windward side in second blade between the surface of this fin and wheel hub is shaped as a guiding gutter, the middle position on the top of this wheel hub is provided with a round platform that protrudes, this round platform comprises an end face and a conical surface, each second blade comprises a straight part and a curved portions, and this straight part and curved portions are positioned at respectively on the conical surface and end face of this round platform.

2. blade structure as claimed in claim 1 is characterized in that: a fin is formed on the bottom of this second blade also bending, thereby the cross section of this second blade is " [" shape.

3. blade structure as claimed in claim 1 is characterized in that: the thickness of this curved portions radially successively decreases towards the center of wheel hub along wheel hub.

4. blade structure as claimed in claim 1 is characterized in that: the end of the curved portions of described some second blades surrounds a cylindrical space jointly.

5. blade structure as claimed in claim 1 is characterized in that: the inner of this first blade is connected with the outer circumferential face of wheel hub and the end face of wheel hub simultaneously.

6. blade structure as claimed in claim 5 is characterized in that: the outer end of each second blade is inner relative with one first blade.

7. blade structure as claimed in claim 6 is characterized in that: the quantity of described first blade is the twice of the quantity of second blade.

8. a centrifugal cutter comprises a blade structure, it is characterized in that: this blade structure is the blade structure described in any one of the claim 1 to 7.