Fan
Technical field
The present invention relates to a kind of fan.
Background technique
Please refer to Fig. 1, existing fan 80 generally includes a fan frame 81 and and is contained in the impeller 83 fanned in frame 81.The middle part of fan frame 81 is the receiving hole 85 of the inner wall smooth in order to accommodate impeller 83 of a circular in cross-section.Impeller 83 rotates, and acts on divergently being blown out to surrounding by the opposite side of receiving hole 85 after air-flow enters receiving hole 85 from the side of receiving hole 85 through impeller 83.For needing the element of distinguished and admirable concentrated heat radiation, the radiating effect of this fan 80 is also bad.
Summary of the invention
In view of more than, be necessary to provide a kind of fan making distinguished and admirable more concentrated blowout.
A kind of fan, comprise a fan frame and an impeller, the middle part of this fan frame is provided with a receiving hole, and this impeller is installed in this receiving hole, and this fan frame is formed around the groove of an annular of this receiving hole and an adjacent recess and the flange of the annular of this groove projection relatively on the hole wall of this receiving hole.
A kind of fan, comprise a fan frame and an impeller, the middle part of this fan frame is provided with a receiving hole, this impeller is installed in this receiving hole, this fan frame forms the groove of some annulars around this receiving hole on the hole wall of this receiving hole, and the both sides of each groove form the flange of the annular of a confronting grooves projection respectively.
The groove of this fan and flange flow through receiving hole air-flow to driving through vane rotary pressurizes, concentrate to middle part while air-flow is blown out outside receiving hole, thus the distinguished and admirable air quantity that fan is blown out is larger, blast is stronger, can blow to farther place, radiating effect is better.
Accompanying drawing explanation
Fig. 1 is that existing fan is in the floor map of working state.
Fig. 2 is the stereogram of the better embodiment of fan of the present invention.
Fig. 3 is that the fan in Fig. 2 is in the floor map of working state.
Primary component symbol description
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Please refer to Fig. 2 and Fig. 3, the better embodiment of fan 10 of the present invention, comprise fan frame 12 and an impeller 14.
This fan frame 12 comprises relative two side 121.The middle part of this fan frame 12 is provided with the receiving hole 123 running through this two side 121 of a cross section ovalize.This impeller 14 is installed in this receiving hole 123.This fan frame 12 forms the groove 125 of some annulars around this receiving hole 123 on the hole wall 124 of this receiving hole 123, and the both sides of each groove 125 form the flange 126 of the annular of confronting grooves 125 projection respectively.
When fan 10 works, impeller 14 is blown out by the opposite side of receiving hole 123 after rotating and making the distinguished and admirable side by receiving hole 123 enter receiving hole 123.Owing to the hole wall 124 of receiving hole 123 being formed groove separately 125 and flange 126, groove 125 and flange 126 flow through receiving hole 123 air-flow to rotarily driving through impeller 14 is formed and pressurizes, concentrate to middle part while air-flow is blown out outside receiving hole 123, thus the distinguished and admirable air quantity making fan 10 blow out is larger, blast is stronger, can blow to farther place, radiating effect is better.
The cross section ovalize of the receiving hole 123 of this fan 10, can improve wind and cut sound, reduces noise when fan 10 works.
In the present embodiment, groove 125 and the cross section of flange 126 are all in circular arc.In other embodiments, groove 125 can also be arc or other shape with the cross section of flange 126, and groove 125 and flange 126 jointly form corrugated surface on the hole wall 124 of receiving hole 123.
In other embodiments, the hole wall 124 of the receiving hole 123 of this fan 10 only can be provided with the flange 126 of a groove 125 and an adjacent recess 125, can realize equally to the effect of distinguished and admirable pressurization, concentrate to middle part while air-flow is blown out outside receiving hole 123.