CN102996473B - Fan - Google Patents

Abstract

The invention relates to a fan, which comprises a wind scooper and an impeller. Axial two ends of the wind scooper respectively form an air inlet and an air outlet; when the impeller runs, the wind scooper generates an axial flow exhausted from the air inlet to the air outlet; the wind scooper comprises an outer frame; and the diameter of the outer frame is gradually reduced along the axial direction of the fan from one side of the impeller to one side of the air outlet. The direction of a part of air flow generated by the fan is changed by the wind scooper, and the air flow outflows along the axial direction of the fan; and the heat dissipation efficiency of the fan is increased.

Description

Fan

Technical field

The present invention relates to a kind of fan for electron element radiating.

Background technology

As the heat-generating electronic elements speed of service such as developing rapidly for electronic technology, central processing unit is more and more faster, it is transported The heat produced during row also accordingly increases, in order to these heats to be distributed the normal operation to ensure electronic component, industry Electronic component is radiated using fan.

Traditional fan generally comprises a fan frame and an impeller being contained in fan frame.The impeller includes a position The some flabellums extended in the wheel hub at center and from around the wheel hub.During fan work, the air flow method of its air outlet is unequal, In the edge of opening through the fan frame, due to the effect of torque, the air-flow of air outlet rapidly spreads air-flow toward contour stealth, leads Cause the closer to the distribution of fan peripheral air stream more to concentrate, it is fewer the closer to fan center's air flow method, the wheel hub of fan nearby because Even zone of silence can be produced without flabellum, the radiating efficiency of fan is relatively low.

The content of the invention

In view of this, it is necessary to provide a kind of radiating efficiency higher fan.

A kind of fan, including a wind scooper and an impeller, the axial two ends of the wind scooper form respectively an air intake vent And an air outlet, generation arranges axial flow to air outlet, the wind scooper bag from air intake vent when impeller run in the wind scooper Include a housing, diameter being axially gradually reduced from the lateral air outlet side near impeller along fan of the housing.

A part of air-flow that said fans are produced changes direction under the guiding of wind scooper, and the axial direction along fan is flowed out, Improve the radiating efficiency of fan.

Description of the drawings

Fig. 1 is the assembling schematic diagram of fan one embodiment of the present invention.

Fig. 2 is the exploded view of the fan in Fig. 1.

Fig. 3 is sectional view of the fan in Fig. 1 along IV-IV lines.

Fig. 4 is the schematic diagram at the fan back side in Fig. 1.

Main element symbol description

Fan	100
		Support base	10
Wind scooper	20
		Impeller	30
Body	22
		Lid	24
Housing	220
		Pedestal	222
Stator blade	224
		Air outlet	226
Connecting portion	240
		Bonnet	242
Driving rod	246
		Pore	244
Flat board	12
		Riser	14
Pivoted hole	140
		Wheel hub	32
Flabellum	34
		Rotating shaft	36

Following specific embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.

Specific embodiment

Fig. 1 is referred to, the fan 100 of one embodiment of the present of invention includes that a support base 10 and the support base 10 connect The wind scooper 20 for connecing and an impeller 30 being placed in the wind scooper 20.

Please refer to Fig. 2 and Fig. 3, the wind scooper 20 includes a body 22 and a lid being connected with the body 22 24.The body 22 include housing 220, positioned at the center of housing 220 a column pedestal 222 and from the pedestal 222 Some helical form stator blades 224 that periphery extends and is connected with the housing 220.The opening in the outside of housing 220 constitutes wind scooper 20 Air outlet 226.The housing 220 is equal to pedestal 222 along central shaft along the length that the central axis AA ' of fan 100 extends The length that line AA ' extends.

The internal diameter and external diameter of the housing 220 along the central axis AA ' of fan 100 direction, near impeller 30 one It is laterally away from the side of impeller 30（I.e. near the side of air outlet 226）It is gradually reduced, forms a knot tapered from inside to outside Structure, makes the air-flow near the housing 220 produced by fan 100 be basically parallel to central shaft certainly under the guiding of the inwall of housing 220 The direction of line AA ' is changed to the direction of the central axis AA ' towards fan 100 and flows out, that is to say, that in the inwall of housing 220 Effect under air-flow be changed after flow direction and central axis AA ' between have angle.

In the present embodiment, the pedestal 222 is divided into two parts along the direction of central axis AA ', and the pedestal 222 is close The diameter of the part of air outlet 226 along central axis AA ' direction, from closer to impeller 30 the side of a lateral air outlet 226 It is gradually reduced, makes a part change direction under the guiding of pedestal 222 with towards fan along the air-flow of the Surface runoff of pedestal 222 Flow out in the direction of 100 central axis AA '.The pedestal 222 near the part of impeller 30 diameter along central axis AA ' side To, gradually increase from the side for being laterally away from impeller 30 near impeller 30, it is beneficial to air-flow along the surface direction of pedestal 222 Flow the side of air outlet 226.

Preferably, the pedestal 222 near the part of air outlet 226 diameter from closer to impeller 30 a lateral air-out 226 sides of mouth are gradually reduced.Certainly, diameter of the pedestal 222 near the part of impeller 30 is laterally away from near impeller 30 The trend of the side change of impeller 30 can also be gradually reduced or keep constant.

Please refer to Fig. 4, the lid 24 is included after the connecting portion 240 of a cylindrical shape and one relative with impeller 30 Lid 242.The impeller 30 be placed in the wind scooper 20 to should connecting portion 240 position.The diameter of the connecting portion 240 is along in The direction of heart axis AA ', the side for being laterally away from bonnet 242 near bonnet 242 keeps constant.The connecting portion 240 Outer surface opposite sides convex stretches out two driving rods 246.The inner and outer surfaces of the bonnet 242 substantially hemisphere face.The bonnet 242 open up some pores 244 in concentric circular arrangement, constitute the air intake vent of wind scooper 20.

The support base 10 includes the flat board 12 of a rectangle and directly erects for upwardly extending two from the two ends marginal lappet of flat board 12 Plate 14.Each riser 14 opens up the pivoted hole 140 of a circle.Two driving rods 246 of the wind scooper 20 are placed in the support The pivoted hole 140 of seat 10, makes wind scooper 20 with the pivotal fit of support base 10 and can rotate relative to support base 10.

The impeller 30 is including a wheel hub 32, some flabellums 34 extended from the periphery of wheel hub 32 and is fixed on the wheel hub 32 One rotating shaft 36 in central authorities.The pedestal 222 that the rotating shaft 36 is removably secured to the wind scooper 20 is central.

When fan 100 works, the high speed of impeller 30 is rotated through the pore 244 of the wind scooper 20 from extraneous suction airflow, gas Stream flowing in wind scooper 20.Due to the housing 220 along the direction of the central axis AA ' of fan 100 tapered from inside to outside, edge The air-flow of the inwall of housing 220 flowing under the guiding of the inwall of housing 220, changes central axis AA ' of the direction towards fan 100 Direction flow out.Along wind scooper 20 stator blade 224 flow a part of air-flow under the guiding of stator blade 224 towards central axis Flow out in the direction of AA '.A part for the air-flow that fan 100 flows out is concentrated in the outer side center axis of 100 air outlet of fan 226 Near AA ', air-flow is more uniform to central distribution from the periphery of fan 100, improves the radiating efficiency of fan 100.

Due to the pedestal 222 near the part of air outlet 226 diameter from closer to impeller 30 a lateral air outlet 226 Side is gradually reduced a part along the air-flow of the Surface runoff of pedestal 222 under the guiding of pedestal 222, and change direction is towards fan Flow out in the direction of 100 central axis AA '.Thus, further the fraction that fan 100 flows out can be concentrated on into fan 100 Near the outer side center axis AA ' of air outlet 226, further to improve the uniformity of air-flow and the radiating efficiency of fan 100.

Claims (6)

1. a kind of fan, an including wind scooper and an impeller, the axial two ends of the wind scooper formed respectively an air intake vent and The axial flow to air outlet is arranged in one air outlet, interior generation when impeller runs of the wind scooper from air intake vent, and the wind scooper includes One housing near the air outlet, it is characterised in that：The diameter of the housing is along the axial from the one of close impeller of fan Lateral air outlet side is gradually reduced, the wind scooper also include located at a pedestal at housing center and from the pedestal periphery extending and It is connected some stator blades with the housing, side of the pedestal away from the air outlet is fixed in the impeller rotation, near air outlet The diameter of a part for the pedestal is gradually reduced closer to lateral air outlet side of the impeller certainly along the axial direction of fan, Diameter near a part for the pedestal of the impeller is axially laterally away from the impeller along fan near the impeller Side gradually increase.

2. fan as claimed in claim 1, it is characterised in that：The wind scooper also includes a lid being connected with body Body, the impeller is placed in the wind scooper.

3. fan as claimed in claim 2, it is characterised in that：The lid include the connecting portion of cylindrical shape and with impeller phase To a bonnet, the impeller be placed in the wind scooper to should connecting portion position, the bonnet opens up some in concentric circular The pore of arrangement, constitutes the air intake vent of wind scooper.

4. fan as claimed in claim 3, it is characterised in that：The inner and outer surfaces of the bonnet are hemisphere face.

5. fan as claimed in claim 3, it is characterised in that：, along fan axial direction, oneself is near bonnet for the diameter of the connecting portion One be laterally away from bonnet side keep it is constant.

6. fan as claimed in claim 1, it is characterised in that：Also include a support base with wind scooper pivot joint.