Slim-type fan structure

Patent metadata

Field	Value
Publication number	US-9551348-B2
Application number	US-201414478789-A
Country	US
Kind code	B2
Filing date	Sep 5, 2014
Priority date	Nov 8, 2013
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

A slim-type fan structure includes a stator ( 1 ) and a fan blade ( 2 ). The stator includes a circuit board ( 11 ) and a plurality of layout circuits ( 12 ) disposed to circumference the circuit board ( 11 ). The stator ( 1 ) includes an axial center ( 10 ) at a center portion thereof. The fan blade ( 2 ) includes a blade wheel ( 20 ), an axial sleeve ( 21 ) at a center of the blade wheel ( 20 ) and extended axially therefrom, a plurality of blades ( 22 ) formed to circumference an outer of the blade wheel ( 20 ), and a magnetic unit ( 23 ) disposed on the blade wheel ( 20 ). Also, the axial sleeve ( 21 ) is pivotally attached to the axial center ( 10 ). Accordingly, the magnetic unit ( 23 ) is formed by a plurality of N and S pole areas ( 230 ), ( 231 ) arranged alternatively in circular rows and corresponding to the layout circuits ( 12 ) along a vertical direction for the slim design.

First claim

What is claimed is:

1. A slim-type fan structure comprising:
a stator ( 1 ) comprising a circuit board ( 11 ) and a plurality of layout circuits ( 12 ) disposed to circumference the circuit board ( 11 ); the stator ( 1 ) having an axial center ( 10 ) at a center portion thereof;
a fan blade ( 2 ) comprising a blade wheel ( 20 ), an axial sleeve ( 21 ) arranged at a center of the blade wheel ( 20 ) and extended axially therefrom, a plurality of blades ( 22 ) circumference an outer of the blade wheel ( 20 ) to form a concaved space, and a magnetic unit ( 23 ) fittedly disposed inside the concaved space on the blade wheel ( 20 ); and the axial sleeve ( 21 ) configured to pivotally attach to the axial center ( 10 ); and
a fan shield ( 3 ) covering an outer of the fan blade ( 2 ); the fan shield ( 3 ) having a fixation portion ( 300 ) provided to secure the axial center ( 10 );
wherein the magnetic unit ( 23 ) is formed by a plurality of N pole areas ( 230 ) and a plurality of S pole areas ( 231 ) arranged alternatively in circular rows and arranged corresponding to the plurality of layout circuits ( 12 ) along a vertical direction in order to achieve the slim-type fan structure,
wherein the blade wheel ( 20 ) of the fan blade ( 2 ) further includes a fixation hole ( 200 ) at a center portion thereof, and the axial sleeve ( 21 ) includes a fixation edge ( 210 ) inserted into the fixation hole ( 200 ), and the fixation edge ( 210 ) further forms a plurality of insertion members ( 211 ) circumferencing an outer thereof, and an outer surface of the fixation hole ( 200 ) further form a plurality of insertion slots ( 201 ) with dimensions corresponding to the plurality of insertion members, and
wherein when the plurality of insertion members ( 211 ) are fitted into the plurality of insertion slots, a side of each insertion member ( 211 ) away from the stator ( 1 ) is coplanar to a side of the blade wheel ( 20 ) away from the stator ( 1 ).

2. The slim-type fan structure according to claim 1 , wherein the magnetic unit ( 23 ) of the fan blade ( 2 ) is manufactured by mixing a magnetic material with a material of the fan blade ( 2 ) in order to integrally form the fan blade ( 2 ).

3. The slim-type fan structure according to claim 2 , wherein the magnetic material is a magnetic power.

4. The slim-type fan structure according to claim 3 , wherein the magnetic material is distributed throughout the blade wheel ( 20 ) opposite from the stator ( 1 ).

5. The slim-type fan structure according to claim 1 , wherein the fan shield ( 3 ) comprises a base ( 30 ) and a shield cover ( 31 ); the base ( 30 ) includes a fixation portion ( 300 ) for securing the stator ( 1 ); the base ( 30 ) includes a first air opening ( 301 ) formed on one side thereof; the shield cover ( 31 ) covers onto the base ( 30 ) and includes a second air opening ( 310 ) opposite from the fan blade ( 2 ).

6. The slim-type fan structure according to claim 5 , wherein the first and second air openings ( 301 ), ( 310 ) are an air inlet and an air outlet respectively.

Assignees

• Cooler Master Co Ltd

Inventors

• Lin Fu-Lung
• Huang Shih-Wei
• Tsai Shui-Fa

Classifications

• F04D29/281

  for fans or blowers · CPC title

• F04D17/16

  for displacing without appreciable compression · CPC title

• F04D25/0653 Primary

  the motor having a plane air gap, e.g. disc-type · CPC title