HEAT SINK

• US 20120305224A1
• Filed: 12/02/2009
• Published: 12/06/2012
• Est. Priority Date: 12/02/2009
• Status: Abandoned Application

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Kim, Sung Jin, Kim, Juwan, Kim, Dong-Kwon
• Application Number:
  US13/513,507
• Publication Number:
  US 20120305224A1
• Time in Patent Office: Days
• US Class Current: 165/104.34
• CPC Class Codes: F04D 17/127 with radially spaced stages, e.g. for contrarotating type
• CPC Class Codes: F04D 17/16 for displacing without appreciable compression
• CPC Class Codes: F04D 29/281 for fans or blowers
• CPC Class Codes: F04D 29/30 Vanes
• CPC Class Codes: F04D 29/582 specially adapted for elastic fluid pumps
• CPC Class Codes: F28F 3/02 Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations F28F3/08 takes precedence
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

A heat sink provided. In the heat sink in accordance with an embodiment of the present invention, a heat dissipation plate forms a channel between each of stages by isolating a plurality of heat dissipating fins in equal intervals and arranging the heat dissipating fins in a multi-stage circle shape. Then, the heat sink forms a path between the sequentially isolated heat dissipating fins at each of the stages. Also, a centrifugal fan alternatively blocks the channel and path at each of the stages through a rotation by a plurality of blades arranged in a multi-stage circle shape to be positioned between the channels. Then, the centrifugal fan is capable of inflowing outer air to discharge the air by generating a pressure difference of inter/outer air through a combination of the blade and the heat dissipation plate.

Claims

1. A heat sink comprising:

a heat dissipation plate forming a channel between each of stages by isolating a plurality of heat dissipating fins in equal intervals and arranging the heat dissipating fins in a multi-stage circle shape, forming a path between the sequentially isolated heat dissipating fins at each of the stages; and

a centrifugal fan alternatively blocking the channel and path at each of the stages through a rotation by a plurality of blades arranged in a multi-stage circle shape to be positioned between the channels, inflowing outer air to discharge the air by generating a pressure difference of inter/outer air through a combination of the blade and the heat dissipation plate.

2. The heat sink of claim 1, wherein the heat dissipation plate includes a second flange in which the heat dissipation fins are mounted vertically upward with respect to the second flange, and a motor is set vertically upward on an upper surface of the second flange.

3. The heat sink of claim 2, wherein the centrifugal fan prepares a first flange in which the blades are mounted vertically downward with respect to the blade to form an inflow hole and is rendered to be rotated by fixing a rotary shaft of the motor by a connection hole of a combination block after positioning the combination block supported by a rib at a center of the inflow hole.

4. The heat sink of claim 1, wherein the path is a space between the sequentially isolated heat dissipation fins at equal intervals and has a virtual arc shape which is radiated outwardly from a center of the second flange under the condition that the heat dissipation fins are arranged in a multi-stage concentric circle shape.

5. The heat sink of claim 1, wherein the blades are arranged to be crossed between the channels and paths of each of stages in the heat dissipation plate.

6. The heat sink of claim 1, wherein the heat dissipation fins and blades have an incline line on one side thereof, and the incline lines has an angle inside from outside thereof toward a rotational direction of the heat dissipation plate.