US20120305224A1 - Heat sink - Google Patents
Heat sink Download PDFInfo
- Publication number
- US20120305224A1 US20120305224A1 US13/513,507 US200913513507A US2012305224A1 US 20120305224 A1 US20120305224 A1 US 20120305224A1 US 200913513507 A US200913513507 A US 200913513507A US 2012305224 A1 US2012305224 A1 US 2012305224A1
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- United States
- Prior art keywords
- heat
- heat dissipation
- heat sink
- stages
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
- F04D17/127—Multi-stage pumps with radially spaced stages, e.g. for contrarotating type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- cooling means To stably secure functions of electronic components, cooling means have been adopted.
- heat generated from heating elements such as CPUs is conducted through the terminal base to the heat pipes, and then moved to the heat radiating blocks that are formed at each of ends of the heat pipes.
- the heat moved to the heat radiating blocks drive the fan motor and creates a forced convection current to be cooled.
- the plurality of heat dissipating fins can cool electronic components by passing air flow generated from a cooling fan thereinto and discharging the air flow to the outside in a spiral shape with respect to a rotary shaft of the cooling fan.
- the temperature of the heat dissipating fins is cooled through the axial fan, which is mounted on upper parts of the heat dissipating fins where the heat generated from heating components such as CPUs is transferred.
- the upper parts of the heat dissipating fins first face with wind created by the axial fan to be cooled, and then lower parts thereof become cooled sequentially.
- the power of the wind by the axial fan is decreased by interference of the heat dissipating fins, thereby reducing cooling efficiency.
- An aspect of the present invention is to provide a heat sink.
- one aspect of the present invention is to provide a heat sink for improving inflow and discharging of air by repeatedly splitting each of stages of heat dissipation fins by rotating a centrifugal fan after the centrifugal fan for arranging the heat dissipation fins in a multi-stage concentric circle shape and a heat dissipation plate are mutually combined.
- Embodiments of the present invention provide 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.
- 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.
- 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.
- the blades are arranged to be crossed between the channels and paths of each of stages in the heat dissipation plate.
- a heat sink according to the present invention after the centrifugal fan for arranging heat dissipation fins in a multi-stage concentric circle shape and a heat dissipation plate are mutually combined, repeatedly splits each of stages of heat dissipation fins by rotating a centrifugal fan to generate an internal/external pressure difference of the heat sink, so that external air flow is increased, thereby improving cooling efficiency.
- FIG. 2 is a perspective view illustrating a heat sink in accordance with an embodiment of the present invention.
- FIG. 4 is a front view illustrating a heat dissipation plate of a heat sink in accordance with an embodiment of the present invention.
- FIG. 5 is a front view illustrating a centrifugal fan of a heat sink in accordance with an embodiment of the present invention.
- FIG. 6 is a cross-sectional view illustrating a heat sink in accordance with an embodiment of the present invention.
- FIG. 7 is a photograph showing an experimental test of a heat sink in accordance with an embodiment of the present invention.
- FIG. 1 is an exploded, perspective view illustrating a heat sink in accordance with an embodiment of the present invention.
- FIG. 2 is a perspective view illustrating a heat sink in accordance with an embodiment of the present invention.
- FIG. 3 is a side sectional view illustrating a heat sink in accordance with an embodiment of the present invention.
- FIG. 4 is a front view illustrating a heat dissipation plate of a heat sink in accordance with an embodiment of the present invention.
- FIG. 5 is a front view illustrating a centrifugal fan of a heat sink in accordance with an embodiment of the present invention.
- FIG. 6 is a cross-sectional view illustrating a heat sink in accordance with an embodiment of the present invention.
- FIG. 7 is a photograph showing an experimental test of a heat sink in accordance with an embodiment of the present invention.
- a heat sink 10 As shown in FIGS. 1 to 6 , a heat sink 10 according to the present invention comprises a heat dissipation plate 200 and a centrifugal fan 100 .
- the heat dissipation plate 200 includes a second plate flange 210 .
- a motor 220 is fixed vertically upward at a center of an upper surface of the second flange 210 .
- a rotary shaft 221 of the motor is positioned upward.
- a heat dissipation fin 230 with a face is mounted to be located upright on the upper surface of the second flange 210
- a plurality of heat dissipation fins 230 are isolated at a predetermined interval and arranged in a circle at the same time. Between isolated spaces of the heat dissipation fins 230 , a path 250 for inducing air flow is formed.
- the path 250 is a space between the sequentially isolated heat dissipation fins 230 at equal intervals and has a virtual arc shape which is radiated outwardly from a center of the second flange 210 under the condition that the heat dissipation fins 230 are arranged in a multi-stage concentric circle shape.
- the plurality of heat dissipation fins with a circular structure are arranged in the multi-stage concentric circle shape, thereby slowing down air flow between each of the stages, so that a channel 240 for heat exchanging in the heat dissipation fin 230 is formed.
- the centrifugal 100 includes a first plate flange 110 .
- a plurality of blades 140 with faces that are vertically downward 110 are mounted on a lower surface of the first flange
- the blades 140 are arranged in a multi-stage concentric circle shape to be positioned between the channels 240 .
- the position of the blade 140 at each of the stages is arranged to be crossed, so that the blade 140 alternatively interrupts the channel 240 and path 250 at each of the stages.
- One side of the heat dissipation fin 230 and blade 140 has an incline line.
- the incline line has an angle inside from outside thereof toward a rotational direction of the centrifugal fan 100 . Accordingly, air can smoothly flow at a step type at each of the stages of the channel 240 .
- the heat sink 10 with above-mentioned structure according to the present invention is adheredly mounted to an electronic component for requiring a cooling system.
- the channel 240 located most inside the blades 140 and heat dissipation fin 230 arranged in a multi-stage concentric circle shape is a first stage, and the channels located outside the first stage are a second step, and a third step, respectively.
- the first flange 110 rotates the blade 140 in line with the combination block, which is fixed in one entity with the rotary shaft 221 .
- the blade 140 becomes rotated in each of the channels 240 of the heat dissipation plate 200 .
- the air is thermally conducted and then flows to channel 240 of the third step through the path 250 .
- This process is repeatedly performed, so that the air is discharged to the outside through the path 250 , which is located most outside.
- the heat dissipation plate 200 receiving heat through the second flange 200 adhered to an electronic component for requiring cooling can be cooled by inflowing outer air.
- a heater is connected to a bottom surface of the heat sink 10 . Then, heat is provided to set up a general heat environment of electronic components. To measure heat temperature varied depending on the number of revolutions of the centrifugal fan in the heat sink 10 , an apparatus for measuring heat is prepared.
- thermal resistance is measured, there is given:
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.
Description
- 1. Field of the Invention
- The present invention relates generally to heat sinks. More particularly, the invention relates to a heat sink for enhancing cooling efficiency due to the improvement of air flow generated by splitting zones of heat dissipation fins, which are configured with a multi-stage concentric circle shape after the heat dissipation fins and blades are arranged in a multi-stage circle shape and mutually combined.
- 2. Description of the Related Art
- Due to the current trend toward highly integration, highly efficiency, miniaturization of semiconductor chips, packages, and the like, electronic components become highly efficient rapidly. Accordingly, there have been various attempts to maintain efficiency of electronic components by efficiently and rapidly discharging heat generated while operating the electronic components. This heat discharging is associated with the development in the electronic components.
- Particularly, as the capacity of CPUs and peripheral electronic elements become relatively large, heat amount is extremely increased.
- To stably secure functions of electronic components, cooling means have been adopted.
- To solve the aforementioned problems in the prior art, Korean Laid-Open Patent Publication No. 2004-52010 entitled “Apparatus for cooling electronic chip” that was previously proposed discloses a terminal base transfers the heat by directly contacting to a heated element such as a CPU. Heat pipes are soldered to an upper part of the terminal base. Heat radiating blocks are soldered to an end of the heat pipe. A fan motor supplies a cooling fluid to the heat radiating block by placing to a center of the heat radiating block. A base frame fixes the fan motor and the terminal base. A fan cover efficiently inflows/discharges the cooling fluid by blocking a majority portion excepting the upper center of the part installing the fan motor. The fan cover formed to a lower side of the heat pipe is formed as one body by soldering to the heat pipe. Thus, the heat of the heat pipe is transferred/discharged to the air.
- In the above mentioned apparatus, heat generated from heating elements such as CPUs is conducted through the terminal base to the heat pipes, and then moved to the heat radiating blocks that are formed at each of ends of the heat pipes. The heat moved to the heat radiating blocks drive the fan motor and creates a forced convection current to be cooled.
- Also, Korean Laid-Open Patent Publication No. 2004-52010 entitled “Apparatus for cooling computer parts and method of manufacturing the same” that was previously proposed discloses The apparatus includes a heat transferring block capable of being thermally coupled to the heat generating parts to conduct the heat generated by the heat dissipating parts, at least one heat pipe, each including a block coupling portion thermally coupled to the heat transferring block and a fin coupling portion formed of a generally curved shape composed essentially of one or more circular arc portions, and a plurality of heat dissipating fins, each having at least one perforation hole. The geometry of the curvature of the entirety of the fin coupling portion is shaped so that the geometry alone would not allow the heat pipe to be inserted through the perforation hole of the heat dissipating fins. The fin coupling portion of the heat pipe passes through each of the at least one perforation hole of the plurality of heat dissipating fins. Each of the heat dissipating fins are spaced apart from one another along the fin coupling portion and positioned to the fin coupling portion.
- When heat is transferred to the heat transferring block, it escapes through the air through the heat pipe at parts excepting combination parts with the heat transferring block. As a result, the heat is cooled. The plurality of heat dissipating fins can cool electronic components by passing air flow generated from a cooling fan thereinto and discharging the air flow to the outside in a spiral shape with respect to a rotary shaft of the cooling fan.
- However, in the above-mentioned apparatus for cooling, there is a problem in that outer air inflows according to a rotary shaft of a fan employing an axial fan and passes heat dissipating fins to be discharged toward an axial direction, thereby reducing cooling efficiency.
- In other words, the temperature of the heat dissipating fins is cooled through the axial fan, which is mounted on upper parts of the heat dissipating fins where the heat generated from heating components such as CPUs is transferred. The upper parts of the heat dissipating fins first face with wind created by the axial fan to be cooled, and then lower parts thereof become cooled sequentially.
- In this case, the power of the wind by the axial fan is decreased by interference of the heat dissipating fins, thereby reducing cooling efficiency.
- Due to the interference of the heat dissipating fins, the cooling power on the lower parts of the heat dissipating fins positioned at a region close to a CPU is reduced. For this reason, the temperature is high on the lower parts of the heat dissipating fins located at a region close to a CPU. To the contrary, on upper parts of the heat dissipating fins located at a region far from the CPU, the temperature is relatively low. As a result, heat discharging efficiency is reduced.
- Accordingly, the present invention is to address the above-mentioned problems and/or disadvantages and to offer at least the advantages described below.
- An aspect of the present invention is to provide a heat sink. Particularly, one aspect of the present invention is to provide a heat sink for improving inflow and discharging of air by repeatedly splitting each of stages of heat dissipation fins by rotating a centrifugal fan after the centrifugal fan for arranging the heat dissipation fins in a multi-stage concentric circle shape and a heat dissipation plate are mutually combined.
- Embodiments of the present invention provide 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.
- In some embodiments of the present invention, 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.
- In some embodiments of the present invention, 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.
- In some embodiments of the present invention, 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.
- In some embodiments of the present invention, the blades are arranged to be crossed between the channels and paths of each of stages in the heat dissipation plate.
- In some embodiments of the present invention, 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.
- Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.
- As above mentioned, a heat sink according to the present invention, after the centrifugal fan for arranging heat dissipation fins in a multi-stage concentric circle shape and a heat dissipation plate are mutually combined, repeatedly splits each of stages of heat dissipation fins by rotating a centrifugal fan to generate an internal/external pressure difference of the heat sink, so that external air flow is increased, thereby improving cooling efficiency.
- Furthermore, the heat sink according to the present invention is formed by superimposing the centrifugal fan and dissipation plate, thereby minimizing a volume. As a result, the miniaturization of products is possible.
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FIG. 1 is an exploded, perspective view illustrating a heat sink in accordance with an embodiment of the present invention. -
FIG. 2 is a perspective view illustrating a heat sink in accordance with an embodiment of the present invention. -
FIG. 3 is a side sectional view illustrating a heat sink in accordance with an embodiment of the present invention. -
FIG. 4 is a front view illustrating a heat dissipation plate of a heat sink in accordance with an embodiment of the present invention. -
FIG. 5 is a front view illustrating a centrifugal fan of a heat sink in accordance with an embodiment of the present invention. -
FIG. 6 is a cross-sectional view illustrating a heat sink in accordance with an embodiment of the present invention. -
FIG. 7 is a photograph showing an experimental test of a heat sink in accordance with an embodiment of the present invention. -
<Brief explanation of essential parts of the drawings> 10: Heat sink, 100: Centrifugal Fan, 110: First Flange, 111: Inflow Hole, 120: Rib, 130: Combination Block, 131: Connection Hole, 140: Blade, 150: Incline Line, 200: Heat Dissipation Plate, 210: Second Flange, 220: Motor, 221: Rotary Shaft, 230: Heat Dissipation fin, 240: Channel. - Exemplary, non-limiting embodiments of the present invention will now be described more fully with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, the disclosed embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The principles and features of this invention may be employed in varied and numerous embodiments without departing from the scope of the invention.
- Furthermore, well known or widely used techniques, elements, structures, and processes may not be described or illustrated in detail to avoid obscuring the essence of the present invention. Although the drawings represent exemplary embodiments of the invention, the drawings are not necessarily to scale and certain features may be exaggerated or omitted in order to better illustrate and explain the present invention.
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FIG. 1 is an exploded, perspective view illustrating a heat sink in accordance with an embodiment of the present invention.FIG. 2 is a perspective view illustrating a heat sink in accordance with an embodiment of the present invention.FIG. 3 is a side sectional view illustrating a heat sink in accordance with an embodiment of the present invention.FIG. 4 is a front view illustrating a heat dissipation plate of a heat sink in accordance with an embodiment of the present invention.FIG. 5 is a front view illustrating a centrifugal fan of a heat sink in accordance with an embodiment of the present invention.FIG. 6 is a cross-sectional view illustrating a heat sink in accordance with an embodiment of the present invention.FIG. 7 is a photograph showing an experimental test of a heat sink in accordance with an embodiment of the present invention. - As shown in
FIGS. 1 to 6 , aheat sink 10 according to the present invention comprises aheat dissipation plate 200 and acentrifugal fan 100. - The
heat sink 10 generates a pressure difference of inter/outer air to inflow outer air thereinto. Then, the heat sink discharges outer air to the outside, so that a heat exchanging mechanism occurs. - The
heat dissipation plate 200 includes asecond plate flange 210. Amotor 220 is fixed vertically upward at a center of an upper surface of thesecond flange 210. Arotary shaft 221 of the motor is positioned upward. - And, a
heat dissipation fin 230 with a face is mounted to be located upright on the upper surface of thesecond flange 210 - In this case, a plurality of
heat dissipation fins 230 are isolated at a predetermined interval and arranged in a circle at the same time. Between isolated spaces of theheat dissipation fins 230, apath 250 for inducing air flow is formed. - The
path 250 is a space between the sequentially isolatedheat dissipation fins 230 at equal intervals and has a virtual arc shape which is radiated outwardly from a center of thesecond flange 210 under the condition that theheat dissipation fins 230 are arranged in a multi-stage concentric circle shape. - The plurality of heat dissipation fins with a circular structure are arranged in the multi-stage concentric circle shape, thereby slowing down air flow between each of the stages, so that a
channel 240 for heat exchanging in theheat dissipation fin 230 is formed. - The
channel 240 is at least one or more, and the following descriptions will be given on the assumption that the number of thechannel 240 is four and formed as four stages in the present invention. - And, the centrifugal 100 includes a
first plate flange 110. A plurality ofblades 140 with faces that are vertically downward 110 are mounted on a lower surface of the first flange - The
blades 140 are arranged in a multi-stage concentric circle shape to be positioned between thechannels 240. The position of theblade 140 at each of the stages is arranged to be crossed, so that theblade 140 alternatively interrupts thechannel 240 andpath 250 at each of the stages. - One side of the
heat dissipation fin 230 andblade 140 has an incline line. The incline line has an angle inside from outside thereof toward a rotational direction of thecentrifugal fan 100. Accordingly, air can smoothly flow at a step type at each of the stages of thechannel 240. - Moreover, the
centrifugal fan 100 forms aninflow hole 111 at a center of thefirst flange 110. Thecentrifugal fan 100, after positioning acombination block 130 supported by arib 120 at a center of theinflow hole 111, is rendered to be rotated by fixing therotary shaft 221 of themotor 220 by theconnection hole 131 of the combination block 130 in theheat dissipation plate 200. - The
heat sink 10 with above-mentioned structure according to the present invention is adheredly mounted to an electronic component for requiring a cooling system. - Hereinafter, the heat sink according to the present invention will be described in more detail later.
- In advance, the following descriptions will be given on the assumption that the
channel 240 located most inside theblades 140 andheat dissipation fin 230 arranged in a multi-stage concentric circle shape is a first stage, and the channels located outside the first stage are a second step, and a third step, respectively. - When the rotary shat 221 is rotated by applying a drive signal to the
motor 220, thefirst flange 110 rotates theblade 140 in line with the combination block, which is fixed in one entity with therotary shaft 221. - Here, the
blade 140 becomes rotated in each of thechannels 240 of theheat dissipation plate 200. - Outer air inflows into the
inflow hole 111 of thecentrifugal fan 100, and then inflows into the channel of the second stage through thepath 250 of the first stage. The inflown air flows to the channels between front and rear sides of twoheat dissipation fins 230 located at thechannel 240 of the second stage through theblade 140 of the second stage. - At this time, the air is thermally conducted and then flows to channel 240 of the third step through the
path 250. This process is repeatedly performed, so that the air is discharged to the outside through thepath 250, which is located most outside. - Like this, when air flow is performed in the
heat dissipation fin 230, theheat dissipation plate 200 receiving heat through thesecond flange 200 adhered to an electronic component for requiring cooling can be cooled by inflowing outer air. - Experimental embodiments of a heat power in the
heat sink 10 according to the present invention will be described below under the following condition. - A heater is connected to a bottom surface of the
heat sink 10. Then, heat is provided to set up a general heat environment of electronic components. To measure heat temperature varied depending on the number of revolutions of the centrifugal fan in theheat sink 10, an apparatus for measuring heat is prepared. - The value measured by the above apparatus is shown in Table 1.
-
TABLE 1 RPM of Thermal heat sink resistance (K/W) 550 0.87152 580 0.83054 710 0.76863 720 0.75675 815 0.70693 850 0.67474 965 0.62133 1015 0.60006 1075 0.57428 1100 0.53267 1190 0.51314 - By substituting the measured value into the formula 1 and then dividing the difference between the maximum temperature and the temperature of external fluid by the heat amount applied to the
heat sink 10, thermal resistance is measured, there is given: -
- The following graph shows the deducted results.
- As well known in the above, we found that the temperature becomes dramatically reduced as the RPM of the
heat sink 10 is increased. In this case, we proved excellent cooling efficiency of theheat sink 10. - While this invention has been particularly shown and described with reference to an exemplary embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/KR2009/007159 WO2011068259A1 (en) | 2009-12-02 | 2009-12-02 | Heatsink |
Publications (1)
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US20120305224A1 true US20120305224A1 (en) | 2012-12-06 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/513,507 Abandoned US20120305224A1 (en) | 2009-12-02 | 2009-12-02 | Heat sink |
Country Status (3)
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US (1) | US20120305224A1 (en) |
CN (1) | CN102713486A (en) |
WO (1) | WO2011068259A1 (en) |
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WO2016041854A1 (en) * | 2014-09-16 | 2016-03-24 | Philips Lighting Holding B.V. | Cooling fan |
US20160178289A1 (en) * | 2013-08-21 | 2016-06-23 | CoolChip Technologies, Inc. | Kinetic heat-sink with interdigitated heat-transfer fins |
US20170066072A1 (en) * | 2014-02-28 | 2017-03-09 | Fuji Machine Mfg. Co., Ltd. | Viscous fluid coating device |
WO2018128661A2 (en) | 2016-10-17 | 2018-07-12 | Waymo Llc | Thermal rotary link |
DE102017107652B4 (en) * | 2016-04-15 | 2021-04-22 | Delta Electronics, Inc. | IMPELLER AND CENTRIFUGAL FAN WITH THIS |
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CN109505803B (en) * | 2018-11-30 | 2023-10-27 | 江苏维尔特泵业有限公司 | Hot water pump bearing body air cooling device |
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US20160178289A1 (en) * | 2013-08-21 | 2016-06-23 | CoolChip Technologies, Inc. | Kinetic heat-sink with interdigitated heat-transfer fins |
JP2016528743A (en) * | 2013-08-21 | 2016-09-15 | クールチップ テクノロジーズ, インコーポレイテッド | Motion heat sink with integrated heat transfer fins |
US20170066072A1 (en) * | 2014-02-28 | 2017-03-09 | Fuji Machine Mfg. Co., Ltd. | Viscous fluid coating device |
US9969023B2 (en) * | 2014-02-28 | 2018-05-15 | Fuji Machine Mfg. Co., Ltd. | Viscous fluid coating device |
WO2016041854A1 (en) * | 2014-09-16 | 2016-03-24 | Philips Lighting Holding B.V. | Cooling fan |
US9850907B2 (en) | 2014-09-16 | 2017-12-26 | Philips Lighting Holding B.V. | Cooling fan |
DE102017107652B4 (en) * | 2016-04-15 | 2021-04-22 | Delta Electronics, Inc. | IMPELLER AND CENTRIFUGAL FAN WITH THIS |
WO2018128661A2 (en) | 2016-10-17 | 2018-07-12 | Waymo Llc | Thermal rotary link |
WO2018128661A3 (en) * | 2016-10-17 | 2018-08-30 | Waymo Llc | Thermal rotary link |
EP3494618A4 (en) * | 2016-10-17 | 2020-04-01 | Waymo LLC | Thermal rotary link |
US10749308B2 (en) | 2016-10-17 | 2020-08-18 | Waymo Llc | Thermal rotary link |
US11569629B2 (en) | 2016-10-17 | 2023-01-31 | Waymo Llc | Thermal rotary link |
Also Published As
Publication number | Publication date |
---|---|
WO2011068259A1 (en) | 2011-06-09 |
CN102713486A (en) | 2012-10-03 |
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