Source: http://www.google.com/patents/US6525939?dq=7253017
Timestamp: 2017-03-25 05:08:55
Document Index: 627078594

Matched Legal Cases: ['application NO. 089213875', 'art 71', 'art 71', 'art 71', 'art 71', 'art 71', 'art 71', 'art 71', 'art 71', 'art 71']

Patent US6525939 - Heat sink apparatus - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA heat sink apparatus for heat dissipation for a CPU includes a fan, a heat sink module and a latch. The fan has at least one attachment hole. The heat sink module is mounted onto the CPU, and is itself a metal heat conduction column having, a plurality of arc-shaped cooling fins radiating from the edge...http://www.google.com/patents/US6525939?utm_source=gb-gplus-sharePatent US6525939 - Heat sink apparatusAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6525939 B2Publication typeGrantApplication numberUS 09/797,938Publication dateFeb 25, 2003Filing dateMar 5, 2001Priority dateAug 8, 2000Fee statusPaidAlso published asUS20020018336Publication number09797938, 797938, US 6525939 B2, US 6525939B2, US-B2-6525939, US6525939 B2, US6525939B2InventorsChuan-Yi Liang, Sho-Chang SunOriginal AssigneeAcer Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (30), Classifications (14), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetHeat sink apparatus
US 6525939 B2Abstract
A heat sink apparatus for heat dissipation for a CPU includes a fan, a heat sink module and a latch. The fan has at least one attachment hole. The heat sink module is mounted onto the CPU, and is itself a metal heat conduction column having, a plurality of arc-shaped cooling fins radiating from the edge of the metal heat conduction column and a plurality of mounting holes positioned at the ends of the arc-shaped cooling fins. In addition, each mounting hole corresponds to a respective attachment hole. The latch comprises at least a latch arm, a plurality of openings and at least one latch hole. The latch arm is secured to the flange at the side of the CPU socket. Each of the openings corresponds to a mounting hole on the arc-shaped cooling fins of the heat sink module and the attachment holes on the fan.
What is claimed is: 1. A heat sink apparatus, which is installed onto a CPU socket and used for heat dissipation for a CPU, comprising:
a fan comprising at least one attachment hole; a heat sink module mounted on said CPU, comprising a metal heat conduction column, a plurality of arc-shaped cooling fins radiating from the edge of said metal heat conduction column and a plurality of mounting holes positioned at the ends of the arc-shaped cooling fins, corresponding to said attachment holes; and a latch comprising a latch arm, a plurality of openings and at least one latch hole, wherein said latch arm is secured to the socket of said CPU, wherein each of said openings correspond to said mounting holes and said attachment holes. 2. The heat sink apparatus according to claim 1, wherein said latch is directly fastened to said heat sink module and said fan is secured to said latch.
3. The heat sink apparatus according to claim 1, wherein said fan is directly fastened to said heat sink module and said latch is secured to said fan.
4. The heat sink apparatus according to claim 1, wherein each arc-shaped cooling fins is an arc-shaped rectangle radiating from said metal heat conduction column.
5. The heat sink apparatus according to claim 1, wherein said metal heat conduction column is a cylinder, the cross sectional area of said cylinder being equal to the cross sectional area of the central axle of said fan.
6. The heat sink apparatus according to claim 1, wherein said metal heat conduction column is in direct contact with said CPU and is hollowed out and filled with a metal having a heat conductibility that is better than the heat conductibility of the metal of said column.
7. The heat sink apparatus according to claim 1, wherein said heat sink module is a single-piece module.
8. A heat sink apparatus, which is used for heat dissipation for computer chips and mounted to the heat generating part of said computer chip, comprising:
a heat sink module, comprising a metal heat conduction column, a plurality of arc-shaped cooling fins radiating from the edge of said metal heat conduction column and a plurality of mounting holes positioned at the ends of the arc-shaped cooling fins, used to mount said heat sink module onto computer chips; and a latch comprising a latch arm, a plurality of openings and at least one latch hole, wherein said latch arm is secured to the socket of said computer chips, wherein each of said openings correspond to said mounting holes. a latch comprising a latch arm, a plurality of openings and at least one latch hole, wherein said latch arm is secured to the socket of said computer chips, wherein each of said openings correspond to said mounting holes and said attachment holes. 9. The heat sink apparatus according to claim 8, wherein each of said arc-shaped cooling fins is an arc-shaped rectangle radiating from said metal heat conduction column.
10. The heat sink apparatus according to claim 8, wherein said metal heat conduction column is a cylinder, and the cross sectional area of said cylinder is approximately equal to the cross sectional area of said computer chips.
11. The heat sink apparatus according to claim 8, wherein said metal heat conduction column, in direct contact with the heat generating part of said computer chips and is hollowed out and filled with a metal having a heat conductibility that is higher than the heat conductibility of the metal of said column.
12. A heat sink module, which is used for heat dissipation for computer chips, comprising:
a metal heat conduction column, said metal heat conduction column being hollowed out and filled with a metal having a heat conductibility that is higher than the heat conductibility of the metal of said column; and a plurality of arc-shaped cooling fins, which form an arc-shaped rectangle and radiate from said metal heat conduction column. 13. The heat sink apparatus according to claim 12, wherein said heat sink module is a single-piece module.
14. The heat sink apparatus according to claim 12, wherein mounting holes are formed at the ends of said arc-shaped cooling fins.
The present application claims priority to Taiwan application NO. 089213875 entitled “Heat sink apparatus” filed on Aug. 8, 2000.
The present invention relates to a heat sink apparatus. More particularly, the present invention relates to a heat sink apparatus used for the heat dissipation of computer chips.
Among the prior art relating to heat sinks, a computer CPU (Central Process Unit) is usually installed together with an extrusion heat sink apparatus or a die-casting heat sink apparatus for heat dissipation. Referring to FIG. 1, the figure illustrates a perspective view of a square extrusion heat sink apparatus 01, comprising a fan 10, a square extrusion heat sink module 20 and a latch 30. In the figure, the base 21 of the square extrusion heat sink module 20 is directly in contact with the heat generating part 71 of the CPU 70. As a result, heat is dissipated immediately to the cooling fins 22. As the fan 10 generates airflow, it guides the airflow to the cooling fins 22 for heat dissipation. In the square extrusion heat sink module 20, the cooling fins 22 extend vertically from the base 21, except for the space across the middle reserved for fixing the latch 30. Together the individual cooling fins 22 form a square on the base 21. The square extrusion heat sink module 20 is mounted on the CPU socket 73 at the flange 72 positioned at both sides of the socket with the latch 30. By coupling the attachment holes 11 on fan 10 and the mounting holes 23 on the square extrusion heat sink module 20, the fan 10 and the square extrusion heat sink module 20 are connected.
FIG. 2 illustrates a perspective view of a die-casting heat sink module 40. The die-casting heat sink module 40 is often applied to notebook computers. The die-casting heat sink module 40 is a single-piece module die-cast. As shown in the figure, the attachment holes 11 on the fan 10 are secured to the mounting holes 41 on the heat sink module 40, and the latch 50 is used to secure the entire heat sink module 40.
Referring back to FIG. 1, the heat sink module 20 (FIG. 1) comprises a base 21, wherein one side is the surface from which the cooling fins 22 extend and the other side is in direct contact with the CPU 70. In this way the heat generated by the CPU 70 is dissipated evenly to the cooling fins 22. The fan 10 generates airflow towards the cooling fins 22 that dissipates heat. With the development of chipset technology, the size of chips is minimized. However, limited by factors such as standards of chipset pins and CPU sockets, current CPU size cannot be further reduced. The heat generated by a CPU comes primarily from the CPU chips not the entire CPU. The currently used heat sink module 20 is in contact with the full surface area of the CPU 70, instead of concentrating on the area where central CPU chips are positioned. As a consequence, it is unable to evenly dissipate heat from the chips of the CPU 70 and from the base 21 of the heat sink module 20 to the cooling fins 22, which results in unsatisfactory heat dissipation. In accordance with the prior art, the cooling fins 22 and the base 21 of the square heat sink module 20 often divert airflow against the fan 10, which also results in unsatisfactory heat convection. The invention provides a heat sink module that reduces the mentioned diverted airflow and accordingly serves to enhance heat dissipation capacity.
According to the concept mentioned above, the prior art heat sink module fails to offer an effective solution to the problem of uneven dissipation of heat from a CPU to the cooling fins. The heat sink apparatus disclosed in the invention provides a metal heat conduction column for heat conduction. The metal heat conduction column is a cylinder. The base of the cylinder covers exactly said heat generating part 71 of the CPU 70, not its entire surface area. As a consequence, the heat from the CPU 70 can be evenly dissipated through the metal cylinder. Furthermore, a plurality of cooling fins extend from the metal column and the cooling fins radiate from the cylinder, which enables it to dissipate heat generated by CPU 70 evenly to the cooling fins and facilitate heat dissipation efficiency.
According to the above-mentioned prior art, the prior art cooling fins 22 and the base 21 of the square heat sink module 20 often divert airflow that affects the performance of the fan 10. The invention further provides arc-shaped cooling fins radiating from the central metal cylinder. The current CPU 70 applies surface mount technology, SMT, in the heat generating part 71, which slightly protrude from the surface of CPU 70. In response to this design, the metal heat conduction column disclosed in the invention is in direct contact with the CPU 70, and arc-shaped cooling fins radiate from the edge of the metal heat conduction column. According to the principles of air dynamics, under said structure, the heat sink apparatus in accordance with the invention allows the airflow generated by the fan to circulate along the arc-shaped cooling fins. Furthermore, the gap between the lower edge of the arc-shaped cooling fins and the CPU surface improves the convection of the airflow.
Another purpose of the invention is to enhance the heat dissipation efficiency of the metal heat conduction column. One option of the invention regarding the metal heat conduction column is to replace the metal material with other more conductive metals such as copper, to improve conduction efficiency between the metal conduction column and CPU 70 and thereby facilitate the dissipation efficiency.
The invention provides a latch to mount the metal heat conduction column onto the CPU. The latch comprises a latch arm, a plurality of openings and at least one latch hole, in which said latch arm is secured to the socket of the CPU. Each of said openings correspond to the mounting holes of the heat sink module 64 and attachment holes of the fan 10. The latch arm is secured to the flange 72 at side of the CPU socket 73 as shown in FIG. 1. The fan 10 and the heat sink module 64 are thereby mounted onto the CPU with the latch and act as the heat sink apparatus disclosed in the invention.
The following detailed description, which is given by way of example and not intended to limit the invention to the embodiments described herein, can best be understood in conjunction with the accompanying drawings, in which:
FIG. 1 illustrates a perspective view of an extrusion heat sink apparatus in accordance with the prior art;
FIG. 2 illustrates a perspective view of a die-casting heat sink apparatus in accordance with the prior art;
FIG. 3 illustrates a perspective view of a heat sink apparatus according to the invention;
FIG. 3A illustrates a heat sink apparatus with a hollow column filled with a second metal according to the invention.
FIG. 4 illustrates a perspective view of a lock member according to the invention;
FIG. 5 illustrates a combinational view of a heat sink apparatus according to the invention.
FIG. 3 illustrates a perspective view of the invention, heat sink module 64, wherein the heat sink module 64 comprises a metal heat conduction column 67, a plurality of arc-shaped cooling fins radiating from the edge of the metal heat conduction column 67, and a plurality of mounting holes 66 positioned at the ends of the cooling fins 65. The heat sink module 64 can be manufactured as a single-piece module by either extruding or die-casting. The metal heat conduction column 67 shown in FIG. 3 is a cylinder, with a base area slightly larger than the area of the heat generating part 71 on CPU 70 and equivalent to the area of axle center 12 of the fan 10. The base of metal heat conduction column 67 is in direct contact with the heat generating part 71 of the CPU 70. In addition, a plurality of arc-shaped cooling fins radiate from the edge of the metal heat conduction column 67. Due to the fact that the cross sectional area of the metal heat conduction column 67 exactly equals the cross sectional area of the central axle 12 of the fan 10, it enables the airflow generated by the fan 10 to pass the heat sink module 64 unhindered and thereby optimizes ventilation. As shown in FIG. 3, at the end of a plurality of arc-shaped cooling fins 65 there are mounting holes 66 designed to secure the fan 10. The metal is in direct contact with the heat generating part 71 on the CPU 70. In order to achieve better heat conduction, the metal heat conduction column 67 can be hollowed out and filled with other metals giving better conductibility, such as copper. Owing to the shape of heat sink module 64, the metal heat conduction column 67 and the arc-shaped cooling fins, are similar to the shape of the fan 10. This enables the airflow generated by the fan 10 to pass the arc-shaped cooling fins 65 unhindered.
FIG. 4 illustrates a perspective view of latch 61 in accordance with the invention, wherein latch 61 can be formed by a metal sheet stamp. The latch 61 has a reversed U shape; it comprises a first surface and a second surface that is perpendicular to the first surface. There is a plurality of openings 63 designed to secure the fan 10 and the heat sink module 64, and an aperture corresponding to the size of the fan 10 designed for ventilation, on the first surface. The second surface comprises a latch arm 62 designed to secure flange 72 at both sides of the socket 73 of the CPU 70, whereby the fan 10 and the heat sink module 64 are mounted onto.
FIG. 5 illustrates a combinational view of a preferred embodiment in accordance with the invention. The preferred embodiment comprises the fan 10, the latch 61 and the heat sink module 64. The fan 10,.the latch 61 and the heat sink module 64 can be combined by screws (not shown) through the attachment holes 11, openings 63 and mounting holes 66. The combination order is the fan 10 followed by the latch 61 and the heat sink module 64 on the bottom. An alternative order of the combination is the latch 61 first, the fan 10 in the middle and the heat sink module 64 at the bottom. Neither of the combinations has any effect upon heat dissipation efficiency of the invention, the heat sink modular 60. The heat sink module 64 dissipates heat by circulating airflow generated by the fan 10 along with the cooling fins 65. Metal heat conduction column 67 is in direct contact with heat generating part 71 of the CPU 70 and thereby conducts the heat to the arc-shaped cooling fins 65; while the airflow generated by fan 10 continues exchanging heat with the arc-shaped cooling fins 65. In the heat-exchange process, the arc-shaped cooling fins 65 radiating from the metal heat conduction column 67 work to benefit the heat-exchange process in accordance with air dynamic principles. Surface mount technology (SMT) currently used in the manufacture of CPU 70, means that the CPU heat generating part 71 slightly protrudes from the surface of the CPU 70. Therefore, when the metal heat conduction column 67 is mounted on the heat generating part 71 of the CPU 70, there is in fact a gap between the arc-shaped cooling fins 65 and the CPU socket 73, which allows the airflow generated by the fan 10 to circulate. This solves the problem of airflow circulation being hindered by the base 21 of the square extrusion heat sink module 20 as shown in FIG. 1, and which occurred in the prior art.
In a comparison test between said invention and said prior art heat sink, the heat dissipation capacity of the prior art square extrusion heat sink module 20, as shown in FIG. 1, which is 3 cm high, delivers the same effect as heat sink module 64 in accordance with the invention, which is 1 cm high. The result indicates that the invention is ideal for heat dissipation for the CPU in a low profile computer system.
While the invention has been described with reference to various illustrative embodiments, the description should not be construed in a limiting sense. Various modifications of the illustrative embodiments, as well as other embodiments of the invention, will be apparent to those people skilled in the art upon reference to this description. It is therefore contemplated that the appended claims will cover any such modifications or embodiments as may fall within the scope of the invention defined by the following claims and their equivalents.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4695924 *Jul 17, 1986Sep 22, 1987Zenith Electronics CorporationTwo piece heat sink with serrated couplingUS5597034 *Jul 1, 1994Jan 28, 1997Digital Equipment CorporationHigh performance fan heatsink assemblyUS5661638 *Nov 3, 1995Aug 26, 1997Silicon Graphics, Inc.High performance spiral heat sinkUS5795685 *Jan 14, 1997Aug 18, 1998International Business Machines CorporationSimple repair method for phase shifting masksUS5943209 *Oct 6, 1997Aug 24, 1999Liu; Yen-WenModularized electronic component cooling apparatusUS6196300 *Jul 27, 1998Mar 6, 2001Maurizio ChecchettiHeat sinkUS6330908 *Jun 27, 2000Dec 18, 2001Foxconn Precision Components Co., Ltd.Heat sinkUS6360816 *Dec 23, 1999Mar 26, 2002Agilent Technologies, Inc.Cooling apparatus for electronic devices* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6653755 *May 30, 2001Nov 25, 2003Intel CorporationRadial air flow fan assembly having stator fins surrounding rotor bladesUS6747865 *Apr 12, 2002Jun 8, 2004Aavid Thermalloy, LlcHeat sink for electronic componentsUS7200934 *Sep 5, 2003Apr 10, 2007Intel CorporationElectronic assemblies with high capacity heat sinks and methods of manufactureUS7493943 *Jul 6, 2005Feb 24, 2009Hon Hai Precision Industry Co., Ltd.Heat collectorUS7539017 *Mar 27, 2003May 26, 2009Kuo Ta ChangHeat dissipating device for central processorUS7911790Aug 23, 2005Mar 22, 2011Intel CorporationElectronic assemblies with high capacity curved and bent fin heat sinks and associated methodsUS8205666Apr 15, 2010Jun 26, 2012Intel CorporationHeat sinks and method of formationUS8295046Jul 19, 2010Oct 23, 2012Hamilton Sundstrand CorporationNon-circular radial heat sinkUS9140502Jul 8, 2010Sep 22, 2015Hamilton Sundstrand CorporationActive structures for heat exchangerUS9565782Feb 11, 2014Feb 7, 2017Ecosense Lighting Inc.Field replaceable power supply cartridgeUS9568665Mar 3, 2015Feb 14, 2017Ecosense Lighting Inc.Lighting systems including lens modules for selectable light distributionUS20020180285 *May 30, 2001Dec 5, 2002Machiroutu Sridhar V.Fan assembly for a computerUS20040045163 *Sep 5, 2003Mar 11, 2004Intel CorporationElectronic assemblies with high capacity heat sinks and methods of manufactureUS20040190245 *Mar 31, 2003Sep 30, 2004Murli TirumalaRadial heat sink with skived-shaped fin and methods of making sameUS20040190257 *Mar 27, 2003Sep 30, 2004Chang Kuo TaHeat dissipating device for central processorUS20050061480 *Oct 14, 2004Mar 24, 2005Carter Daniel P.Heat sinks and method of formationUS20050207119 *Mar 17, 2004Sep 22, 2005Huang Ming THeat dissipation module of an interface cardUS20050280992 *Aug 23, 2005Dec 22, 2005Intel CorporationElectronic assemblies with high capacity curved and bent fin heat sinks and associated methodsUS20070051497 *Jul 6, 2005Mar 8, 2007Hon Hai Precision Industry Co., Ltd.Heat collectorUS20070121293 *Dec 28, 2005May 31, 2007Sunonwealth Electric Machine Industry Co., Ltd.Cooling module holderUS20070193718 *Dec 13, 2006Aug 23, 2007Carter Daniel PHeat sinks and method of formationUS20070230138 *Apr 3, 2007Oct 4, 2007Nidec CorporationHeat sink and fan unitUS20090294114 *Apr 27, 2009Dec 3, 2009Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.Heat dissipation device and manufacturing method thereofUS20090316356 *Jun 19, 2008Dec 24, 2009Hsiung Fei LuEnclosure of electronic deviceUS20100032144 *Mar 5, 2009Feb 11, 2010Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.Heat dissipation deviceUS20100170657 *Jan 6, 2009Jul 8, 2010United Technologies CorporationIntegrated blower diffuser-fin heat sinkUS20100193173 *Apr 15, 2010Aug 5, 2010Intel CorporationHeat sinks and method of formationUS20110232885 *Mar 26, 2010Sep 29, 2011Kaslusky Scott FHeat transfer device with fins defining air flow channelsUS20120268894 *Apr 24, 2012Oct 25, 2012Journee Lighting, Inc.Socket and heat sink unit for use with removable led light moduleUS20130042998 *Aug 17, 2011Feb 21, 2013Bin ChenThermal module mounting holder* Cited by examinerClassifications U.S. Classification361/697, 361/704, 257/E23.086, 361/695, 257/E23.099, 165/121, 257/719International ClassificationH01L23/467, H01L23/40Cooperative ClassificationH01L23/467, H01L23/4093, H01L2924/0002European ClassificationH01L23/40S, H01L23/467Legal EventsDateCodeEventDescriptionMar 5, 2001ASAssignmentOwner name: ACER INC., TAIWANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIANG, C.Y.;SUN, SHO-CHANG;REEL/FRAME:011591/0153Effective date: 20010214Oct 6, 2002ASAssignmentOwner name: ACER INCORPORATED, TAIWANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ACER INCORPORATED;REEL/FRAME:013456/0722Effective date: 20020923Owner name: WISTRON CORPORATION, CHINAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ACER INCORPORATED;REEL/FRAME:013456/0722Effective date: 20020923Aug 25, 2006FPAYFee paymentYear of fee payment: 4Aug 25, 2010FPAYFee paymentYear of fee payment: 8Jul 16, 2014FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services