Source: http://www.google.com/patents/US20020126453?dq=7751826
Timestamp: 2017-07-22 06:58:14
Document Index: 349149949

Matched Legal Cases: ['art 200', 'art 200', 'art 200', 'art 200', 'art 200', 'art 200', 'art 200', 'art 200']

Patent US20020126453 - Apparatus for cooling an electronic component and electronic device ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn apparatus for cooling an electric component is provided on an electronic component mounted on a printed circuit board. The apparatus comprises a heat radiation member having a base contacting the electronic component such that heat can be conducted, and a plurality of heat radiation fins provided...http://www.google.com/patents/US20020126453?utm_source=gb-gplus-sharePatent US20020126453 - Apparatus for cooling an electronic component and electronic device comprising the apparatusAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS20020126453 A1Publication typeApplicationApplication numberUS 09/955,069Publication dateSep 12, 2002Filing dateSep 19, 2001Priority dateMar 8, 2001Also published asEP1239716A2, US6469894Publication number09955069, 955069, US 2002/0126453 A1, US 2002/126453 A1, US 20020126453 A1, US 20020126453A1, US 2002126453 A1, US 2002126453A1, US-A1-20020126453, US-A1-2002126453, US2002/0126453A1, US2002/126453A1, US20020126453 A1, US20020126453A1, US2002126453 A1, US2002126453A1InventorsHiroshi UbukataOriginal AssigneeHiroshi UbukataExport CitationBiBTeX, EndNote, RefManReferenced by (17), Classifications (17), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetApparatus for cooling an electronic component and electronic device comprising the apparatus
US 20020126453 A1Abstract
An apparatus for cooling an electric component is provided on an electronic component mounted on a printed circuit board. The apparatus comprises a heat radiation member having a base contacting the electronic component such that heat can be conducted, and a plurality of heat radiation fins provided and standing integrally on the side of the base which is distant from the electronic component. The electronic component and the heat radiation member are surrounded by a duct member which lets air flow through the heat radiation fins. Top ends of the plurality of heat radiation fins which are distant from the base are connected to the duct member such that heat can be conducted. The duct member and the base are connected through a heat pipe such that heat can be conducted. Images(3) Claims(16)
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING [0015] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention. [0016] [0016]FIG. 1 is a schematic view showing the internal structure of an electronic device according to an embodiment of the present invention; [0017] [0017]FIG. 2 is a schematic view showing a cooling mechanism for cooling an electronic component incorporated in the electronic device shown in FIG. 1; [0018] [0018]FIG. 3 is a side view of the cooling mechanism shown in FIG. 2; [0019] [0019]FIG. 4 is a cross-sectional view showing a connecting state between heat radiation fins of the cooling mechanism and a duct member shown in FIG. 2; and [0020] [0020]FIG. 5 is a cross-sectional view showing an installation state of the duct member and a printed circuit board shown in FIG. 2.
DETAILED DESCRIPTION OF THE INVENTION [0021] In the following, an embodiment of the present invention will be specifically explained with reference to the drawings. [0022] [0022]FIG. 1 shows a schematic structure of an electronic device 1 according to the embodiment of the present invention. The electronic device 1 has a casing 10 in which a printed circuit board 11 is contained and provided. The printed circuit board 11 is provided with electronic components 12 such as an MPU or the like and extension slots 13. The electronic component 12 includes a temperature sensor not shown but comprised of a diode. A power source device 14 and a hard disk drive (HDD) 15 are contained and provided in the casing 10. The power source device 14 and HDD 15 are connected with the printed circuit board 11 and are operated and controlled by the electronic component 12. [0023] An air-intake fan 16 is provided on the wall of the casing 10 in the left side in the figure. The air-intake fan 16 is provided near the electronic component 12. An exhaust port 17 is provided in the wall of the casing 10 in the right side opposite to the air-intake fan 16 with the electronic component 12 interposed therebetween. An air-intake duct 18 made of metal having high heat conduction is provided between the air-intake fan 16 and the electronic component 12. The air-intake duct 18 has an end connected so as to cover the air-intake fan 16 and another end connected to a duct member 20 made of metal having high heat conduction. [0024] The duct member 20 has such a shape in which a rectangular plate-like member is bent at two portions in one same direction, as shown in FIGS. 2 and 3. The member 20 is installed on the printed circuit board 11 so as to cover the electronic component 12. Provided also on the printed circuit board 11 is a control chip 19 for operating the air-intake fan 16 in accordance with a detection result of a temperature sensor included in the electronic component 12. [0025] Thus, air supplied into the casing 10 by the air-intake fan 16 passes through the air-intake duct 18 and the duct member 20, and deprives the electronic component 12 of heat. The air which has thus deprived the electronic component 12 of heat is exhausted to the outside of the casing 10 through the exhaust port 17. [0026] Explanation will now be made of a cooling mechanism for depriving the electronic component 12 of heat by air passing through the duct member 20. [0027] As shown in FIGS. 2 and 3, a heat radiation member 21 called a heat sink is provided inside the duct member 20 above the electronic component 12. The heat radiation member 21 has a substantially rectangular plate-like base 211, a plurality of substantially rectangular plate-like heat radiation fins 212 provided to stand substantially at right angles and integrally on the upper surface of the base 211. The lower surface of the base 211 is brought into contact with the upper surface of the electronic component 12 mounted on the printed circuit board 11, over a relatively large area, with a cool sheet 24 inserted therebetween. [0028] The heat radiation fins 212 are provided at a predetermined interval maintained between each other. The base 211 is bridged near both of the bent ends of the duct member 20, such that the heat radiation fins 212 are situated along the flowing direction of air. That is, the base 211 is secured to portions near the lower ends of the duct member 20 by a plurality of screws 22, such that the electronic component 12 is sandwiched between the base 211 and the printed circuit board 11. Also, the top end parts of the plurality of heat radiation fins 212 which are distant from the base 211 are secured, by calking, to the wall part 200 of the duct member 20 which is opposed to the base 211, as enlarged and shown in FIG. 4. [0029] That is, the base 211 is secured to the duct member 20 by screws, and the top end parts of the heat radiation fins 212 are secured to the duct member 20 by calking, so that the heat radiation member 21 is connected, attaining best heat conduction to the duct member 20. [0030] Also, two heat pipes 23 are connected between the heat radiation member 21 and the duct member 20. An end of each heat pipe 23 extends penetrating the inside of the base 211, and another end thereof extends penetrating through the inside of the wall part 200 of the duct member 20. An intermediate part of each heat pipe 23 is curved outside the opening part in the side distant from the air-intake duct 18 of the duct member 20. That is, each heat pipe 23 is connected to the base 211 and the wall part 200, maintaining the best heat conduction. [0031] As described above, a metal adhesion such as a silver paste or a cool sheet may be inserted between members connected with excellent heat conduction, e.g., between the base 211 and the duct member 20, between the heat radiation fins 212 and the wall part 200, between the heat pipes 23 and the base 211, and between the heat pipes 23 and the wall part 200. Alternatively, these members may be connected mechanically by calking or the like. In any cases, it is desirable to adopt a connection state in which the best heat conduction can be obtained between these members. [0032] Note that the cool sheet 24, heat radiation member 21, heat pipes 23, and duct member 20 serve as the cooling mechanism according to the present invention. To improve the cooling efficiency, materials having excellent heat conduction are used as materials forming the respective members of the cooling mechanism. [0033] Meanwhile, two bent end parts of the duct member 20 are connected to the printed circuit board 11, as shown in FIG. 5. That is, a plurality of screw holes 201 are formed in each of the tend parts of the duct member 20. Screws 25 inserted in a plurality of wandering insertion holes 111 formed at corresponding positions on the printed circuit board 11 are screwed in the screw holes 201. More specifically, after the screws 25 are each equipped with a washer 26, a spring member 27, and a spacer member 28, they are inserted into the wandering insertion holes 111 from the back surface side of the printed circuit board 11, and are screwed in the screw holes 201. [0034] At this time, the pressing force against the electronic component 12 of the base 211 can be variably adjusted by adjusting the screwing amount of each screw 25. The screwing length of each screw 25 is defined such that the load of the electronic component 12 to the soldered connecting portions 120 on the printed circuit board 11 is smaller than a tolerable value in a state that the screws 25 are perfectly screwed in the screw holes 201. In this manner, the soldered connecting portions of the electronic are prevented from damages. [0035] Next, heat radiation operation of the electronic component 12 based on the cooling mechanism will be explained. [0036] At first, the electronic component 12 on the printed circuit board 11 is driven by power supplied from the power source device 14 and generates heat. The heat from the electronic component 12 is conducted to the base 211 of the heat radiation member 21 through the cool sheet 24 which contacts the upper surface of the component 12. [0037] The heat thus conducted to the base 211 is conducted to the plurality of heat radiation fins 212 provided and standing on the upper surface of the base 211, to the portions near both ends of the duct member 20 where the base 211 is bridged, and to the wall part 200 of the duct member 20 through the two heat pipes 23. The heat conducted to the wall part 200 of the duct member 20 through the two heat pipes 23 is further conducted to the heat radiation fins 212 from the top end side of the plurality of heat radiation fins 212. By adopting this structure, heat can be efficiently conducted from both ends of each heat radiation fin 212, and the duct member 20 itself and the heat pipes 23 themselves can be let function as heat radiation members. Further, heat is also conducted to the air-intake duct 18 connected to the duct member 20. [0038] When the control chip 19 detects that the temperature of the electronic component 12 has reached a preset temperature by means of the temperature sensor incorporated in the electronic component 12, the air-intake fan 16 is driven so that air is supplied into the casing 10. The air is fed into the duct member 20 through the air-intake duct 18 and flows along the plurality of heat radiation fins 212 of the heat radiation member 21, thereby depriving the heat radiation fins 212 of heat. Further, the air exhausted from the duct member 20 passes through the exhaust port 17 of the casing 10 and is exhausted to the outside of the casing. In this manner, the heat radiation fins 212 of the heat radiation member 21 are cooled so that the electronic component 12 contacting the heat radiation member 21 is cooled. [0039] As has been described above, according to the present embodiment, heat is conducted from the side of the base end parts of the plurality of heat radiation fins 212 through the base 211 of the heat radiation member 21 provided in contact with the electronic member 12 and is also conducted from the side of the top end parts of the heat radiation fins 212 through the wall part 200 of the duct member 20 connected to the base 211 through the heat pipes 23. Therefore, the heat from the electronic component 12 can be effectively conducted to the plurality of heat radiation fins 212. As a result, the area of the heat radiation fins 212 to be heated can be sufficiently increased, compared with a conventional cooling mechanism. The heat radiation effect is thus greatly improved. [0040] Also, in the present embodiment, the duct member 20 and the air-intake duct 18 for feeding air to the heat radiation member 21 also serve as heat radiation members. Therefore, the area of the heat radiation member that is exposed to the air can be increased much more, so that the heat radiation effect can be improved much more. [0041] Further, according to the present embodiment, the cooling mechanism for cooling the electronic component 12 mounted on the printed circuit board 11 can be installed together, by merely installing the duct member 20 to which the heat radiation member 21 is fixed, on the printed circuit board 11. The services for installing the cooling mechanism can thus be simplified. Also, the duct member 20 and the heat radiation member 21 are integrated together, so that the cooling mechanism is downsized and the electronic device can also downsized accordingly. [0042] Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [0043] For example, in the above embodiment, the duct member 20 is provided so as to cover the entire heat radiation member 21. The present invention, however, is not limited thereto. For example, the duct member 20 may be provided so as to cover a part of the heat radiation member 21. [0044] Also, in the above embodiment, one cooling mechanism is installed for one electronic component mounted on the printed circuit board 11. The present invention, however, is not limited thereto but one cooling mechanism may be installed for two electronic components or for every plural electronic components. Alternatively, a cooling mechanism in which two heat radiation members 21 are layered may be installed for one electronic component 12. [0045] Further, the above embodiment adopts an air-path structure in which the duct member 20 and the air-intake fan 16 are connected by the air-intake duct 18. The present invention, however, is not limited thereto but the air-intake duct 18 need not always be inserted between the duct member 20 and the air-intake fan 16. In addition, in place of the air-intake fan, an exhaust fan may be provided at the exhaust port 17. Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7046512 *Oct 6, 2004May 16, 2006Patent-Treuhand & Gesellschaft Fuer Elektrische Gluehlampen MbhOperating circuit for a lamp with a heat sinkUS7542293 *Apr 10, 2006Jun 2, 2009Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.Thermal moduleUS7826215Feb 15, 2008Nov 2, 2010International Business Machines CorporationDucted air temperature sensorUS7835152 *Mar 10, 2009Nov 16, 2010Inventec CorporationHeat dissipating moduleUS8493737 *Jul 23, 2010Jul 23, 2013Kabushiki Kaisha ToshibaPressing member, pressing structure for heat receiving block of substrate, and electronic deviceUS8634194 *Jun 3, 2011Jan 21, 2014Denso CorporationPower conversion apparatusUS9013879 *Dec 4, 2012Apr 21, 2015Hamilton Sundstrand CorporationElectronic component cooling hood and heat pipeUS20040108104 *Mar 24, 2003Jun 10, 2004Chin-Kuang LuoAxial heat-dissipating deviceUS20050078458 *Oct 6, 2004Apr 14, 2005Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen MbhOperating circuit for a lamp with a heat sinkUS20050208797 *Mar 19, 2004Sep 22, 2005Infineon Technologies North America Corp.Pin headerUS20070236885 *Apr 10, 2006Oct 11, 2007Foxconn Technology Co., Ltd.Thermal moduleUS20090207565 *Feb 15, 2008Aug 20, 2009International Business Machines CorporationDucted Air Temperature SensorUS20100124026 *Mar 10, 2009May 20, 2010Inventec CorporationHeat dissipating moduleUS20100128431 *Mar 7, 2008May 27, 2010Andre Sloth EriksenHybrid liquid-air cooled graphics display adapterUS20110075370 *Jul 23, 2010Mar 31, 2011Kabushiki Kaisha ToshibaPressing member, pressing structure for heat receiving block of substrate, and electronic deviceUS20110299243 *Jun 3, 2011Dec 8, 2011Denso CorporationPower Conversion ApparatusUS20140153191 *Dec 4, 2012Jun 5, 2014Hamilton Sundstrand CorporationElectronic Component Cooling Hood and Heat Pipe* Cited by examinerClassifications U.S. Classification361/720, 257/E23.099, 257/E23.088, 257/E23.084International ClassificationH01L23/467, H05K7/20, H01L23/427, H01L23/40Cooperative ClassificationH01L2924/00014, H01L23/427, H01L23/467, H01L23/4006, H01L2224/16225, H01L2224/73253European ClassificationH01L23/427, H01L23/40B, H01L23/467Legal EventsDateCodeEventDescriptionNov 1, 2001ASAssignmentOwner name: KABUSHIKI KAISHA TOSHIBA, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UBUKATA, HIROSHI;REEL/FRAME:012293/0951Effective date: 20010914May 10, 2006REMIMaintenance fee reminder mailedOct 23, 2006LAPSLapse for failure to pay maintenance feesDec 19, 2006FPExpired due to failure to pay maintenance feeEffective date: 20061022RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services