Housing temperature suppressing structure in electronic device and portable computer
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H05K-007/10
G06F-001/20
출원번호
UP-0927381
(2007-10-29)
등록번호
US-7643284
(2010-02-11)
우선권정보
JP-2006-293408(2006-10-30)
발명자
/ 주소
Nakamura, Fusanobu
출원인 / 주소
Lenovo Singapore Pte. Ltd
대리인 / 주소
Kunzler & McKenzie
인용정보
피인용 횟수 :
33인용 특허 :
7
초록▼
The present invention provides a portable computer in which an increase in temperature of a housing is suppressed. In the present invention, a guide plate is provided to suppress an increase in temperature of a bottom surface. When a cooling fan device operates, outside air taken in from inlet openi
The present invention provides a portable computer in which an increase in temperature of a housing is suppressed. In the present invention, a guide plate is provided to suppress an increase in temperature of a bottom surface. When a cooling fan device operates, outside air taken in from inlet openings flows as an air current through a narrow flow path formed between the guide plate and the bottom surface. A flow velocity of the air current can be increased by narrowing the flow path, and heat exchange with the guide plate can be effectively performed, thereby sufficiently cooling a cooling surface. The cooled guide plate cools an air layer between the guide plate and the heat sink and thermally insulates between the air layer and the bottom surface.
대표청구항▼
What is claimed is: 1. A portable computer having: a main processor; a heat sink comprising an air inflow portion and an air outflow portion thermally coupled with the main processor; a cooling fan device which sends air from a cooling fan device inlet portion to the air inflow portion in the heat
What is claimed is: 1. A portable computer having: a main processor; a heat sink comprising an air inflow portion and an air outflow portion thermally coupled with the main processor; a cooling fan device which sends air from a cooling fan device inlet portion to the air inflow portion in the heat sink; a housing with a housing surface comprising a housing bottom surface in which an inlet opening, through which outside air taken in by the cooling fan devices passes, is formed directly below the heat sink and a housing side surface in which an exhaust opening communicating with the air outflow portion in the heat sink is formed; and a guide plate which is formed between the heat sink and the housing bottom surface with a gap between the guide plate and the housing bottom surface, the guide plate covering the inlet opening and comprising a cooling surface extending from the housing surface over the inlet opening to the cooling fan device inlet portion and straightening vanes extending from the cooling surface to the housing bottom surface, the cooling surface absorbing heat radiated from the heat sink and diffusing the absorbed heat into air flowing from the inlet opening to the cooling fan device inlet portion. 2. The portable computer according to claim 1, wherein the guide plate is formed of a material selected from a metal material and a plastic material and the absorbed heat is diffused from the cooling surface into the air flowing from the inlet opening to the inlet portion of the cooling fan device over a distance in the range of one to four centimeters. 3. The portable computer according to claim 1, wherein the cooling surface, the straightening vanes, the housing bottom surface, and the housing side surface are formed into a chamber structure in which a part near the inlet portion of the cooling fan device alone is opened to the chamber structure and to communicate with the inlet opening. 4. The portable computer according to claim 1, wherein the cooling fan device has an exhaust portion communicating with the air inflow portion in the heat sink. 5. The portable computer according to claim 1, wherein a periphery of the air outflow portion in the heat sink is hermetically sealed with respect to the housing, and an accumulated air layer is formed between a lower part of the heat sink and the guide plate cooling surface when the cooling fan device operates. 6. The portable computer according to claim 1, wherein the straightening vanes controlling a direction of the air flowing from the inlet opening to the inlet portion of the cooling fan device. 7. The portable computer according to claim 1, further comprising a plurality of inlet openings formed in the housing through which outside air taken in by the cooling fan device. 8. The portable computer according to claim 1, wherein the inner space of the housing is maintained to have a negative pressure with respect to outside air by an operation of the cooling fan device. 9. The portable computer according to claim 1, wherein the heat sink is coupled with the main processor through a heat pipe. 10. A portable computer having: a main processor; a video chip; a first heat sink comprising an air inflow portion and an air outflow portion thermally coupled with the main processor; a second heat sink comprising an air inflow portion and an air outflow portion thermally coupled with the video chip; a cooling fan device which sends air from an inlet portion of the cooling fan device to the air inflow portion in the first heat sink and the air inflow portion in the second heat sink, respectively; a housing with a housing surface comprising a housing bottom surface in which a first inlet opening, through which outside air taken in by the cooling fan device passes, is formed directly below the first heat sink and a second inlet opening, through which outside air taken in by the cooling fan device passes, is formed directly below the second heat sink, a first housing side surface in which a first exhaust opening communicating with the air outflow portion in the first heat sink is formed, and second housing side surface in which a second exhaust opening communicating with the air outflow portion in the second heat sink is formed; and a guide plate which is arranged between the first heat sink, the second heat sink, and the housing bottom surface with a gap between the guide plate and the housing bottom surface, the guide plate covering the first inlet opening and the second inlet opening and comprising a cooling surface extending from the housing surface over the first inlet opening and the second inlet opening to the cooling fan device inlet portion and straightening vanes extending from the cooling surface to the housing bottom surface, the cooling surface absorbing heat radiated from the heat sink and diffusing the absorbed heat into air flowing from the first inlet opening and the second inlet opening to the cooling fan device inlet portion. 11. The portable computer according to claim 10, wherein the main processor is coupled with the first heat sink through a first heat pipe, and the video chip is coupled with the second heat sink through a second heat pipe. 12. The portable computer according to claim 10, wherein the first housing side surface is adjacent to the second housing side surface; surface at a corner of the housing. 13. The portable computer according to claim 10, wherein a periphery of the air outflow portion in the first heat sink and a periphery of the air outflow portion in the second heat sink are respectively hermetically sealed with respect to the housing, and an accumulated air layer is formed between a lower part of the first heat sink, a lower part of the second heat sink, and the guide plate and the absorbed heat is diffused from the cooling surface into the air flowing from the first inlet opening and second inlet opening to the inlet portion of the cooling fan device over a distance in the range of one to four centimeters. 14. A housing temperature suppressing structure in an electronic device, having: a cooling fan device comprising an inlet portion and sending air from the cooling fan device inlet portion to an air inflow portion of a heat sink; a housing accommodating a heat generator with a housing surface comprising a housing bottom surface and a housing side surface; in which an exhaust opening communicating with an air outflow portion in the heat sink is formed; the heat sink comprising the air inflow portion and absorbing heat from the heat generator and diffusing the heat in the air sent by the cooling fan device to the air inflow portion; an exhaust structure which discharges the air passing through the heat sink to the outside of the housing while avoiding contact with air in the housing; and a cooling/thermal insulating insulation structure comprising the housing bottom surface in which an inlet opening, through which outside air taken in by the cooling fan device passes, is formed directly below the heat sink, and a guide plate which is arranged between the heat sink and the housing bottom surface with a gap between the guide plate and the housing bottom surface, the guide plate covering the inlet opening and comprising a cooling surface extending from the housing surface over the inlet opening to the cooling fan device inlet portion and straightening vanes extending from the cooling surface to the housing bottom surface, the cooling surface absorbing heat radiated from the heat sink and diffusing the absorbed heat into air flowing from the inlet opening to the cooling fan device inlet portion. 15. The housing temperature suppressing structure according to claim 14, wherein the air flowing between the guide plate and the housing bottom surface from the inlet opening to the inlet portion of the cooling fan device thermally insulates a space between the heat sink and the housing bottom surface. 16. The housing temperature suppressing structure according to claim 14, wherein the exhaust structure includes an exhaust opening formed in the housing side surface, and a communication structure which hermetically seals and communicates with the exhaust opening and an air outflow portion in the heat sink. 17. The housing temperature suppressing structure according to claim 14, wherein the guide plate forms a flow path in which outside air taken in from the inlet opening is prevented from coming into contact with air in the housing, the flow path being extended from the inlet opening to a part near the inlet portion of the cooling fan device.
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이 특허에 인용된 특허 (7)
Kim,Ye Yong; Ko,Ki Tak, Cooling apparatus for portable computer.
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