Title:
HEAT RADIATION UNIT, HEAT RADIATOR, AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2008/004280
Kind Code:
A1
Abstract:
Heat from first and second heat transmission members (19) is transmitted to first and
second heat radiation fins (18). The first and second heat radiation fins (18)
radiate heat to the atmosphere from their surfaces having a large surface area.
The forward end of the second heat radiation fin (18) is faced to a first heat radiation
fin member (17) with a predetermined spacing kept between them. As a result,
hot air is concentrated to the second heat radiation fin member (17). The difference
in temperature between the second heat radiation fin member (17) and the environment
of the fin member (17) increases to create the chimney effect. Heat is efficiently
discharged to the environmental air from the heat radiation fins (18), and heat
radiation efficiency is higher than ever before. To achieve the effect equal
to a conventional level, the surface area of the heat radiation fins (18) can be
smaller. This means that the heat radiation fins (18) and a heat radiation unit
(15) are reduced in size.
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Inventors:
WEI JIE (JP)
TAKEMURA KEIZOU (JP)
TAKEMURA KEIZOU (JP)
Application Number:
PCT/JP2006/313319
Publication Date:
January 10, 2008
Filing Date:
July 04, 2006
Export Citation:
Assignee:
FUJITSU LTD (JP)
WEI JIE (JP)
TAKEMURA KEIZOU (JP)
WEI JIE (JP)
TAKEMURA KEIZOU (JP)
International Classes:
H05K7/20; G06F1/20
Foreign References:
| JPH11168162A | 1999-06-22 | |||
| JP2003287377A | 2003-10-10 | |||
| JPS63226098A | 1988-09-20 | |||
| JPH1195873A | 1999-04-09 | |||
| JP2003287376A | 2003-10-10 | |||
| JP2002043490A | 2002-02-08 |
Attorney, Agent or Firm:
YAMAZAKI, Kaoru (8th FloorGSK Kudan Building,6-10, Kudan-minami 4-chom, Chiyoda-ku Tokyo 74, JP)
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