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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/049262
Kind Code:
A ceiling-embedded type illumination device (1A) is provided with a light source (2), a heatsink (3) having a plurality of heat-dissipating fins (3a), for dissipating heat generated by the light source (2), a housing (4) which includes a first vent hole (4a) and which covers the heatsink (3) at least partly, and a cooling fan (5) for generating an airflow for cooling the heatsink (3). The volume of a space occupied by the cooling fan (5) is smaller than the volume of a space occupied by the heatsink (3). The inner space of the housing (4) is in fluid communication with a space (200) under a ceiling (100) via the first vent hole (4a). An attic space (300) is a space over the ceiling (100) and outside the housing (4). The cooling fan (5) sucks air into the inner space of the housing (4) from the space (200) under the ceiling (100) through the first vent hole (4a), and releases the sucked air into the attic space (300).

FUSHIE, Ryo (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
MATSUBARA, Daisuke (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
YOSHINO, Hayato (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
Publication Date:
March 14, 2019
Filing Date:
September 07, 2017
Export Citation:
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MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
MITSUBISHI ELECTRIC LIGHTING CORPORATION (14-40, Ofuna 2-chome Kamakura-sh, Kanagawa 56, 〒2470056, JP)
International Classes:
F21S8/02; F21V23/00; F21V29/503; F21V29/508; F21V29/67; F21V29/77; F21V29/80; F21Y115/10; F21Y115/20; F21Y115/30
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (Takada, Takahashi & Partners Konwa Bldg. 7F, 12-22 Tsukiji 1-chome, Chuo-k, Tokyo 45, 〒1040045, JP)
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