Title:
VENTILATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/241390
Kind Code:
A1
Abstract:
Disclosed is a ventilation device (1) provided with a bell mouth (6) having an oil dust trapping part (40) for trapping oil dust. The ventilation device (1) is provided with a substantially circular bell mouth upstream opening (41), a substantially circular bell mouth downstream opening (49), and a bell mouth side wall (22) connecting the bell mouth upstream opening (41) and the bell mouth downstream opening (49). The oil dust trapping part (40) has: a trapping part floor surface (43) that is located at the outer periphery of a lower edge portion of the bell mouth upstream opening (41), and extends in the downstream direction substantially orthogonal to the planar surface which is the upstream end portion of the bell mouth (6); a trapping part side wall (44); a trapping part downstream wall (45); and a trapping part upstream wall (46). The trapping part floor surface (43) is arc-shaped and bulges outward in the outer peripheral direction.
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Inventors:
KAWASAKI YUTAKA
SHIMA YASUAKI
KEOROSHI DAIKI
SHIMA YASUAKI
KEOROSHI DAIKI
Application Number:
PCT/JP2021/019140
Publication Date:
December 02, 2021
Filing Date:
May 20, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
F24F7/013
Foreign References:
| JPS5510920U | 1980-01-24 | |||
| JPS5621141U | 1981-02-25 | |||
| JPH0399144A | 1991-04-24 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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