Ceiling-embedded ventilation fan

Details Ceiling-embedded ventilation fan Ceiling-embedded ventilation fan

2010-03-12

2011-11-22

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Miscellaneous

Reexamination Certificate

active

08061985

ABSTRACT:
A ceiling-embedded ventilation fan includes: a casing provided in a box-shape frame inserted and mounted in a ceiling and having an opening facing an indoor side in a lower face thereof, the casing having a side face formed in a scroll shape and set in a vertical direction, the casing further having a casing intake port in the lower face of the frame and a casing discharge port in a side portion of the frame; a centrifugal blower blade housed in the casing and having a blade intake port facing the casing intake port; and an electric motor which rotates the centrifugal blower blade, wherein the centrifugal blower blade is provided so that an upper side of an axial center thereof is tilted in a direction toward an upstream side of a centrifugal airflow based on a center line of the casing intake port in a direction orthogonal to the casing discharge port.

REFERENCES:
patent: 3201032 (1965-08-01), Gelbard
patent: 6711015 (2004-03-01), Syring et al.
patent: 61-60039 (1986-04-01), None
patent: 3-72245 (1991-07-01), None
patent: 9-26179 (1997-01-01), None
patent: 2003-065581 (2003-03-01), None
International Search Report of PCT Application No. PCT/JP2010/001783, dated on Jun. 15, 2010.

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