EP 4350151 A1 20240410 - PROPELLER FAN AND AIR CONDITIONER
Title (en)
PROPELLER FAN AND AIR CONDITIONER
Title (de)
PROPELLERLÜFTER UND KLIMAANLAGE
Title (fr)
VENTILATEUR À HÉLICE ET CLIMATISEUR
Publication
Application
Priority
JP 2021019737 W 20210525
Abstract (en)
Provided is a low-noise and high-efficiency propeller fan of which the thickness can be reduced. A propeller fan U1 includes a propeller (3) having a boss portion (33) and a plurality of blades (32), and a bell mouth (8) provided on the outer peripheral side of the propeller (3). A first position (a) closest to a suction side in a leading edge portion (32a) of each blade (32) is provided between a blade leading edge tip (321) and a blade leading edge root (323). A leading edge portion (32a) has, between the blade leading edge tip (321) and the first position (a), a recessed shape curved toward a blowing side. A trailing edge portion (32b) of each blade (32) has a raised shape curved toward the blowing side.
IPC 8 full level
F04D 29/38 (2006.01)
CPC (source: EP)
F04D 29/384 (2013.01); F05D 2240/303 (2013.01); F05D 2240/304 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4350151 A1 20240410; CN 116964333 A 20231027; JP WO2022249270 A1 20221201; WO 2022249270 A1 20221201
DOCDB simple family (application)
EP 21942926 A 20210525; CN 202180095228 A 20210525; JP 2021019737 W 20210525; JP 2023523751 A 20210525