Global Patent Index - EP 3591234 A1

EP 3591234 A1 20200108 - AIR BLOWER AND INDOOR UNIT OF AIR CONDITIONER

Title (en)

AIR BLOWER AND INDOOR UNIT OF AIR CONDITIONER

Title (de)

LUFTGEBLÄSE UND INNENRAUMEINHEIT EINER KLIMAANLAGE

Title (fr)

SOUFFLERIE D'AIR ET UNITÉ INTÉRIEURE DE CLIMATISEUR

Publication

EP 3591234 A1 20200108 (EN)

Application

EP 19164111 A 20190320

Priority

JP 2018058639 A 20180326

Abstract (en)

According to one embodiment, an air blower (3) comprises an impeller (5). The impeller (5) comprises a main plate (21) comprising a boss portion (21b) attached to an axis of rotation (4a) of a motor (4) and through-holes (21c) surrounding the boss portion (21b), a shroud (22) disposed opposite the main plate (21), and blades (23) which are formed of synthetic resin integrally with the main plate (21) between the main plate (21) and the shroud (22) and whose insides communicate with the through-holes (21c), the blades (23) including recesses (23f) recessed from the main plate (21) side to the shroud (22) side. The blades (23) have shapes twisted in an axial direction of the axis of rotation (4a) from the main plate (21) side to the shroud (22) side. An area extending from a leading edge portion (23a) to a thickest portion (23c) having a greatest thickness of an area extending from the leading edge portion (23a) to a trailing edge portion (23b) is inclined from a pressure surface (23d) to a suction surface (23e) as the area extends from the main plate (21) side to the shroud (22) side. The thickness of the thickest portion (23c) is set to 15% to 25% of a chord length (L4) between the leading edge portion (23a) and the trailing edge portion (23b) in an interface with the main plate (21).

IPC 8 full level

F04D 29/02 (2006.01); F04D 29/28 (2006.01); F04D 29/30 (2006.01)

CPC (source: EP)

F04D 29/023 (2013.01); F04D 29/282 (2013.01); F04D 29/30 (2013.01); F05D 2230/20 (2013.01); F05D 2230/30 (2013.01); F05D 2240/301 (2013.01); F05D 2250/291 (2013.01); F05D 2300/43 (2013.01); F05D 2300/44 (2013.01)

Citation (search report)

Citation (examination)

EP 1933040 A1 20080618 - MITSUBISHI ELECTRIC CORP [JP]

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

DOCDB simple family (publication)

EP 3591234 A1 20200108; JP 2019167939 A 20191003; JP 7467025 B2 20240415

DOCDB simple family (application)

EP 19164111 A 20190320; JP 2018058639 A 20180326