公开(公告)号：EP3343042A1

公开(公告)日：2018-07-04

申请号：EP17210722.9

申请日：2017-12-27

申请人： Nidec Corporation

发明人： HAYAMITSU, Ryosuke ,  TAKAKI, Hitoshi ,  TATARA, Tatsuya

IPC分类号： F04D17/06 ,  F04D29/28 ,  F04D29/30 ,  F04D29/44 ,  F04D29/16 ,  F04D29/42

CPC分类号： F04D29/384 ,  A47L5/28 ,  A47L9/149 ,  A47L9/2857 ,  F04D17/06 ,  F04D25/06 ,  F04D25/082 ,  F04D29/165 ,  F04D29/281 ,  F04D29/30 ,  F04D29/4253 ,  F04D29/444 ,  F04D29/544

摘要： A fan device (1) includes an impeller (10) rotating around a central axis and a motor (20) disposed farther downward than the impeller (10). The impeller (10) includes a base unit (11) enlarged downward and plural blades (12) disposed on a peripheral surface of the base unit (11). Upper portions of the blades (12) are positioned at a leading end of a rotating direction with respect to lower portions. In an outer end portion on a front surface of each blade (12) at the leading end of the rotating direction, a radial-direction component of a normal unit vector of an upper end portion of the blade (12) is smaller than that of a lower end portion, assuming that an outer peripheral side of the blade (12) is a positive direction. A thickness of a root of the lower end portion is larger than that of the upper end portion.

公开(公告)号：EP3531538A1

公开(公告)日：2019-08-28

申请号：EP19158778.1

申请日：2019-02-22

申请人： Nidec Corporation

发明人： SHIOZAWA, Kazuhiko ,  NABESHI, Itaru ,  MORIYASU, Kenta ,  WATANABE, Yusuke ,  TAKAKI, Hitoshi ,  TATARA, Tatsuya ,  MIYOSHI, Kenta

IPC分类号： H02K1/27 ,  H02K1/28 ,  A47L9/22

摘要： A rotor assembly (5, 5B, 5C) includes: a shaft (51) disposed along a central axis (Ax) extending vertically; a tubular magnet (52, 52B, 52C) disposed on a radially outer surface of the shaft (51); a lower spacer (55, 55B) disposed axially below the magnet (52, 52B, 52C) and fixed to the radially outer surface of the shaft (51); and a tubular magnet holder (53) fixed to a radially outer surface of the magnet (52, 52B, 52C) via an adhesive (Ad). At least a part of an axially lower surface (531) of the magnet holder (53) is in contact with an axially upper surface (551) of the lower spacer (55, 55B).

公开(公告)号：EP3511575A1

公开(公告)日：2019-07-17

申请号：EP19150210.3

申请日：2019-01-03

申请人： Nidec Corporation

发明人： TATARA, Tatsuya ,  TAKAKI, Hitoshi ,  SHIOZAWA, Kazuhiko ,  HAYAMITSU, Ryosuke

IPC分类号： F04D17/06 ,  F04D25/06 ,  F04D29/10 ,  F04D29/28

摘要： An air blower includes: a motor (10) having a shaft (11); an impeller (20) fixed to the shaft; and a motor housing (30) disposed radially outwardly of the motor. The impeller includes an impeller base (21) that is more extended radially outwardly at an axially lower position. The impeller base includes a boss section (212) fixed to the shaft. The motor housing includes an upper surface cylindrical section (33) that extends axially upward from a radially inner end of the motor housing upper surface (31). At least part of a radially inner surface of the upper surface cylindrical section is radially opposed to a radially outer surface of the shaft or the boss section, and an axially upper end of the upper surface cylindrical section is disposed over an axially lower end of the impeller base and over an upper end of a bearing (Br1).