Title:
AIR COMPRESSOR
Document Type and Number:
Japanese Patent JP2015059503
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an air compressor capable of improving cooling performance of a motor.SOLUTION: An inner blade 105 of a cooling fan 8a applies a centrifugal system, and an outer blade 104 applies an axial flow system. The outside air is sucked from a ventilator window 29a by the outer blade 104, and air flow CA1 is generated. A part of the air flow generated by the outer blade 104 flows toward a stator coil 23 as air flow CA2. Further the air near the stator coil 23 is sucked by the inner blade 105 as air flow CA3 by a negative pressure P1 generated by the inner blade 105. The air sucked by the inner blade 105 flows to pass through toward a non-motor side opening 107 from a motor-side opening 106 by a negative pressure P2 generated by the outer blade 104, and is sucked by the outer blade 104 as air flow CA4 to flows out with the air flow CA1.
Inventors:
ICHIHASHI NAOTO
Application Number:
JP2013193502A
Publication Date:
March 30, 2015
Filing Date:
September 18, 2013
Export Citation:
Assignee:
HITACHI KOKI KK
International Classes:
F04B39/06; F04B39/00; F04B41/00
Domestic Patent References:
| JP2009185648A | 2009-08-20 | |||
| JP2004183498A | 2004-07-02 | |||
| JP2007177722A | 2007-07-12 |
Attorney, Agent or Firm:
Takashi Murai
Hiromi Murai
Hiromi Murai