Title:
VENTILATOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/058071
Kind Code:
A1
Abstract:
Provided is a ventilator device (1), comprising an air path (8) and a blower fan (17) which is positioned within the air path (8), and which is maintained at a prescribed set RPM by varying the duty ratio of drive voltage by PWM control, whereby airflow is blown by the blower fan (17) and circulated in the air path (8). The set RPM is changed on the basis of the duty ratio which varies according to airflow resistance of the air path (8) when the set RPM is reached, and the RPM of the blower fan (17) is maintained at the post-change set RPM.
Inventors:
FUJII KATSUSHI
Application Number:
PCT/JP2012/074619
Publication Date:
April 25, 2013
Filing Date:
September 26, 2012
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
F04D27/00; A61L9/22; B01D46/46; F24F1/0073; F24F1/0076; F24F6/00; F24F8/00; F24F8/125; H02P29/00; H02P29/02
Foreign References:
| JP2002165477A | 2002-06-07 | |||
| JP4625877B1 | 2011-02-02 | |||
| JP2006043005A | 2006-02-16 | |||
| JP2009017655A | 2009-01-22 | |||
| JP2009066466A | 2009-04-02 |
Attorney, Agent or Firm:
SANO SHIZUO (JP)
Shizuo Sano (JP)
Shizuo Sano (JP)
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