Title:
BLOWER
Document Type and Number:
WIPO Patent Application WO/2018/061555
Kind Code:
A1
Abstract:
Provided is a blower with which a reduction in blowing performance can be prevented even when clothing or the like clings to a suction opening of a blower fan. In this portable blower, which has a fan guard 40 attached to the outside of a suction opening 30 formed in a side surface of a volute chamber 24 accommodating a blower fan 20, a concave section that is recessed from the outside toward the suction opening 30 and is arranged substantially concentrically with the blower fan 20 in the axial direction is formed in the fan guard 40, multiple first air holes 45–48 are formed on the inside of the concave section, and multiple second air holes 42 are formed on the outside of the concave section. Even if an obstructing object X adheres to the fan guard 40, air flows as in BA3 and BA4, and negative pressure in the indented area is dispersed, so the state of clinging can easily be eliminated.
Inventors:
ICHIHASHI NAOTO (JP)
Application Number:
PCT/JP2017/030547
Publication Date:
April 05, 2018
Filing Date:
August 25, 2017
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
F04D29/70; E01H1/08; F04D29/44
Foreign References:
| JPS61283795A | 1986-12-13 | |||
| JP2008002310A | 2008-01-10 | |||
| JPS6178243U | 1986-05-26 | |||
| JP2005163751A | 2005-06-23 | |||
| JP2001153099A | 2001-06-05 | |||
| JP2002155899A | 2002-05-31 | |||
| US20100086412A1 | 2010-04-08 |
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