Title:
給湯装置
Document Type and Number:
Japanese Patent JP5884844
Kind Code:
B2
Abstract:
A water heater capable of cooling a fan by inflow of air while suppressing backflow of combustion gas is provided. A fan includes: a fan case having a back surface wall; an impeller having a first blade and a second blade and housed in the fan case; a drive source rotating the impeller; and a rotation shaft coupling the impeller and the drive source through a through hole provided in the back surface wall. A gap through which air outside the fan case is suctioned into the fan case is provided between the rotation shaft and the back surface wall. The second blade faces the back surface wall without another member interposed therebetween throughout a range from an inner circumferential side to an outer circumferential side of the second plane.
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Inventors:
Shuji Kameyama
Yasutaka Kuriyama
Norihide Wada
Keigo Fukunishi
Karaki Tatsuya
Yasutaka Kuriyama
Norihide Wada
Keigo Fukunishi
Karaki Tatsuya
Application Number:
JP2014031857A
Publication Date:
March 15, 2016
Filing Date:
February 21, 2014
Export Citation:
Assignee:
Noritsu Co., Ltd.
International Classes:
F24H9/02; F04D29/28; F04D29/30; F04D29/58
Domestic Patent References:
| JP58069742U | ||||
| JP2009091935A | ||||
| JP2005023897A | ||||
| JP53140106U | ||||
| JP2003343484A | ||||
| JP2002156128A |
Foreign References:
| US5538395 |
Attorney, Agent or Firm:
Fukami patent office