[특허]Electric blower having improved return passage for discharged air flow

Electric blower having improved return passage for discharged air flow 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F04B-021/00 F04B-017/00 F04B-035/04
출원번호	US-0485056 (1990-02-26)
우선권정보	JP-0046553 (1989-03-01)
발명자 / 주소	Toyoshima Hisanori (Hitachi JPX) Jyoraku Fumio (Hitachi JPX) Ishii Yoshitaro (Hitachi JPX) Iwase Yukiji (Ushiku JPX) Sato Shigenori (Niihari JPX)
출원인 / 주소	Hitachi, Ltd. (Tokyo JPX 03)
인용정보	피인용 횟수 : 81 인용 특허 : 0

초록 ▼

An electric blower has an electric motor, a centrifugal impeller rotating by the driving of the electric motor, an end bracket for separating the electric motor from the centrifugal impeller, and a diffuser. The diffuser includes a plurality of diffuser vanes arranged near the outer periphery of the centrifugal impeller, and a flat plate portion which extends between the centrifugal impeller and the end bracket for supporting the diffuser vanes. The flat plate portion has a plurality of guide vanes formed on an opposite surface thereof from the diffuser vanes. A passage is defined by the end bracket, the flat plate portion and the guide vanes so as to return the air flow, discharged from the centrifugal impeller through the diffuser vanes, inwardly of the blower. The end bracket is formed in a substantially convex shape so as to extend away from the flat plate portion of the diffuser, with the end bracket extending from a central portion toward its periphery, thereby defining an opening area of the discharge air flow return passage. A sound absorbing material is arranged in the discharge air flow return passage to absorb sounds from the discharging air flow.

대표청구항 ▼

An electric blower comprising: an electric motor; a centrifugal impeller connected to a rotary shaft of said electric motor for rotation therewith; end bracket means for separating said electric motor from said centrifugal impeller; a diffuser including a flat plate portion extending between said centrifugal impeller and said end bracket means and a plurality of diffuser vanes formed on said flat plate portion near an outer periphery of said centrifugal impeller, said flat plate portion having a plurality of guide vanes formed on a surface of said flat plate portion opposite said diffuser vanes; a discharge air flow return passage defined by said end bracket means, said flat plate portion and said guide vanes for returning a discharging air flow from said centrifugal impeller inwardly of said blower; said end bracket means has a substantially convex shape so as to extend gradually away from said flat plate portion of said diffuser as said end bracket means extends from a central area thereof toward an outer periphery thereof and terminate in an annular flat plate portion disposed substantially parallel to said flat plate portion of said diffuser, thereby defining an opening area of said discharge air flow return passage; and a sound absorbing material arranged in said discharge air flow return passage and disposed on said annular flat plate portion of said end bracket means.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Electric blower having improved return passage for discharged air flow 원문보기

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Electric blower having improved return passage for discharged air flow 원문보기

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이 특허를 인용한 특허 (81)

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