Title:
【発明の名称】送風機用遷移ダクト
Document Type and Number:
Japanese Patent JP2795701
Kind Code:
B2
Abstract:
The present invention provides a curvilinear transition duct (10) for use with a centrifugal fan (40) that affords optimal fan efficiency without undue duct length. The duct comprises a top section (12) of generally concave planar shape when viewed from above and a bottom section (14). Side sections join the top and bottom sections to form a four sided structure having an inlet opening (20) at one side and an outlet opening at the other side (22). The top plate (12) is arranged to have a positive angle of expansion (DT) whilst the bottom plate (14) may be arranged to have a zero angle of expansion or a positive angle of expansion (DB) less than that of the top plate (12) such that the duct gradually diverges in the same direction as fan housing scroll development.
Inventors:
BURAJIMIIRU KAPURAN
RICHAADO ETSUCHI HARISON
RICHAADO ETSUCHI HARISON
Application Number:
JP26637789A
Publication Date:
September 10, 1998
Filing Date:
October 18, 1989
Export Citation:
Assignee:
BORUCHIMOA EAKOIRU CO INC
International Classes:
F04D29/44; B01D47/00; F04D7/08; F04D29/00; F04D29/42; F04D29/46; F15D1/02; F16L25/00; F24F5/00; F24F13/02; F25D17/00; F28C1/02; F28F25/00; F28F25/12; E04F; F04D; F24F; (IPC1-7): F04D29/44
Domestic Patent References:
| JP6146498A |
Attorney, Agent or Firm:
Keiichi Shimizu