A centrifugal blower provided with a spiral shaped scroll chamber where a bottom part of the scroll chamber gradually expands downward in the axial direction of the fan well along with expansion of the spiral and where a flow area gradually expands toward an air outlet from a spiral start part of the casing, the centrifugal blower having an initial slant angle &thetas;0 at the spiral start part of the bottom part of the scroll chamber of a range of angle of 5.2° to 27.5° or setting a backflow prevention rib at the fan outlet.
申请公布号
US2012057971(A1)
申请公布日期
2012.03.08
申请号
US201113199400
申请日期
2011.08.29
申请人
MITSUISHI YASUSHI;SAKAI MASAHARU;YASUDA MASANORI;IMAHIGASHI SHOUICHI;ISHIGURO SYUNSUKE;DENSO CORPORATION;NIPPON SOKEN, INC.