PUMP DEVICE AND PUMP SYSTEM

WIPO Patent Application WO/2013/051290

A1

A pump device (1A) is provided with the following: an impeller (2) which rotates around a rotational axis (A); an inflow passage (10a) which extends along the rotational axis (A) of the impeller (2); a vortex chamber (10b) provided around the impeller (2); a high pressure chamber (4) provided around the inflow passage (10a); a peripheral wall (5) which separates the inflow passage (10a) and the high pressure chamber (4); and a bypass passage (6) which communicates the vortex chamber (10b) and the high pressure chamber (4). A plurality of through holes (51) are provided in the peripheral wall (5) in the circumferential direction. The center axis (B) of the through holes (51) is included in a plane substantially perpendicular to the rotational axis (A). The center axis (B) is inclined with respect to a reference line (L). The direction of inclination of the center axis (B) with respect to the reference line (L) is set so that the opening (51q) of the through holes (51) on the inflow passage side is positioned further downstream in the rotating direction of the impeller (2) than the opening (51p) on the high pressure chamber (4) side.

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KAWANO BUNKI
KOMORI KOU
TAMURA TOMOICHIRO

PCT/JP2012/006448

April 11, 2013

October 05, 2012

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PANASONIC CORP (JP)

F04D29/42; F04D15/00; F04D29/46

JPH07174098A	1995-07-11
JP2010174806A	2010-08-12
JP2011085095A	2011-04-28
JP2003314496A	2003-11-06
JP2008309029A	2008-12-25

KAMADA, Koichi et al. (JP)
Koichi Kamata (JP)

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