| 摘要 |
PROBLEM TO BE SOLVED: To downsize a pump having a switching valve for discharging liquid by executing selective switching from two discharge openings. SOLUTION: The pump 2 has the two discharge openings and is provided with: an impeller 4 capable of rotating forward and reversely and sucking water in the axial direction and discharging water in a radial direction; a pump chamber 6 for housing the impeller 4; a suction opening 10 for guiding the water from the outside to the inside of the pump chamber 6; a first and a second discharging openings 12, 14 for guiding the water in the pump chamber 6 to the outside of the pump chamber 6; and a switching valve 20 for switching whether the water passes through the first discharge opening 12 by opening or closing the first discharge opening 12. The switching valve 20 is disposed in an annular flow path 63 formed in a substantially annular shape between the impeller 4 and a pump chamber peripheral wall surface 71a facing the periphery of the impeller 4. COPYRIGHT: (C)2010,JPO&INPIT
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