To provide an electromagnetic pump device formed so that in a pump itself, an auxiliary accumulator and a filter are collected in one unit to be easily conveyed and further decreased in size and weight for integral formation, and prevented from a trouble due to water scale when used to feed water to a fuel cell.
An annular magnetic pole (24) having a magnetic gap between the end part of an electromagnetic plunger (15) and a face opposed to the end part is fitted in the one end portion of the two ends of a pillar cylinder (33) surrounded with an electromagnetic coil (20), and the other end portion is provided with an annular magnetic path (23). By a magnetic attraction force generated during on-period of a pulse current energized on the electromagnetic coil (20), the electromagnetic plunger (15) enters the inside of the annular magnetic pole (24) in an outgoing process to form a magnetic circuit in an overlapped state. An accumulator (3) storing a force on the discharge side of a pump to effect an incoming process during quenching of the magnetic attraction force by a bouncing force generated by compressing and flagging a return spring (16) is integrally situated. Further, its attraction side is surrounded by a filter frame (28) and this constitution collects together all of fitments and decreases size for integral formation. Especially, a material for suction and discharge valve elements (36, 38) and valve seats (37, 39) of a pump are designed in consideration as a feed of water to a fuel battery and a trouble such as sticking due to water scale is prevented from occurring.
CHIBA YASUTSUNE
TANABE KAZUICHI
Tsuneo Mihara
Okumura Yoshimichi
Blacksmith
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