DRAINAGE PUMP

Japanese Patent JP3580329

B2

PROBLEM TO BE SOLVED: To smooth a flow of bubbles, smoothly deliver drain water, and reduce noise of a drainage pump by forming a rotary blade out of a plurality of flat plate- shaped large diametric blades extended in a diametric direction from the periphery of a shaft part and out of a flat plate-shaped small diametric blade or the like continued to a lower edge part of the large diametric blade.
SOLUTION: A rotary blade 50 is formed out of a small diametric blade 54 comprising a plurality of flat plates protruded in a diametric direction with the center axis of a shaft part 52 serving as the center and a flat plate-shaped large diametric blade 60 extended radially to the outward from a peripheral part of the shaft part 52, and these blades are successively provided through a tapered annular member 62. An auxiliary blade 68 is provided between the large diametric blades 60, thus a head of a pump is increased. Further, the large diametric blade 60 and a peripheral end of the auxiliary blade 68 are connected by a cylinder wall member 64, and its height is formed lower than the height dimension of the large diametric blade 60 and an upper end part of the auxiliary blade 68. In this way, bubbles generated in a liquid in the periphery of the large diametric blade 60 are allowed to smoothly flow in a delivery port, and collision of the bubbles against a cover bottom surface is relaxed.

JP7403792	drain pump
JP2005233192	DRAIN PUMP AND AIR CONDITIONING SYSTEM EQUIPPED THEREWITH

Takashi Endo
Tatsushi Ninomiya
Masayuki Imai

JP22025095A

October 20, 2004

August 29, 1995

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Fuji Koki Co., Ltd.

F04D1/14; F04D11/00; F04D29/22; F04D29/24; F04D29/66; (IPC1-7): F04D11/00

Patent Business Corporation Daiichi International Patent Office
Yoshiaki Numagata
Takio Sumiyoshi
Yasue Numagata

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