DRAIN PUMP - PANASONIC ELEC WORKS CO LTD

Title:

DRAIN PUMP

Document Type and Number:

Japanese Patent JP2012017719

Kind Code:

A

Abstract:

To provide a drain pump with improved efficiency and reduced noise.

The drain pump includes a funnel-shaped housing 2 having a suction port at the lower end and a discharge port at an upper outer peripheral surface, and a rotary driven impeller 1 arranged in the housing. The impeller 1 includes a rotary shaft part 10 in the center of an inverted truncated conical cup 11. A plurality of blades 12 are installed between an inner peripheral surface of the cup and a rotary shaft part outer peripheral surface. The blades 12 are a swept wing shape of connecting its outer peripheral side over the total length in the axial direction of an inner surface of the inverted conical cup, and connecting the inner peripheral side only to the lower side of the rotary shaft part. An annular space 16 not partitioned by the blades is formed between an upper outer peripheral surface of the rotary shaft part and the upper inner periphery of the blades and the cup.

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Inventors:

KIMURA MASAKUNI

Application Number:

JP2010156868A

Publication Date:

January 26, 2012

Filing Date:

July 09, 2010

Export Citation: