CPC F04D 17/10 (2013.01) [F04D 25/06 (2013.01); F04D 29/2216 (2013.01); F04D 29/242 (2013.01); F04D 29/384 (2013.01); F04D 29/403 (2013.01); F04D 29/281 (2013.01); F04D 29/30 (2013.01); F05D 2210/11 (2013.01)] | 10 Claims |
1. A pump comprising:
a housing;
an impeller disposed in the housing and rotating to generate a flow of fluid; and
a pump motor configured to rotate the impeller,
wherein the impeller comprises:
a boss coupled to a rotating shaft of the pump motor;
a first plate extending radially from an upper end of the boss and having a disk shape;
a plurality of blades extending from an outer circumferential surface of the boss in a radial direction, a portion of an upper end of each of the plurality of blades being in contact with the first plate; and
a second plate having a surface parallel to the first plate, spaced downward from the first plate by a predetermined distance, and connected to the plurality of blades, and
wherein a width of the second plate in the radial direction is greater than a distance which the second plate is radially spaced from the first plate, and is less than a length of the first plate in the radial direction from the boss.
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