Pump
The present disclosure relates to a pump. The pump of the present disclosure includes: 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 includes: a first plate having a disk shape; a boss extending vertically from a center of the first plate, and coupled to a rotating shaft of the pump motor; a plurality of blades extending from an outer circumferential surface of the boss in a radial direction of the first plate; and a second plate having a surface parallel to the first plate, spaced apart from the first plate by a predetermined distance, and connected to the plurality of blades.
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.
2. The pump of claim 1 , wherein the plurality of blades have a shape projecting from a circumferential surface of the boss, and project radially outwardly from an outer circumference of the first plate.
3. The pump of claim 1 , wherein:
the plurality of blades are disposed perpendicular to the first plate; and
the respective blades have a bent shape.
4. The pump of claim 1 , wherein an inclination angle between the plurality of blades and a tangent line of the circumferential surface of the boss is greater than an inclination angle between the plurality of blades and a tangent line of an outer circumference of the second plate.
5. The pump of claim 1 , wherein the respective blades have an inner blade coming into contact with the first plate, an outer blade coming into contact with the second plate, and a connection blade disposed between the inner blade and the outer blade.
6. The pump of claim 5 , wherein:
a length of the inner blade in the radial direction is greater than a length of the outer blade in the radial direction; and
the length of the outer blade in the radial direction is greater than a length in the radial direction of the connection blade.
7. The pump of claim 1 , wherein the second plate has a ring-shaped inner side which is open at top and bottom; and
each of an upper surface and a lower surface of the second plate is connected to each of the plurality of blades.
8. The pump of claim 1 , wherein the second plate is spaced apart radially outwardly from the outer circumference of the first plate; and
wherein the second plate is spaced apart from the first plate in a direction in which the boss projects from the first plate.
9. The pump of claim 1 , wherein the second plate is spaced apart radially outwardly from the first plate by a length one-third to one-half of the width in the radial direction of the second plate.
10. The pump of claim 1 , wherein the second plate is spaced apart from the first plate by a length one-third to one-half of a height of the plurality of blades vertically projecting from the first plate.