Drain pump and home appliance comprising same
A drain pump comprises a pump housing having a filtering cavity and an impeller cavity; a filter mounted in the pump housing and having a filter core; and a gap defined between the filter core and the pump housing to communicate the filtering cavity and the impeller cavity.
1. A drain pump comprising:
a pump housing having a filtering cavity and an impeller cavity;
a filter mounted in the pump housing and having a filter core; wherein the filter core comprises a filter housing being of an annular hollow cylinder, and a filter hole is defined in the filter housing; and
a gap defined between the filter housing and the pump housing to communicate the filtering cavity and the impeller cavity,
wherein an annular plate is disposed in the pump housing between the filtering cavity and the impeller cavity, the annular plate defines a through hole, one end of the filter core is accommodated in the through hole, and the gap is defined between the filter core and the annular plate.
2. The drain pump of claim 1 , wherein the filter core comprises a bent plate, the bent plate surrounds an outer circumferential surface of the filter housing, and the gap is formed between the bent plate and the annular plate.
3. The drain pump of claim 2 , wherein an outer circumferential surface of the bent plate is provided with a plurality of protruding posts abutting against an inner surface of the annular plate.
4. The drain pump of claim 2 , wherein a baffle extends radially from the filter core, and the baffle and the annular plate are opposed to each other.
5. The drain pump of claim 4 , wherein the annular plate forms an annular protrusion extending toward to the baffle, and the annular protrusion surrounds the through hole and is opposed to the baffle.
6. The drain pump of claim 5 , wherein an annular protruding block is arranged in the baffle to face the annular plate; the annular protruding block, the baffle and the bent plate together define an annular groove; the annular protrusion is aligned with the annular groove, and the filtering cavity, the impeller cavity, the gap, and the annular groove communicate with each other.
7. The drain pump of claim 2 , wherein the bent plate abuts against an inner surface of the annular plate, an inner surface of the bent plate defines a plurality of pressure relief grooves which form the gap, and the pressure relief grooves communicate the filtering cavity with the impeller cavity.
8. The drain pump of claim 7 , wherein the pressure relief grooves are circular arc-shaped, dovetail-shaped, or serrated grooves arranged circumferentially along the inner surface of the annular plate.
9. The drain pump of claim 2 , wherein the filter core further comprises a filter mesh connected with the filter housing, and the filter mesh is disposed in one end of the filter hole opposite from the impeller cavity.
10. The drain pump of claim 1 , wherein the filter further comprises a sealing member and a plurality of connecting members, the sealing member is connected to the filter core through the connecting members, the pump housing further comprises a sealing cavity disposed at one end of the filtering cavity opposite from the impeller cavity, and the sealing member is accommodated in the sealing cavity and connected with the pump housing.
11. The drain pump of claim 10 , wherein the sealing member connected with the pump housing via a thread engagement.
12. The drain pump of claim 1 , wherein the drain pump further comprises a motor assembly including a mounting housing and a motor, the motor is mounted in the mounting housing, the mounting housing is fixedly connected to the pump housing, one end of the motor is connected with an impeller, and the impeller is accommodated in the impeller cavity.
13. The drain pump of claim 12 , wherein the motor is a single phase brushless direct current motor, a three phase brushless direct current motor, or a single phase synchronous motor.
14. The drain pump of claim 1 , wherein an inlet pipe and an outlet pipe protrude from an outer circumferential surface of the pump housing, the inlet pipe defines an inlet passage in communication with the filtering cavity, and the outlet pipe defines an outlet passage in communication with the impeller cavity.
15. A home appliance comprising a drain pump, the drain pump comprising:
a pump housing having a filtering cavity and an impeller cavity;
a filter mounted in the pump housing and having a filter core; wherein the filter core comprises a filter housing being of an annular hollow cylinder, and a filter hole is defined in the filter housing; and
a gap defined between the filter housing and the pump housing to communicate the filtering cavity and the impeller cavity,
wherein an annular plate is disposed in the pump housing between the filtering cavity and the impeller cavity, the annular plate defines a through hole, one end of the filter core is accommodated in the through hole, and the gap is defined between the filter core and the annular plate.
16. The home appliance of claim 15 , wherein the home appliance is a washing machine or a dishwasher.
17. A drain pump comprising:
a pump housing having a filtering cavity and an impeller cavity;
a filter mounted in the pump housing and having a filter core; wherein the filter core comprises a filter housing and a bent plate, and a filter hole is defined in the filter housing, the bent plate surrounds an outer circumferential surface of the filter housing, an annular plate is disposed in the pump housing between the filtering cavity and the impeller cavity, the annular plate defines a through hole, one end of the filter core is accommodated in the through hole; and
a gap defined between the bent plate and the annular plate to communicate the filtering cavity and the impeller cavity; and wherein the bent plate abuts against an inner surface of the annular plate, an inner surface of the bent plate defines a plurality of pressure relief grooves which form the gap, and the pressure relief grooves communicate the filtering cavity with the impeller cavity.