Patent ID: 8926275
Filing Date: 2015-01-06
Classification: F04D,Y10S

Abstract:
1. A centrifugal pump comprising: an electric motor, an impeller driven by the motor; and a pump housing, wherein the pump housing has an impeller chamber, an inlet in communication with the impeller chamber via an opening, a first outlet and a second outlet, the first outlet and the second outlet being in communication with the impeller chamber at all times; an interference structure is arranged within the impeller chamber and forms a first flow channel in communication with the first outlet and a second flow channel in communication with the second outlet; and the interference structure is configured to direct fluid in the impeller chamber to flow through the first outlet via the first flow channel when the impeller rotates in a first direction and to direct fluid in the impeller chamber to flow through the second outlet via the second flow channel when the impeller rotates in a second direction; wherein the pump housing comprises a top wall and a side wall, the first outlet and the second outlet outwardly extend from the side wall and are arranged at one side of the impeller; wherein the interference structure comprises a first interference plate which is arranged at the same side of the impeller as the first outlet and the second outlet and partially surrounds the impeller; a second interference plate and a third interference plate which extend to the side wall from respective circumferential ends of the first interference plate, the second interference plate forming the first flow channel with the side wall and the third interference plate forming the second flow channel with the side wall; and a fourth interference plate partially surrounding the impeller at the side of the impeller remote from the first and second outlets; the fourth interference plate has two end portions extending to the side wall, one of the end portions forming an entrance of the first flow channel with the second interference plate and the other one forming an entrance of the second flow channel with the third interference plate.