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US 8,926,275 B2Granted
Centrifugal pump
AssigneeJohnson Electric S.A.
InventorsAwade Badafem, Min Li
Life of this patent
Estimating the term…
Abstract
A centrifugal pump includes an electric motor, an impeller driven by the motor and a pump housing having an impeller chamber, an inlet in communication with the impeller chamber via an opening, and first and second outlets in communication with the impeller chamber. The impeller chamber has an interference structure which forms first and second flow channels in communication with the first and second outlets. The interference structure directs the fluid in the impeller chamber to flow through the first outlet via the first flow channel when the impeller rotates in a first direction or to flow through the second outlet via the second flow channel when the impeller rotates in the opposite direction.
Claims18
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.
8 more elements
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 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, 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;
- wherein the first outlet is wider than the second outlet, the distance between the first interference plate and the opening between the inlet and the impeller chamber gradually increasing from the second flow channel to the first flow channel.
6 more elements
A centrifugal pump comprising:
- an electric motor;
- an impeller driven by the motor;
- a rotatable valve;
- and a pump housing,
- wherein:
- the pump housing has a top wall and a side wall forming an impeller chamber, an inlet outwardly extending from the top wall in an axial direction of the motor and in communication with the impeller chamber, a first outlet and a second outlet, a first outlet chamber formed between the first outlet and the impeller chamber and a second outlet chamber formed between the second outlet and the impeller chamber;
- the first outlet chamber is in communication with the first outlet and the second outlet chamber is in communication with the second outlet;
- a first opening is formed between the first output chamber and the impeller chamber and a second opening is formed between the second output chamber and the impeller chamber;
- and
- the valve is rotatably driven by fluid pressure to close the second opening when the impeller rotates in a first direction whereby the fluid in the impeller chamber flows through the first outlet via the first opening and the first outlet chamber and to close the first opening when the impeller rotates in a second direction whereby the fluid in the impeller chamber flows through the second outlet via the second opening and the second outlet chamber.
7 more elements
A centrifugal pump comprising:
- a first electric motor;
- an impeller driven by the first electric motor;
- and a pump housing having an impeller chamber, an inlet, a first outlet and a second outlet;
- a second electric motor;
- and a valve driven by the second electric motor to alternately communicate the first outlet and the second outlet with the impeller chamber, the valve having a rotational axis perpendicular to a rotational axis of the impeller.
2 more elements
Dependencies are inferred from the claim text.