| 摘要 |
An air pump includes a housing, a motor, an impeller and an air flow controller. The housing confines a receiving space, and has a first end portion formed with a first port unit, an opposite second end portion formed with a second port unit, and an intermediate portion between the first and second end portions and formed with a third port unit. The motor is mounted in the receiving space. The impeller is coupled to and driven rotatably by the motor, and includes a base plate and first and second blade sets provided respectively on opposite sides of the base plate. The first and second blade sets face toward the first and second port units, respectively. The air flow controller is mounted on the second end portion of the housing, and is operable so as to block selectively fluid communication between the second port unit and the receiving space.
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