Patent ID: 8133005

Claim:
A blower, comprising: a single housing having a plurality of flange portions; a first impeller and a second impeller disposed in the single housing, wherein a mutual air-gathering passage is formed between the first and second impellers and the single housing, wherein airflow outputs of the first and second impellers are interlinked in the mutual air-gathering passage, at least one of the first and second impellers has a plurality of blades, and end terminals of the flange portions are above the blades; a plurality of motors, wherein each of the impellers is driven by a corresponding one of the motors, and the impellers are located on a same surface of the single housing; and a blocking member disposed in the housing and between the first and second impellers, wherein an end terminal of the blocking member is not connected to a side wall of the housing so as to form a passage therebetween so that a part of the airflow from first impeller flows toward the second impeller.