| 摘要 |
PURPOSE:To heighten a suction pressure by sucking air through an air-flow- passage consisting of two nozzle portions, a straight pipe portion and an enlargement portion and generating negative pressure and sucking air through the 2nd air-flow-passage which opens at a cave portion. CONSTITUTION:The 1st air current, with the air-sucking-operation of an exhaust, flows through an air-flow-passage consisting of a suction opening 201, nozzles 202, 203, a straight pipe portion 204 and an enlargement portion 205. Suction force occurs at the 2nd air-flow-passage 207 due to negative pressure generated inside a cave portion 206, and the 2nd air current occurs. Accordingly, a remarkably height suction pressure than the sucking pressure of the exhaust blower itself can be obtained.
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