| 摘要 |
A rinser has a partial-vacuum chamber that constantly communicates with a partial-vacuum line during the rinsing process. The partial-vacuum chamber is separated from the operating space by a diaphragm with an aperture. A spring forces the diaphragm into a position in which is closes off an air inlet into the operating space. Inside the operating space is a float with a shift rod that has a seal at the top that closes off the aperture in the diaphragm as the float rises, interrupting the communication between the operating space and the partial-vacuum line. The breakdown of partial vacuum in the operating space produces a differential pressure on diaphragm, which lifts and releases the air inlet. The seal does not release from the diaphragm until it is forced against a thrust pin loaded by another diaphragm that communicates with the partial-vacuum chamber through one aperture and with the atmosphere through another aperture. The forces exerted on the first diaphragm allow large cross-sections to the atmosphere and to the partial-vacuum line opened and closed, even with a float that, because it carries out only a control function, can be very small.
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