| 摘要 |
A vacuum breaking device includes a housing, a sealing base, a floating cup and a sealing ring. The housing has a liquid inlet, a liquid outlet and an air passageway. The sealing base is installed in the air passageway, and the floating cup is installed in an inner chamber of the sealing base. The sealing ring is fitted around an upper end of the floating cup for properly sealing the outer-air inlet in the upper portion of the sealing base and communicating with the inner chamber. The floating cup has an annular flange for increasing the buoyancy of the floating cup, so that the outer-air inlet may be quickly sealed up. The annular flange has plural air paths, so the vacuum condition may be broken immediately when a vacuum pressure is produced in the device.
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