| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem on a point of energy-saving that usage quantity of the driving steam in a first and a second steam ejectors 101 and 102 is remarkably large and that the power consumption for generating the driving steam and the power for driving a water sealing pump 109 are increased in the structure using the first and the second steam ejectors 101 and 102, an air ejector 108 and the water sealing pump 109 to evacuate inside of a system to the predetermined degree of vacuum. SOLUTION: This vacuum forming method is provided with a process for sucking the air inside a deodorizing system with a first and a second cold water ejector condensers 61 and 62 and for discharging the air to a hot well 60 after cooling it, and a process for sucking the residual air inside the first and the second cold water ejector condensers 61 and 62 with a third cold water ejector condenser 63 and for discharging it to the hot well 60 after cooling it.
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