| 摘要 |
PROBLEM TO BE SOLVED: To prevent a chemical fluid or washing water attached on a liquefied gas filling nozzle from freezing when filling and sealing a manufacturing line for an aseptic filling product is sterilizing-treated with the chemical fluid. SOLUTION: A method for washing and sterilizing a nozzle cover 18 surrounding a discharging nozzle 16 for discharging a low-temperature liquefied gas to an opening of a container 12 conveyed in an aseptic region 10, and whose bottom wall is equipped with an opening with such a size that passes a liquefied gas discharged from the discharging nozzle, a pipeline 22 for feeding the gas one end of which communicates with it and the other end of which communicates with a gas feeding source, the outer face of the nozzle cover of a low-temperature gas filling apparatus used in an aseptic filling method for a packaging container 12 and its surrounding part is provided. A method for preventing the fluid from invading into the nozzle cover comprises that the chemical fluid for sterilization or the washing water is sprayed on the outer face of the nozzle cover 18 and its surrounding part to jet pressurized gas in a sterilized dried state into the nozzle cover 18 from the pipeline 22 for feeding the gas, and the dynamic pressure blown out of the opening 20 of the nozzle cover 18 is made to be at least 0.9 kPa. COPYRIGHT: (C)2009,JPO&INPIT
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