Patent ID: 9655987
Date: 2017-05-23
CPC Classifications: A61L,C01B

Claim:
1. A sterilization system, comprising: a plurality of spaces to be sterilized by a sterilization process; a gas supply source generating nitrogen dioxide gas to be used for the sterilization process; a piping system interposed between the gas supply source and the plurality of spaces to be sterilized; a plurality of valve devices disposed between the piping system and the plurality of spaces to be sterilized: a sensor detecting a concentration of the nitrogen dioxide gas in the plurality of spaces to be sterilized; and a control device configured to control the plurality of valve devices to successively perform a gas filling process to fill each of the plurality of spaces to be sterilized with the nitrogen dioxide gas, wherein the control device performs the gas filling process including: the control device repeats the same valve control to a next space to be sterilized as the valve control to the one space to be sterilized so as to perform a cycle of the gas filling process for filling each of the plurality of spaces to be sterilized with the nitrogen dioxide gas one by one, and when the concentration of the nitrogen dioxide gas in a space to be sterilized is detected by the sensor as being filled with nitrogen dioxide gas by reaching a predetermined level, the control device performs control such that in a next cycle of a gas filling process the space filled with nitrogen dioxide gas is excluded from the gas filling process.