| 摘要 |
PROBLEM TO BE SOLVED: To circulate mixed air between a gas mixing chamber and a chamber and disposing a humidifier in the chamber. SOLUTION: The respective gaseous components from a CO2 gas cylinder 3, N2 gas cylinder 4 and other gas cylinders 5 are introduced into a gas mixing chamber 2 via a solenoid valve 31 for CO2 , a solenoid valve 41 for N2 and other solenoid valves 51 and are mixed uniformly by a mixed air stirring fan 21. The mixed air in the gas mixing chamber 2 is delivered through a forward pipeline 2a toward the chamber 1 by an air pump 6, heated by a heater 7, removed of impurities by an air filter 8 and supplied into the chamber 1. When the mixed air is fed into the chamber 1 through the forward pipeline 2a, the mixed air which already exists in the chamber 1 is refluxed through a backward pipeline 2b into the gas mixing chamber 2. As a result, the mixed air is circulated between the gas mixing chamber 2 and the chamber 1. Furthermore, the mixed air is humidified by the humidifier 11 in the chamber 1, by which high humidity is obtained.
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