| 摘要 |
PROBLEM TO BE SOLVED: To remove efficiently an excess water while superheat in a rotary room is prevented by removing a special operation for operating a defrosting function by a method wherein a humidity in the rotary room in which a rotor is contained is detected with a sensor, and an inside of the rotary room is controlled by heating or cooling according to the detected result. SOLUTION: When a rotor 1 in which a sample is contained is rotatively driven with a driving device 2, a temperature of the rotor 1 or an inside of a rotary room 3 containing that is detected with a temperature sensor 5 to control a heating and cooling device 9 with a controller 7 according to the result, and a water content is removed by evaporation. Further temperatures of the rotor 1 and the rotary room 3 are detected with a temperature sensor 6, and the heating and cooling device 9 is controlled so as not to exceed a limit value of a temperature to be raised of the rotor 1 according to the detected result. Further, when the rotary room 3 is heated, a pressure inside the rotary room 3 is reduced with a vacuum pump 4 to accelerate evaporation and removal of the water content. Then, after returning the rotary room to atmospheric pressure, when the water content remains, the evaporation and removal of the water content (a defrosting function) is performed again.
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