| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device which detects air mixed into a medium passage of the device using a medium which is lower in boiling point than water, and automatically removes the mixed air. <P>SOLUTION: The device comprises: an eductor using a liquid medium cooled by a cooler as a drive medium; a first vessel; a pressure gauge which measures the pressure of an air phase part of a passage of a mixed gas; and a temperature gauge which measures a temperature of the passage of the mixed gas. The device also comprises a control part which calculates a pressure threshold obtained by totaling a saturation vapor pressure value of the medium and an excess value which are calculated on the basis of a temperature of the temperature gauge and a pressure value of the pressure gauge, detects that the air is mixed into the medium when the pressure value of the pressure gauge is larger than the pressure threshold, takes the mixed gas out of the passage of the mixed gas by using the eductor by operating the cooler and a pump and transfers it to the first vessel, and performs control for returning the liquid medium which is separated into air and liquid by the first vessel to the passage of the mixed gas via a first valve. <P>COPYRIGHT: (C)2013,JPO&INPIT |
