PURPOSE: To reduce significantly a content of a refrigerant gas accompanying non-condensing gases and diffusing to the atmosphere, decrease economical loss and prevent pollution caused by the refrigerant by improving technique of bleeding the non-condensing gases entrained in the refrigerant gas in a refrigerating machine.
CONSTITUTION: A mixture gas caught by a separator 4 is conducted to a rectifier 9 without being discharged to the atmosphere through a discharge unit, and is caused to come in contact with a cooling pipe 9a which is supplied with a low temperature fluid 10a from a cold source 10. The mixture gas is a non- condensing gas which contains a little amount of refrigerant gas, and the contained refrigerant gas is contacted with the cooling pipe 9a to be liquefied and collected. Thus the non-condensing gas, from which the contained refrigerant gas has been removed, is discharged to the atmosphere through a discharge unit 9c.
ISHII SUSUMU
KUMAKI MICHIO
GENBA TAKEO
TERASAKI MASATOSHI
HITACHI LTD