Detecting leakage points in coolant circuit of refrigeration system - measuring pressure and temp. of vaporised coolant at suction side of compressor and comparing with stipulated value

摘要

A pressure sensor (15) and a temp. sensor (16) continuously, or at regular intervals, measure the vaporised coolant (suction gas) at the suction side of the compressor (11). The difference between the actual value of the suction gas pressure and temp. is compared with a stipulated value derived from the difference between pressure and temp. pertaining in an intact refrigeration installation. A significant deviation between the actual and stipulated values is interpreted as a leak condition. The warning appts. (14) contains an evaluating unit (17) and an optical and/or acoustic indicator (18). ADVANTAGE - Even small leaks can be detected in good time so that amt. leaked is kept small.