| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality detecting device capable of easily detecting abnormality of an existing metal pipe by measuring an electric signal transmitted through the existing metal pipe. SOLUTION: A terminal 15 and a terminal 16 of the abnormality detection device 10 are respectively attached to a gas side refrigerant piping 25 and a liquid side refrigerant piping 26, the electric signal is transmitted between the terminals, and judgement of normal/abnormality is carried out by comparing a frequency characteristic of the electric signal with a stored frequency characteristic. COPYRIGHT: (C)2006,JPO&NCIPI |
