METHOD FOR CLEANING PIPING OF AIR CONDITIONER

摘要

PROBLEM TO BE SOLVED: To provide a method for cleaning an air conditioner capable of obtaining a long-term reliability even by utilizing existing piping for the conditioner using an HFC refrigerant by realizing cleaning of the piping in a short time. SOLUTION: The method for cleaning the air conditioner comprises the steps of conveying an article from one piping port of inner and outer connecting piping of the conditioner via a compression gas and removing a foreign matter retained in the piping from another piping port. In this case, the method has a means for arbitrarily changing a pressure of the compression gas and a means for detecting that the article is discharged from the piping.