SAFE DEVICE FOR AIR CONDITIONER REFRIGERANT INJECTION SYSTEM, PARTICULARLY CONCERNED WITH PREVENTING DAMAGE OF REFRIGERANT HOSE AND LEAKAGE OF REFRIGERANT GAS BY SAFELY STOPPING AIR CONDITIONER REFRIGERANT INJECTION SYSTEM

摘要

PURPOSE: A safe device for an air conditioner refrigerant injection system is provided to prevent damage of a refrigerant hose and leakage of refrigerant gas by safely stopping an air conditioner refrigerant injection system by detecting abnormality of synchronous driving. CONSTITUTION: A cylinder unit(20) is mounted at a front end of a hose fixing bar guiding and fixing a refrigerant hose(7) at one side of an air conditioner refrigerant injector, and is connected with the refrigerant hose through a working rod(23) for stroking a piston dog(25). A dog detector is mounted at one side of the cylinder unit for detecting the piston dog and outputting a signal to a controller. A pneumatic line(47) is formed inside the cylinder unit for supplying an air pressure from an air supply source through a pneumatic hose(45) to correspond to tension of the refrigerant hose.