AIR CONDITIONING SYSTEM FOR VEHICLE MAINLY CONCERNED WITH PREVENTING DAMAGE OF COMPRESSOR DUE TO SHORTAGE OF COMPRESSOR OIL

摘要

PURPOSE: An air conditioning system for a vehicle is provided to prevent damage and break of a compressor due to shortage of compressor oil in reoperating an air conditioning system for a vehicle. CONSTITUTION: An oil back current preventing element(73) contains a first pipe(71) connected with a first evaporator and a compressor(10), and a second pipe(72) connected with a second evaporator(60). An aperture(71a) of the first pipe is placed lower than an aperture(72a) of the second pipe. When an air conditioning system for a vehicle is operated, a refrigerant and oil(100) are flowed into the second pipe through the second aperture at an upper part of the oil back current preventing element. The refrigerant and oil move downward by gravity, and flow into the first pipe through the aperture of the first pipe to supply the refrigerant and oil to the compressor.