VEHICULAR AIR CONDITIONER

摘要

PROBLEM TO BE SOLVED: To elevate a blowing temperature quickly even just after a heating operation start. SOLUTION: A four-way valve 5 is switched to circulate a refrigerant discharged from a compressor 6 through an indoor heat exchanger 2, a pressure control valve 8, an outdoor heat exchanger 7 and an accumulator 9 in this order. The passage is switched to a bypass passage B1 bypassing the outdoor heat exchanger 7 to develop heat exchange between the refrigerant and engine cooling water in a hot water heat exchanger 11.