VEHICLE AIR-CONDITIONING DEVICE

摘要

When the operation mode of a heat pump device (20) is a first heating operation mode that uses two in-cabin heat exchangers (31, 32), in the case that a cabin exterior heat exchanger (33) has been detected to have frost, a second heating operation mode that uses one in-cabin heat exchanger (31) is switched to, and then a defrosting operation mode is switched to.