VEHICULAR AIR-CONDITIONING DEVICE, AND CONSTITUENT UNITS OF SAME

摘要

A vehicular air-conditioning device includes a first water refrigerant heat exchanger and a second water refrigerant heat exchanger. The first water refrigerant heat exchanger evaporates refrigerant by exchanging heat between a low-temperature, low-pressure refrigerant and heat-transporting coolant. The second water refrigerant heat exchanger condenses the refrigerant by exchanging heat between a high-temperature, high-pressure refrigerant and the coolant. The coolant is circulated in the order of one of the first water refrigerant heat exchanger and the second water refrigerant heat exchanger, the other of the first water refrigerant heat exchanger and the second water refrigerant heat exchanger, a passageway for cooling a heat-generating component of a vehicle, and a heater core for heating air blown into the cabin. In this configuration, sufficient amount of heat can be fed to the coolant by the other of the first water refrigerant heat exchanger and the second water refrigerant heat exchanger, whereby heating performance can be increased.