| 摘要 |
A vehicular air conditioning device is provided with a coolant circuit (1) through which a coolant for cooling an in-vehicle heat source (4) flows and a refrigeration cycle circuit (3) that is used as a heat pump through which a refrigerant compressed by a compressor (2) flows. The coolant circuit (1) is provided with a burner (6) that heats the coolant, a radiator (7) that causes the heat of the coolant to be dissipated to the outside air, and a heater core (8) that performs heat exchange between the coolant and conditioned air that is blown into the vehicle. A control device (10) is provided with a calculation unit that calculates the fuel efficiency of each of the refrigeration cycle circuit (3) and the burner (6) and an efficiency selection unit that preferentially operates whichever of the heat pump and the burner (6) has higher fuel efficiency. In this way, the fact that there are cases in which the burner (6) has higher efficiency than the heat pump with respect to fuel consumption is put to practical use, and it is thus possible to provide a vehicular air conditioning device that has high efficiency with respect to fuel consumption. |
