Vehicle air conditioning device

Abstract

A vehicle air-conditioning apparatus includes a refrigerant circuit including a compressor, an indoor heat exchange unit, an air conditioning circuit including an external heat exchange unit, and a controller that controls the refrigerant circuit. The controller is feasible of selectively executing an outside air heat absorbing/heating operation in which heat is absorbed by the external heat exchange unit and a defrosting operation in which the external heat exchange unit is defrosted. The controller calculates travel time to a destination and an operation time of the outside air heat absorbing/heating operation until the outside air heat is not absorbed by the external heat exchange unit due to frosting. When the travel time is longer than the operation time, the controller executes the defrosting operation such that at least the operation time is equal to or longer than the travel time.

Dependencies are inferred from the claim text.