Patent ID: 8267165

Claim:
A vehicular air conditioning apparatus comprising: a casing having a plurality of passages through which air flows, cooling means for cooling air to supply cooled air, heating means for heating air to supply heated air, and a damper mechanism for switching flow of the air that flows through the passages, the cooling means, the heating means and the damper mechanism being disposed in an interior of the casing, wherein the vehicular air conditioning apparatus further comprises: a first passage disposed in the casing, the air flowing through the first passage; a first blower connected to the first passage, a blowing rate of the air blown from the first blower to the first passage being changeable; a second passage disposed in the casing separately from the first passage, the air flowing through the second passage; a second blower connected to the second passage and having a maximum capacity smaller than that of the first blower, a blowing rate of the air blown from the second blower to the second passage being changeable; and a controller for controlling driving of each of the first blower and the second blower, and wherein the controller controls the driving of each of the first blower and the second blower such that a total power consumed when the first and second blowers are driven simultaneously is less than a total power consumed when firstly the first blower is driven and then the second blower is driven, with respect to a desired air blowing amount, wherein the controller is configured to determine load voltages for the first blower and the second blower, respectively, based on power consumption characteristic curves of a fist blower fan and a second blower fan, the load voltages providing the desired air blowing amount and providing the lower total power consumed when the first and second blowers are driven simultaneously than the total power consumed when firstly the first blower is driven and then the second blower is driven.