Patent ID: 9211777
Filing Date: 2015-12-15
Classification: B60H

Abstract:
1. A vehicle air-conditioning apparatus, installed in a vehicle, having a function for automatically stopping an engine when an automatic stop condition is met, and for restarting the engine when a vehicle restart condition is met, the air-conditioning apparatus comprising: a blower fan for sending air-conditioning air for temperature control to a vehicle compartment; a heat exchanger for heating the air-conditioning air by heat exchanging with cooling water for the engine; a temperature control unit for executing temperature regulation control in the vehicle compartment by regulating a heat exchange rate of the air-conditioning air between the heat exchanger and the air-conditioning air; an interior air flow path to draw, as air-conditioning air, interior air from inside of the vehicle compartment; an ambient air flow path to draw, as air-conditioning air, ambient air from outside of the vehicle compartment; and a flow path switching unit for selecting a flow path by switching between the ambient air flow path or the interior air flow path; wherein an air volume map is selected in response to the flow path selected by the flow path switching unit when the engine is automatically stopped when the automatic stop condition is met; a temperature detection unit for detecting temperature of the air-conditioning air drawn through the interior air flow path or the ambient air flow path before heating the air-conditioning air by the heat exchanger; and an air volume control unit for determining, on heating, when the engine is automatically stopped when the automatic stop condition is met, an air volume from the air volume map selected in response to the flow path selected by the flow path switching unit, and with the air volume determined in response to the air-conditioning air temperature detected by the temperature detection unit such that the determined air volume is reduced as the air-conditioning air temperature drops, and for controlling driving of the blower fan so as to supply air at the determined air volume.