Patent ID: 6792771
Filing Date: 2004-09-21
Classification: F24F,F25B

Abstract:
An air-conditioning apparatus which cools room air by an air cycle employing air as a refrigerant for performing air-cooling, comprising:a compressor (21) which draws in at least air in a room for compressing said drawn room air; cooling means (30) which subjects said compressed air compressed in said compressor (21) to heat exchange with exhaust air expelled from said room for cooling said compressed air; and an expansion device (23) which provides expansion of said compressed air cooled by said cooling means (30), wherein low-temperature air, cooled by said expansion in said expansion device (23), is delivered into said room; demoisturizing means (22) which has a separation membrane, said separation membrane being formed such that water vapor in the air is allowed to pass therethrough from a high partial pressure of water-vapor side to a low partial pressure of water-vapor side thereof, for separation of water vapor contained in said compressed air without causing said water vapor to undergo condensation; and depressurizing means (36) which provides depressurization of one of said sides of said separation membrane in said demoisturizing means (22) so as to ensure a difference in partial pressure of water-vapor between both said separation membrane sides.