Patent ID: 6141979
Filing Date: 2000-11-07
Classification: F24F

Abstract:
A refrigeration system responsive to a thermodynamic demand of a comfort zone, comprising:a housing defining a supply air passageway adapted to convey supply air to said comfort zone and defining a return air passageway adapted to convey return air from said comfort zone;a first heat exchanger wheel extending into said supply air passageway and said return air passageway and being rotatable at a speed that varies to vary a first heat transfer rate between said supply air and said return air,a heat exchanger disposed within said supply air passageway and being adapted to cool said supply air by way of a fluid conveyed by said heat exchanger;a second heat exchanger wheel extending into said supply air passageway and said return air passageway and being rotatable at an upper speed to provide a second heat transfer rate between said supply air and said return air;a sensor responsive to said thermodynamic demand of said comfort zone;a transducer responsive to a thermodynamic variable associated with said heat exchanger; anda control that adjusts said speed of said first heat exchanger wheel in response to said transducer and turns said second heat exchanger wheel on and off in response to said sensor, whereby said second heat exchanger wheel rotates at said upper speed when said second heat exchanger wheel is turned on and is at rest when turned off.