Patent ID: 6021644
Filing Date: 2000-02-08
Classification: F24F,F25B

Abstract:
A dehumidification apparatus employing a reverse cycle compression type refrigeration system having an evaporator coil and a condenser coil, the coils being connected to exchangeably perform their functions, the apparatus including fan means for providing an airstream, the coils both being positioned in the airstream, the airstream having a first velocity through the evaporator coil, the evaporator air velocity being affected by frosting, and a second velocity through the condenser coil; means for defrosting the evaporator requiring defrosting including means for reversing the refrigeration cycle, thereby causing the frosted evaporator to function as a condenser and the condenser as an evaporator, and means for initiating defrosting including means for observing a characteristic of the air velocity through the frosting coil, means for observing a characteristic of the air velocity through the other coil, and means for comparing the two characteristics.