Patent ID: 8250875
Filing Date: 2012-08-28
Classification: F25B,F25D

Abstract:
1. An appliance comprising: a first refrigerated enclosure; a second refrigerated enclosure; a compression stage; a condensation stage; an evaporation stage comprising: a condensation stage bypass line positioned between an output of the compression stage and the second evaporator; a first valve in the condensation stage bypass line and being operative to allow a supply of refrigerant to bypass the condensation stage during a defrost mode; a line from the second evaporator to the compression stage; a second valve positioned in the line from the second evaporator to the compression stage and being operative to block a supply of refrigerant from the second evaporator to the compression stage during the defrost mode; an additional line positioned between the second evaporator and the first evaporator, the additional line carrying the supply of refrigerant from the second evaporator to the first evaporator in the defrost mode; and a third valve positioned in a line from the condensation stage to the evaporation stage, the third valve being operative to block a supply of refrigerant from the condensation stage to either the first evaporator, the second evaporator or both the first evaporator and the second evaporator, and wherein the third valve is operative to direct refrigerant from the second evaporator to the first evaporator during the defrost mode.