Abstract: A refrigeration defrost system includes a frosted evaporator with an evaporator refrigerant vapor line and an evaporator refrigerant liquid line. A compressor with a suction inlet and a discharge outlet are both connected to a discharge manifold. The discharge outlet is connected to the evaporator refrigerant vapor line. A pressure regulator valve is located in a refrigerant bypass passageway between the discharge manifold and the suction inlet line and feeds refrigerant vapor, when a defrost cycle is required, from the discharge manifold into the suction inlet. A check valve is connected in series with the regulator valve to stop low pressure refrigerant vapor from the evaporator refrigerant vapor line from feeding into the suction inlet. The refrigerant vapor is fed from the compressor into the discharge outlet and into the evaporator through the evaporator refrigerant vapor line, which defrosts the evaporator.

Abstract: A method for circulating the air contained within an enclosure so as to reduce the vertical air temperature stratification. The method includes the steps of positioning a piece of furniture within the enclosure so as to create an air circulating conduit. The piece of furniture is positioned so as to form at least part of the air circulating conduit. The air circulating conduit defines a circulating conduit inlet positioned adjacent a first initial air temperature level and a circulating conduit outlet positioned adjacent a second initial air temperature level. The method also involves inducing a flow of air in the circulating conduit so as to force the air adjacent the first initial air temperature level to flow into the conduit inlet and to be discharged at the conduit outlet. An air circulating device is also proposed. The air circulating device includes a piece of furniture having a furniture spacing component for spacing the furniture bottom wall from the floor.