Reverse cycle refrigeration system

Claim 1

IN A REVERSE CYCLE REGRIGERATION SYSTEM, THE COMBITION OF A COMPRESSOR, AN OUTDOOR COIL, AN INDOOR COIL, AND A REVERSING VALVE, EFFECTIVE WHEN IN A FIRST POSITION TO CONNECT THE INDOOR AND OUTDOOR COILS TO THE COMPRESSOR SUCTION AND DISCHARGE SIDES RESPRCTIVELY, AND WHEN IN A SECOND POSITION TO CONNECT THE INDOOR AND OUTDOOR COILS TO THE COMPRESSOR DISCHARGE AND SUCTION SIDES RESPECTIVELY, THE FIRST REFRIGERANT CONDUIT BETWEEN SAID INDOOR COIL AND SAID OUTDOOR COIL, SAID FIRST CONDUIT INCLUDING FIRST REFRIGERANT EXPANSION MEANS, A SECOND REFRIGERANT CONDUIT BETWEEN SAID INDOOR COIL AND SAID OUTDOOR COIL, SAID SECOND CONDUIT INCLUDING SECOND REFRIGERANT EXPANSION MEANS, MEANS FOR VARYING THE AMOUNT OF REFRIGERANT IN SAID SYSTEM IN RESPONSE TO SYSTEM OPERATING CONDITIONS INCLUDING A CLOSED VESSEL FOR STORING REFRIGERANT AND A CONDUIT CONNECTING SAID VESSEL WITH SAID FIRST CONDUIT AT A POINT BETWEEN SAID INDOOR COIL AND SAID FIRST EXPANSION MEANS, SAID OUTDOOR COIL COMPRISING A PLURALITY OF HEAT EXCHANGE TUBES PLACED IN AT LEAST TWO SUBSTANTIALLY PARALLEL ROWS, TUBES IN EACH OF SAID ROWS BEING INCLUDED IN SEPARATED CIRCUITS THROUGH SAID COIL, AND CROSSOVER MEANS SERIALLY CONNECTING TUBES IN ONE ROW WITH TUBES IN ANOTHER ROW TO FORM AT LEAST THREE REFRIGERANT PATHS EXTENDING THROUGHOUT THE LENGTH OF THE COIL.