Multiple temperature refrigerator

Claim 1

A HOUSEHOLD REFRIGERATOR COMPRISING A FRESH FOOD COMPARTMENT OPERATED AT ABOVE-FREEZING TEMPERATURES, A FREEZER COMPARTMENT OPERATED AT BELOW-FREEZING TEMPERATURES, MEANS FOR REFRIGERATING SAID COMPARTMENTS COMPRISING AN EVAPORATOR UNIT INCLUDING A HOUSING HAVING FRONT, REAR, TOP AND BOTTOM WALLS, A PARTITION WITHIN SAID HOUSING DIVIDING SAID HOUSING INTO FIRST AND SECOND CHAMBERS, SAID PARTITION HAVING A BOTTOM PORTION THEREOF SPACED FROM THE BOTTOM WALL OF SAID HOUSING TO FORM A PASSAGE CONNECTING SAID CHAMBERS, AN EVAPORATOR COMPRISING A FIRST SECTION DISPOSED IN THE LOWER PORTION OF SAID FIRST CHAMBER AND A SECOND SECTION DISPOSED IN THE LOWER PORTION OF SAID SECOND CHAMBER, BOTH OF SAID SECTIONS INCLUDING VERTICAL FINS SUBSTANTIALLY BRIDGING THE SPACE BETWEEN THE FRONT AND REAR HOUSING WALLS WITH THE FINS ON SAID FIRST SECTION SPACED A GREATER DISTANCE FROM ONE ANOTHER THAN THE FINS ON SAID SECOND SECTION, SAID SECTIONS BEING SPACED FROM THE TOP WALL OF SAID HOUSING TO PROVIDE A SPACE IN THE UPPER PORTION OF EACH CHAMBER BETWEEN THE EVAPORATOR SECTION CONTAINED THEREIN AND THE TOP WALL OF SAID HOUSING, MEANS FOR WITHDRAWING COOLED AIR FROM THE UPPER PORTION OF SAID SECOND CHAMBER AND CONDUCTING SEPARATE AIR STREAMS TO SAID FRESH FOOD AND FREEZER COMPARTMENTS, A FIRST AIR RETURN MEANS CONNECTING SAID FRESH FOOD COMPARTMENT ONLY WITH THE UPPER PORTION OF SAID FIRST CHAMBER AND A SECOND AIR RETURN MEANS CONNECTING SAID FREEZER COMPARTMENT WITH THE LOWER PORTION OF SAID SECOND CHAMBER WHEREBY THE AIR STREAMS RETURNING FROM THE FREEZER AND FRESH FOOD COMPARTMENTS ARE KEPT SEPARATE UNTIL AFTER THE MOISTURE CONTENT OF THE AIR STREAM RETURNING FROM THE FRESH FOOD COMPARTMENT IS SUBSTANTIALLY LOWERED BY CONTACT WITH SAID FIRST EVAPORATOR SECTION.