Refrigerated display cabinet and method of operation

Claim 1

IN THE METHOD OF REFRIGERATION OF A SPACE WHICH IS ENCLOSED EXCEPT FOR A SIDE HAVING AN ACCESS OPENING DIRECTLY COMMUNICATING THE INTERIOR OF THE SPACE WITH THE AMBIENT ATMOSPHERE, THE STEPS OF CIRCULATING INNER AND OUTER AIR PANELS IN SIDE-BY-SIDE, SUBSTANTIALLY PARALLEL RELATIONSHIP ACROSS THE OPEN SPACE FROM ONE EDGE OF THE OPEN SPACE TO THE OPPOSITE EDGE SUBSTANTIALLY COMPLETELY TO SPAN THE OPEN SPACE WITH THE FORMED AIR CURTAIN, SEPARATING THE AIR PANELS UPON REACHING THE OPPOSITE EDGE, RECIRCULATING THE SEPARATED AIR PANELS FROM THE OPPOSITE EDGE BACK TO THE ONE EDGE, PASSING THE RECIRCULATING INNER PANEL OF AIR IN HEAT EXCHANGE RELATIONSHIP WITH REFRIGERATION COILS THROUGH WHICH A REFRIGERANT IS CIRCULATED TO REDUCE THE TEMPERATURE OF THE AIR MAKING UP THE INNER PANEL TO A COLD AIR STREAM, PERIODICALLY BETWEEN RELATIVELY SHORT INTERVALS OF TIME STOPPING THE CIRCULATION OF THE AIR PANELS AND FOR A SHORT PERIOD OF TIME WHILE THE CIRCULATION OF THE AIR PANELS IS STOPPED, DEFROSTING THE REFRIGERATION COILS, AND PERIODICALLY BETWEEN RELATIVELY LONG INTERVALS OF TIME STOPPING THE CIRCULATION OF THE AIR PANELS AND FOR A RELATIVELY LONG PERIOD OF TIME DEFROSTING THE REFRIGERATION COILS.