Refrigeration apparatus

Claim 1

REFRIGERATION APPARATUS COMPRISING: MEANS DEFINING A FIRST CHAMBER TO BE REFRIGERATED TO A FIRST TEMPERATURE; MEANS DEFINING A SECOND CHAMBER TO BE REFRIGERATED TO A SECOND TEMPERATURE LOWER THAN SAID FIRST TEMPERATURE; MEANS EXTERIORLY OF SAID CHAMBERS FOR REFRIGERATING AIR; AND MEANS FOR CIRCULATING AIR TO SAID CHAMBERS FOR REFRIGERATING THE SAME TO SAID TEMPERATURES INCLUDING (A) AIR TRANSLATING MEANS, (B) FIRST DUCT MEANS FOR DELIVERING AIR TO SAID TRANSLATING MEANS, (C) SECOND DUCT MEANS FOR DELIVERING AIR FROM SAID AIR TRANSLATING MEANS INTO HEAT EXCHANGE RELATIONSHIP WITH SAID REFRIGERATING MEANS AND TO SAID SECOND CHAMBER, (D) THIRD DUCT MEANS FOR DELIVERING AIR FROM SAID AIR TRANSLATING MEANS TO SAID FIRST CHAMBER, (E) FOURTH DUCT MEANS FOR DELIVERING AIR FROM SAID SECOND CHAMBER TO SAID FIRST DUCT MEANS, AND (F) FIFTH DUCT MEANS FOR DELIVERING AIR FROM SAID FIRST CHAMBER TO SAID FIRST DUCT MEANS TO BE ENTRAINED IN AND MIXED WITH THE AIR FROM SAID SECOND CHAMBER PRIOR TO CONTACT OF THE TRANSLATING MEANS BY THE AIR FROM SAID SECOND CHAMBER, WHEREBY REFRIGERATION OF SAID FIRST CHAMBER IS EFFECTED SUBSTANTIALLY SOLELY BY FLOW THERETHROUGH OF A RELATIVELY LARGE VOLUME MIXTURE OF REFRIGERATED AIR RECEIVED FROM SAID SECOND CHAMBER AND RECIRCULATED AIR RECEIVED FROM SAID FIRST CHAMBER WHICH IS PASSED TO SAID FIRST CHAMBER PRIOR TO HEAT TRANSFER ASSOCIATION WITH SAID AIR REFRIGERATING MEANS.