Refrigeration and venetian blind means for controlling the entry of light and heat from a window or the like

Claim 1

IN A REFRIGERATION SYSTEM FOR CONDITIONING AN ENCLOSURE, A ROOM HAVING A WINDOW THEREIN, A HEAT-EXCHANGE AND LIGHT CONTROL UNIT POSITIONED WITHIN SAID ROOM PARALLEL TO AND ADJACENT SAID WINDOW AND ADAPTED TO PASS COLD LIQUID IN HEAT-EXCHANGE RELATIONSHIP WITH AIR ADJACENT THE WINDOW AND TO ABSORB RADIANT HEAT ENTERING THE WINDOW, SAID UNIT COMPRISING A RIGID TUBE ASSEMBLY COMPRISING A TOP HEADER AND A BOTTOM HEADER AND A PLURALITY OF VERTICAL HEAT-EXCHANGE TUBES MOUNTED AT THEIR RESPECTIVE ENDS IN SAID HEADERS TO PERMIT COLD LIQUID TO FLOW FROM ONE OF SAID HEADERS TO THE OTHER, SAID TUBES BEING POSITIONED IN A GENERAL PLANE PARALLEL TO SAID WINDOW, A PLURALITY OF LOUVERS CORRESPONDING IN NUMBER TO A NUMBER OF SAID HEAT-EXCHANGE TUBES AND MOUNTED RESPECTIVELY UPON SAID HEAT-EXCHANGE TUBES, EACH OF SAID LOUVERS HAVING A SLEEVE PORTION WHICH SNUGLY ENCLOSES ITS TUBE AND PROVIDES A HIGH RATE OF HEAT TRANSFER BETWEEN THE WALL OF THE TUBE AND THE LOUVER, EACH OF SAID LOUVERS ALSO INCLUDING A PAIR OF VANES PROJECTING TANGENTIALLY AND OPPOSITELY FROM THE LOUVER SLEEVE WITH EACH VANE BEING ADAPTED TO OVERLAP AND ENGAGE A VANE OF THE NEXT ADJACENT LOUVER, AND OPERATING MEANS TO SWING SAID LOUVERS AROUND THE RESPECTIVE AXES OF SAID HEAT-EXCHANGE TUBES.