Air conditioning system

Claim 1

IN AN AIR CONDITIONING SYSTEM FOR USE IN BUILDINGS HAVING REFRIGERATED COMPARTMENTS, EQUIPMENT, AND THE LIKE THEREIN, SAID AIR CONDITIONING SYSTEM COMPRISING A CONDITIONER FOR THE AIR IN SAID BUILDING AND A BLOWER FOR DISCHARGING THE CONDITIONED AIR INTO SAID BUILDING, SAID REFRIGERATED COMPARTMENTS, EQUIPMENT, AND THE LIKE HAVING AT LEAST ONE REFRIGERATING UNIT EMBODYING A CONDENSER OPERABLE TO BE COOLED BY A LIQUID COOLANT, A LINE TO SUPPLY LIQUID COOLANT TO SAID UNIT, AND A LINE TO DISCHARGE THE HEATED COOLANT FROM SAID UNIT, THE IMPROVEMENT COMPRISING A NORMALLY-OPEN ENERGIZABLE VALVE IN SAID DISCHARGE LINE, A FIRST BRANCH LINE CONNECTED TO SAID DISCHARGE LINE INTERMEDIATE SAID REFRIGERATION UNIT AND SAID VALVE, A SECOND BRANCH LINE CONNECTED TO SAID SUPPLY LINE, A RECLAIMEDHEAT COIL IN SAID AIR CONDITIONING SYSTEM ADJACENT SAID BLOWER IN THE PATH OF THE AIR BEING DISCHARGED INTO THE BUILDING BY SAID BLOWER, SAID COIL BEING CONNECTED AT ONE END TO SAID FIRST BRANCH LINE AND CONNECTED AT THE OTHER END TO SAID SECOND BRANCH LINE TO FORM A LOOP INCLUDING SAID SUPPLY LINE, SAID REFRIGERATION UNIT, SAID DISCHARGE LINE, SAID FIRST BRANCH LINE, SAID COIL, AND SAID SECOND BRANCH LINE, ENERGIZABLE MEANS IN SAID LOOP OPERABLE WHEN ENERGIZED TO AFFORD FLOW THERETHROUGH AND OPERABLE WHEN DEENERGIZED TO PREVENT FLOW THROUGH SAID LOOP, A CONTROLLER OPERABLE TO SIMULTANEOUSLY ENERGIZE AND DE-ENERGIZE BOTH SAID ENERGIZABLE VALVE AND SAID ENERGIZABLE MEANS, AND A THEREMOSTAT RESPONSIVE TO THE TEMPERATURE OF THE COOLANT FLOWING THROUGH SAID LOOP DOWNSTREAM OF SAID COIL AND UPSTREAM OF SAID REFRIGERATION UNIT AND OPERATIVELY CONNECTED TO SAID CONTROLLER, SAID THERMOSTAT BEING OPERABLE TO INTERRUPT ENERGIZATION OF BOTH SAID ENERGIZABLE VALVE AND ENERGIZABLE MEANS TO THEREBY INTERRUPT FLOW OF COOLANT THROUGH SAID LOOP WHEN THE TEMPERATURE OF SAID COOLANT RISES ABOVE A PREDETERMINED SAFE LEVEL AND TO RE-ENERGIZE BOTH SAID ENERGIZABLE VALVE AND SAID ENERGIZABLE MEANS WHEN THE TEMPERATURE OF SAID COOLANT FALLS A SET AMOUNT BELOW SAID SAFE LEVEL.