Automotive heating and cooling system

Claim 1

A REVERSIBLE AIR CONDITIONING SYSTEM IN AN AUTOMOTIVE VEHICLE HAVING A PASSENGER CHAMBER AND A LIQUID COOLED ENGINE COMPRISING, A FIRST HEAT EXCHANGER MEANS INCLUDING A COIL HAVING FAN MEANS FOR CIRCULATING AIR IN SAID CHAMBER OVER THE COIL, A SECOND HEAT EXCHANGER MEANS INCLUDING A COIL ARRANGED TO HAVE COOLANT LIQUID FROM SAID ENGINE CIRCULATED THEREOVER, A COMPRESSOR, MEANS INCLUDING AN ELECTRICALLY ACTUATED MAGNETIC CLUTCH ARRANGED TO DRIVINGLY CONNECT SAID ENGINE TO SAID COMPRESSOR, MEANS INCLUDING AN ELECTRICALLY CONTROLLED FOUR-WAY VALVE CONNECTED TO SAID COMPRESSOR AND ARRANGED WHEN ENERGIZED TO SELECTIVELY CONNECT THE OUTPUT PRESSURE SIDE OF THE COMPRESSOR TO SAID SECOND HEAT EXCHANGER COIL AND THE INLET SUCTION SIDE OF THE COMPRESSOR TO THE FIRST OF SAID HEAT EXCHANGER COILS WHILE SELECTIVELY OPPOSITELY CONNECTING THE COMPRESSOR TO SAID HEAT EXCHANGER COILS IN THE OPPOSITE DEENERGIZED POSITION OF THE VALVE, A REFRIGERANT RECEIVER CONNECTED BETWEEN THE OPPOSITE SIDES OF SAID HEAT EXCHANGER COILS FROM SAID VALVE, MEANS INCLUDING A PAIR OF PRESSURE REDUCING VALVES CONNECTED IN SERIES ONE ON EACH SIDE OF SAID RECEIVER AND ARRANGED TO REDUCE THE PRESSURE OF REFRIGERANT PASSING FROM SAID RECEIVER TO SAID HEAT EXCHANGER COILS. MEANS INCLUDING OPPOSITELY OPENING CHECK VALVES BYPASSING SAID PRESSURE REDUCING VALVES AND OPENING FROM THE LOW PRESSURE SIDE TO THE HIGH PRESSURE SIDE OF THE REDUCING VALVES, A MAIN ELECTRICAL CIRCUIT CONNECTABLE TO ENGAGE SAID CLUTCH, SAID FAN MEANS AND SAID VALVE CONTROL, A LOW TEMPERATURE THERMOSTATIC SWITCH AND A HIGH TEMPERATURE THERMOSTATIC SWITCH CONNECTED IN SERIES WITH SAID CLUTCH ACROSS SAID CIRCUIT TO CONTROL THE OPERATION OF SAID CLUTCH, A MANUALLY OPERATIVE SWITCH BRIDGED ACROSS SAID LOW TEMPERATURE THERMOSTATIC SWITCH, A FAN ENERGIZING CIRCUIT INCLUDING SAID FAN MEANS AND A SERIES RESISTOR CONNECTED ACROSS SAID MAIN CIRCUIT, A SECOND MANUAL SWITCH GANGED WITH SAID FIRST MANUAL SWITCH AND BRIDGING SAID RESISTOR, AND A THIRD MANUAL SWITCH CONNECTED IN SERIES WITH SAID VALVE MEANS ACROSS SAID MAIN CIRCUIT TO CONTROL SAID VALVE AND ENGAGED WITH SAID FIRST MANUAL SWITCH, SAID REFRIGERANT SYSTEM BEING FILLED WITH A LOW PRESSURE REFRIGERANT, SAID THERMOSTATIC SWITCHES BEING ACTUATED IN RESPONSE TO TEMPERATURE AT THE ENDS OF SAID FIRST HEAT EXCHANGER COIL.