Refrigeration system including high pressure limit control means

Claim 1

A REFRIGERATION SYSTEM COMPRISING A COMPRESSOR, A CONDENSER, A NORMAL FLOW CONTROL MEANS AND AN EVAPORATOR CONNECTED IN CLOSED REFRIGERANT CIRCUIT, AN ELECTRIC MOTOR FOR DRIVING SAID COMPRESSOR, A SUPPLY CIRCUIT FOR ENERGIZING SAID MOTOR INCLUDING A MOTOR OVERLOAD PROTECTOR FOR OPENING SAID SUPPLY CIRCUIT UPON A SUBSTANTIAL INCREASE IN THE LOAD ON SAID MOTOR, A BYPASS INCLUDING A NORMALLY CLOSED VALVE MEANS BYPASSING SAID FLOW CONTROL MEANS, SAID VALVE MEANS OPENING UPON AN ABNORMAL INCREASE IN THE DIFFERENTIAL BETWEEN THE REFRIGERANT PRESSURES IN SAID CONDENSER AND SAID EVAPORATOR TO INCREASE SUBSTANTIALLY THE FLOW OF REFRIGERANT TO SAID COMPRESSOR AND THEREBY LOAD SAID MOTOR AND CAUSE SAID OVERLOAD PROTECTOR TO OPEN SAID SUPPLY CIRCUIT, SAID VALVE MEANS CONSTITUTING THE SOLE MEANS FOR LIMITING ABNORMAL PRESSURE CONDITIONS IN SAID CONDENSER.