Heat pumps for simultaneous cooling and heating

Claim 1

A HEAT PUMP FOR COOLING INDOOR AIR IN A PORTION OF A BUILIDING AND SIMULTANEOUSLY HEATING INDOOR AIR IN ANOTHER PORTION OF THE BUILDING, COMPRISING A REFRIGERANT COMPRESSOR; A CONDENSER FOR HEATING FLUID FOR SUPPLY TO LOCAL AIR HEATING UNITS, AND HAVING ITS REFRIGERANT INLET CONNECTED TO THE DISCHARGE SIDE OF SAID COMPRESSOR; AN EVAPORATOR FOR CHILLING FLUID FOR SUPPLY TO LOCAL AIR COOLING UNITS, AND HAVING ITS REFRIGERANT INLET CONNECTED TO THE REFRIGERANT OUTLET OF SAID CONDENSER; A SURGE DRUM HAVING A GAS OUTLET CONNECTED TO THE SUCTION SIDE OF SAID COMPRESSOR, AND HAVING A GAS AND UNEVAPORATED LIQUID INLET CONNECTED TO THE REFRIGERANT OUTLET OF SAID EVAPORATOR; A PUMP HAVING AN INLET CONNECTED TO RECEIVE LIQUID REFRIGERANT FROM SAID DRUM, AND HAVING AN OUTLET CONNECTED TO SAID INLET OF SAID EVAPORATOR; A HEAT SINK EXCHANGER, AND HAVING ONE SIDE CONNECTED TO SAID INLET OF SAID EVAPORATOR AND TO SAID OUTLET OF SAID PUMP; REVERSAL VALVE MEANS CONNECTED TO SAID DISCHARGE SIDE OF SAID COMPRESSOR, TO THE OTHER SIDE OF SAID HEAT EXCHANGER, AND TO SAID INLET OF SAID DRUM; MEANS WHEN THE COOLING LOAD IS GREATER THAN THE HEATING LOAD FOR ADJUSTING SAID VALVE MEANS TO ROUTE GAS FROM SAID DISCHARGE SIDE OF SAID COMPRESSOR TO SAID OTHER SIDE OF SAID HEAT EXCHANGER, AND FOR ROUTING LIQUID FROM SAID PUMP TO SAID INLET OF SAID EVAPORATOR; AND MEANS WHEN THE HEATING LOAD IS GREATER THAN THE COOLING LOAD FOR ROUTING LIQUID FROM SAID PUMP TO SAID ONE SIDE OF SAID HEAT EXCHANGER, AND FOR ADJUSTING SAID VALVE MEANS TO ROUTE GAS AND UNEVAPORATED LIQUID FROM SAID OTHER SIDE OF SAID HEAT EXCHANGER TO SAID INLET OF SAID DRUM.