Heat pump system

Claim 1

A HEATING AND COOLING APPARATUS COMPRISING A REFRIGERANT COMPRESSOR, A FLUID TEMPERATURE MODIFYING DEVICE, MEANS CONNECTED TO SAID COMPRESSOR FOR CIRCULATTING A REFRIGERANT THEREBETWEEN, AND MEANS FOR PASSING A FLUID WHOSE TEMPERATURE IS TO BE MODIFIED THROUGH SAME IN HEAT EXCHANGE RELATION THEREWITH, SAID DEVICE COMPRISING AT LEAST A FIRST SECTION AND A SECOND SECTION, THE LATTER OF WHICH IS DISPOSED UPSTREAM FROM SAID FIRST SECTION, THE FIRST SECTION COMPRISING A COMBINED EVAPORATORCONDENSER AND SAID SECOND SECTION COMPRISING LIQUID REFRIGERANT SUB-COOLING MEANS, A LIQUID REFRIGERANT RECEIVER CONNECTED INTERMEDIATE SAID FIRST AND SECOND SECTIONS AND INCLUDING MEANS FOR SEPARATING ANY GAS FROM THE LIQUID REFRIGERANT ENTERING SAME, SAID MEANS FOR CIRCULATING A REFRIGERANT COMPRISING A REFRIGERANT FLUID HEAT EXCHANGER CONNECTED INTERMEDIATE THE SUB-COOLING SECTION OF SAID TEMPERATUE MODIFYING DEVICE AND SAID COMPRESSOIR, AND A REFRIGERANT FLOW REVERSING VALVE CONNECTED INTERMEDIATE THE COMPRESSOR AND EACH OF SAID FIRST SECTION OF THE MODIFYING DEVICE AND SAID REFRIGERANT FLUID HEAT EXCHANGER.