2 934 911 by micai and kramer solenoid 20 is always open during refrigeration the high pressure refrigerant vapor is condensed to a liquid by transferring its heat to air drawn over condenser 28 by fan 32 which is driven by motor 34 the cooled condensed liquid flows from the condenser coil 28 to its outlet fitting 36 through check valve 40 and then into receiver 44 where it collects as a pool 46 when the refrigerant is required to be used it is withdrawn through dip tube 48 and flows through liquid line 50 to the high pressure liquid inlet fitting 106 of accumulator 96 from this fitting the liquid refrigerant flows through tubes 108 which are within the suction accumulator and leaves via outlet fitting 110 to a continuation of liquid line 50 which serves to deliver the cooled liquid through liquid solenoid 52 and into expansion valve 54 which is under the control of bulb 55 strapped to suction line 76 and connected to the expansion valve by capillary tube 57 the expansion valve 54 serves to reduce the pressure and the temperature of the liquid refrigerant flowing therethrough to approximately the evaporating temperature of the system at this temperature the liquid refrigerant withdraws heat from the air drawn over the coil by fan 64 driven by motor 66 and the liquid refrigerant is boiled away to a vapor the vapor traverses suction line 76 enters suction accumulator 96 via its inlet tube 100 and leaves the suction accumulator via outlet connection 98 having during its passage therethrough partially cooled the liquid refrigerant flowing in heat exchange relation.