| 摘要 |
The refrigeration appts. (10) includes a fill of a fluid refrigerant. A compressor (11) has an input shaft, an inlet and an outlet. A motor (12) has its drive shaft coupled to the input shaft. A condenser (13) exhausts heat from the refrigerant to convert the compressed vapour to liquid. The condenser includes a sump for accumulating the liquid. A turbine expander (19) has an inlet supplied by the sump with the fluid at the elevated pressure as a combination of liquid and vapour for expanding the refrigerant fluid to the reduced pressure. The turbine includes an output shaft coupled to the compressor input shaft, for recovering at least a part of the compression energy. An evaporator (21) is situated in circuit between the expander outlet and the compressor inlet. A bypass conduit, connected between the condenser and the evaporator, includes a valve for selectively permitting the fluid to flow from the condenser to the evaporator. The valve is actuated by a sensor which detects an accumulation of the liquid in the condenser. |
