| 摘要 |
The invention relates to cooling systems and heat pumps with multi-stage cycles. An installation for production of heat or cold includes a pump, condenser and multiple evaporators, throttles, ejectors and separators of liquid refrigerating medium connected to each other. The installation is characterized by the number of separators of liquid refrigerating medium, throttles, ejectors and evaporators, and the circuits for connection of those elements. At that liquid phase in separators with higher pressure is used for pump-out of vapor from separators with lower pressure and condensed cold agent after condensers by means of ejectors. Multi-stage sequential expansion of vapor provides lower boiling pressure of refrigerating medium and effective extraction of energy from it. The inventions promote increase of efficiency of refrigeration cycles. |
