| 摘要 |
<p>The invention relates to a cascade refrigerating system comprising a primary refrigerating system (4) operating with a first refrigerant, which primary refrigerating system (4) comprises compressor means, connected to condensing means, where the primary refrigerating system (4) further comprises heat exchanging means (2), where heat is exchanged from a secondary refrigerating system, which secondary refrigerating system comprises pumping means arranged to supply refrigerant to evaporating means (40) and the secondary refrigerating system comprises at least two pumping vessels (20,22) connected through respective check valves (12,14,28,30) which pumping vessels (20,22) are connected to at least one heat exchanger (67), in which refrigerant is evaporated to generate high pressure, which high pressure is led to the top of one of the pumping vessels (20,22) for supplying refrigerant with high pressure towards the evaporation means (40). The purpose of the invention is to provide an energy efficient refrigerating system that is suitable for refrigerant circulation with reduced energy consumption for circulating refrigerant in refrigerating systems.</p> |
