| 摘要 |
A refrigeration system using CO2 as a refrigerant includes a receiver having a liquid outlet connected to expansion valves, which are connected to evaporators, which are connected to the suction side of the compressor. The receiver includes a second gas outlet connected to a second pressure reduction device, to reduce the energy consumption in CO2 cooling systems and to protect the compressors against liquid CO2 by heating the suction gas. The second pressure reduction device is connected by tubing to a first heat exchanging device, which is integrated in the receiver, so that gas that is evaporated in the top of a receiver can be used for cooling the liquid part of the same receiver. |
| 主权项 |
1. A refrigeration system primarily using CO2 as refrigerant, which refrigeration system comprises at least one first compressor, which compressor comprises a pressure outlet tube connected to at least one heat rejecting heat exchanger, which heat rejecting heat exchanger is connected to one first pressure reduction device and by tubing further connected to at least one receiver, which receiver comprises at least one first liquid outlet, which outlet is connected by tubing to one or more first pressure reduction devices, which first pressure reduction devices are connected to at least one first group of evaporators, which evaporators are connected by suction tubing to a suction side of the compressor, which receiver comprises at least one second gas outlet, which second outlet is connected by tubing configured to direct gas refrigerant within an upper portion of the receiver to a second pressure reduction device, wherein the second pressure reduction device is configured to expand the gas refrigerant to a lower temperature state and is connected by tubing configured to direct the expanded gas refrigerant from the second pressure reduction device to a first heat exchanging device, which first heat exchanging device is integrated in the upper portion of the receiver and transfers heat from the gas refrigerant within the upper portion of the receiver to the expanded gas refrigerant in the first heat exchanging device heating the expanded gas refrigerant in the first heat exchanging device and cooling the gas refrigerant within the upper portion of the receiver, which heated expanded gas refrigerant in the first heat exchanging device is directly connected to the suction side of the compressor, and which cooled gas refrigerant within the upper portion of the receiver absorbs heat from a liquid refrigerant in a lower portion of the receiver. |
