Refrigeration installation for freezing fresh products to - 45 degrees C, comprises combination of classic compressor, economizer and evaporator with piston type booster

摘要

In a first phase a classic circuit which has a axial compressor, closed economizer and matched evaporator is used to freeze a fresh product to -18 degrees C. When the temperature has been attained the evaporator is automatically connected to the low pressure circuit of a booster - 65/- 20 degrees C and the compressor and economizer serve as a high pressure booster stage