Low temperature freezing system, in particular for freezing, deep freezing and storing of food products

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