Introduction to Key Points of Compressor Grouping in Quick-freezing Cold Storage

The compressor industry is a technology-intensive industry with relatively complex production processes and high requirements for machining precision. Correspondingly, the difficulty of product and technology updates has also increased. The sustainable development of enterprises requires not only certain research and development capabilities and quick-freezing cold storage technologies but also the accumulation of certain practical experience.

① Select the compressor according to the heat load of the quick-freezing cold storage room to balance the refrigerating capacity of the operating compressor with the heat load.

② When the compression ratio between the condensing pressure and the evaporating pressure is greater than 8 for the ammonia system and greater than 10 for the Freon system, two-stage compression should be adopted.

For other compressors like screw compressors, there is no such requirement.

③ Try to make each compressor responsible for one evaporation temperature as much as possible. In actual operation, it is also allowed to combine the systems of -28 °C to -33 °C into one evaporation temperature, because the difference between the two evaporation temperatures is not large.

When the load of the -28 °C system is relatively small, it can be connected to form an evaporation system for the quick-freezing cold storage.

④ Although the evaporation temperatures among ice making, ice storage and quick-freezing cold storage are close to each other, it is best to use separate compressors for cooling to avoid mutual influence when the load changes.

⑤ When the two-stage compressor is put into operation, the capacities of the high-pressure and low-pressure compressors should be selected according to the management measures for quick-freezing cold storage.