Evaporative low-temperature refrigerating unit device and control method

Abstract

The embodiment of the invention provides an evaporative low-temperature refrigerating unit device and a control method, and relates to the technical field of refrigeration. The evaporative low-temperature refrigerating unit device comprises a compressor, an oil separator, an evaporative condensation mechanism, a liquid storage device, an indoor tail end mechanism and a gas-liquid separator. The compressor, the oil separator, the evaporative condensation mechanism, the liquid storage device, the indoor tail end mechanism and the gas-liquid separator are sequentially connected, and a refrigerant circulates in the compressor, the oil separator, the evaporative condensation mechanism, the liquid storage device, the indoor tail end mechanism and the gas-liquid separator; the indoor tail end mechanism comprises a plurality of cold air mechanisms, each cold air mechanism is connected with the liquid storage device and the gas-liquid separator, each cold air mechanism comprises a liquid pipe control valve, and the liquid pipe control valves are used for controlling circulation of refrigerants in the cold air mechanisms. The evaporative low-temperature refrigerating unit device can achieve the technical effects of reducing the occupied area of refrigerating equipment and reducing the manufacturing cost of a refrigerating system.

Description

technical field [0001] The present application relates to the technical field of refrigeration, and in particular, to an evaporative low-temperature refrigeration unit device and a control method. Background technique [0002] At present, a single system of a low-temperature refrigeration unit generally corresponds to multiple cold storages, but the opening time, frequency of use, and frost holding cycle of each cold storage are difficult to be inconsistent. When one of the cold storages needs to be frost-contained or reaches the temperature and stops, the refrigerant circulation at the end will be closed immediately. Due to the long installation distance at the end, the refrigerant will be stored in the pipeline, resulting in a sudden reduction in the refrigerant circulation volume of the entire system. While the compressor is still running at full load, it is easy to cause low pressure. Or when the compressor is turned on again, the refrigerant does not come back in time,...

AI Technical Summary

Problems solved by technology

When one of the cold storage needs to store frost or reach the temperature and shut down, the refrigerant circulation at the end will be closed immediately. Due to the long installation distance of the end, the refrigerant will exist in the pipeline, resulting in a sudden decrease in the refrigerant circulation of the entire system. While the compressor is still running at full load, it is easy to cause low pressure

Or when the compressor is turned on again, the refrigerant will not come back in time, and it is easy to cause low pressure

[0003] In the prior art, in order to solve the sudden fluctuation of the refrigerant, a large-capacity liquid receiver and gas separator are generally configured in the refrigeration system to cope with the sudden decrease of the refrigerant in the refrigeration cycle, and the large-capacity liquid receiver The air and gas components play a buffer role; however, configuring large-capacity liquid receivers and gas components in the refrigeration system not only increases the floor space of the unit, but also increases the manufacturing cost of the refrigeration system

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