Wide-working-condition annual refrigeration type evaporative cooling magnetic suspension refrigerating unit and control method

Abstract

The invention relates to a wide-working-condition annual refrigeration type evaporative cooling magnetic suspension refrigerating unit and a control method. The wide-working-condition annual refrigeration type evaporative cooling magnetic suspension refrigerating unit comprises a plurality of direct-expansion coils, the output ends of the plurality of direct-expansion coils are integrated into a pipeline through a plurality of pipelines and then connected with the inlet end of a vapor-liquid separator, an air outlet and an auxiliary air port of the vapor-liquid separator communicate with an air suction port and an air supplement port of a magnetic suspension compressor through the pipelines respectively, an exhaust port of the magnetic suspension compressor is connected with the inlet endof an evaporative cooling type condenser through the pipelines, the outlet end of the evaporative cooling type condenser is connected with the inlet end of a liquid storage tank through the pipelines,the outlet end of the liquid storage tank is connected with the inlet end of a dry filter, and the outlet end of the dry filter is connected with a liquid spraying connector of the magnetic suspension compressor and the inlet ends of the direct-expansion coils through the pipelines correspondingly. According to the wide-working-condition annual refrigeration type evaporative cooling magnetic suspension refrigerating unit and the control method, the evaporation temperature range of the unit can be adjusted within -5 DEG C to 18 DEG C, the requirement for multi-working-condition changes can bemet, the magnetic suspension compressor reduces mechanical friction of moving parts by utilizing the magnetic suspension technology, and the service life of the unit is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and air-conditioning equipment, and in particular relates to a year-round cooling evaporative cooling magnetic levitation refrigeration unit under wide working conditions and a control method. Background technique [0002] With the development of our country's economy, and the continuous acceleration of the industrialization process. The requirements for refrigeration and air-conditioning equipment in various industries are also constantly improving, and the existing equipment can no longer meet higher standards and energy-saving requirements. In the existing magnetic levitation refrigeration units, the cooling methods are mostly water-cooled or air-cooled, and the cooling efficiency is lower than that of evaporative cooling. , and when the evaporation temperature is low, the chilled water needs to increase the antifreeze. When the cooling method adopts water cooling, and when the ambient ...

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Problems solved by technology

[0004] In view of the limited range of evaporation temperature adjustment of existing refrigeration and air-conditioning equipment, it cannot meet the requirements of large temperature and load changes in some fields. Refrigeration at low ambient temperatures requires consideration of antifreeze and high energy consumption.

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