COOLING METHOD AND APPARATUS Russian patent published in 2016 - IPC F25B1/10 F25B9/00 

FIELD: home appliances.

SUBSTANCE: invention relates to refrigerating unit. Plant for cooling of same physical unit by means of single refrigerator/cooler or several coolers/liquefiers arranged in parallel. Refrigerator(s)/liquefier(s) uses working gas of same nature, having low molar mass, i.e. having average value of total molar mass less than 10 g/mol, such as pure gaseous helium. Each refrigerator/liquefier contains compressor station for compression of working gas, refrigerating chamber intended for cooling of working gas at outlet of compressor station, wherein working gas, cooled by each of corresponding refrigerators/liquefiers refrigerating chambers comes in heat exchange with physical unit in order to release coolant to latter. All compressor stations of the refrigerator(s)/liquefier(s) form single compressor station, providing for compression of working gas for each of corresponding separate refrigerators/liquefiers refrigerating chambers. Compressor station comprises compressor machine with lubricated screw type and system for removing oil from working fluid medium leaving compressor machines. Compressor station comprises plurality of compressor machines, which generate several pressure levels for working fluid medium, wherein transition from one level to further higher pressure level is achieved by means of one or more compressor machines, located in series, or by means of compressor machines, arranged in parallel. Compressor station comprises two compressor machines, creating two pressure levels, rising above level of fluid pressure at inlet of compressor station, wherein two main compressor machines, first and second compressor machines are arranged in series and created at its appropriate outlet fluid medium pressure levels, respectively referred to as "low" and "high". Other additional compressor machine is fed at inlet of fluid medium leaving refrigerating chambers under so-called "average" pressure level, which is intermediate between low and high levels. Additional compressor machine also creates "high" pressure level fluid medium at its output, wherein average pressure level is higher than pressure level at inlet to main compressor machines.

EFFECT: invention objective is cooling plant, which is less expensive, more compact and efficient.

7 cl, 4 dwg