Refrigeration circulation and control method thereof

Abstract

The present invention relates to a freezing-circulation process and its control method. Said invention includes comprssor, condenser, expansion decompression device, evaporator and splitter device. The compressor can compress the cooling medium into high-temp. high-pressure gas cooling medium, the condenser can condense the above-mentioned gas cooling medium into medium-temp. high-pressure liquid cooling medium, and the expansion decompressino device can decompress the above-mentioned liquid cooling medium into low-temp. low-pressure liquid cooling medium, the evaporator can evaporate the liquid cooling medium into low-temp. low-pressure gas cooling medium, and the splitter device can be used for making high-pressure side cooling medium flow toward low-pressure side when high-pressure side pressure is excessively raised.

Description

technical field [0001] The present invention relates to refrigeration cycles, and more particularly to methods of control. Background technique [0002] The general refrigeration cycle is that when the working fluid passes through the compressor, condenser, expansion valve and evaporator, the heat in the low-temperature part is moved to the high-temperature part to perform refrigeration or heating; the refrigeration cycle is suitable for air conditioners, refrigerators, etc. [0003] Such as figure 1 As shown, the refrigeration cycle in the prior art includes the following structures: a compressor (2), a condenser (4), an expansion valve (6) and an evaporator (8). [0004] The compressor (2) is used to compress the refrigerant; the condenser (4) performs heat exchange between the high-temperature and high-pressure compressed gas refrigerant formed in the compressor (2) and the outdoor air to condense the gas refrigerant; the expansion valve (6) is used to The medium-temper...

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Problems solved by technology

[0012] That is to say, when the temperature of the outdoor air is relatively high, although the refrigerating cycle can be operated by using the pressure regulating valve arranged on the compressor, the overload generated on the compressor can be temporarily prevented. The high-temperature and high-pressure gas refrigerant is discharged to the low-pressure part, which increases the pressure and temperature of the low-pressure part, resulting in an overall increase in the pressure and temperature of the refrigerant in the refrigerating cycle, so there will inevitably be a problem of reducing refrigeration efficiency.

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