| 摘要 |
PURPOSE: A condensing pressure control system is provided to increase cooling capacity by lowering the condensing pressure of a refrigerating system and increasing subcooling of a refrigerant around an expansion side. CONSTITUTION: A refrigerating system comprises a variable condensing pressure control system. The refrigerating system comprises a compressor(1), a condenser(2), an expansion valve(3), and an evaporator(4). The compressor compresses the refrigerant gas under high pressure. The condenser condenses the compressed refrigerant into liquid. The expansion valve expands a liquid refrigerant under of high pressure and temperature to be liquid refrigerant of low pressure and temperature.
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