Precise refrigerating system

The utility model discloses a precise refrigerating system, which particularly relates to the technical field of refrigerating systems and comprises a compressor, an exhaust valve, a water-cooling condenser, a ball valve, a drying filter, a liquid viewing mirror, a main liquid path electromagnetic valve, a main liquid path expansion valve, an evaporator, a gas-liquid separator, an air suction filter and an air return valve which are sequentially connected to form a refrigerating loop. A hot air bypass pipeline is connected to the pipeline between the exhaust valve and the water cooling condenser, an adjustable exhaust bypass valve is installed on the hot air bypass pipeline, and a return air liquid spraying cooling bypass pipeline is connected to the pipeline between the liquid viewing mirror and the main liquid path electromagnetic valve. An air return and liquid spray electromagnetic valve and an air return and liquid spray expansion valve are sequentially installed on the air return and liquid spray coolin