Coil and refrigeration system containing coil

The invention relates to a coil and a refrigeration system containing the coil, and belongs to the technical field of refrigeration. The coil includes an outer tube and two inner tubes with which theinside of the outer tube is sleeved, single-medium refrigerants are led into the inner tubes, and the single-medium refrigerants in the different inner tubes are different in boiling points and incompatible with each other. A mixed refrigerant is led into the outer tube and refers to a gas phase mixture of the single-medium refrigerants in the inner tubes. The outer tube and the inner tubes are integrated into a whole in a sleeving mode, since the inner tubes and the outer tube contain the different refrigerants, the cleaness of the inner wall of the tubes can be ensured, dust such as sand particles left in the tubes is prevented from affecting the refrigeration effect at the time of refrigeration, the refrigeration efficiency can be improved, the refrigeration time can be shortened, the cost of the refrigeration