Double-tube isolation type beverage cooler unit

The invention discloses a double-tube isolation type beverage cooler unit. The double-tube isolation type beverage cooler unit comprises a refrigeration compressor, a condenser, an isolation flooded evaporator and a safety medium circulating pump, wherein the refrigeration compressor, the condenser and the isolation flooded evaporator are sequentially connected, and the isolation flooded evaporator is connected with the refrigeration compressor. The double-tube isolation type beverage cooler unit is characterized in that the isolation flooded evaporator comprises an outer evaporator tube, an inner evaporator tube, a beverage inlet tube, a beverage outlet tube, a first safety medium circulating barrel, a second safety medium circulating barrel, a first beverage circulating barrel, a second beverage circulating barrel and a third beverage circulating barrel. the isolation heat transfer mode in which three mediums are adopted is adopted in the isolation flooded evaporator and is namely refrigeration medium and intermediate safety medium heat transfer and intermediate safety medium and beverage heat transfer, safety performance is high, a multilevel water pump system is not needed, and therefore running power consumption cost and input cost of equipment are reduced.