US Patent 9328951 Refrigerator

A refrigerator includes a main body with a first storage compartment; a first evaporation compartment provided within the main body in order to cool the first storage compartment; and a first evaporator provided in the first evaporation compartment. The refrigerator further includes a second storage compartment independently provided in the first storage compartment including a case forming an insulation space so as to maintain a temperature lower than the first storage compartment and a drawer to insert into and remove from the case; a second evaporation compartment, independent from the first evaporation compartment, formed in the second storage compartment; and a second evaporator provided in the second evaporation compartment.