Refrigerator

A refrigerator comprising:

• a first compressor configured to compress a first refrigerant;
• a first condenser configured to condense the first refrigerant compressed by the first compressor;
• a first expansion valve configured to reduce a temperature and a pressure of the first refrigerant condensed by the first condenser;
• a first evaporator configured to evaporate the first refrigerant having passed through the first expansion valve, the first evaporator comprising a refrigerating compartment evaporator configured to exchange heat with first air inside of a refrigerating compartment of the refrigerator;
• a second compressor configured to compress a second refrigerant;
• a second condenser configured to condense the second refrigerant compressed by the second compressor;
• a second expansion valve configured to reduce a temperature and a pressure of the second refrigerant condensed by the second condenser;
• a second evaporator configured to evaporate the second refrigerant having passed through the second expansion valve, the second evaporator comprising a freezing compartment evaporator configured to exchange heat with second air inside of a freezing compartment of the refrigerator;
• a first fan configured to supply the first air having exchanged heat with the first evaporator to the refrigerating compartment;
• a second fan configured to supply the second air having exchanged heat with the second evaporator to the freezing compartment;
• and
• a heat exchanger arranged after and connected to the first expansion valve, the heat exchanger being arranged before and connected to the first evaporator,
• wherein the heat exchanger and the second condenser are configured to exchange heat with each other,
• wherein the first evaporator is configured to receive the first refrigerant from the heat exchanger, and
• wherein the freezing compartment is configured to receive cold air based on the first compressor, the second compressor, and the second fan being driven without the first fan being driven.