Cooling system and method for operating a cooling system

Cooling system for cooling food on board an aircraft, comprising:

• a cooling circuit adapted to supply cooling energy to at least one cooling station, a refrigerant circulating in the cooling circuit being selected such that it is convertible at least partially from the liquid to the gaseous state of aggregation on releasing its cooling energy to the at least one cooling station and subsequently convertible back at least partially to the liquid state of aggregation again by an appropriate pressure and temperature control in the cooling circuit;
• and
• a refrigerant container which comprises a receiving space arranged in an interior space of the refrigerant container and intended for receiving the refrigerant circulating in the cooling circuit, the receiving space of the refrigerant container being connected to the cooling circuit by a flow line for discharging the refrigerant from the receiving space and by a return line for returning the refrigerant into the receiving space wherein there is arranged in the receiving space of the refrigerant container a heat exchanger allowing the passage of a further refrigerant therethrough and being adapted to remove heat from refrigerant received in the receiving space in the liquid and/or gaseous state of aggregation, in order to supercool the refrigerant and/or convert it to the liquid state of aggregation.