PURPOSE: To facilitate cooling of food and drink or the like in an airplane with the use of the low atmospheric temperature by communicating a cold air chamber with a cooling chamber through an inflow duct and an outflow duct in rear part of a part of an outer panel of the airplane having no insulating layer, and incorporating a temperature control device and a cold air accumulator in the cooling chamber.

CONSTITUTION: A cold air chamber 13 is formed in a rear part of a part of an outer panel of an airplane, in which no insulating layer is laid, so as heat- exchange with outside air of the airplane. A cooling chamber 16 is arranged so as to be communicated with the cold air chamber 13 through an inflow duct 20 in the chamber 13 and an outflow duct 21 in the lower part of the chamber 13. Air volume regulating valves 22, 24 which are controlled by means of a thermostat 25 are provided in the inflow and outflow ducts 20, 21. Further, a cold air accumulator 27 is provided to the upper wall of the cooling chamber 16. With this arrangement, the air volume flowing through the inflow and outflow ducts 20, 21 is controlled, thereby the inside temperature of the cooling chamber 16 is steadily kept at a predetermined value in a range of -5 to +10 deg.C.