PURPOSE: Heated water is sprayed into a cyclone and the exhausted gas is forcibly sent from the heating cabinet into the cyclone, thus permitting cooked food to be stored at an appropriate temperature without damage to quality, taste and appearance.

CONSTITUTION: Heated water is sprayed into cyclone 8 and the gas exhausted from the heating cabinet 1 is forcibly sent into the cyclone by means of fan F to effect heat exchange. The resultant hot and humid gas containing fine particles of water is sent through pipe 4 into the cabinet to warm or heat the food product stored inside and prevent the food product from losing its moisture. Mircoorganisms are removed in the cyclone.