PURPOSE: To prevent the temperature at the top surface of a cabinet from rising by a structure wherein a space between the cabinet and a body is employed as a suction passage.

CONSTITUTION: A body 16 having suction ports 14 and 15 is arranged in a cabinet 13, on the upper and lower parts in the front surface of which a louver 11 and punched holes are provided respectively. At the same time, a partition plate 19 is arranged between the suction ports 14 and 15 on the body 16. The suction ports 14 such cold air, which enters the cabinet 13 through the punched holes, while the suction ports 15 suck both the cold airs, one of which enters the cabinet 13 through the punched holes and the other of which enters the cabinet 13 through the louver 11. Because the cold air sucked in the suction ports 15 passes between the top plate of the cabinet 13 and the top plate of the body 16 after passing through the louver 11, the heat in the top plate of the body 16 does not transmit to the top plate of the cabinet 13 and consequently no bad influence is given to a rubber gas pipe and the like, even if a portable cooking stove or the like is placed on the cabinet 13.