Patent ID: 7686009

Claim:
An oven comprising: a cooking chamber disposed in a housing; a door to open and close the cooking chamber, the door having first and second air channels, which are separated from each other; a circulating fan in the housing outside the cooking chamber; and a channel connecting unit to connect a discharge part of the circulating fan to the first air channel and to connect a suction part of the circulating fan to the second air channel, wherein the first air channel has one end connected to the discharge part of the circulating fan via the channel connecting unit and the other end connected to an outer space communicating with the lower end of the door, to guide air discharged by the circulating fan to the lower end of the door such that the air is discharged out of the oven through the lower end of the door, and the second air channel has one end connected to the suction part of the circulating fan via the channel connecting unit and the other end connected to the outer space communicating with the lower end of the door, to guide air suctioned by the circulating fan from the lower end to the upper end of the door such that the door is cooled by the air, so that when the circulating fan operates, outside air is suctioned into the suction part of the circulating fan through the second air channel to cool the door, and then discharged from the discharge part of the circulating fan to the outside space of the oven through the first air channel and the lower end of the door.