Patent ID: 8316838

Claim:
A cooking device comprising: a cavity providing a cooking chamber; and a burner provided at the cooking chamber in the cavity, the burner heating food in the cooking chamber, wherein the burner includes: a supply part where a gaseous fuel mixed with air flows; and a combustion unit connected to the supply part to receive the mixed gaseous fuel and to burn the received mixed gaseous fuel flowing within the combustion unit, wherein the combustion unit has a single loop shape, wherein the combustion unit further comprises an inner part provided with a plurality of flame holes for generating flames and an outer part provided with a plurality of flame holes for generating flames, at least one of the inner part and the outer part comprises: an upper case; a lower case coupled to the upper case; and a plurality of gaps disposed between at least two adjacent flame holes, the plurality of gaps being configured to transfer a flame between the two adjacent flame holes, at least a portion of the lower case being spaced apart from the upper case to form the plurality of gaps, wherein the flame holes of the inner part comprise a first flame hole tilted from a normal line to the inner part, and a second flame hole normal to the inner part.