Patent ID: 8440948
Filing Date: 2013-05-14
Classification: A21B,F24C

Abstract:
1. A heating cooker of hot air circulation type comprising: a box-shaped cooking chamber adapted to accommodate an object to be cooked; a hot air generator having a heater-type heat source and a blower; and a shelf plate comprised of a heat-resistant material and provided in the cooking chamber so that the object is to be placed thereon, the shelf plate having openings next to both right and left sides of the shelf plate; wherein hot air generated by the hot air generator impinges on the object placed on the shelf plate as a high-speed jet through a nozzle hole provided in a ceiling of the cooking chamber so that heat is applied to the object; the hot air which has flowed through the nozzle hole and impinged on the object is drawn out through hot-air suction openings provided in lower parts of right and left side walls of the cooking chamber by the blower, whereby the hot air is returned to the hot air generator to be recirculated; the shelf plate has a convex portion formed on a face on which the object is to be placed and which is adapted to support the object from below; and the heater-type heat source constituting the hot air generator includes a plurality of U-shaped heaters each of which has radiating fins therearound, the U-shaped heaters being disposed at equal intervals in a direction of flow of air blown by the blower and locations of each odd-numbered heater and even-numbered heater are displaced by an outer diameter of the radiating fin in a direction perpendicular to the direction of the air flow so that the heaters are inclined at such an angle that peripheries of the radiating fins of the heaters adjacent to each other are seen as overlapped.