Patent ID: 9629499
Date: 2017-04-25
CPC Classifications: A47J,F24C

Claim:
1. A convection cooking apparatus comprising: a cavity unit having a cooking chamber and having a rear wall plate with an introduction hole section and a first discharge hole section; a door unit on or over the cavity unit, configured to open and close an opening of the cavity unit; a convection heater unit on or behind the rear wall plate, heating air from the cavity unit through the first discharge hole section, and supplying hot air to the cooking chamber through the introduction hole section; and a circulation duct unit connected to a second discharge hole section in a side wall plate of the cavity unit, configured to guide air discharged from the cooking chamber through the first discharge hole section back to the cooking chamber, wherein the introduction hole section is in a lower part of the rear wall plate, and the first discharge hole section is in an upper part of the rear wall plate separate from the introduction hole section, wherein the circulation duct unit comprises: a circulation duct having one end connected to the second discharge hole section and another end connected to a suction hole section in the side wall plate, configured to guide air discharged through the first discharge hole section to the suction hole section; and a duct opening and closing section in the circulation duct, configured to open and close an internal flow path of the circulation duct, wherein the circulation duct includes a discharge opening for discharging air entering through the first discharge hole section out of the circulation duct, wherein the duct opening and closing section closes the first discharge opening when opening the internal flow path of the circulation duct, and opens the discharge opening when closing the internal flow path of the circulation duct.