Cooking Device With Pyrolysis Function

Abstract

The cooking device with pyrolysis function includes a cooking cavity, a heating means located within the cooking cavity for emitting heat, a combustion tube having a hollow portion formed to surround the heating means, the combustion tube being heated by the heating means and radiates its heat to the center of the cooking cavity, a combustion space formed between the heating means and the combustion tube in which cooking fumes are decomposed by the heat from the heating means, a fan adapted to withdraw air from the cooking cavity and to discharge a part or ail of the air through the connection tube into the combustion space, a connection tube for connecting fluid communication between the combustion tube and the fan, and a gas outlet for venting the steam and air in the combustion space to the outside of the cooking device.

What is claimed is: 
     
         1 . A cooking device comprising:
 a cooking cavity surrounded by cavity walls and an oven door;   a heating means located within the cooking cavity for emitting heat therefrom;   a combustion tube having a hollow portion formed to enclose the heating means, the combustion tube being heated by the heating means and radiates its heat to the center of the cooking cavity;   a combustion space formed between the heating means and the combustion tube in which cooking fumes are decomposed by the heat from the heating means;   a fan adapted to withdraw air from the cooking cavity and to discharge a part or all of the air through the connection tube into the combustion space;   a connection tube for connecting fluid communication between the combustion tube and the fan; and   a gas outlet for venting the steam and air in the combustion space to the outside of the cooking device.   
     
     
         2 . The oven of  claim 1 , wherein the heating means has the dual function of warming food via the combustion tube, which applies radiant heat to the cooking cavity, as well as causing thermal decomposition of cooking fumes. 
     
     
         3 . The oven of  claim 1 , wherein the fan prevents the cooking fumes from spreading out of the cooking cavity by maintaining a lower-than-the-atmospheric pressure within the cooking cavity. 
     
     
         4 . The oven of  claim 1 , wherein the heating means comprises any heating source selected from a flame generated by the oxidation of fuel or a heater connected to the heat source. 
     
     
         5 . The oven of  claim 1 , wherein the combustion tube is selected from a group consisting of ceramics, heat-resisting metals, and a combination of ceramics and heat-resisting metals. 
     
     
         6 . The oven of  claim 1 , further comprising an air supply adapted to inject fresh air into the combustion space. 
     
     
         7 . The oven of  claim 1 , wherein the connection tube is connected to the combustion tube near the connection tube inlet, maximizing the contacting distance of cooking fumes with the heating means to improve the efficiency of the pyrolysis process. 
     
     
         8 . The oven of  claim 1 , wherein the fan is a centrifugal fan. 
     
     
         9 . The oven of  claim 1 , further comprising a temperature sensor for sensing the operating temperature of the cooking cavity. 
     
     
         10 . The oven of  claim 1 , wherein the amount of air introduced into the combustion space is controlled by the fan to adjust the pressure of the cooking cavity or the amount of cooking fumes to be pyrolyzed. 
     
     
         11 . The oven of  claim 1 , wherein the combustion tube is located at the higher position than the center of the cooking cavity. 
     
     
         12 . The oven of  claim 1 , further comprising a bottom heating means adapted to warm the bottom portion of the cooking cavity. 
     
     
         13 . The oven of  claim 12 , wherein the bottom heating means comprises any heating source selected from flame generated by the oxidation of fuel or a heater connected to power source.