Stove with self-air drawing and heating for primary burn

Abstract

A stove including spiraling walls to create multiple vertical inlets, spiraling layers of spaces that can self-draw and self-heat the air from outside of the stove into the burn zone, and a rim that covers the top area of the spiraling walls and leaves an opening above the fire. From burning, a convection draft draws air from the side-environment of the stove through the vertical inlets to circulate in the spiraling layered space, and to supply to the fire horizontally. The circling of air will be heated by the fire through conduction and irradiation. This design enables extra heated air directly for an enhanced primary burn. The stove can include side walls of different profiles, e.g., straight, tilted and curved walls and different spiraling profiles of spiraling layered spaces, e.g., linear, exponential, and exponential-polynomial.

What is claimed herein is: 
     
         1 . A stove comprising a wall extending from and surrounding a base, defining an opening, said base comprising at least one hole and at least one structure extending from said base into said opening, said at least one structure is configured to elevate a solid fuel from said base to aid combustion of the solid fuel within said opening and said at least one hole is configured to allow air to be drawn through said base into said opening from exterior of said opening through said base to aid combustion of the solid fuel within said opening and to allow combustion products to be discarded from said opening through said at least one hole. 
     
     
         2 . The stove of  claim 1 , wherein said wall comprises at least one spiral wall configured to wind outwardly a number of turns to form said opening, said at least one spiral wall configured to be disposed in an arrangement to form at least one starting gap between two successive walls formed of said at least one spiral wall at an outer periphery of said at least one spiral wall, said at least one starting gap continues through a path to an ending gap between two successive walls formed of said at least one spiral wall at said opening; and a cover comprising an opening, said cover configured to be disposed atop said at least one spiral wall to contain said path, leaving said opening of said cover to match said opening of said at least one spiral wall, wherein a combustion within said opening of said at least one spiral wall, draws air for combustion through said at least one starting gap, said path and said at least one ending gap into said opening of said at least one spiral wall. 
     
     
         3 . The stove of  claim 1 , wherein said wall comprises at least two spiral walls, a first spiral wall of said at least two spiral walls configured to wind outwardly a number of turns and a second spiral wall of said at least two spiral walls configured to wind outwardly a number of turns to form an opening together, said at least two spiral walls configured to be disposed in an arrangement to form at least two starting gaps each between two successive walls formed of said at least two spiral walls, each said at least two starting gaps continues through a path to each of at least two ending gaps each between two successive walls formed of said at least two spiral walls; and a cover comprising an opening, said cover configured to be disposed atop said at least two spiral walls to contain said path, leaving said opening of said cover to match said opening of said at least two spiral walls, wherein a combustion within said opening of said at least two spiral walls, draws air for combustion through each said starting gap, each said path and each said ending gap. 
     
     
         4 . The stove of  claim 3 , wherein said at least two spiral walls are each constructed from a material selected from the group consisting of stainless steel, metal, fire refractory material, fireclay refractory material, high alumina refractory material, silica brick, magnesite refractory material, chromite refractory material, zirconia refractory material, insulating material, monolithic refractory material and any combinations thereof. 
     
     
         5 . The stove of  claim 3 , wherein each of said number of turns of said first spiral and said number of turns of said second spiral is at least about two turns. 
     
     
         6 . The stove of  claim 3 , wherein said at least two spiral walls are configured to form a structure selected from a shape consisting of a round shape, a polygonal shape and a dome shape. 
     
     
         7 . The stove of  claim 3 , wherein each said starting gap further comprises a top starting gap and a bottom starting gap and each said ending gap further comprises a top ending gap and a bottom ending gap, wherein each said top starting gap is smaller than each said bottom starting gap and each said top ending gap is smaller than each said bottom ending gap. 
     
     
         8 . The stove of  claim 3 , further comprising a base configured to be disposed at the bottom of said at least two spiral walls to further contain each said path. 
     
     
         9 . The stove of  claim 3 , wherein each said at least two spiral walls comprises a thickness of at least about 1/32 inch. 
     
     
         10 . The stove of  claim 3 , wherein each of said at least two spiral walls comprises a profile selected from the group consisting of a linear profile, an exponential profile, an exponential-polynomial profile and any combinations thereof. 
     
     
         11 . The stove of  claim 3 , wherein each of said at least two spiral walls leans inwardly. 
     
     
         12 . The stove of  claim 3 , wherein said path comprises a cross-sectional profile having an aspect ratio of about 1/40 to about 1/5. 
     
     
         13 . The stove of  claim 1 , wherein said base is disposed in a plane and said at least one structure comprises at least one plate extending substantially at a right angle with respect to said plane from said base. 
     
     
         14 . The stove of  claim 1 , further comprising a cover comprising an opening, said cover configured to be disposed atop said wall and a rim extending from a periphery of said opening of said cover, said rim configured to provide a barrier to prevent accidental entry of a food item into said opening of said wall while the food item is disposed on said cover. 
     
     
         15 . The stove of  claim 1 , the area of said at least one hole is at least about 40% of the area of the base under said opening.