Burnpot for solid particulate stove

Abstract

A burnpot for a solid particulate stove is disclosed. The burnpot includes a bottom cover, a top cover, two side plates connecting the top cover and the bottom cover, a bottom grate having a plurality of bottom grate apertures disposed therein and positioned intermediate the bottom cover and the top cover, a top grate having a plurality of top grate apertures disposed therein and positioned intermediate the bottom grate and the top cover and an air passageway configured to direct air to a burn chamber of the burnpot through the bottom grate and the top grate.

1 . A burnpot for a solid particulate stove comprising:
 a bottom cover;   a top cover;   two side plates connecting the top cover and the bottom cover;   a bottom grate having a plurality of bottom grate apertures disposed therein and positioned intermediate the bottom cover and the top cover;   a top grate having a plurality of top grate apertures disposed therein and positioned intermediate the bottom grate and the top cover; and   an air passageway configured to direct air to a burn chamber of the burnpot through the bottom grate and the top grate.   
   
   
       2 . The burnpot of  claim 1 , wherein the bottom grate, top grate and a portion of each side plate define the burn chamber, wherein the bottom cover, bottom grate, and a portion of each side plate define a bottom air chamber configured to direct air into the burn chamber, and wherein the top cover, top grate, and a portion of each side plate define a top air chamber configured to direct air into the burn chamber. 
   
   
       3 . The burnpot of  claim 2 , further comprising an air transfer duct connecting the top air chamber and the bottom air chamber. 
   
   
       4 . The burnpot of  claim 2 , wherein the top air chamber is sized and configured such that up to about 40% of air entering the burnpot is directed to the top air chamber. 
   
   
       5 . The burnpot of  claim 2 , further comprising an air transfer duct connecting the top air chamber and the bottom air chamber and wherein a plurality of apertures in the bottom grate and the top grate are less than about 0.125 inches in width. 
   
   
       6 . The burnpot of  claim 2 , wherein the bottom air chamber includes an air intake aperture. 
   
   
       7 . The burnpot of  claim 2 , wherein the top air chamber is configured to direct all air entering the top air chamber through the top grate apertures. 
   
   
       8 . The burnpot of  claim 2 , wherein the top air chamber is partially enclosed and the top cover and the top grate define a gap for air to by-pass the top grate apertures. 
   
   
       9 . The burnpot of  claim 1 , wherein a plurality of bottom grate apertures are less than about 0.125 inches in width. 
   
   
       10 . The burnpot of  claim 1 , wherein a plurality of top grate apertures are less than about 0.125 inches in width. 
   
   
       11 . The burnpot of  claim 1 , wherein the bottom grate apertures are arranged in a pattern different than the top grate apertures. 
   
   
       12 . The burnpot of  claim 1 , wherein the bottom grate apertures have a corresponding density that increases as a distance from a feed aperture increases. 
   
   
       13 . The burnpot of  claim 1 , wherein the bottom grate is z-shaped and wherein the side plates, a middle portion of the bottom grate and the top grate define a constantly expanding burn chamber. 
   
   
       14 . A solid particulate stove comprising
 a hopper configured to store particulate fuel;   a firebox for burning the particulate fuel; and   a feed system configured to receive the particulate fuel from the hopper and deliver it to the firebox via an auger,   wherein a burnpot connected to the feed system is positioned within the firebox, the burnpot comprising:   a bottom cover;   a top cover;   two side plates connecting the top cover and the bottom cover;   a bottom grate having a plurality of bottom grate apertures disposed therein and positioned intermediate the bottom cover and the top cover;   a top grate having a plurality of top grate apertures disposed therein and positioned intermediate the bottom grate and the top cover; and   an air delivery passageway configured to direct supply air to a burn chamber of the burnpot through the bottom grate and the top grate and toward particulate fuel resting on the bottom grate.   
   
   
       15 . A burnpot for a solid particulate stove comprising:
 a burn chamber;   an air delivery chamber; and   a grate separating the burn chamber and the air delivery duct, the grate having apertures disposed therein to direct air from the air delivery chamber toward solid particulate fuel in the burn chamber, wherein a plurality of the apertures are less than about 0.125 inches in width.   
   
   
       16 . The burnpot of  claim 15 , wherein at least about 25% of the apertures have a width of less than about 0.125 inches in width. 
   
   
       17 . The burnpot of  claim 15 , wherein at least about 50% of the apertures have a width of less than about 0.125 inches in width. 
   
   
       18 . The burnpot of  claim 15 , wherein the plurality of apertures less than 0.125 inches in width have a width in the range of about 0.006 inches to about 0.1 inches. 
   
   
       19 . The burnpot of  claim 15 , wherein the air delivery chamber is disposed under the burn chamber and further comprising:
 a second air delivery chamber disposed above the burn chamber; and   a second grate separating the burn chamber and the second air delivery chamber, the second grate having apertures disposed therein to direct air from the second air delivery chamber toward solid particulate fuel in the burn chamber.   
   
   
       20 . The burnpot of  claim 19 , wherein at least about 50% of the second grate apertures have a width of less than about 0.125 inches in width. 
   
   
       21 . The burnpot of  claim 19 , wherein at least about 75% of the second grate apertures have a width of less than about 0.125 inches in width.