Single burn rate pot stove with secondary combustion

Abstract

A single burn rate stove including a burn chamber configured to burn biomass therein and a door configured to receive primary combustion air and provide the received primary combustion air to the burn chamber. The door is at a front of the stove. The stove further includes a bottom configured to receive secondary combustion air, a plurality of secondary air tubes extending across a top of the burn chamber, and a secondary air manifold configured to conduct the secondary combustion air from the bottom to the plurality of secondary air tubes.

What is claimed is: 
     
         1 . A single burn rate stove comprising:
 a burn chamber configured to burn biomass therein;   a door configured to receive primary combustion air and provide the received primary combustion air to the burn chamber, wherein the door is at a front of the stove;   a bottom configured to receive secondary combustion air;   a plurality of secondary air tubes extending across a top of the burn chamber, wherein the plurality of secondary air tubes comprises:
 a first air tube comprising a first set of air outlets; 
 a second air tube comprising a second set of air outlets; and 
 a third air tube comprising a third set of air outlets, wherein the first, second, and third air outlets are each directed to a front of the burn chamber; and 
   a secondary air manifold configured to conduct the secondary combustion air from the bottom to the plurality of secondary air tubes.   
     
     
         2 . The single burn rate stove of  claim 1 , wherein:
 the bottom comprises a bottom of the burn chamber and a bottom plate spaced apart from the bottom of the burn chamber; and   the secondary combustion air enters the bottom at the front of the stove.   
     
     
         3 . The single burn rate stove of  claim 1 , wherein:
 the bottom comprises a bottom of the burn chamber and a bottom plate spaced apart from the bottom of the burn chamber;   the secondary combustion air enters the bottom at the front of the stove; and   the secondary air manifold receives the secondary combustion air from the bottom of the burn chamber at a back of the burn chamber opposite the front of the stove.   
     
     
         4 . The single burn rate stove of  claim 1 , wherein:
 the bottom comprises a bottom of the burn chamber and a bottom plate spaced apart from the bottom of the burn chamber;   the secondary combustion air enters the bottom at the front of the stove;   the secondary air manifold receives the secondary combustion air from the bottom of the burn chamber at a back of the burn chamber opposite the front of the stove;   the secondary air manifold is spaced apart from a side of the burn chamber; and   the secondary air manifold is spaced apart from the back of the burn chamber.   
     
     
         5 . The single burn rate stove of  claim 1 , wherein:
 the bottom comprises a bottom of the burn chamber and a bottom plate spaced apart from the bottom of the burn chamber;   the secondary combustion air enters the bottom at the front of the stove;   the secondary air manifold receives the secondary combustion air from the bottom of the burn chamber at a back of the burn chamber opposite the front of the stove;   the secondary air manifold is a first secondary air manifold spaced apart from a first side of the burn chamber and spaced apart from the back of the burn chamber;   the first secondary air manifold connects to a first end of each secondary air tube of the plurality of secondary air tubes;   the stove further comprises a second secondary air manifold configured to receive secondary combustion air from the bottom of the burn chamber and provide the secondary combustion air to a second end of each secondary air tube of the plurality of secondary air tubes opposite the first end of each secondary air tube of the plurality of secondary air tubes; and   the second secondary air manifold is spaced apart from the back of the burn chamber and spaced apart form a second side of the burn chamber opposite the first side of the burn chamber.   
     
     
         6 . The single burn rate stove of  claim 1 , wherein:
 the door is configured to selectively open to enable placing the biomass in the burn chamber.   
     
     
         7 . The single burn rate stove of  claim 1 , wherein:
 the door is configured to receive the primary combustion air at a top of the door and provide the primary combustion air to the burn chamber at a bottom of the door.   
     
     
         8 . The single burn rate stove of  claim 1 , wherein:
 the first air tube is connected to the secondary air manifold next to a proximal end of the secondary air manifold, the first air tube comprising three sets of air outlets, the first set of air outlets being one of the three sets of air outlets;   the second air tube is connected to the secondary air manifold and located distally of the first air tube, the second air tube comprising a single set of air outlets, the second set of air outlets being the single set of air outlets.   
     
     
         9 . (canceled) 
     
     
         10 . (canceled) 
     
     
         11 . A stove comprising:
 a burn chamber configured to burn biomass therein;   a primary combustion airflow system configured to intake primary combustion air and direct the primary combustion air into the burn chamber; and   a secondary combustion airflow system configured to intake secondary combustion air, preheat the secondary combustion air, and direct the secondary combustion air into the burn chamber, the secondary combustion airflow system comprising:
 a secondary air intake configured to intake the secondary combustion air; 
 at least one secondary air manifold fluidly connected to the secondary air intake, the at least one secondary air manifold disposed within and extending from a bottom to a top of the burn chamber; 
 a first air tube connected to and extending from the at least one secondary air manifold across the top of the burn chamber, the first air tube configured to output the secondary combustion air into the burn chamber, the first air tube comprising a first set of air outlets directed to a front of the burn chamber; and 
 a second air tube connected to and extending from the at least one secondary air manifold across the top of the burn chamber, the second air tube configured to output the secondary combustion air into the burn chamber, the second air tube comprising a second set of air outlets directed to the front of the burn chamber. 
   
     
     
         12 . The stove of  claim 11 , wherein:
 the at least one secondary air manifold comprises a first manifold and a second manifold spaced apart from the first manifold;   each first and second air tube is connected to and extends between the first manifold and the second manifold such that the secondary combustion air is simultaneously fed into each end of each first and second air tube, respectively by the first manifold and the second manifold, resulting in an even distribution of the secondary combustion air across a length of each first and second air tube.   
     
     
         13 . The stove of  claim 11 , wherein:
 the first air tube comprises two or more sets of air outlets;   the second air tube comprises a single set of air outlets such that the secondary combustion air is unevenly and only distributed into the burn chamber by the first and second air tubes.   
     
     
         14 . The stove of  claim 11 , wherein:
 the first air tube comprises three sets of air outlets, each set oriented differently from one another to individually distribute the secondary combustion air into the burn chamber; and   the second air tube comprises a single set of air outlets.   
     
     
         15 . The stove of  claim 11 , wherein:
 the first air tube comprises:
 the first set of air outlets located at a front of the first air tube and configured to direct the secondary combustion air horizontally and forwardly toward a front of the burn chamber; 
 rear facing outlets located at a back of the first air tube and configured to direct the secondary combustion air horizontally and rearwardly toward a back of the burn chamber; and 
 downward facing outlets located at a bottom of the first air tube and configured to direct the secondary combustion air vertically downward toward the bottom of the burn chamber; and 
   the second air tube comprises:
 front facing outlets located at a front of the second air tube and configured to direct the secondary combustion air horizontally and forwardly toward the front of the burn chamber. 
   
     
     
         16 . The stove of  claim 11 , wherein:
 the at least one secondary air manifold comprises a proximal end located next to a front of the burn chamber;   the first air tube is located next to the proximal end of the at least one secondary air manifold; and   the second air tube is located distally of the first air tube on the at least one secondary air manifold.   
     
     
         17 . The stove of  claim 11 , further comprising:
 a third air tube connected to and extending from the at least one secondary air manifold across the top of the burn chamber, the third air tube configured to output the secondary combustion air into the burn chamber.   
     
     
         18 . The stove of  claim 17 , wherein:
 the at least one secondary air manifold comprises a proximal end located next to a front of the burn chamber;   the first air tube is located next to the proximal end of the at least one secondary air manifold;   the second air tube is located distally of the first air tube on the at least one secondary air manifold; and   the third air tube is located distally of the second air tube on the at least one secondary air manifold.   
     
     
         19 . The stove of  claim 11 , wherein:
 the at least one secondary air manifold is disposed within the burn chamber so that a primary combustion of the biomass in the burn chamber preheats the secondary combustion air passing through the at least one secondary air manifold and each first and second air tube.   
     
     
         20 . The stove of  claim 11 , wherein:
 the at least one secondary air manifold comprises:
 a first portion connected to the bottom of the burn chamber and fluidly coupled to the secondary air intake, the first portion extending substantially upwardly and vertically from the bottom of the burn chamber; and 
 a second portion fluidly coupled to the first portion, the second portion extending substantially laterally and horizontally from the first portion, and the second portion mounting the first and second air tubes.