Fire Pit with Heat Exchanger

Abstract

An outdoor fire pit comprised of a concave fire chamber, a heat chamber that is positioned below the fire chamber and is comprised of partially enclosed area surrounding the bottom portion of the fire chamber. The fire pit includes a conduit or multiple conduits with the proximal end connected to the heat chamber and the other end extending distally from the fire pit. A fan connected to the conduit such that the fan is operable to blow or pull air through the conduit to the area surrounding the fire pit.

What is claimed: 
     
         1 . An outdoor fire pit comprising:
 a concave fire chamber;   a heat chamber that is fastened below the fire chamber and is comprised of partially enclosed area surrounding the bottom portion of the fire chamber;   a conduit with the proximal end connected to the heat chamber and the distal end extending to the area surrounding the fire pit; and   a fan connected to the conduit such that the fan is operable to blow or pull air through the conduit to the area surrounding the fire pit.   
     
     
         2 . The fire pit of  claim 1 , wherein the combustion of material transfers heat by conduction, convection, and radiation between the heat conducting material of the fire chamber and the heat chamber. 
     
     
         3 . The fire pit of  claim 1 , wherein the heat chamber positioned below the fire chamber, comprises the partially enclosed air space with a bottom wall and an opening in the bottom wall to allow air to flow into the chamber. 
     
     
         4 . The fire pit of  claim 1 , wherein the conduit comprises a plurality of stationary conduits extending from the heat chamber. 
     
     
         5 . The fire pit of  claim 1 , wherein the conduit comprises a plurality of flexible conduits extending from the heat chamber. 
     
     
         6 . The fire pit of  claim 1 , wherein the fan comprises a plurality of fans. 
     
     
         7 . The fire pit of  claim 1 , wherein the fan is attached near the proximal end of the conduit and pulls air through the heat chamber and blows air through the conduit. 
     
     
         8 . The fire pit of  claim 1 , wherein the fan is attached near the distal end of the conduit and pulls air through the heat chamber and conduit. 
     
     
         9 . An outdoor fire pit comprising:
 a concave fire chamber;   a heat chamber that is fastened below the fire chamber and is comprised of partially enclosed area surrounding the bottom portion of the fire chamber;   a conduit with the proximal end connected to the heat chamber and the distal end extending to the area surrounding the fire pit; and   a blower fastened to the heat chamber such that the blower is operable to blow air through the conduit to the area surrounding the fire pit.   
     
     
         10 . The fire pit of  claim 9 , wherein the conduit comprises a plurality of conduits extending from the heat chamber. 
     
     
         11 . The fire pit of  claim 9 , wherein the blower comprises a plurality of fans. 
     
     
         12 . The fire pit of  claim 9  wherein the conduit comprises a flexible conduit with the proximal end connected to the heat chamber and the distal end connected to a chair, tent, or enclosed structure near the fire pit. 
     
     
         13 . The fire pit of  claim 9  wherein the conduit comprises a plurality of flexible conduits that are attachable connected and removably connected to the heat chamber. 
     
     
         14 . An outdoor fire pit comprising:
 a concave fire chamber;   a heat chamber that is fastened below the fire chamber and is comprised of partially enclosed area surrounding the bottom portion of the fire chamber. The bottom portion of the heat chamber extends to the area surrounding the fire pit a conduit with the proximal end connected to the heat chamber and the distal end extending through the heat chamber; and   a blower fastened to the heat chamber such that the blower is operable to blow air through the conduit to the area surrounding the fire pit.   
     
     
         15 . The fire pit of  claim 14 , wherein the conduit comprises a plurality of stationary conduits extending from the heat chamber. 
     
     
         16 . The fire pit of  claim 14 , wherein the blower comprises a plurality of fans.