초록 ▼

Fuel is burned in the lower chamber of a furnace with hot products of combustion rising past an air-to-air heat exchanger to an upper chamber to which outside air is supplied for secondary combustion. Air is heated in a compartment above the upper combustion chamber and passes, together with air wit

Fuel is burned in the lower chamber of a furnace with hot products of combustion rising past an air-to-air heat exchanger to an upper chamber to which outside air is supplied for secondary combustion. Air is heated in a compartment above the upper combustion chamber and passes, together with air within the heat exchanger, through a closed circulation system to a duct within a stone-filled heat storage chamber, then to an air-to-water heat exchanger, through the stones in the heat storage chamber and back to the heating compartment and air-to-heat exchanger. Water heated in the air-to-water exchanger is used for space heating purposes, as in baseboard hot water heaters. Some of the heat may also be used to power a heat engine and/or to dry wood to be used as fuel in the lower combustion chamber.

대표청구항 ▼

A heating system comprising: (a) a fuel-burning furnace having at least one outlet for a supply of air heated by-products of combustion therein: (b) a heat storage chamber including an enclosure containing a heat absorbing and retaining material with substantial surrounding air space; (c) first duct

A heating system comprising: (a) a fuel-burning furnace having at least one outlet for a supply of air heated by-products of combustion therein: (b) a heat storage chamber including an enclosure containing a heat absorbing and retaining material with substantial surrounding air space; (c) first duct means conducting said supply of air from said furnace to and through said heat storage chamber for mutual heat exchange between said air and said material; (d) an air-to-water heat exchanger positioned exteriorly of said heat storage chamber wherein heat from said air is transferred to water passing through said exchanger; (e) at least one space heating means through which water flows to give up heat to room air, said water flowing in a continuous path between said exchanger and said space heating means; (f) second duct means conducting air from said air space surrounding said material in said heat storage chamber to said furnace for re-heating therein; (g) a smoke pipe for venting said products of combustion from said furnace; (h) third duct means for conducting said supply of air from said heat storage chamber to said heat exchanger; and (i) fourth duct means for conducting said supply of air from said heat exchanger back to said heat storage chamber.