초록 ▼

A field-ready oven has reinforced telescoped side walls that extend and hold a base, shelf, tray support and cover spaced apart. A low air intake and a semipermeable membrane deliver air and vapor fuel to catalyst pads on the shelf. Radiant heat from exothermic reaction is diffused over a bottom of

A field-ready oven has reinforced telescoped side walls that extend and hold a base, shelf, tray support and cover spaced apart. A low air intake and a semipermeable membrane deliver air and vapor fuel to catalyst pads on the shelf. Radiant heat from exothermic reaction is diffused over a bottom of a tray. Hot gas circulates around the diffuser and tray with a chimney effect before exhausting. A lid on the cover lifts for access to the tray. A fuel container in the oven forces fuel through a capillary restriction to limit fuel flow. A spring in the container is released to start fuel flow.

대표청구항 ▼

1. Apparatus comprising a field-ready oven comprising: an oven box having a cover having a top surface, cover side walls and at least one support for holding at least one tray of contents and a base having a bottom surface, a false bottom and base side walls, wherein the false bottom is spaced above

1. Apparatus comprising a field-ready oven comprising: an oven box having a cover having a top surface, cover side walls and at least one support for holding at least one tray of contents and a base having a bottom surface, a false bottom and base side walls, wherein the false bottom is spaced above the base bottom surface and wherein the base bottom surface, base false bottom and base side walls define a false bottom cavity in the base;wherein the cover top surface, base false bottom and side walls define an oven cavity in the oven box for containing at least one tray of contents;at least one catalytic heater assembly within the oven cavity that is configured for a flameless catalytic chemical reaction and comprised of one or more catalyst pads and a semipermeable or porous membrane for delivery of fuel vapor to the one or more catalyst pads;a fuel source in communication with the catalytic heater assembly for allowing fuel to flow to the catalyst pad;a fuel motivator connected to the fuel source;an initiation system connected to the fuel motivator;at least one tray of contents having a top surface, bottom surface and sides;at least one air entry port in the base side walls near the lower portion of the base for admitting air into the false bottom cavity;at least one air flow opening in the base false bottom for passage of air from the false bottom cavity into the oven cavity, andat least one exhaust port in the cover for exhausting air and heated gases from the oven box,wherein the base false bottom supports the catalytic heater assembly such that the catalytic heater assembly is capable of heating the tray of contents upon activation;wherein the cover side walls and base side walls are configured for telescoping and wherein the at least one cover support and telescoping side walls are configured such that, when extended, the top cover extends away from the false bottom and holds the cover and tray of contents spaced apart from the false bottom to provide for an air gap between the catalytic heater assembly and the tray of contents to allow sufficient air to reach the one or more catalyst pads to maintain a flameless catalytic chemical reaction;wherein the oven box, at least one air entry port, the at least one air flow opening and the at least one exhaust port are configured to define an air passageway to allow inward flowing air from the at least one air entry port to flow into the false bottom cavity, upward through the air flow opening of the false bottom, across the bottom surface of the tray of contents in fluid contact with the fuel at the catalytic heater assembly, then vertically along at least one side of the tray of contents before finally exiting out the at least one exhaust port in the coverwherein the oven box, at least one air entry port, the at least one air flow opening and the at least one exhaust port are configured to enable convective flow of heated air and exhaust gases in thermal contact with the tray of contents whereby upon activation the heat produced motivates heated air and exhaust gases to rise causing a convective single pass flow of air by a chimney effect of air entering from the air inlet opening and exiting through the exhaust vent allowing adequate oxygen rich air to come in contact with the catalytic heater assembly. 2. The apparatus of claim 1, further comprising a heat diffuser in thermal contact with the bottom surface of the tray of contents and situated between the catalytic heater assembly and the tray of contents and configured to diffuse radiant heat from the at least one catalytic heater assembly over the bottom surface of the tray of contents and so as not to interfere with the air flow across top of the at least one catalytic heater assembly. 3. The apparatus of claim 2, wherein the telescoping side walls are configured such that when collapsed the top cover blocks the at least one air entry port in the side walls. 4. The apparatus of claim 3, further comprising a fuel transfer system for controlling fuel delivery to the semipermeable or porous membrane. 5. The apparatus of claim 4, wherein the fuel transfer system comprises one or more fuel lines, the fuel source comprises a fuel cartridge and the initiation system comprises a valve in the fuel line for closing and opening the fuel line. 6. The apparatus of claim 5, wherein the fuel cartridge comprises a fuel container in fluid communication with the fuel motivator. 7. The apparatus of claim 6, wherein the fuel motivator is a pump or spring forced diaphragm or plunger connected to the fuel container. 8. The apparatus of claim 7, wherein the heat diffuser comprises aluminum or zinc. 9. The apparatus of claim 4, wherein the fuel motivator comprises a piston connected to the fuel source, and the initiation system comprises a cap connected to the fuel source, a spring compressed between the cap and the piston, a rod extending from the piston through the cap, and a pin connected to the rod outside of the cap, whereby removing the pin from the rod releases the compressed spring to move fuel through the apparatus. 10. The apparatus of claim 9, further comprising a water source configured to releases water on heating in order to create steam and enhance heat transfer. 11. The apparatus of claim 10, wherein the water source comprises dry water powder positioned above the heat diffuser. 12. The apparatus of claim 1, wherein the side walls are telescoping walls that are inwardly telescoped to form a reduced height of the oven and are outwardly telescoped to erect the oven ready for use. 13. A field-ready oven according to claim 1, wherein the defined air passageway is configured such that heated air and hot combustion gases are motivated by chimney effect to flow across over at least a portion of the top of the tray of contents while in thermal contact with the tray of contents before the heated air and hot combustion gases exit the oven's one or more exhaust vents. 14. The apparatus of claim 13, further comprising one or more additional exhaust vents in the cover configured such that at least some of the heated air and hot combustion gases travels across in thermal contact with the top of the tray of contents while at least some of the heated air and hot combustion gases escapes through the one or more additional exhaust vents thereby increasing the total volume of air flow entering the at least one air entry port and increasing the amount of oxygen available for the combustion reaction. 15. The apparatus of claim 6, wherein the heated air and hot gas flow across the top of the container before the heated air and hot gas exit the at least one exhaust vent opening. 16. The apparatus of claim 15, wherein the at least one exhaust vent opening further comprises plural exhaust vent openings spaced along and at ends of the top surface allowing the heated air and hot gas to escape with little restriction and increasing overall flow of incoming air and the heated air and hot gas. 17. The apparatus of claim 16, further comprising a thermally conductive sheet or panel below the container such that thermally conductive sheet does not divert or interrupt the convection of the heated air and hot gas, wherein the thermally conductive sheet absorbs radiant heat from the heater, and heat from the heated gases, to make random and uniform spatial distribution of temperatures experienced by a bottom of the container, and to re-radiate heat to the container. 18. The oven of claim 17, in which the heater comprises a fuel inlet and distribution system below a molecularly semipermeable or porous membrane, through which the fuel is diffused, which semipermeable or porous membrane is below a porous layer comprised of, coated or impregnated with catalysts such that fuel and air meet at the catalyst layer and produce heat and hot gas. 19. The apparatus of claim 18, further comprising fuel stored within the oven.