# US 11,297,840 B2 · Oven appliance combustion chamber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,297,840 B2 - Document ID: US11297840B2 - Status: Granted - Kind: B2 - Application number: 16/437,268 - Filed: 2019-06-11 - Published: 2020-12-17 - Granted: 2022-04-12 - Earliest claimed: 2019-06-11 - Assignees: Haier US Appliance Solutions, Inc. - Applicants: Haier US Appliance Solutions, Inc. - Inventors: Hans Juergen Paller - Web page: https://patentgrep.com/patent/US11297840B2 ## CPC - A21B 1/28: by gaseous combustion products - F24C 3/087: {in baking ovens} - A21B 1/26: by hot air - A21B 3/04: Air-treatment devices for ovens, e.g. regulating humidity - F24C 15/32: Arrangements of ducts for hot gases, e.g. in or around baking ovens - A21B: BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING (domestic baking equipment A47J37/00) - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION ## Abstract An oven appliance includes a cabinet extending vertically between a top portion and a bottom portion. The cabinet defines a cooking chamber configured for receipt of food items for cooking. The oven appliance also includes a combustion heating assembly. The combustion heating assembly includes a tubular combustion chamber extending from an inlet to an outlet. The outlet of the tubular combustion chamber is in thermal communication with the cooking chamber to provide combustion gas from the tubular combustion chamber to the cooking chamber. The combustion heating assembly also includes a burner in fluid communication with the tubular combustion chamber via the inlet of the tubular combustion chamber. Combustion products from the burner mix with secondary air within the tubular combustion chamber to produce the combustion gas. ## Claims ### Claim 1 An oven appliance defining a vertical direction, a lateral direction and a transverse direction, the vertical, lateral and transverse directions being mutually perpendicular, the oven appliance comprising: a cabinet extending between a front portion and a back portion along the transverse direction, the cabinet also extending between a first side portion and a second side portion along the lateral direction and between a top portion and a bottom portion along the vertical direction, the cabinet defining a cooking chamber configured for receipt of food items for cooking; a door rotatably mounted to the cabinet, whereby the door is rotatable between an open position to access the cooking chamber and a closed position where the door encloses the cooking chamber; a tubular combustion chamber extending from an inlet to an outlet, the outlet of the tubular combustion chamber in thermal communication with the cooking chamber to provide combustion gas from the tubular combustion chamber to the cooking chamber; a burner positioned proximate the inlet of the tubular combustion chamber and in thermal communication with the tubular combustion chamber whereby combustion products from the burner enter the tubular combustion chamber at the inlet, wherein the burner is spaced from the inlet of the tubular combustion chamber whereby secondary air is entrained into the inlet of the tubular combustion chamber and drawn through the tubular combustion chamber by the combustion products from the burner; and a housing positioned within the cooking chamber, the housing comprising a back wall and a front wall opposite the back wall of the housing along the transverse direction, the front wall of the housing spaced apart from the door along the transverse direction, the back wall of the housing in contact with a back wall of the cooking chamber, the burner entirely enclosed by and between the back wall of the housing and the front wall of the housing and above a bottom wall of the housing, and the tubular combustion chamber at least partially enclosed within the housing by the front wall of the housing and the back wall of the housing. ### Claim 2 (depends on 1) The oven appliance of claim 1, wherein the housing comprises an inlet in fluid communication with an ambient environment outside the oven appliance, wherein the secondary air is ambient air from outside the oven appliance. ### Claim 3 (depends on 1) The oven appliance of claim 1, wherein the tubular combustion chamber comprises a plurality of parallel tubes each extending from an inlet to an outlet, the plurality of inlets of the plurality of tubes collectively defining the inlet of the tubular combustion chamber and the plurality of outlets of the plurality of tubes collectively defining the outlet of the tubular combustion chamber. ### Claim 4 (depends on 3) The oven appliance of claim 3, wherein each tube of the plurality of parallel tubes comprises a rectangular cross-section. ### Claim 5 (depends on 3) The oven appliance of claim 3, wherein the plurality of inlets of the plurality of parallel tubes are aligned along the vertical direction, aligned along the transverse direction, and spaced apart along the lateral direction. ### Claim 6 (depends on 1) The oven appliance of claim 1, wherein the inlet of the tubular combustion chamber comprises a flared section. ### Claim 7 (depends on 1) The oven appliance of claim 1, wherein the tubular combustion chamber comprises a body portion between the inlet and the outlet, and wherein the outlet of the combustion chamber is oblique to the body portion. ### Claim 8 (depends on 7) The oven appliance of claim 7, wherein the tubular combustion chamber is positioned proximate the back portion of the cabinet, and the outlet of the tubular combustion chamber is oriented towards the front portion of the cabinet along the transverse direction and oriented towards the top portion of the cabinet along the vertical direction. ### Claim 9 (depends on 1) The oven appliance of claim 1, wherein the tubular combustion chamber extends from the inlet to the outlet along the vertical direction. ### Claim 10 (depends on 1) The oven appliance of claim 1, wherein the burner is spaced from the inlet of the tubular combustion chamber along the vertical direction, wherein the burner defines a width along the transverse direction, and wherein the inlet of the tubular combustion chamber defines a width along the transverse direction, the width of the inlet being greater than the width of the burner. ### Claim 11 (depends on 1) The oven appliance of claim 1, wherein the burner and the tubular combustion chamber are positioned proximate the top portion of the cabinet and proximate the back portion of the cabinet. ### Claim 12 An oven appliance, comprising: a cabinet extending vertically between a top portion and a bottom portion, the cabinet defining a cooking chamber configured for receipt of food items for cooking; a door rotatably mounted to the cabinet, whereby the door is rotatable between an open position to access the cooking chamber and a closed position where the door encloses the cooking chamber; a tubular combustion chamber extending from an inlet to an outlet, the outlet of the tubular combustion chamber in thermal communication with the cooking chamber to provide combustion gas from the tubular combustion chamber to the cooking chamber; a burner in fluid communication with the tubular combustion chamber via the inlet of the tubular combustion chamber, wherein combustion products from the burner mix with secondary air within the tubular combustion chamber to produce the combustion gas; and a housing positioned within the cooking chamber, the housing comprising a back wall and a front wall opposite the back wall of the housing along the transverse direction, the front wall of the housing spaced apart from the door along the transverse direction, the back wall of the housing in contact with a back wall of the cooking chamber, the burner entirely enclosed by and between the back wall of the housing and the front wall of the housing and above a bottom wall of the housing, and the tubular combustion chamber at least partially enclosed within the housing by the front wall of the housing and the back wall of the housing. ### Claim 13 (depends on 12) The oven appliance of claim 12, wherein the housing comprises an inlet in fluid communication with an ambient environment outside the oven appliance, wherein the secondary air is ambient air from outside the oven appliance. ### Claim 14 (depends on 12) The oven appliance of claim 12, wherein the tubular combustion chamber comprises a plurality of parallel tubes each extending from an inlet to an outlet, the plurality of inlets of the plurality of tubes collectively defining the inlet of the tubular combustion chamber and the plurality of outlets of the plurality of tubes collectively defining the outlet of the tubular combustion chamber. ### Claim 15 (depends on 14) The oven appliance of claim 14, wherein each tube of the plurality of parallel tubes comprises a rectangular cross-section. ### Claim 16 (depends on 12) The oven appliance of claim 12, wherein the inlet of the tubular combustion chamber comprises a flared section. ### Claim 17 (depends on 12) The oven appliance of claim 12, wherein the tubular combustion chamber comprises a body portion between the inlet and the outlet, and wherein the outlet of the combustion chamber is oblique to the body portion. ### Claim 18 (depends on 12) The oven appliance of claim 12, wherein the tubular combustion chamber extends vertically from the inlet to the outlet. ### Claim 19 (depends on 2) The oven appliance of claim 2, further comprising a duct extending through the cabinet from a vent in the cabinet to the inlet in the housing, whereby the ambient air from outside the oven appliance is provided by the duct. ### Claim 20 (depends on 13) The oven appliance of claim 13, further comprising a duct extending through the cabinet from a vent in the cabinet to the inlet in the housing, whereby the ambient air from outside the oven appliance is provided by the duct.