Exhaust gas mixing flue for gas appliance

Patent metadata

Field	Value
Publication number	US-11339975-B2
Application number	US-202016792335-A
Country	US
Kind code	B2
Filing date	Feb 17, 2020
Priority date	Feb 17, 2020
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A domestic cooking appliance includes: a main housing; a cooking compartment; a gas burner that provides heat to the cooking compartment; a cooling air passageway located between the cooking compartment and a rear wall of the main housing, the cooling air passageway being separated from the cooking compartment by a rear wall of the cooking compartment; and a gas flue. The gas flue has an exhaust gas inlet open to the cooking chamber, the exhaust inlet being located in a lower panel of the gas flue, a cooling air inlet open to the cooling air passageway, an outlet located above the exhaust gas inlet, above the cooling air inlet, and above an uppermost portion of the cooking compartment, and an upper deflector located above the outlet and angled relative to vertical at a non-zero first angle such that the upper deflector extends over at least a portion of the outlet.

First claim

What is claimed is:

1. A domestic cooking appliance for heating a food item, comprising:
a main housing having a rear wall;
a cooking compartment in the main housing, the cooking compartment being configured to receive the food item to be heated;
a gas burner that provides heat to the cooking compartment;
a cooling air passageway for drawing cooling air into the main housing, the cooling air passageway being located between the cooking compartment and the rear wall of the main housing and separated from the cooking compartment by a rear wall of the cooking compartment; and
a gas flue having
an exhaust gas inlet open to the cooking chamber for venting exhaust gasses, the exhaust inlet being located in a bottom panel of the gas flue,
a cooling air inlet open to the cooling air passageway for drawing cooling air into the gas flue, wherein cooling air and exhaust gasses are mixed,
an outlet located above the exhaust gas inlet, above the cooling air inlet, and above an uppermost portion of the cooking compartment,
an upper deflector located above the outlet and angled relative to vertical at a non-zero first angle such that the upper deflector extends over at least a portion of the outlet,

an internal deflector that extends into the cooling air passageway at a non-zero second angle relative to horizontal, the internal deflector having a first edge and a second edge, the first edge attached to the bottom panel of the gas flue such that the internal deflector extends from the bottom panel of the gas flue, and the second edge is opposite the first edge and extends into the cooling air passageway, wherein the bottom panel of the gas flue extends horizontally,
a lower panel that extends at an angle relative to horizontal, which is different from the non-zero second angle, the lower panel being positioned opposite from the bottom panel, and
an internal deflector extension having a first edge and a second edge,
the first edge of the internal deflector extension is attached to the second edge of the internal deflector,
the second edge of the internal deflector extension is opposite the first edge of the internal deflector, and
the second edge of the internal deflector extension is non-coplanar with a plane defined by the first and second edges of the internal deflector.

2. The domestic cooking appliance of claim 1 , wherein the internal deflector extension extends farther into the cooling air passageway than does the internal deflector.

3. The domestic cooking appliance of claim 2 , wherein the internal deflector extension extends from the internal deflector at a third angle relative to horizontal, and the third angle is greater than the second angle.

4. The domestic cooking appliance of claim 3 , wherein the gas flue further comprises a rear wall, and the cooling air inlet is a gap between the rear wall of the gas flue and the second edge of the internal deflector extension.

5. The domestic cooking appliance of claim 4 , wherein the cooling air passageway has a width in a first direction from a front of the appliance to a rear of the appliance,
the cooling air inlet has a width in the first direction, and
the width of the cooling air inlet is less than the width of the cooling air passageway immediately below the cooling air inlet.

6. The domestic cooking appliance of claim 5 , wherein the cooling air passageway extends from a bottom of the main housing to the cooling air inlet.

7. The domestic cooking appliance of claim 6 , wherein the rear wall of the gas flue is separated by a gap from the rear wall of the main housing.

8. The domestic cooking appliance of claim 1 , wherein the gas flue further comprises a rear wall, and the cooling air inlet is a gap between the rear wall of the gas flue and the second edge of the internal deflector.

9. The domestic cooking appliance of claim 8 , wherein the cooling air passageway has a width in a first direction from a front of the appliance to a rear of the appliance,
the cooling air inlet has a width in the first direction, and
the width of the cooling air inlet is less than the width of the cooling air passageway immediately below the cooling air inlet.

10. A domestic cooking appliance for heating a food item, comprising:
a main housing having a rear wall;
a cooking compartment in the main housing, the cooking compartment being configured to receive the food item to be heated;
a gas burner that provides heat to the cooking compartment;
a cooling air passageway for drawing cooling air into the main housing, the cooling air passageway being located between the cooking compartment and the rear wall of the main housing, and separated from the cooking compartment by a rear wall of the cooking compartment; and
a gas flue having
an exhaust gas inlet open to the cooking chamber for venting exhaust gasses, the exhaust gas inlet being located in a bottom panel of the gas flue,
a cooling air inlet open to the cooling air passageway for drawing cooling air into the gas flue, wherein cooling air and exhaust gasses are mixed,
an outlet located above the exhaust gas inlet, above the cooling air inlet, and above an uppermost portion of the cooking compartment,
an internal deflector that extends into the cooling air passageway, the internal deflector extending at a non-zero second angle relative to horizontal, the internal deflector having a first edge and a second edge, the first edge being attached to the bottom panel of the gas flue such that the internal deflector extends from the bottom panel of the gas flue, and the second edge is opposite the first edge and extends into the cooling air passageway,

wherein the bottom panel extends horizontally,
a lower panel that extends at an angle relative to horizontal, which is different from the non-zero second angle, the lower panel being positioned opposite from the bottom panel, and
a rear wall, the cooling air inlet being a gap between the rear wall of the gas flue and the second edge of the internal deflector.

11. The domestic cooking appliance of claim 10 , wherein the cooling air passageway has a width in a first direction from a front of the appliance to a rear of the appliance,
the cooling air inlet has a width in the first direction, and
the width of the cooling air inlet is less than the width of the cooling air passageway immediately below the cooling air inlet.

Assignees

• Bsh Home Appliances Corp
• Bsh Hausgeraete Gmbh

Inventors

• Braden Ben
• Mciver Ian
• Moyers Richard
• Osborne Charles
• Parker Rose Marie
• Russell Timothy

Classifications

• F24C3/08

  Arrangement or mounting of burners · CPC title

• F24C15/2007 Primary

  from oven cavities · CPC title

• F24C15/006

  Arrangements for circulation of cooling air · CPC title

• F24C15/001

  arrangements for discharging combustion gases · CPC title