Convection oven using rack support ducts for air flow

1. An oven appliance, comprising:

a cooking chamber configured for receipt of food items for cooking, said cooking chamber defined in part by a top wall, a bottom wall, a rear wall, and opposing side walls;

at least one oven rack support positioned along and projection from one of the walls of said cooking chamber;

at least one opening defined by said oven rack support and configured for the flow of convection oven air into said cooking chamber, and,

at least one air flow channel within said at least one oven rack support to direct a flow of oven air to said at least one opening,

a fan for causing air to flow from said cooking chamber, into the at least one air flow channel of said oven rack support, and through the at least one opening on said at least one oven rack support.

2. An oven appliance as in claim 1 , wherein said at least one oven rack support comprises a pair of oven rack supports positioned in an opposing manner along the side walls.

3. An oven appliance as in claim 2 , wherein said at least opening comprises a pair of openings defined by said pair of oven rack supports.

4. An oven appliance, comprising:

a cabinet;

a cooking chamber positioned within said cabinet and configured for receipt of food items for cooking, said cooking chamber defined in part by a top wall, a bottom wall, a rear wall, and opposing side walls;

a plurality of oven rack supports projecting from one or more of the walls of said cooking chamber, said oven rack supports defining a plurality of openings positioned along one or more of said oven rack supports and configured for the flow of convection oven air into said cooking chamber, wherein said oven rack support projections extend horizontally along the opposing side walls of said cooking chamber, the projections forming channels for the flow of air along the opposing side walls and into said cooking chamber through the openings in said oven rack supports; and

a fan for causing air to flow into said cooking chamber through the openings on said oven rack supports.

5. An oven appliance as in claim 4 , wherein said plurality of oven rack supports are configured in pairs and are positioned on the opposing side walls of said oven chamber.

6. An oven appliance as in claim 5 , wherein said fan is positioned along the rear wall of the cooking chamber and is configured to draw air from said cooking chamber through the rear wall for supply to the openings on said oven rack supports.

7. An oven appliance as in claim 6 , further comprising a rear duct positioned between the rear wall of said cooking chamber and said cabinet, said duct configured for routing air from said fan to the channels of said oven rack supports.

8. An oven appliance as in claim 7 , wherein said openings are configured as slots extending along said oven rack supports.

9. An oven appliance as in claim 6 , further comprising:

an oven rack positioned upon and extending horizontally between said oven rack supports, said oven rack comprising at least one air flow guide projecting towards the bottom wall of said cooking chamber, said air flow guide positioned adjacent to one or more of the openings of the oven rack supports and configured to direct the flow of air from such one or more openings downwardly.

10. An oven appliance as in claim 6 , further comprising:

an oven rack positioned upon one or more of said oven rack supports, said oven rack comprising at least one air flow guide projecting towards the top wall of said cooking chamber, said air flow guide positioned adjacent to one or more openings of the oven rack supports and configured to direct the flow of air from the one or more openings upwardly.

11. An oven appliance as in claim 6 , wherein said openings are configured to direct a flow of air towards the top wall of the cooking chamber.

12. An oven appliance as in claim 6 , wherein said openings are configured to direct a flow of air towards the bottom wall of the cooking chamber.

13. An oven appliance as in claim 4 , wherein said fan is positioned along the top wall of the cooking chamber and is configured to draw air from said cooking chamber through the top wall for supply to the openings on said oven rack supports.

14. An oven appliance as in claim 13 , further comprising a top duct positioned between the top wall of said cooking chamber and said cabinet, said duct configured for routing air from said fan to the channels of said oven rack supports.

15. An oven appliance as in claim 14 , further comprising a pair of vertical ducts positioned along the rear wall of said cooking chamber and said cabinet, said vertical ducts in communication with said top duct and configured for routing air from said fan to the channels of said oven rack supports.

16. An oven appliance as in claim 13 , wherein said openings are configured as slots extending along said oven rack supports.

17. An oven appliance as in claim 13 , further comprising:

an oven rack positioned upon one or more of said oven rack supports, said oven rack comprising at least one air flow guide projecting towards the bottom wall of said cooking chamber, said air flow guide positioned adjacent to one or more openings on the oven rack supports and configured to direct the flow of air from the one or more openings downwardly.

18. An oven appliance as in claim 13 , further comprising:

an oven rack positioned upon one or more of said oven rack supports, said oven rack comprising at least one air flow guide projecting towards the top wall of said cooking chamber, said air flow guide positioned adjacent to one or more openings on the oven rack supports and configured to direct the flow of air from the one or more openings upwardly.