Claims
- 1. In a cooking appliance including an oven cavity adapted to be used in convection cooking of food products, a heating system comprising:an air channel assembly extending about at least a portion of and being in fluid communication with the oven cavity; a blower element for developing a flow of air within the air channel assembly for delivery to the oven cavity; a heating unit positioned in the air channel assembly for heating the flow of air prior to entry into the oven cavity, said heating unit being constituted by at least one open coil heating element located downstream of the blower element, entirely between the blower element and the oven cavity; and an additional heating unit positioned in the air channel assembly upstream of the blower element.
- 2. The heating system according to claim 1, wherein the heating unit comprising a bank of open, electric heating coils.
- 3. The heating system according to claim 2, wherein the bank of heating coils comprises a plurality of electrically interconnected rows, sequentially arranged between the blower element and the oven cavity.
- 4. The heating system according to claim 3, wherein each of the plurality of rows extends transversely across the air channel assembly so as to be substantially perpendicular to a direction of travel of the flow of air.
- 5. The heating system according to claim 1, wherein the additional heating unit is positioned below the oven cavity.
- 6. The heating system according to claim 1, firer comprising: a catalyst arranged between the additional heating unit and the blower element.
- 7. The heating system according to claim 1, further comprising: a microwave generator, said additional heating element extending annularly about a portion of the microwave generator.
- 8. The heating system according to claim 1, further comprising: a temperature sensor for sensing an operating temperature of the cooking appliance.
- 9. The heating system according to claim 8, wherein the temperature sensor is arranged in the air channel assembly.
- 10. In a cooking appliance including an oven cavity adapted to be used in convection cooking of food products, a heating system comprising:an air channel assembly extending about at least a portion of and being in fluid communication with the oven cavity; a blower clement for developing a flow of air within the air channel assembly for delivery to the oven cavity; a heating unit positioned in the air channel assembly for heating the flow of air prior to entry into the oven cavity, said heating unit being constituted by a bank of open heating coils extending transversely across the air channel assembly so as to be substantially perpendicular to a direction of travel of the flow of air; and an additional heating unit positioned in the air channel assembly upstream of the blower element.
- 11. The heating system according to claim 10, wherein the bank of heating coils comprises a plurality of electrically interconnected rows, sequentially arranged between the blower element and the oven cavity.
- 12. The heating system according to claim 10, wherein the additional heating unit is positioned below the oven cavity.
- 13. The heating system according to claim 10, further comprising: a catalyst arranged between the additional heating unit and the blower element.
- 14. The heating system according to claim 10, further comprising: a microwave generator, said additional heating element extending annularly about a portion of the microwave generator.
- 15. The heating system according to claim 10, further comprising: a temperature sensor for sensing an operating temperature of the cooking appliance.
- 16. The heating system according to claim 15, wherein the temperature sensor is arranged in the air channel assembly.
Parent Case Info
This application claims the benefit of U.S. Provisional Application No. 60/153,224, filed Sep. 13, 1999.
US Referenced Citations (17)
Foreign Referenced Citations (2)
Number |
Date |
Country |
39 31 482 |
Apr 1991 |
DE |
3-144219 |
Jun 1991 |
JP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/153224 |
Sep 1999 |
US |