Low-profile multi-zone oven
First Claim
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1. A multi-cavity oven comprising:
- a housing defining an interior cooking volume surrounded by insulated outer walls and at least one door that may open and close to provide access to the interior cooking volume; and
a set of shelves subdividing the cooking volume into cooking cavities, the shelves providing separate upper and lower air channels divided by at least one interior barrier wall, each leading from respective air inlets to respective upwardly directed airstream openings and downwardly directed airstream openings through a jet plate;
wherein each cavity provides a separate blower circulating air from the cavity into a lower air channel of a shelf above the cavity and an upper air channel of the shelf below the cavity;
wherein each cavity provides a separate heater and a thermal sensor; and
further including a controller receiving a control set point and a signal from the thermal sensor to control the heaterwherein the barrier wall and jet plate intercommunicate mechanically to resist warpage of each shelf with variations in thermal expansion of the barrier wall and jet plate; and
wherein the upper and lower air channels of each shelf are separated by a thermal resistance having an R-value of less than one.
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Abstract
A multi-zone, proximate-air oven using air delivered from the shelves provides a compact height through the use of low profile shelves. Intercavity heat leakage is managed by active insulation techniques making use of the oven feedback temperature control and controlled cavity loading.
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Citations
27 Claims
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1. A multi-cavity oven comprising:
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a housing defining an interior cooking volume surrounded by insulated outer walls and at least one door that may open and close to provide access to the interior cooking volume; and a set of shelves subdividing the cooking volume into cooking cavities, the shelves providing separate upper and lower air channels divided by at least one interior barrier wall, each leading from respective air inlets to respective upwardly directed airstream openings and downwardly directed airstream openings through a jet plate; wherein each cavity provides a separate blower circulating air from the cavity into a lower air channel of a shelf above the cavity and an upper air channel of the shelf below the cavity; wherein each cavity provides a separate heater and a thermal sensor; and further including a controller receiving a control set point and a signal from the thermal sensor to control the heater wherein the barrier wall and jet plate intercommunicate mechanically to resist warpage of each shelf with variations in thermal expansion of the barrier wall and jet plate; and wherein the upper and lower air channels of each shelf are separated by a thermal resistance having an R-value of less than one. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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6. A multi-cavity oven comprising:
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a housing defining an interior cooking volume surrounded by insulated outer walls and at least one door that may open and close to provide access to the interior cooking volume; and a set of shelves subdividing the cooking volume into cooking cavities, the shelves providing separate upper and lower air channels divided by at least one interior barrier wall, each leading from respective air inlets to respective upwardly directed airstream openings and downwardly directed airstream openings through a jet plate; wherein each cavity provides a separate blower circulating air from the cavity into a lower air channel of a shelf above the cavity and an upper air channel of the shelf below the cavity; wherein each cavity provides a separate heater and a thermal sensor; and further including a controller receiving a control set point and a signal from the thermal sensor to control the heater; wherein the barrier wall and jet plate intercommunicate mechanically to resist warpage of each shelf with variations in thermal expansion of the barrier wall and jet plate; and wherein the upper and lower channels of each shelf are separated by a thermal resistance having an R-value less than half of the R-value in the outer walls of the oven. - View Dependent Claims (7)
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23. A multi-cavity oven comprising:
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a housing defining an interior cooking volume surrounded by insulated outer walls and at least one door that may open and close to provide access to the interior cooking volume; and a set of shelves subdividing the cooking volume into cooking cavities, the shelves providing separate upper and lower air channels divided by at least one interior barrier wall, each air channel leading from respective air inlets to respective upwardly directed airstream openings and downwardly directed airstream openings through a jet plate; wherein each cavity provides a separate blower circulating air from the cavity into a lower air channel of a shelf above the cavity and an upper air channel of the shelf below the cavity; wherein each cavity provides a separate heater and a thermal sensor placed in the circulated air after the airstream openings further including a controller receiving a control set point and a signal from the thermal sensor to control the heater; wherein the barrier wall and jet plate intercommunicate mechanically through a floating mounting adapted to resist warpage of each shelf with variations in thermal expansion of the barrier wall and jet plate. - View Dependent Claims (24, 25, 26, 27)
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Specification