Multi-Zone Oven Low-Profile Separator Design for Compact Height
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Solution Overview
Problem
Conventional multi-zone ovens with proximate-air delivery face challenges in compact design and efficient cooking due to the need for substantial space between cavities for insulation and air delivery, which increases height and reduces cooking volume.
Innovation Solution
The use of extremely low-profile separators and an innovative air distribution plate design with thin plenums allows for compact, multi-zone ovens with reduced height and increased cooking volume, managing heat leakage through active feedback control and proper cavity loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If substantial space is provided between cavities for insulation and air delivery, then thermal isolation and air delivery are improved, but oven height increases and cooking volume is reduced
Solution Approach 1:
The patent combines the insulation function and air delivery function into a single integrated plenum structure. The plenum serves dual purposes: it provides thermal isolation between cavities while simultaneously serving as the air delivery pathway, thereby eliminating the need for separate insulation space and reducing overall oven height.
Solution Approach 2:
The separator between cavities is designed to perform multiple functions: it provides thermal insulation, serves as an air delivery plenum, and acts as a structural support. This multi-functionality allows the same component to address multiple requirements without increasing oven dimensions.
2Productivity
If substantial space is provided between cavities for insulation and air delivery, then air delivery is improved, but cooking volume is reduced
Solution Approach 1:
The air delivery plenum is merged with the cavity separator structure, allowing air to be delivered through the separator itself rather than requiring a separate air delivery channel. This integration eliminates wasted space and maximizes the cooking volume available within the oven.
3Length of stationary object
If thin plenums are used to reduce height, then oven compactness is improved, but heat leakage between cavities increases
Solution Approach 1:
The patent employs active feedback control through temperature sensors and adjustable blowers in each cavity. The system continuously monitors temperature and adjusts air circulation to compensate for heat leakage through the thin plenum, maintaining thermal isolation without requiring substantial physical separation.
Solution Approach 2:
The patent replaces passive mechanical insulation (thick physical barriers) with an active thermal management system using sensors and controlled air circulation. This substitution allows thin plenums to achieve effective thermal isolation through dynamic control rather than static thickness.
4Length of stationary object
If low-profile separators are used to reduce height, then oven compactness is improved, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes thin, flexible plenum structures that can be easily formed and installed. These thin-walled structures are simpler to manufacture than rigid thick separators, as they can be formed from sheet metal or other flexible materials using standard fabrication processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables the construction of compact, multi-zone ovens that maintain efficient cooking performance while minimizing height and maximizing usable volume, allowing for easier cleaning and customization of cavity sizes.
Implementation Method 1
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
Implementation Method 2
each cavity provides a separate heater and a thermal sensor placed in the circulated air after the airstream openings but before the heater
Implementation Method 3
a thermal sensor placed in the circulated air after the airstream openings but before the heater
Implementation Method 4
A controller receives a control set point and a signal from the thermal sensor to control the heater
Data Source
AI summary
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.