Convection Oven Front Access and Reversible Blower Control
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Solution Overview
Problem
Conventional bread-baking ovens face challenges such as inconvenient access to electrical components, inefficient steam management, and non-uniform cooking due to suboptimal gas circulation systems.
Innovation Solution
A convection oven design featuring a movable front wall for easy access to electrical components, a vapor collection system with a condensing device for efficient steam management, and a variable-speed, reversible blower with a controlled speed curve for uniform gas circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the front wall is made movable to expose electrical components, then ease of repair is improved, but structural stability deteriorates
Solution Approach 1:
The housing is divided into a fixed portion and a movable front wall portion. The front wall can be moved independently to expose electrical components for servicing while the main housing structure remains intact and stable. This segmentation allows repair access without compromising overall structural stability.
2Device complexity
If steam is expelled into the atmosphere, then steam management is simplified, but environmental harm increases
Solution Approach 1:
The vapor collection system captures steam that would otherwise be harmful emissions and converts it into a beneficial resource. The condensed steam is collected and can be reused, transforming a harmful environmental factor into a useful byproduct while simplifying the overall steam management approach.
3Productivity
If water injection systems use complex atomizers, then steam generation efficiency is improved, but device complexity increases
Solution Approach 1:
The complex atomizer component is removed from the water injection system. Instead, water is injected directly onto the heated blower wheel where it naturally atomizes and evaporates. This extraction of the atomizer simplifies the device while maintaining steam generation efficiency through the heated surface.
4Adaptability or versatility
If a reversible variable speed fan is used for gas circulation, then cooking flexibility is improved, but cooking uniformity deteriorates
Solution Approach 1:
The blower wheel operates at dynamically varying speeds with periodic reversals during the cooking cycle. The speed and direction change according to a predetermined curve, creating dynamic gas circulation patterns that ensure uniform heat distribution throughout the cooking chamber while maintaining cooking process flexibility.
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
The design provides convenient servicing of electrical components, efficient steam collection, and ensures uniform cooking by optimizing gas circulation patterns, resulting in improved baking outcomes.
Implementation Method 1
a blower for circulating gas (e.g., air) through the cooking chamber
Implementation Method 2
a heater for heating the gas
Implementation Method 3
a vapor collection system for collecting vapor from the cooking chamber during a cooking event. The vapor collection system comprises a condensing device above the cooking chamber having an inlet communicating with the chamber for receiving vapor and an outlet for draining condensed vapor
Data Source
AI summary
A convection oven having a vapor collection system; water injection system; easily accessible electrical components; and a variable-speed, reversible blower is disclosed. The vapor collection system collects vapor from the cooking chamber during a cooking event, condenses the vapor, and drains the condensed vapor. The water injection system injects water for impact against a blower wheel for dispersion into the air circulating through the cooking chamber. The electrical components are housed within a housing that in a closed position conceals the components and in a closed position exposes the components for easy access. The rotational speed and direction of the variable-speed, reversible blower is controlled during a cooking event according to predetermined speed curves which may include one or more reversal events to achieve more uniform cooking of food. A main controller is programmable via an operator input (e.g., liquid crystal display touch screen) to control operating parameters of the oven.