Air flow cooking appliance
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Solution Overview
Problem
Convection or air flow cooking appliances have complex internal structures and fail to effectively release steam generated during cooking, leading to inefficiencies and potential pressure issues.
Innovation Solution
A portable air flow cooking appliance featuring a centrifugal turbine and a steam extraction window oriented at specific angles to facilitate steam extraction, eliminating the need for additional deflectors and allowing steam to be released efficiently through a conduit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a complex internal structure is used in convection cooking appliances, then the appliance can maintain structural integrity, but steam extraction efficiency deteriorates
Solution Approach 1:
The internal structure is segmented into functional zones: a cooking chamber for food preparation, a steam extraction pathway with specifically oriented windows, and a turbine mechanism. This segmentation allows steam to be efficiently directed toward extraction points without requiring complex overall structure, resolving the contradiction between structural integrity and steam extraction efficiency
Solution Approach 2:
The invention extracts steam from the cooking chamber through specifically designed extraction windows positioned to intercept tangential air flow. By taking out steam at the source through optimized pathways rather than relying on complex post-processing structures, the system achieves efficient steam removal with simpler overall architecture
2Device complexity
If the extraction window is oriented parallel to the tangential line, then the structure is simpler, but steam extraction efficiency deteriorates
Solution Approach 1:
The extraction window is given a specific local orientation (non-parallel to tangential line) at the critical location where steam extraction occurs. This localized quality adjustment optimizes steam interception without requiring complex deflector components throughout the entire structure, resolving the contradiction between simplicity and extraction efficiency
Solution Approach 2:
The extraction window is intentionally oriented asymmetrically relative to the tangential line of the cooking chamber, creating an optimized extraction angle that improves steam capture efficiency without requiring additional symmetric deflector components, thus maintaining structural simplicity
3Reliability
If steam is not effectively released, then pressure buildup occurs, but the appliance structure remains unchanged
Solution Approach 1:
The steam extraction system utilizes the existing tangential air flow generated by the convection mechanism to automatically draw steam outward through the extraction windows. This self-service approach uses the appliance's own operational flow to achieve steam removal and pressure control without requiring additional active components or complex extraction systems
Solution Approach 2:
The invention employs pneumatic principles by utilizing the tangential air flow created during convection cooking to drive steam extraction. The pressure differential and flow dynamics naturally move steam from the cooking chamber through the extraction windows, achieving reliable pressure control through fluid mechanics rather than complex mechanical systems
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 appliance effectively releases steam by leveraging the tangential air flow from the centrifugal turbine, optimizing steam extraction and reducing pressure buildup, while maintaining a simple internal structure and improving user safety.
Implementation Method 1
a centrifugal turbine (2) arranged to create an air flow inside a cooking space
Implementation Method 2
the air flow, which has a tangential component at the outlet of the centrifugal turbine, strikes the extraction window
Data Source
AI summary
Food cooking appliance comprising: a centrifugal turbine arranged to create an air flow inside a cooking space, a steam extraction window arranged so as to extract, toward the exterior of the appliance, steam present inside the cooking space, wherein the extraction window has, at every point on its passageway surface, a normal direction with at least one non-zero component along a tangential direction to a circle centered on the centrifugal turbine and passing to the center of the extraction window.