Rear Burner Cover Airflow Layout for Stable Oven Flames
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Solution Overview
Problem
Conventional cooking devices face issues such as contamination from food leftovers, difficulty in cleaning, reduced oven chamber capacity, and flame instability due to the open bottom surface and placement of the lower burner below the oven chamber, leading to pressure changes and potential backfiring or extinguishment of the flame.
Innovation Solution
A cooking device design featuring a frame with a burner assembly located at the rear, forming a closed bottom surface that increases the oven chamber capacity, and a burner cover with specific holes for air flow that prevents foreign materials from entering the burner chamber and stabilizes the flame by allowing efficient air circulation and pressure regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the lower burner is installed below the oven chamber to convectively heat food, then heating efficiency is improved, but the bottom surface of the oven chamber must be open causing contamination and cleaning difficulty
Solution Approach 1:
The patent divides the heating function into two separate burners: an upper burner and a lower burner, both positioned within the oven chamber rather than placing the lower burner below the chamber. This segmentation allows the oven chamber to maintain a closed bottom surface while still achieving convective heating through the coordinated operation of both burners.
Solution Approach 2:
The patent introduces a vertical arrangement of two burners (upper and lower) within the oven chamber, utilizing the vertical dimension to achieve convective heating patterns. This dimensional approach allows heated air to circulate vertically throughout the chamber, maintaining heating efficiency without requiring an open bottom surface.
2Use of energy by moving object
If the lower burner is installed below the oven chamber, then convective heating is achieved, but the cavity capacity of the oven chamber is reduced due to burner insulation space requirements
Solution Approach 1:
By segmenting the heating function into two burners positioned within the oven chamber volume, the patent eliminates the need for external insulation space below the chamber. Both burners operate within the existing chamber boundaries, maximizing the usable cavity capacity while maintaining convective heating capability.
Solution Approach 2:
The patent nests both the upper and lower burners within the oven chamber volume, effectively utilizing the internal space for heating functions. This nesting approach allows the burners to be contained within the chamber boundaries rather than requiring external space, thereby preserving maximum oven capacity.
3Ease of operation
If the oven door is opened and closed while mixed gas is burning in the lower burner, then access is provided, but pressure changes cause backfiring or extinguishment of the flame
Solution Approach 1:
The patent segments the gas supply system into separate control mechanisms for the upper and lower burners, allowing independent or coordinated operation. This segmentation enables better pressure management during door operations, as the distributed burner configuration reduces sudden pressure fluctuations that could cause backfiring or flame extinguishment.
Solution Approach 2:
The patent incorporates pressure regulation mechanisms and insulation structures around the burners that cushion against pressure changes caused by door operations. These pre-designed protective features prevent pressure fluctuations from directly affecting the flame stability, ensuring reliable operation during access cycles.
4Use of energy by moving object
If the oven chamber and burner chamber are in communication to provide heated air, then heating is achieved, but food leftovers can be introduced into the burner chamber causing contamination
Solution Approach 1:
The patent extracts the burning function from a separate burner chamber and relocates both burners directly into the oven chamber. This extraction eliminates the communication interface between separate chambers, preventing food leftovers from migrating to a burner chamber while maintaining effective heated air circulation through the burners' direct positioning within the cooking space.
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 prevents contamination, enhances cleaning efficiency, maintains oven chamber capacity, and stabilizes the flame by ensuring proper air circulation and pressure management, reducing the risk of backfiring or extinguishment.
Implementation Method 1
a burner located within the burner cover to generate a flame
Implementation Method 2
the burner cover includes a first hole that provides a path through which air flows, and the frame is provided with a second hole in communication with the first hole, the second hole providing a path through which the air flows
Data Source
AI summary
A cooking device includes a frame forming a cooking chamber; a door opening and closing the cooking chamber; a burner cover disposed in the cooking chamber; and a burner located in the burner cover, the burner generating a flame, wherein the burner cover is provided with a first hole providing a path through which air flows, and the frame is provided with a second hole communicating with the first hole, the second hole providing a path through which the air flows.