Rear Burner Assembly Layout for Clean, Stable Oven Heating
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Solution Overview
Problem
Existing cooking devices with burners installed under the oven chamber face issues such as contamination from food leftovers, difficulty in cleaning, reduced cavity capacity, and flame backfire or extinguishment due to pressure changes when the oven door is opened and closed.
Innovation Solution
A cooking device design featuring a burner assembly installed at the rear wall of the frame, with a combustion chamber and air flow paths through strategically positioned holes, including a fan and nozzle holder to manage air flow and pressure, preventing foreign substances from entering and ensuring efficient air circulation and flame stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the burner chamber is provided under the oven chamber to enable convective heating, then heating efficiency is improved, but food leftovers can enter the burner chamber causing contamination
Solution Approach 1:
The burner assembly is segmented into a burner chamber and a separate housing structure. The housing includes a bottom wall that extends forward of the oven chamber rear wall, creating a physical barrier that prevents food leftovers from entering the burner chamber while maintaining the convective heating function through dedicated air flow paths.
2Productivity
If the burner chamber is provided under the oven chamber, then convective heating is achieved, but cleaning becomes difficult due to the opening in the bottom surface
Solution Approach 1:
The burner assembly is designed as a separate, removable unit housed within a dedicated housing. This segmentation allows the burner assembly to be easily removed for cleaning without disassembling the entire oven structure, while the housing bottom wall maintains the structural integrity needed for convective heating.
Solution Approach 2:
A fan is introduced as an intermediary component to manage air flow between the oven chamber and burner chamber. The fan creates controlled air circulation that enables convective heating while preventing uncontrolled access that would complicate cleaning, thus mediating between the heating requirement and cleaning ease.
3Device complexity
If the lower burner is installed under the oven chamber, then space utilization is improved, but the cavity capacity is reduced by the burner installation space
Solution Approach 1:
The burner assembly is positioned in the rear horizontal dimension of the oven rather than occupying vertical space within the cooking cavity. The burner chamber is located at the rear of the oven chamber with its bottom wall extending forward, utilizing the horizontal space behind the cooking area to maintain full cavity capacity while achieving compact space utilization.
4Ease of operation
If the oven door is opened and closed during burner operation, then pressure changes cause flame backfire or extinguishment
Solution Approach 1:
A fan is introduced as an intermediary to actively manage air flow and pressure balance between the oven chamber and burner chamber. The fan compensates for pressure changes caused by door opening/closing, maintaining stable combustion conditions and preventing flame backfire or extinguishment while allowing flexible door operation.
Solution Approach 2:
The system actively changes the air flow parameter through fan operation to compensate for pressure variations. By adjusting fan speed and air flow rate in response to door position changes, the system maintains stable combustion pressure and prevents flame instability during door operation.
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 enhances cleanliness, maintains cavity capacity, and prevents flame backfire or extinguishment by managing air flow and pressure effectively, ensuring efficient cooking and reduced contamination.
Implementation Method 1
a burner located in the burner cover to generate a flame
Implementation Method 2
a fan disposed between the burner cover and the frame
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A cooking device (1) includes a frame (21) forming a cooking chamber (22); a door (25) opening and closing the cooking chamber (22); a burner cover (140, 160) disposed in the cooking chamber (22); and a burner (110) located in the burner cover (140, 160), the burner (110) generating a flame, wherein the burner cover (140, 160) is provided with a first hole (172) providing a path through which air flows, and the frame (21) is provided with a second hole (36) communicating with the first hole (172), the second hole (36) providing a path through which the air flows.