Burner and cooking appliance having burner
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Solution Overview
Problem
Conventional burners in cooking appliances face challenges such as interference with surrounding components, high manufacturing costs due to complex designs, incomplete combustion due to insufficient secondary air, and damage to cooking chamber coatings from overheating.
Innovation Solution
The proposed solution involves a burner design with a unique flame hole arrangement and a separate secondary air supply system, which ensures efficient combustion by providing sufficient secondary air and minimizing interference with other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If flame holes are arranged at opposite side portions of the burner to improve firepower and heating area, then the burner can heat a wider area in the cooking chamber, but the burner must be arranged at a central portion which causes interference with surrounding components and limits the structure and arrangement of components around it
Solution Approach 1:
The burner is designed with an asymmetric configuration where flame holes are concentrated at one end rather than distributed at opposite sides. This asymmetric arrangement allows the burner to be positioned at the rear of the cooking chamber without interfering with surrounding components, while still achieving effective heating through the strategic placement of flame holes at the forward end.
2Power
If flame holes are arranged in multiple columns to improve firepower, then combustion intensity increases, but the narrow interval among flame holes prevents sufficient secondary air supply causing incomplete combustion, increased flame length, yellow tip, soot and harmful gases generation
Solution Approach 1:
The flame holes are segmented into a specific pattern with adequate spacing between them, rather than densely packed in multiple columns. This segmentation allows sufficient secondary air to reach each flame hole, ensuring complete combustion while maintaining effective firepower. The spaced arrangement prevents the narrow interval problem that causes incomplete combustion.
3Productivity
If a convection fan is provided behind the burner to transfer heated air evenly throughout the cooking chamber, then air circulation improves, but the suctioned air causes the burner flame to face the rear wall surface leading to overheating and damage to the coating layer
Solution Approach 1:
The harmful effect of the convection fan's suction on the burner flame is extracted and addressed by positioning the burner at the rear of the cooking chamber, away from the fan's direct suction path. The flame holes are oriented to face forward toward the cooking chamber interior, separating the burner's heating function from the fan's air circulation function and preventing the flame from contacting the rear wall surface.
4Reliability
If a separate protecting means such as a burner reflector and stabilizer is provided to protect the wall surface from heat and stabilize the flame, then protection and stability are improved, but the number of components and manufacturing costs increase
Solution Approach 1:
The burner design integrates the protective and stabilizing functions into the burner structure itself. By positioning the burner at the rear with flame holes facing forward and configuring the flame hole arrangement to ensure adequate secondary air supply, the design achieves complete combustion (preventing soot and harmful gases) and proper flame direction without requiring separate burner reflectors or stabilizers, thus reducing component count while maintaining reliability.
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 combustion efficiency, reduces manufacturing costs, and prevents overheating of the cooking chamber, thereby improving the overall performance and reliability of the cooking appliance.
Implementation Method 1
a burner to heat food inside of the cooking chamber
Implementation Method 2
A convection fan may be provided behind the burner to transfer air heated by the burner evenly to the cooking chamber
Implementation Method 3
A convection fan may be provided behind the burner to transfer air heated by the burner evenly to the cooking chamber
Data Source
AI summary
A burner and a cooking appliance having a burner are provided. The burner may include a burner body having a gas flow path, and a flame hole portion open in the burner body. The flame hole portion may be connected to the gas flow path, and include a first flame hole array with multiple flame holes in a first direction, and include a second flame hole array spaced apart from the first flame hole array in a circumferential direction of the burner body. A pair of first array main flame holes may be repeatedly arranged in the first flame hole array. An auxiliary flame hole may be provided between the pair of first array main flame holes with a diameter smaller than a diameter of the main flame holes. The multiple flame hole arrays provide a high firepower to improve a heating efficiency of the burner.