Oven Burner Cover Airflow Layout for Stable Flame and Cleanliness

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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 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, a burner cover with specific holes for air flow, and a fan system to manage air circulation, preventing foreign materials from entering the burner area and maintaining stable pressure within the oven chamber.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the burner chamber is provided below the oven chamber to enable convective heating, then heating efficiency is improved, but food leftovers can enter the burner chamber through the open bottom surface causing contamination

Engineering Contradiction:

Improveheating efficiencyVSAvoidcontamination from food leftovers

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent divides the cooking device into separate functional chambers: the oven chamber for cooking food and the burner chamber for combustion. By positioning the burner chamber below the oven chamber and providing proper sealing, the design maintains convective heating efficiency while preventing food leftovers from contaminating the burner area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary sealing structure at the interface between the oven chamber and burner chamber. This sealing mechanism acts as a barrier that allows thermal energy transfer while preventing contamination from food particles entering the burner chamber.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If the burner chamber is provided below the oven chamber, then convective heating is achieved, but the oven chamber becomes more difficult to clean due to the open bottom surface

Engineering Contradiction:

Improveconvective heating capabilityVSAvoidcleaning ease

Core Design Contradiction:

Use of energy by moving objectVSEase of operation

Solution Approach 1:

The patent segments the cooking device into distinct chambers with the burner chamber positioned below the oven chamber. This segmentation allows the oven chamber to be sealed at the bottom, making it easier to clean while maintaining convective heating through the structured air flow paths between the chambers.

Inventive Principle:

Principle #1Segmentation

3Use of energy by moving object

If the lower burner is installed below the oven chamber, then heating function is provided, but the cavity capacity of the oven chamber is reduced by the burner insulation space

Engineering Contradiction:

Improveheating functionVSAvoidoven chamber capacity

Core Design Contradiction:

Use of energy by moving objectVSVolume of stationary object

Solution Approach 1:

The patent relocates the burner chamber to a vertical dimension below the oven chamber rather than occupying horizontal space within the oven chamber. This dimensional arrangement allows the oven chamber to maintain its full cavity capacity while the burner chamber provides necessary insulation and heating functions in the vertical space below.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Ease of operation

If the oven door is opened and closed while mixed gas is burning in the lower burner, then access to the oven chamber is provided, but pressure changes cause backfiring or extinguishment of the flame

Engineering Contradiction:

Improvedoor accessVSAvoidflame stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces pressure regulation mechanisms and sealed interfaces as intermediaries between the oven chamber and burner chamber. These intermediaries buffer pressure changes caused by door operations, preventing direct pressure fluctuations from affecting the flame stability in the burner chamber.

Inventive Principle:

Principle #24Intermediary (Mediator)

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, increases oven chamber capacity, and prevents flame instability by ensuring air flow and pressure management, reducing contamination and maintaining a stable flame.

Implementation Method 1

a burner located within the burner cover to generate a flame

Methodology Applied

Scientific EffectCombustion: Combustion

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

Methodology Applied

Scientific EffectAir flow:

Data Source

PatentUS10422537B2Cooking device

Publication Date: 2019.09.24 LG ELECTRONICS INC

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.