Dual-Wall Cooking Vessel With Conductive Cladding and Insulating Gap

Solution Overview

Problem

Existing hollow wall cooking vessels compromise cooking performance due to non-conductive sidewalls, which primarily serve for insulation, leading to uneven heating and potential damage from heating elements or flames.

Innovation Solution

A dual wall cooking vessel with a sealed insulating gap between interior and exterior walls, where the interior wall features a laminated thermally conductive layer facing the gap, allowing efficient heat transfer during cooking while minimizing heat loss post-cooking, formed by deep drawing and reverse rolling of metal sheets to create a unitary bottom and integrated rim.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If hollow wall cooking vessels use non-conductive sidewalls for insulation, then heat retention is improved, but cooking performance deteriorates due to uneven heating

Engineering Contradiction:

Improveheat retentionVSAvoidcooking performance

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent applies local quality by making different portions of the sidewall structure have different thermal properties. The interior wall includes a thermally conductive layer (aluminum or copper) that faces the insulating gap, while the exterior wall remains thermally insulating. This localized thermal conductivity enhancement at the cooking surface resolves the contradiction by enabling efficient heat transfer where needed (cooking performance) while maintaining insulation where required (heat retention).

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs composite materials by combining thermally conductive materials (aluminum, copper) with thermally insulating materials in a multi-layer sidewall structure. The interior wall is constructed with a conductive layer bonded to an insulating layer, creating a composite structure that simultaneously achieves both efficient heat distribution during cooking and effective heat retention after cooking, thereby resolving the performance contradiction.

Inventive Principle:

Principle #40Composite materials

2Temperature

If hollow wall cooking vessels use non-conductive sidewalls for insulation, then thermal insulation is improved, but uniform heating deteriorates

Engineering Contradiction:

Improvethermal insulationVSAvoiduniform heating

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The patent applies local quality by making different portions of the sidewall structure have different thermal properties. The interior wall includes a thermally conductive layer (aluminum or copper) that faces the insulating gap, while the exterior wall remains thermally insulating. This localized thermal conductivity enhancement at the cooking surface resolves the contradiction by enabling efficient heat transfer where needed (cooking performance) while maintaining insulation where required (heat retention).

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs composite materials by combining thermally conductive materials (aluminum, copper) with thermally insulating materials in a multi-layer sidewall structure. The interior wall is constructed with a conductive layer bonded to an insulating layer, creating a composite structure that simultaneously achieves both efficient heat distribution during cooking and effective heat retention after cooking, thereby resolving the performance contradiction.

Inventive Principle:

Principle #40Composite materials

3Loss of energy

If hollow wall cooking vessels use non-conductive sidewalls for insulation, then heat retention is improved, but protection from heating elements deteriorates

Engineering Contradiction:

Improveheat retentionVSAvoiddamage from heating elements

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

The patent applies the intermediary principle by introducing a substantial mass of thermally conductive material (aluminum or copper) in the lower portion of the sidewalls between the heating element and the cookware contents. This intermediary layer absorbs and distributes the intense heat from the heating element or flame, preventing direct damage to the cookware while also preventing localized overheating of the food, thus resolving the contradiction between heat retention and protection from harmful thermal effects.

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

The dual wall design ensures uniform heating and retention of temperature, enhancing cooking performance and preventing damage from heating elements, while maintaining insulation without the need for welding.

Implementation Method 1

the interior wall is a laminated structure with a substantially thermally conductive laminated layer facing the sealed insulating gap

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

dual wall cooking vessel having a sealed insulating gap between the interior and exterior wall

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 3

formed by deep drawing and reverse rolling of metal sheets to create a unitary bottom and integrated rim

Methodology Applied

Scientific EffectPlastic deformation: Plasticity

Data Source

PatentUS7913372B2Insulated cooking vessel

Publication Date: 2011.03.29 MEYER INTELLECTUAL PROPERTIES LIMITED

AI summary

A dual wall cooking vessel has an inner cooking portion or shell with a thermally conductive outer cladding that terminates prior to the interior of the rim of the cooking vessel. The construction provides uniform temperature during the cooking process, yet minimizes heat loss after cooking.