Induction Cooktop Thermal Distribution Layout for Mounting Plate Stress

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Solution Overview

Problem

Existing cooking systems face issues with heat distribution, leading to thermal and mechanical stresses on the mounting plate, which can result in cracking, rupture, and reduced service life, along with potential safety hazards from splintering.

Innovation Solution

A cooking system with a thermal distribution unit having distinct thermal resistances in different regions, where the first region is thermally conductive and connected to the mounting plate with low resistance, while the second region is thermally insulated, and a third region discharges heat to reduce mechanical stresses, using a heat transfer element to ensure efficient heat transfer and fixation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If a conventional heating system is used with uniform thermal resistance, then the heating function is simple and device complexity is low, but thermal gradients cause mechanical stresses leading to cracking and reduced service life

Engineering Contradiction:

Improveservice life of mounting plateVSAvoidcomplexity of thermal distribution unit

Core Design Contradiction:

Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

The thermal distribution unit is divided into multiple regions with different thermal resistance values. The first region has a first thermal resistance value and the second region has a second thermal resistance value, creating a segmented thermal management system that addresses different thermal requirements in different areas of the mounting plate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the thermal distribution unit are assigned different thermal resistance properties based on local thermal requirements. The first region with first thermal resistance and second region with second thermal resistance provide localized thermal control to reduce temperature gradients specifically where they cause mechanical stress.

Inventive Principle:

Principle #3Local quality

2Reliability

If thermal distribution unit with multiple thermal resistance regions is implemented, then heat distribution is improved and thermal stresses are reduced, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvethermal and mechanical stress resistanceVSAvoidstructure of thermal distribution unit

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The thermal distribution unit is constructed as a composite structure with multiple regions having different thermal resistance values. This composite design allows the unit to provide both thermal management functions and structural support, improving reliability while managing complexity through integrated design.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If uniform thermal resistance is used throughout the thermal distribution unit, then manufacturing is simpler and cost is lower, but temperature gradients cause mounting plate cracking and safety hazards

Engineering Contradiction:

Improvethermal and mechanical stresses on mounting plateVSAvoidmanufacturing of thermal distribution unit

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The thermal distribution unit is segmented into regions with different thermal resistance values to specifically address and reduce temperature gradients in areas where they cause harmful thermal and mechanical stresses on the mounting plate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different thermal resistance properties are applied locally in different regions of the thermal distribution unit where temperature gradients and resulting mechanical stresses are most problematic, providing targeted stress reduction without requiring complex manufacturing throughout the entire structure.

Inventive Principle:

Principle #3Local quality

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 configuration improves heat distribution, reduces thermal and mechanical stresses, extends the service life of the mounting plate, prevents cracking and rupture, and minimizes the risk of injury from splintering, while maintaining cost efficiency and durability.

Implementation Method 1

at least one thermal distribution unit (14) which is provided for distributing heat

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20240035672A1Cooking system and method for installing a cooking system

Publication Date: 2024.02.01 BSH HAUSGERATE GMBH

AI summary

A cooking system, in particular an induction cooking system, includes a mounting plate, and a thermal distribution unit designed to distribute heat and including a first region having a first thermal resistance to the mounting plate, and a second region having a second thermal resistance to the mounting plate, with the second thermal resistance substantially deviating from the first thermal resistance.