Induction Oven Heating Element With Integrated Heat Exchanger

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Solution Overview

Problem

Existing induction furnace devices have inefficiencies in heat transfer and component design, leading to suboptimal cooking performance and increased space requirements.

Innovation Solution

The induction furnace device features a compact design with a heat exchanger unit that is integrally connected to the heating element, surrounded by a fan wheel, and an annular disk-shaped heating element, which enhances heat exchange efficiency and reduces space consumption by eliminating air gaps and additional components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If additional components are used for transferring heat from the heating element to the heat exchanger unit, then heat transfer functionality is achieved, but device complexity and space requirements increase

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidnumber of components

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The heat exchanger unit is integrally formed with the heating element as a single piece structure, eliminating the need for separate heat transfer components. This merging of functions directly reduces device complexity while maintaining effective heat transfer from the inductively heated element to the circulating air flow.

Inventive Principle:

Principle #5Merging (Combining)

2Loss of energy

If air gaps are maintained between the heating element and the heat exchanger unit, then thermal expansion is accommodated, but heat transfer efficiency decreases

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidthermal expansion accommodation

Core Design Contradiction:

Loss of energyVSStability of the object's composition

Solution Approach 1:

The integral one-piece construction eliminates air gaps between the heating element and heat exchanger unit, ensuring direct thermal contact and maximizing heat transfer efficiency while the unified structure accommodates thermal expansion internally.

Inventive Principle:

Principle #5Merging (Combining)

3Volume of moving object

If a compact design is implemented with integrally formed heating element and heat exchanger unit, then space requirements are reduced, but manufacturing complexity increases

Engineering Contradiction:

Improveinstallation spaceVSAvoidmanufacturing process

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The heating element and heat exchanger unit are formed as a single integrated component, which reduces installation space and eliminates the need for separate assemblies. The design achieves compactness while maintaining manufacturability through unified construction.

Inventive Principle:

Principle #5Merging (Combining)

4Volume of moving object

If the heating element is designed with annular disk shape, then space efficiency is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvespace consumptionVSAvoidgeometric precision

Core Design Contradiction:

Volume of moving objectVSManufacturing precision

Solution Approach 1:

The heating element is designed with an annular disk shape featuring curved surfaces and rounded contours rather than sharp edges. This geometric design improves space efficiency within the oven cavity while the curved surfaces are more tolerant to manufacturing variations compared to precise angular features.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 transfer efficiency, reduces installation space, and simplifies assembly, while maintaining high thermal energy output, thereby enhancing cooking performance and cost efficiency.

Implementation Method 1

at least one inductor of the induction furnace device initially converts the electrical energy into at least one alternating electromagnetic field, which is within at least one inductively heatable material, preferably within the Heating element, heat generated

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

the element is intended to generate heat through induced eddy currents and/or magnetic reversal effects when the alternating electromagnetic field generated by the inductor acts on the element

Methodology Applied

Scientific EffectEddy currents: Eddy Currents

Implementation Method 3

inductive heating" is intended to mean, in particular, a conversion of electrical energy into heat, in which at least one inductor of the induction furnace device initially converts the electrical energy into at least one alternating electromagnetic field

Methodology Applied

Scientific EffectInduction heating: Induction Heating

Implementation Method 4

at least one heat exchanger unit, which is intended for transferring heat from the heating element to a heating air flow

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 5

which is intended for transferring heat from the heating element to a heating air flow for heating a cooking space

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentEP3726930B1Induction heating device

Publication Date: 2023.12.13 BSH HAUSGERATE GMBH

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AI summary

To increase efficiency, an induction oven device (10a-c) is proposed with at least one inductively heated heating element (12a-c), with at least one inductor (28a-c) for heating the heating element (12a-c) and with at least one heat exchanger unit (14a-c) formed integrally with the heating element (12a-c) in an assembled state, which is provided for transferring heat from the heating element (12a-c) to a hot air flow for heating a cooking chamber (16a-c).