Domestic appliance device

Solution Overview

Problem

Existing oven devices face challenges with insulation deformation due to thermal heating, which can disrupt the optimal arrangement of induction heating cables and affect cooking performance and safety.

Innovation Solution

A household appliance device with an insulation unit that incorporates a placement assist element to tailor its shape to the oven muffle and an expansion compensation element to manage thermal expansion, ensuring optimal electrical and thermal insulation and preventing deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the insulation unit is arranged flat on the muffle wall to provide electrical and thermal insulation, then insulation efficiency is improved, but the insulation unit undergoes deformation under thermal heating which adversely affects the arrangement of the induction heating cable

Engineering Contradiction:

Improveinsulation efficiencyVSAvoidshape stability of insulation unit

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The insulation unit is divided into multiple independent insulation segments that can expand independently. Each segment contains expansion compensation elements that allow localized thermal expansion without deforming the entire insulation unit, thereby maintaining the overall flat arrangement and optimal heating cable positioning while accommodating thermal growth.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The insulation unit incorporates expansion compensation elements that change their physical parameters (length, volume) in response to temperature changes. These elements are designed to expand when heated, absorbing the thermal expansion stress and preventing deformation of the insulation unit's overall shape and arrangement.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the insulation unit is made rigid to maintain its shape and insulation properties, then insulation performance is improved, but the insulation unit cannot accommodate thermal expansion which leads to deformation

Engineering Contradiction:

Improveinsulation performanceVSAvoidthermal expansion adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The insulation unit is divided into multiple independent insulation segments that can expand independently. Each segment contains expansion compensation elements that allow localized thermal expansion without deforming the entire insulation unit, thereby maintaining the overall flat arrangement and optimal heating cable positioning while accommodating thermal growth.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The insulation unit transitions from a completely rigid structure to a dynamic structure with movable expansion compensation elements. These elements can adjust their configuration in response to thermal conditions, allowing the insulation unit to adapt its shape and volume while maintaining insulation performance during cooking operations.

Inventive Principle:

Principle #15Dynamics

3Productivity

If the insulation unit is designed to fit precisely on the muffle wall to ensure optimal heating cable arrangement, then heating performance is improved, but any thermal deformation disrupts this precise arrangement

Engineering Contradiction:

Improveheating performanceVSAvoidarrangement stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The insulation unit is divided into multiple independent insulation segments that can expand independently. Each segment contains expansion compensation elements that allow localized thermal expansion without deforming the entire insulation unit, thereby maintaining the overall flat arrangement and optimal heating cable positioning while accommodating thermal growth.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The expansion compensation elements are pre-configured within the insulation segments to activate when thermal expansion occurs. These elements are designed in advance to counteract the forces that would cause deformation, ensuring that the insulation unit maintains its precise arrangement on the muffle wall even during high-temperature cooking operations.

Inventive Principle:

Principle #10Preliminary action

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 maintains the optimal arrangement of heating units, enhances insulation efficiency, and ensures durable operation even at high temperatures, reducing the risk of electrical short circuits and heat transfer.

Implementation Method 1

there is a risk that the insulation unit will undergo deformation, which could adversely affect the optimal arrangement of the induction heating cable arranged above the insulation unit relative to the muffle

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS11852352B2Domestic appliance device

Publication Date: 2023.12.26 BSH HAUSGERATE GMBH

AI summary

A household appliance device includes a first structural unit, a second structural unit, and an insulation unit configured to provide an insulation between the first and second structural units. The insulation unit includes a placement assist element configured to tailor an exterior shape of the insulation unit to the first structural unit for placement of the insulation unit, and an expansion compensation element configured to compensate at least substantially a thermal expansion of at least one subregion of the insulation unit.