Cooking Appliance Lid Filtration Layout for Clean Filter Removal

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Solution Overview

Problem

Existing household electric cooking appliance lids with filtration subassemblies are obstructed by fatty deposits on gripping means, making it difficult to remove the filtration subassembly after cooking, especially in fryers, due to their placement at the entry of the cooking fumes channel.

Innovation Solution

The filtration subassembly is mounted in an opening of the lower face at the outer periphery of the seal, positioned away from cooking fumes, allowing for a cleaner and easier removal, with a curved design to reduce height and facilitate filtration, and a pivotally mounted lid with a viewing window to reduce deposits and enhance ergonomics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the filtration subassembly is arranged at the entry of the channel, then the filtration effectiveness is improved, but the gripping means is exposed to cooking fumes causing fatty deposits that make handling difficult

Engineering Contradiction:

Improvefiltration effectivenessVSAvoidhandling of gripping means

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The lid is divided into distinct functional zones: the filtration subassembly is positioned in the lower face away from the channel entry, separating the gripping area from the fume exposure zone. This segmentation allows the filtration function to remain effective while the gripping means stays clean and easy to handle.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The channel structure acts as an intermediary element that guides cooking fumes from the tank through the filtration subassembly located in the lower face, to the upper face exit. This intermediary pathway allows the filtration subassembly to be positioned away from the fume source while still effectively filtering the vapors.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the filtration subassembly is positioned at the channel entry, then the filtration function is optimized, but the outer face of the lid requires frequent cleaning due to exposure to cooking fumes

Engineering Contradiction:

Improvefiltration functionVSAvoidcleaning of outer face

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The filtration subassembly is extracted from its traditional position at the channel entry and relocated to the lower face of the lid at the outer periphery of the seal. This extraction removes the filtration component from the fume exposure zone, keeping the outer face clean and reducing maintenance requirements.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The filtration subassembly is positioned in the lower face plane rather than at the channel entry point, utilizing the vertical dimension and lateral space of the lid structure. This dimensional repositioning allows the filtration function to be maintained while the outer surface remains clean.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Length of stationary object

If the lid height is reduced, then the appliance compactness is improved, but the filtration surface area may be reduced

Engineering Contradiction:

Improvelid heightVSAvoidfiltration surface area

Core Design Contradiction:

Length of stationary objectVSArea of stationary object

Solution Approach 1:

The filtration subassembly incorporates a curved filtration surface that provides increased filtration area within a compact vertical profile. The curved geometry allows the filtration surface to extend radially rather than vertically, maintaining effective filtration area while reducing the overall lid height.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The filtration surface is extended in the radial and lateral dimensions rather than vertically. By positioning the subassembly in the lower face and utilizing curved geometry, the filtration area is maximized in the horizontal plane, allowing reduced lid height without sacrificing filtration effectiveness.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 improves ergonomics and filtration effectiveness by preventing fume exposure to the gripping area, simplifying cleaning and filter replacement, while reducing the lid's height and enhancing user comfort and safety.

Implementation Method 1

a removable filtration subassembly extending across the flue

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Data Source

PatentUS8381637B2Household electric appliance lid having a filtration subassembly

Publication Date: 2013.02.26 SEB SA

AI summary

A lid for a household electric cooking appliance, the lid having: a lower face; an upper face; a flue extending between the upper face and the lower face for evacuating cooking fumes and having an entry and an exit; a seal carried by the lower face and surrounding the entry of the flue, the seal having a periphery; and a removable filtration subassembly extending across the flue, wherein the filtration subassembly is mounted in an opening of the lower face outside the periphery of the seal. A household electric appliance composed of: the lid described above, and a tank having an upper edge, wherein the seal of the lid is provided to cooperate with the upper edge of the tank.