Self-Fixing Filter Housing for Air-Circulating Roaster Odor Control

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Solution Overview

Problem

Existing air-circulating electric roasters face issues with fine odors being emitted to the outside and internal contamination due to oil molecules adhering to the intake passage and fan, necessitating frequent cleaning and the use of fixing parts for porous material members.

Innovation Solution

A filter member housing with a first and second member that can be easily attached and detached in a narrow space, self-fixed without a fixing part, using protrusions and grooves for secure attachment and elastic recovery to accommodate a filter member, effectively attenuating oil and odors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a porous material member is used alone to attenuate odors and oil, then it is easy to insert into narrow space, but it requires a fixing part to secure it and requires direct contact with contaminated material for cleaning

Engineering Contradiction:
Improveease of insertionVSAvoidfixing part requirement
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The porous material member is nested within a housing structure that fits into the narrow space. The housing contains the porous material and provides the fixing function, eliminating the need for separate fixing parts while maintaining ease of insertion into the confined space.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The housing acts as an intermediary between the porous material member and the installation space. It provides the fixing function and protects from contamination, while the porous material focuses on odor and oil attenuation without requiring direct contact for cleaning.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If the size of the housing is made sufficiently small to facilitate insertion into narrow spaces, then ease of insertion is improved, but a fixing part is still required to secure it

Engineering Contradiction:
Improveease of insertionVSAvoidfixing part requirement
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The fixing function is merged into the housing structure itself through self-fixing mechanisms such as elastic members or interference fits between housing components. This eliminates the need for separate fixing parts while maintaining the compact size necessary for narrow space insertion.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The housing incorporates self-fixing features that automatically secure it in place upon insertion. Elastic members or snap-fit mechanisms engage automatically when the housing is installed, providing fixation without requiring additional fixing parts or complex assembly steps.

Inventive Principle:
Principle #25Self-service

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 solution provides a filter member housing that is easy to install and remove, self-fixed without a separate fixing part, effectively minimizing contamination and odor emission in air-circulating electric roasters.

Implementation Method 1

when pressure is applied in the second direction to the first member relative to the second member or to the second member relative to the first member, the protrusion moves along the groove toward a second end of the groove, and when the pressure is released, the protrusion returns to the first end of the groove by elastic recovery of the filter member, thereby being fixed in the groove

Methodology Applied
Scientific EffectElastic recovery: Elasticity

Implementation Method 2

a porous material member is inserted into a narrow side space and fixed by a predetermined fixing part. When used alone, a porous material member is easy to insert into a narrow space, but it requires a fixing part to fix it, and when oil molecules are adsorbed and contaminated

Methodology Applied
Scientific EffectAdsorption: Adsorption

Data Source

PatentEP4691327A1Filter housing and air-circulating electric roaster including same
Publication Date: 2026.02.11 DNW
  • EP4691327A1 patent drawingFigure 1
  • EP4691327A1 patent drawingFigure 2
  • EP4691327A1 patent drawingFigure 3

AI summary

A filter member housing includes a first member having a first opening at a first side along a first direction and a first space for accommodating a first side of a filter member, and a second member having a second opening at the first side for receiving the first side of the first member and a second space for accommodating a second side of the filter member and the first side of the first member. A portion of the first side of the first member is inserted into the first side of the second member, so that the filter member is received within a space defined by the first and second spaces. When a protrusion on the first member engages a groove on the second member, the protrusion is positioned at a first end of the groove by the elastic force of the filter member. Applying pressure moves the protrusion along the groove to a second end, and releasing pressure allows the protrusion to return to the first end by the elastic force, thereby securing the filter member in place.