Method of using high temperature filter for edible cooking oil

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Solution Overview

Problem

Existing filters for edible cooking oil in deep fat fryers are not effective at high temperatures, as they degrade or become blinded, leading to reduced filtration efficiency and increased oil discard.

Innovation Solution

A filter made from non-woven polyphenylene sulfide (PPS) material with randomly oriented fibers, capable of filtering particulate down to 0.5 microns at temperatures up to 425°F, and designed for extended use with minimal oil absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional filters (cellulose, rayon, stainless steel mesh) are used for filtering cooking oil, then particulate removal is achieved, but the filters degrade or become blinded at high temperatures (250-425°F), reducing filtration efficiency and requiring frequent replacement

Engineering Contradiction:

Improvefilter durability at high temperatureVSAvoidfilter lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent changes the material parameter of the filter from conventional cellulose/rayon/stainless steel to polyphenylene sulfide (PPS) fabric, which has inherently higher temperature resistance. This material parameter change enables the filter to maintain its structural integrity and filtration capability at cooking temperatures up to 425°F, resolving the contradiction between reliability and duration of action.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite structure combining PPS fabric with an adhesive coating and filter media layer. This composite material approach creates a filter that leverages the heat resistance of PPS while incorporating effective filtration layers, achieving both high-temperature durability and sustained filtration performance over extended periods.

Inventive Principle:

Principle #40Composite materials

2Productivity

If filters operate at high cooking temperatures (250-425°F) for extended periods, then continuous filtration is maintained, but the filters become blinded with particulate and degrade, leading to increased oil discard

Engineering Contradiction:

Improvecontinuous filtration capabilityVSAvoidoil discard

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

By changing the filter material to PPS fabric with inherent high-temperature stability, the filter maintains its porosity and filtration efficiency even after prolonged exposure to cooking temperatures and particulate-laden oil. This prevents filter blinding and degradation, enabling continuous productivity without increasing oil discard due to filter failure.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent effectively replaces the disposable nature of conventional filters with a durable, reusable PPS-based filter. Instead of frequent replacements that lead to oil discard, the PPS filter provides long-term continuous service, transforming the filter from a short-lived consumable to a sustained productivity enabler.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Quantity of substance

If conventional filter materials (cellulose, rayon) are used, then filtration is achieved, but the filters absorb significant amounts of oil (15-20 times dry filter weight), increasing oil discard

Engineering Contradiction:

Improveparticulate retentionVSAvoidoil absorption by filter

Core Design Contradiction:

Quantity of substanceVSLoss of substance

Solution Approach 1:

The patent changes the chemical and physical parameters of the filter material from hydrophilic cellulose/rayon to hydrophobic PPS fabric. This parameter change fundamentally alters the oil interaction characteristics, reducing oil absorption from 15-20 times dry weight to minimal levels, while maintaining effective particulate retention through the PPS structure and adhesive-coated filter media.

Inventive Principle:

Principle #35Parameter changes

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 filter maintains high filtration efficiency for up to 30 days at temperatures below 375°F and up to 4 hours at 425°F, significantly reducing oil discard and extending the filter's lifespan.

Implementation Method 1

a filter made from non-woven polyphenylene sulfide (PPS) material with randomly oriented fibers, capable of filtering particulate down to 0.5 microns

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Implementation Method 2

The filter maintains high filtration efficiency for up to 30 days at temperatures below 375°F and up to 4 hours at 425°F

Methodology Applied

Scientific EffectThermal stability: Heat Treatment

Data Source

PatentUS12324540B2Method of using high temperature filter for edible cooking oil

Publication Date: 2025.06.10 WS HLDG LLC

AI summary

A method for filtering particulate down to 0.5 micron from cooking oil at a filtration temperature of up to 425° Fahrenheit is provided. The method includes providing a filter having a non-woven panel of randomly oriented fibers of polyphenylene sulfide (PPS) material and exposing the filter to the oil for a period of time while applying a pressure or vacuum to move the oil through the filter for filtering particulate from the cooking oil.