Parallel Filter Module Sensor Segmentation for Individual Element Monitoring

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Solution Overview

Problem

In filter modules with multiple parallel filter elements, global pressure loss measurements fail to accurately determine the state of individual elements, leading to inefficient maintenance and potential contamination of raw gas-side measuring points, resulting in suboptimal energy use and increased costs.

Innovation Solution

Each filter element is equipped with a sensor to measure its loading state, using flow sensors to determine the flow velocity, quantity, or mass of fluid, allowing for precise monitoring of individual filter elements and preventing contamination by positioning sensors on the clean gas side.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple filter elements are arranged in parallel to increase cleaning capacity, then the volume of cleaned air increases, but the influence of individual filter element state on overall pressure loss measurement decreases

Engineering Contradiction:
Improvevolume of cleaned airVSAvoiddetection of individual filter element state
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The patent divides the monitoring function by assigning individual sensors to each filter element. Instead of one global pressure loss measurement for the entire filter module, each filter element has its own sensor that independently monitors its loading state, enabling precise detection of individual element conditions even in parallel arrangements with multiple elements.

Inventive Principle:
Principle #1Segmentation

2Device complexity

If global pressure loss measurement is used to monitor filter module state, then the measurement system is simple, but individual filter element states cannot be determined accurately

Engineering Contradiction:
Improvemeasurement system structureVSAvoidindividual filter element state detection
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

The monitoring system is segmented into independent measurement units, with each filter element having its own sensor. This segmentation allows the system to maintain simplicity at the individual element level while achieving precise monitoring of each element's state, avoiding the need for complex centralized measurement systems.

Inventive Principle:
Principle #1Segmentation

3Measurement precision

If raw gas-side measuring point is used for pressure difference measurement, then the measurement is direct, but the measuring point is susceptible to contamination

Engineering Contradiction:
Improvepressure difference measurementVSAvoidcontamination of measuring point
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent uses the filter element itself as an intermediary between the raw gas environment and the sensor. The sensor is positioned on the clean gas side of the filter element, and the filter element's structure serves as a protective barrier that transmits the necessary mechanical information (loading state, pressure differences) to the sensor while blocking contamination particles from reaching the sensor.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Reliability

If filter elements are cleaned or replaced prophylactically, then contamination risk is reduced, but energy consumption increases and costs rise

Engineering Contradiction:
Improvefilter element performanceVSAvoidenergy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements a feedback-based monitoring system where individual sensors continuously measure the loading state of each filter element and provide this information to a control unit. The control unit processes this data and provides feedback signals that trigger maintenance actions only when actually needed, replacing prophylactic cleaning with condition-based maintenance that optimizes energy consumption and costs.

Inventive Principle:
Principle #23Feedback

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

Enables timely and targeted maintenance of individual filter elements, optimizing energy use and reducing costs by providing accurate state information for each element, thus improving the overall performance of the filter module.

Implementation Method 1

each sensor comprises a flow sensor

Methodology Applied
Scientific EffectFlow measurement:

Data Source

PatentUS11865482B2Filter module comprising sensor and method for determining the state of a filter element
Publication Date: 2024.01.09 CARL FREUDENBERG KG
  • US11865482B2 patent drawing
  • US11865482B2 patent drawing
  • US11865482B2 patent drawing

AI summary

A filter module for filtering a fluid flow includes: a plurality of filter elements arranged parallel to one another in a fluid channel. A sensor is mounted on each filter element of the plurality of filter elements, each sensor being determining a loading state of a corresponding filter element. Each of the plurality of filter elements is a filter cartridge including plated filter medium. Each sensor is a flow sensor.