Integrated Filter Housing with Bypass Element

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Solution Overview

Problem

Existing filter devices for marine engines and other applications face challenges with complex and costly installations, uneven thermal operating conditions, and limited adaptability to new fields of use, such as coolant filtration in machine tools.

Innovation Solution

A compact filter device design integrates a bypass filter element within a single cast steel housing, ensuring uniform thermal distribution and reducing installation space and costs, with a changeover device allowing for sequential backwashing and flexible filtration modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate filter devices and bypass filters are installed at different locations, then filtration function is provided, but installation space is increased and thermal operating conditions become uneven

Engineering Contradiction:

Improvefiltration functionVSAvoidinstallation space

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent combines the filter device and bypass filter into a single integrated housing unit. The filter element and bypass filter element are arranged side-by-side within the same housing, sharing common inlet and outlet connections. This merging eliminates the need for separate installation locations, reducing overall installation space while maintaining both filtration functions simultaneously.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If separate filter devices and bypass filters are installed at different locations, then filtration function is provided, but thermal operating conditions become uneven causing thermal stress

Engineering Contradiction:

Improvefiltration functionVSAvoidthermal stress

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

By integrating both the filter element and bypass filter element into a single housing with shared inlet and outlet ports, the patent ensures that hot or cold fluid enters the housing once and distributes uniformly to both filtering paths. This eliminates thermal gradients between separately located devices, preventing thermally induced stress cracks in the housing.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If conventional filter devices are used, then particle filtration is achieved, but installation and maintenance costs are high

Engineering Contradiction:

Improveparticle filtrationVSAvoidinstallation and maintenance costs

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The integrated design allows both the main filter element and bypass filter element to be serviced from a single installation location. The housing includes access points and internal arrangements that enable maintenance personnel to replace or clean either filter element without dismantling the entire system or accessing remote locations, thereby reducing installation and maintenance costs while maintaining reliable particle filtration.

Inventive Principle:

Principle #5Merging (Combining)

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 efficient particle filtration, reduces thermal stress, and lowers installation and maintenance costs, enabling the filter device to be used in various applications with high dirt loads and improving fluid treatment by maintaining uniform thermal conditions.

Implementation Method 1

a piston accumulator (56) for receiving a backwash fluid

Methodology Applied

Scientific EffectHydraulic accumulator: Hydraulic Accumulator

Implementation Method 2

passes the backwash fluid stored in the storage housing on to at least one filter element to be backwashed

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Implementation Method 3

a plurality of filter elements (34, 60) are accommodated in filter chambers (12, 14, 32) and are grouped around a backwash device

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Implementation Method 4

The filter elements each have an independent filter chamber, which form the filter housing as a whole... a uniform thermal heat distribution within the filter device having the bypass device is achieved

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS11235264B2Filter apparatus

Publication Date: 2022.02.01 HYDAC PROCESS TECH

AI summary

A filter device for cleaning particulate contaminants from a fluid flow, includes a plurality of filter elements (34, 60) accommodated in filter chambers (12, 14, 32) as components of a joint filter housing (10) and grouped around a backwash device (20) having a piston accumulator (56) for receiving a backwash fluid. In the storage housing (64) of the piston accumulator, a piston (57) is guided in a longitudinally movable manner, is controlled by a pressure medium, and passes on the backwash fluid stored in the storage housing (64) on to at least one filter element (60) to be backwashed for cleaning purposes via a backwash device (20). The backwash device also discharges the backwash fluid from the filter device. A specific filter element as a bypass filter element (34) is selected from the plurality of filter elements (34, 60), and exclusively removes particles after a changeover device (18) has been actuated, while the other filter elements (60) are excluded from this removal process.