Filter Device Barrier Unit for Diesel Water Separation
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Solution Overview
Problem
Existing filter devices for fluids contaminated with water, such as diesel oil, face inefficiencies in water separation due to incomplete utilization of the filter surface when pressure differences cause the fluid level in the filter housing to be below the entire filter medium, leading to impaired operation of downstream systems.
Innovation Solution
The filter device incorporates a barrier device integrated into the filter element, with its upper end cap supported on the filter housing cover, ensuring the fluid flows through the entire filter surface by maintaining a predetermined fill level, utilizing an overflow pipe to set the fluid level and ensuring the hydrophobic sieve is fully immersed for enhanced water separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fluid outlet is positioned at the lower end of the main housing part, then the device structure is simplified, but the fill level cannot be maintained high enough to immerse the entire filter medium
Solution Approach 1:
A barrier device is introduced as an intermediary element between the fluid outlet and the filter medium. This barrier device includes a tube that extends upward from the fluid outlet, creating a virtual outlet position higher than the actual outlet. The tube acts as a mediator that allows the fluid to exit at the lower position while maintaining a high fill level that immerses the entire filter medium, thus resolving the contradiction between simplified structure and separation efficiency
2Device complexity
If the filter housing is not completely vented, then the device structure is simplified, but the fluid level drops below the filter medium causing dry areas
Solution Approach 1:
The barrier device serves as a mediator that decouples the venting requirement from the fill level maintenance. By positioning the barrier device tube to extend above the filter medium while the actual fluid outlet remains at the lower end, the system maintains high fill level without requiring complex venting structures, ensuring complete filter surface utilization
3Device complexity
If the fluid outlet is positioned below the filter medium upper end, then the device structure is simplified, but the entire filter surface cannot be utilized
Solution Approach 1:
The barrier device tube acts as a mediator that creates a virtual outlet position. The tube extends upward from the actual lower outlet position to a height that corresponds to the filter medium upper end or higher. This allows the fluid to effectively 'exit' at the virtual position, maintaining the fill level necessary to immerse the entire filter medium, while the actual outlet remains at the simplified lower position
Solution Approach 2:
The solution transitions from a two-dimensional problem (outlet position in the housing) to a three-dimensional solution by introducing a vertical tube structure. The tube adds a vertical dimension that allows the outlet to function at an elevated virtual position while physically remaining at the lower position, thereby maintaining both structural simplicity and full filter surface utilization
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 configuration ensures the entire filter surface is utilized for efficient water separation, maintaining operational reliability and effectiveness even when the fluid outlet is positioned below the filter medium's upper end, preventing 'dry' areas and ensuring safe operation of downstream systems.
Implementation Method 1
a barrier device is connected upstream of the fluid outlet in such a way that there is an increase in the fill level in the housing, so that the fluid can flow through the filter element immersed in the fluid volume
Implementation Method 2
The separation of water fractions carried along in the fuel can be brought about by a coagulation process in which water droplets are formed on the filter medium
Implementation Method 3
a hydrophobic sieve is arranged between the water carried along with a diesel oil and the tube that a separation space is formed between this and the filter medium
Data Source
AI summary
The invention relates to a filter device, in particular for fluids polluted with water admixtures, such as diesel oil, comprising a filter housing (1), which has a fluid inlet (29) and a fluid outlet (31) for purified fluid and in which at least one filter element (5) can be received, which separates an untreated side (33) from a treated side (45)with the effective filter surface thereof during the filtering process in the filter housing (1), wherein during the filter operation a respective fill level of the fluid develops inside the filter housing (1), said level delimiting a fluid volume into which the filter element (5) is immersed, characterized in that a barrier unit (63) is connected upstream of the fluid outlet (31) of the filter housing (1) such that the fill level in the housing (1) is increased and therefore the fluid can flow through the filter element (5) immersed in the fluid volume over an enlarged filter surface.