Bernoulli Filter Pressure Control for Fine-Pore Cleaning
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Solution Overview
Problem
Existing filter devices, particularly Bernoulli filter devices, are inadequate in cleaning filter elements with pore sizes below 100 µm, limiting their service life and functionality due to inadequate cleaning methods.
Innovation Solution
A filter device with a pressure-maintaining unit at the outlet maintains a defined minimum pressure during cleaning, creating a pressure difference that enhances the cleaning effect by promoting a backwash effect, allowing for the use of finer filter elements with pore sizes less than 100 µm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If filter elements with smaller pore sizes (increased filter fineness) are used, then filtering precision is improved, but cleaning effectiveness deteriorates because residues cannot be adequately removed
Solution Approach 1:
The invention changes the pressure parameter during cleaning by maintaining a defined minimum pressure in the housing using a pressure holding unit. This pressure parameter change creates a pressure difference between inside and outside of the filter element, enabling effective cleaning of fine-pored filter elements (pore size < 100 μm) that previously could not be adequately cleaned by conventional flow velocity methods alone
2Device complexity
If conventional cleaning methods (flow velocity increase only) are used, then device complexity is kept simple, but cleaning effectiveness deteriorates for filter elements with pore sizes below 100 μm
Solution Approach 1:
Instead of complicating the cleaning device structure, the invention changes the pressure parameter by adding a pressure holding unit at the outlet. This unit maintains a defined minimum pressure during cleaning, creating a pressure difference that enhances the backwash effect and enables effective cleaning of fine-pored filter elements while keeping the overall device structure relatively simple
3Manufacturing precision
If filter elements with increased filter fineness are used, then contaminant removal capability is improved, but service life deteriorates due to inadequate cleaning
Solution Approach 1:
The invention changes the pressure parameter during cleaning by maintaining a defined minimum pressure in the housing. This pressure difference creates an enhanced backwash effect that effectively removes residues from fine-pored filter elements, thereby extending their service life and enabling their use in applications requiring high filtering precision
Solution Approach 2:
The cleaning process uses the system's own fluid flow to clean the filter element. By maintaining pressure during cleaning, the system enables self-cleaning of the filter element through the pressure-driven backwash effect, eliminating the need for external cleaning equipment and extending service life
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 enhanced cleaning method effectively removes residues from filter elements with increased fineness, extending their service life and enabling reliable operation in applications with low volume flows.
Implementation Method 1
a pressure-maintaining unit (46) assigned to the outlet (16) for maintaining a defined minimum pressure in the housing (12) during cleaning
Implementation Method 2
Due to the cross-sectional constriction between the cleaning element and the inside of the filter element, an increased flow velocity is created on the inside of the filter element
Data Source
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AI summary
The invention relates to a filter device (10) for filtering a fluid, in particular a Bernoulli filter device (10), comprising a housing (12), an inlet (14) for introducing the fluid to be filtered into the housing (12), at least one filter element (20) arranged in the housing (12) for filtering the fluid, an outlet (16) for discharging the filtered fluid from the housing (12), and a filter cleaning device (30) for cleaning the filter element (20) of residues of the filtered fluid, wherein the outlet (16) for the filtered fluid on the housing (12) is assigned a pressure maintenance unit (46) for maintaining a defined minimum pressure (pmin) in the housing (12) during cleaning.