Venturi Elements With Extended Pulse Outlets Reduce Pressure Drop
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Solution Overview
Problem
Conventional air filtering systems face challenges in maintaining efficient airflow and effective particulate matter collection due to the design of venturi elements, which can lead to increased pressure drop and reduced flow velocity, especially when cleaning filter elements.
Innovation Solution
The air filter assemblies incorporate venturi elements with extended pulse outlets featuring non-circular, generally oval cross-sectional shapes at the distal ends, matching the filter elements, and a pulse outlet length that diverges at different angles, improving airflow dynamics and reducing pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional venturi elements are used with standard pulse outlets, then the structure is simple and easy to manufacture, but the pressure drop increases and flow velocity decreases during filter element cleaning
Solution Approach 1:
The patent extends the pulse outlet in the axial direction and changes its cross-sectional shape from circular to oval, utilizing an additional spatial dimension to improve flow characteristics. This dimensional change allows the pulse air to maintain higher velocity over a longer distance, reducing pressure drop while effectively cleaning the filter elements.
Solution Approach 2:
The patent modifies key geometric parameters of the venturi element, specifically extending the pulse outlet length and changing its cross-sectional shape parameters. These parameter changes optimize the flow dynamics during pulse cleaning, reducing pressure drop while maintaining manufacturing feasibility.
2Device complexity
If conventional venturi elements are used with standard pulse outlets, then the structure is simple, but the flow velocity through the venturi elements decreases during cleaning
Solution Approach 1:
By extending the pulse outlet axially and changing its cross-section from circular to oval, the patent creates a more favorable flow path that maintains higher flow velocities. The extended outlet allows the pulse air jet to travel further without dissipating energy, thereby maintaining higher flow velocity during the cleaning process.
Solution Approach 2:
The patent introduces asymmetry by changing the pulse outlet cross-section from a symmetric circular shape to an asymmetric oval shape. This asymmetric geometry optimizes the flow distribution and reduces turbulence, thereby maintaining higher flow velocity with minimal increase in structural complexity.
3Ease of manufacture
If conventional venturi elements are used, then manufacturing is easy, but particulate matter collection efficiency is reduced due to poor airflow dynamics
Solution Approach 1:
The patent optimizes the geometric parameters of the venturi element, particularly the pulse outlet length and cross-sectional shape, to improve airflow dynamics. These parameter changes enhance the velocity and distribution of pulse air, thereby improving the efficiency of particulate matter removal from filter elements without significantly complicating the manufacturing process.
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 design enhances airflow through the venturi elements, reducing pressure drop and improving flow velocity, thereby increasing the efficiency of particulate matter collection and cleaning in air filter assemblies.
Implementation Method 1
The venturi elements include extended pulse outlets
Implementation Method 2
a pulse outlet length that diverges at different angles
Data Source
Figure 1
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AI summary
Air filtering assemblies described herein include one or more venturi elements that include extended pulse outlets. The pulse outlets may, in one or more embodiments, include two regions between the throat of the venturi element and the distal end of the pulse outlet that diverge at different rates. In one or more embodiments, the venturi elements may include openings at the distal ends of their pulse outlets that have non- circular cross-sectional shapes. In one or more embodiments, the non-circular cross- sectional shapes of the openings at the distal ends of the pulse outlets of the venturi elements may be selected to match non-circular openings in the filter elements attached to the pulse outlets of the venturi elements.