Double-Suction Vehicle Air Filter Fan with Segmented Filtration
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Solution Overview
Problem
Existing air filter and fan devices in vehicle ventilation systems either fail to effectively filter the total air flow, leading to increased pressure losses and reduced filter life, and require additional protective grids to prevent impeller damage, while also occupying excessive space.
Innovation Solution
A double-suction air filter and fan device design with a flow guide system, where the air filter is positioned in front of the impeller, allowing air to enter from both sides, and the fan axis is inclined to optimize filter surface area utilization and reduce pressure losses, eliminating the need for protective grids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air filter is arranged in front of the impeller, then the total air flow is filtered, but the pressure losses increase and filter surface area utilization is limited
Solution Approach 1:
The air filter is divided into multiple sections (first air filter section and second air filter section) positioned at different locations relative to the impeller. The first section is positioned to filter air entering the impeller suction side, while the second section filters air in the discharge area. This segmentation allows effective filtration of total air flow while distributing the pressure loss across different zones and improving overall filter surface area utilization.
Solution Approach 2:
The air filter is designed with extended surfaces in the radial direction and incorporates three-dimensional positioning relative to the impeller. The filter elements are arranged to maximize surface area within the available space, utilizing the vertical and radial dimensions of the housing to improve filter surface area utilization while maintaining effective filtration of the total air flow.
2Reliability
If the air filter is positioned immediately in front of the impeller, then filtration is effective, but the filter surface area utilization is limited and pressure losses rise
Solution Approach 1:
The air filter system is segmented into multiple functional zones with distinct filter sections. The first air filter section is positioned at the impeller suction side to filter incoming air, while the second air filter section is positioned in the discharge area. This segmentation enables each section to be optimized for its specific function, maximizing the effective surface area utilization of the entire filter system while maintaining effective filtration.
Solution Approach 2:
The air filter design incorporates variable spacing and positioning of filter elements to optimize airflow distribution across the filter surface. The filter sections are positioned to create dynamic airflow patterns that maximize the utilization of available filter surface area, ensuring that air flows through the entire filter surface rather than concentrating in specific regions.
3Reliability
If protective grids are added in front of the impeller, then the impeller is protected from damage, but the device complexity and additional expenditure increase
Solution Approach 1:
The air filter is designed to serve multiple functions: it filters the total air flow, protects the impeller from large dirt particles, and maintains proper airflow distribution. By integrating the protective function into the existing air filter structure, the patent eliminates the need for separate protective grids, reducing device complexity while maintaining impeller protection.
Solution Approach 2:
The protective function previously requiring separate grids is merged with the air filter system. The air filter elements and housing structure are designed to simultaneously perform filtration and protection functions, combining multiple protective and filtration functions into a single integrated component system.
4Ease of manufacture
If the filter height is kept constant, then the structure is simple, but the installation space is not utilized optimally
Solution Approach 1:
The air filter design incorporates variable height sections tailored to the specific spatial requirements at different locations. The first and second air filter sections have different heights and configurations optimized for their respective positions relative to the impeller and housing. This local optimization of filter height maximizes the utilization of available installation space while maintaining structural feasibility.
Solution Approach 2:
The air filter system utilizes three-dimensional positioning and variable height configuration to optimize space utilization. By varying the height and radial positioning of different filter sections, the design maximizes the use of available vertical and radial space within the housing, transforming a two-dimensional constant-height approach into a three-dimensional optimized layout.
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 ensures effective filtration of the total air flow with reduced pressure losses and prolonged filter life, while minimizing system dimensions and optimizing installation space, enhancing filter capacity and efficiency.
Implementation Method 1
the air to be conditioned in the vehicle heating, ventilation, and air conditioning system (HVAC) is mechanically pre-cleaned as far as possible
Implementation Method 2
the impeller is established to the double-suction design receiving air from the air filter from both the impeller's upper side and lower side
Data Source
AI summary
An air filter and fan device for a vehicle ventilation system is disclosed that, in direction of air flow, includes an air filter, an impeller, and a flow-off channel. A casing is provided that accommodates the impeller and the flow-off channel in an enclosing manner such that the impeller is established with double-suction, receiving air from the air filter from both a first side and a second side or the impeller.