Kitchen Hood Filter With Pre-Ionization for High Airflow Purification
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Solution Overview
Problem
Existing hood filters for kitchens are inadequate in improving air quality due to limitations in processing large volumes of air and effectively removing impurities and odors, and they often require auxiliary devices for electrostatic charging and germicidal functions.
Innovation Solution
A hood filter design featuring a centrifugal air suction unit followed by an ionization and filtration unit, where the air is diverted through an elbow-shaped path to prolong residence time in the ionization chamber, utilizing ionization to break down odor molecules without an electric field, and incorporating active carbon and zeolite filters for enhanced purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air is taken in directly downstream of the ventilator exit, then the air stream velocity is high, but the ionization effectiveness is limited or unsatisfactory
Solution Approach 1:
The patent introduces a preliminary action by placing the ionization mechanism upstream of the ventilator exit rather than downstream. This allows ionization to occur before the air stream reaches its highest velocity point, ensuring effective ionization while maintaining high air processing capability. The ionization chamber is positioned to receive air directly from the environment, and the ventilator then draws this pre-ionized air through the system.
2Productivity
If the air stream velocity is high, then large volumes of air can be processed, but the residence time in the ionization chamber is insufficient
Solution Approach 1:
By performing ionization before the high-velocity air stream is generated by the ventilator, the patent ensures that the air spends sufficient time in the ionization chamber at lower velocities, while still achieving high overall air processing volumes through the ventilator's drawing action.
Solution Approach 2:
The patent segments the air processing function into distinct zones: an ionization zone upstream where air is processed at lower velocities with sufficient residence time, and a ventilation zone downstream where high-velocity air movement achieves high productivity. This segmentation allows both requirements to be met simultaneously in different spatial regions.
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 significantly improves air quality by drastically reducing impurities and odors, processing large volumes of air effectively, and extending filter life, while being safe, economical, and reliable, without the need for auxiliary electrostatic devices or germicidal lamps.
Implementation Method 1
ionization means (30) able to ionize the air stream taken in
Implementation Method 2
centrifugal ventilator means (22) able to take in a stream of air from the surrounding environment
Implementation Method 3
filter means (32) disposed downstream of the ionization means (30) along the path (F) of the stream of air taken in
Data Source
Figure 1~3
Figure 4~7
Figure 8~9
AI summary
Hood filter comprising an air purification device (10), provided with a first air suction unit (16) that comprises centrifugal ventilator means (22) able to take in a stream of air from the surrounding environment along a determinate path, and with a second processing unit (18) to ionize and filter the air taken in by the centrifugal ventilator means (22).