Amorphous Silica Temperature Pump Filters for Indoor Air
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Solution Overview
Problem
Existing air filtration technologies are inadequate in effectively addressing indoor air pollution, particularly in tightly sealed buildings where pollutants like bacteria, mold, and gases accumulate, and they often rely on carcinogenic materials or require frequent filter replacement.
Innovation Solution
The development of temperature pump passive filters using natural amorphous silica, which adsorbs pollutants at low temperatures and desorbs them at slightly higher temperatures, allowing for the creation of automated devices that recycle and reuse the filter material, eliminating the need for frequent replacement and avoiding carcinogenic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional air filtration technologies are used, then air pollution can be filtered, but carcinogenic materials are required and frequent filter replacement is needed
Solution Approach 1:
The patent changes the temperature parameter to resolve the contradiction. Amorphous silica adsorbs pollutants at low temperatures (below 26-27°C) and desorbs them at slightly higher temperatures. This temperature-dependent parameter change allows the filter material to be reusable through thermal cycling, eliminating the need for frequent replacement and avoiding carcinogenic materials while maintaining effective pollution filtration.
Solution Approach 2:
The patent utilizes phase transitions of amorphous silica between adsorption and desorption states through temperature changes. At low temperatures, the silica is in an adsorption phase that captures pollutants; at elevated temperatures, it transitions to a desorption phase that releases pollutants. This reversible phase transition enables the filter to be regenerated and reused indefinitely without degrading into carcinogenic materials or requiring frequent replacement.
2Object-affected harmful factors
If conventional air filtration technologies are used, then air pollution can be filtered, but frequent filter replacement is required
Solution Approach 1:
The patent applies parameter changes by utilizing temperature as a control variable. The amorphous silica filter operates in cycles: at low temperatures (below 26-27°C) it adsorbs pollutants extending its service life; when saturated, it is heated to higher temperatures to desorb and release the accumulated pollutants. This parameter-based regeneration process allows the filter to be reused indefinitely, dramatically extending its service life compared to conventional filters that must be replaced frequently.
Solution Approach 2:
The patent implements discarding and recovering by temporarily discarding the adsorbed pollutants during the desorption phase and recovering the filter's adsorption capacity. The thermal cycling process allows the filter material to be regenerated through desorption, where accumulated pollutants are released and the filter is restored to its clean state, ready for another adsorption cycle. This recovering process eliminates the need for frequent filter replacement.
3Duration of action of stationary object
If temperature pump passive filters are used, then filters become reusable through temperature cycling, but automated temperature control systems are required
Solution Approach 1:
The patent applies periodic action through automated temperature cycling. The system automatically alternates between low-temperature adsorption phases and high-temperature desorption phases at predetermined intervals. This periodic temperature variation is controlled by a microprocessor that monitors and adjusts the heating elements, enabling the filter to continuously cycle between capturing and releasing pollutants without manual intervention, thus achieving reuse capability while managing system complexity through automation.
Solution Approach 2:
The patent implements self-service through the automated temperature control system that manages the filter's own regeneration process. The microprocessor-controlled system automatically detects when the filter needs regeneration and initiates the heating sequence to desorb pollutants. The system serves itself by autonomously cycling the temperature to maintain optimal filter performance, reducing the need for external intervention and enabling continuous reuse of the filter material.
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
These filters significantly reduce indoor air pollution by adsorbing a wide range of pollutants, including bacteria, mold, and gases, while being reusable and non-toxic, thus improving indoor air quality and reducing energy consumption.
Implementation Method 1
amorphous silica acts as a weak desiccant, and adsorbs gasses and micro-droplets of water containing a wide variety of small particulates
Implementation Method 2
increase the temperature of the pollutant-filled amorphous silica powder, increasing Brownian motion of the amorphous silica and the pollutant molecules within it
Implementation Method 3
causing the amorphous silica to desorb the pollutants, thereafter venting them into the atmosphere
Data Source
AI summary
Embodiments of passive air pollution filters designed for providing efficient adsorption of fungal spores, airborne bacteria, small hydrocarbons, viruses, prions, insect parts, hyphal parts, pollens, other allergens, radon gas, and other small air pollutants, both gaseous and particulate, from cool air are disclosed. Each embodiment comprises a filter bag portion, attractant mineral, a filter container, and a means of supporting the filter assembly. Stationary filters must be replaced and reprocessed periodically. Permanent passive air filtration coatings for building materials, which prevent condensation and growth of mold from occurring in building walls and in other structures, are disclosed. Automated temperature pump passive filtration devices, which automatically remove excess humidity, odors, particulate air pollutants, both mineral and biological, gaseous air pollutants, and allergens from enclosed volumes of air at a temperature of less than 26-27° C., about 80° F., are also disclosed.