Ventilation Duct Cleaning via Dry Ice Pellet Impact and Electrostatic Precipitation
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Solution Overview
Problem
Conventional cleaning apparatuses fail to effectively dislodge and collect dust and debris from structures like ventilation ducts, leading to airflow restrictions and health issues, due to inefficiencies in debris removal and collection methods.
Innovation Solution
A cleaning apparatus that projects dry ice pellets to dislodge debris and uses an electrostatic precipitator to collect the dislodged particles, along with a flow source to drive the debris out and a carbon dioxide detector for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cleaning apparatuses are used to clean ducts, then the cleaning process is simple, but the debris removal effectiveness is poor and airflow restriction is not resolved
Solution Approach 1:
The cleaning system is divided into distinct functional modules: a projectile source for debris dislodgement, a flow source for debris transport, and an electrostatic precipitator for particle collection. This segmentation allows each component to be optimized independently while working together to solve the debris removal problem effectively.
Solution Approach 2:
The patent replaces conventional mechanical cleaning methods with a combination of dry ice pellet impact (thermal and mechanical effect) and electrostatic precipitation. This substitution enhances debris removal effectiveness by using thermal shock from dry ice and electrostatic forces to capture particles, overcoming the limitations of purely mechanical cleaning approaches.
2Productivity
If dry ice pellets are used to dislodge debris, then cleaning effectiveness improves, but carbon dioxide gas is generated posing safety risks
Solution Approach 1:
The electrostatic precipitator serves as an intermediary device that captures the carbon dioxide gas and dislodged debris particles together, separating them from the clean air stream. This intermediary mechanism allows the system to benefit from dry ice pellet effectiveness while mitigating the harmful effects of CO2 accumulation through active removal and ventilation control.
Solution Approach 2:
The system incorporates monitoring that detects carbon dioxide levels and provides feedback to control the ventilation and electrostatic precipitation processes. This feedback mechanism ensures that CO2 concentrations remain within safe limits while maintaining effective cleaning operation, dynamically adjusting system parameters based on real-time conditions.
3Productivity
If electrostatic precipitator is added to collect debris, then particle collection improves, but device complexity increases
Solution Approach 1:
The patent merges the debris collection function with the ventilation system by integrating the electrostatic precipitator into the existing air flow path. This consolidation allows the system to achieve effective particle collection without requiring completely separate collection infrastructure, thereby limiting the increase in overall system complexity while maintaining high debris collection efficiency.
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 solution effectively removes debris from structures, reduces contamination, and minimizes carbon dioxide exposure by using dry ice pellets and electrostatic precipitation, enhancing cleaning efficiency and safety.
Implementation Method 1
projecting a plurality of projectiles proximate the structure to dislodge debris particles from the structure
Implementation Method 2
projected dry ice and is further configured to collect such debris
Implementation Method 3
an electrostatic precipitator configured to remove the dislodged debris particles from the air flow
Implementation Method 4
a flow source configured to create an air flow for driving the dislodged debris particles from the structure
Data Source
AI summary
A cleaning apparatus may include a flow source such as a fan which creates air flow through a ventilation duct or other structure to be cleaned. A projectile source projects projectiles such as dry ice pellets proximate the structure to dislodge debris particles therefrom and introduce the dislodged debris particles into the air flow. An electrostatic precipitator removes the particles from the air flow. An upstream sensor may be used to detect the particles upstream of the electrostatic precipitator and determine if the structure is clean using a controller. A downstream sensor may be used to detect the particles downstream of the electrostatic precipitator and determine the efficiency of the electrostatic precipitator using the controller. Carbon dioxide within the air flow may also be detected.