Portable HVAC Duct Cleaning Pod for Tight-Space Access
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Solution Overview
Problem
Existing air duct cleaning systems are inadequate in removing fine particulate matter and debris from HVAC ducts, often requiring impractical multiple entries and being difficult to maneuver in tight spaces, especially with high ceilings and long ductwork.
Innovation Solution
A portable duct cleaning system comprising a man-portable pod with a vacuum chamber, a drive motor, and a conduit member with a curved air path, coupled with a cart for rollable conveyance and storage of a flexible vacuum hose, allowing for more efficient and thorough duct cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating brush at the end of a flexible vacuum hose is used to clean ducts, then dust and debris can be removed from ducts, but the system becomes difficult to maneuver in tight spaces and requires multiple entries for long ductwork
Solution Approach 1:
The system divides the duct cleaning task into segments by providing multiple nozzle assemblies that can be positioned at different locations along the ductwork, allowing thorough cleaning without requiring the entire hose length to reach distant registers
Solution Approach 2:
The patent introduces a multi-dimensional approach by allowing the vacuum unit to be positioned at various locations (not just at register level) and using nozzles that can be directed at different angles and positions within the duct system, maximizing cleaning coverage from each setup position
2Adaptability or versatility
If the vacuum-generating units are made large and mobile, then they can be moved to different locations, but they become too heavy and impracticable to take into attics
Solution Approach 1:
The patent extracts the vacuum-generating function from a large, heavy mobile unit and relocates it to a fixed installation at the air handler or plenum location. This eliminates the need to physically move heavy equipment into attics while maintaining the ability to service entire duct systems through the extracted vacuum function distributed through the duct network
Solution Approach 2:
The patent introduces fixed mounting structures and structural interfaces as intermediaries between the vacuum system and the building infrastructure. These intermediaries provide stable installation points at air handlers and plenums, eliminating the need for heavy portable units while enabling effective duct cleaning through the fixed intermediary installation points
3Length of stationary object
If hose length is extended to reach distant registers, then more duct areas can be cleaned, but the brush drive mechanism becomes difficult to extend through additional hose lengths
Solution Approach 1:
The patent applies partial action by positioning nozzles to clean specific duct segments and sections rather than requiring the brush mechanism to extend through the entire hose length. Multiple nozzles at different positions provide sufficient cleaning coverage without the complexity of extending drive mechanisms through excessive hose lengths
4Length of moving object
If conventional duct cleaning systems are used with high two-story ceilings, then registers can be reached, but it becomes impractical to properly clean ducts due to excessive hose usage just to reach registers
Solution Approach 1:
The patent changes the dimensional approach by allowing vertical positioning of the vacuum unit at the air handler location (which may be at different elevations) and using directed nozzles that can reach high registers without requiring excessive hose length. This multi-dimensional positioning approach maximizes cleaning efficiency in high-ceilinged spaces
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 system provides improved airflow and vacuum efficiency, enabling more thorough duct cleaning with reduced time and effort, especially in tight spaces, by allowing the main vacuum unit to be taken close to the plenum, maximizing hose length usage, and facilitating cleaning of high-ceilinged areas.
Implementation Method 1
a pod having a vacuum chamber therein
Implementation Method 2
vacuum chamber... vacuum inlet opening... drive shaft exit opening
Data Source
AI summary
An apparatus for cleaning ducts of a heating/ventilation/air conditioning (HVAC) system is provided. In one embodiment, a pod has a vacuum chamber therein, a drive motor located within the pod and configured to receive a removable drive shaft therein, and a conduit member located within the pod adjacent the drive motor. The conduit member has a vacuum inlet opening at an exterior wall of the pod and a drive shaft exit opening formed in the conduit member through which the removable drive shaft can extend. In one embodiment, the invention comprises a man-portable pod and a cart removably-coupleable to the man-portable pod. A method of manufacturing the apparatus and a method of cleaning an HVAC duct is also provided.