Desiccant Packet Integration in HVAC Air Filter Frame
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Solution Overview
Problem
Existing systems for dehumidifying air using HVAC systems face challenges in maintaining the integrity and effectiveness of desiccant materials within the filter medium over time, leading to inadequate humidity removal.
Innovation Solution
A system that integrates a desiccant within a channel of an air filter frame, where the desiccant is either in a powdered form or compartmentalized in breathable packets, allowing for air flow and utilizing adsorbent materials like CaCl2 and zeolites to absorb moisture from the air, without requiring additional equipment, and includes a hinged design for easy replacement of the filter medium and desiccant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If desiccant material is integrated into the filter medium in mass quantities, then dehumidification effectiveness is improved, but the desiccant material cannot maintain its integrity or position within the filter material over time
Solution Approach 1:
The desiccant material is segmented into individual packets or capsules that are distributed throughout the filter medium. This segmentation allows the desiccant to maintain its structural integrity while still providing effective dehumidification. The packets are contained within the filter medium but remain as discrete units that do not deteriorate or shift position over time.
Solution Approach 2:
The filter medium itself acts as an intermediary carrier for the desiccant packets. The packets are embedded within the filter material structure, allowing the filter medium to serve as both a filtering element and a supporting structure for the desiccant. This intermediary relationship ensures the desiccant maintains position while achieving dehumidification.
2Reliability
If additional dehumidification equipment is added to the HVAC system, then dehumidification capability is improved, but device complexity and cost increase
Solution Approach 1:
The dehumidification function is merged with the existing air filter component. The filter medium is modified to include desiccant packets, combining the filtering and dehumidification functions into a single component. This eliminates the need for separate dehumidification equipment while maintaining both functions' effectiveness.
Solution Approach 2:
The air filter is transformed into a multi-functional component that performs both particle filtering and moisture removal. By integrating desiccant packets into the filter medium, the single component achieves multiple functions (filtering and dehumidification) without requiring additional dedicated equipment, thereby reducing overall system complexity.
3Reliability
If desiccant material is used in large quantities within the filter, then moisture removal effectiveness is improved, but the filter medium structure becomes compromised
Solution Approach 1:
The desiccant packets are distributed locally throughout the filter medium rather than concentrated in one area. This local distribution allows effective moisture removal across the entire filter surface while maintaining the structural integrity of the filter medium. The packets are embedded in specific locations within the filter material without compromising its overall strength.
Solution Approach 2:
The filter medium utilizes its porous structure to accommodate the desiccant packets while maintaining airflow and structural stability. The packets are positioned within the porous matrix of the filter material, allowing the porous structure to serve dual purposes: supporting the packets and enabling air passage. This approach maintains both moisture removal effectiveness and filter medium strength.
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
Effectively reduces water vapor and particles in the air, maintaining air flow while promoting equilibrium to dehumidify the air without compromising the HVAC system's operation, and allows for easy maintenance by enabling replacement of the desiccant and filter medium.
Implementation Method 1
desiccant materials may be used to remove water vapor from air due to their high affinity for water molecules
Implementation Method 2
Absorbent desiccants undergo a chemical change in the presence of water
Implementation Method 3
An air filter medium is disposed within the space defined by the inner frame wall
Data Source
AI summary
A device for dehumidifying a column of air has a frame has an outer frame; the outer frame having an outer wall. An inner frame having an inner frame wall is disposed on the frame, spaced from the outer wall at an interior of the outer wall. A channel is formed between the outer wall and inner frame wall. A front panel, formed as a grid, is disposed on the outer wall and is coextensive with the frame. A back panel, formed as a grid, is disposed on an opposed side of the outer frame wall, from the front and is coextensive with the frame. Each grid has sufficient openings therein so as not to significantly impede the flow of air through the device from the front panel to the back panel. An air filter medium is disposed within the space defined by the inner frame wall. A desiccant is disposed within the channel.