Hollow Core Door Venting for Pressure Equalization and Air Scrubbing
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Solution Overview
Problem
Hollow core doors contribute to 'Sick Building Syndrome' due to formaldehyde emissions and lack effective solutions for preventing air pressure buildup in closed rooms, which interferes with air circulation in forced air systems.
Innovation Solution
The development of hollow core doors with integrated absorbent materials that absorb and decompose formaldehyde gases and other noxious substances, combined with air flow passages to equalize pressure by allowing air to flow non-linearly through the door, preventing pressure buildup while providing privacy and scrubbing functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hollow core doors are made using cheaper materials like hardboard and MDF with urea formaldehyde resin, then manufacturing cost is reduced and ease of manufacture is improved, but harmful formaldehyde emissions are generated contributing to Sick Building Syndrome
Solution Approach 1:
The patent incorporates absorbent materials within the hollow core door structure that actively capture and decompose formaldehyde emissions generated by the MDF panels. This transforms the harmful byproduct of using economical MDF materials into a treatable condition, allowing the door to self-cleanse the indoor air while maintaining manufacturing cost-effectiveness
Solution Approach 2:
The hollow core construction inherently provides porous pathways for air flow and pollutant transport. The patent utilizes this porous structure to channel air containing formaldehyde emissions through absorbent materials embedded within the core, enabling continuous air purification without compromising the door's structural integrity or manufacturing simplicity
2Object-affected harmful factors
If hollow core doors are made airtight to provide privacy, then privacy is improved, but air pressure builds up in closed rooms interfering with forced air system circulation
Solution Approach 1:
The patent implements selective permeability within the door structure by positioning absorbent materials and air flow pathways in specific locations within the hollow core. This creates localized zones that allow controlled air exchange for pressure equalization while maintaining overall door privacy functionality, enabling different regions of the door to serve different purposes
3Object-generated harmful factors
If absorbent materials are added to hollow core doors to remove noxious gases, then air quality is improved, but device complexity increases
Solution Approach 1:
The patent merges the air purification function with the existing hollow core door structure by integrating absorbent materials directly into the core during manufacturing. This consolidation combines structural support, air flow pathways, and pollutant absorption into a single unified component, avoiding the need for separate air treatment devices and minimizing additional complexity
Solution Approach 2:
The hollow core door structure is transformed into a multi-functional element that simultaneously provides structural support, maintains privacy, enables pressure equalization through controlled air flow, and purifies indoor air through integrated absorbent materials. This universal design eliminates the need for separate air treatment devices
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 reduces formaldehyde and other noxious gas concentrations in indoor air, improving indoor air quality and preventing air pressure buildup, thus enhancing comfort and air circulation in buildings.
Implementation Method 1
The present invention includes absorbent material which absorbs and decomposes formaldehyde gases and other noxious materials and removes them from within the hollow core door and from air passing through the hollow core of a door
Implementation Method 2
core having openings through which air passes between a room and a return air area for equalizing the pressure in the room and in the return air area
Data Source
AI summary
Hollow core door apparatus for preventing the build up of pressure in a room having a register through which air flows into the room and the door includes an inside door skin and an outer door skin, and the door skins includes openings in which a box is disposed. The box includes a center panel and at least a single opening in or through the center panel; the box also includes an inside panel and an outside panel, both of which panels are secured to and spaced apart from the center panel. The inside and outside panels have peripheral openings and which peripheral openings define areas at least as great as the area of the opening in the center panel and are offset from the opening in the center panel to provide for a non-linear flow of air through the door to prevent the build up of pressure in the room. An embodiment combining a noxious gas absorbent material with the pressure build up prevention capability is also illustrated.