Modular drain pans for HVAC systems
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Solution Overview
Problem
Existing HVAC system drain pans are difficult to access and maintain due to their installation in tight spaces and are prone to corrosion and microbial growth, which complicates the assembly and increases maintenance demands.
Innovation Solution
A modular drain pan assembly made from plastic with anti-microbial additives, featuring injection-molded end sections and an extruded middle section with a double-wall construction for reduced condensate formation, allowing for efficient assembly and removal without tools and minimizing corrosion risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional metal drain pans are used in HVAC systems, then they can collect condensate effectively, but they are prone to corrosion and microbial growth requiring frequent maintenance
Solution Approach 1:
The patent changes the material parameter from traditional metal to plastic, fundamentally altering the chemical properties to resist corrosion and microbial growth. This material substitution eliminates the corrosion issue inherent in metal drain pans while maintaining the condensate collection function.
Solution Approach 2:
The drain pan employs a composite construction combining plastic material with integrated insulation layers and antimicrobial additives. This composite approach provides both corrosion resistance and biological protection, addressing multiple failure modes simultaneously through material composition rather than separate protective measures.
2Object-affected harmful factors
If insulation is added to the bottom surface of the drain pan to prevent condensation, then moisture condensation is reduced, but the assembly process becomes more complex and maintenance demand increases
Solution Approach 1:
The insulation layer is merged with the drain pan body into a single integrated component rather than being a separate attachment. This consolidation eliminates the need for separate insulation installation steps while maintaining the thermal protection function, thereby reducing assembly complexity.
Solution Approach 2:
The insulation is pre-integrated into the drain pan manufacturing process, so the thermal protection is already in place before installation. This preliminary action eliminates the need for field installation of insulation, simplifying the assembly process and reducing maintenance requirements.
3Area of stationary object
If the drain pan is installed in tight spaces to save space, then space utilization is improved, but accessibility for maintenance becomes difficult and equipment-intensive
Solution Approach 1:
The drain pan is divided into modular sections that can be assembled in tight spaces but disassembled for maintenance. This segmentation allows the unit to fit into constrained areas while enabling easy access to individual components for servicing without requiring complete removal.
Solution Approach 2:
The drain pan incorporates removable and reconfigurable components that transition from a fixed installed state to an accessible maintenance state. This dynamic design allows the same structure to optimize space during operation while providing easy access during maintenance periods.
4Adaptability or versatility
If connectors are made removable with tools for drain pan installation, then installation flexibility is improved, but the maintenance process becomes equipment-intensive and difficult
Solution Approach 1:
The connector design enables tool-free operation for both installation and maintenance, allowing technicians to service the drain pan using only hand operations. This self-service capability eliminates the need for specialized tools during maintenance while maintaining the flexibility of removable connections.
Solution Approach 2:
Instead of designing connectors that require tools for removal and then simplifying installation, the patent inverts the approach by designing for tool-free removal first, which naturally simplifies installation. This reversal of the design priority resolves the maintenance difficulty issue while preserving installation flexibility.
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 modular design enhances accessibility and reduces maintenance needs by providing a durable, anti-microbial, and sweat-resistant solution for collecting condensate from HVAC systems, improving operational efficiency and extending service intervals.
Implementation Method 1
the middle section may include double walls that define an insulating cavity for reducing sweat or condensate formation on a bottom surface
Implementation Method 2
A modular drain pan assembly made from plastic with anti-microbial additives
Data Source
AI summary
A drain pan for a HVAC system includes a middle section defining a cavity extending from a first end of the middle section to a second end of the middle section, a first end section configured to partially extend into the cavity via the first end of the middle section, and a second end section configured to partially extend into the cavity via the second end of the middle section. The second end section includes a drain port. In some embodiments, the drain pan is modular, enabling different middle sections of various lengths to be coupled between the end sections. The cavity of some embodiments is formed by double walls, which insulate the middle section to reduce condensate formation on a bottom surface of the middle section. By forming one or multiple sections from plastic with an anti-microbial additive, the drain pan further reduces corrosion, microbial growth, and/or condensate generation.