Convertible Drop-Front Drain Pan for Tight-Space Air Handler Support
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Solution Overview
Problem
Existing secondary drain pans for air handling units are inflexible and require thick materials for structural support, making them difficult to maneuver and install, especially in tight spaces like attics and crawlspaces, and they often need additional support to function effectively.
Innovation Solution
A secondary condensate drop-front drain pan with a thermoformed, unibody design featuring a main basin portion, an auxiliary basin portion, and flexible or convertible transition sections that allow it to be configured between stepped and standard orientations, enabling it to be installed in various orientations and providing structural support using standard materials, allowing for nestable stacking and reduced material thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick material is used for the drain pan to provide structural support, then the pan becomes stronger and more durable, but it becomes heavier and more difficult to maneuver through tight spaces
Solution Approach 1:
The drain pan is divided into multiple functional zones: a primary basin for condensate collection, a secondary basin for additional drainage capacity, and integrated riser sections for equipment elevation. This segmentation allows each zone to be optimized for its specific function while using standard material thickness throughout, eliminating the need for uniformly thick material that would increase weight.
Solution Approach 2:
The pan utilizes vertical dimensionality through integrated risers that elevate equipment to proper heights for drainage and access. Instead of using thick material to provide structural support, the design creates elevation in the vertical dimension, allowing standard thickness material to suffice while achieving the required equipment positioning.
2Ease of manufacture
If the drain pan is made with standard material thickness for cost effectiveness, then manufacturing cost is reduced, but the pan lacks sufficient structural support and requires additional support structures
Solution Approach 1:
The drain pan integrates multiple functions into a single unified structure: the basin for water collection, the risers for equipment elevation, and the support features for mounting. This merging eliminates the need for separate support structures and allows standard thickness material to provide adequate support when configured as an integrated unibody design.
Solution Approach 2:
The pan employs a unibody construction where multiple functional elements are formed as a single integrated piece from standard thickness material. This composite approach distributes structural loads throughout the entire structure rather than concentrating them, allowing standard material to provide sufficient support without requiring thicker sections.
3Ease of manufacture
If the pan is designed as a unibody structure for simplified manufacturing, then production is easier and cost is reduced, but the pan lacks flexibility for different installation configurations
Solution Approach 1:
The unibody pan incorporates flexible transition sections between the primary basin, secondary basin, and risers. These flexible zones allow the rigid unibody structure to be bent and configured into different shapes during installation, enabling adaptation to various installation locations and orientations while maintaining the manufacturing simplicity of a single-piece construction.
4Device complexity
If the pan includes integrated risers for equipment elevation, then additional support structures are eliminated, but the pan requires thicker material to withstand the structural load
Solution Approach 1:
The riser structure is segmented into multiple zones with varying functions: support zones that bear equipment weight, transition zones that connect to the basin, and equipment mounting zones. This segmentation allows each zone to be optimized for its specific load requirements, eliminating the need for uniformly thick material throughout the entire pan structure.
Solution Approach 2:
The integrated risers utilize vertical space to provide equipment elevation without requiring increased material thickness. By creating elevation in the vertical dimension rather than using thicker material, the design achieves structural support for elevated equipment while maintaining standard material thickness for cost effectiveness.
Data Source
AI summary
A secondary condensate drop-front drain pan comprises a drainage basin formed by a main basin portion, an auxiliary basin portion, and sidewalls that extend upwardly around a perimeter of the drain pan from both the main and auxiliary basin portions. The auxiliary basin portion, which is located along a side of the pan, is stepped down relative to the main basin portion. A transition portion between the main and auxiliary basin portions may be flexible or convertible and operative to configure the drain pan between a stepped configuration and a standard or substantially flat configuration. Downwardly extending projections or lugs may descend below the plane of the drainage basin to form notches or saddles for straddling or mounting the drain pan to support beams. The drain pan may be nestably stackable.