Air Handling Unit Support Plate Sealing for Low Leakage
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Solution Overview
Problem
Small air handling units, such as side-by-side units, face significant air leakage challenges due to their design similarities with larger units, despite handling lower airflow volumes, leading to difficulties in achieving high air tightness without excessive sealing materials, especially at corners and access points.
Innovation Solution
The introduction of extra support plates on each long side of the air handling unit, fixedly attached to the top, bottom, and connection panels, with overlapping seals and hatch-like panels covering all openings, provides a robust and air-tight sealing arrangement, minimizing leakage by ensuring every contact point is sealed, including assembly holes and service openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional framework or housing design is used in small air handling units, then manufacturing cost is reduced and assembly is simplified, but air leakage increases significantly at corners and access points
Solution Approach 1:
The housing is divided into modular panels (front, rear, top, bottom) that can be independently manufactured and assembled. Each panel is a separate component that can be produced using standard fabrication processes, reducing overall manufacturing complexity while maintaining sealing integrity through standardized connection interfaces.
Solution Approach 2:
Sealing elements are introduced as intermediary components between the housing panels and access doors. These sealing elements (gaskets, seals, or sealing strips) act as mediators that bridge the gap between rigid structural components, preventing air leakage at joints and corners without requiring complex integrated sealing designs.
2Ease of operation
If access doors are included for maintenance of filters and heat exchangers, then serviceability is improved, but sealing reliability deteriorates due to repeated opening and closing
Solution Approach 1:
Sealing elements are pre-installed on access doors and housing panels during manufacturing, ensuring proper positioning and alignment before the doors are ever used. This preliminary sealing preparation ensures that repeated opening and closing operations do not compromise the seal integrity, as the sealing interface is already optimized and protected.
Solution Approach 2:
Flexible sealing elements (gaskets and seals) are used on access doors to accommodate the repeated mechanical stress of opening and closing operations. These flexible materials can deform during door operation and then return to their sealing position, maintaining reliability despite frequent use compared to rigid sealing structures.
3Object-generated harmful factors
If more sealing materials are used to achieve higher air tightness, then leakage class is improved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
Standardized sealing elements are used uniformly across all housing joints and access points. This homogeneous sealing approach simplifies the overall sealing system by using the same or similar sealing components throughout, reducing the variety of sealing materials needed and simplifying both manufacturing and assembly processes while achieving consistent air tightness across the entire housing.
Data Source
AI summary
Stabilizing and sealing arrangement for an side-by-side air handling unit (1), with a housing (2), comprising a top-, a bottom, two connection panels (3, 4, 5, 6), and a service side (7) and an installation side (8). The invention is characterized by that a support plate (10) is fixedly arranged to the end sides of the housing (2), at the service side (7) and at the installation side (8) respectively, and the support plate (10) comprising a first seal (11) arranged between adjacent end sides (3a, 3b; 4a, 4b; 5a, 5b; 6a, 6b; 9a, 9b) and the support plate (10). Any opening (13) in respective support plate (10) is in turn covered by at least one hatch-like panel (15a,....15n), each comprising a second seal (16a,...16n) facing the support plate (10) such as each opening (13) is surrounded by the second seal (16a,...16n).