AC Viewing Window Seal Structure to Prevent Fogging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing viewing windows in air handling units are prone to fogging and visibility impairment due to changing air conditions and moisture from wall filler, despite having reliable protection against contaminants.
Innovation Solution
A viewing window design with end seals on adjacent spacer frames forming a continuous, circumferential seal, combined with spacer frames and collars to prevent moisture ingress and contamination, and optional lighting for improved visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional viewing windows are used without end seals, then the structure is simpler and easier to manufacture, but moisture ingress occurs leading to fogging and visibility impairment
Solution Approach 1:
The end seal is divided into two separate sealing halves, one on each spacer frame, that join together to form a complete circumferential seal. This segmentation allows each component to be manufactured independently and assembled together, creating a reliable seal without requiring a complex single-piece seal structure.
Solution Approach 2:
The end seal acts as an intermediary element between the two spacer frames, creating a protective barrier that prevents moisture and contaminants from reaching the viewing window interior. This intermediate sealing layer resolves the contradiction by adding protection without significantly complicating the overall structure.
2Reliability
If end seals are added to prevent moisture ingress, then visibility is improved, but manufacturing complexity increases
Solution Approach 1:
By dividing the end seal into two separate sealing halves that can be manufactured independently on each spacer frame, the manufacturing process becomes more flexible. Each sealing half can be produced using standard molding processes and then assembled together, reducing the complexity compared to manufacturing a complete circumferential seal as a single complex component.
Solution Approach 2:
The two sealing halves are merged during assembly to form a complete circumferential seal. This merging step is straightforward and allows the complex sealing function to be achieved through simple joining of two identical or complementary components, rather than manufacturing one complex seal.
3Reliability
If spacer frames are designed with end seals extending over half the circumference, then sealing effectiveness is improved, but the amount of sealing material increases
Solution Approach 1:
The circumferential seal is segmented into two halves, each extending over approximately half the circumference of the spacer frame. This segmentation allows the sealing function to be distributed across two components rather than requiring one continuous seal, reducing the total quantity of sealing material while maintaining effective circumferential coverage.
Solution Approach 2:
The sealing halves are designed with asymmetric positioning that complements each other. When assembled, the two asymmetric halves together form a symmetric complete seal, optimizing the use of sealing material by positioning each half to cover the necessary circumference with minimal material overlap.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a viewing window (1) for installation in a viewing opening (101), in particular a viewing opening (101) of an air conditioning system, comprising two distance frames (2), which can be inserted into the viewing opening (101) from opposite directions (R1, R2) and rest against one another by way of their end faces (3), said distance frames providing, on their end faces (3), an end-face seal (4) for mutually sealing the two distance frames (2) resting against one another.