Through-Hole Separator Plates for Heat Exchanger Leak Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heat exchangers with tubular body distributors face significant performance losses due to internal leaks between partitioned spaces, which are difficult to detect during production.
Innovation Solution
A heat exchanger design featuring a separator element composed of a pair of plates with raised peripheral edges and laterally protruding portions, joined at their central portions to create an annular gap. This design is inserted into a through-hole in the distributor, allowing leaks to be detected through a pressure-tightness test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separator partition is installed to divide the passages inside the heat exchanger, then the heat exchanger performance is improved by preventing internal leakage, but the complexity of detecting leaks during production increases significantly
Solution Approach 1:
A detection channel is introduced as an intermediary element that connects the first and second inner spaces. This channel serves as a mediator to transport leaked fluid from the sealed separator area to an accessible detection location, enabling simple pressure-tightness testing without complex detection equipment.
Solution Approach 2:
The detection function is extracted from the main separator structure by creating a separate detection channel. This allows the leak detection capability to be separated from the separator's primary partitioning function, enabling independent testing of the separator's tightness through the dedicated channel.
2Ease of manufacture
If conventional separator designs are used, then the manufacturing process is simpler, but the sensitivity to detect small leaks is insufficient
Solution Approach 1:
The detection channel acts as an intermediary that amplifies the detectability of small leaks. By providing a dedicated pathway for leaked fluid, even minor leaks become visible through pressure-tightness tests, significantly improving detection sensitivity without complicating the manufacturing process.
3Reliability
If the separator element is inserted into a through-hole in the distributor, then the internal leakage is prevented, but the complexity of the separator structure increases
Solution Approach 1:
The separator element is segmented into two functional parts: the separator body that performs the partitioning function, and the integrated detection channel that provides leak detection capability. This segmentation allows each part to perform its specific function efficiently while maintaining overall structural simplicity.
Solution Approach 2:
The detection channel is merged with the separator element structure, combining the leak prevention and leak detection functions into a single integrated component. This merging reduces the total number of separate parts while maintaining both functions, thereby reducing overall system complexity.
Data Source
Figure 1
Figure 2~3
Figure 4~5b
AI summary
A heat exchanger comprising a first distributor (11) and a second distributor (12) and a plurality of parallel, coplanar tubes (13) interconnecting the first distributor (11) and the second distributor (12). One of the distributors (11) comprises a separator element (30) inserted into a through-hole (18) formed on a side wall (11a) of the distributor (11). The separator element (30) comprises a pair of plates (31, 32), each of which comprises a central portion (31a, 32a) and a peripheral edge (31b, 32b) raised with respect to the central portion (31a, 32a), the plates (31, 32) being joined to each other at their respective central portions (31a, 32a) so as to define an annular gap (G) around the central portions (31a, 32a), interposed between the peripheral edges (31b, 32b) of the plates (31, 32), wherein the peripheral edge (31b, 32b) of each plate (31, 32) has a pair of laterally protruding portions (31c, 32c) arranged on opposite sides of the plate (31, 32), and interposed between opposite edges (18') of the through-hole (18).