Plate heat exchangers
A barrier layer with lower permeability than the main seal material addresses the issue of gas escape in plate heat exchangers, providing a reliable and leak-free operation by reducing permeability without compromising seal elasticity.
DE102024115589B4Active Publication Date: 2026-06-18KELVION PHE II GMBH
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- KELVION PHE II GMBH
- Filing Date
- 2024-06-05
- Publication Date
- 2026-06-18
AI Technical Summary
Technical Problem
Conventional plate heat exchangers face the challenge of permeability issues with elastic sealing materials, allowing potentially hazardous gases to escape into the environment, despite effective leakage prevention.
Method used
Incorporating a barrier layer made of a material with lower permeability than the main seal material, extending between sealing surfaces, to create a permeability barrier that reduces the escape of heat exchanger medium while maintaining seal integrity.
Benefits of technology
The solution effectively prevents the leakage and permeation of heat exchanger medium, ensuring reliable operation even at high pressures and temperatures, without significantly impairing the seal's elastic properties.
✦ Generated by Eureka AI based on patent content.
Smart Images
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Abstract
Plate heat exchanger (1) with several adjacent heat exchanger plates (4) and a frame (2) in which the several heat exchanger plates (4) are clamped, wherein at least two channels (7) are formed between adjacent heat exchanger plates (4) for the passage of a heat exchange medium, wherein the respective heat exchange medium can be introduced into and discharged from the respective channel (7) via inlet openings (11) and outlet openings (13) formed by mutually aligned openings (4b) in the superimposed heat exchanger plates (4), wherein at least one seal (6) runs between the individual heat exchanger plates (4) to seal the respective channels (7) and / or the openings (4b) against an environment (U) and / or against each other, wherein the at least one seal (6) has a main body (9) made of an elastic sealing material (MD) and with a first permeability (P9), wherein the at least one seal (6) further comprises at least one barrier layer (B) made of a barrier material (MB) and with a second permeability (PB), wherein the first permeability (P9) of the main body (9) is greater than the second permeability (PB) of the barrier layer (B), characterized by the fact that - the barrier layer (B) is designed as a coating (17), wherein the coating (17) is applied to a surface (9a) of the main body (9) of the seal (6) on an outer sealing surface (8d) of the seal (6) facing the environment (U), and / or - the barrier layer (B) is designed as a coating (17), wherein the coating (17) is applied on one or both sides to a carrier (19) with a carrier thickness (D19) of between 5 µm and 300 µm and the carrier (19) is embedded in the main body (9) of the seal (6), and / or - the barrier layer (B) is designed as an insert (18) with an insert thickness (D18) of a maximum of 50 µm, preferably a maximum of 25 µm, in particular a maximum of 10 µm, wherein the insert (18) is embedded in the main body (9) of the seal (6), and wherein the barrier layer (B) has a barrier thickness (DB) of at most 50 µm, preferably at most 25 µm, in particular at most 10 µm.
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