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Patent EP0661502A2 successfully refreshed from Google Patents.
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EP0661502A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A heat and moisture exchange device

Assignee: Japan Gore Tex Inc
•
Filing: 1994-11-09
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Granted: —
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Expires: 2014-11-09
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Abstract

Abstract The invention is for a device that provides heat exchange and moisture exchange for use in heating and air conditioning systems. The device consists of a housing containing an assembly having a non-porous water-vapor-permeable polymeric heat and moisture exchange film (2). The non-porous water-vapor-permeable heat and moisture exchange film is interposed between an air stream having a higher water content and an air stream having a lower water content. The film prevents passage of air through it but readily passes water vapor through it, thereby effecting heat exchange and moisture exchange between the air streams.

Inventors

  • 👤 Sadakatsu Hamasaki
  • 👤 Toru Sakamoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 14:28
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0015; B; B01; B01D; B01D69/00; B01D69/12; B01D69/1213; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/147; F24F2003/1435

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 135 words
A device for conditioning air having a housing containing an assembly for heat and moisture exchange, said assembly comprising: a composite film comprising a porous polymeric membrane having applied thereto a water-vapor-permeable polymeric material so as to form a non-porous barrier to bulk flow of air or other gas; said composite film being adapted to be interposed between a gas stream having a higher water content and a gas stream having a lower water content; whereby moisture from the gas stream having the higher water content permeates through said composite film to the side adjacent the gas stream having the lower water content where it is taken up by said gas stream having the lower water content, thereby effecting heat exchange and moisture exchange between the gas streams adjacent each side of said composite film.
Claim 2
Dependent Claim 20 words
A device as claimed in claim 1, in which the porous polymeric membrane is coated with the water-vapor-permeable polymeric material.
Claim 3
Dependent Claim 20 words
A device as claimed in claim 1, in which the porous polymeric membrane is impregnated with the water-vapor-permeable polymeric material.
Claim 4
Independent Claim 45 words
A device as claimed in any of claims 1 to 3, wherein said porous polymeric membrane has a pore volume of at least 50% and not greater than 95%; and said non-porous water-vapor-permeable polymeric material has a water-vapor-transmission rate of at least 30,000 gm²/24 hours.
Claim 5
Independent Claim 28 words
A device as claimed in any preceding claim, wherein said porous polymeric membrane is a porous polytetrafluoroethylene membrane; and said non-porous water-vapor-permeable material is a hydrophilic polyurethane polymer.

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