US4484938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Total heat exchanger
Assignee: Soken Inc
•
Filing: 1983-01-17
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Granted: 1984-11-27
•
Expires: 2003-01-17
Abstract
Abstract A total heat exchanger for exchanging both heat and humidity is made, using partition plates of a laminate of a carbon-fiber-based paperlike material and a hydrophilic material, resulting in improving the humidity exchange ability while both the permeability and the heat conductivity are high.
Inventors
- 👤 Kunio Okamoto
- 👤 Akira Fukami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:18
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/30; B; B01; B01D; B01D53/00; B01D53/26; B01D53/261; F24F3/00; F24F3/12; F24F3/14; F24F3/147
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A total heat exchanger for exchanging sensible and latent heat between first and second gas flows having different temperatures and humidities, said total heat exchanger comprising a plurality of flat partition plates capable of exchanging both sensible and latent heat between two gas flows passed along both sides of each of the partition plates, support members spacing and supporting said partition plates in parallel to each other and cooperating with said partition plates to define two series of passages for first and second gas flows, wherein said partition plates are a laminate of a carbon-fiber-based paperlike material and a hydrophilic material, the carbon-fiber-based paper like material containing no less than about 20% by weight of carbon fiber, based on the total weight of the carbon-fiber-based paper like material.
Claim 2
Dependent Claim
128 words
A total heat exchanger for exchanging sensible and latent heat between first and second gas flows having different temperatures and humidities, said total heat exchanger comprising a plurality of flat partition plates capable of exchanging both sensible and latent heat between two gas flows passed along both sides of each of the partition plates, support members spacing and supporting said partition plates in parallel to each other and cooperating with said partition plates to define two series of passages for first and second gas flows, wherein said partition plates are a laminate of a carbon-fiber-based paperlike material and a hydrophilic material, the carbon-fiber-based paper like material containing no less than about 20% by weight of carbon fiber, based on the total weight of the carbon-fiber-based paper like material.
Claim 3
Dependent Claim
16 words
A total heat exchanger according to claim 1, wherein said hydrophilic material is paperlike in structure.
Claim 4
Dependent Claim
19 words
A total heat exchanger according to claim 1, wherein said hydrophilic material is in the form of a film.
Claim 5
Dependent Claim
90 words
A total heat exchanger according to claim 1, wherein said support members are composed of a plurality of corrugated spacer members inserted between said partition plates, said spacer members supporting and spacing said partition plates by placing the ridges of the corrugations thereof in contact with adjacent partition plates, and cooperating with said partition plates to define said two series of passages for said first and second gas flows, the directions of said two series of passages being defined by the directions of the ridges of said corrugated spacer members.
Claim 6
Dependent Claim
22 words
A total heat exchanger according to claim 1, wherein said carbon-fiber-based paperlike material is made from carbon fiber and fibrous binder material.
Claim 7
Dependent Claim
19 words
A total heat exchanger according to claim 5, wherein pulp fiber is further incorporated in said carbon-fiber-based paperlike material.
Claim 8
Dependent Claim
16 words
A total heat exchanger according to claim 1, wherein said carbon fiber is activated carbon fiber.
Claim 9
Dependent Claim
17 words
A total heat exchanger according to claim 1, wherein said partition plates are impregnated with lithium chloride.
Claim 10
Dependent Claim
17 words
A total heat exchanger according to claim 1, wherein said partition plates are impregnated with calcium chloride.
Claim 11
Dependent Claim
20 words
A total heat exchanger according to claim 1, wherein said partition plates are impregnated with lithium chloride and calcium chloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |