Patent US4449992A successfully refreshed from Google Patents.
US4449992A
Expired / Lapsed
US
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Heat-and-moisture exchanger
Assignee: Teijin Ltd
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Filing: 1981-01-05
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Granted: 1984-05-22
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Expires: 2001-01-05
Abstract
Abstract A heat-and-moisture exchanger including a thin film-like porous material as a partitioning element for heat and moisture exchanges between two gases, said porous material containing numerous pores having an average diameter of not more than 5 microns and opened to both surfaces thereof, and having a thickness of not more than 500 microns, a specific surface area of at least 0.3 m 2 /g, and a gas permeability having a value of at least 50 seconds/100 cc. This heat-and-moisture exchanger is used in a ventilating device and an air-conditioner.
Inventors
- 👤 Takeyoshi Yamada
- 👤 Shizuka Kurisu
- 👤 Shizuo Azuma
- 👤 Shoji Kawase
- 👤 Makoto Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0015; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/147
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A heat-and-moisture exchanger comprising a thin film-like porous material as a stationary partitioning element for heat and moisture exchanges between two gases separated by said porous material, said porous material containing numerous pores having an average diameter of not more than 5 microns and opened to both surfaces thereof, and having a thickness of not more than 500 microns, a specific surface area of at least 0.3 m 2 /g, and a gas permeability having a value of at least 100 seconds/100 cc.
Claim 2
Dependent Claim
83 words
A heat-and-moisture exchanger comprising a thin film-like porous material as a stationary partitioning element for heat and moisture exchanges between two gases separated by said porous material, said porous material containing numerous pores having an average diameter of not more than 5 microns and opened to both surfaces thereof, and having a thickness of not more than 500 microns, a specific surface area of at least 0.3 m 2 /g, and a gas permeability having a value of at least 100 seconds/100 cc.
Claim 3
Dependent Claim
28 words
The heat-and-moisture exchanger of claim 1 wherein said numerous pores opened to both surfaces of said porous material have an average diameter of not more than 2 microns.
Claim 4
Dependent Claim
24 words
The heat-and-moisture exchanger of claim 1 wherein said thin film-like porous material has a specific surface area of at least 0.5 m 2 /g.
Claim 5
Dependent Claim
24 words
The heat-and-moisture exchanger of claim 1, 2 or 3 wherein said thin film-like porous material has a thickness of not more than 200 microns.
Claim 6
Dependent Claim
24 words
The heat-and-moisture exchanger of claim 1, 2 or 3 wherein said thin film-like porous material is composed of a synthetic or semisynthetic organic polymer.
Claim 7
Dependent Claim
84 words
The heat-and-moisture exchanger of claim 1, 2 and 3 wherein said thin film-like porous material consists of two surface layers made of a porous film containing numerous pores having an average diameter of not more than 5 microns and an interlayer made of a reticulated structure containing numerous pores having an average diameter of at least 5 microns, and has a specific surface area of at least 0.3 m 2 /g and a gas permeability having a value of at least 100 seconds/100 cc.
Claim 8
Dependent Claim
10 words
A ventilating device including the heat-and-moisture exchanger of claim 1.
Claim 9
Dependent Claim
13 words
An air-conditioner including a heat exchanger and the heat-and-moisture exchanger of claim 1.
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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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |