Patent US4799539A successfully refreshed from Google Patents.
US4799539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally efficient room ventilator
Assignee: Advanced Design and Manufacture Ltd
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Filing: 1987-06-01
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Granted: 1989-01-24
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Expires: 2007-06-01
Abstract
Abstract A room ventilator for insertion within a wall of window of the room comprises two fans mounted side by side, and a heat exchanger located inwardly of the fans. The construction of the heat exchanger is such that counter flow heat exchange occurs between the incoming and outgoing air streams.
Inventors
- 👤 Howard S. Atkin
- 👤 Christopher J. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:46
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/30; F24F12/00; F24F12/001; F28; F28D; F28D9/00; F28D9/0031; F28D9/0037; F28D9/0062; F28F; F28F2250/00; F28F2250/10; F28F2250/108; Y; Y02; Y02B; Y02B30/00; Y02B30/56; Y10; Y10S; Y10S165/00; Y10S165/909
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
224 words
Apparatus for extracting stale air from inside a room and introducing fresh air into the room, the apparatus comprising: an enclosure adapted to be mounted within a wall or window of the room with a first end open to the exterior of the room and a second end open to the interior of the room; a fresh air inlet and a stale air outlet located at said first end; a stale air inlet and a fresh air outlet located at said second end; a first fan located adjacent said fresh air inlet and operable to introduce fresh air into the room.; a second fan located adjacent said stale air outlet and operable to extract stale air from inside the room; and a counter flow heat exchanger located between said first and second ends, the heat exchanger including two separate flow paths therethrough, one connecting the fresh air inlet with the fresh air outlet and the other connecting the stale air inlet with the stale air outlet, the two flow paths being substantially parallel to each other and extending perpendicularly to the wall in which it is adapted to be installed, and being separated from each other by a thermally conducting material across which, in use, counter flow heat exchange occurs between the fresh air and the stale air flowing in parallel but opposite directions.
Claim 2
Dependent Claim
224 words
Apparatus for extracting stale air from inside a room and introducing fresh air into the room, the apparatus comprising: an enclosure adapted to be mounted within a wall or window of the room with a first end open to the exterior of the room and a second end open to the interior of the room; a fresh air inlet and a stale air outlet located at said first end; a stale air inlet and a fresh air outlet located at said second end; a first fan located adjacent said fresh air inlet and operable to introduce fresh air into the room.; a second fan located adjacent said stale air outlet and operable to extract stale air from inside the room; and a counter flow heat exchanger located between said first and second ends, the heat exchanger including two separate flow paths therethrough, one connecting the fresh air inlet with the fresh air outlet and the other connecting the stale air inlet with the stale air outlet, the two flow paths being substantially parallel to each other and extending perpendicularly to the wall in which it is adapted to be installed, and being separated from each other by a thermally conducting material across which, in use, counter flow heat exchange occurs between the fresh air and the stale air flowing in parallel but opposite directions.
Claim 3
Dependent Claim
72 words
Apparatus according to claim 1 in which the heat exchanger is provided with alternately interleaved first and second types of plates, each plate bearing a series of laterally spaced apart parallel hollow ribs extending from one end of the heat exchanger to the other along said flow paths and the ribs of each plate of the first type being laterally offset from the ribs of each adjacent plate of the second type.
Claim 4
Dependent Claim
45 words
Apparatus according to claim 2, in which the lateral spacing between the ribs of the plates of the first type and the ribs of the adjacent plate of the second type is equal to one half of the spacing between the ribs of each plate.
Claim 5
Dependent Claim
39 words
Apparatus according to claim 2, in which the wall thickness of the hollow ribs in each plate is considerably less than the thickness of the rest of the plate to promote heat exchange through the walls of the ribs.
Claim 6
Dependent Claim
65 words
Apparatus according to claim 1, in which the plates are vertically spaced apart to allow air flow therebetween, the space between any two adjacent plates being sealed on one side of the heat exchanger at one end thereof and sealed on the opposite side of the heat exchanger at the other end thereof, thereby forming two separate flow paths for the fresh and stale air.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 1, in which the two fans are mounted side by side at the first end of the enclosure.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 1, in which the enclosure is adjustable in length to suit varying wall or window thicknesses.
Claim 9
Dependent Claim
20 words
Apparatus according to claim 1, in which a spray suppression member is provided between the heat exchanger and the fans.
Claim 10
Dependent Claim
16 words
Apparatus according to claim 1, in which the enclosure slopes downwardly towards the first end thereof.
Claim 11
Independent Claim
162 words
A method of extracting stale air from inside a room and introducing fresh air into the room, the method comprising drawing fresh air, by means of a first fan, through a fresh air inlet in a first end of enclosure mounted in a wall or window of the room, passing said fresh air through a counter flow heat exchanger in first direction perpendicular to said wall or window to exit from a fresh air outlet in a second end of said enclosure, and simultaneously drawing stale air by means of a second fan, through a stale air inlet in said second end of said enclosure, passing said stale air through the heat exchanger in a second direction opposite but parallel to said first direction and perpendicular to said wall or window to exit from a stale air outlet in aid first end of said enclosure, whereby heat exchanger is effected in counter flow fashion between said fresh air and said stale air.
Claim 12
Independent Claim
162 words
A method of extracting stale air from inside a room and introducing fresh air into the room, the method comprising drawing fresh air, by means of a first fan, through a fresh air inlet in a first end of enclosure mounted in a wall or window of the room, passing said fresh air through a counter flow heat exchanger in first direction perpendicular to said wall or window to exit from a fresh air outlet in a second end of said enclosure, and simultaneously drawing stale air by means of a second fan, through a stale air inlet in said second end of said enclosure, passing said stale air through the heat exchanger in a second direction opposite but parallel to said first direction and perpendicular to said wall or window to exit from a stale air outlet in aid first end of said enclosure, whereby heat exchanger is effected in counter flow fashion between said fresh air and said stale air.
Claim 13
Dependent Claim
176 words
Apparatus for extracting stale air from inside a room and introducing fresh air into the room, the apparatus comprising: an enclosure adapted to be mounted within a wall or window of the room with a first end open to the exterior of the room and a second end open to the interior of the room; a fresh air inlet and a stale air outlet located at said first end; a first fan located adjacent said fresh air inlet and operable to introduce fresh air into the room; a second fan located adjacent said stale air outlet and operable to extract stale air from inside the room; and a counter flow heat exchanger located between said first and second ends, the heat exchanger comprising alternatively interleaved first and second types of plates, each plate bearing a series of laterally spaced apart hollow ribs extending from one end of the heat exchanger to the other, the ribs of each plate of the first type being laterally offset from the ribs of each adjacent plate of the second type.
Claim 14
Dependent Claim
176 words
Apparatus for extracting stale air from inside a room and introducing fresh air into the room, the apparatus comprising: an enclosure adapted to be mounted within a wall or window of the room with a first end open to the exterior of the room and a second end open to the interior of the room; a fresh air inlet and a stale air outlet located at said first end; a first fan located adjacent said fresh air inlet and operable to introduce fresh air into the room; a second fan located adjacent said stale air outlet and operable to extract stale air from inside the room; and a counter flow heat exchanger located between said first and second ends, the heat exchanger comprising alternatively interleaved first and second types of plates, each plate bearing a series of laterally spaced apart hollow ribs extending from one end of the heat exchanger to the other, the ribs of each plate of the first type being laterally offset from the ribs of each adjacent plate of the second type.
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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) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |