Patent US6983788B2 successfully refreshed from Google Patents.
US6983788B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating system, heat exchanger and methods
Assignee: Building Performance Equipment Inc
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Filing: 2001-04-10
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Granted: 2006-01-10
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Expires: 2021-04-10
Abstract
Abstract The ventilating system includes evaporative cooling of the exhaust air before it enters a heat exchanger to cool incoming fresh outside air. A suction fan pulls exhaust air through the heat exchanger and, in combination with a flow restrictor, reduces the pressure on the exhaust air and augments the evaporative cooling. The use of a pusher fan to force outside air through the heat exchanger ensures that any leakage in the heat-exchanger results in outside air entering exhaust air and minimizing the chances of contamination by leaking exhaust air into the incoming fresh air. The heat exchanger is made economically by heat-forming cavities in relatively thick thermo-plastic sheets, interleaving them with other thermoplastic sheets having separate gas flow conduit structures, and securing the sheets together. Preferably, the heat-exchanger is an opposed-flow heat-exchanger giving improved heat-transfer efficiency.
Inventors
- 👤 Klas C. Haglid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:27
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/0035; F24F12/00; F24F12/001; F24F12/006; F28; F28D; F28D5/00; F28D9/00; F28D9/0081; F28F; F28F21/00; F28F21/06; F28F21/065; F28F3/00; F28F3/02; F28F3/04; F24F6/00; F24F6/12; F24F6/14; F24F2006/146; F24F2012/007; F28F2250/00; F28F2250/10; F28F2250/102; Y; Y02; Y02B; Y02B30/00; Y02B30/54; Y02B30/56; Y10; Y10S; Y10S165/00; Y10S165/905; Y10S165/909; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313; Y10T156/1317; Y10T156/1322; Y10T156/1326; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49359; Y10T29/49361; Y10T29/49377; Y10T29/49391
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
222 words
A heat exchanger comprising in combination, a plurality of panels of thermoplastic material having dispersed air-filled cavities, each of said panels having two opposed broad surfaces and at least one edge, each of said broad surfaces having a greater surface area than said edge, selected ones of said panels having at least one indentation in at least one of said broad surfaces, said indentation forming a gas flow passage cavity, others of said panels each having at least one gas flow conduit structure forming at least one gas flow conduit, said selected ones of said panels being interleaved with said others of said panels in a predetermined sequence, said panels being assembled with said broad surfaces of said panels joined together so that said gas flow passage cavity in each of said selected panels forms a gas flow passageway with one of said broad surfaces of an adjoining one of said other panels, said gas flow passageways in said selected panels and said gas flow conduits in said other panels are positioned to conduct gases in substantially opposite directions over a substantial portion of their lengths, said heat exchanger having a housing with at least one solid integral side wall formed by said edges of said panels being aligned with one another and fused together over a substantial portion of their lengths.
Claim 2
Dependent Claim
222 words
A heat exchanger comprising in combination, a plurality of panels of thermoplastic material having dispersed air-filled cavities, each of said panels having two opposed broad surfaces and at least one edge, each of said broad surfaces having a greater surface area than said edge, selected ones of said panels having at least one indentation in at least one of said broad surfaces, said indentation forming a gas flow passage cavity, others of said panels each having at least one gas flow conduit structure forming at least one gas flow conduit, said selected ones of said panels being interleaved with said others of said panels in a predetermined sequence, said panels being assembled with said broad surfaces of said panels joined together so that said gas flow passage cavity in each of said selected panels forms a gas flow passageway with one of said broad surfaces of an adjoining one of said other panels, said gas flow passageways in said selected panels and said gas flow conduits in said other panels are positioned to conduct gases in substantially opposite directions over a substantial portion of their lengths, said heat exchanger having a housing with at least one solid integral side wall formed by said edges of said panels being aligned with one another and fused together over a substantial portion of their lengths.
Claim 3
Dependent Claim
41 words
A heat-exchanger as in claim 1 in which each of said gas flow cavities includes a mid-section and two end sections, the gas flow passage provided in each of said end sections extending away from said mid-section at a substantial angle.
Claim 4
Dependent Claim
27 words
A heat-exchanger as in claim 1 in which the edges of the ends of said gas flow passages are fused together with said gas flow passages open.
Claim 5
Dependent Claim
26 words
A heat-exchanger as in claim 1 in which at least said other panels each comprise a plurality of elongated tubes secured together to form said panel.
Claim 6
Dependent Claim
27 words
A heat-exchanger as in claim 1 in which said panels are selected from the group consisting of expanded plastic panels and panels formed of elongated plastic tubes.
Claim 7
Dependent Claim
33 words
A heat-exchanger as in claim 1 including indentations in both of said broad surfaces of each of said selected ones of said panels to form gas flow cavities in each of said surfaces.
Claim 8
Dependent Claim
50 words
A heat-exchanger as in claim 1 in which said gas flow conduit structure in each of said other panels is selected from the group consisting of a plurality of side-by-side thermoplastic tubes and at least one indentation forming a gas flow cavity in at least one of said broad surfaces.
References Cited (Backward Citations)
DE204310C
Cited
US2247542A
Cited
US1662870A
Cited
GB272926A
Cited
DE540204C
Cited
GB1354502A
Cited
DE2425261A1
Cited
US3912004A
Cited
US4293027A
Cited
US4174987A
Cited
JPS55160297A
Cited
FR2469684A1
Cited
JPS5680644A
Cited
JPS571731A
Cited
EP0044561A2
Cited
DE3030778A1
Cited
JPS5755338A
Cited
US4475589A
Cited
US4461344A
Cited
DE3128684A1
Cited
JPS5843398A
Cited
US4451344A
Cited
US4858685A
Cited
SU1083033A1
Cited
US4653574A
Cited
JPS60142199A
Cited
US4616695A
Cited
EP0184887A1
Cited
FR2576679A1
Cited
US4820468A
Cited
US4820458A
Cited
US4841738A
Cited
EP0315052A1
Cited
WO1989005433A1
Cited
US5024263A
Cited
US5195240A
Cited
GB2218794A
Cited
JPH01318821A
Cited
US5078208A
Cited
JPH03271896A
Cited
US5123595A
Cited
JPH04273993A
Cited
US5348077A
Cited
JPH04313693A
Cited
JPH0534089A
Cited
JPH05157480A
Cited
US5193610A
Cited
US5474639A
Cited
US5239834A
Cited
US5431215A
Cited
US5497823A
Cited
US5927387A
Cited
JPH1047884A
Cited
EP0871005A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-01-09 | 2009-07-11 | 2010-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-09 | 2013-07-11 | 2014-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-09 | 2017-07-11 | 2018-01-10 | $7700.00 | Window Closed / Lapsed |