US7036565B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust heat exchanger
Assignee: Modine Manufacturing Co
•
Filing: 2004-06-09
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Granted: 2006-05-02
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Expires: 2024-06-09
Abstract
Abstract A housingless heat exchanger including a stack of flat tubes with at least two being cooling tubes and at least one being a bypass tube. Collecting tanks are on the tube ends and diffuse gas streaming in the tube flow paths. The flat tubes each comprise a connected pair of plates defining a flow path, and an enclosed space is defined between adjacent flat tubes. Coolant inlet and outlet channels are formed by connected plate openings connect to the enclosed space between the cooling tubes whereby coolant flows through that enclosed space. A switching valve in one collecting tank is movable between a cooling position in which the gas streams through the cooling tubes and a bypass position in which the gas streams through the bypass tube. A closure in the coolant inlet and outlet channels blocks coolant from adjacent the bypass tube. An insulating plate may also, or alternatively, be between the bypass tube and the cooling tube adjacent the bypass tube to block heat exchange between coolant and the bypass tube.
Inventors
- 👤 Viktor Brost
- 👤 Roland Strähle
- 👤 Thomas Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:24
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0043; F02; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/25; F02M26/26; F02M26/28; F28F; F28F27/00; F28F27/02; F01; F01N; F01N2240/00; F01N2240/02; F28D21/00; F28D21/0001; F28D21/0003; F28F2250/00; F28F2250/06; F28F2250/10; F28F2250/104
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
183 words
A housingless heat exchanger, comprising: a stack of flat tubes with at least two of said tubes being cooling tubes and at least one of said flat tubes being a bypass tube, wherein each of said flat tubes comprise a pair of plates connected to define a flow path therethrough, and an enclosed space is defined by facing ones of said plates between adjacent flat tubes; at least one collecting tank on one end of the stack of flat tubes for gas streaming in said tube flow paths; coolant inlet and outlet channels formed by connected openings in the plates, said channels being hydraulically connected to said enclosed space between the cooling tubes whereby coolant flows through said enclosed space between said cooling tubes; a switching valve in the collecting tank movable between a cooling position in which at least most of the gas streams through the cooling tubes and a bypass position in which at least most of the gas streams through the bypass tube; and a closure in said coolant inlet and outlet channels blocking coolant from adjacent the bypass tube.
Claim 2
Dependent Claim
183 words
A housingless heat exchanger, comprising: a stack of flat tubes with at least two of said tubes being cooling tubes and at least one of said flat tubes being a bypass tube, wherein each of said flat tubes comprise a pair of plates connected to define a flow path therethrough, and an enclosed space is defined by facing ones of said plates between adjacent flat tubes; at least one collecting tank on one end of the stack of flat tubes for gas streaming in said tube flow paths; coolant inlet and outlet channels formed by connected openings in the plates, said channels being hydraulically connected to said enclosed space between the cooling tubes whereby coolant flows through said enclosed space between said cooling tubes; a switching valve in the collecting tank movable between a cooling position in which at least most of the gas streams through the cooling tubes and a bypass position in which at least most of the gas streams through the bypass tube; and a closure in said coolant inlet and outlet channels blocking coolant from adjacent the bypass tube.
Claim 3
Dependent Claim
42 words
The heat exchanger of claim 1 , wherein the enclosed space between said bypass tube and the cooling tube adjacent said bypass tube includes at least a portion adjacent said bypass tube, and said closure blocks coolant from said enclosed space portion.
Claim 4
Dependent Claim
18 words
The heat exchanger of claim 1 , wherein the cooling and bypass tubes have substantially the same configuration.
Claim 5
Dependent Claim
25 words
The heat exchanger of claim 3 , wherein said pairs of plates of said cooling and bypass tubes are substantially the same as each other.
Claim 6
Dependent Claim
26 words
The heat exchanger of claim 1 , wherein said at least one bypass tube has a larger cross-section than at least one of the cooling tubes.
Claim 7
Dependent Claim
30 words
The heat exchanger of claim 1 , wherein the plates of said pairs of plates are joined about their edges, and said plates include contoured sections defining said enclosed spaces.
Claim 8
Dependent Claim
18 words
The heat exchanger of claim 1 , further comprising a insert between the plates in the cooling tubes.
Claim 9
Dependent Claim
26 words
The heat exchanger of claim 1 , wherein said closure includes an insulating plate between said bypass tube and said cooling tube adjacent said bypass tube.
Claim 10
Dependent Claim
46 words
The heat exchanger of claim 8 , wherein said insulating plate separates said enclosed space between said bypass tube and said cooling tube adjacent said bypass tube, whereby a coolant flow path is defined between said insulating plate and said cooling tube adjacent said bypass tube.
Claim 11
Dependent Claim
32 words
The heat exchanger of claim 9 , wherein an untraversed enclosed space is defined between said insulating plate and said bypass tube, and said closure blocks coolant from said untraversed enclosed space.
Claim 12
Dependent Claim
14 words
The heat exchanger of claim 10 , wherein the untraversed space has heat-insulating properties.
Claim 13
Dependent Claim
30 words
The heat exchanger of claim 8 , wherein said insulating plate includes an end protruding beyond said stack of flat tubes, and said protruding end cooperates with the switching valve.
Claim 14
Dependent Claim
42 words
The heat exchanger of claim 12 , wherein said switching valve includes a flap, and said flap cooperates with said insulating plate end to either close the cooling tubes in said bypass position or close said bypass tube in said cooling position.
Claim 15
Dependent Claim
25 words
The heat exchanger of claim 8 , wherein the switching valve includes a flap having an axis substantially in the plane of the insulating plate.
Claim 16
Dependent Claim
198 words
A housingless heat exchanger, comprising: a stack of flat tubes with at least two of said tubes being cooling tubes and at least one of said flat tubes being a bypass tube, wherein each of said flat tubes being substantially identical and comprising a pair of plates connected to define a flow path therethrough, and an enclosed space is defined by facing ones of said plates between adjacent flat tubes; at least one collecting tank on one end of the stack of flat tubes for gas streaming in said tube flow paths; coolant inlet and outlet channels formed by connected openings in the plates, said channels being hydraulically connected to said enclosed space between the cooling tubes whereby coolant flows through said enclosed space between said cooling tubes; a switching valve in the collecting tank movable between a cooling position in which at least most of the gas streams through the cooling tubes and a bypass position in which at least most of the gas streams through the bypass tube; and an insulating plate between said bypass tube and said cooling tube adjacent said bypass tube, said insulating plate blocking heat exchange between coolant and said bypass tube.
Claim 17
Dependent Claim
198 words
A housingless heat exchanger, comprising: a stack of flat tubes with at least two of said tubes being cooling tubes and at least one of said flat tubes being a bypass tube, wherein each of said flat tubes being substantially identical and comprising a pair of plates connected to define a flow path therethrough, and an enclosed space is defined by facing ones of said plates between adjacent flat tubes; at least one collecting tank on one end of the stack of flat tubes for gas streaming in said tube flow paths; coolant inlet and outlet channels formed by connected openings in the plates, said channels being hydraulically connected to said enclosed space between the cooling tubes whereby coolant flows through said enclosed space between said cooling tubes; a switching valve in the collecting tank movable between a cooling position in which at least most of the gas streams through the cooling tubes and a bypass position in which at least most of the gas streams through the bypass tube; and an insulating plate between said bypass tube and said cooling tube adjacent said bypass tube, said insulating plate blocking heat exchange between coolant and said bypass tube.
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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) | 2009-05-01 | 2009-10-31 | 2010-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-05-01 | 2013-10-31 | 2014-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-05-01 | 2017-10-31 | 2018-05-02 | $7700.00 | Window Closed / Lapsed |