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US 11,029,095 B2Granted
Finned coaxial cooler
AssigneeSenior UK Limited
InventorsCharles Penny, Adrian Ware, Ragu Subramanyam
Life of this patent
Estimating the term…
Abstract
A heat exchanger (100) for an exhaust gas recirculation system includes one or more rigid tubes (103), each having one or more internal cooling fins (111) that act as heat exchange surfaces to transfer heat from a gas to the walls of the rigid tubes. The rigid tubes are cooled by a liquid coolant contained within an outer jacket (113) surrounding the tubes. The rigid tubes may be straight and smooth, and may be alternated with one or more bellows sections (108, 104) which provide flexibility to the heat exchanger.
Claims22
A heat exchanger for cooling a hot gas using a liquid coolant, said heat exchanger comprising:
- an inner heat exchange tube adapted for exchanging heat between said gas and said liquid coolant;
- a tubular outer body surrounding at least part of said inner heat exchange tube, wherein said heat exchanger is configured to enable said gas to flow through said inner heat exchange tube and said liquid coolant to flow between said inner heat exchange tube and said tubular outer body;
- and
- a single fin component, said single fin component comprising:
- one or more fins of a first fin type being in contact with an inner surface of said inner heat exchange tube;
- and
- one or more fins of a second fin type also being in contact with said inner surface of said inner heat exchange tube,
- said one or more fins of the first fin type having a first length that extends inwardly by a first distance toward the central axis of said heat exchanger,
- said one or more fins of the second fin type having a second length that extends inwardly by a second distance toward the central axis of said heat exchanger, such that the first length and the first distance are different in value from the second length and the second distance,
- said one or more fins of the first fin type and said one or more fins of the second fin type being integrated to form the single fin component,
- said single fin component being configured to be fitted inside said inner heat exchange tube, and
- said single fin component comprising a resilient metal having resilience such as to cause said single fin component, upon insertion into said inner heat exchange tube, to expand outwardly, to thereby retain itself by friction inside said inner heat exchange tube.
9 more elements
A heat exchanger for cooling hot gas using a liquid coolant, said heat exchanger comprising:
- an inner heat exchange tube adapted for exchanging heat between a gas and a coolant;
- a tubular outer body surrounding at least part of said inner heat exchange tube, wherein said heat exchanger is configured to enable said gas to flow through said inner heat exchange tube and said coolant to flow between said inner heat exchange tube and said tubular outer body;
- and
- a single fin member which fits inside said inner heat exchange tube, said fin member comprising:
- a plurality of radially extending first walls each extending along an axial direction of at least a portion of said inner heat exchange tube, said first walls each having a first length that extends inwardly by a first distance towards the central axis of said inner heat exchange tube, and
- a plurality of radially extending second walls each extending along an axial direction of at least a portion of said inner heat exchange tube, said second walls each having a second length that extends inwardly by a second distance towards the central axis of said inner heat exchange tube, said first distance being different in value from said second distance, and
- a plurality of circumferentially extending connecting portions, each said connecting portion extending between and connecting an adjacent one of said radially extending first walls to an adjacent one of said radially extending second walls,
- wherein said fin member is of dimensions such as to fit within said inner heat exchange tube such that an outer surface of each said connecting portion is in contact with an inner surface of said inner heat exchange tube,
- wherein said fin member is formed from a single strip of resilient metal material having resilience, such as to wherein the resilience of said metal material causes said single fin member, upon insertion into said inner heat exchange tube, to expand outwardly, to thereby retain itself by friction inside said inner heat exchange tube.
6 more elements
Dependencies are inferred from the claim text.