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US 6,585,034 B2Granted
Heat exchanger
AssigneeROLLS-ROYCE plc
InventorJames I Oswald
Life of this patent
Estimating the term…
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AssigneeROLLS-ROYCE plc
InventorJames I Oswald
Estimating the term…
The spiral heat exchanger (10) has a hot end (16) and a cold end (18) arranged at opposite ends of the heat exchanger (10). A first, relatively hot, fluid is supplied to the hot end (16) of the heat exchanger (10) and the first fluid is removed from the cold end (18) of the heat exchanger (10). The heat exchanger (10) comprises first and second metal sheets (12,14). Each metal sheet (12,14) has hot and cold edge portions (18,20) at the hot and cold ends (16,18) respectively of the heat exchanger (10). Both of the hot and cold edge portions (18) of the first metal sheet (12) are thinner and have a greater diameter than the remainder of the first metal sheet (12) such that both of the hot and cold edge portions (18) contact the hot and cold edge portions (20) of the second sheet (14). The hot and cold edge portions (18) of the first metal sheet are joined to the hot and cold edge portions (20) of the second metal sheet (14).
A heat exchanger having a hot end and a cold end, the heat exchanger comprising a first sheet and a second sheet, the first and second sheets being wound around an axis, the hot and cold ends of the heat exchanger being arranged at the axial ends of the heat exchanger, each sheet having hot and cold edge portions at the hot and cold ends respectively of the heat exchanger, at least one of the hot and cold edge portions of the first sheet being thinner and having a greater diameter than the remainder of the first sheet such that the at least one of the hot and cold edge portions of the first sheet contacts at least one of the hot and cold edge portions of the second sheet, the hot and cold edge portions of the first sheet being joined to the hot and cold edge portions of the second sheet.
A method of manufacturing a heat exchanger, the heat exchanger having a hot end and a cold end, the hot and cold ends of the heat exchanger being arranged at the axial ends of the heat exchanger, comprising forming a first sheet, the first sheet having hot and cold edge portions, thinning at least one of the hot and cold edge portions of the first sheet such that the at least one of the hot and cold edge portions is thinner and longer than the remainder of the first sheet, forming a second sheet, the second sheet having hot and cold edge portions, arranging the first and second sheets around an axis such that the first sheet is within the second sheet and such that the at least one of the hot and cold edge portions of the first sheet has a greater diameter than the remainder of the first sheet such that the at least one of the hot and cold edge portions of the first sheet contacts the at least one of the hot and cold edge portions of the second sheet, and joining the hot and cold edge portions of the first sheet to the hot and cold edge portions of the second sheet.
Dependencies are inferred from the claim text.