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AssigneeGränges AB
InventorsSampath Desikan, Xu House, Steven Meijers
Estimating the term…
Compact aluminum heat exchanger manufactured from welded flat tubes with internal and/or external fins for cooling of power electronic devices and/or battery cells. The fin insert is prefabricated and inserted into the flat tubes for facilitating of flow turbulence and thus heat dissipation and have fins with undulating or wavelike shape manufactured by sampling or corrugating. Flat tubes are bent and welded along their length on their smaller side facilitating mechanical strength of the tubes. Tubes are manufactured from a core alloy containing 0.3 to 1.8 wt % Mn, 0.25-1.2 wt % Cu, ≧0.02 wt % Mg, ≧0.01 wt % Si, ≧0.05 wt % Fe, ≦0.2 wt % Cr, balance aluminum and unavoidable impurities up to 0.05 wt %. Fin inserts are manufactured from aluminum alloy comprising Mn 0-3 wt %, Fe 0-1.5 wt %, Cu 0-1.5 wt %, Mg 0-1.5 wt %, Si 0-1.0 wt %, Zn 0-4 wt %, Ni 0-1 wt % and Zr, Ti, Cr V 0-0.3 wt % each.
A heat exchanger (20) for thermal management of heat radiating components (5,6) comprising:
The heat exchanger (20) according to any of the previous claims, wherein at least one tube (3) has inserted a pre-fabricated internal fin insert (8).
The heat exchanger (20) according to any of the previous claims, wherein at least some of the cooling tubes (3) are separated by a row of brazed external fins (4).
The heat exchanger (20) according to any of the previous claims, wherein the core alloy of the high frequency welded tube (3) sheet (11) contains 0.3 to 1.8 wt % Mn, 0.25-1.2 wt % Cu, ≧0.02-wt, ≧0.02 wt % Mg, ≧0.01 wt % Si, ≧0.05 wt % Fe, ≦0.25 wt % Cr, balance aluminum and unavoidable impurities up to 0.05 wt %.
The heat exchanger (20) according to any of the previous claims, wherein the core alloy of the tube material sheet (11) temper is H14/O/H24.
The heat exchanger (20) according to any of the previous claims, wherein the wall thickness of the cooling flat tube (3) is 0.1-1.5 mm, preferably 0.8-1, 5 mm.
The heat exchanger (20) according to any of the previous claims, wherein the height of the cooling tube (3) is 1.2-15 mm.
The heat exchanger (20) according to any of the previous claims, wherein the frequency welded cooling flat tubes 83) have a braze cladding on at least one side.
The heat exchanger (20) according to any of the previous claims, wherein the fin insert has braze filler alloy cladding on at least one side (9, 10).
The heat exchanger (20) according to any of the previous claims, wherein the braze filler alloy has Mg content of 0.05-0.7 wt % Mg.
Dependencies are inferred from the claim text.