US 11,988,457 B2
Coaxial tube arrangement
Andreas Draenkow, Heimsheim (DE); Timo Feldkeller, Asperg (DE); and Thomas Merten, Knittlingen (DE)
Assigned to Mahle International GmbH, (DE)
Filed by Mahle International GmbH, Stuttgart (DE)
Filed on Aug. 24, 2022, as Appl. No. 17/895,031.
Claims priority of application No. 10 2021 209 342.6 (DE), filed on Aug. 25, 2021.
Prior Publication US 2023/0064641 A1, Mar. 2, 2023
Int. Cl. F28D 7/10 (2006.01); F16L 9/19 (2006.01); F28D 1/053 (2006.01); F28D 1/02 (2006.01)
CPC F28D 7/106 (2013.01) [F16L 9/19 (2013.01); F28D 1/05341 (2013.01); F28D 2001/0266 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A coaxial tube arrangement for a heat exchanger, comprising:
a coaxial tube including an inner core channel and an outer annular channel;
at least one closing cover closing the coaxial tube at a longitudinal end side;
the at least one closing cover having a base region and a circumferential edge, the base region aligned transversely to a flow direction through the coaxial tube, the circumferential edge aligned with the flow direction and facing the coaxial tube;
a thickness, which is defined transversely to the flow direction, of the circumferential edge is equal to or greater than a height of the annular channel, which is defined transversely to the flow direction; and
wherein the circumferential edge of the at least one closing cover covers the annular channel transversely to the flow direction and separates the annular channel from the core channel in a fluid-tight manner.