US 12,287,157 B1
Method of heat exchanger assembly
Leon Sanders, Auburn, WA (US)
Filed by Leon Sanders, Auburn, WA (US)
Filed on Aug. 5, 2022, as Appl. No. 17/881,602.
Claims priority of provisional application 63/256,635, filed on Oct. 18, 2021.
Int. Cl. F28D 7/10 (2006.01); B23P 15/26 (2006.01)
CPC F28D 7/10 (2013.01) [B23P 15/26 (2013.01); F28F 2275/045 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for heat exchanger construction comprising:
inserting a plurality of tubes through corresponding apertures in a first tube sheet,
inserting the plurality of tubes through corresponding apertures in a second tube sheet,
injecting a brazing material combined with a fluid carrier into a fill channel in the first tube sheet,
heating the tube sheets to a melting temperature of the brazing material, and
evaporating the fluid carrier used to inject and distribute brazing material into the fill channel.
 
8. A method for heat exchanger construction comprising:
inserting a plurality of tubes through corresponding apertures in a first tube sheet,
inserting the plurality of tubes through corresponding apertures in a second tube sheet,
injecting a brazing material into a fill channel in the first tube sheet,
heating the tube sheets to a melting temperature of the brazing material, and
evaporating a fluid carrier used to inject and distribute brazing material into the fill channel, and
heating the brazing material until the brazing material is drawn into a space between the first tube sheet and the second tube sheet and leaving a leak path open.