US 11,835,307 B2
Applying coatings to the interior surfaces of heat exchangers
Divakar Mantha, Montgomery, AL (US); and Troy E. Trant, Montgomery, AL (US)
Assigned to Rheem Manufacturing Company, Atlanta, GA (US)
Filed by Rheem Manufacturing Company, Atlanta, GA (US)
Filed on Jul. 1, 2021, as Appl. No. 17/364,962.
Application 17/364,962 is a continuation of application No. 16/382,717, filed on Apr. 12, 2019, granted, now 11,054,199.
Prior Publication US 2021/0404754 A1, Dec. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F28F 19/06 (2006.01); C23C 8/16 (2006.01); C23C 18/18 (2006.01); F28F 19/02 (2006.01); C23C 18/16 (2006.01); C23C 18/50 (2006.01); C23C 8/50 (2006.01)
CPC F28F 19/06 (2013.01) [C23C 18/163 (2013.01); C23C 18/1616 (2013.01); C23C 18/1827 (2013.01); F28F 19/02 (2013.01); C23C 8/50 (2013.01); F28F 2245/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for coating an interior surface of a heat exchanger, the system comprising:
a tank for storing a coating solution, the tank comprising a source line and a return line;
a masking box configured to contain a heat exchanger, the heat exchanger having an outer surface comprising all exterior surfaces of the heat exchanger, and prevent the coating solution from contacting the outer surface of the heat exchanger when the masking box is immersed in the coating solution in the tank; and
a pump coupled to the tank, the pump configured to force the coating solution from the source line, through the heat exchanger, and through the return line to return the coating solution to the tank.