US 12,305,886 B2
Heating systems with unhoused centrifugal fan and wraparound heat exchanger
Robert L. Long, Fort Smith, AR (US)
Assigned to Rheem Manufacturing Company, Atlanta, GA (US)
Filed by Rheem Manufacturing Company, Atlanta, GA (US)
Filed on Dec. 14, 2020, as Appl. No. 17/120,866.
Prior Publication US 2022/0186979 A1, Jun. 16, 2022
Int. Cl. F24H 3/04 (2022.01)
CPC F24H 3/04 (2013.01) 19 Claims
OG exemplary drawing
 
1. A heat exchanger assembly comprising:
an outer housing comprising an upstream section and a lower section, wherein the upstream section comprises an evaporator, and wherein the lower section comprises a condenser unit;
a burner assembly;
a heat exchanger tube comprising a first section positioned at a first distance from the burner assembly comprising an ingress disposed adjacent to a first side of the heat exchanger assembly, a second section positioned at a second distance from the burner assembly comprising an egress disposed adjacent to the first side of the heat exchanger assembly, and a curved section disposed between the first section and the second section, wherein a first end of the first section connects to a first end of the curved section, wherein a first end of the second section connects to a second end of the curved section, wherein the first section, the second section, and the curved section form a U-shape extending from the ingress to the egress, and wherein the second distance is greater than the first distance; and
a centrifugal fan positioned between the first section and the second section and configured to pull in air from a fan inlet and disperse air across the first section, the second section, and the curved section;
wherein the heat exchanger tube loops around the centrifugal fan; and
wherein a center portion of the centrifugal fan is positioned at a third distance from the first section and at a fourth distance from the second section, wherein the fourth distance is greater than the third distance.