Patent ID: 9372011
Filing Date: 2016-06-21
CPC Classification: F24H,F28D,F28F

Claim Text:
1. A heat exchanger, comprising: at least two heat exchange shell enclosures; at least three rows of heat exchange tubes arranged along a furnace air flow path, wherein each of the heat exchange tubes defines a leaving-tube-end and an entering-tube-end, two adjacent rows of the at least three rows of heat exchange tubes being spaced from each other, the at least three rows of heat exchange tubes including a first row, a second row, and a third row, the first row connected in a leaving-tube-end to an entering-tube-end of the second row via a first of the at least two heat exchange shell enclosures, the second row connected in a leaving-tube-end to an entering-tube-end of the third row via a second of the at least two heat exchange shell enclosures such that the at least three rows of heat exchange tubes and the at least two heat exchange shell enclosures define a substantially serpentine flue gas passage that is configured to be downstream of a burner; and wherein each of the at least two heat exchange shell enclosures comprises a base casing and a cover casing, the cover casing is engaged with the base casing to define a communicating chamber, and the heat exchange tubes are connected with corresponding base casings such that the adjacent rows of heat exchange tubes are communicated with each other via the communicating chamber.