Heat exchanger and gas-fired furnace comprising the same
AssigneeGd Midea Heating & Ventilating Equipment Co., Ltd.
InventorsChaojing CHEN, Jianmin ZHANG, Junhua HE, Feihang LI
Life of this patent
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Abstract
A heat exchanger and a gas-fired furnace including the same are provided. The heat exchanger includes at least two heat exchange shell enclosures; and at least three rows of heat exchange tubes arranged along a furnace air flow path. Each of the heat exchange tubes defines a leaving-tube-end and an entering-tube-end, two adjacent rows are spaced from each other, the at least three rows of heat exchange tubes are connected in a leaving-tube-end to entering-tube-end fashion sequentially via the at least two heat exchange shell enclosures to define a substantially serpentine flue gas passage.
Claims20
A heat exchanger, comprising:
- at least two heat exchange shell enclosures;
- and
- 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 are spaced from each other, the at least three rows of heat exchange tubes are connected in a leaving-tube-end to entering-tube-end fashion sequentially via the at least two heat exchange shell enclosures to define a substantially serpentine flue gas passage.
A gas-fired furnace, comprising:
- a furnace body;
- a burner disposed in the furnace body;
- a heat exchanger connected with an outlet of the burner, wherein the heat exchanger comprises 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 are spaced from each other, the at least three rows of heat exchange tubes are connected in a leaving-tube-end to entering-tube-end fashion sequentially via the at least two heat exchange shell enclosures to define a substantially serpentine flue gas passage;
- a secondary coil connected with the heat exchanger;
- an air ventilation fan disposed below the secondary coil;
- and
- a flue gas inducer disposed at a side of the secondary coil.
Dependencies are inferred from the claim text.