CPC F24H 8/006 (2013.01) [F24H 9/18 (2013.01); F28D 1/053 (2013.01); F28F 1/32 (2013.01); F28F 9/02 (2013.01); F28D 2021/0024 (2013.01)] | 13 Claims |
1. A heat exchanger unit comprising:
a sensible heat exchanger including a sensible heat exchange pipe disposed in a sensible heat exchange area and configured to receive water and allow the water to flow through the sensible heat exchange pipe and a plurality of sensible heat fins disposed in the sensible heat exchange area and formed in a plate shape across the sensible heat exchange pipe such that the sensible heat exchange pipe passes through the sensible heat fins, the sensible heat exchange area being configured to receive sensible heat generated by a combustion reaction and heat the water; and
a latent heat exchanger including a latent heat exchange pipe disposed in a latent heat exchange area and configured to receive the water and allow the water to flow through the latent heat exchange pipe and a plurality of latent heat fins disposed in the latent heat exchange area and formed in a plate shape across the latent heat exchange pipe such that the latent heat exchange pipe passes through the latent heat fins, wherein the latent heat exchange area is located downstream of the sensible heat exchange area with respect to a reference direction that is a flow direction of combustion gas generated during the combustion reaction, the latent heat exchange area being configured to receive latent heat generated during a phase change of the combustion gas and heat the water,
wherein the plurality of latent heat fins form at least one layer in which latent heat fins located in the same position with respect to the reference direction are disposed, and
wherein the total number of sensible heat fins is larger than the total number of latent heat fins disposed in a layer at the most downstream side with respect to the reference direction, or a distance by which the latent heat fins disposed in the layer at the most downstream side are spaced apart from each other is longer than a distance by which the sensible heat fins are spaced apart from each other.
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