Heat exchanger and hot water apparatus
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United States of America Patent
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Jul 16, 2019
Grant Date -
Jun 29, 2017
app pub date -
Dec 9, 2016
filing date -
Dec 25, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
According to the present invention, a heat exchanger comprises a fin having a plurality of through holes. The plurality of through holes include mutually adjacent first and second through holes disposed on a side closest to a heating gas's inlet side. The fin has a slit located between the first through hole and the second through hole and cut into the fin from an edge thereof located on the heating gas's inlet side to a side farther from the heating gas's inlet side than a reference line connecting a center of the first through hole and a center of the second through hole. Furthermore, the fin has at least one opening between the slit and the first and second through holes. The opening includes a first opening having a portion located on the side farther from the heating gas's inlet side than the reference line.
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