HEAT EXCHANGER
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United States of America Patent
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app pub date -
Oct 18, 2012
filing date -
Jun 15, 2007
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Abandoned
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Abstract
A heat exchanger applied to a boiler that can improve heat transfer efficiency by reducing the distance between the heat exchange pipes while making a long heating water passage through heat exchange pipes, which can be easily manufactured. Additionally, the heat exchanger includes a heat exchange device, first and second subsidiary plates, and first and second end plates. The heat exchange device includes a plurality of heat exchange pipe units through which heating water passes and which are spaced apart from each other at regular intervals. The heat exchange pipe units are provided between a heating water inlet and a heating water outlet, and are formed of pipes having a rectangular cross-section of which a side coming in contact with the combustion gas has a width large than the height.
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