Heat exchanger, refrigeration cycle apparatus, and method of manufacturing heat exchanger
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United States of America Patent
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Jan 23, 2018
Grant Date -
Jan 28, 2016
app pub date -
Dec 27, 2013
filing date -
Mar 21, 2013
priority date (Note) -
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Abstract
A heat exchanger includes a plurality of fins spaced apart from each other such that gas flows therebetween, and a plurality of heat transfer tubes extending through the plurality of fins and joined to the plurality of fins by tube expansion. The heat transfer tubes are arranged in five or more columns along a flow direction of the gas and staggered in a row direction intersecting the flow direction of the gas. Each of the plurality of fins is flat and plate-shaped and continuously extends between the heat transfer tubes in the flow direction of the gas. The plurality of heat transfer tubes satisfy relationships of 1.055D≦Da≦1.068D and 1.56Da≦L≦2.58Da, where D is an unexpanded outside diameter of the heat transfer tubes, Da is an expanded outside diameter thereof, and L is a distance between centers of adjacent two heat transfer tubes.
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