Air conditioner with grooved inner heat exchanger tubes and grooved outer heat exchanger tubes
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United States of America Patent
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Oct 17, 2017
Issued Date -
N/A
app pub date -
Mar 15, 2013
filing date -
Nov 28, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
To increase a heat exchange capacity of an indoor heat exchanger without increasing a pressure loss inside tubes of an outdoor heat exchanger. A heat exchanger is constituted by an indoor machine equipped with an indoor heat exchanger 10 constituted by a plurality of heat transfer tubes 12A, which have a spiral grooves 13A formed with a predetermined lead angle Ra on inner faces of the tubes and are made to pierce a plurality of fins 11, and an outdoor machine equipped with an outdoor heat exchanger 20 constituted by a plurality of heat transfer tubes 22A which have a lead angle Rb of spiral grooves 23A smaller than that of a heat transfer tubes 10A used for the indoor heat exchanger 10 and are made to pierce a plurality of fins 11.
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