Air conditioner with grooved inner heat exchanger tubes and grooved outer heat exchanger tubes
AssigneeMitsubishi Electric Corporation
InventorSangmu Lee
Life of this patent
Estimating the term…
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.
Claims7
An air conditioner, comprising:
- an indoor machine equipped with an indoor heat exchanger constituted by a plurality of expanded heat transfer tubes which pierce a plurality of fins, and
- an outdoor machine equipped with an outdoor heat exchanger constituted by a plurality of expanded heat transfer tubes which pierce a plurality of fins, wherein
- the plurality of expanded heat transfer tubes of the indoor heat exchanger are expanded to be joined with the plurality of fins of the indoor heat exchanger and the plurality of expanded heat transfer tubes of the outdoor heat exchanger are expanded to be joined with the plurality of fins of the outdoor heat exchanger, and
- an inner diameter of the plurality of expanded heat transfer tubes of one of the outdoor heat exchanger and the indoor heat exchanger, in which a larger number of threads of spiral grooves are formed, is greater than an inner diameter of the plurality of expanded heat transfer tubes of an other of the outdoor heat exchanger and the indoor heat exchanger, in which a smaller number of threads of spiral grooves are formed.
A method for manufacturing an air conditioner including an indoor machine equipped with an indoor heat exchanger constituted by a plurality of heat transfer tubes which pierce a plurality of fins, and an outdoor machine equipped with an outdoor heat exchanger constituted by a plurality of heat transfer tubes which pierce a plurality of fins, the method comprising:
- joining the plurality of heat transfer tubes and the plurality of fins of the indoor heat exchanger by expanding the plurality of heat transfer tubes;
- and
- joining the plurality of heat transfer tubes and the plurality of fins of the outdoor heat exchanger by expanding the plurality of heat transfer tubes, wherein
- an expanded diameter of the plurality of heat transfer tubes of one of the outdoor heat exchanger and the indoor heat exchanger, in which a larger number of threads of spiral grooves are formed, is greater than an expanded diameter of the plurality of heat transfer tubes of an other of the outdoor heat exchanger and the indoor heat exchanger, in which a smaller number of threads of spiral grooves are formed.
Dependencies are inferred from the claim text.