Heat exchanger and indoor unit provided with the same

摘要

A heat exchanger is provided in which a large number of plate-shaped fins are attached to outer peripheries of heat transfer tubes through which refrigerant flows. Three rows of heat transfer tubes are arranged along an air flow direction. An inlet side heat transfer tube in a case of using as an evaporator or an outlet side heat transfer tube in a case of using as a condenser has the smallest diameter. In a case where the most windward side heat transfer tube has the smallest diameter, a tube diameter of the most windward side heat transfer tube is D1, a tube diameter of the middle heat transfer tube is D2, and a tube diameter of the most leeward side is D3, D1

主权项

1. A heat exchanger, in which a plurality of plate-shaped fins are attached to outer peripheries of heat transfer tubes through which a refrigerant flows, the heat exchanger exchanging heat between the refrigerant and the air, the heat exchanger comprising:
first, second, and third rows of heat transfer tubes arranged along a direction of an air flow, the air flow being generated by a fan, the second row being disposed between the first and third rows along the direction of the air flow; and first plate-shaped fins attached to the outer periphery of the heat transfer tube in the first row, second plate-shaped fins attached to the outer periphery of the heat transfer tube in the second row, and third plate-shaped fins attached to the outer periphery of the heat transfer tube in the third row, wherein: among the first, second, and third rows of the heat transfer tubes:
a tube diameter of the heat transfer tube in the first row is D1,a tube diameter of the heat transfer tube in the second row is D2,a tube diameter of the heat transfer tube in the third row is D3,D1the heat transfer tube of the first row is operated as an inlet, andthe fan operates so that the direction of air flow makes the first row the most leeward of the first, second, and third rows; the refrigerant flowing through the heat exchanger contains a highest percentage of liquid refrigerant flows through the heat transfer tube in the first row; and a width of the first plate-shaped fins is larger than widths of the second plate-shaped fins and the third plate-shaped fins.