Patent ID: 8534349

Claim:
A heat exchanger tube provided with a flat tube main body with a certain length and having a plurality of refrigerant flow passages each extending in a tube longitudinal direction and disposed in parallel in a tube widthwise direction, wherein the following relations are established: Ac/At× 100=30 to 45; and P/L× 100=200 to 325, wherein a total cross-sectional area of the tube main body (including the refrigerant passage portions) is “At”; a total cross-sectional area of the refrigerant flow passages is “Ac”; an external peripheral length of the tube main body is “L”; and a total internal peripheral length of the refrigerant passages is “P”, wherein the relation of H=0.5 to 1.5 mm is established, wherein a height of the tube main body is “H”, and wherein the relation of W=10 to 20 mm is established, wherein a width of the tube main body is “W”.