公开(公告)号：US20170284714A1

公开(公告)日：2017-10-05

申请号：US15512657

申请日：2015-01-09

申请人： Mitsubishi Electric Corporation

发明人： Akira ISHIBASHI ,  Shinya HIGASHIUE ,  Daisuke ITO ,  Shigeyoshi MATSUI ,  Shin NAKAMURA ,  Yuki UGAJIN ,  Takumi NISHIYAMA ,  Atsushi MOCHIZUKI

IPC分类号： F25B30/06 ,  F24J3/08 ,  F25D23/12

CPC分类号： F25B30/06 ,  F24T10/30 ,  F25B13/00 ,  F25B23/00 ,  F25B39/00 ,  F25B2313/002 ,  F25B2400/121 ,  F25B2500/01 ,  F25B2500/09 ,  F25D23/12 ,  F28D2021/0068 ,  F28F1/022 ,  F28F2255/16 ,  Y02E10/10

摘要： A heat exchanger includes at least one flat tube configured to allow a refrigerant mixture inclusive of HFO1123, R32, and HFO1234yf to flow therethrough as a heat medium. The flat tube includes a plurality of flow paths for the heat medium. Each of the plurality of flow paths has a round rectangular shape in cross section, the round rectangular shape being defined by a pair of longitudinal line segments opposed to each other, a pair of lateral line segments opposed to each other, and a set of four rounded corners, each of the rounded corners being a segment of a circumference of a circle. The pair of longitudinal line segments are intersects with the pair of lateral line segments at the rounded corners. The round rectangular shape is configured to satisfy 0.005≦r/d≦0.8 where r is a radius of the circle, and d is a distance between the pair of longitudinal line segments opposed to each other.