Patent ID: 7140424

Claim:
A refrigerant condenser comprising: a plurality of tubes including refrigerant passages therein, said tubes being laminated; a fin disposed in an air flow passage defined between each of the adjacent tubes; and header tanks disposed at both longitudinal ends of said tubes and communicating with said refrigerant passage, wherein said refrigerant passage defines a height thereof in a tube lamination direction as a tube inside passage height (Tr), and the tube inside passage height (Tr) is set within a range of 0.5–0.8 mm; wherein a dimension between an outer surface of said tube and a top of said refrigerant passage in the tube lamination direction is defined as tube outer periphery thickness Td, the tube outer periphery thickness Td is set no greater than 0.3 mm; a height of said tube in the tube lamination direction is defined as tube height Th; an interval between each of the adjacent tubes is defined as tube pitch Tp; a ratio of the tube height Th to the tube pitch Tp (Th/Tp) is defined as air flow opening ratio (Pr); and the air flow opening ratio (Pr) is set in accordance with following formula expression: 0.1429× Td 2 +0.1343× Td+ 0.139> Pr> 0.1429× Td 2 +0.1343× Td+ 0.113.