| 摘要 |
A heat transfer plate (32) and a plate heat exchanger (26) comprising such a heat transfer plate is provided. The heat transfer plate (32) has a first long side (46) and second long side (48) and comprises a distribution area (64), a transition area (66) and a heat transfer area (54). The transition area (66) adjoins the distribution area (64) along a first borderline (68) and the heat transfer area (54) along a second borderline (70), and it is provided with a transition pattern comprising transition projections (98) and transition depressions (100). Further, the transition area (66) comprises a first sub area (66a), a second sub area (66b) and a third sub area (66c) arranged in succession between the first and second border lines. An imaginary straight line (102) extends between two end points (104, 106) of each transition projection (98) with a smallest angle an, n = 1, 2, 3... in relation to a longitudinal center axis (y) of the heat transfer plate. The smallest angle an for at least a main part of the transition projections (98) within the first sub area (66a) is essentially equal to a first angle a1. The smallest angle an is varying between the transition projections (98) within the second sub area (66b) such that the smallest angle an for at least a main part of the transition projections (98) within the second sub area (66b) is larger than said first angle a1 and increasing in a direction from the first long side (46) to the second long side (48). The heat transfer plate is characterized in that at least a main part of the second borderline (70) is straight and essentially perpendicular to the longitudinal center axis (y) of the heat transfer plate (32). Further, the smallest angle an for a first set of the transition projections (98) within the third sub area (66c) is essentially equal to said first angle a1. |
