| 摘要 |
In a series of heat exchange plates (5, 6), each being rectangular with ports (7, 8, 9, 10) in its corner portions, alternate plates (6) are fully sealed and coact with intermediate plates (5) to define two groups of elongated passages through which the respective heat exchanger fluids (A, B) flow. Each intermediate plate (5) is only partially sealed and defines with one (6) of the two adjacent fully-sealed plates an open space (20) communicating directly with atmosphere, the partial sealing consisting of port sealing means (7a, 8a, 9a, 10a) interconnecting respective pairs of opposing ports to form channels through which the two fluids (A, B) flow without entering said open space (20). The open spaces (20) form paths through which any leakage of either fluid (A, B) can escape to atmosphere, thus preventing contamination of either fluid by the other. |
