| 摘要 |
The invention relates to a heat exchanger comprising a means and a plate stack, which plate stack is composed of a number of mutually similar heat transfer plates (1), every second heat transfer plate (1) in the stack being rotated 180° in a plane parallel with a heat transfer surface (9) in said heat transfer plate (1). A number of contact points (16a-d) are situated round a first port region (12) in such a way that at least one contact point (16b, c) adjoins two contact points (16a, c and 16b, d respectively), said contact points (16a-d) being in principle at the same radial distance from the centre of said port region (12). The invention further relates also to said means comprising a number of protrusions whereby the means fits into a pattern in said heat transfer plate (1). The invention also relates to a plate heat exchanger (3) comprising a plate stack (2) and at least one means (25) of the invention.
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