Alfa Laval Corporate Ab

Helén Gustafsson

Klas Bertilsson

Anders Nyander

Tomas Kovacs

The invention refers to a plate heat exchanger comprising a first end plate (), a second end plate () and a number of heat exchanger plates (), forming first plate interspaces (I) and second plate interspaces (II), in alternating order. The heat exchanger plates comprise a first outermost plate pair (), a second outermost plate pair () and intermediate plate pairs (). The first end plate and the heat exchanger plates comprise first porthole areas () for first porthole channels () for the formation of inlet and outlet for a first medium to and from the first plate interspaces, and second porthole areas () for the formation of second porthole channels () for inlet and outlet for a second medium to and from the second plate interspaces. The first porthole areas of the heat exchanger plates of the second outermost plate pair form portholes and the second porthole areas of these heat exchanger plates are closed.

Plate heat exchanger with strengthening sheet

The invention relates to a heat exchanger plate, and a plate heat exchanger including a plurality of heat exchanger plates. Each heat exchanger plate include a heat transfer area, an edge area, that extends around and outside the heat transfer area, and a number of portholes that extend through the heat exchanger plate and are located inside and in the proximity of the edge area. The porthole is defined by a porthole edge and has a center. The porthole edge has a first edge portion, that faces the edge area, and a second edge portion that faces the heat transfer area. The first edge portion has a corrugation seen from the center of the porthole. The second edge portion has a substantially plane shape seen from the center of the porthole.

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Staffanstorp, Sweden

Helén Gustafsson