Importance

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Abstract

A plate heat exchanger comprises a stack of rectangular heat transfer plates, wherein each rectangular heat transfer plate comprises a circumference with four circumference edges arranged at the circumference of the rectangular heat transfer plate, a rectangular heat transfer wall extending between the circumference edges of the heat transfer plate, the rectangular heat transfer wall defining a plane and comprising a circumference portion extending to the circumference edge in the plane of the heat transfer wall, and the heat transfer plate further comprises at least two folded parts arranged at the circumference of the heat transfer plate and extending from the heat transfer wall over the circumference edge of the heat transfer plate, the folded parts contacting the heat transfer wall for forming spacer elements. Two opposite folded parts are folded towards a same side of the plane of the rectangular heat transfer wall, or at least two adjacent folded parts of the rectangular heat transfer wall are each folded towards opposite sides of the plane of the rectangular heat transfer wall with respect to the adjacent folded part. Pairs of heat transfer plates are arranged so that each folded part of one heat transfer plate is in contact over the entire length of the corresponding circumference edge either with a folded part of an adjacent heat transfer plate or with a circumference portion of the heat transfer wall of an adjacent heat transfer plate.

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First Claim