| 摘要 |
The present invention relates to a plate heat exchanger with a gasket positioned between the heat exchanger plates. The entry and outlet region from the entry and exit openings of the heat exchanger plates form a problem area, since, in this region, a gasket exists only in every second channel. Hereby, leaks may occur in this region. From the prior art solutions for avoiding or reducing the leaks in the outlet region of the entry and exit openings of the heat exchanger plates are known. In all these solutions the gaskets are still accomodated in a gasket groove. The object of the present invention is to avoid the leakiness in this region while obviating a gasket groove associated with disadvantages. According to the invention, this object is achieved, in that the corrugation extending from the entry and exit openings (8, 9) of the heat exchanger plates (1, 2) extends in a substantially radial direction to the heat exchanger surfaces (7) and thereby uninterrupted traverses the region of the extent (10) of the gasket and crosses the corresponding corrugations of the adjacent heat exchanger plates (1, 2), such that the extent (10) of the gasket is flanked on both sides by the crossing points (12) of the corrugation hills (11) of one plate (1) with the corrugation troughs of the other plate (2), the gasket (15) arranged between the heat exchanger plates (1, 2) varying in cross section to be adapted to the profile of the heat exchanger plates (1, 2) in this region, such that substantially the same specific gasket pressure is obtained over the whole extent (10) of the gasket in a compressed condition. The present invention also provides a method of producing a plate heat exchanger wherein the gasket is vulcanized in a vulcanization press using a heat exchanger plate as a press mould in the vulcanization press.
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