| 摘要 |
A plate heat exchanger where a number of heat exchange plates of two different types are clamped between two massive pressure plates. The heat exchanger plates are provided with a first flow zone surrounded by an edge seal having first passage openings for a first fluid medium. The heat exchanger plates are further provided with a second flow zone having second passage openings surrounded by an annular seal for a second fluid medium outside of the first flow zone. The annular seal is embedded in a first reinforcing seam having a bottom wall and upwardly and outwardly tapering side walls. The heat exchanger plates further include a bottom plate adjoining the annular seal and which is provided with a second reinforcing seam disposed parallel and below the first reinforcing seam and which broadens in an upward direction. The second reinforcing seam is provided with a plurality of supporting bulges extending into and narrowing the second reinforcing seam. The supporting bulges are in contact with the bottom wall of the first reinforcing seam. The first flow zone is in part defined by the bottom plate and the bottom wall of the first reinforcing seam. The first fluid medium flows under the annular seal and simultaneously between the supporting bulges. A second seal spaced from the annular seal having the same characteristics as the annular seal is preferably provided.
|
