Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Reexamination Certificate
2005-08-09
2005-08-09
Leo, Leonard R. (Department: 3753)
Heat exchange
Flow passages for two confined fluids
Interdigitated plural first and plural second fluid passages
C165S166000
Reexamination Certificate
active
06926076
ABSTRACT:
The present invention is a plate heat exchanger for heat transfer between two fluids, having several thin heat transfer plates (1) abutting towards each other and between the heat transfer plates (1) arranged sealing members (6), which in alternate plate interspaces delimit a flow space for a first fluid and in the remaining plate interspaces delimit flow spaces for a second fluid, each heat transfer plate (1) having a pressed corrugation pattern, which has two distribution portions (7, 8) and, arranged between these, a main heat transfer portion (9), which is divided in several areas (10a, 10b) with parallel ridges and valleys, and the plate heat exchanger having inlets and outlets for the fluids, arranged such that the fluids will have a flow direction between the heat transfer plates (1) essentially from one to the other of the distribution portions (7,8) at each heat transfer plate. According to the invention the heat transfer portion (9) of each heat transfer plate (1) has a row with at least three areas (10a, 10b) located after each other in the flow direction and an even number of such rows are arranged next to each other across the flow direction, by which the parallel ridges and valleys of each pair of adjacent areas (10a, 10b) extend in such a way that they form mirror images of each other with reference to an imaginary line between respective areas (10a, 10b).
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Alfa Laval Corporation AB
Fish & Richardson P.C.
Leo Leonard R.
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