# US 4,724,902 A · Plate heat exchanger

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- Number: US 4,724,902 A
- Document ID: US4724902A
- Status: Granted
- Kind: A
- Application number: 06/890,642
- Filed: 1986-07-30
- Granted: 1988-02-16
- Earliest claimed: 1985-08-06
- Assignees: Rohm GmbH Chemische Fabrik
- Inventors: Heinz Gross
- Web page: https://patentgrep.com/patent/US4724902A

## CPC

- F28F 21/065: {the heat-exchange apparatus employing plate-like or laminated conduits}
- F28D 9/0037: {the conduits for the other heat-exchange medium also being formed by paired plates touching each other (F28D9/0043 takes precedence)}
- Y10S 165/394: Corrugated heat exchange plate
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A plate heat exchanger, in particular of synthetic material is disclosed consisting of a stack of plates which are corrugated in two directions transverse to each other. The plates are so arranged in the stack that the corrugations of consecutive plates run in equiphase in one direction and in antiphase in the other direction. In the direction of the corrugation in equiphase, perfusable channels pass.

## Claims

### Claim 1

A plate heat exchanger body having a plurality of faces, comprising:
a plurality of corrugated plates, stacked to form perfusion channels therebetween, wherein
said plates are each at least in part corrugated in two transverse directions, wherein said corrugations are wave-shaped in each direction, and wherein
any two adjacent plates of said stack are arranged such that said corrugations run in equiphase in one said transverse direction and in antiphase in the other said transverse direction.

### Claim 2 (depends on 1)

The plate heat exchanger body of claim 1, wherein said plates have equal rectangular area and wherein outer edges of all of said plates are coplanar.

### Claim 3 (depends on 1, 2)

The plate heat exchanger body of claim 1 or 2, for use as a cross-current recuperator wherein said corrugations are regular for all of said plates and wherein the corrugations of any two adjacent plates alternate between antiphase and equiphase in the direction of stacking.

### Claim 4 (depends on 1, 2)

The plate heat exchanger body of claim 1 or 2, for use as a direct-current or counter-current recuperator wherein the corrugations of all adjacent plates are in antiphase in one face and in equiphase in an adjacent face.

### Claim 5 (depends on 4)

The plate heat exchanger body of claim 4, including two facing external regions in which a peripheral edge of one said plate does not contact a peripheral edge of an adjacent said plate.

### Claim 6 (depends on 5)

The plate heat exchanger body of claim 5, wherein peripheral edges of said plates are not corrugated in said external regions.

### Claim 7 (depends on 5)

The plate heat exchanger body of claim 5, wherein said plates are transversely corrugated in said external regions and said corrugations run in equiphase in both said directions.

### Claim 8 (depends on 2)

The plate heat exchanger body of claim 2, wherein all edges of each of plates of said stack are non-corrugated running parallel to the center plane of each said plate.

### Claim 9 (depends on 8)

The plate heat exchanger body of claim 8, wherein the distance between two adjacent edges varies from the center plane of said plate to the amplitude height of said corrugation and wherein the direction of said variation is inverted at each corner of said stack and two of said adjacent non-corrugated edges are closely superimposed on each other.

### Claim 10 (depends on 9)

The plate heat exchanger body of claim 9, wherein said superimposed edges are tightly connected by welding or by an adhesive means.

### Claim 11 (depends on 1)

The plate heat exchanger body of claim 1, further comprising a detachable mechanical means for holding said plates together.