# US 2013/0153184 A1 · Heat exchanger

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- Number: US 2013/0153184 A1
- Document ID: US20130153184A1
- Status: Published application
- Kind: A1
- Application number: 13/677,773
- Filed: 2012-11-15
- Published: 2013-06-20
- Earliest claimed: 2011-12-19
- Assignees: ROLLS-ROYCE plc
- Inventors: Andrew Martin ROLT; Rory Douglas STIEGER
- Web page: https://patentgrep.com/patent/US20130153184A1

## CPC

- F28F 3/005: {Arrangements for preventing direct contact between different heat-exchange media (F28F3/10 takes precedence)}
- F28D 9/0037: {the conduits for the other heat-exchange medium also being formed by paired plates touching each other (F28D9/0043 takes precedence)}
- F28F 3/046: {the deformations being linear, e.g. corrugations}
- F28F 2250/106: with cross flow
- 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)

## Abstract

This invention relates to a heat exchanger, comprising a plurality of stacked corrugated plates, each plate having a plurality of parallel main corrugations each having longitudinal peak ridges and trough ridges, wherein either or both of the peak ridges and trough ridges have an undulating profile so as to define a plurality of summits in a common plane.

## Claims

### Claim 1

A heat exchanger, comprising:
a plurality of stacked corrugated plates, each plate having a plurality of parallel main corrugations each having longitudinal peak ridges and trough ridges, wherein either or both of the peak ridges and trough ridges have an undulating profile so as to define a plurality of summits in a common plane.

### Claim 2 (depends on 1)

A heat exchanger as claimed in claim 1 wherein either or both of the main corrugations and undulations are periodic.

### Claim 3 (depends on 2)

A heat exchanger as claimed in claim 2 wherein either or both of the main corrugations and undulations are substantially sinusoidal, Bezier curves or line and arcuate segments in profile.

### Claim 4 (depends on 1)

A heat exchanger as claimed in claim 1 wherein the pitch of the undulations is equal to the pitch of the main corrugations in an adjacent plate.

### Claim 5 (depends on 1)

A heat exchanger as claimed in claim 1 wherein the longitudinal axes of the main corrugations of adjacent plates are angled relative to each other.

### Claim 6 (depends on 5)

A heat exchanger as claimed in claim 5 wherein the angle is 90 degrees.

### Claim 7 (depends on 5)

A heat exchanger as claimed in claim 5 wherein the angle is between 0 and 180 degrees.

### Claim 8 (depends on 1)

A heat exchanger as claimed in claim 1 wherein the depth between adjacent ridges is greater than the depth of the undulations.

### Claim 9 (depends on 1)

A heat exchanger as claimed in claim 1 wherein one or more of the summits provides a seat portion for abutting a corresponding summit of an adjacent plate.

### Claim 10 (depends on 1)

A heat exchanger as claimed in claim 1 wherein the undulations of adjacent peak ridges and trough ridges in a plate are in phase relative to the longitudinal axis of the main corrugations.

### Claim 11 (depends on 1)

A heat exchanger as claimed in claim 1 wherein substantially the entirety of each plate has undulating ridges.

### Claim 12 (depends on 1)

A heat exchanger as claimed in claim 1 in which at least one of the corrugated plates includes straight ridges.

### Claim 13 (depends on 1)

A heat exchanger as claimed in claim 1 in which the main corrugations are asymmetric.

### Claim 14 (depends on 13)

A heat exchanger as claimed in claim 13 in which the main corrugations have a saw toothed profile.

### Claim 15 (depends on 1)

A heat exchanger as claimed in claim 1 wherein the main corrugations are tortuous along the longitudinal axis of the main corrugation.