# US 11,112,183 B2 · Heat exchanger channels

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- Number: US 11,112,183 B2
- Document ID: US11112183B2
- Status: Granted
- Kind: B2
- Application number: 14/995,957
- Filed: 2016-01-14
- Published: 2017-07-20
- Granted: 2021-09-07
- Earliest claimed: 2016-01-14
- Assignees: Hamilton Sundstrand Corporation
- Applicants: Hamilton Sundstrand Corporation
- Inventors: Joseph Turney; Ram Ranjan; Thomas M. Yun; Matthew R. Pearson
- Web page: https://patentgrep.com/patent/US11112183B2

## CPC

- F28D 7/022: {the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration}
- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- F28D 7/0033: {the conduits for one medium or the conduits for both media being bent}
- F28F 1/025: {with variable shape, e.g. with modified tube ends, with different geometrical features (F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence)}
- F28F 1/04: polygonal, e.g. rectangular {(F28F1/022 takes precedence)}
- F28F 7/02: Blocks traversed by passages for heat-exchange media {(F28D7/0008 takes precedence)}
- F28D 7/082: {with serpentine or zig-zag configuration}
- F28F 1/08: Tubular elements crimped or corrugated in longitudinal section
- F28F 13/08: by varying the cross-section of the flow channels
- F28F 2210/08: Assemblies of conduits having different features
- 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)
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A heat exchanger includes a heat exchanger body having a first end and a second end opposed to the first end along a flow axis. A plurality of flow channels is defined in the heat exchanger body extending axially with respect to the flow axis. A first set of the flow channels forms a first flow circuit and a second set of the flow channels forms a second flow circuit that is in fluid isolation from the first flow circuit. Each flow channel is fluidly isolated from the other flow channels. The flow channels all conform to a curvilinear profile.

## Claims

### Claim 1

A heat exchanger comprising:
a heat exchanger body having a first end and a second end opposed to the first end along a flow axis;
a plurality of flow channels defined in the heat exchanger body extending axially with respect to the flow axis, wherein a first set of the flow channels forms a first flow circuit, wherein a second set of the flow channels forms a second flow circuit that is in fluid isolation from the first flow circuit,
wherein each flow channel is fluidly isolated from the other flow channels, wherein each flow channel of the first flow circuit includes a respective inlet on the first end of the heat exchanger body and a respective outlet on the second end of the heat exchanger body, and wherein each flow channel of the second flow circuit includes a respective inlet on one of the first and second ends of the heat exchanger body and a respective outlet on the other of the first and second ends of the heat exchanger body, and
wherein the flow channels all conform to a curvilinear profile, wherein the curvilinear profile includes a sinusoidal wave pattern extending axially relative to the flow axis, wherein the curvilinear profile is a common curvilinear profile for the flow channels and includes the sinusoidal wave pattern with waves of a first amplitude and wavelength configuration extending in a first direction normal to the flow axis, and waves of a second amplitude and wavelength configuration extending in a second direction normal to the flow axis, wherein the first direction and second direction are different from one another, and wherein the first wavelength and the second wavelength are different from one another.

### Claim 2 (depends on 1)

The heat exchanger as recited in claim 1, wherein each flow channel of the first flow circuit includes a respective inlet on the first end of the heat exchanger body and a respective outlet on the second end of the heat exchanger body, and wherein each flow channel of the second flow circuit includes a respective inlet on the second end of the heat exchanger body and a respective outlet on the first end of the heat exchanger body.

### Claim 3 (depends on 1)

The heat exchanger as recited in claim 1, wherein each flow channel includes a single respective inlet and a single respective outlet.

### Claim 4 (depends on 1)

The heat exchanger as recited in claim 1, wherein the flow channels of the first flow circuit have cross-sections of a first shape, and wherein the flow channels of the second flow circuit have cross-sections of a second shape different from the first shape.

### Claim 5 (depends on 1)

The heat exchangers as recited in claim 1, wherein each flow channel of the first flow circuit has a diamond or hexagonal cross-sectional shape, and wherein each flow channel of the second flow circuit has a circular cross-sectional shape.

### Claim 6 (depends on 1)

The heat exchanger as recited in claim 1, wherein each adjacent pair of the flow channels is separated from one another by a heat exchanger wall, wherein the heat exchanger wall is constant in cross-section from the first end of the heat exchanger body to the second end of the heat exchanger body.

### Claim 7 (depends on 1)

The heat exchanger as recited in claim 1, wherein the flow channels of the first flow circuit and the flow channels of the second flow circuit are arranged to define a two-dimensional cross-sectional checkerboard pattern with one another.

### Claim 8 (depends on 1)

The heat exchanger as recited in claim 1, wherein the flow channels and heat exchanger body are additively manufactured as a unitary structure.

### Claim 9 (depends on 1)

The heat exchanger as recited in claim 1, wherein the first and second directions are normal to one another.