# US 10,371,451 B2 · Multichannel heat exchanger tubes with flow path inlet sections

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- Number: US 10,371,451 B2
- Document ID: US10371451B2
- Status: Granted
- Kind: B2
- Application number: 14/850,774
- Filed: 2015-09-10
- Published: 2016-01-07
- Granted: 2019-08-06
- Earliest claimed: 2010-06-29
- Assignees: Johnson Control Technology Company
- Applicants: Johnson Controls Technology Company
- Inventors: Jerome Anthony Matter, III; Jeffrey Lee Tucker
- Web page: https://patentgrep.com/patent/US10371451B2

## CPC

- F28D 1/0535: {the conduits having a non-circular cross-section}
- B21C 37/151: {Making tubes with multiple passages}
- B21C 37/157: {Perforations}
- B23P 6/00: Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D1/00, B21D3/00; repairing defective or damaged objects by casting techniques B22D19/10)
- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- F28D 1/05383: {with multiple rows of conduits or with multi-channel conduits (F28D1/05391 takes precedence)}
- F28F 1/022: {with multiple channels}
- 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 9/0273: {with multiple holes}
- F28F 9/0278: {in the form of stacked distribution plates or perforated plates arranged over end plates}
- Y10T 29/49391: Tube making or reforming
- 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)
- B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present disclosure is directed to a method of making a heat exchanger tube, such as multichannel tubes. The heat exchanger tube may include a plurality of generally parallel flow paths extending between opposite ends. The method may include removing a section of an outer wall along the length of the tube to expose at least some of the plurality of generally parallel flow paths.

## Claims

### Claim 1

A method of making a heat exchanger, comprising:
in a heat exchanger tube comprising a plurality of generally parallel flow paths extending between opposite ends, removing a section of an outer wall along a length of the heat exchanger tube to expose at least some of the plurality of generally parallel flow paths, wherein removing the section of the outer wall comprises removing the section from the outer wall proximate one of the opposite ends of the heat exchanger tube, such that the one of the opposite ends is configured to be inserted into a manifold, and such that an exposed section of the at least some of the plurality of generally parallel flow paths is entirely within the manifold, wherein the exposed section exposes the at least some of the plurality of parallel flow paths along the length of the heat exchanger tube; and
separating a tube length of the heat exchanger tube to form multiple multichannel tubes.

### Claim 2 (depends on 1)

The method of claim 1, wherein the heat exchanger tube comprises an oblong shaped tube comprising a top wall, a bottom wall disposed opposite of the top wall, and a pair of side walls extending between the top wall and the bottom wall.

### Claim 3 (depends on 2)

The method of claim 2, wherein removing the section of the outer wall comprises:
removing a portion of the top wall extending along a width of the heat exchanger tube;
removing a portion of the bottom wall extending along the width of the heat exchanger tube; or
a combination thereof.

### Claim 4 (depends on 2)

The method of claim 2, wherein removing the section of the outer wall comprises cutting the heat exchanger tube crosswise at an angle to produce a slanted end where the bottom wall extends past the top wall.

### Claim 5 (depends on 1)

The method of claim 1, wherein removing the section of the outer wall comprises removing a section of the outer wall disposed at one of the opposite ends.

### Claim 6 (depends on 1)

The method of claim 1, wherein the heat exchanger tube has a rectangular cross-section.

### Claim 7 (depends on 1)

The method of claim 1, wherein lengths of the plurality of multichannel tubes vary.

### Claim 8 (depends on 1)

The method of claim 1, wherein a width of each of the plurality of generally parallel flow paths vary.