# US 2018/0320979 A1 · Refrigerant to water heat exchanger

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2018/0320979 A1
- Document ID: US20180320979A1
- Status: Published application
- Kind: A1
- Application number: 16/037,491
- Filed: 2018-07-17
- Published: 2018-11-08
- Earliest claimed: 2013-04-30
- Assignees: Carrier Corporation
- Applicants: Carrier Corporation
- Inventors: Derek Leman; Mark Shoemaker
- Web page: https://patentgrep.com/patent/US20180320979A1

## CPC

- F28D 7/022: {the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration}
- B21C 37/154: {Making multi-wall tubes}
- B21D 39/04: of tubes with tubes; of tubes with rods {(crimped pipe joints as such F16L13/14)}
- B21D 53/06: of metal tubes
- Y10T 29/4935: Heat exchanger or boiler making
- 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
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A heat exchanger having at least one inner conduit comprising of a second tubular member coaxially disposed within a first tubular member, wherein the second tubular member outer surface is in contact with the first tubular member inner surface. Each of the first and second tubular members is composed of a material with an approximately 0.015 inch maximum wall thickness.

## Claims

### Claim 1

A method for constructing a heat exchanger from a first refrigeration tube, and a second refrigeration tube, the method comprising:
(a) inserting the first refrigeration tube, including a first inner surface, a first outer surface, and having a first diameter into a second refrigeration tube, including a second inner surface including continuous enhancements formed longitudinally therein, a second outer surface, and having a second diameter; and
(b) expanding the first refrigeration tube within the second refrigeration tube to bring the first outer surface into contact with the enhancements of the second inner surface, thereby forming an inner conduit.

### Claim 2 (depends on 1)

The method of claim 1 further comprising inserting the inner conduit into an outer conduit.

### Claim 3 (depends on 1)

The method of claim 1, wherein step (b) comprises placing an object in the interior of the first refrigeration tube, and mechanically driving the object through the entire length of the first refrigeration tube.

### Claim 4 (depends on 2)

The method of claim 2, wherein the object comprises a steel ball attached to a rod.

### Claim 5

A method for constructing a heat exchanger from a first refrigeration tube, and a second refrigeration tube, the method comprising:
(a) inserting the first refrigeration tube, including a first inner surface, a first outer surface, including continuous enhancements formed longitudinally therein, and having a first
diameter into a second refrigeration tube, including a second inner surface, a second outer surface, and having a second diameter; and
(b) expanding the first refrigeration tube within the second refrigeration tube to bring the enhancements of the second outer surface into contact with the first inner surface, thereby forming an inner conduit.

### Claim 6 (depends on 5)

The method of claim 5 further comprising inserting the inner conduit into an outer conduit.

### Claim 7 (depends on 5)

The method of claim 5, wherein step (b) comprises placing an object in the interior of the first refrigeration tube, and mechanically driving the object through the entire length of the first refrigeration tube.

### Claim 8 (depends on 7)

The method of claim 7, wherein the object comprises a steel ball attached to a rod.