# US 2021/0239371 A1 · HVAC Condenser Coil Isolators

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- Number: US 2021/0239371 A1
- Document ID: US20210239371A1
- Status: Published application
- Kind: A1
- Application number: 17/230,982
- Filed: 2021-04-14
- Published: 2021-08-05
- Earliest claimed: 2018-06-21
- Assignees: Lennox Industries Inc.
- Applicants: Lennox Industries Inc.
- Inventors: Miguel Montemayor; William Toombs, JR.; Aylan A. Him; Tate Joseph Byers
- Web page: https://patentgrep.com/patent/US20210239371A1

## CPC

- F25B 39/04: Condensers
- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- F24F 1/16: Arrangement or mounting thereof
- F28F 19/002: {by using inserts or attachments}
- F28D 2021/007: {Condensers}
- F28F 2265/24: for electrical insulation
- F28F 2270/00: Thermal insulation; Thermal decoupling
- F28F 2280/00: Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- 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

In one instance, an isolator for a heating, ventilating, and cooling (HVAC) system is provided that is a formed plastic member that is disposed between dissimilar metals of the bottom of the condenser and a base pan that supports the condenser or between two dissimilar metals of another HVAC heat exchanger. The isolator separates the two dissimilar metals involved from each of those components and also provides gaps or apertures to drain any water that otherwise might become standing water that potentially causes oxidation or increased oxidation. Other aspects are disclosed.

## Claims

### Claim 1

A method for isolating a first metal of a heat exchanger of a heating ventilating and air cooling system from a second metal of a support portion of an HVAC system, wherein the first metal is different from the second metal, the method comprising:
releaseably coupling a plastic isolator to a bottom longitudinal edge of the heat exchanger;
disposing the heat exchanger on the support portion of the HVAC system with the plastic isolator against the support portion; and
wherein the plastic isolator comprises a plastic member having generally a u-shape in lateral cross section and having a receiving area at an interior base of the u-shape and having side walls formed with drainage gaps, wherein a center portion of the u-shape is substantially flat.

### Claim 2 (depends on 1)

The method of claim 1, wherein the step of releaseably coupling a plastic isolator to a bottom longitudinal edge of the heat exchanger comprises moving the side walls of the plastic isolator away from each other to receive the bottom longitudinal edge of the heat exchanger into an interior of the plastic isolator.

### Claim 3 (depends on 1)

The method of claim 1, wherein the step of releaseably coupling a plastic isolator to a bottom longitudinal edge of the heat exchanger comprises moving the side walls of the plastic isolator away from each other to receive the bottom longitudinal edge of the heat exchanger into an interior of the plastic isolator with the bottom longitudinal edge touching the receiving area.

### Claim 4 (depends on 1)

The method of claim 1, wherein the plastic isolator comprises polypropylene.

### Claim 5 (depends on 1)

The method of claim 1, wherein a plurality of drainage apertures is formed through the receiving area and wherein the plurality of drainage apertures extend along a longitudinal length of the plastic isolator.