# US 12,004,326 B2 · Architecture to provide liquid and closed loop air cooling

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- Number: US 12,004,326 B2
- Document ID: US12004326B2
- Status: Granted
- Kind: B2
- Application number: 17/971,332
- Filed: 2022-10-21
- Published: 2024-04-25
- Granted: 2024-06-04
- Earliest claimed: 2022-10-21
- Assignees: Dell Products L.P.
- Applicants: Dell Products L.P.
- Inventors: Tyler Baxter Duncan; Anthony Middleton
- Web page: https://patentgrep.com/patent/US12004326B2

## CPC

- H05K 7/20327: {Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds}
- H05K 7/20745: {within rooms for removing heat from cabinets, e.g. by air conditioning device}
- H05K 7/2079: {within rooms for removing heat from cabinets}
- H05K 7/208: {Liquid cooling with phase change}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

Multiple systems and methods for providing combined liquid and air cooling for IT units are disclosed. The system includes a dry cooling section with at least one dry cooler and a liquid loop interface with at least one liquid heat exchange device. A primary loop includes at least one dry cooler of the dry cooler section, and a secondary loop includes the at least one liquid heat exchange device of the liquid loop interface that provides liquid cooling to one or more IT units. The system may include an air/liquid exchange section with at least one air/liquid exchange device that provides air cooling to the one or more IT units. The at least one air-liquid heat exchange device is part of the primary loop.

## Claims

### Claim 1

A system for cooling Information Technology (IT) units, the system comprising:
a dry cooling section comprising at least one dry cooler;
a liquid loop interface comprising at least one liquid heat exchange device;
a primary loop comprising a subset of the at least one dry cooler of the dry cooler section;
a secondary loop comprising the at least one liquid heat exchange device of the liquid loop interface that provides liquid cooling to one or more IT units; and
a third liquid cooling loop comprising the liquid loop interface and a second subset of the at least one dry cooler of the dry cooler section.

### Claim 2 (depends on 1)

The system of claim 1, further comprising:
an air/liquid exchange section comprising at least one air-liquid heat exchange device that provides air cooling to the one or more IT units,
wherein the at least one air-liquid heat exchange device is part of the primary loop.

### Claim 3 (depends on 1)

The system of claim 1,
wherein heat is removed from the liquid loop interface via the third liquid cooling loop.

### Claim 4 (depends on 1)

The system of claim 1, wherein heat is removed from the liquid loop interface via the primary loop.

### Claim 5 (depends on 4)

The system of claim 4, further comprising:
a primary loop control valve that controls the flow of liquid in the primary loop.

### Claim 6 (depends on 4)

The system of claim 4, further comprising:
at least one liquid heat exchange device control valve that controls the flow of liquid in the primary loop to the at least one liquid heat exchange device.

### Claim 7 (depends on 1)

The system of claim 1, further comprising:
a plurality of liquid heat exchange devices in the liquid loop interface,
wherein each of the plurality of liquid heat exchange devices establishes the secondary loop with a plurality of IT units of the one or more IT units.

### Claim 8 (depends on 7)

The system of claim 7, wherein each liquid heat exchange device provides the secondary loop to each of the plurality of IT units.

### Claim 9 (depends on 1)

The system of claim 1, wherein a Power Usage Effectiveness (PUE) is less than 1.3.