# US 10,455,741 B2 · Rack enclosure with perforations for cooling

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- Number: US 10,455,741 B2
- Document ID: US10455741B2
- Status: Granted
- Kind: B2
- Application number: 15/564,826
- Filed: 2015-04-17
- Published: 2018-04-19
- Granted: 2019-10-22
- Earliest claimed: 2015-04-17
- Assignees: Hewlett Packard Enterprise Development LP
- Applicants: Hewlett Packard Enterprise Development LP
- Inventors: Dave Mayer; Arlen L. Roesner
- Web page: https://patentgrep.com/patent/US10455741B2

## CPC

- H05K 7/20572: {within cabinets for removing heat from sub-racks, e.g. plenum}
- H05K 7/20145: {Means for directing air flow, e.g. ducts, deflectors, plenum or guides}
- H05K 7/20736: {within cabinets for removing heat from server blades}
- H05K 7/1488: {Cabinets therefor, e.g. chassis or racks or mechanical interfaces between blades and support structures}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

The present examples include a rack enclosure with perforations formed within vertical rack columns. Front vertical rack columns may include front perforations formed therein. The front perforations may draw air into the rack enclosure and further into a chassis. Side plenums along the side surface of the chassis may consume less space with the use of the front perforations. The space not consumed by the side plenums may be available to accommodate a chassis of a substantial volume. The chassis may expand a substantial width of the rack enclosure to house an enlarged or a maximum number of computing components within the rack enclosure.

## Claims

### Claim 1

A rack enclosure, comprising:
a rack comprising vertical rack columns, including
a front vertical rack column, and
rack panels;
perforations formed in the front vertical rack column,
a chassis mounted in the rack, the chassis housing heat-producing components, the chassis having a side surface with openings therein;
a vertical barrier extending between the side surface of the chassis and one of the rack panels;
a side plenum bounded by the side surface of the chassis, one of the rack panels, the vertical barrier, and the front vertical rack column such that, when air flows: from outside the rack enclosure into the front vertical rack column via the perforations; from the front vertical rack column into the side plenum; and from the side plenum into the chassis via the openings in the chassis.

### Claim 2 (depends on 1)

The rack enclosure of claim 1, wherein the side plenums comprise a space between the side surface of the chassis and one of the rack panels, wherein the width of the space is 0.1 inches to 0.2 inches.

### Claim 3 (depends on 1)

The rack enclosure of claim 1, wherein the vertical barrier prevents a mixing of the air in the side plenums with heated air exhausted from the chassis.

### Claim 4 (depends on 1)

The rack enclosure of claim 1, wherein the vertical barrier blocks heated air exhausted from the chassis from flowing into the plurality of openings.

### Claim 5

A method of cooling heat-producing components, comprising:
causing air to flow from outside a rack enclosure into a front vertical rack column of a rack of the rack enclosure via perforations formed in the front vertical rack column,
causing the air to flow from the front vertical rack column into a side plenum of the rack enclosure the side plenum being bounded by a side surface of a chassis mounted in the rack, a side panel of the rack,
a vertical barrier extending between the side surface of the chassis and the side panel of the rack, and the front vertical rack column:
causing the air to flow from the side plenum into the chassis via openings in the side surface of the chassis: and
causing the air to be exhausted from a rear of the chassis after being heated in the chassis.

### Claim 6 (depends on 5)

The method of claim 5, wherein the perforations are on a front-face and a side-face of the front vertical rack column.

### Claim 7 (depends on 5)

The method of claim 5, wherein a width of the plenum space between the side rack panel and the chassis is 0.1 inches to 0.2 inches.

### Claim 8

A method comprising:
providing a rack comprising rack panels including a side rack panel and vertical rack columns including a front vertical rack column comprising perforations;
mounting a chassis inside the rack such that there is a plenum space between the side rack panel and a side surface of the chassis, wherein the side surface of the chassis comprises openings to allow for air flow into the chassis; and
sealing a vertical barrier between the side rack panel and the side surface of the chassis such that air is directed to flow:
from outside the rack into the front vertical rack column via the perforations;
from the front vertical rack column into the plenum space; and
from the plenum space into the chassis via the openings in the side chassis;
wherein the vertical barrier inhibits communication of air between the plenum space and a rear side of the rack enclosure.