# US 12,004,336 B2 · System and method for thermal management and electromagnetic interference management

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- Number: US 12,004,336 B2
- Document ID: US12004336B2
- Status: Granted
- Kind: B2
- Application number: 16/516,509
- Filed: 2019-07-19
- Published: 2021-01-21
- Granted: 2024-06-04
- Earliest claimed: 2019-07-19
- Assignees: Dell Products L.P.
- Applicants: Dell Products L.P.
- Inventors: Steven Embleton; Ben John Sy; Eric Michael Tunks; Rene J. Salas
- Web page: https://patentgrep.com/patent/US12004336B2

## CPC

- H05K 9/0041: {Ventilation panels having provisions for screening}
- H01Q 17/00: Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H05K 7/20136: {Forced ventilation, e.g. by fans (H05K7/202 takes precedence)}
- H05K 7/20145: {Means for directing air flow, e.g. ducts, deflectors, plenum or guides}
- H05K 7/20209: {Thermal management, e.g. fan control}
- H05K 7/20727: {within server blades for removing heat from heat source}
- H05K 7/1487: {Blade assemblies, e.g. blade cases or inner arrangements within a blade}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A data processing device includes an internal volume for housing electromagnetic interference emitting devices. The data processing device further includes a first electromagnetic radiation absorbing vent. The data processing device further includes a second electromagnetic radiation absorbing vent. The first electromagnetic radiation absorbing vent and the second electromagnetic radiation absorbing vent delineate a gas flow path through the internal volume.

## Claims

### Claim 1

A data processing device, comprising:
an internal volume for housing electromagnetic interference (EMI) emitting devices, wherein the EMI emitting devices comprise hardware devices that emit EMI; and
two electromagnetic radiation (EMR) absorbing vents that delineate a gas flow path through the internal volume,
wherein a first EMR absorbing vent of the EMR absorbing vents comprises a first plurality of gas flow paths,
wherein the first plurality of gas flow paths comprises hollow portions of a body that comprises an EMR lossy material,
wherein the first plurality of gas flow paths is delineated by a gas flow pattern on a surface of the body,
wherein a second EMR absorbing vent of the EMR absorbing vents comprises a second plurality of gas flow paths,
wherein the second plurality of gas flow paths is delineated by a non-linear gas flow pattern on a surface of a second body that comprises a second EMR lossy material, and
wherein the lossy material has a real permittivity of a range between 1 and 50 for EMI in a frequency range at least 0.7 and less than 2 gigahertz.

### Claim 2 (depends on 1)

The data processing device of claim 1, wherein the internal volume is adapted to suppress EMI transmission from within the internal volume to an ambient environment.

### Claim 3 (depends on 1)

The data processing device of claim 1, wherein at least one of the two EMR absorbing vents comprises a reversibly deformable material.

### Claim 4 (depends on 1)

The data processing device of claim 1, wherein the EMR lossy material has an electrical loss tangent of greater than 0.1.

### Claim 5 (depends on 1)

The data processing device of claim 1, wherein the EMR lossy material has a magnetic loss tangent of greater than 0.5.

### Claim 6 (depends on 1)

The data processing device of claim 1, wherein the non-linear gas flow pattern is asymmetric.

### Claim 7 (depends on 1)

The data processing device of claim 1, wherein the non-linear gas flow pattern corresponds to a shadow of a gas flow control device hosted by the data processing device, wherein the gas flow control device is a fan disposed outside of the internal volume.