# US 2021/0240239 A1 · Cooling system with hyperbaric fan and evacuative fan > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0240239 A1 - Document ID: US20210240239A1 - Status: Published application - Kind: A1 - Application number: 16/777,431 - Filed: 2020-01-30 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Dell Products L.P. - Applicants: Dell Products L.P. - Inventors: Qinghong He; Travis Christian North; Allen B. McKittrick - Web page: https://patentgrep.com/patent/US20210240239A1 ## CPC - G06F 1/206: {comprising thermal management} - G06F 1/1656: {Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203)} - G06F 1/1658: {related to the mounting of internal components, e.g. disc drive or any other functional module} - G06F 1/203: {for portable computers, e.g. for laptops} - H05K 7/20145: {Means for directing air flow, e.g. ducts, deflectors, plenum or guides} - H05K 7/20172: {Fan mounting or fan specifications} - H05K 7/20209: {Thermal management, e.g. fan control} - H05K 9/0007: {Casings (standardised racks H05K9/0062)} - G06F 2200/201: Cooling arrangements using cooling fluid - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A system and method for cooling components and a chassis in a portable information handling system includes a pressure barrier that divides the chassis into a plurality of zones, an evacuative fan in a first zone to generate airflow across components to cool the components and a hyperbaric fan in a second zone to increase air pressure in the second zone. The pressure barrier may provide thermal isolation, acoustic dampening and electromagnetic insulation. A controller communicatively coupled to the fans can operate each fan independently to cool components for improved performance and maintain a surface temperature of the chassis below a temperature for user comfort. ## Claims ### Claim 1 A cooling system for a chassis comprising a bottom cover, a back panel, two side panels and a front panel and an information handling system in the chassis, the cooling system comprising: a pressure barrier configured to divide the chassis into a plurality of zones; an evacuative fan configured to generate an airflow relative to one or more components of the information handling system in a first zone to an opening in the first zone and to decrease air pressure in the first zone; a hyperbaric fan configured to increase air pressure in a second zone to cause air movement to one or more openings in the second zone; and a controller configured to operate the evacuative fan to maintain an operating temperature of the one or more components below a first temperature and operate the hyperbaric fan to maintain a temperature of the chassis below a second temperature. ### Claim 2 (depends on 1) The cooling system of claim 1, wherein: the pressure barrier is formed as a continuous barrier to isolate the one or more components; the evacuative fan is located proximate to a fin stack thermally coupled with the one or more components; and the evacuative fan directs airflow across the fin stack and exits the chassis via the opening in the first zone. ### Claim 3 (depends on 1) The cooling system of claim 1, wherein the second temperature comprises a maximum surface temperature of the bottom cover. ### Claim 4 (depends on 3) The cooling system of claim 3, wherein the maximum surface temperature of the bottom cover is 55 C. ### Claim 5 (depends on 1) The cooling system of claim 1, wherein the pressure barrier comprises one or more of a thermal insulation material, an acoustic insulation material and an electromagnetic isolation material. ### Claim 6 (depends on 5) The cooling system of claim 5, wherein the pressure barrier forms a Faraday cage around the one or more components. ### Claim 7 (depends on 1) The cooling system of claim 1, wherein the hyperbaric fan comprises a dual opposed output fan with an intake on the bottom cover of the chassis. ### Claim 8 An information handling system, comprising: a chassis defining an enclosure of the information handling system, the chassis having a bottom cover, a back panel, two side panels and a front panel; a pressure barrier for dividing the chassis into a plurality of zones; an evacuative fan configured to generate an airflow relative to one or more components of the information handling system in a first zone to an opening in the first zone and to decrease air pressure in the first zone; a hyperbaric fan configured to increase air pressure in a second zone to cause air movement to one or more openings in the second zone; and a controller configured to: operate the evacuative fan to maintain an operating temperature of the one or more components below a first temperature; and operate the hyperbaric fan to maintain a temperature of the chassis below a second temperature. ### Claim 9 (depends on 8) The information handling system of claim 8, wherein: the pressure barrier is formed as a continuous barrier to isolate the one or more components; the evacuative fan is located proximate to a fin stack thermally coupled with the one or more components; and the evacuative fan directs airflow across the fin stack and exits the chassis via the opening in the first zone. ### Claim 10 (depends on 8) The information handling system of claim 8, wherein the second temperature comprises a maximum surface temperature of the bottom cover. ### Claim 11 (depends on 10) The information handling system of claim 10, wherein the maximum surface temperature of the bottom cover is 55 C. ### Claim 12 (depends on 8) The information handling system of claim 8, wherein the pressure barrier comprises one or more of a thermal insulation material, an acoustic insulation material and an electromagnetic isolation material. ### Claim 13 (depends on 12) The information handling system of claim 12, wherein the pressure barrier forms a Faraday cage around the one or more components. ### Claim 14 (depends on 8) The information handling system of claim 8, wherein the hyperbaric fan comprises a dual opposed output fan with an intake on the bottom cover of the chassis. ### Claim 15 A method of cooling an information handling system in a chassis, the chassis having a bottom cover, a back panel, two side panels and a front panel, the method comprising: forming a pressure barrier in the chassis to divide the chassis into a plurality of zones; positioning an evacuative fan in a first zone proximate to one or more components of the information handling system such that the evacuative fan is operable to generate an airflow relative to one or more components of the information handling system in a first zone to an opening in the first zone and decrease air pressure in the first zone; positioning a hyperbaric fan in a second zone such that the hyperbaric fan is operable to increase air pressure in a second zone to cause air movement to one or more openings in the second zone; executing, by a controller communicatively coupled to the evacuative fan and the hyperbaric fan, a set of instructions for: operating the evacuative fan to cool the one or more components below a first temperature; and operating the hyperbaric fan to cool the chassis below a second temperature. ### Claim 16 (depends on 15) The method of claim 15, wherein the second temperature comprises a maximum surface temperature of the bottom cover. ### Claim 17 (depends on 16) The method of claim 16, wherein the maximum surface temperature of the bottom cover is 55 C. ### Claim 18 (depends on 15) The method of claim 15, wherein the controller is configured to operate each of the evacuative fan and the hyperbaric fan independently.