# US 11,445,642 B1 · Thermal control with operating point shift for acoustic optimization > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,642 B1 - Document ID: US11445642B1 - Status: Granted - Kind: B1 - Application number: 17/228,509 - Filed: 2021-04-12 - Granted: 2022-09-13 - Earliest claimed: 2021-04-12 - Assignees: Dell Products L.P. - Applicants: Dell Products, LP - Inventors: Jeffrey J. DeMoss - Web page: https://patentgrep.com/patent/US11445642B1 ## CPC - H05K 7/20209: {Thermal management, e.g. fan control} - H05K 7/20836: {Thermal management, e.g. server temperature control} - H05K 7/20718: {Forced ventilation of a gaseous coolant (in closed loop H05K7/20754)} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An information handling system includes at least one air mover configured to cool a device of the information handling system. An air mover control system may control a speed of the air mover at or below a first air mover target speed to maintain a temperature of the device at or below a target temperature that includes a first target temperature and a second target temperature. If the air mover speed is greater than a second air mover target speed and the temperature of the device is greater than the first target temperature, then the target temperature may be set to the second target temperature. If the air mover speed is less than the first air mover target speed and the temperature of the device is less than the first target temperature, then the target temperature may be set to the first target temperature. ## Claims ### Claim 1 A method comprising: maintaining, by a processor, a device at or below a target temperature based on an acoustic limit that includes a first acoustic limit and a second acoustic limit, wherein the target temperature includes a first target temperature and a second target temperature; shifting the target temperature based on whether an operation of the device is within the acoustic limit, wherein the shifting the target temperature further includes: if an acoustic level of the device during the operation is greater than the second acoustic limit and a temperature of the device is greater than the first target temperature then setting the target temperature to the second target temperature; and if the acoustic level of the device during the operation is less than the first acoustic limit and the temperature of the device is less than the first target temperature then setting the target temperature to the first target temperature. ### Claim 2 (depends on 1) The method of claim 1, wherein setting the target temperature to the second target temperature allows throttling of the operation of the device. ### Claim 3 (depends on 1) The method of claim 1, wherein setting the target temperature to the first target temperature allows for a normal operation of the device. ### Claim 4 (depends on 1) The method of claim 1, further comprising increasing the acoustic limit based on the target temperature. ### Claim 5 (depends on 1) The method of claim 1, further comprising decreasing the acoustic limit based on the target temperature. ### Claim 6 (depends on 1) The method of claim 1, wherein the shifting of the target temperature further comprising if the acoustic level of the device during the operation is greater than the second acoustic limit and temperature of the device less than or equal to the first target temperature then keep the target temperature. ### Claim 7 (depends on 1) The method of claim 1, wherein the shifting of the target temperature further comprising if the acoustic level of the device during the operation is then than the first acoustic limit and temperature of the device greater to the first target temperature then keep the target temperature. ### Claim 8 An information handling system, comprising: at least one air mover configured to cool a device of the information handling system; and an air mover control system configured to: control a speed of the air mover at or below a first air mover target speed to maintain a temperature of the device at or below a target temperature that includes a first target temperature and a second target temperature, wherein the control of the speed further includes: monitoring the temperature of the device and the air mover speed; if the air mover speed is greater than a second air mover target speed and the temperature of the device is greater than the first target temperature then setting the target temperature to the second target temperature; and if the air mover speed is less than the first air mover target speed and the temperature of the device is less than the first target temperature, then setting the target temperature to the first target temperature. ### Claim 9 (depends on 8) The information handling system of claim 8, wherein when the target temperature is set to the second target temperature allows for throttled operation of the device. ### Claim 10 (depends on 8) The information handling system of claim 8, wherein when the target temperature is set to the first target temperature allows for full operation of the device. ### Claim 11 (depends on 8) The information handling system of claim 8, wherein the air mover control system is further configured to increase the air mover speed based on the target temperature. ### Claim 12 (depends on 8) The information handling system of claim 8, wherein the air mover control system is further configured to decrease the air mover speed based on the target temperature. ### Claim 13 (depends on 8) The information handling system of claim 8, wherein the control of the air mover speed further comprising if the air mover speed is greater than the second air mover target speed and the temperature of the device is less than or equal to the first target temperature then keep the target temperature. ### Claim 14 A non-transitory computer-readable medium including code that when executed performs a method, the method comprising: maintaining operation of a device at or below a target temperature that includes a first target temperature or a second target temperature; controlling a speed of an air mover at or below a first air mover target speed to maintain a temperature of the device at or below the first target temperature; if the air mover speed is greater than a second air mover target speed and the temperature of the device is greater than the first target temperature, then setting the target temperature to the second target temperature; and if the air mover speed is less than the first air mover target speed and the temperature of the device is less than the first target temperature, then setting the target temperature to the first target temperature. ### Claim 15 (depends on 14) The method of claim 14, wherein the setting of the target temperature to the second target temperature allows throttling the operation of the device. ### Claim 16 (depends on 14) The method of claim 14, wherein the setting of the target temperature to the first target temperature allows for normal operation of the device. ### Claim 17 (depends on 14) The method of claim 14, further comprising increasing the air mover speed based on the target temperature. ### Claim 18 (depends on 14) The method of claim 14, further comprising decreasing the air mover speed based on the target temperature. ### Claim 19 (depends on 14) The method of claim 14, wherein the controlling of the air mover speed further comprising if the air mover speed is greater than the second air mover target speed and the temperature of the device is less than or equal to the first target temperature then keep the target temperature. ### Claim 20 (depends on 14) The method of claim 14, wherein the controlling of the air mover speed further comprising if the air mover speed is greater than the second air mover target speed and the temperature of the device is less than or equal to the first target temperature then keep the target temperature.