# US 11,452,243 B2 · Cooling system, controllers and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,243 B2 - Document ID: US11452243B2 - Status: Granted - Kind: B2 - Application number: 16/158,227 - Filed: 2018-10-11 - Published: 2019-04-18 - Granted: 2022-09-20 - Earliest claimed: 2017-10-12 - Assignees: CoolIT Systems, Inc. - Applicants: CoolIT Systems, Inc. - Inventors: Geoff Sean Lyon; Pat McGinn; Mike Holden; Brydon Gierl - Web page: https://patentgrep.com/patent/US11452243B2 ## CPC - H05K 7/20836: {Thermal management, e.g. server temperature control} - F28F 27/00: Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus (control arrangements in general G05) - H05K 7/20272: {Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds} - H05K 7/20781: {within cabinets for removing heat from server blades} - F28F 23/02: Arrangements for obtaining or maintaining same in a liquid state - F28F 2009/222: {Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit} - F28F 2250/08: Fluid driving means, e.g. pumps, fans - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract Aspects of liquid operational systems are described. According to one aspect, a system to automatically fill a liquid operational component is described. According to another aspect, a self-diagnostic system is described. According to yet another aspect, a flow conditioning arrangement is described. A control system for a heat-transfer system includes a plurality of sensors. Each sensor is configured to observe an operational parameter indicative of a thermodynamic quantity and to emit a signal containing information corresponding to the observed operational parameter. Control logic includes a processing unit and instructions stored on a memory that, when executed by the processing unit, cause the control logic to determine a first thermodynamic quantity associated with each sensor from information contained in a signal from the respective sensor; determine a second thermodynamic quantity associated with each sensor from information contained in a signal received from at least one other sensor in the plurality of sensors; compare the first thermodynamic quantity with the second thermodynamic quantity; and responsive to the comparison of the first thermodynamic quantity with the second thermodynamic quantity, output a control signal. ## Claims ### Claim 1 A control system for an electronics-cooling system comprising a liquid coolant, a plurality of cooling nodes, each being configured to facilitate heat transfer from an electronic component to the liquid coolant, a heat-transfer device configured to facilitate heat rejection from the liquid coolant to another medium, and a pump fluidically coupled with the plurality of cooling nodes and the heat-transfer device, the control system comprising: a plurality of sensors, wherein each sensor is configured to observe a respective operational parameter indicative of a corresponding thermodynamic quantity of the electronics-cooling system and to emit a signal containing information corresponding to the observed operational parameter; control logic comprising a processing unit and instructions stored on a memory that, when executed by the processing unit, cause the control logic to: determine a first measure of the thermodynamic quantity associated with each sensor from information contained in a signal from the respective sensor; determine a second measure of the thermodynamic quantity associated with each sensor from information contained in a signal received from at least one other sensor in the plurality of sensors; determine a state-of-health for each respective sensor in the plurality of sensors from a comparison or a combination of the first measure of the thermodynamic quantity with the second measure of the thermodynamic quantity for the respective sensor; and responsive to the determined state-of-health for the plurality of sensors, output a control signal corresponding to the determined state-of-health for each respective sensor in the plurality of sensors. ### Claim 2 (depends on 1) The control system according to claim 1, wherein the instructions, when executed by the processing unit, further cause the control logic to determine the state-of-health for each sensor based in part on a difference between the first measure of the thermodynamic quantity and the second measure of the thermodynamic quantity exceeding a threshold difference or falling below a threshold difference. ### Claim 3 (depends on 1) The control system according to claim 1, wherein the plurality of sensors comprises a temperature sensor, and wherein the instructions, when executed by the processing unit, further cause the control logic to predict a temperature corresponding to the temperature sensor from information contained in a signal received from at least one other sensor in the plurality of sensors. ### Claim 4 (depends on 1) The control system according to claim 1, wherein the plurality of sensors comprises a pressure sensor, and wherein the instructions, when executed by the processing unit, further cause the control logic to predict a pressure corresponding to the pressure sensor from information contained in a signal received from at least one other sensor in the plurality of sensors. ### Claim 5 (depends on 1) The control system according to claim 1, wherein the plurality of sensors comprises one or more of a temperature sensor, a pressure sensor, a liquid detection sensor, a flow sensor, and a fluid-level sensor. ### Claim 6 (depends on 1) The control system according to claim 1, further comprising a communication connection configured to communicate the control signal from the control logic to the pump, wherein the pump is operable responsive to the control signal. ### Claim 7 (depends on 1) The control system according to claim 1, wherein the electronics-cooling system further comprises a valve and the control system further comprises a communication connection configured to communicate the control signal from the control logic to the valve, wherein the valve is operable responsive to the control signal. ### Claim 8 (depends on 1) The control system according to claim 1, wherein the act of determining the state-of-health for each sensor comprises predicting a thermodynamic state variable for the liquid coolant at a position corresponding to the respective sensor, wherein the instructions, when executed by the processing unit, cause the control logic to output the control signal responsive to a value of the thermodynamic state variable exceeding a threshold value or falling below a threshold value. ### Claim 9 (depends on 1) The control system according to claim 1, wherein the act of determining the state-of-health for each sensor comprises predicting a value of a thermodynamic state variable for the liquid coolant at a position of a selected one of the plurality of sensors in the electronics-cooling system, wherein the instructions, when executed by the processing unit, further cause the control logic to: compare or combine the predicted value of the thermodynamic state variable with a value of the thermodynamic state variable determined from the selected one of the plurality of sensors; and output the control signal responsive to the comparison or combination of the predicted value of the thermodynamic state variable with the determined value of the thermodynamic state value. ### Claim 10 (depends on 1) The control system according to claim 1, further comprising a plurality of controllable devices communicatively coupled with the control logic, wherein the instructions, when executed by the processing unit, further cause the control logic to control operation of each in the plurality of controllable devices responsive to information contained in each signal from one or more of the plurality of sensors. ### Claim 11 A method of controlling an electronics cooling system comprising liquid coolant, a plurality of cooling nodes, each being configured to facilitate heat transfer from an electronic component to the liquid coolant, a heat-transfer device configured to facilitate heat rejection from the liquid coolant to another medium, and a pump fluidically coupled with the plurality of cooling nodes and the heat-transfer device, the method comprising: with each in a plurality of sensors, observing an operational parameter of the electronics-cooling system corresponding to a thermodynamic quantity of the liquid coolant; communicating a measure of each observed operational parameter to a control logic comprising a processing unit and a memory; with the control logic, determining a first measure of the thermodynamic quantity associated with each sensor in the plurality of sensors from information contained in a signal from the corresponding sensor; with the control logic, determining a second measure of the thermodynamic quantity associated with each sensor from information contained in a signal received from at least one other sensor in the plurality of sensors; with the control logic, determining a state-of-health for each respective sensor in the plurality of sensors from a comparison or a combination of the first measure of the thermodynamic quantity with the second measure of the thermodynamic quantity for the respective sensor; and with the control logic, responsive to determined state-of-health for the plurality of sensors, outputting a control signal corresponding to the determined state-of-health for each respective sensor in the plurality of sensors. ### Claim 12 (depends on 11) The method according to claim 11, wherein the act of determining a state-of-health for each respective sensor comprises determining whether a difference between the first measure of the thermodynamic quantity and the second measure of the thermodynamic quantity exceeds a threshold difference or falls below a threshold difference. ### Claim 13 (depends on 11) The method according to claim 11, wherein the plurality of sensors comprises a temperature sensor, and wherein the act of determining the second measure of the thermodynamic quantity comprises predicting a temperature corresponding to the temperature sensor from information contained in a signal received from at least one other sensor in the plurality of sensors. ### Claim 14 (depends on 11) The method according to claim 11, wherein the plurality of sensors comprises a pressure sensor, and wherein the act of determining the second measure of the thermodynamic quantity comprises predicting a pressure corresponding to the pressure sensor from information contained in a signal received from at least one other sensor in the plurality of sensors. ### Claim 15 (depends on 11) The method according to claim 11, wherein the plurality of sensors comprises one or more of a temperature sensor, a pressure sensor, a liquid detection sensor, a flow sensor, and a fluid-level sensor. ### Claim 16 (depends on 11) The method according to claim 11, wherein the electronics-cooling system further comprises a communication connection and the method further comprises communicating the control signal with the communication connection from the control logic to the pump, wherein the pump is operable responsive to the control signal. ### Claim 17 (depends on 11) The method according to claim 11, wherein the electronics-cooling system further comprises a valve and method further communicating the control signal from the control logic to the valve, wherein the valve is operable responsive to the control signal. ### Claim 18 (depends on 11) The method according to claim 11, wherein the act of determining a state-of-health for each respective sensor comprises predicting a value of a thermodynamic state variable for the liquid coolant, wherein the instructions, when executed by the processing unit, cause the control logic to output the control signal responsive to the predicted value of the thermodynamic state variable exceeding a threshold value or falling below a threshold value. ### Claim 19 (depends on 11) The method according to claim 11, wherein the act of comparing or combining the first measure of the thermodynamic quantity with the second measure of the thermodynamic quantity comprises predicting a value of a thermodynamic state variable for the liquid coolant at a position of a selected one of the plurality of sensors in the heat-transfer system, wherein the method further comprises: determining a value of the thermodynamic state variable for the liquid coolant at the position of the selected sensor from an output of the selected sensor; comparing or combining the predicted value of the thermodynamic state variable and the determined value of the thermodynamic state variable, wherein the act of outputting the control signal comprises outputting the control signal responsive to the comparison or combination of the predicted value with the determined value. ### Claim 20 (depends on 11) The method according to claim 11, wherein the electronics-cooling system further comprises a plurality of controllable devices communicatively coupled with the control logic, the method further comprising, with the control logic, controlling operation of each in the plurality of controllable devices responsive to each signal from one or more of the plurality of sensors.