# US 12,007,285 B2 · Wireless fluid temperature sensing of a multiway valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,285 B2 - Document ID: US12007285B2 - Status: Granted - Kind: B2 - Application number: 17/398,263 - Filed: 2021-08-10 - Published: 2022-02-17 - Granted: 2024-06-11 - Earliest claimed: 2020-08-11 - Assignees: WOCO Industrietechnik GmbH - Applicants: WOCO Industrietechnik GmbH - Inventors: Domenico Solazzo - Web page: https://patentgrep.com/patent/US12007285B2 ## CPC - G01K 13/026: {of moving liquids} - G01K 1/024: for remote indication - G01K 7/22: the element being a non-linear resistance, e.g. thermistor (G01K7/26 takes precedence) - H01C 7/04: having negative temperature coefficient - F16K 31/002: {actuated by temperature variation (thermo-electric F16K31/025)} - F16K 31/0668: {Sliding valves} - F16K 31/0675: {Electromagnet aspects, e.g. electric supply therefor} - G01K 2205/00: Application of thermometers in motors, e.g. of a vehicle - G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00) - H01C: RESISTORS - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract The embodiments relate to a method for detecting the temperature of a fluid flow of a control valve which has an electromagnetic actuator, in which a temperature-sensitive resistor is exposed to the fluid flow, and is integrated into a detection circuit. As a function of the fluid temperature, a primary circuit of the electromagnetic actuator is inductively influenced by the detection circuit. ## Claims ### Claim 1 A method for detecting a fluid temperature of a fluid flow of a control valve with an electromagnetic actuator, the method comprising: exposing the fluid flow to a temperature-sensitive resistor; integrating the temperature-sensitive resistor into a detection circuit; and inductively influencing, by the detection circuit, a primary circuit of the electromagnetic actuator, wherein the inductively influencing depends on the fluid temperature, wherein the detection circuit is configured to detect a power consumption change of the primary coil of the electromagnetic actuator, and to associate it to the fluid temperature. ### Claim 2 (depends on 1) The method of claim 1, wherein a change of a magnetic field of the primary circuit and/or a change of a current of the primary circuit, is associated with the fluid temperature. ### Claim 3 (depends on 1) The method of claim 1, wherein as a result of the inductive interference of the primary circuit, an energy consumption changes. ### Claim 4 (depends on 3) The method of claim 3, wherein the fluid temperature is inferred via the energy consumption change. ### Claim 5 (depends on 1) The method of claim 1, further comprising: monitoring the fluid temperature continuously or cyclically; and deriving control and/or regulation measures based on the monitoring. ### Claim 6 (depends on 1) The method of claim 1, wherein the temperature-sensitive resistor comprises a thermistor. ### Claim 7 A device for detecting a fluid temperature of a fluid flow of a control valve having an electromagnetic actuator, the device comprising: a detection circuit having integrated therein a temperature-sensitive resistor exposed to the fluid flow, wherein the detection circuit is configured to inductively influence the electromagnetic actuator; and electronics configured to: associate the inductive influence of the electromagnetic actuator with the fluid temperatures, detect a power consumption change of a primary coil of the electromagnetic actuator, and associate the power consumption change to the fluid temperature. ### Claim 8 (depends on 7) The device of claim 7, wherein the temperature-sensitive resistor comprises a thermistor. ### Claim 9 (depends on 8) The device of claim 8, wherein the thermistor comprises a Negative Temperature Coefficient thermistor. ### Claim 10 (depends on 8) The device of claim 8, wherein the detection circuit further comprises a detection coil with which the temperature-sensitive resistor is connected in series. ### Claim 11 (depends on 10) The device of claim 10, wherein the temperature-sensitive resistor is configured to change its resistance value as a result of a change in the fluid temperature and to change the power consumption of the detection coil. ### Claim 12 (depends on 11) The device of claim 11, wherein the detection coil is inductively coupled to the primary coil of the electromagnetic actuator, such that the power consumption of the detection coil changes. ### Claim 13 (depends on 7) The device of claim 7, wherein: the electronics are configured to monitor the fluid temperature; or the electronics are coupled to monitoring electronics for monitoring the fluid temperature. ### Claim 14 A control valve for adjusting a fluid flow of a motor vehicle, the valve comprising: an actuating element; an electromagnetic actuator, coupled to the actuating element, configured to apply actuating forces; and a device configured to detect a fluid temperature of the fluid flow and including a detection circuit having integrated therein a temperature-sensitive resistor exposed to the fluid flow and electronics, wherein the detection circuit is configured to inductively influence the electromagnetic actuator, and wherein the electronics configured to detect a power consumption change of a primary coil of the electromagnetic actuator and associate the power consumption change to the fluid temperature. ### Claim 15 (depends on 14) The control valve of claim 14, further comprising: a control valve housing with at least one fluid channel; and an actuating element, movable in a valve chamber defined by the control valve housing, configured to open and/or close the at least one fluid channel; wherein the device is configured to detect the fluid temperature in the valve chamber. ### Claim 16 (depends on 15) The control valve of claim 15, further comprising: an electromagnetic actuator, having a primary coil integrated in a primary circuit, configured to actuate the actuating element; and a detection coil, integrated in the detection circuit, configured to detect the fluid temperature, wherein the detection circuit has a temperature-sensitive resistor exposed to the fluid flow and configured to inductively influence the primary circuit depending on the fluid temperature. ### Claim 17 (depends on 15) The control valve of claim 15, wherein the detection circuit further comprises: a detection coil; and a temperature-sensitive resistor coupled to the detection coil and exposed to the fluid flow, wherein the detection coil and/or the temperature-sensitive resistor are fixedly attached to the actuating element or to the control valve housing. ### Claim 18 (depends on 17) The control valve of claim 17, wherein the detection coil and/or the temperature-sensitive resistor are fixedly attached to a valve seat in the fluid channel.