# US 2019/0170382 A1 · Heating, ventilation, and air conditioning combustion suppression system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170382 A1 - Document ID: US20190170382A1 - Status: Published application - Kind: A1 - Application number: 15/880,230 - Filed: 2018-01-25 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Johnson Controls Technology Company - Applicants: Johnson Controls Technology Company - Inventors: Jamie T. Weinert - Web page: https://patentgrep.com/patent/US20190170382A1 ## CPC - F24F 11/34: by opening air passages - A62C 35/58: Pipe-line systems - F24F 11/0001: {for ventilation (F24F11/30 takes precedence)} - F24F 11/36: to leakage of heat-exchange fluid - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10) ## Abstract A heating ventilation and air conditioning (HVAC) combustion suppression system. The HVAC combustion suppression system includes a sensor that detects and emits a signal indicative of a refrigerant released from an HVAC system into an enclosed space. The system also includes a suppression component that blocks or reduces combustion of the refrigerant in the enclosed space, and a controller that receives the signal from the sensor. The controller in response to the signal activates the suppression component to suppress combustion of the refrigerant in the enclosed space. ## Claims ### Claim 1 A heating ventilation and air conditioning (HVAC) combustion suppression system, comprising: a sensor configured to detect a refrigerant released from an HVAC system into an enclosed space and to emit a signal indicative of the refrigerant; a suppression component configured suppress combustion of the refrigerant in the enclosed space; and a controller configured to receive the signal from the sensor and actuate the suppression component to suppress combustion of the refrigerant in the enclosed space. ### Claim 2 (depends on 1) The system of claim 1, wherein the controller is configured to actuate the suppression component in response to a detected concentration of the refrigerant in excess of a threshold concentration. ### Claim 3 (depends on 1) The system of claim 1, wherein the suppression component comprises a blower, wherein the controller is configured to actuate the blower to draw the refrigerant out of the enclosed space and discharge the refrigerant into the atmosphere. ### Claim 4 (depends on 1) The system of claim 1, wherein the suppression component comprises a pump configured to pump an inert gas from an inert gas supply into the enclosed space. ### Claim 5 (depends on 1) The system of claim 1, wherein the suppression component comprises a valve configured to release a dry chemical from a dry chemical supply into the enclosed space. ### Claim 6 (depends on 1) The system of claim 1, wherein the sensor is a chemical sensor, an optical sensor, or both. ### Claim 7 (depends on 1) The system of claim 1, wherein the sensor is a first sensor, and the system comprises a second sensor configured to detect burning of the refrigerant. ### Claim 8 (depends on 7) The system of claim 7, wherein the first and second sensors are coupled to an air duct upstream from an evaporator coil of the HVAC system. ### Claim 9 (depends on 1) The system of claim 1, wherein the enclosed space is an air duct of the HVAC system. ### Claim 10 A heating ventilation and air conditioning (HVAC) combustion suppression system, comprising: a sensor configured to detect a combustion event in an enclosed space and to emit a signal indicative of the combustion event; a suppression component configured to extinguish the combustion event; and a controller configured to receive the signal from the sensor and activate the suppression component to extinguish the combustion event in the enclosed space. ### Claim 11 (depends on 10) The system of claim 10, wherein the suppression component comprises a blower, wherein the controller is configured to activate the blower to remove a refrigerant from the enclosed space and discharge the refrigerant into the atmosphere. ### Claim 12 (depends on 10) The system of claim 10, wherein the suppression component comprises a pump configured to pump an inert gas from an inert gas supply into the enclosed space. ### Claim 13 (depends on 10) The system of claim 10, wherein the suppression component comprises a valve configured to release a dry chemical into the enclosed space. ### Claim 14 (depends on 10) The system of claim 10, wherein the sensor comprises a chemical sensor, an optical sensor, or both. ### Claim 15 (depends on 10) The system of claim 10, wherein the sensor is coupled to an air duct upstream from an evaporator coil of the HVAC system. ### Claim 16 A heating ventilation and air conditioning (HVAC) combustion suppression system, comprising: a sensor configured detect a refrigerant and/or a combustion event in an enclosed space and to emit a signal indicative of the refrigerant and/or the combustion event; an electronic device; and a controller configured to receive the signal from the sensor and transmit a warning message to the electronic device. ### Claim 17 (depends on 16) The system of claim 16, wherein the warning message comprises an audible tone, a written message, an audible message, a flashing light, or both. ### Claim 18 (depends on 16) The system of claim 16, wherein the electronic device is configured to transmit a signal to the controller to activate a suppression component. ### Claim 19 (depends on 18) The system of claim 18, wherein the suppression component is a pump configured to pump an inert gas from an inert gas supply into the enclosed space. ### Claim 20 (depends on 18) The system of claim 18, wherein the suppression component comprises a valve configured to release a dry chemical into the enclosed space. ### Claim 21 (depends on 16) The system of claim 16, wherein the electronic device comprises a mobile electronic device, a thermostat, a computer, or a combination thereof.