US 12,268,912 B2
Operating an aspirating fire detector system
Jose Manuel Munuera Garcia, Barcelona (ES)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
Filed on Jun. 17, 2022, as Appl. No. 17/843,070.
Claims priority of application No. 21382546 (EP), filed on Jun. 21, 2021.
Prior Publication US 2022/0401776 A1, Dec. 22, 2022
Int. Cl. A62C 37/50 (2006.01); A62C 37/36 (2006.01); G01N 1/24 (2006.01); G01N 1/26 (2006.01)
CPC A62C 37/50 (2013.01) [A62C 37/36 (2013.01); G01N 1/24 (2013.01); G01N 1/26 (2013.01); G01N 2001/245 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of operating an aspirating fire detector system (3, 30) comprising a fire detector (19), a conduit (7) having an inlet and being connected to the fire detector (19), a ventilator (15) configured to draw air through the inlet of the conduit (7) and into the fire detector (19), a pressure sensor (13) configured to sense the pressure of air that is drawn through the inlet and into the fire detector (19), and a flow meter (17) configured to measure the flow of the air drawn through the inlet and to the fire detector (19), the method comprising:
drawing air through the inlet of the conduit (7) and to the fire detector (19) with the ventilator (15);
measuring the flow of the air drawn through the inlet of the conduit (7) and to the detector (19) using the flow meter (17) and producing an air flow signal;
measuring the pressure of the air that is drawn through the inlet of the conduit (7) and to the fire detector using the pressure sensor (13);
detecting a sudden change in pressure of the air that is drawn through the inlet of the conduit (7) and to the fire detector (19); and
implementing a corrective measure to prevent the air flow signal from exceeding or falling below a predetermined threshold as a result of the detected sudden change in pressure, wherein the predetermined threshold is indicative of a fault.