Patent ID: 6104301
Filing Date: 2000-08-15
Classification: A62C

Abstract:
An automatic fire detection and suppression system, comprising:a vessel for containing a fire extinguishant under pressure;a dip tube assembly sealingly engaged within an opening of the vessel, the assembly including a dip tube with one end extending inside the vessel and the other end being external to the vessel;a solenoid valve having an inlet and an outlet, the inlet being connected to the other end of the dip tube, the valve being normally closed;a nozzle assembly connected to the outlet, the nozzle assembly including a discharge nozzle for discharging extinguishant;a circuit board coupled to the solenoid valve;a housing for receiving the circuit board;a microprocessor received on and coupled with the circuit board; anda heat sensor and an ionic smoke sensor coupled to the microprocessor for sensing heat and/or smoke, wherein the microprocessor has logic for detecting heat or smoke, logic for calculating a rate of rise or for comparing to an ionic smoke density formula for determining the presence of a fire, and logic for opening the solenoid valve when the presence of a fire is determined so that the extinguishant is released to suppress the fire.