Flames and fumes stopping device for suction ducts
AssigneeSTMicroelectronics S.r.l.
InventorGiordano Seragnoli
Life of this patent
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Abstract
A flame and fume stopping device for a suction duct that removes gaseous mixtures from a room includes a normally-empty inverted siphon in the suction duct. A water tank is connected to the inverted siphon by a gravity discharge pipe, and holds a volume of water sufficient for flooding the inverted siphon. The water tank is at a level higher than the inverted siphon. The gravity discharge pipe includes a solenoid valve for discharging the water into the siphon. A sensor for determining the temperature of the gaseous mixture passing through the suction duct generates an electrical command signal that triggers the opening of the solenoid valve when a certain temperature threshold is exceeded.
Claims17
A flame and fume stopping device for a conduit comprising:
- an inverted siphon interposed with the conduit, said inverted siphon having a tubular shape and being devoid of material therein in an unflooded state;
- a tank for holding a volume of liquid sufficient to flood said inverted siphon;
- connecting means for connecting said tank to said inverted siphon;
- a valve connected to said connecting means for discharging the liquid into said inverted siphon for flooding thereof;
- a sensor for sensing temperature of a gaseous mixture passing through the conduit and activating said valve to discharge the liquid when a predetermined temperature threshold is exceeded;
- and
- a discharge valve connected to said inverted siphon for releasing the liquid after said inverted siphon has been flooded so that the inverted siphon is returned again to the unflooded state devoid of material therein for reuse.
A flame and fume stopping device for a conduit that removes a gaseous mixture from a room, the device comprising:
- an inverted siphon interposed with the conduit, said inverted siphon having a tubular shape and being devoid of material therein in an unflooded state;
- a water tank at a level higher than said inverted siphon for holding a volume of water sufficient to flood said inverted siphon;
- a gravity discharge pipe connecting said water tank to said inverted siphon;
- a solenoid valve interposed with said gravity discharge pipe for discharging the water into said inverted siphon for flooding thereof;
- a sensor for sensing temperature of the gaseous mixture passing through the conduit and generating an electrical command signal causing said solenoid valve to discharge the water when a predetermined temperature threshold is exceeded;
- and
- a discharge valve connected to said inverted siphon for releasing the water after said inverted siphon has been flooded so that the inverted siphon is returned again to the unflooded state devoid of material therein for reuse.
A method for stopping flames and fumes in a conduit that removes gaseous mixtures, the method comprising the steps of:
- sensing temperature of a gaseous mixture passing through the conduit;
- generating an electrical command signal for activating a solenoid valve when a predetermined temperature threshold is exceeded for flooding an inverted siphon interposed with the conduit with a liquid, the inverted siphon having a tubular shape and being devoid of material therein in an unflooded state;
- and
- releasing the liquid after said inverted siphon has been flooded using a discharge valve connected to the inverted siphon so that the inverted siphon is returned again to the unflooded state devoid of material therein for reuse.
Dependencies are inferred from the claim text.