Dual stage fire sprinkler head and fire suppression system

A fire suppression system, comprising:

• a water source;
• a conduit system coupled to the water source;
• and
• a plurality of sprinkler heads coupled to the conduit system and configured to receive a flow of fluid from the water source through the conduit system and selectively disperse the fluid, each of the sprinkler heads comprising:
• a housing comprising an internal bore;
• a deflector assembly coupled to a distal end of the housing and comprising a body, an aperture formed in the body and in fluid communication with the internal bore of the housing, and a deflector;
• and
• a dual stage activation assembly comprising an actuation mechanism disposed within the internal bore of the housing and comprising a selectively extendable actuation rod, a primary sealing assembly comprising a primary frangible bulb and a primary seal, and a secondary sealing assembly comprising a secondary frangible bulb and a secondary seal.

A method of operating a fire suppression system, comprising:

• providing a fire suppression system comprising a water source, a conduit system coupled to the water source, and a plurality of sprinkler heads coupled to the conduit system and configured to receive a flow of fluid from the water source through the conduit system and selectively disperse the fluid, each of the sprinkler heads comprising:
• a housing comprising an internal bore;
• a deflector assembly coupled to a distal end of the housing and comprising a body, an aperture formed in the body and in fluid communication with the internal bore of the housing, and a deflector;
• and a dual stage activation assembly comprising an actuation mechanism disposed within the internal bore of the housing and comprising a selectively extendable actuation rod, a primary sealing assembly comprising a primary frangible bulb and a primary seal, and a secondary sealing assembly comprising a secondary frangible bulb and a secondary seal;
• activating a first stage flow of fluid through a first fire sprinkler head of the plurality of fire sprinkler heads in response to the first fire sprinkler head detecting a fire hazard;
• automatically resealing the first fire sprinkler head with the secondary sealing assembly of the first fire sprinkler head by the actuation rod of the actuation mechanism of the first fire sprinkler linearly driving the secondary sealing assembly of the first fire sprinkler head into an operational position to stop the first stage flow of fluid through the first fire sprinkler head after activating the first stage flow of fluid through the first fire sprinkler head for a predetermined period of time;
• and
• selectively (1) activating a second stage flow of fluid through the first fire sprinkler head in response to the first fire sprinkler head detecting that the fire hazard was not controlled by the first stage of the flow of fluid through the first fire sprinkler head or (2) not activating the second stage flow of fluid through the first fire sprinkler head in response to the first fire sprinkler head detecting that the fire hazard was controlled by the first stage of the flow of fluid through the first fire sprinkler head.