Smart material mechanism for fire sprinklers

A sprinkler for a fire suppression system, comprising:

• a body defining an inlet and an outlet fluidly coupled to the inlet, the inlet and outlet arranged along a longitudinal axis;
• a frame assembly including a frame member coupled to the body and extending away from the outlet, the frame assembly including a screw coupled with the frame member and disposed along the longitudinal axis, the screw having a first recess;
• a deflector coupled to the frame member and offset from the outlet;
• a seal assembly configured to sealingly engage the body to prevent flow through the outlet, the seal assembly having a second recess;
• and
• a shape memory alloy trigger configured to deform from an unactuated configuration to an actuated configuration in response to reaching an activation temperature, the shape memory alloy trigger having a first end and a second end opposite the first end, the first end and the second end are semispherical, the shape memory alloy trigger having a C-shape in the actuated configuration,
• wherein in the unactuated configuration, the shape memory alloy trigger is disposed along the longitudinal axis, the first end of the shape memory alloy trigger directly engages the first recess of the screw of the frame assembly and the second end of the shape memory alloy trigger directly engages the second recess of the seal assembly and holds the seal assembly in sealed engagement with the body;
• and
• wherein in the actuated configuration, the shape memory alloy trigger enables the seal assembly to disengage from the body.