Fire suppression system for vehicle

A fire suppression apparatus for a vehicle comprising:

• a docking unit disposed on an exterior panel of a vehicle body, the docking unit being installed on the exterior panel configured to cover an interior space of the vehicle, the docking unit having a hole through which a fire-fighting hose for supply of a fire-fighting water or a spray nozzle connected to the fire-fighting hose passes;
• a supply pipe having a first end connected to the docking unit;
• and
• a nozzle assembly arranged in the interior space of the vehicle and connected to a second end of the supply pipe, the nozzle assembly configured to spray the fire-fighting water, which is supplied through the supply pipe from the fire-fighting hose or the spray nozzle, to extinguish a fire in the interior space of the vehicle in case of fire,
• wherein the docking unit includes a docking coupler having a pipe shape and coupled to the exterior panel of the vehicle body such that an internal passage of the docking coupler communicates with the hole,
• wherein the internal passage of the docking unit comprises a thread on an inner peripheral surface thereof configured to couple with the fire-fighting hose,
• wherein the docking coupler includes:
• a first coupler pipe part extending through and communicating with the hole, the first coupler pipe part having a thread on an inner peripheral surface thereof;
• and
• a second coupler pipe part connected and communicating with the first coupler pipe part, the second coupler pipe part having a diameter smaller than that of the first coupler pipe part and having a thread on an inner peripheral surface thereof.