Vehicle fire suppression system and control method thereof

A vehicle fire suppression system comprising:

• a vehicle cooling device having a refrigerant line circulating around a compressor, a condenser, an expansion valve, an evaporator, and a gas-liquid separator;
• an extinguishing fluid container in which an extinguishing fluid is stored;
• a multi-way valve provided upstream of the compressor on the refrigerant line to control a refrigerant introduced into the compressor, and connected to the extinguishing fluid container to regulate the extinguishing fluid supplied to the compressor;
• a controller configured to control the multi-way valve to implement a cooling operation or an extinguishing operation of the cooling device;
• and
• a fire extinguishing nozzle provided on the refrigerant line to eject the extinguishing fluid from the refrigerant line to the outside of the cooling device,
• wherein a separate refrigerant discharge port is provided in the compressor of the vehicle fire suppression system, a branch point is formed in the refrigerant line between the compressor and the condenser, a separate discharge valve is provided between the separate refrigerant discharge port and the branch point, and the controller is configured to control the separate discharge valve to prevent mixing of the extinguishing fluid and the refrigerant in the compressor.