The inflator is a trigger device with water-sensitive fiber, which is mainly used to form an automatic charging system with automatic valves. Compared with the traditional triggering inflator, it is characterized by fast starting and strong power at low temperature. The inflator can be triggering within 2 to 4 seconds in a low temperature environment, and stable operation under high temperature, low temperature, high temperature and high humidity conditions. The inflator contains a powerful firing spring that provides 40% to 60% greater piercing energy than standard, improving the piercing success rate for cylinders of all sizes. Once the trigger is flooded, the water sensitive ring ruptured and released the firing rod will strike the automatic valve push rod forward, pushing the needle to Pierce the carbon dioxide cylinder. The carbon dioxide gas in the cylinder immediately passes through the automatic valve to inflate the inflating equipment.