Airtightness detection system and airtightness detection method

An airtightness detection system for detecting airtightness of a product, comprising:

• a gas storage buffer tank adapted to be connected to the product;
• a valve between the product and the gas storage buffer tank for opening or closing an air passage between the product and the gas storage buffer tank;
• a pumping motor connected to the gas storage buffer tank for inputting compressed gas into the gas storage buffer tank;
• a pressure gauge connected to the gas storage buffer tank for monitoring an instantaneous air pressure in the gas storage buffer tank;
• and
• a terminal connected to the pumping motor and the pressure gauge, the terminal comprising:
• a memory unit storing a predetermined critical air pressure value;
• a judging unit;
• a processor adapted to implement instructions;
• and
• a storage storing a plurality of instructions adapted to be loaded and executed by the processor;
• and
• wherein the processor loads and executes:
• turning on the pumping motor in a state where the valve is closed, inputting compressed gas into the gas storage buffer tank until the instantaneous air pressure value of the pressure gauge reaches a preset air pressure value;
• and turning off the pumping motor;
• wherein the preset air pressure value is larger than the critical air pressure value;
• maintaining the airtightness detection system standing for a preset detection period in a state where the valve is open, obtaining the instantaneous air pressure value of the pressure gauge during the detection period, and storing the instantaneous air pressure value of the pressure gauge to the memory unit;
• controlling the judging unit to obtain the critical air pressure value and the instantaneous air pressure value of the pressure gauge, and controlling the judging unit to compare the critical air pressure value and the instantaneous air pressure value and to determine whether the instantaneous air pressure value of the pressure gauge is between the preset air pressure value and the critical air pressure, and to determine the airtightness detection result of the product.