Air pressure system

An air pressure system for supplying

• compressed air discharged from an air compressor through an air tank and a piping system to a plurality of terminals that consume the compressed air, comprising:
• a compressor pressure sensor for measuring pressure of compressed air discharged from the air compressor;
• a plurality of terminal pressure sensors for measuring pressures of compressed air supplied respectively to the terminals;
• a flow rate difference calculating device for calculating deviation information on a basis of a capacity of the air tank, information on the piping system, the pressure of compressed air discharged from the air compressor, and the pressures of compressed air supplied respectively to the terminals;
• and
• a control device for controlling operation of the air compressor on a basis of the deviation information, wherein
• the flow rate difference calculating device
• is configured to calculate a rate of air used by the terminals and a flow rate of air discharged from the air compressor from the capacity of the air tank, the information on the piping system, the pressure of compressed air discharged from the air compressor, and the pressures of compressed air supplied respectively to the terminals, and
• is configured to calculate the deviation information from the rate of air used by the terminals and the flow rate of air discharged from the air compressor.