Device and method for pressurizing machinery space structure and measuring its amount of leakage

The invention provides a kind of equipment used in forcing to the cabin mechanism and measuring the leakage content of the cabin mechanism which includes an air supplying pipeline used to make the compression air supplied to the cabin mechanism from the compression air source; an air supplying valve; a pressure sensor used in sensing the pressure of the cabin mechanism inner and supplying the signal represented the inner pressure of the cabin mechanism; an air discharge pipeline used to discharge the air from the cabin mechanism inner to the air escapement; and a air discharge valve. An electronic control unit suits (ECU)for controlling the air supplying valve and the air discharge valve according to the signal offering by the pressure sensor so the forcing air is supplied to the cabin mechanism then discharges the air from the cabin mechanism inner in later.