To provide a device which prevents one situation in which a cabin is increased in pressure to give passengers uncomfortable feelings, even if bleeding pressure from aircraft engines is changed, and the condition is thereby changed in an air conditioning mechanism.
A pressure sensor S sensing the change in bleeding pressure, is provided at the front stage of a flow control valve 4 set for a suction line 5 feeding bleeding to an air conditioner 3 from aircraft engines, it is so constituted that an output signal from the pressure sensor S is transferred to an outflow valve 9 controlling pressurization for a cabin 1 by way of an air conditioning controller 6 and a pressurization controller 7. Since the pressure of the cabin 1 is discharged out to atmosphere by the action of the outflow valve 9, even if the conditional change in the air-conditioner and the like thereby allows the amount of air-supply to the cabin 1 to be increased, an increase in pressure is transitionally made small, and passengers and the like are thereby prevented from hurting their feelings.
SATO OSAMU
MITANI HISASHI
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