Patent ID: 9075414
Filing Date: 2015-07-07
Classification: G05D,Y10T

Abstract:
1. A pressure control device comprising a pressure sensor that measures a pressure of a fluid flowing in a flow channel, a pressure control valve arranged in the flow channel, and a valve control part that controls the pressure control valve so as to make a measured pressure value measured by the pressure sensor at a set pressure value, wherein the valve control part comprises an open degree operated amount output part that outputs an open degree operated amount of the pressure control valve based on the measured pressure value and the set pressure value, and a limiter part that sets a tolerance of the open degree operated amount by setting a limit value of the open degree operated amount and that controls the pressure control valve at the open degree operated amount of the limit value in a case where the open degree operated amount output by the open degree operated amount output part is out of the tolerance, and the limiter part sets the limit value of the open degree operated amount according to the set pressure value.