Patent ID: 9116526
Filing Date: 2015-08-25
Classification: G01N,G05D,Y10T

Abstract:
1. A gas concentration controller system configured to mix a first gas and a second gas at a predetermined ratio to produce mixed gas having a predetermined concentration, the gas concentration controller system comprising: a first gas line that is provided with a first gas flow rate controlling mechanism for controlling a flow rate of the first gas; a second gas line that is provided with a second gas flow rate controlling mechanism for controlling a flow rate of the second gas; an output gas line that is joined by the first gas line and the second gas line and configured to output the mixed gas having the predetermined concentration; an exhaust gas line that is connected to an upstream side of the second gas flow rate controlling mechanism in the second gas line and provided with an on/off valve and a flow rate control part configured to flow the second gas in the exhaust gas line; and a control part configured to, depending on the flow rate of the second gas flowing through the second gas line or a type of the second gas, switch on/off the on/off valve provided in the exhaust gas line, while the flow rate of the second gas in the second gas line is being controlled by the second gas flow rate controlling mechanism.