| 摘要 |
An electronic gas blender system (10) includes a pressurized oxygen supply (30) connected in-line to a first proportional valve (32), a first check valve (34) and a first flow sensor (36) by a first circuit of gas lines (15), a pressurized air supply (40) connected in-line to a second proportional valve (42), a second check valve (44) and a second flow sensor (46) by a second circuit of gas lines, and a port (54) disposed between the second check valve (44) and the second flow sensor (46) on the second circuit of gas lines for providing airflow access to a low pressure source. The port (54) includes a plug (52) configured to open and close the airflow access, and a control module (20) is electrically coupled to the first proportional valve (32), the first flow sensor (36), the second proportional valve (42), and the second flow sensor (46). The electronic gas blender system (10) can be used to blend two high pressure gas sources under dynamic control or one high pressure and one zero or low pressure gas flow source through a slave/master relationship. |
