Proportional Safe Industrial Electro Pneumatic Regulator

Pneumatic proportional valve is the key component of medical ventilator. For the anesthesia machine, the requirements of high frequency, accuracy and stability of the control system are higher and higher. According to a pneumatic proportional valve trial produced by Nuo Nengtai company, the integrated IC is used as the key of the control board, and the stereo double loop control method closely combined with the controller design is selected, which integrates the driver, operational amplifier and communication interface, A pneumatic proportional valve flow control system is designed based on the inductor power supply circuit. Compared with the traditional proportional valve control board, the system software coordination ability is improved, and the constant and dynamic characteristics are improved. The test shows that the reasonable range of output steam flow is 7 ~ 180L / min, the constant deviation, the response speed, the output flow is stable, and the system software has strong expansibility. The application regulations of medical ventilator are considered.