I. Use flow control valves
Flow control valves can be installed on the outlet or inlet pipelines of micro air pumps. By manually or automatically adjusting the opening degree of the valve, the flow rate of gas can be controlled. Manual flow control valves have a lower cost but require manual operation and monitoring. Automatic flow control valves can be used in conjunction with sensors and controllers to achieve automatic and precise flow control.
II. Adopt variable frequency speed regulation technology
For micro air pumps driven by motors, variable frequency speed regulators can be used to control the motor speed. By changing the motor speed, the flow output of the air pump can be adjusted. Variable frequency speed regulation technology can achieve precise flow control and has the advantage of energy saving. In implementation, it is necessary to select a suitable frequency converter according to the characteristics and working requirements of the air pump, and perform parameter setting and debugging.
III. Use pressure sensor feedback control
Install a pressure sensor on the output pipeline of the air pump to monitor the gas pressure in real time. According to the pressure feedback signal, the working state of the air pump is adjusted through the controller to achieve the purpose of controlling the flow. For example, if the pressure is too high, the speed of the air pump can be reduced or the valve opening can be decreased; if the pressure is too low, the speed of the air pump can be increased or the valve opening can be increased.
IV. Pulse width modulation (PWM) control
For some micro air pumps that can be controlled electronically, PWM technology can be used to control the working time and intermittent time of the air pump to adjust the flow. By changing the duty cycle of the PWM signal, the average output flow of the air pump can be controlled. This method is suitable for occasions where the flow control accuracy requirement is not high.
V. Intelligent control system
Combine sensors, controllers and communication technologies to build an intelligent micro air pump control system. This system can monitor the operating status and flow parameters of the air pump in real time, and automatically adjust the working parameters of the air pump according to the preset control strategy to achieve precise flow control. The intelligent control system can also improve the reliability and convenience of the system through remote monitoring and operation.
When choosing a precise flow control scheme for micro air pumps, the following factors need to be considered.
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