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Vacuum low temperature plasma cleaning machine vacuum pump operation on the role of cleaning effect

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28 Jan,2021

Vacuum low temperature plasma cleaning machine vacuum pump operation on the role of cleaning effect:

Vacuum pump is the key component of vacuum low-temperature plasma cleaning machine. Its role is to vacuum the cavity material to achieve the effect of cleaning activation or improve adhesion, but do you know how to control in the vacuum low temperature plasma cleaning machine, so as to achieve a good practical effect?

Vacuum low temperature plasma cleaning machine
The use of vacuum low-temperature plasma cleaning machine makes people have a certain understanding of product cleaning under vacuum environment. One might ask, "Why vacuum cleaning?" Because cleaning in a vacuum environment can achieve a stronger treatment effect. The product is placed in a sealed chamber for a sustained period of time. If there are small particles such as dust on the surface of the product, it will be removed according to the continuous pumping time. Duration here means that you have to keep the vacuum situation at a relatively stable vacuum state. In addition, the charging and discharging of low-temperature plasma cleaning equipment must be carried out in a stable vacuum environment.
1. Control mode of vacuum pump of small vacuum low temperature plasma cleaning machine:
Most vacuum plasma cleaning machines use vacuum pumps to remove dry, gas pump chamber. Some applications are standalone and some are combined pumps. Small and medium vacuum low temperature plasma cleaning machine adopts independent pump. Its actual operation control panel key consists of keys, status indicator, passive buzzer with display light, output power controller, data display vacuum gauge, timer, knob switch and total flow of float ball. This is made up of dashboards and other components. The start and stop control of the vacuum pump is the immediate control of the DC contactor by means of a lock activated light out button. DC contactor contact point connection and disconnection control vacuum pump three-phase power supply connection and disconnection. This control method can fully take into account the control provisions of small and medium-sized plasma cleaning machine. If this method is used for automatic control, it is not only difficult, but also difficult to stipulate the precision and safety factor of control.
2. On-line and sliding door type vacuum low-temperature plasma cleaning machine vacuum pump control method:
Vacuum plasma cleaners are commonly used for linear and manual doors. The vacuum pump used is 1, 2. They are actually operated and controlled by touch screen. This control mode is divided into manual control and full automatic control.
3. Manual control mode:
The basic principle of most manual controls is similar to that of the test vacuum cryogenic plasma cleaner. Press the relative button to turn on the vacuum pump. The difference is that one is controlled by hardware-configured keys, while the other is controlled by virtual keys on a touch screen. The hardware of the key driver is configured as the electromagnetic coil of the automobile relay, while the soft element of the touch-screen key driver controller. Based on the logical measurement, the controller outputs the results to the output terminal of the controller, the position of the small relay of the driver, and the contact point of the small relay of the alternating vacuum pump of the driver. The contact point of the electromagnetic coil of the vacuum pump is connected and disconnected, so as to control the three-phase power supply of the vacuum pump motor.
4. Full automatic control mode:
Fully automatic control refers to the automatic execution of all positions according to the order of keys. According to the standard of relative logic, the vacuum pump is started and stopped in the control step of the whole process. Whether manual control or automatic control, assuming that the vacuum degree is maintained at a certain value, steam flowmeter alone can not meet the requirements. If you can easily control the speed of the vacuum pump motor, you can easily control the vacuum degree within the set scope. If the vacuum degree of the inner cavity is less than or equal to the preset value, the speed ratio of the vacuum pump motor of the vacuum low-temperature plasma cleaning machine is completely automatically adjusted according to the value, so that the rated power of the motor is kept within the set vacuum degree range; If the vacuum degree of the inner cavity is affected by other factors, and if there is an error between the specific vacuum degree and the set vacuum degree, the program flow will automatically measure the speed of the vacuum pump and automatically adjust to maintain the set vacuum value. This control is called PID control.
P is the proportion effect, I is the integral effect, and D is the differential effect. PID not only has the rapid proportion effect, but also has the error clearance effect of integral effect and the regulation effect of differentiation effect. When the error step occurs, the guidance function takes effect immediately to suppress the error rebound. The ratio also has the function of eliminating error and reducing error intensity. Because the proportion utility is a long-term and dominant control law, the vacuum degree of the inner cavity can be smoothed. Integral utility gradually eliminates error. If the main control parameters of the three functions can be properly adjusted, the advantages of the three control laws can be flexibly used to achieve a good control effect.
Unexpectedly, the vacuum pump control of vacuum low-temperature plasma cleaning machine also applies the proportion integral derivative function from math class. Measure the PID control value in the program flow. The frequency of the soft starter can be controlled by using the 0-10V simulation analog working voltage data signal, and the control mode and related main parameters of the soft starter can be set.

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