Micro-vacuum pump vacuum absorption of the essence: the use of micro-vacuum pump power, the negative pressure generated by the suction port and the pressure difference between the outside atmosphere, through a suction cup of a class of contact elements firmly sucked objects, which play hanging, fixed, moving objects And so on.
The next step of vacuum adsorption is the release of the object after being sucked.
When it is necessary to release the sucked object, the pump must first be shut down and not to be evacuated. After the pump is shut down, the object will not necessarily fall off immediately because the pump has a certain packing ability and the vacuum will continue for a certain period of time (the length of time depends on the leak of the system).
Some friends said that I know there is a miniature air pump, you can pump air duality, model is PCF5015N, why not this cycle pumping, the object adsorption, cheer the next cycle, the outside air hit the suction cup, not it can Did you release the object quickly?
Some friends think that the miniature vacuum pump (ie single suction miniature negative pressure pump) during this cycle, suction, the object adsorption; the next cycle, the motor reversing inflatable, filling the outside air into the suction cup, not the object can be quickly released Yet?
Friends with the above two ideas can understand. Because in their view, pump exhaust port, exhaust port is interchangeable, so to achieve their idea is feasible;
However, the actual situation is that the current miniature air pump, miniature vacuum pump and so on, including domestic miniature air pump, miniature vacuum pump and most foreign miniature air pump, miniature vacuum pump, etc., because of internal process and other reasons, only allows the gas Unidirectional flow from the intake port to the exhaust port, on the contrary not. It is not a simple reversal of the motor that can change the direction of the air flow to meet the above requirements for releasing the object.
To release immediately, there are two ways for reference:
First, the gas system should be an additional branch to connect an on-off valve, the pump is turned on, the valve closed to form a closed system; micro-vacuum pump to the system (to be precise that the contacts such as suction cup inside) to complete the vacuum Vacuum adsorption purposes. The next process, the pump down and open the valve at the same time, so that outside air into the air system immediately eliminate the vacuum, so as to reliably release objects.
Second, with the solenoid valve, switch the direction of the system airflow, without changing the direction of the airflow inside the pump. But the electromagnetic valve will have a decay to the pump flow rate, then need to choose our flow miniature vacuum pump models, such as the PC3025N or VCA5038, their flow at 25 l / min and 38 l / min.
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