Siphon type airflow control device and method

Abstract

The invention discloses a siphon type airflow control device and a siphon type airflow control method. The device comprises a cylinder (3), a piston (4), an air inlet (1) and an exhaust port (5); and the piston (4) moves in the cylinder (3), so that the air is input from the air inlet (1), the flowing direction and the pressure of the air in the device are changed, and the air is finally output through the exhaust port (5). The device is characterized in that: the cylinder (3) is a master-slave type cylinder, and a master cylinder cavity (31) and a slave cylinder cavity (32) are formed in the cylinder (3); a cylinder valve (33) is arranged between the master cylinder cavity (31) and the slave cylinder cavity (32) to control the flow of the air in the two cavities; an air valve (2) is arranged in the passage of the master cylinder cavity (31) and the air inlet (1), an air passage (22) communicated with the master cylinder cavity (31) is formed in the air valve (2), and the air pressure difference between the master cylinder cavity (31) and the slave cylinder cavity (32) is changed through the air entering through the air passage (22); and the piston (4) is a linkage piston and provided with a master cylinder piston (41) and a slave cylinder piston (42) matched with the master-slave type cylinder (3) respectively.

Description

technical field [0001] The invention relates to the field of air flow control, and in particular proposes a siphon air flow control device which can be used for dust removal and vacuum / compressed gas generation. Background technique [0002] At present, the common dust collection method is to drive the fan to rotate through the motor to form airflow and suction, and then suck the dust away through the airflow and suction. [0003] In the PCB production process, the surface dust removal process is involved. The common method is: after the inner layer etching process and before the browning process in the multi-layer PCB circuit board production process, the quality of the circuit board needs to be checked by an automatic optical inspection machine. In order to ensure the quality of inspection, before the PCB board enters the automatic optical inspection machine, it is necessary to use an electrostatic sticky dust reel to collect dust, and then use sticky dust paper to clean t...

AI Technical Summary

Problems solved by technology

[0003] In the PCB production process, the surface dust removal process is involved. The common method is: after the inner layer etching process and before the browning process in the multi-layer PCB circuit board production process, the quality of the circuit board needs to be checked by an automatic optical inspection machine. In order to ensure the quality of the inspection, before the PCB board enters the automatic optical inspection machine, it is necessary to use the electrostatic dust reel to collect the dust, and then use the sticky paper to clean the dust on the electrostatic dust reel. This traditional cleaning method leads to low production efficiency. And produce a large amount of sticky paper consumption, seriously increase the production cost

In the traditional cleaning method, one piece of sticky paper is consumed every 10 times of board cleaning, and each automatic optical inspection machine needs to inspect 3,000 PCB boards every day, which means that 300 pieces of sticky paper are consumed every day

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