Vacuum control unit

A vacuum control unit in a device configured to output an operation signal for transfer of an object according to each inner pressure condition of a plurality of vacuum pumps (11) in a vacuum transfer system, the vacuum control unit comprising:

• a module stack (14) in which modules (13) individually corresponding to each vacuum pump (11) are assembled in a close contact manner and a control unit (15) disposed at one side of the stack (14) and being in signal connection with each module (13);
• wherein each module (14) comprises one side sensor unit (17) configured to detect inner pressure of the corresponding vacuum pump (11) and the other side terminal unit (18) connected to an electronic valve (19) configured to open and close a compressed air inlet of the vacuum pump (11);
• wherein the control unit (15) blocks supply of compressed air (A1) to the corresponding vacuum pump (11) by outputting a ‘close’ signal of the electronic valve (19) through the terminal unit (18) when sensed pressure of each sensor unit (17) of the module reaches a set value;
• and
• the vacuum control unit further comprises a break terminal (27) connected to an electronic valve (26) configured to apply direction change of the compressed air (A1);
• and
• wherein the control unit (15) directly supplies compressed air (A2) to a suction pad (12) connected to each vacuum pump (11) by outputting an ‘open’ signal of the electronic valve (26) through the break terminal (27) when the transfer of the object is completed.