Automatic device to regulate the vacuum pressure varying the rotation speed of the vacuum pump electrically powered, through the frequency variation of the power supply

Abstract

An automatic device to regulate and maintain stable the vacuum pressure varying the rotation speed of a vacuum pump. The device controls frequency variation of the current that powers its operation motor. The device may be used in installations of machine oerdeñadoras de animales, fixed and portable and other vacuum operated equipment or installations.

We claim:  
     
         1 . Automatic device to regulate vacuum pressure varying the rotation speed of the vacuum pump powered electrically by the frequency variation of the power supply, wherein it has a chamber connected to the vacuum system by a duct able to detect vacuum pressure variation through a calibrated hole of communication with the said chamber, one part of which is delimitated by a diaphragm subject to the pressure of a spring of regulable and joint tension to an obturator which controls a hole of air inlet to the system according to a regulation predetermined by the spring adjustment, including in operative relation with said chamber, an auxiliary device detector of the pressure variation in the inner of said chamber and provide them as a control electric signal of a frequency converter intercalated in the supply circuit of the Automatic device to regulate vacuum pressure electric motor of pump operation.  
     
     
         2 . Automatic device to regulate vacuum pressure, according to    claim 1   , wherein that said detector device has a second diaphragm incorporated as a part of the said chamber wall and connected exteriorly through a joint arm, rod, or the like, of transmission of it movement to the corresponding regulator of a potentiometer, variable resistance reostat, or the like, intercalado in the control circuit of the frequency converter.  
     
     
         3 . Automatic device to regulate vacuum pressure, according to    claim 1   , wherein that said detector device has a second diaphragm incorporated as a part of the said chamber wall and connected exteriorly to the monitoring of a proximity sensor able to detect diaphragm position changes and generate control electric signal of the frequency converter.  
     
     
         4 . Automatic device to regulate vacuum pressure, according to    claim 1   , wherein that said detector device has a sensor pressure transducer or the like applied on the said chamber, in direct operative relation with the interior of said chamber