Vacuum producing device

Abstract

A vacuum producing device having at least one ejector unit and a pressure monitoring unit. Since the ejector unit and the pressure monitoring unit are arranged in a common device housing dimensions are extremely compact

1 . A vacuum producing device comprising at least one ejector unit, which comprises a nozzle connected with a supply connection, a receiving nozzle placed downstream from the nozzle and an aspiration zone defined in the transition region between the nozzle and the receiving nozzle and connected by way of an aspiration duct with an aspiration connection and furthermore a pressure monitoring unit, which has a pressure sensor connected with the aspiration duct, wherein the ejector unit and the pressure monitoring unit are provided in a common device housing.  
     
     
         2 . The vacuum producing device as set forth in  claim 1 , wherein the pressure monitoring unit is arranged in a sensor accommodating chamber shut off by a housing cover.  
     
     
         3 . The vacuum producing device as set forth in  claim 2 , wherein the housing cover is able to be removed for gaining access to the sensor accommodating chamber.  
     
     
         4 . The vacuum producing device as set forth in  claim 2 , comprising attachment means for detachable holding in place of the pressure monitoring unit in the sensor accommodating chamber when the housing cover is taken off.  
     
     
         5 . The vacuum producing device as set forth in  claim 1 , wherein the ejector unit and the pressure monitoring unit are arranged separately in an ejector accommodating chamber of the device housing.  
     
     
         6 . The vacuum producing device as set forth in  claim 1 , wherein the pressure monitoring unit is provided with an electromechanical interface accessible from the outside and rendering possible the connection of an external means.  
     
     
         7 . The vacuum producing device as set forth in  claim 6 , wherein the electromechanical interface of the pressure monitoring unit and the supply connection of the ejector unit are provided on a common outer side of the device housing and are orientated in the same direction.  
     
     
         8 . The vacuum producing device as set forth in  claim 1 , wherein the device housing has a principal axis and the ejector unit and the pressure monitoring unit each have an elongated shape and with respect to the direction of the principal axis are placed at the same level in a manner parallel to one another.  
     
     
         9 . The vacuum producing device as set forth in  claim 1 , comprising display means on the outer side of the device housing for the display of at least one operational state.  
     
     
         10 . The vacuum producing device as set forth in  claim 1 , wherein tapping of pressure for the pressure sensor is arranged to take place in an ejector accommodating chamber containing the ejector unit.  
     
     
         11 . The vacuum producing device as set forth in  claim 1 , wherein the pressure monitoring unit comprises a circuit board bearing a pressure sensor and evaluating electronic circuitry.  
     
     
         12 . The vacuum producing device as set forth in  claim 11 , wherein the evaluating electronic circuitry comprises a micro-controller.  
     
     
         13 . The vacuum producing device as set forth in  claim 12 , comprising externally accessible actuating means for changing the settings of the micro-controller.  
     
     
         14 . The vacuum producing device as set forth in  claim 13 , wherein the actuate means comprise at least one key extending through the wall of the device housing.