Feeding device for the partial vacuum with an ejector

摘要

Feed device for negative pressure with:an air outlet opening (41; 73) with a source of negative pressure;an air inlet opening (40; 72), which is open towards the atmosphere;a vacuum hole (42; 74), which has a negative pressure chamber is connected a venturi pump;a channel (60; 80, 81) for providing a connection between the air outlet opening (41; 73) and the vacuum hole (42; 74);a first non-return valve (61; 95), by means of which air through the channel (60; 80, 81) only in a direction from the vacuum hole (42; 74) to the air outlet opening (41; 73) can flow;an ejector (1; 38; 70) with an air outlet (44; 76), which is connected with the air outlet opening (41; 73) in conjunction with an air inlet (43; 75), which is connected with the air inlet opening (40; 72), and with an under pressure outlet (45; 77), which is connected with the vacuum hole (42; 74) in communication;a second check valve (62; 94), by means of which air..