| 摘要 |
The present invention relates to an ejection unit having a supply nozzle (1) for blasting a working medium, preferably gas, in the form of a hollow needle, and a discharge nozzle (2) of a mixture of the working medium and vapors of a concentrated material volatile fraction, also performed as a hollow needle, wherein both said supply nozzle (1) and the discharge nozzle (2) are fixed in a piston (3) arranged slidably within a cylinder (4) being closed at its one end by a bottom (5) and being open at it other end. In the bottom (5), there is a bore hole (8) for passage of the discharge nozzle (2) out of the cylinder (4). In the working space of the cylinder (4) extending between the bottom (5) and the piston (3), there is an inlet (6) of a pressure working medium, whereby the piston (3) is supported on the side turned away from the bottom (5) by a return spring (7) having its other end leant on the cylinder (4) jacket. The proposed ejection unit is characterized in that the pressure working medium does not only serve for flushing the concentrated material vapors but also for controlling working cycles of both supply (1) and discharge (2) nozzles. |
