| 摘要 |
Multi-ejector having at least one set of between two and four nozzles (7-10) arranged in series in order of size in the flow direction, the smallest nozzle (7) constituting the first nozzle. The novel feature of the present multi-ejector resides in the fact that by using the below given connections between the inlet and outlet diameters of the nozzles as well as the distances between adjacent nozzles starting from the inlet diameter (a) of the first nozzle (7) there have been obtained negative pressures amounting to between 7 and 10% of actual air pressure when using a positive pressure of between 3.7 and 6.0 kilopounds per square centimeters. Nozzle Inlet Outlet Distances to Diameter Diameter succeeding nozzles First (7) a 1.5a 0a Second (8) 2.1-2.2a 2.3-2.4a 5a Third (9) 3.6-3.7a 4.0-4.1a 2.5a Fourth (10) 4.5-4.6a 5.6-5.7a |
