| 摘要 |
PURPOSE:To prevent an air filter of a compressor from choking by introducing the excess air discharged from an air shock-absorber into the air filter reversely against the suction of the open air for discharging to the atmosphere through the air filter. CONSTITUTION:An open air port 16d is connected to the middle between an air filter 18 of a compressor 10b and a suction valve through a return circuit 17. Consequently, the excess air discharged from an air shock-absorber is discharged to the atmosphere through the return circuit 17 and the air filter 18. Besides, a circuit pressure control valve 20 is arranged in the return circuit 17 to guarantee the minimum air pressure necessary for a system. This construction serves to scatter dust and other impurities attached to the air filter 18 for preventing choking. |
