公开(公告)号：JPH09105400A

公开(公告)日：1997-04-22

申请号：JP21484496

申请日：1996-08-14

Applicant: BIO RAD LABORATORIES

Inventor： JIYON EICHI KIYURITEI ,  KIISU KASUTE

IPC: F04F5/02 ,  F04B23/12 ,  F04B23/14 ,  F04F5/54

Abstract: PROBLEM TO BE SOLVED: To realize an aspirator system that can maintain high negative pressure even under continuous operation for many hours. SOLUTION: In a circulating type aspirator system, aspirators 17, 18 and a pump 16 for feeding water to the aspirators are arranged on the outside of a water tank 11, and the aspirators 17, 18 and pump 16 are connected to the water tank by piping. A cooling circuit 32 formed of a pump 31 and a condenser 33 so as to cool and return water from the tank 11 is provided on the outside of the tank 11. With this layout, the temperature of water circulated in the aspirator system is lowered to improve the efficiency of the aspirators.