公开(公告)号：JPH0828481A

公开(公告)日：1996-01-30

申请号：JP19091494

申请日：1994-07-21

Applicant: ZEXEL CORP

Inventor： KUMAGAI SHUZO ,  FUKUDA SHOICHI ,  SHIMADA SHOJI

IPC: F04C28/10 ,  F04C29/10

Abstract: PURPOSE:To enable intake pressure to be always held to the approximately constant value by eliminating generation of catching phenomenon in the transitional state where the number of revolution is suddenly dropped. CONSTITUTION:A variable displacement-type vane compressor is provided with an annular piston 54 for pressing a rotary plate 20 to a cylinder 1 side after receiving back pressure Pa, a piston 32 for rotating the rotary plate 20 according to the change of control pressure Pc in a control pressure chamber 40, a high pressure chamber 43 communicated with the control pressure chamber through a Pc supplying hole 48, and into which intake pressure Pd is to be introduced, a pressure adjusting valve mechanism 70 for changing the control pressure Pc according to intake pressure Ps, and a back pressure chamber 60 communicated with the high pressure chamber 43 through a Pa supplying hole 5g, and the passage diameter of the Pa supplying hole 5g is formed smaller than the passage diameter of the Pc, supplying hole 48. Thereby, the back pressure Pa made lower than the control pressure Pc, cylinder 1 is decreased.