To suppress flow speed raising of an intake stroke to reduce pressure loss of the intake stroke, and improve a performance and a reliability by forming a cylinder and a flat shape of a displacer so as to maximize a capacity of an operation space in a condition sealed on only inflection point of a curve.
An inner circumferential shape of a cylinder for composing a displacement type compressor is formed so as to appear a hollow part in a same shape every 120°, and a plurality of circular cone shaped vanes 4 protruded inward are formed on an end part of each hollow part. In a displacer 5 disposed in a cylinder 4, each center O, O' is formed sliding for a predetermined rate so as to engage the vane 4b with an inner circumferential wall 4a whose curvature is larger than that of the vane 4b. When a driving shaft 6 is rotated, the displacer 5 is revolved without self-rotating, a plurality of operating chambers 9 are sectioned around a center O of the displacer 5, operating gas is sucked from an intake port 7a, and compressed. And then, it is delivered from a delivery port 8a.
KOSOKABE HIROKATSU
TAKEBAYASHI MASAHIRO
OSHIMA KENICHI
