FIXED VOLUTE ELEMENT AND VOLUTE FLUID MACHINE

摘要

A fixed volute member and a volute fluidic machine using the fixed volute member, which improve problematic situations by controlling the capacity of a portion of the compression space that includes a discharge port in a central portion of a end plate of the fixed volute element, are offered. A scroll fluidic machine includes a fixed scroll member attached to a housing, a rotary scroll member configured to mesh with the fixed scroll member to rotate around the fixed scroll member to thereby define a space of movable compression, and a discharge port provided in an end plate of the fixed volute member in a position corresponding to a center of the fixed scroll member in the compression space, a recess portion being provided in the vicinity of the discharge port in a central portion of the fixed volute member to increase a capacity of the compression space which corresponds to the center of the fixed volute member.