Patent ID: 6302668
Filing Date: 2001-10-16
Classification: F04C

Abstract:
An improved capacity regulating apparatus for compressors, comprising:a cylinder disposed in the compressor, having a piston and a flexible member disposed in the cylinder;a sliding member coupled to the piston, wherein two opposite guide slots being provided in two opposite sides of the sliding member, two passages being provided inside the sliding member and being in communication with each of the two guide slots, one end of the passages extending through a bottom wall of the sliding member;a pair of rotors abutting to and below the sliding member;a rod extending through and coupled with the piston and the sliding member; andwherein the sliding member being allowed to move axially along a portion of the rod and hence being able to move smoothly in the motion barrel of the compressor, minimizing the effects of misalignments of the sliding member, the piston, the rod, and, during a capacity regulating apparatus, a pressure cushion formed by the high pressure flow coming from the cylinder to the two passages then to the guide slots enabling the sliding member to suspend above the rotors and in the motion barrel, thereby maintaining the siding member to move in the central portion of the motion barrel and reducing the undesirable friction between the sliding member and the two rotors.