Patent ID: 7077380
Filing Date: 2006-07-18
Classification: F04B

Abstract:
1. A capacity control valve comprising: a valve unit to be inserted in a flow path of a working fluid, said valve unit including a valve passage for connecting an upstream-side portion and a downstream-side portion of the flow path and a valve member for opening/closing said valve passage; and a drive unit connected with said valve unit and driving said valve member, said drive unit including: a nonmagnetic core guide extending in a driving direction of said valve member, a movable core slidably disposed in said core guide, said movable core partitioning the inside of said core guide into a first chamber in an airtight state and a second chamber at both sides of said movable core in view of an axial direction thereof, respectively, the second chamber being located at the side of said valve unit, a solenoid assembly for generating an electromagnetic force to move said movable core in a closing direction of said valve member, a transmission member for mechanically transmitting the movement of said movable core to said valve member, and a communicating path formed in at least one of said movable core and said core guide, and making said first and second chambers communicate with each other, wherein said movable core has a sliding peripheral portion that is formed in a part of said movable core in view of the axial direction thereof and slides on an inner peripheral surface of said core guide, and a residual peripheral portion in a non-contact state with respect to the inner peripheral surface of said core guide, and said communication path comprises an annular space formed between the residual peripheral portion and an inner peripheral surface of said core guide.