Patent Number: 
Section: claims

1. An accumulator provided with a flow damper inside, the flow damper including a cylindrical vortex chamber, a small flow pipe connected to a peripheral portion of the vortex chamber along a tangential direction thereto, a large flow pipe connected to the peripheral portion while forming a predetermined angle with this small flow pipe, and an outlet pipe connected to an outlet formed at a central part of the vortex chamber, whereinthe flow damper comprises a colliding jet controller for controlling a colliding jet composed of a jet from the large flow pipe and a jet from the small flow pipe flowing into the vortex chamber at the time of a large flow injection so that the colliding jet may proceed directly to the outlet without forming a vortex in the vortex chamber, the colliding jet controller is a bevel formed at a junction of the small flow pipe and the vortex chamber, andsaid bevel is formed in a predetermined shape having a predetermined surface, in which said predetermined surface extends from an inner surface, which is located at the opposite side of the large flow pipe, of the small flow pipe to an inner peripheral surface of the vortex chamber. 2. The accumulator according to claim 1, whereinthe bevel formed at the junction being in an oblique direction relative to the direction of the jet from the small flow pipe. 3. The accumulator according to claim 1, whereinthe bevel formed at the junction being bent.