PASSAGE DEVICE, REFRIGERATING CYCLE DEVICE, PRESSURE PULSATION REDUCING DEVICE AND PRESSURE PULSATION REDUCING METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem wherein in order to reduce the pressure pulsation of a fluid, it is necessary to take a large space for expansion of a fluid, and further a pressure loss is increased. SOLUTION: This pressure pulsation reducing device includes: a passage where pressure pulsation is propagated; an inner pipe disposed in the passage so that the most of a fluid flowing through the interior of the passage flows in the periphery; and a small holes provided in the inner pipe to spout a jet to the passage by a pressure difference between the inside of the inner pipe and the outside thereof, wherein a jet is spouted from the inner pipe through the small holes to a contraction flow part provided in the outer periphery to reduce pressure pulsation of the contraction flow part. COPYRIGHT: (C)2008,JPO&INPIT