Patent ID: 9127800
Filing Date: 2015-09-08
Classification: B60H,F16L

Abstract:
1. A Duct for fluid under pressure of gas or supercritical type for an air-conditioning circuit of a motor vehicle or a building, the duct comprising: a conduit (including a tubular male end fitting of nominal inside diameter D0 and a tubular female end fitting that is connected in fluid-tight manner to the male end fitting in an enlarged axial portion of the female end fitting or in the immediate vicinity of an enlarged axial portion of the male end fitting, this male or female end fitting enlarged portion having a maximum inside diameter D2 and the female end fitting having a nominal inside diameter D0′ identical to D0 or not, and a globally tubular noise-reducing device that is mounted axially and radially inside the male end fitting and defines, between an axially internal end and an axially external end of this device relative to the male end fitting at least one fluid flow channel in the direction of the axis (X) of the conduit, the external end of the device being mounted in fluid-tight manner against a terminal edge of the male end fitting in line with the female end fitting, wherein said enlarged portion of the male or female end fitting has, starting from said axially internal or external end of the device situated in line with this enlarged portion, a length L2 such that: L2≧0.6D, where D designates their common value if D0 and D0′ are equal or whichever is the lower of the values D0 and D0′ if they are not equal.