Patent ID: 9188125
Filing Date: 2015-11-17
Classification: F04C

Abstract:
1. A scroll fluid machine comprising: a cylindrical casing with an opening at either least at one of a first axial end thereof and a second axial end thereof opposite the first axial end; a fixed scroll provided at the opening on the first axial end of the casing, with a fixed wrap extending toward the casing; an orbiting scroll provided in the casing and having an orbiting wrap with a compression chamber formed between the fixed wrap of the fixed scroll and the orbiting wrap; a rotating shaft with one end engaging with the orbiting scroll to allow the orbiting scroll to perform an orbiting motion, and another end protruding from the opening of the second axial end of the casing; and a discharging centrifugal fan provided on the other end of the rotating shaft, the scroll fluid machine including: a fixed cooling passage provided on a rear of the fixed scroll, with a fixed inlet opened to an environment external to the casing of the scroll fluid machine on one radial side of the fixed scroll and a fixed outlet on another radial side of the fixed scroll; an orbiting cooling passage provided on a rear of the orbiting scroll, with an orbiting inlet opened to the environment external to the casing of the scroll fluid machine on the one radial side of the casing and an orbiting outlet on the another radial side of the casing; and a cooling air passage having a side duct communicating with the fixed outlet and the orbiting outlet located on one side surface of the casing, and a guide duct communicating with the side duct and connected to a fan cover disposed outside the centrifugal fan, the guide duct further surrounding an outer periphery of the second axial end of the casing.