Patent ID: 6287097
Filing Date: 2001-09-11
Classification: F04C

Abstract:
A scroll compressor comprising:a casing;a fixed scroll provided in said casing and including a fixed scroll end plate and a fixed scroll spiral protrusion built on a first face of said fixed scroll end plate, wherein said fixed scroll is supported in a manner such that said fixed scroll is movable in an axial direction of said casing;a revolving scroll provided in said casing and including a revolving scroll end plate and a revolving scroll spiral protrusion built on a first face of said revolving scroll end plate, wherein said fixed scroll spiral protrusion and said revolving scroll spiral protrusion are engaged with each other so as to form a spiral compression chamber; anda back pressure block fixed on a back face of said fixed scroll end plate and fit to an inner-peripheral face of said casing via a sealing device so that said back pressure block is also movable in said axial direction of said casing, wherein:an introduced working gas is compressed in said spiral compression chamber and then discharged according to a revolving operation of said revolving scroll;a discharge port joining said spiral compression chamber is formed in said fixed scroll end plate;said back pressure block has a ring shape, and all of said inner-peripheral face of said back pressure block, said inner-peripheral face of said casing, and said back face of said fixed scroll form a high-pressure chamber having a suitable volume; anda discharge valve for opening and closing said discharge port is attached to said back face of said fixed scroll end plate and is provided in said high-pressure chamber.