Scroll compressor

[0001] The invention discloses a kind of screw compressor, the screw compressor includes fixed scroll and pressure release valve block, and the outer face of the fixed scroll is provided with relief hole, and the annular flange set around the relief hole is additionally provided with the outer face of the fixed scroll.The pressure release valve block has head and afterbody, and the afterbody is fixed on the fixed scroll, and the head coordinates with the annular flange to open or close the relief hole.Screw compressor according to embodiments of the present invention, due to being provided around the annular flange of relief hole on the outer face on fixed scroll, when pressure release valve block closes relief hole, the head of pressure release valve block is engaged with annular flange, reduce the contact area of pressure release valve block and relief hole, the impact noise of pressure release valve block and relief hole is reduced, while also reduces drag losses.