Abstract: A compressor may include a scroll and a discharge valve assembly. The scroll may include an end plate and a spiral wrap extending from the end plate. The end plate may include a discharge passage. The discharge valve assembly may be mounted to the scroll and may be configured to control fluid flow through the discharge passage within the discharge passage. The discharge valve assembly may include a base and a valve member. The base may be fixed relative to the end and may include a discharge opening in communication with the discharge passage. The valve member may be mounted to the base. The valve member may be deflectable relative to the base between a closed position and an open position. The discharge opening may include at least one radially extending lobe.

Abstract: A compressor may include a shell assembly, first and second scrolls, a floating seal assembly, a modulation-valve ring, and a modulation-control-valve assembly. The shell assembly may define a suction-pressure region. The first scroll may include a discharge passage, a modulation port, and a biasing passage. The modulation-valve ring may cooperate with the floating seal assembly and the first scroll to define an axial-biasing chamber in fluid communication with the biasing passage. The modulation-valve ring may be axially displaceable between a closed position to close the modulation port and an open position to open the modulation port. The modulation-control-valve assembly may be mounted to the modulation-valve ring and may be movable between a first position corresponding to the closed position and a second position corresponding to the open position.