Modulated Compressor And Valve Assembly

A compressor comprising:

• a shell assembly defining a suction-pressure region;
• a first scroll disposed within the shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from the first end plate;
• a second scroll disposed within the shell assembly and including a second end plate having a second spiral wrap extending therefrom, the first and second spiral wraps meshingly engaged and forming a series of pockets, the modulation port in communication with a first one of the pockets, the biasing passage in communication with a second one of the pockets;
• a floating seal assembly engaged with the first scroll and isolating the suction-pressure region from discharge-pressure working fluid;
• a modulation-valve ring engaging the first scroll and cooperating 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 being axially displaceable between a closed position and an open position, the modulation-valve ring abutting the first end plate and closing the modulation port when in the closed position, the modulation-valve ring being spaced apart from the first end plate to open the modulation port when in the open position;
• and
• a modulation-control-valve assembly mounted to the modulation-valve ring and movable between a first position corresponding to the closed position and a second position corresponding to the open position,
• wherein the modulation-valve ring includes a first passage, a second passage, and a third passage,
• wherein the second passage is in fluid communication with the axial-biasing chamber,
• wherein the third passage is in fluid communication with a modulation-control chamber defined by the modulation-valve ring,
• wherein the first passage provides fluid communication between the second and third passages when the modulation-control-valve assembly is in the second position,
• wherein the modulation-control-valve assembly includes a valve body, a valve member, and a plug body,
• wherein the valve body and the plug body are fixed relative to the modulation-valve ring,
• wherein the valve member is partially disposed within the valve body and movable therein between the first and second positions,
• wherein a first portion of the valve member extends through the plug body and into the first passage, and
• wherein, the plug body is partially disposed within the valve body and extends out of the valve body and into the first passage.

A compressor comprising:

• a shell assembly defining a suction-pressure region;
• a first scroll disposed within the shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from the first end plate;
• a second scroll disposed within the shell assembly and including a second end plate having a second spiral wrap extending therefrom, the first and second spiral wraps meshingly engaged and forming a series of pockets, the modulation port in communication with a first one of the pockets, the biasing passage in communication with a second one of the pockets;
• a floating seal assembly engaged with the first scroll and isolating the suction-pressure region from discharge-pressure working fluid;
• a modulation-valve ring engaging the first scroll and cooperating 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 being axially displaceable between a closed position and an open position, the modulation-valve ring abutting the first end plate and closing the modulation port when in the closed position, the modulation-valve ring being spaced apart from the first end plate to open the modulation port when in the open position, the modulation-valve ring defining a modulation-control chamber;
• and
• a modulation-control-valve assembly mounted to the modulation-valve ring and movable between a first position corresponding to the closed position and a second position corresponding to the open position,
• wherein when the modulation-control-valve assembly is in the second position, fluid flows from the axial-biasing chamber to the modulation-control chamber without flowing through the modulation-control-valve assembly,
• wherein the modulation-control-valve assembly includes a valve body, a valve member, and a plug body,
• wherein the valve body and the plug body are fixed relative to the modulation-valve ring,
• wherein the valve member is partially disposed within the valve body and movable therein between the first and second positions,
• wherein a first portion of the valve member extends through the plug body and into the first passage, and
• wherein the plug body is partially disposed within the valve body and extends out of the valve body and into a first passage formed in the modulation-valve ring.