Capacity varying type rotary compressor

A capacity varying rotary compressor, comprising:

• a casing that maintains a discharge pressure state;
• a motor installed in the casing and generating a driving force;
• and
• at least one cylinder assembly that includes:
• a rolling piston;
• a vane, wherein the rolling piston is eccentrically coupled to a rotation shaft of the motor such that the rolling piston performs an orbiting motion and the vane performs a linear motion relative to the tolling piston;
• a vane restricting device that restricts a position of the vane so as to separate the vane from the rolling piston, or so as to release the vane so that the vane contacts the rolling piston;
• a vane chamber formed at a rear side of the vane, wherein the vane restricting device restricts or releases the vane based on a pressure differential applied to the vane in the vane chamber and wherein a suction pressure is supplied to the vane chamber so as to separate the vane from the rolling piston, and wherein the discharge pressure is applied to at least one of a forward lateral surface or a rear lateral surface of the vane.

A capacity varying rotary compressor, comprising:

• a casing that maintains a discharge pressure state;
• a motor installed in the casing and generating a driving force;
• and
• at least one cylinder assembly that includes:
• a rolling piston;
• a vane, wherein the rolling piston is eccentrically coupled to a rotation shaft of the motor such that the rolling piston performs an orbiting motion and the vane performs a linear motion relative to the rolling piston;
• a vane restricting device that restricts a position of the vane so as to separate the vane from the rolling piston, or so as to release the vane so that the vane contacts the rolling piston, wherein:
• the vane restricting device restricts or releases the vane based on a pressure differential applied to the vane in a vane chamber,
• a rear lateral surface of the vane connected to an inner space of the casing such that the vane is supported by a discharge pressure, and
• a low pressure is supplied to at least one of two opposite lateral side surfaces of the vane, or to at least one of an upper end surface or a lower end surface of the vane so as to restrict a position of the vane.

A capacity varying rotary compressor, comprising:

• a casing that maintains a discharge pressure state;
• a motor installed in the casing and generating a driving force;
• and
• at least one cylinder assembly that includes:
• a rolling piston;
• a vane, wherein the rolling piston is eccentrically coupled to a rotation shaft of the motor such that the rolling piston performs an orbiting motion and the vane performs a linear motion relative to the rolling piston;
• a vane restricting device that restricts a position of the vane so as to separate the vane from the rolling piston, or so as to release the vane so that the vane contacts the rolling piston, wherein the vane restricting device restricts or releases the vane based on a pressure differential applied to the vane;
• a vane chamber formed at a rear side of the vane, wherein:
• a suction pressure is supplied to the vane chamber so as to separate the vane from the rolling piston,
• a vane pressure chamber of the at least one cylinder assembly that performs a saving driving operation has the same pressure as a suction pressure of a cylinder assembly of the plurality of cylinder assemblies that performs a normal driving operation, and
• a high discharge pressure is supplied to at least one of two opposite lateral side surfaces of the vane, or to a lower end surface of the vane, so as to restrict a position of the vane.

A capacity varying rotary compressor, comprising:

• a casing that maintains a discharge pressure state;
• a motor installed in the casing and generating a driving force;
• and
• at least one cylinder assembly that includes:
• a rolling piston;
• a vane, wherein the rolling piston is eccentrically coupled to a rotation shaft of the motor such that the rolling piston performs an orbiting motion and the vane performs a linear motion relative to the rolling piston;
• and
• a vane restricting device that restricts a position of the vane so as to separate the vane from the rolling piston, or so as to release the vane so that the vane contacts the rolling piston, wherein the vane restricting device restricts or releases the vane based on a pressure differential applied to the vane in a vane chamber,
• wherein a rear lateral surface of the vane contacts and inner surface of the casing such that the vane is supported by a discharge pressure, and
• wherein one of a suction pressure or a discharge pressure is supplied to an inlet of the at least one cylinder assembly, and the other of the suction pressure or the discharge pressure is supplied to opposite lateral side surfaces of the vane, or upper and lower end surfaces of the vane so as to hold or release the vane.