Rotary compressor

A rotary compressor comprising:

• a cylinder which defines a cylinder chamber;
• a piston disposed within said cylinder chamber;
• and
• a drive mechanism for driving said piston,
• said piston having a roller which performs a revolving motion within said cylinder chamber and a vane which, together with said roller, partitions the interior of said cylinder chamber into a suction chamber and a compression chamber,
• further comprising,
• a small space provided so as to communicate with said compression chamber in a predetermined section exclusive of a rotational angle of said roller corresponding to a minimum projection quantity of said vane into said cylinder chamber.

A rotary compressor comprising:

• a cylinder which defines a cylinder chamber;
• a piston disposed within said cylinder chamber;
• and
• a drive mechanism for driving said piston,
• said piston having a roller which performs a revolving motion within said cylinder chamber and a vane, which together with said roller, partitions the interior of said cylinder chamber into a suction chamber and a compression chamber, said roller and said vane being formed integrally with each other,
• wherein a swing bush which supports said vane so as to absorb advance and retreat motions and swing motion of the vane is provided in said cylinder, and a plurality of small spaces adapted to communicate with said compression chamber are provided so as to communicate with the compression chamber in a plurality of predetermined sections.

A compressor communicated with a refrigerating cycle, comprising:

• a closed vessel,
• at least one rotary cylinder provided in the closed vessel and forming a cylinder chamber therein, the rotary cylinder having a rotor revolving in the cylinder chamber, a vane advanced and retreated inward from the cylinder, the cylinder chamber having a suction recess passing through refrigerant from the refrigerating cycle and a discharge recess passing through compressed refrigerant,
• a small space provided adjacent to the discharge recess, and
• a communication passage connecting the small space with the cylinder chamber during a portion of the revolution of the rotor in the cylinder chamber, and disconnecting the small space from the cylinder chamber when the discharge recess and the suction recess are in communication.

A rotary compressor comprising:

• a cylinder which defines a cylinder chamber;
• a piston disposed within said cylinder chamber;
• and
• a drive mechanism for driving said piston,
• said piston having a roller which performs a revolving motion within said cylinder chamber and a vane which, together with said roller, partitions the interior of said cylinder chamber into a suction chamber and a compression chamber,
• wherein said roller and said vane are formed integrally with each other, and said vane is supported by a swing bush so that it can swing, advance and retreat,
• further comprising,
• a small space provided to communicate with said compression chamber in a predetermined section without coming, into communication with said suction chamber.

A compressor communicated with a refrigerating cycle, comprising:

• a closed vessel,
• at least one rotary cylinder provided in the closed vessel and forming a cylinder chamber therein, the rotary cylinder having a rotor revolving in the cylinder chamber, a vane advanced and retreated inward from the cylinder, the cylinder chamber having a suction recess passing through refrigerant from the refrigerating cycle and a discharge recess passing through compressed refrigerant,
• a small space provided adjacent to the discharge recess, and
• means for connecting the small space with the cylinder chamber during a portion of the revolution of the rotor in the cylinder chamber, and disconnecting the small space from the cylinder chamber when the discharge recess and the suction recess are in communication.