Scroll compressor

A scroll compressor comprising:

• a casing;
• a motor to generate a driving force in the casing;
• a rotary shaft rotated by the motor;
• an orbiting scroll orbiting around the rotary shaft;
• a fixed scroll defining a compression chamber together with the orbiting scroll;
• a first bearing rotatably supporting the rotary shaft relative to the casing at one side of the rotary shaft with respect to the motor;
• a second bearing rotatably supporting the rotary shaft relative to the casing at the other side of the rotary shaft with respect to the motor;
• and
• a third bearing rotatably supporting the rotary shaft relative to the orbiting scroll at an opposite side of the first bearing with respect to the second bearing, wherein:
• assuming that the center of the first bearing is a first bearing center, the center of the second bearing is a second bearing center, the center of the third bearing is a third bearing center, and the center of a rotor of the motor is a motor center, in an extension direction of the rotary shaft,
• a distance between the first bearing center and the third bearing center is a predetermined distance;
• a distance between the motor center and the third bearing center is longer than a distance between the motor center and the first bearing center;
• and
• a distance between the second bearing center and the motor center is longer than a distance between the second bearing center and the third bearing center.

A scroll compressor comprising:

• a casing;
• a motor to generate a driving force in the casing;
• a rotary shaft rotated by the motor;
• an orbiting scroll orbiting around the rotary shaft;
• a fixed scroll defining a compression chamber together with the orbiting scroll;
• a first bearing rotatably supporting the rotary shaft relative to the casing at one side of the rotary shaft with respect to the motor;
• a second bearing rotatably supporting the rotary shaft relative to the casing at the other side of the rotary shaft with respect to the motor;
• and
• a third bearing rotatably supporting the rotary shaft relative to the orbiting scroll at an opposite side of the first bearing with respect to the second bearing,
• wherein assuming that the center of the first bearing is a first bearing center, the center of the second bearing is a second bearing center, and the center of the third bearing is a third bearing center, in an extension direction of the rotary shaft, a distance between the second bearing center and the third bearing center is shorter than a distance between the second bearing center and the first bearing center.

A scroll compressor comprising:

• a casing;
• a motor to generate a driving force in the casing;
• a rotary shaft rotated by the motor;
• an orbiting scroll orbiting around the rotary shaft;
• a fixed scroll defining a compression chamber together with the orbiting scroll;
• and
• a second bearing rotatably supporting the rotary shaft between the motor and the compression chamber, wherein:
• the rotary shaft comprises an eccentric bush rotating at an overlapped position with the second bearing in an axial direction of the rotary shaft;
• and
• the second bearing is adjacent as close as possible to the compression chamber within a range in which it does not interfere with the eccentric bush).

A scroll compressor comprising:

• a casing;
• a motor to generate a driving force in the casing;
• a rotary shaft rotated by the motor;
• an orbiting scroll orbiting around the rotary shaft;
• and
• a fixed scroll defining a compression chamber together with the orbiting scroll, wherein the casing comprises:
• a first partition wall to separate a space for accommodation of the motor from a space for accommodation of an inverter to control the motor;
• and
• a second partition wall to separate the space for accommodation of the motor from a space for provision of the compression chamber, and wherein:
• the first partition wall is formed with a first support groove into which a first bearing to support one end of the rotary shaft is inserted;
• the second partition wall is formed with a second support groove into which a second bearing to support the other end of the rotary shaft is inserted;
• and
• the second support groove is recessed from a surface of the second partition wall facing the compression chamber.