Scroll compressor having a capacity variable device

A scroll compressor, comprising:

• a casing with an inner space, the inner space having a low pressure portion and a high pressure portion;
• a first scroll provided in the inner space, the first scroll being configured to perform an orbiting motion;
• a second scroll that forms a compression chamber with the first scroll, the compression chamber being configured to compress a refrigerant disposed therein;
• a back pressure chamber assembly fixed to the second scroll to form a back pressure chamber;
• a bypass passage to bypass at least a portion of the refrigerant compressed in the compression chamber to the low pressure portion of the casing;
• and
• a valve assembly comprising:
• a first valve assembly to selectively open and close the bypass passage,
• a second valve assembly to generate a pressure difference in the first valve assembly to control the opening/closing of the first valve assembly,
• a valve member that is slideable in a valve receiving portion to open and close the bypass passage,
• a seal member disposed between the valve receiving portion and the outer peripheral surface of the valve member, and
• a seal receiving groove that receives the seal member,
• whereby a distance between the seal receiving groove and a sealing surface with which the seal member is in slideable contact with is variable along the moving direction of the valve member.

A scroll compressor, comprising:

• a casing with an inner space, the inner space having a low pressure portion and a high pressure portion;
• a first scroll provided in the inner space, the first scroll being configured to perform an orbiting motion;
• a second scroll that forms a compression chamber with the first scroll, the compression chamber being configured to compress a refrigerant disposed therein;
• a back pressure chamber assembly fixed to the second scroll to form a back pressure chamber;
• a bypass passage to bypass at least a portion of the refrigerant compressed in the compression chamber to the low pressure portion of the casing;
• and
• a valve assembly comprising:
• a first valve assembly to selectively open and close the bypass passage;
• and
• a second valve assembly to generate a pressure difference in the first valve assembly to control the opening/closing operation of the first valve assembly,
• a valve member that is slideable in the valve receiving portion to open and close the bypass passage,
• a seal member provided on either a valve receiving portion or the valve member to seal a gap between the valve receiving portion and the valve member, and
• an inclined surface provided on either the valve receiving portion or the valve member,
• whereby the minimum diameter of the inclined surface is less than or equal to the inner diameter or the outer diameter of the seal member corresponding to the inclined surface, and the maximum diameter of the inclined surface is greater than the inner diameter or the outer diameter of the seal member corresponding to the inclined surface.