Variable capacity compressor

A variable capacity compressor comprising:

• a compression chamber configured to compress a working fluid;
• an inlet chamber configured to house the working fluid to be compressed in the compression chamber;
• a discharge chamber configured to house the working fluid compressed in the compression chamber and discharged therefrom;
• a control pressure chamber including a drive shaft penetrating therethrough and configured to house a swash plate rotating in accordance with a rotation of the drive shaft;
• a supply passage configured to facilitate communication between the discharge chamber and the control pressure chamber;
• a bleed passage configured to facilitate communication between the control pressure chamber and the inlet chamber;
• a first control valve including a first valve portion configured to adjust an opening degree of the supply passage;
• a second control valve provided on the bleed passage and comprising a spool housing recess formed on the bleed passage,
• wherein a spool housed in the spool housing recess is configured to be movable to open and close the bleed passage;
• a back pressure chamber disposed in between the spool and a bottom of the spool housing recess;
• and
• biasing means configured to bias the spool in an opening direction of the bleed passage, wherein the supply passage is connected to the back pressure chamber on the downstream side of the first valve portion of the first control valve to open and close the bleed passage based on a pressure in the back pressure chamber,
• wherein the first control valve further comprises:
• a low-pressure side passage branched from the supply passage at a point downstream of the first valve portion and communicating with the inlet chamber, and
• a second valve portion configured to adjust an opening degree of the low-pressure side passage,
• wherein the first valve portion and the second valve portion are in an interlocked relationship such that when one of the first and second valve portions closes a corresponding passage, the other of the first and second valve portions opens the corresponding passage, and
• wherein the back pressure chamber is selectively connected to the discharge chamber or the inlet chamber via the first valve portion or the second valve portion of the first control valve.