Capacity control valve and method for controlling same

A capacity control valve for controlling a flow rate or pressure of a variable capacity compressor according to a valve opening of a valve section, the capacity control valve comprising:

• a valve main body having a first communication passage through which a fluid at a first pressure passes, a second communication passage which is arranged adjacent to the first communication passage and through which a fluid at a second pressure passes, a third communication passage through which a fluid at a third pressure passes, and a main valve seat arranged in a valve hole for communicating the second communication passage and the third communication passage;
• a pressure-sensitive body which is arranged in the valve main body on the third communication passage side and which extends and contracts in response to ambient pressure;
• a valve body having an intermediate communication passage for communicating the first communication passage and the third communication passage, a main valve part for opening and closing the valve hole by separating from and contacting the main valve seat, and an auxiliary valve part arranged in the intermediate communication passage;
• and
• a solenoid including a first plunger having a first rod, and a second plunger having a second rod, wherein
• the intermediate communication passage is formed in the valve body, and
• a shutoff valve for opening and closing between the first communication passage and the intermediate communication passage is arranged on the solenoid side in the intermediate communication passage, and
• the auxiliary valve part is arranged between the valve body and the pressure-sensitive body in the intermediate communication passage, and that
• the first rod opens and closes the main valve part and the second rod opens and closes the auxiliary valve part.