Scroll-type compressor

A scroll-type compressor comprising:

• a rotation shaft rotating by receiving a drive force from a rotational drive source;
• a movable scroll revolving by a rotational drive force transmitted from the rotation shaft, the movable scroll including a movable substrate portion having a flat-plate shape, a low-stage movable tooth portion having a spiral shape and protruding from the movable substrate portion to a first side in an axial direction of the rotation shaft, and a high-stage movable tooth portion having a spiral shape and protruding from the movable substrate portion to a second side in the axial direction of the rotation shaft;
• a low-stage fixed scroll including a low-stage substrate portion having a flat-plate shape, and a low-stage fixed tooth portion having a spiral shape, protruding from the low-stage substrate portion in the axial direction of the rotation shaft and engaging with the low-stage movable tooth portion;
• a high-stage fixed scroll including a high-stage substrate portion having a flat-plate shape, and a high-stage fixed tooth portion having a spiral shape, protruding from the high-stage substrate portion in the axial direction of the rotation shaft and engaging with the high-stage movable tooth portion;
• a low-stage compression chamber that is a space provided between the low-stage movable tooth portion and the low-stage fixed tooth portion, the low-stage compression chamber changing in volume in accordance with revolution of the movable scroll to pressurize a fluid sucked from an outside;
• and
• a high-stage compression chamber that is a space provided between the high-stage movable tooth portion and the high-stage fixed tooth portion, the high-stage compression chamber changing in volume in accordance with revolution of the movable scroll to pressurize the fluid pressurized in the low-stage compression chamber, wherein
• the rotation shaft extends through the movable substrate portion, and
• at least one of the low-stage compression chamber and the high-stage compression chamber has a single space communicating with a discharge hole when communicating with the discharge hole through which a fluid is discharged from an inside of each compression chamber.