Scroll type compressor

A scroll type compressor for compressing gas, the compressor comprising:

• a fixed scroll, wherein the fixed scroll includes a fixed base plate and a fixed volute portion, which is formed on the fixed base plate, wherein the fixed volute portion has a pair of side walls and a proximal end and a distal end relative to the fixed base plate, and wherein the fixed volute portion is tapered and the corners of the proximal end of the fixed volute portion are arched;
• a movable scroll arranged to be engaged with the fixed scroll, wherein the movable scroll includes a movable base plate and a movable volute portion, which is formed on the movable base plate, wherein the movable volute portion has a pair of side walls and a proximal end and a distal end relative to the movable base plate, and wherein the movable volute portion is tapered and the corners of the proximal end of the movable volute portion are arched, wherein, when the fixed scroll and the movable scroll are formed by molding, the fixed volute portion and the movable volute portion are formed by utilizing a draft angle required for the release from a mold, wherein the side walls of the fixed volute portion are inclined by different first inclination angles with respect to the fixed base plate, and the side walls of the movable volute portion are inclined by different second inclination angles with respect to the movable base plate, and wherein one of the side walls of the fixed volute portion is parallel to the facing one of the side walls of the movable volute portion;
• a compression chamber defined between the fixed scroll and the movable scroll, wherein the compression chamber moves from the peripheral portion of the fixed volute portion toward the center as the movable scroll orbits the axis of the fixed scroll;
• and
• a plurality of sealing members, one of which is located on the fixed base plate and the other of which is located on the movable base plate, wherein each sealing member covers the corners of the proximal end of the corresponding one of the fixed volute portion and the movable volute portion.