Rotary compressor

A rotary compressor comprising:

• a sealed vertically-placed cylindrical compressor housing which is provided with a discharge pipe in an upper portion thereof and is provided with an inlet pipe in a lower portion of a side surface thereof,
• a motor which is disposed on an inside of the compressor housing, and
• a compressing unit which is disposed below the motor on the inside of the compressor housing, is driven by the motor, compresses a refrigerant suctioned via the inlet pipe, and discharges the refrigerant from the discharge pipe,
• wherein the compressing unit includes an annular cylinder, an end plate which blocks an end portion of the cylinder, an eccentric portion which is provided in a rotation shaft rotated by the motor, a piston which is fitted to the eccentric portion, revolves along an inner circumferential surface of the cylinder, and forms a cylinder chamber in the cylinder, and a vane which protrudes from a vane groove provided in the cylinder to an inside of the cylinder chamber, abuts against the piston, and divides the cylinder chamber into an inlet chamber and a compression chamber,
• the piston is formed to satisfy the following expressions:
• 0.7×Hcy1/1000≤δro≤1.2×Hcy1/1000,
• Cro1≤0.1,
• Cro2≤0.1, and
• Cro1×Cro2≤0.007,
• by using a cylinder height Hcy1, a piston height clearance width δro, a first piston outer circumferential chamfer length Cro1, and a second piston outer circumferential chamfer length Cro2,
• where the cylinder height Hcy1 indicates a height (mm) of the cylinder chamber in a height direction which is parallel to a rotation axial line about which the rotation shaft rotates,
• the piston height clearance width δro indicates a width (mm) of a clearance between the piston and the end plate in the height direction,
• the first piston outer circumferential chamfer length Cro1 indicates a length (mm) of a piston outer circumferential chamfer portion formed between an outer circumferential surface that slidably comes into contact with the vane in the piston and a piston end surface that opposes the end plate in the piston, in the height direction, and
• the second piston outer circumferential chamfer length Cro2 indicates a length (mm) of the piston outer circumferential chamfer portion in a normal line direction of the outer circumferential surface, and
• the vane is formed to satisfy the following expressions:
• 0.7×Hcy1/1000≤δv≤1.2×Hcy1/1000,
• Cv1≤0.06,
• Cv2≤0.06, and
• Cv1×Cv2≤0.003,
• by using a vane height clearance width δv, a first vane ridge line chamfer length Cv1, and a second vane ridge line chamfer length Cv2,
• where the vane height clearance width δv indicates a width (mm) of a clearance between the vane and the end plate in the height direction,
• the first vane ridge line chamfer length Cv1 indicates a length (mm) of a vane ridge line chamfer portion formed between a tip end surface that slidably comes into contact with the piston in the vane and a vane end surface that opposes the end plate in the vane, in the height direction, and
• the second vane ridge line chamfer length Cv2 indicates a length (mm) of the vane ridge line chamfer portion in a normal line direction of the tip end surface.