Double-cavity sliding vane type compressor cylinder

The utility model discloses a double-cavity sliding vane type compressor cylinder, which is characterized in that a cylinder profile on the cylinder is formed by a quadratic spiral line and comprisesa first suction section curve, a first discharge section curve, a second suction section curve and a second discharge section curve, and the curves are completely and smoothly connected, the first-order derivative is continuous and smooth, and the second-order derivative is continuous; the size of the central angle corresponding to the first suction section curve is alpha, the size of the centralangle corresponding to the first discharge section curve is beta, alpha is smaller than beta, and alpha + beta is equal to 180 degrees. Two asymmetric working cavities are formed between the air cylinder and the rotor, the situation that the working cavities are symmetric about the axis of a rotation center through the center line of the rotation center does not exist, the exhaust volume is reduced, the exhaust pressure is