Fluid machinery, heat exchange apparatus and operation method for fluid machinery

Fluid machinery, comprising:

• a crankshaft, along an axial direction thereof provided with two eccentric parts, wherein there is a phase difference of a first included angle A between the two eccentric parts;
• a cylinder sleeve, the crankshaft and the cylinder sleeve being eccentrically arranged and having a fixed eccentric distance therebetween;
• a crossed groove structure, rotatably arranged in the cylinder sleeve, the crossed groove structure having two limiting channels, the two limiting channels sequentially being arranged along the axial direction of the crankshaft, and extension directions of the two limiting channels being perpendicular to the axial direction of the crankshaft, wherein there is a phase difference of a second included angle B between the extension directions of the two limiting channels, and the first included angle A is twice of the second included angle B;
• and
• two sliding blocks, provided with through holes, the two eccentric parts correspondingly extending into the two through holes on the two sliding blocks, the two sliding blocks being correspondingly arranged in the two limiting channels slidably, to form a volume-variable cavity, the volume-variable cavity being located at a sliding direction of the sliding block, and the crankshaft being rotated, to drive the sliding blocks to slide back and forth in the limiting channels while interacting with the crossed groove structure, so that the crossed groove structure and the sliding block are rotated in the cylinder sleeve,
• wherein in the case that one of the two sliding blocks is at a dead point position, driving torque of the other of the two sliding blocks is the maximum, and the crossed groove structure is driven to rotate by the sliding block with the maximum driving torque, and then the sliding block at the dead point position is driven to rotate by the crossed groove structure.