The principle structure, advantages and disadvantages of scroll refrigeration compressor

The principle structure, advantages and disadvantages of scroll refrigeration compressor Principle: The scroll line pattern of the moving plate and the static plate are the same, but the phase difference is 180°C; they mesh to form a series of closed spaces; the static plate does not move, and the moving plate revolves around the center of the fixed plate with the eccentricity as the radius. When the moving disc revolves, it meshes in sequence, so that the crescent-shaped area is continuously compressed and reduced, so that the gas is continuously compressed and finally discharged from the center hole of the static disc. Structure: moving disc (vortex rotor), static disc (vortex stator), bracket, cross coupling ring, back pressure cavity, eccentric shaft compressor Advantages of scroll compressors: 1. The eccentric shaft driving the movable scroll can rotate at high speed, and the scroll compressor is small in size and light in weight; 2. 2. The force changes of moving parts such as the movable scroll and the main shaft are small, and the vibration of the whole machine is small; 3. It is suitable for variable speed movement and frequency conversion speed regulation technology; 4. The noise of the scroll compressor is very low; 4. The scroll compressor has reliable and effective sealing, and its refrigeration coefficient does not decrease with the increase of operating time, but slightly increases; 5. The scroll compressor has good working characteristics. In the heat pump air conditioning system, it is especially manifested in high heating performance, good stability and high safety; 6.7. The scroll compressor has no clearance volume and can maintain high volume efficiency operation; 7. Small torque change, high balance, small vibration, stable operation, easy to operate, and easy to realize automation 9. Fewer moving parts, no reciprocating mechanism, simple structure, small size, light weight, few parts, high reliability, life span is more than 20 years. Disadvantages of scroll compressors: 1. The surface of the moving parts is mostly curved. The processing and inspection of these curved surfaces are relatively complicated. The manufacturing requires high-precision processing equipment and precise self-aligning assembly technology, so the manufacturing cost is high. 2. Between the moving parts or between the moving parts and the fixed parts, the sealing is often achieved by maintaining a certain movement gap. The gas passing through the gap will inevitably cause leakage, which limits the difficulty of the rotary compressor to achieve greater compression. Compared with, therefore, most rotary compressors are used in air-conditioning conditions.