Multi-compressor refrigerating system and air conditioner

The multi-compressor refrigerating system comprises an outdoor heat exchanger, an indoor heat exchanger and at least two compressors, and the outdoor heat exchanger is provided with outdoor heat exchange pipes which correspond to the compressors one to one and are independent of the compressors. The indoor heat exchanger is provided with indoor heat exchange pipes which are in one-to-one correspondence with the compressors and are independent of each other, a throttling element is connected between the outdoor heat exchanger and the indoor heat exchanger in series, and each compressor, the corresponding outdoor heat exchange pipe and the corresponding indoor heat exchange pipe serve as a refrigerating loop. The on-off state of the refrigerating circuit, the opening degree of the throttling element, the fan rotating speed of the indoor heat exchanger and the fan rotating speed of the outdoor heat exchanger are all controlled by the main control module. The air conditioner has the advantages of low cost, free s