Compress Driving Device, Compressor Pressure Protection Method, and Air Conditioner

A compressor driving device, used for driving a compressor of a refrigerating system, comprising:

• a three-phase alternating current power supply input end;
• a relay module;
• a rectifier circuit;
• and
• a driving control circuit which are sequentially connected, wherein:
• the rectifier circuit is configured to convert a connected alternating current into a direct current and then output the direct current to a direct current bus;
• the driving control circuit is configured to convert the direct current outputted by the direct current bus into compressor driving power to drive the compressor;
• the compressor driving device further comprises a pressure switch,
• the pressure switch is connected in series to a power supply circuit of the relay module, and configured to measure a pressure value in the refrigerating system and disconnect the power supply circuit of the relay module when the measured pressure value is greater than a preset pressure threshold;
• and
• the driving control circuit is further configured to detect an on-off state of the pressure switch and control the compressor to stop working when the pressure switch is switched off.