Load connection detection method and device of double-shaft frequency converter, liquid cooling unit and air conditioner

The embodiment of the invention discloses a load connection detection method and device of a double-shaft frequency converter, a liquid cooling unit and an air conditioner. The load connection detection method of the double-shaft frequency converter comprises the following steps: acquiring the operation condition of a water pump or a fan; acquiring the water pressure of the water pump according to the operation of the water pump; acquiring the air pressure of the fan according to the operation of the fan; and judging whether the two output ends of the double-shaft frequency converter are misconnected or not according to the water pressure or the air pressure. According to the method, the operation condition of the water pump or the fan is obtained, the water pressure of the water pump is obtained according to operation of the water pump, the air pressure of the fan is obtained according to operation of the fan, and whether the two output ends of the double-shaft frequency converter are misconnected or not is judged according to the water pressure or the air pressure. The probability that misconnection of the double-shaft drive output terminal and the two loads cannot be found in time is reduced, so that the occurrence rate that misconnection affects the operation reliability of the air conditioner liquid cooling unit is reduced, and potential safety hazards of operation are reduced.