Control method and device of refrigerating system, refrigerating system and air conditioning equipment

The invention discloses a control method and device of a refrigerating system, the refrigerating system and air conditioning equipment, relates to the technical field of air conditioners, and solves the technical problems that in the prior art, when a variable-frequency condensing unit operates in a hot fluorine defrosting mode, a driving plate of a compressor has the potential safety hazard of condensation, and shutdown protection possibly occurs in the unit in the later period of defrosting. The control method of the refrigerating system comprises the following steps that the operation mode of the refrigerating system is obtained; and based on the operation mode of the refrigerating system, the communication state of each connector in the first four-way reversing valve and the second four-way reversing valve is controlled, and during the defrosting period of the refrigerating system, a driving plate of the compressor is in a non-condensation state, and the refrigerating system is in a non-protection shutdow