Patent ID: 11906221
Assignee: GUANGDONG GIWEE TECHNOLOGY CO. LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 1:
2. The defrosting control method of a multi-functional multi-split system with double four-way valves according to claim 1, wherein when the multi-split system only has one or more sets of indoor modules (300) switched from a heating mode to the defrosting mode, the first four-way valve (2) and the second four-way valve (3) are powered down, all the indoor modules (300) are switched to a refrigeration mode for operation and the fan of each indoor heat exchanger (11) is turned off, the first electronic expansion valve (12) of each indoor heat exchanger (11) is adjusted to a maximum opening degree, the first electromagnetic valves (13) and the second electromagnetic valves (14) of all the hydraulic modules (200) are turned off, and the first electronic expansion valves (12) of all the hydraulic heat exchangers (10) are turned off.