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

Claim 3:
4. 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 has one or more sets of indoor modules (300) switched from a heating mode to the defrosting mode and one or more sets of hydraulic modules (200) switched from a water heating mode to the defrosting mode, the first four-way valve (2) and the second four-way valve (3) are powered down, each set of indoor modules (300) previously in an off state remains off, each set of indoor modules (300) previously in the heating mode has its fan turned off and the first electronic expansion valve (12) thereof is adjusted to a maximum opening degree; the first electromagnetic valve (13), the second electromagnetic valve (14), and the first electronic expansion valve (12) of each set of hydraulic modules (200) previously in an off state are turned off; each set of hydraulic modules (200) previously in the water heating mode is switched to a water refrigeration mode, and the first electromagnetic valve (13) thereof is turned on, the second electromagnetic valve (14) thereof is turned off, and the first electronic expansion valve (12) thereof is adjusted to a maximum opening degree.