Title:
OIL RETURN CONTROL METHOD AND APPARATUS FOR VARIABLE REFRIGERANT FLOW (VRF), AND ELECTRONIC DEVICE AND VRF SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/082771
Kind Code:
A1
Abstract:
An oil return control method and apparatus for variable refrigerant flow (VRF), and a VRF system. The oil return control method for VRF comprises: when a VRF system needs to enter an oil return operation, dividing, according to an operating state of each indoor unit, indoor units into a first indoor unit and a second indoor unit, wherein the oil return operation comprises a plurality of oil return stages; and using different control strategies at each oil return stage, so as to control the frequency of a compressor of the VRF system and control the opening degree of an indoor unit valve of at least one of the first indoor unit and the second indoor unit.
Inventors:
YU KAI (CN)
FU YINGSHENG (CN)
ZHANG HUI (CN)
XUE HANDONG (CN)
NI YI (CN)
YANG LI (CN)
FU YINGSHENG (CN)
ZHANG HUI (CN)
XUE HANDONG (CN)
NI YI (CN)
YANG LI (CN)
Application Number:
PCT/CN2023/110549
Publication Date:
April 25, 2024
Filing Date:
August 01, 2023
Export Citation:
Assignee:
GREE ELECTRIC APPLIANCES INC OF ZHUHAI (CN)
International Classes:
F24F11/30; F24F11/64; F24F11/84; F24F11/86; F24F11/88; F25B31/00; F25B49/02
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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