Control method and system for refrigeration, oil return and noise reduction of multi-split air-conditioner
US12173943B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 2019 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Jun 4, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A control method and system for refrigeration, oil return and noise reduction of a multi-split air-conditioner, wherein the method includes: when the accumulative time that the frequency of a compressor is smaller than the set frequency threshold reaches the oil return cycle and a standby indoor unit exists, conducting an oil return running mode; resetting the accumulative time; starting counting the oil return running time; calculating the indoor unit starting load; determining the opening degree of an expansion valve of the standby indoor unit according to the indoor unit starting load and whether there is anyone in a room where the standby indoor unit is located; controlling the compressor to run according to the set oil return frequency; and when the oil return running time reaches the oil return set time, exiting the oil return running mode, and conducting a normal refrigerating running mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.