Title:
CONTROL METHOD FOR OIL RECOVERY IN PIPE OF OUTDOOR UNIT
Document Type and Number:
WIPO Patent Application WO/2023/279608
Kind Code:
A1
Abstract:
The present invention relates to the technical field of air conditioner self-cleaning, and relates in particular to a control method for oil recovery in a pipe of an outdoor unit. The present application aims to solve the problem of how to implement oil recovery in a pipe of an outdoor unit. For said purpose, the air conditioner of the present application comprises a recovery pipe, one end of the recovery pipe communicating with an inlet of an outdoor heat exchanger, the other end communicating with an air suction port of a compressor, and an on-off valve being provided on the recovery pipe. The method comprises: in response to a received instruction for recovering oil in a pipe, entering an outdoor unit in-pipe oil recovery mode; controlling an air conditioner to operate in a heating mode; controlling a compressor to adjust to a preset first recovery frequency; adjusting the degree of opening of a throttling device, so that the coil temperature of the outdoor heat exchanger is below or equal to a preset temperature; when the coil temperature is below or equal to the preset temperature and continues for a first preset duration, controlling the air conditioner to switch to a cooling mode; and controlling the on-off valve to open, and turning off the throttling device to the smallest degree of opening. In the present application, oil recovery in a pipe of an outdoor unit can be achieved.
Inventors:
LUO RONGBANG (CN)
Application Number:
PCT/CN2021/129797
Publication Date:
January 12, 2023
Filing Date:
November 10, 2021
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD (CN)
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F25B43/02; F24F11/67; F24F11/84; F24F11/86; F25B47/00
Foreign References:
| CN110857809A | 2020-03-03 | |||
| JP2013257121A | 2013-12-26 | |||
| CN113483475A | 2021-10-08 | |||
| CN113483477A | 2021-10-08 | |||
| CN109297151A | 2019-02-01 | |||
| CN112032827A | 2020-12-04 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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