Title:
OIL RETURN CONTROL METHOD AND APPARATUS AND MULTI-SPLIT AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2022/111224
Kind Code:
A1
Abstract:
An oil return control method and apparatus, and a multi-split air conditioner. The method comprises: determining the average length, first correction coefficient and second correction coefficient of a connecting pipe between indoor and outdoor units according to system operating parameters; determining a corresponding oil return priority on the basis of the average length, first correction coefficient and second correction coefficient of the connecting pipe; and controlling an oil return operation of the multi-split air conditioner on the basis of the oil return priority. According to the oil return control method and apparatus, and the multi-split air conditioner, different oil return priorities can be determined according to actual engineering circumstances, the oil return priority design is guaranteed to be reasonable and reliable, precise oil return is achieved, oil return is ensured when required by a unit, and the phenomenon in which the oil quantity of the unit is sufficient but oil return is frequent, or the unit has missing oil but does not promptly return oil is avoided.
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Inventors:
JIAO HUACHAO (CN)
SHEN CHUANTAO (CN)
JIN MENGMENG (CN)
WU LIANFA (CN)
SHEN CHUANTAO (CN)
JIN MENGMENG (CN)
WU LIANFA (CN)
Application Number:
PCT/CN2021/127898
Publication Date:
June 02, 2022
Filing Date:
November 01, 2021
Export Citation:
Assignee:
GREE ELECTRIC APPLIANCES INC ZHUHAI (CN)
International Classes:
F24F11/61; F24F11/64; F24F11/86; F25B31/00; F24F140/20
Foreign References:
| CN112361538A | 2021-02-12 | |||
| CN109682035A | 2019-04-26 | |||
| CN106369879A | 2017-02-01 | |||
| CN109489210A | 2019-03-19 | |||
| CN107218741A | 2017-09-29 | |||
| CN106247676A | 2016-12-21 | |||
| CN110296546A | 2019-10-01 | |||
| JP2012145251A | 2012-08-02 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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