Title:
OIL RETURN CONTROL METHOD FOR COMPRESSOR OF AIR CONDITIONING SYSTEM IN REFRIGERATION MODE
Document Type and Number:
WIPO Patent Application WO/2021/208523
Kind Code:
A1
Abstract:
Disclosed is an oil return control method for a compressor of an air conditioning system in a refrigeration mode. The air conditioning system comprises a compressor (1), a four-way valve (2), an outdoor heat exchanger (3), a first throttling element (4), a bridge-type rectifying pipeline (5), an oil controller (6), an indoor heat exchanger (7) and a second throttling element (8). The oil return control method comprises: when the air conditioning system operates in a refrigeration mode, acquiring an outdoor environment temperature; comparing the outdoor environment temperature with an outdoor temperature threshold value; when the outdoor environment temperature is larger than or equal to the outdoor temperature threshold value, acquiring an indoor environment temperature, an indoor coil pipe temperature and the rotation speed of an inner fan; calculating an indoor temperature difference based on the indoor environment temperature and the indoor coil pipe temperature; determining a target opening degree of the second throttling element (8) on the basis of the indoor temperature difference and the rotation speed of the inner fan; and controlling the opening degree of the second throttling element (8) to be adjusted to the target opening degree.
Inventors:
CUI JUN (CN)
XU JIAJIA (CN)
LUO RONGBANG (CN)
SUN YANAN (CN)
XU JIAJIA (CN)
LUO RONGBANG (CN)
SUN YANAN (CN)
Application Number:
PCT/CN2020/142347
Publication Date:
October 21, 2021
Filing Date:
December 31, 2020
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD (CN)
HAIER SMART HOME CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F25B49/02; F25B30/02; F25B41/00
Foreign References:
| CN105299979A | 2016-02-03 | |||
| CN106247652A | 2016-12-21 | |||
| JP2018200145A | 2018-12-20 | |||
| JP2019078440A | 2019-05-23 | |||
| CN110806036A | 2020-02-18 | |||
| CN109140829A | 2019-01-04 | |||
| CN109341123A | 2019-02-15 | |||
| CN106766371A | 2017-05-31 | |||
| CN106500390A | 2017-03-15 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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