Title:
CONTROL METHOD AND SYSTEM FOR FLOW OF REFRIGERANT OF AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2021/190235
Kind Code:
A1
Abstract:
A control method and system for the flow of the refrigerant of air conditioner. The method comprises: step S1: in the heating mode of an air conditioner, measuring, in real time, the ambient temperature of an outdoor unit in the air conditioner and the temperature of the bottom of a compressor; step S2: determining whether the ambient temperature of the outdoor unit is less than or equal to a preset first temperature threshold, and whether the temperature of the bottom of the compressor is less than or equal to a preset second temperature threshold; if yes, proceeding to step S3; if not, proceeding to step S4; step S3: decreasing the opening degree of an electronic expansion valve located on the refrigerant entrance side of an evaporator in the outdoor unit to reduce the flow of a refrigerant entering the evaporator, and then proceeding to step S2; and step S4: adjusting the opening degree of the electronic expansion valve according to the comparison result of the actual value of the suction gas superheat of the compressor and the preset target value of the suction has superheat to adjust the flow of the refrigerant entering the evaporator, and then proceeding to step S2. In the method, according to a heating state, different flow adjustment strategies are selected to adjust the flow of the refrigerant entering the evaporator, so as to ensure that in the heating process of the air conditioner, generation of a large amount of liquid refrigerant at the bottom of the compressor and suctioning into the compressor are avoided.
Inventors:
LIU SHOUYU (CN)
XIONG CHANGYOU (CN)
GUO CHENGCAI (CN)
XIONG CHANGYOU (CN)
GUO CHENGCAI (CN)
Application Number:
PCT/CN2021/077887
Publication Date:
September 30, 2021
Filing Date:
February 25, 2021
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F24F11/30; F24F11/89
Foreign References:
| CN103438544A | 2013-12-11 | |||
| CN104132423A | 2014-11-05 | |||
| CN110440424A | 2019-11-12 | |||
| CN103162392A | 2013-06-19 | |||
| CN110736270A | 2020-01-31 | |||
| DE102014100093A1 | 2015-07-09 | |||
| JPH04263752A | 1992-09-18 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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