US 11,988,430 B2
Air conditioning unit for an accurate control of supply air temperature, and operation control method and operation control device for air conditioning unit
Jie Guo, Guangdong (CN); Sheng He, Guangdong (CN); Chang Liu, Guangdong (CN); and Xiuling Li, Guangdong (CN)
Assigned to Vertiv Tech Co., Ltd., Guandong (CN)
Filed by Vertiv Tech Co., Ltd., Guangdong (CN)
Filed on Nov. 24, 2022, as Appl. No. 17/993,960.
Claims priority of application No. 202111417158.5 (CN), filed on Nov. 26, 2021.
Prior Publication US 2023/0168016 A1, Jun. 1, 2023
Int. Cl. F25B 49/02 (2006.01); F25B 9/00 (2006.01); F25B 9/10 (2006.01)
CPC F25B 49/022 (2013.01) [F25B 9/002 (2013.01); F25B 9/10 (2013.01); F25B 2400/061 (2013.01); F25B 2600/0253 (2013.01); F25B 2600/13 (2013.01); F25B 2700/2104 (2013.01); F25B 2700/2106 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An air conditioning unit, comprising:
a first refrigeration system comprising a first evaporator, a first compressor, a first condenser, a first one-way valve, and a first throttling element connected in sequence in a loop as well as a second one-way valve connected in parallel with the first compressor, and a first fluorine pump connected in parallel with the first one-way valve;
a second refrigeration system comprising a second evaporator, a second compressor, a second condenser, a third one-way valve, and a second throttling element connected in sequence in a loop as well as a fourth one-way valve connected in parallel with the second compressor, and a second fluorine pump connected in parallel with the third one-way valve, wherein the first evaporator is upstream from the second evaporator in an airflow direction in a return air cooling duct; and
a controller communicatively connected to the first compressor, the first fluorine pump, the second compressor and the second fluorine pump, and configured to:
acquire a load percentage of the air conditioning unit and a difference between indoor and outdoor temperatures; and
control a working state of the first compressor, the first fluorine pump, the second compressor and the second fluorine pump based on the load percentage and the difference between indoor and outdoor temperatures,
wherein the controlling comprises controlling the working state of the first compressor, the first fluorine pump, the second compressor and the second fluorine pump by comparing the difference between indoor and outdoor temperatures with a first preset value and a second preset value greater than the first preset value, and
wherein the first preset value and the second preset value increase with increasing of the load percentage.