Method and device for controlling multi-split air-conditioning system
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A multi-connected air conditioner and control method technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as compressor frequency drop
Active Publication Date: 2016-01-27
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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[0008] Embodiments of the present invention provide a control method and device for a multi-connected air-conditioning system, so as to at least solve the problem of refrigerant in the running indoor unit in a modular multi-connected air-conditioning...
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Embodiment 1
[0037] An embodiment of the present invention provides a control method for a multi-connected air-conditioning system, specifically as figure 2 shown, including:
[0038] S101. During the detection cycle of the multi-connected air-conditioning system, the control device of the multi-connected air-conditioning system determines the subcooling degree of the heat exchanger in the j-th closed indoor unit in the i-th cycle, i≥1, j≥1, i , j are both integers.
[0039] Specifically, in the embodiment of the present invention, in order to achieve real-time control of the air-conditioning system, a detection cycle can be set, that is, the control device of the multi-connected air-conditioning system is used to detect the heat exchanger in the closed indoor unit every certain detection cycle. The subcooling degree is used to further control the multi-connected air conditioning system.
[0040] Specifically, in the embodiment of the present invention, the degree of subcooling refers t...
Embodiment 2
[0083] An embodiment of the present invention provides a control device 60 for a multi-connected air-conditioning system, specifically as Image 6 As shown, it includes: a subcooling degree determination unit 601 , an electronic expansion valve opening change acquisition unit 602 , an electronic expansion valve opening acquisition unit 603 , an electronic expansion valve opening storage unit 604 , and an electronic expansion valve opening adjustment unit 605 .
[0084] Wherein, the subcooling degree determination unit 601 is used to determine the subcooling degree of the heat exchanger in the j-th closed indoor unit in the i-th cycle within the detection cycle of the multi-connected air-conditioning system, i≥1, j≥1 , i and j are both integers.
[0085] Electronic expansion valve opening change acquisition unit 602, configured to acquire the electronic expansion of the jth closed indoor unit in the ith cycle according to the subcooling degree of the heat exchanger in the jth c...
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Abstract
Embodiments of the invention provide a method and a device for controlling a multi-split air-conditioning system, and the method and the device can improve heating capacity of the air-conditioning system. The method comprises: in a detection period of the multi-split air-conditioning system, determining and storing supercooling degree of a heat exchanger in the jth closed indoor unit in the ith period; according to the supercooling degree of the heat exchanger in the jth closed indoor unit in the ith period, obtaining a variation value of the opening of an electronic expansion valve of the jth closed indoor unit in the ith period; according to the variation value of the opening of an electronic expansion valve of the jth closed indoor unit in the ith period, and a pre-stored opening value of the electronic expansion valve of the jth closed indoor unit in the (i-1)th period, obtaining and storing a first opening value of the electronic expansion valve of the jth closed indoor unit in the ith period; and adjusting the opening of the electronic expansion valve of the jth closed indoor unit in the ith period to the first opening value. The invention is suitable to be used in the technical field of air-conditioning.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method and device for a multi-connected air conditioning system. Background technique [0002] With the improvement of people's living standards, the requirements for the heating / cooling performance of air conditioners are also getting higher and higher. Typically, an important factor affecting the heating / cooling performance of an air conditioning system is the compressor in the system. [0003] In the prior art, for a modular multi-split system, only some indoor units may run in the system. For the closed indoor unit, since the fan of the heat exchanger in the indoor unit has stopped working, the high-temperature and high-pressure gaseous refrigerant will flow out through the electronic expansion valve placed at the outlet of the heat exchanger after entering the heat exchanger, and continue to circulate in gaseous form. However, since the opening of the el...
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IPC IPC(8): F24F11/00
Inventor 李丛来郭来红杜明龙迟武功
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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