Fault diagnosis and energy-saving potential identification method for multi-split air conditioning system and multi-split air conditioning system
A technology with multi-connected systems and energy-saving potential, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as low misjudgment rate, system performance degradation, abnormal shutdown, etc., and achieve reliable methods Effect
Pending Publication Date: 2022-05-13
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
At present, when making fault judgments in the industry, most of the judgments are made by identifying whether the system operating parameters exceed the preset range. For example, when the maximum value of the suction superheat of the system exceeds the limit value, it is judged that the system is short of refrigerant. The misjudgment rate of this judgment method Low, but the judgment can only be realized after a serious system failure occurs. At this time, the system performance has declined seriously, or even abnormal shutdown has occurred, so this method is not feasible
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[0031] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.
[0032] The invention proposes a method for fault diagnosis and energy-saving potential identification of a multi-connection system. The multi-connection system includes a multi-connection air conditioner.
[0033] The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle consists of a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to air that has been conditioned and heat exchanged.
[0034] The compressor compresses refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refriger...
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The invention provides a multi-split air conditioner system fault diagnosis and energy-saving potential recognition method. The method comprises the following steps that S1, a multi-split air conditioner fault diagnosis and energy-saving potential recognition model is built based on association rules; s2, collecting operation data of the actually used multi-split air conditioner; and S3, the collected data are processed, fault pre-diagnosis and energy-saving potential analysis are conducted through the model established in the step S1, multi-split soft fault recognition can be achieved through the multi-split actual operation data, the influence of the soft fault on system performance is estimated, and the method is reliable. The multi-split air conditioner can execute the fault diagnosis and energy-saving potential recognition method for the multi-split air conditioner, the multi-split air conditioner with the soft fault can be recognized through actual operation data, the influence of the soft fault on the system performance can be estimated, and the method is reliable.
Description
technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a multi-connection system fault diagnosis and energy-saving potential identification method and the multi-connection system. Background technique [0002] Multi-connection systems have been widely used in buildings. The control of multi-connection equipment is complex, the actual installation and operation environment is uncontrollable, and failures are inevitable under long-term operation, especially the "soft failure" of the system. "Soft failure" (progressive failure) refers to a certain degree of equipment aging and performance degradation due to some reason, such as heat exchanger fouling, refrigerant leakage and compressor wear and so on. This kind of failure is usually caused by the gradual aging or wear of system components, so serious problems such as downtime and damage will not occur in the initial stage of the failure, and it is difficult to direc...
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Patent Timeline
Login to View More IPC IPC(8): F24F11/38F24F11/62F24F11/58F24F11/89F24F11/64
CPCF24F11/38F24F11/62F24F11/58F24F11/89F24F11/64
Inventor 夏兴祥石靖峰张佳舒孟建军
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST