A control method, system, and air conditioner for a frequency conversion magnetic levitation air conditioner in a data computer room

Abstract

The invention provides a control method, system and air conditioner for a frequency conversion magnetic levitation air conditioner in a data computer room. The air conditioner unit enters a self-inspection state after being turned on and runs, and controls whether to enter the backup power supply mode by checking whether the working voltage is normal. Energy storage in the backup power supply mode The unit serves as a power supply unit to provide power for the unit, and at the same time record the operating parameters of the unit before power failure, and quickly output the corresponding current to restore the original operating state of the unit after power failure and recovery. The power source of the floating shaft is provided for the bearing by storing energy. When the power is cut off, the stored energy is released to continuously supply power to the bearing to ensure the normal and stable floating shaft of the magnetic levitation bearing. The corresponding current generates electromagnetic force for the bearing windings, ensuring that the rotating shaft is suspended at the set position to quickly return to the original operating state and quickly restore the cooling of the machine room.

Description

technical field [0001] The invention relates to the technical field of air conditioner control, in particular to a control method and system for a frequency conversion magnetic levitation air conditioner in a data room, and an air conditioner. Background technique [0002] With the vigorous development of mobile Internet, Internet of Things, and cloud computing, as an important carrier of information, data centers are ushering in a new wave of construction. The national government has begun to deploy national cloud computing infrastructure to provide technical support for the development of informatization in the fields of government affairs, economy, and people's livelihood. Data centers have become a national strategic emerging industry. The cooling equipment in the data room is a supporting facility established to ensure the temperature and humidity environment required for the operation of IT equipment. The data center is equipped with a large number of IT equipment, wh...

AI Technical Summary

Problems solved by technology

The heat density of IT equipment is very high, and a short-term interruption of cooling will cause a rapid rise in the temperature of the system room, resulting in continuous accumulation of heat, seriously affecting the normal operation of IT equipment, and even causing downtime, leading to serious failures and causing serious damage to the data center. Irreversible impact and huge economic loss. Therefore, the frequency conversion centrifugal chiller in the data center has extremely high requirements for rapid recovery of cooling supply. It must have the function of self-starting and quick start after power failure. The general technical requirement in the industry is to switch to the backup power supply within 30 seconds after power failure. , The unit completes startup within 80 seconds, reaches full load within 240 seconds, and quickly restores the cooling of the machine room. The magnetic suspension variable frequency centrifugal chiller uses magnetic suspension bearings instead of traditional mechanical bearings, realizing the complete oil-free operation of the refrigeration system and avoiding complicated lubrication. The oil system can reduce the influence of lubricating oil on heat exchange, and further improve the performance of the unit. The bearing does not require maintenance within the service life of the unit, which greatly improves the reliability of the system. This technology is widely used, but according to the current control characteristics of the magnetic suspension bearing system, it cannot meet short-term requirements. Restart after power failure to quickly restore cooling. After power failure, the magnetic suspension bearing cannot continue to float the shaft. When the power supply system resumes normal power supply, the magnetic suspension bearing needs to refloat the shaft in advance. After the magnetic suspension bearing floating shaft is stable, the unit will follow the specific procedure The cooling can only be restarted after the start-up conditions are met. The whole process from the bearing floating shaft to the stability of the floating shaft and then to the unit meeting the start-up conditions is expected to start and resume cooling. Rapid rise, resulting in continuous accumulation of heat, seriously affecting the normal operation of IT equipment

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