A control system, method and application of photovoltaic direct drive inverter air conditioner cooling equipment

Abstract

The invention belongs to the technical field of cooling equipment control, and discloses a photovoltaic direct-drive variable frequency air conditioner cooling equipment control system, method and application. Solar energy is converted into electric energy, energy of a plurality of photovoltaic panels is gathered together, and the converted electric energy drives an air conditioner main unit air conditioner compressor to refrigerate; in the conversion process, a frequency converter can generate heat, and heat dissipation and cooling are conducted through the photovoltaic cooling equipment; thechange of the voltage of a photovoltaic direct-current bus is detected, the unit operation mode is pre-judged to be divided into a night operation mode and a daytime operation mode, and after the unit operation mode is confirmed to be completed, the unit operation state is recognized, so that the compressor operation frequency of the cooling equipment is controlled by sections to quickly respondto adjust the junction temperature of the frequency converter module and control the refrigerant circulation amount. According to the change of the output power of the frequency converter, the junction temperature of the frequency converter module is adjusted in real time, the refrigerant circulation amount is accurately controlled, supercooling and overheating adjustment is avoided, safe and stable operation of the photovoltaic direct-drive frequency converter is guaranteed, and meanwhile the reliability of cooling equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of cooling equipment control, and in particular relates to a control system, method and application of photovoltaic direct-drive inverter air conditioner cooling equipment. Background technique [0002] At present, the closest existing technology: In recent years, with the rapid development of my country's economy and the improvement of energy saving and emission reduction requirements, the photovoltaic direct drive inverter air conditioner system has obvious advantages in environmental protection and energy saving; The direct current is directly incorporated into the DC bus of the inverter unit of the unit, so as to achieve the effect of direct drive conversion of photovoltaic energy. During the conversion process, the inverter module (including the rectifier module and inverter module) generates a large amount of heat; Inverter module cooling and heat dissipation method: through detecting the temperature of ...

AI Technical Summary

Problems solved by technology

[0005] (1) Existing photovoltaic direct-drive inverter air-conditioning systems are prone to overcooling and overheating due to the control of refrigerant circulation

[0006] (2) The existing photovoltaic direct drive inverter air conditioning system has poor reliability of cooling equipment

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