A control method for a photovoltaic direct-drive inverter air conditioner, a computer-readable storage medium, and an air conditioner

Abstract

The invention provides a control method for a photovoltaic direct-drive inverter air conditioner, a computer-readable storage medium, and an air conditioner. After the air-conditioning unit is powered on, the photovoltaic power generation power and the air-conditioning power consumption are detected in real time, and the photovoltaic power generation power and the air-conditioning power consumption are calculated and analyzed. Power, initially judge the heat generated by the inverter rectifier module, and then detect the temperature of the inverter rectifier module, and adjust the operating parameters of the air conditioner unit inverter and cooling equipment according to the temperature of the inverter rectifier module. Determine the dynamics of the load of the air conditioner compressor and the matching of photovoltaic power generation by detecting the power, and adjust the operation of the air conditioner unit and cooling equipment adaptively according to the operation of large photovoltaic load and small photovoltaic load, and precisely control the amount of refrigerant circulation to avoid overcooling , Overheat adjustment, so as to ensure the safe and stable operation of the photovoltaic direct drive inverter, and improve the reliability of the cooling equipment at the same time.

Description

technical field [0001] The invention relates to the technical field of air conditioner control, in particular to a control method of a photovoltaic direct drive frequency conversion air conditioner, a computer-readable storage medium and an air conditioner. Background technique [0002] In recent years, with the rapid development of my country's economy and the increasing requirements for energy conservation and emission reduction, the photovoltaic direct drive inverter air conditioner system has obvious advantages in environmental protection and energy saving; The DC bus of the unit, so as to achieve the effect of direct drive of photovoltaic energy conversion. During the conversion process, the inverter module (including the rectifier module and inverter module) will generate a lot of heat; the current cooling method of the conventional photovoltaic inverter module: through The detection module temperature transmission photovoltaic cooling equipment controls the flow of refr...

AI Technical Summary

Problems solved by technology

This technology has the following disadvantages. It cannot respond to the rapid change of photovoltaic voltage and the dynamic demand of the air conditioner compressor load in real time. Detect and control the amount of refrigerant; while the temperature sensor performs data collection every few seconds, there is a lag in temperature detection, and only the average temperature of the inverter module can be obtained, and its real-time transient temperature cannot be obtained. The temperature of the cooling plate cannot be controlled within a specific range. The heat in the inverter cavity cannot be effectively reduced, and the temperature is too high, which affects the performance of the inverter; when the system switches to photovoltaic light load operation, the temperature of the cooling plate will drop sharply, and it is easy to cause condensation and liquid return problems in the cooling equipment due to overcooling. Dew will cause short circuit and burn out of the inverter module; overcooling adjustment will cause liquid return and affect the reliability of cooling equipment

[0003] The quality of the inverter cooling system will greatly affect the reliability of the inverter itself, that is, it cannot guarantee safety and stability during long-term work.

During the working process of the inverter, the current loss of the current devices causes its continuous heating, and these current devices are temperature-sensitive devices, and their switching process is easily affected by temperature changes, and the reliability of the inverter will also be greatly reduced. discount

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