Photovoltaic direct-drive variable-frequency air conditioner control method, computer readable storage medium and air conditioner

Abstract

The invention provides a photovoltaic direct-drive variable-frequency air conditioner control method, a computer readable storage medium and an air conditioner. The photovoltaic direct-drive variable-frequency air conditioner control method is characterized in that after an air-conditioning unit is powered on, the photovoltaic power generation efficiency and the air-conditioning power consumptionare detected in real time, calculated and analyzed; the heat generation situation of a frequency converter rectification module is preliminarily judged, and then the temperature of the frequency converter rectification module is detected; and the running parameters of an air-conditioning unit frequency converter and cooling equipment are adjusted according to the temperature of the frequency converter rectification module. The photovoltaic direct-drive variable-frequency air conditioner control method, the computer readable storage medium and the air conditioner have the beneficial effects that the air-conditioning compressor load dynamic and photovoltaic generated power matching situation can be judged through power detection; the running of the air-conditioning unit and the cooling equipment can be adaptively adjusted aiming at the photovoltaic high-load running and photovoltaic low-load running situations; the circulating mass of a coolant can be precisely controlled, and thus the undercooling and overheating adjustment can be avoided; accordingly, the safe and stable running of a photovoltaic direct-drive frequency converter can be guaranteed; and meanwhile, the reliability ofthe cooling equipment can be improved.

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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