Solar air conditioning system and its control method

Abstract

The invention discloses a solar air-conditioning system and a control method thereof. The solar air-conditioning system comprises a solar cell array, a photovoltaic converter and an air-conditioning unit. The photovoltaic converter comprises a booster circuit, a rectification and inversion grid-connected circuit and a control circuit, wherein the booster circuit is used for controlling the solar cell array to output the maximum power through maximum power output control signals, and the rectification and inversion grid-connected circuit is used for switching rectification and inversion grid-connected working states through state switching control signals, so that energy of a public electric network and energy of the solar cell array are used for supplying power to the air-conditioning unit, and the energy of the solar cell array is controlled to be fed back to the public electric network. By the adoption of the solar air-conditioning system and the control method of the solar air-conditioning system, the problems that excessive energy output by a solar cell array in the prior art can not be fed back the power grid and high costs are caused by the adoption of a storage battery are solved, and the effects that the excessive energy of solar power generation is fed back to the power grid, meanwhile, the power grades of an air conditioner are expanded, and the cost is reduced are achieved.

Description

Technical field [0001] The invention relates to the field of air conditioners, in particular to a solar air conditioning system and a control method thereof. Background technique [0002] Such as figure 1 The shown multi-line air conditioning system mainly includes a solar cell array 100', a DC / DC converter, an AC / DC converter, an air conditioning unit 300', a storage battery 700', and a single-phase power grid 400'. [0003] The DC / DC converter 301' is a DC-DC converter, a voltage converter that converts an input voltage and outputs a fixed voltage. The AC / DC converter 303' is an AC-DC converter and is used to convert AC input into DC output. [0004] in figure 1 In the multi-connected air-conditioning system shown, the solar cell array converts sunlight into direct current. After the direct current is converted by the DC / DC converter, the direct current voltage is output to the air-conditioning unit. At the same time, the DC / DC converter can realize the effect of the solar panel ...

AI Technical Summary

Problems solved by technology

[0016] Aiming at the problems in related technologies that the excess energy output by solar cell arrays cannot be fed back to the grid, the cost of using batteries is too high, and the power level of air conditioners is small, the use of occasions is limited, and the cost of investment is difficult to promote, no effective solutions have been proposed yet. solution, for this reason, the main purpose of the present invention is to provide a kind of solar air conditioning system and its control method, to solve the above problems

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