Outdoor unit defrosting control method, outdoor unit defrosting control device and air conditioner

Abstract

The invention relates to an outdoor unit defrosting control method, an outdoor unit defrosting control device and an air conditioner, and belongs to the technical field of outdoor unit defrosting. Themethod includes the steps that the operating manner of the air conditioner is acquired, and when the air conditioner is in a heating manner, detection parameters are acquired; the frosting conditionof fan outdoor unit heat exchanger is determined according to the heating manner and the detection parameters; and the defrosting manners of an outdoor unit are selectively controlled according to thedetermined frosting condition, wherein the defrosting manners of the outdoor unit comprise the first defrosting manner and the second defrosting manner, in the first defrosting manner, a heating module is used for heating, and heat emitted by the heating module is blown to the outdoor unit heat exchanger through a blowing device for defrosting, and in the second heating manner, defrosting is carried out through reversing of a four-way valve. No defrosting manner is selected when no frost exists, when the frost exists, the adaptive defrosting manners are selected according to the change of thefrosting degree, the respective advantages of the two defrosting manners are exerted, the influences of defrosting on operation of an air conditioner system are lowered, and the comprehensive capacity energy efficiency of the whole air conditioner is improved.

Description

technical field [0001] The application belongs to the technical field of outdoor unit defrosting, and in particular relates to an outdoor unit defrosting control method, an outdoor unit defrosting control device and an air conditioner. Background technique [0002] At present, the energy consumed by heating accounts for a large proportion of global energy consumption. Traditional heating methods represented by gas, coal, and electricity have gradually been criticized by the public due to problems such as low efficiency, heavy pollution, and poor sustainability. It has become a global consensus to vigorously develop new energy and promote the revolution of energy production and consumption. Heat pump heating is environmentally friendly, has high energy efficiency, and is convenient and beautiful to install. In recent years, many countries or regions have issued relevant policies and regulations to encourage and guide the development of heat pump heating. [0003] However, hea...

AI Technical Summary

Problems solved by technology

However, the problem is that the frequency of frosting in dry areas is slow and the thickness of frosting is low. Continuously blowing heat to the heat exchanger of the outdoor unit for heating and defrosting is likely to enter frost-free defrosting, which consumes a lot of power and even causes air suction. The degree of superheat is relatively large, and the compressor load increases, which reduces the reliability of the system

However, in a humid environment, the frost layer on the heat exchanger of the outdoor unit tends to deteriorate rapidly, and the heat blown to the heat exchanger of the outdoor unit for defrosting cannot suppress the rate of frosting, or only the condenser in the heating module area is defrosted. The frost layer in the remaining areas is getting thicker and thicker, and the overall return air efficiency becomes poor, which affects the evaporation effect of the outdoor unit, and eventually leads to problems such as insufficient heating capacity and liquid return from the compressor

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