Control method of frequency limiting and reducing of compressor and inverter air conditioner

Abstract

The invention discloses a control method of frequency limiting and reducing of a compressor and an air conditioner using the method. The control method of frequency limiting and reducing comprises thesteps of detecting running parameters of the compressor, judging the interval range of the running parameters, and according to the judgment result, carrying out frequency limiting and reducing control over the compressor. Through monitoring of the current of the compressor and the temperature of a drive board, the running frequency of the compressor is controlled, elements of the compressor, thedrive board and the like can run within the normal range, happening of electric appliance safety accidents can be avoided, meanwhile, a unit can continuously run, frequent shutdown is not needed, andindoor temperature stability is ensured.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method for limiting and reducing frequency of a compressor and an inverter air conditioner using the method. Background technique [0002] Compressor frequency limitation and frequency reduction are protection measures implemented to protect the reliable operation of the air conditioning system or the components of the unit from being damaged. There are two types of compressor limit and frequency reduction: main control limit and frequency reduction and driving limit and frequency reduction. The main control limit and frequency reduction refer to the frequency limit and reduction of the compressor controlled by the motherboard. The parameters involved in the control are generally the discharge temperature, discharge pressure or suction pressure. The drive limit and frequency reduction refers to the frequency limit and reduction of the compressor controlled by ...

AI Technical Summary

Problems solved by technology

[0004] 1. If the current limit and frequency reduction are not timely, the built-in protection of the compressor will be damaged;

[0005] 2. Temperature limit and untimely frequency reduction will lead to control disorder of the drive board, damage to the drive board and even electrical safety accidents;

[0006] 3. The frequency limit and frequency reduction are timely but the reaction is overdone, that is, the frequency reduction of the compressor is too fast, the amplitude is too large, or the periodic fluctuation will cause the indoor temperature to fluctuate violently or not be controlled at all.

This is fatal for air conditioner regulators that have high requirements for temperature accuracy

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