Air-conditioner and control method thereof

Abstract

The invention discloses an air-conditioner and a control method thereof. The air-conditioner comprises a compressor driver board, a coolant cooling module, a first electromagnetic valve, a second electromagnetic valve and a controller; a liquid inlet on one side of the coolant cooling module is connected with a connecting pipeline through the first electromagnetic valve, while a liquid outlet on one side of the coolant cooling module is connected with the same connecting pipeline through the second electromagnetic valve; the controller controls the openings of the first electromagnetic valve and the second electromagnetic valve according to a temperature of the compressor driver board, thereby controlling the temperature of the compressor driver board within a predetermined range. By means of the technical solution, the air-conditioner is capable of controlling the openings of the first electromagnetic valve and the second electromagnetic valve according to the temperature of the compressor driver board, thereby controlling a quantity of a coolant entering the coolant cooling module and achieving a purpose of controlling a cooling temperature of the compressor driver board.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioner and a control method for the air conditioner. Background technique [0002] At present, multi-split units usually use refrigerant to cool the compressor driver board, which is mainly cooled by liquid pipes. The working principle of this method is that after the refrigerant exchanges heat in the condenser of the outdoor unit, it goes around to the refrigerant cooling module to cool the compressor drive plate, and then the refrigerant flows out to the liquid pipe. [0003] Although the above-mentioned technical scheme in the prior art can basically meet the requirements, there will be the following problems: [0004] (1) Large pressure loss. The pipe section of the refrigerant from the outlet pipe of the condenser to the refrigerant cooling module is gradually reduced due to the diameter of the pipe, so that the pressure loss of the unit also increases. [0005...

AI Technical Summary

Problems solved by technology

[0005] (2) For units operating under T3 high temperature conditions, the cooling effect of the existing technology on the compressor drive plate is not significant

Especially, when the outdoor unit is running at low frequency and the indoor unit is turned on alone, the flow of refrigerant is insufficient to cool down the compressor drive board, which will cause the unit to report to the compressor IPM protection and stop the unit

[0006] (3) When the unit is operated under high temperature conditions for a long time, the aging of the components of the compressor drive board of the unit will be accelerated, and the solder joints will fall off

[0007] (4) When the unit operates at low temperature for a long time, condensation will appear in the electrical box

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