Method for preventing liquid accumulation of compressor and air conditioner

Abstract

The invention provides a method for preventing the liquid accumulation of a compressor and an air conditioner, and relates to the technical field of air conditioners. The method for preventing the liquid accumulation of the compressor comprises the steps of before an air conditioning unit is started, obtaining the outer ring temperature Ta; if the outer ring temperature Ta is smaller than or equalto a first preset temperature t1, obtaining the exhaust temperature Td; and if the exhaust temperature Td is smaller than or equal to a second preset temperature t2, starting a first electric heatingpiece arranged on the compressor till the exhaust temperature Td reaches a third preset temperature t3, and closing the first electric heating piece. Thus, whether the accumulated liquid is generatedin the compressor or not is judged, and if yes, the first electric heating piece is started to evaporate the accumulated liquid in the compressor; whether the accumulated liquid in the compressor iscompletely evaporated or not is judged by detecting the exhaust temperature Td, and if the accumulated liquid is completely evaporated, the first electric heating piece is turned off, so that the excessive accumulated liquid is prevented from existing in the compressor for a long time, the service life of the compressor is guaranteed, and the reliability of the air conditioning unit is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for preventing liquid accumulation in a compressor and an air conditioner. Background technique [0002] The air conditioning unit operates in a low-temperature environment. Due to poor heat exchange, it is easy for the refrigerant to evaporate incompletely, causing the low-temperature liquid refrigerant to return to the gas-liquid separator and compressor, which affects the reliability of the whole machine. Especially in the case of non-standard installation of some projects, the situation will be even worse when the additional refrigerant exceeds the amount. [0003] At present, in order to prevent the compressor from accumulating liquid, the common method is to tie an electric heating belt at the bottom of the compressor. The current commonly used electric heating belt has low power, and the heat needs to be transferred to the refrigerant through the shell o...

AI Technical Summary

Problems solved by technology

The current commonly used electric heating belt has low power, and the heat needs to be transferred to the refrigerant through the shell of the compressor to heat it. During the heat transfer process, the thermal resistance is large and the efficiency is low. It is inevitable that the gaseous refrigerant returning to the compressor will still carry a certain amount of The condition of liquid refrigerant will cause liquid shock in the compressor, reduce the service life of the compressor, and affect the reliability of the whole machine

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