Compressor preheating control method and system, storage medium and air conditioner outdoor unit

Abstract

The invention discloses a compressor preheating control method and system, a storage medium and an air conditioner outdoor unit. The compressor preheating control method comprises the steps that the current environment temperature is detected, and whether the current environment temperature is lower than preset heating temperature or not is judged; when the current environment temperature is lowerthan the preset heating temperature, a winding resistance value of a current compressor is detected; the winding temperature of the current compressor is calculated according to the winding resistance value of the current compressor, preset standard temperature and a delivery resistance value; and when the winding temperature of the current compressor is lower than the preset heating temperature,heating currents are output to a compressor winding, the winding temperature of the current compressor continues to be calculated, and the heating currents stop being output till the winding temperature of the compressor is higher than target temperature. According to the compressor preheating control method, whether preheating needs to be conducted or not is judged by directly detecting the winding temperature in the compressor, therefore, monitoring errors of the external temperature are avoided, and more effective and more accurate compressor preheating control is achieved.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a compressor preheating control method, system, storage medium and an air conditioner outdoor unit. Background technique [0002] Air conditioner compressor lubricating oil has a certain viscosity, the lower the temperature, the greater the viscosity. In the cold winter, if the air conditioner is placed outside for a long time without running, the temperature of the compressor and the lubricating oil of the compressor will drop to close to the ambient temperature. At this time, the viscosity of the lubricating oil is very high. If the user needs to start the air conditioner at this time , often cause startup failure due to too high viscosity of lubricating oil. [0003] In the prior art, the compressor is often preheated by adding a compressor crankshaft heating belt, but this method is costly, consumes a lot of power, and has poor preheating effect; However, in the shutdow...

AI Technical Summary

Problems solved by technology

In the cold winter, if the air conditioner is placed outside for a long time without running, the temperature of the compressor and the lubricating oil of the compressor will drop to close to the ambient temperature. At this time, the viscosity of the lubricating oil is very high. If the user needs to start the air conditioner at this time , often cause startup failure due to too high viscosity of lubricating oil

[0003] In the prior art, the compressor is often preheated by adding a compressor crankshaft heating belt, but this method is costly, consumes a lot of power, and has poor preheating effect; However, in the shutdown state, there is a large difference between the discharge temperature and the compressor oil temperature. If the environment of the external machine is low, the discharge temperature will drop rapidly after the compressor stops, but the temperature of the internal lubricating oil will drop slowly. When relying on monitoring the exhaust gas temperature to judge whether preheating is required, deviations will occur, resulting in inaccurate preheating control

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