Compressor preheating control method and device and air conditioner

Abstract

The invention discloses a compressor preheating control method and device and an air conditioner, and relates to the technical field of air conditioners. The compressor preheating control method comprises the steps that when a compressor is shut down, whether the compressor meets a preset low-temperature shutdown condition or not is judged; if yes, a compressor driving module is controlled to electrify a motor winding of the compressor; the module temperature of the compressor driving module is obtained, and a windshield of an outer fan is controlled based on the module temperature so that the module temperature can be smaller than the preset protection temperature; and a radiator of the compressor driving module is positioned on an air channel of the outdoor fan. According to the method, a motor can be promoted to heat so that the temperature of an oil pool in the compressor can rise up, liquid refrigerant deposition in the compressor is avoided, the restarting reliability of the compressor is improved, a crankshaft heating belt does not need to be additionally arranged, the cost of the whole machine is saved, and it can be ensured that the temperature of the compressor driving module is within the normal range; and the reliability of preheating control of the compressor is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a compressor preheating control method, device and air conditioner. Background technique [0002] When the existing air conditioner is shut down during heating operation, if the compressor is shut down for a long time and the outdoor ambient temperature is low, it is easy to cause liquid refrigerant to deposit in the oil pool of the compressor. The existing compressor preheating control technology In general, a heating device is usually added to the compressor to evaporate the liquid refrigerant. Although the reliability of the start-up is improved, the cost of the air conditioning unit is increased. At the same time, if the temperature of the heating device is not properly controlled, the compressor may be damaged. lower reliability. Contents of the invention [0003] In order to solve the above problems, the present invention provides a compressor preheating control...

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Problems solved by technology

[0002] When the existing air conditioner is shut down during heating operation, if the compressor is shut down for a long time and the outdoor ambient temperature is low, it is easy to cause liquid refrigerant to deposit in the oil pool of the compressor. The existing compressor preheating control technology In general, a heating device is usually added to the compressor to evaporate the liquid refrigerant. Although the reliability of the start-up is improved, the cost of the air conditioning unit is increased. At the same time, if the temperature of the heating device is not properly controlled, the compressor may be damaged. less reliable

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