Air conditioner heating oil return control method and device and air conditioner

Abstract

The invention provides an air conditioner heating oil return control method and device and an air conditioner, and relates to the technical field of air conditioners. The air conditioner heating oil return control method comprises the following steps: under the condition that the air conditioner operates in a heating mode, obtaining oil return accumulated time of the air conditioner, wherein the oil return accumulated time represents accumulated time when the air conditioner operates in an oil shortage state of a compressor; obtaining an indoor environment temperature and a target indoor environment temperature set by a user; calculating a difference value between the target indoor environment temperature and the indoor environment temperature to obtain heating temperature difference; and controlling whether the air conditioner enters oil return operation or not according to the accumulated oil return time, the heating temperature difference and the current heating operation state of an indoor unit. According to the air conditioner heating oil return control method and device and the air conditioner provided by the embodiment of the invention, when oil return is needed during heating operation of the air conditioner, proper oil return time can be selected, influence of oil return on the heating effect is reduced, and the heating effect of the air conditioner is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to an air conditioner heating oil return control method and device and an air conditioner. Background technique [0002] During the operation of the compressor, the compressor lubricating oil plays the role of lubrication, cooling and cleaning. When the compressor is short of oil for a long time, it will cause the compressor to wear out and the motor to burn out. During the operation of the air conditioner, a part of the compressor lubricating oil circulates in the air conditioner system along with the refrigerant. The flow effect is mainly affected by the flow rate of the refrigerant. When the compressor operates at a low frequency, the circulation flow of the system is small, and the flow rate of the refrigerant decreases. The lubricating oil in the refrigerant is affected by gravity and deposits in the air conditioner heat exchanger, gas fraction, pipeline and...

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Problems solved by technology

[0004] The air conditioner heating oil return control method, device and air conditioner provided by the embodiments of the present invention solve the problem that the heating oil return causes the indoor unit to have no heating output for a long time, which easily causes the indoor temperature to drop significantly and seriously affects the heating effect

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