Multi-split oil return control method and multi-split air conditioner with same

Abstract

The invention provides a multi-split oil return control method. The method is characterized in that the daytime oil return mode and the night oil return mode are adopted; only when the requirements are met that the continuous operation time of a compressor is longer than a preset value, operation loads of a unit are within a preset load range, the operation frequency of the compressor is within the preset frequency range, the ratio of the outdoor environment temperature of the air conditioner operated in daytime to the outdoor environment temperature of the air conditioner operated at night issmaller than 1, is the night oil return mode executed; otherwise, the daytime oil return mode is executed. According to the technical scheme, the problems that when the unit is operated at night under the small load condition, the indoor temperature changes rapidly due to frequent oil return, the comfort becomes poor, and the power consumption is high are solved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a multi-connected air conditioner equipped with a multi-connected oil return control method. Background technique [0002] With the improvement of living standards, household multi-splits have gradually entered people's lives. Compared with upward-winding multi-splits, side-ventilated multi-splits have the characteristics of compact structure, easy installation, and are suitable for use in homes and small commercial places. In recent years, they have been widely used. Active in various small household places, widely loved and favored by users. For household multi-split machines, the installation position is generally the same as that of ordinary split machines, and its requirements for noise and comfort are higher. At present, users generally use 1-2 internal units when the multi-split unit is running at night. Relatively speaking, the operating load of the unit is smal...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a multi-line oil return control method, which can solve the problems of rapid changes in indoor temperature difference, poor comfort and high power consumption caused by frequent oil return when the unit is running at night with a small load. of:

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