Speed adjusting method of motor compressor

Abstract

The invention is suitable for the technical field of car air conditioners, and provides a speed adjusting method of a motor compressor. The method comprises following steps: the motor compressor is driven, and an evaporation temperature sensor collects the temperature value in a car in a timing manner; the difference value delta T1 between the temperature value collected by the evaporation temperature sensor and the target temperature value is calculated, and the compensation rotating speed field of the delta T1 is obtained; the rotating speed compensation value corresponding to the compensation field is read; the difference value delta T2 between the pre-collected temperature value and the temperature value collected last time is calculated, and on the basis of the delta T2, the rotatingspeed compensation value is corrected; on the basis of the corrected rotating speed compensation value, the rotating speed of the motor compressor is controlled. Adjusting speeds of different compensation fields are set on the basis of the compensation field, the adjusting speeds are gradually reduced along with decreasing of the compensation field value, the condition that rotating speed suddenlychanges can be prevented wholly, in the compensation field, on the basis of the temperature descend range, the adjusting speed in the compensation field is subject to fine adjustment, and it is ensured that the temperature stably descends to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of automobile air conditioners and provides a method for regulating the speed of an electric compressor. Background technique [0002] The speed of the existing electric compressor is generally adjusted according to the temperature value collected by the evaporator temperature sensor. The evaporator temperature and the compressor speed have a one-to-one correspondence. The higher the evaporator temperature, the higher the speed. The lower the temperature of the evaporator, the lower the speed; with this control method, sudden changes in the speed are prone to occur, and in environments with different humidity, the speed of the electric compressor required for the same evaporator temperature is different. Therefore, the established evaporator The corresponding relationship between the temperature of the compressor and the speed of the compressor cannot well meet the needs of the working conditions. Contents...

AI Technical Summary

Problems solved by technology

[0003] An embodiment of the present invention provides a method for speed regulation of an electric compressor, which solves the problem that the traditional speed regulation method of an electric compressor is prone to a sudden change in speed

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