Energy-saving control method for variable-displacement compressor of air conditioner

Abstract

The invention provides an energy-saving control method for a variable-displacement compressor of an air conditioner. The energy-saving control method comprises the following steps: at least determining a target air-outlet temperature according to user settings and in-vehicle and out-vehicle temperatures; calculating the corresponding target refrigeration temperature according to the target air-outlet temperature in the non rapid-cooling demand mode, wherein the target refrigeration temperature is the difference value between the target air-outlet temperature and a refrigeration compensation temperature; updating the target refrigeration temperature to an ultimate refrigeration temperature in the rapid cooling mode and under the condition that the time in the rapid cooling mode exceeds the preset refrigeration demand magnetic hysteresis time; and achieving proportional integral calculation according to the acquired target refrigeration temperature and the actual refrigeration temperature to control the displacement of the compressor. The energy-saving control method enables the variation of in-vehicle temperature to be stable so as to obtain better users' experience; and the displacement of the compressor is controlled based on reasonable calculation used in regulation so as to reduce the power consumption of the running compressor and guaranteeing the energy-saving performance of the air conditioner to the maximum extent.

Description

technical field [0001] The invention relates to the control of a variable-displacement compressor of an air conditioner, in particular to an energy-saving control method of an externally controlled variable-displacement compressor of a vehicle-mounted air conditioner. Background technique [0002] The traditional automotive air-conditioning system uses a fixed-displacement compressor, and the air-conditioning controller controls the electromagnetic clutch to connect or disconnect the power connection between the compressor and the engine to perform refrigeration or stop refrigeration. [0003] This car air conditioner with a fixed displacement compressor operates at the maximum power consumption when it is working, and the air is excessively cooled after entering the evaporator. By controlling the position of the mixing damper, part of the air re-enters the heating core to increase the temperature. , the hot and cold air is mixed to reach the predetermined outlet temperature...

AI Technical Summary

Problems solved by technology

[0003] This car air conditioner with a fixed displacement compressor operates at the maximum power consumption when it is working, and the air is excessively cooled after entering the evaporator. By controlling the position of the mixing damper, part of the air re-enters the heating core to increase the temperature. , the hot and cold air is mixed to reach the predetermined air outlet temperature, so a considerable energy waste is caused in the cooling process of the air conditioning system

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