High-efficiency electric compressor rotating speed control method based on evaporator temperature control

Abstract

The invention relates to a high-efficiency electric compressor rotating speed control method based on evaporator temperature control. The method comprises the following steps: establishing a numerical simulation model through existing whole vehicle cooling and air-conditioning system bench test data, inquiring meteorological data, performing numerical simulation on typical environment working conditions and typical use working conditions in spring, summer and autumn, and correcting the numerical simulation model; according to the evaporator temperature change rule within a certain time T before and after operation of the air conditioner under all working conditions of the whole vehicle, establishing the relation between the evaporator temperature and the whole vehicle load, and determining the initial compressor rotating speed and the follow-up evaporator target temperature; and according to the given target temperature of the evaporator, adjusting the rotating speed of the compressor, and stabilizing the actual temperature of the evaporator within the specified range of the target temperature of the evaporator. The method has the beneficial effects that: on the premise that the hardware cost is not increased, the rotating speed control advantage of the electric control compressor is fully played, so that the running characteristics of the system efficiently meet the real-time load requirement of the whole vehicle.

Description

technical field [0001] The invention relates to the field of compressor control, in particular to a high-efficiency electric compressor speed control method based on evaporator temperature control. Background technique [0002] With the deepening of the electrification process of the whole vehicle, more and more air-conditioning system platforms for fuel vehicles need to be considered. In the process of "oil-to-electricity", the compressor is switched from the direct mechanical drive of the original engine through the transmission belt to the electric drive of the controller. question. The speed of the traditional automotive air-conditioning compressor changes with the engine speed, and the control is simple, but precise control cannot be achieved. In the process of "oil to electricity", higher requirements are put forward for the control of electric air-conditioning compressors, but at the same time it brings room for system optimization and improvement. The current elect...

AI Technical Summary

Problems solved by technology

The control of the former is too simple, while the system of the latter is too complex, requiring higher cost input, but it has not further improved the efficiency, comfort and intelligence of its control method

[0003] Generally, when the electric compressor runs at a fixed speed, the vehicle air conditioner has poor operating comfort, high energy consumption, and increased mileage anxiety; when the variable speed operation is often due to the lack of sunlight intensity signals and the disadvantages of compensation algorithms, even if the local complexity of the system is increased (additional increase ambient temperature sensor, etc.), and failed to give full play to the advantages of electronically controlled compressor speed control to make the system operating characteristics efficiently match the real-time load demand of the vehicle

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