Temperature control method and system for vehicle air conditioner

Abstract

The invention provides a temperature control method and system for vehicle air conditioners, and relates to the field of vehicle air conditioner control. The temperature control method includes: obtaining the evaporator outlet air temperature of the air conditioner; when the evaporator outlet air temperature is greater than the first preset temperature, matching the evaporator outlet air temperature with the value in the preset comparison table and outputting the same value as the evaporator outlet air temperature. The duty ratio corresponding to the wind temperature, wherein the duty ratio is a preset value, and the first preset temperature is greater than zero; the working speed of the compressor of the air conditioner is adjusted according to the duty ratio. In the above method and system, only one parameter of the evaporator outlet air temperature is introduced to determine the duty ratio. When the evaporator outlet air temperature is within a certain preset range, the corresponding duty ratio is a preset value. Instead of the value automatically calculated by the control system, in this way, when the temperature of the evaporator air outlet is high, a stable duty cycle can be used to control the operating speed of the compressor and increase the cooling speed.

Description

technical field [0001] The invention relates to the field of automobile air-conditioning control, in particular to a temperature control method and system for vehicle air-conditioning. Background technique [0002] With the development of society and the increasingly prominent issues such as energy and environmental protection, pure electric vehicles (new energy vehicles) have attracted more and more attention from all over the world due to their advantages of zero emission and low noise, and are called green vehicles. The traditional automotive air-conditioning controller can only start and close the electric compressor, and cannot adjust the output power of the compressor in real time according to actual needs, which will cause energy waste. [0003] With the development of technology, an air conditioner temperature control system that can adjust the output power of the compressor in real time already exists on the market. However, the above air conditioner temperature co...

AI Technical Summary

Problems solved by technology

However, the above-mentioned air-conditioning temperature control system has problems such as slow cooling speed in a high-temperature environment, and frequent startup and shutdown of the compressor when the air volume is low.

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