Vehicle air conditioner fresh air ventilation door energy-saving control method and system

Abstract

The invention discloses a vehicle air conditioner fresh air ventilation door energy-saving control method and system. According to the method, the environment temperature outside a carriage is measured after a vehicle air conditioner is started at first, a fresh air ventilation door is opened continuously if the environment temperature is within a set range, and a calculated value of the carbon dioxide concentration in the carriage is calculated and compared with a set value of the carbon dioxide concentration when the environment temperature is not in the set range; and when the calculated value of the carbon dioxide concentration is smaller than the set value of the carbon dioxide concentration, the fresh air ventilation door is closed and reopened when the requirements are met. The vehicle air conditioner can be automatically switched to be in an air return mode when the outside air temperature is high than the set range, the vehicle fresh air thermal load is lowered, defogging is achieved through the method that all return air is cooled and dehumidified through an indoor evaporator and then heated in the season for congealing fog, energy loss caused by opening of the fresh air ventilation door due to defogging is avoided, and a sensor is used for judging the time of the fresh air ventilation door have to be opened, so that the opening time of the fresh air ventilation door is shortened, energy consumption of the vehicle air conditioner is obviously reduced, and the endurance mileage is increased.

Description

technical field [0001] The invention relates to a technology in the field of automobile air conditioning, in particular to an energy-saving control method and system for a fresh air damper of an automobile air conditioner. Background technique [0002] Automobile air conditioner is the most energy-consuming auxiliary facility in automobiles, and its peak power consumption can be equivalent to the input power of the engine. Usually, in order to ensure the air quality in the car, the fresh air damper of the car air conditioning system (HVAC) is generally set to the fresh air mode, and the air conditioner continuously obtains air from the outside for adjustment to maintain the comfort of the car environment, but this will cause a lot of fresh air load. The fresh air load of the air conditioner can account for more than 30% of the total load, up to 80% at the most, which consumes a lot of energy and obviously shortens the battery life of the car. Contents of the invention ...

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Problems solved by technology

[0003] Aiming at the defects of poor air quality caused by the breathing of passengers in the car in the prior art internal circulation mode, which is not conducive to the health of passengers and ride comfort, the present invention proposes an energy-saving control method and system for fresh air dampers of automobile air conditioners

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