a transcritical co 2 System temperature and humidity adaptive dehumidification and demisting system and control method

Abstract

The invention discloses a transcritical CO 2 System temperature and humidity adaptive dehumidification and demisting system and control method, the system includes a compressor, a defrosting heat exchanger, a main heat exchanger, an electronic expansion valve, an outdoor heat exchanger, two opening adjustable valves, and a full-pass joint flow valve, reservoir, and two wet and dry bulb thermometers. The invention utilizes the opening regulating valve and the full-pass throttle valve to cooperate with the air-conditioning system to realize the dehumidification function in the heating mode, and proposes three different dehumidification methods for different air moisture contents to realize multi-working-condition intelligent dehumidification ;In the air-conditioning system of the car, a double heat exchange system is adopted. After the defrosting heat exchanger is used to exchange heat with the air in the compartment, it is directly blown to the front windshield of the car through the windshield to achieve the effect of defogging the windshield. Purpose.

Description

technical field [0001] The invention belongs to the field of transcritical carbon dioxide systems, in particular to a transcritical CO 2 System temperature and humidity adaptive dehumidification and demisting system and control method. Background technique [0002] New energy vehicles overcome the dependence on fossil fuels of fuel vehicles, with diversified energy utilization, quietness and environmental protection, representing the trend of future automobile development. New energy vehicles are different from fuel vehicles. Under low ambient temperature, there is no waste heat from the engine that can be used to heat the cabin air. Therefore, current pure new energy vehicles basically use PTC electric heating for heating in winter. However, the battery storage capacity of pure new energy vehicles is limited. , the use of electric heating heating is bound to affect the driving range of the car. The heating coefficient of the heat pump air conditioning system is above 1. C...

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Problems solved by technology

[0003] And because the environment is changeable during the driving process of the car, and it encounters severe traffic jams, rain, snow, and heavy fog, so the new energy vehicle air conditioner only realizes the two functions of heating and cooling, which is far from meeting the actual requirements. When the ambient temperature is high or in rainy weather, the relative humidity of the air is greatly increased, and the front windshield of the car is prone to fogging during driving, which affects the driving visual range, greatly reduces driving safety, and increases the risk of traffic accidents. possibility

[0004] At present, the existing transcritical carbon dioxide automotive air conditioning system has been facing the problem of inability to achieve dehumidification in heating mode and the inability to directly defog the front windshield, let alone further solve the problem of achieving the corresponding requirements according to the actual ambient temperature and air humidity. The problem of dehumidification

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