Transcritical CO2 system temperature and humidity self-adaptive dehumidification and defogging system and control method

Abstract

The invention discloses a transcritical CO2 system temperature and humidity self-adaptive dehumidification and defogging system and a control method. The system comprises a compressor, a defrosting heat exchanger, a main heat exchanger, an electronic expansion valve, an outdoor heat exchanger, two opening degree adjustable valves, an all-way throttle valve, a liquid storage device and two psychrometers. The opening adjusting valve and the all-way throttle valve are matched with the air conditioning system, so that the dehumidification function in the heating mode is achieved; in addition, three different dehumidification methods are provided for different air moisture contents, and multi-working-condition intelligent dehumidification is achieved; a double-heat-exchange system is adopted inan air conditioning system of an automobile, after heat exchange is conducted between a defrosting heat exchanger and compartment air inlet air, the air is directly blown to a front windshield of theautomobile through the windshield, and the purpose of demisting the windshield is achieved.

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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