Electric vehicle defrosting control system and control method thereof

Abstract

The invention discloses an electric vehicle defrosting control system and a control method thereof. The initial stage of defrosting is low-temperature high-flow defrosting mode so as to guarantee that hot air can uniformly cover the whole defrosting glass area and the temperature of the whole frost layer uniformly rises; after the defrosting is carried out for a first preset time, the defrosting hot air temperature is increased to guarantee that the flow of an air outlet is correspondingly reduced while the defrosting power is invariable, the angle of the air outlet is also correspondingly adjusted, the defrosting is in a high-temperature medium-flow defrosting mode at the moment and the defrosting hot air temperature is increased so that the frost layer of a vision zone is very rapidly melted; and after the defrosting is carried out for a second preset time, the defrosting hot air temperature is reduced, the flow of the air outlet is also correspondingly reduced, the angle of the air outlet is also correspondingly adjusted, the defrosting is in a low temperature low-flow defrosting mode at the moment, and the defrosting in this stage is mainly used for guaranteeing that the frost layer at the edge part of the glass can be gradually melted and secondary frosting cannot be caused.

Description

technical field [0001] The invention relates to an electric vehicle defrosting control system and a control method thereof. Background technique [0002] During the cold winter in the north, frosting on the front windshield of a car is a common problem, especially the frost layer in the driver's field of vision, which directly affects the safety of the car during driving. The traditional automobile defrosting system utilizes the waste heat of the engine cooling circulating water to be introduced into the heat exchanger, and the introduced air is heated and then sent to the defrosting air duct to defrost the windshield. However, with the application of pure electric vehicles and hybrid vehicles, there is no engine or enough engine waste heat to heat the cold air, and in the cold winter in the north, the car needs to be defrosted before starting, so it is necessary to use a defrosting system containing an electric heater. The frost unit defrosts. [0003] In the traditional ...

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Problems solved by technology

[0003] In the traditional defrosting process, the hot air temperature and hot air flow remain unchanged. When the energy consumption is low, that is, the defrosting temperature is low or the flow rate is low, the defrosting effect is poor, and the defrosting time is not as long as the defrosting requirement. In order to obtain a good The defrosting effect, when the temperature and flow of the defrosting air flow are too large, it causes a waste of energy

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