A kind of electric vehicle defrosting control system and control method thereof
A control system, a technology for electric vehicles, applied in vehicle maintenance, vehicle cleaning, transportation and packaging, etc., can solve problems such as failure to meet defrosting requirements, energy waste, poor defrosting effect, etc., and achieve the goal of improving defrosting efficiency. Effect
Active Publication Date: 2021-02-23
SHANDONG UNIV
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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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[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0029] figure 1 Shown is a schematic flow chart of a defrosting control strategy for an electric vehicle according to an embodiment of the present invention. like figure 1 As shown, the electric vehicle defrosting control strategy includes the following steps:
[0030] S1: Detect the ambient temperature before defrosting.
[0031] S2: Calculate the preset time according to the detected temperature, and determine the hot air flow rate and the air outlet angle.
[0032] S3: Start defrosting, control the defrosting hot air temperature, hot air flow and flow direction, and perform in low temperature and large flow defrosting mode.
[0033] Specifically, the preset time is related to the detected ambient temperature, according to the detected ambient temperature T, wherein the first preset time: t 1 =5e sin∣T∣ , the unit is Celsius, and is a negative v...
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The invention discloses a defrosting control system for an electric vehicle and a control method thereof. The defrosting initial stage of the invention is a low-temperature and large-flow defrosting mode, which ensures that the hot air can evenly cover the entire defrosting glass area, and the temperature of the entire frost layer rises evenly; When the defrosting reaches the first preset time, the temperature of the hot air for defrosting increases, and the flow rate of the air outlet decreases accordingly while the defrosting power remains unchanged, and the angle of the air outlet is also adjusted accordingly. At this time, it is high temperature and medium flow defrosting Mode, the increase of the defrosting hot air temperature can make the frost layer in the field of vision melt quickly; when the defrosting is carried out to the second preset time, the temperature of the defrosting hot air decreases, the flow rate of the air outlet also decreases accordingly, and the angle of the air outlet is also adjusted accordingly , at this time, it is the low-temperature and low-flow defrosting mode. The defrosting at this stage mainly ensures that the frost layer on the edge of the glass can gradually melt without causing secondary frosting.
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 ...
Claims
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IPC IPC(8): B60S1/54
CPCB60S1/54
Inventor 闫伟张辉明李国祥王桂华王安冉张楠
Owner SHANDONG UNIV