Electric automobile energy-saving air-conditioner based on semiconductor refrigeration and control method thereof

Abstract

The invention discloses a control method of an electric automobile energy-saving air-conditioner based on semiconductor refrigeration. A plurality of semiconductor refrigeration slice sets are arranged in the electric automobile energy-saving air-conditioner. The method includes the steps that S1, when the actual temperature of the interior of an automobile greatly differs from a set temperature and the temperature change rate is larger than a first preset value or when the automobile is started, the semiconductor refrigeration slice sets are started one by one until all the semiconductor refrigeration slice sets are started completely, and the starting time interval between every two semiconductor refrigeration slice sets is 1-5 seconds. The electric automobile energy-saving air-conditioner based on semiconductor refrigeration enables semiconductor refrigeration equipment to work stably and to be switched quickly in a heating mode and in a refrigeration mode conveniently, and is small in energy consumption. Meanwhile, the invention provides the control method of the electric automobile energy-saving air-conditioner.

Description

technical field [0001] The invention relates to the field of vehicle-mounted air conditioners, in particular to an energy-saving air conditioner for electric vehicles based on semiconductor refrigeration and a control method thereof. Background technique [0002] Electric energy is the most precious resource of pure electric vehicles, and the energy consumption of air conditioners is one of the important factors restricting the mileage of pure electric vehicles. Regardless of whether electric air conditioners or heat pump air conditioners are used in pure electric vehicles, the mileage of the vehicle is about 40% when the air conditioner is in use. Therefore, reducing the energy consumption of air conditioners is one of the most important technical problems to be solved for pure electric vehicles. Semiconductor refrigeration technology has been widely used due to its simple structure and low energy consumption. However, due to the power limitation of semiconductor refrigerat...

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Problems solved by technology

Semiconductor refrigeration technology has been widely used due to its simple structure and low energy consumption. However, due to the power limitation of semiconductor refrigeration chips and the large cooling power of automotive air conditioners, the application of semiconductor refrigeration to pure electric vehicles has become more complicated. The main performance In: 1. The cooling capacity of a single cooling plate is small, and it must be used together in multiple or more than a dozen combinations, which greatly increases the volume and complicates the simple structure; 2. The power used in combination is large, and the starting current is large, up to 100 More or even hundreds of amperes, the impact on the vehicle grid is large when starting, which not only affects the normal operation of other parts of the vehicle, but also increases the safety of the vehicle; 3. Defrost requires additional heating elements, increasing the consumption of electric energy; 4. . When the temperature in the car has reached the set temperature, the semiconductor air conditioner is still working at a higher power, which increases the power loss; 5. When the temperature in the car reaches the set temperature, the semiconductor refrigerating sheet will start and stop frequently. The current impacts the power grid and reduces the safety of the vehicle; 6. Although the semiconductor refrigeration sheet can switch the polarity of the power supply to switch the cooling and heating ends, the temperature of the cold end and the hot end of the semiconductor refrigeration sheet must reach Room temperature or basically balanced, otherwise it will cause damage to the cooling plate, so it is not recommended to use direct conversion of power polarity to switch cooling and heating terminals when using semiconductor air conditioners in cars

Therefore, although there are more semiconductor refrigeration and air-conditioning technologies for automobiles, they have not been really applied to automobiles.

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