As the automotive industry transitions from fuel vehicles to electric vehicles, air conditioning systems have also undergone a significant transformation. This article will explore the new energy of air conditioning compressors for electric vehicles, as well as their technological advances in refrigeration and heating.

New energy of air conditioning compressor

Due to the lack of a traditional engine, the air conditioning compressor of an electric vehicle needs to be driven by an electric motor. Compared with traditional fuel vehicles, the heat dissipation demand of electric vehicles is greater, and air conditioning compressors are required to participate in the heat dissipation process of batteries, motors and other components.

However, in the high temperature environment, the air conditioning system of electric vehicles faces the problem of increasing pressure, resulting in poor cabin cooling effect. In terms of heating, due to the high energy conversion efficiency of electric vehicles, recycling waste heat for heating becomes more difficult.

Air conditioning heating technology

The initial electric vehicle uses PTC heating method, but the energy consumption is high, which affects the endurance. At present, medium and high-end electric vehicles generally use heat pump air conditioning combined with PTC assisted systems. The heat pump air conditioner realizes the switching of cooling and heating modes through the reversing valve and other equipment, and can recover the waste heat of batteries, motors and other components.

The existing heat pump air conditioning system is divided into three types: steam compression type, jet air supplement type and waste heat recovery type. By improving the performance of the system, the heating efficiency is improved. Waste heat recovery further utilizes the low temperature heat of the core components.

Electric vehicle compressor development and opportunities

As the electric vehicle platform voltage increases, the power demand for air conditioning compressors also increases. The compressor needs to be integrated into the vehicle high voltage system, and the use of SiC power devices to improve efficiency, especially in light load situations, SiC MOSFET conduction loss compared to silicon IGBT is lower, efficiency improvement is more obvious.

The development of electric vehicles has brought new opportunities for the air conditioning compressor industry. Traditional home appliance giants such as Midea and Hisense are accelerating the layout of products for electric vehicle applications and have achieved mass production.

Brief summary

The new energy of electric vehicle air conditioning compressor is not only the embodiment of technological progress, but also a new opportunity for industrial development. With the continuous maturity of technology and the improvement of the industrial chain, the electric vehicle air conditioning system will be more efficient and energy-saving, and bring better driving experience to users.

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