Experimental Study on the Cooling Performance of a Hybrid Vehicle Air Conditioning Compressor

To investigate the specific cooling performance of a hybrid compressor, this thesis carries out a cooling performance test study on it. The object of the study is a hybrid compressor under development, and several different structural solutions are proposed, and the better hybrid compressor structural solution is selected through the performance test in the automotive air conditioning compressor cooling performance test bench. The analysis of the performance test data shows that the hybrid compressor with an internal check valve diameter of 0.45 mm, a flow rate of 10 L, and a main shaft diameter of 14.99 mm as the structural scheme has better cooling performance. In addition, the hybrid compressor is compared with the electric compressor and the pulley-driven compressor under several same working conditions to evaluate the specific cooling performance of the hybrid compressor. The results of the performance comparison show that the energy efficiency ratio of the hybrid compressor is high at low speeds with direct motor drive. In hybrid mode, its best performance occurs around 3000-5000rpm. And when the speed exceeds 6000rpm, a decrease in the energy efficiency ratio occurs. Especially at the critical speed of 3000rpm when the hybrid compressor is converted from the direct motor drive mode to the hybrid mode, there will be a greater compressor power consumption compared to the pulley-driven compressor, but overall, the difference in the energy consumption ratio is within the acceptable range.