关键词: 空调系统；NVH；隔振垫；管路延长

Abstract: With the continuous improvement of powertrain noise, vibration, harshness (NVH), road noise and wind noise of the vehicle, the NVH problem of the air conditioning system has become more and more prominent, and has been concerned and studied by the industry. This paper mainly diagnoses and analyzes the obvious "buzzing" sound in a vehicle under the creep condition of air conditioning, clarifies the generation and transmission mechanism of the "buzzing" sound of the air conditioning system, and puts forward optimization schemes such as engineering pipeline vibration isolation pad and pipeline extension according to the analysis results, which can effectively reduce the "buzzing" sound of air conditioning.

Key words: Air condition system; NVH; Vibration isolation pad; Pipeline extension