一般项目：热气机、能源动力装置、传动和驱动部件、船用配件、输配电及控制设备（除专项审批）、环保及节能专用设备、家用电器的研发、设计、生产、销售；海洋工程专用设备、低温工程设备的研发、销售；金属材料销售；专用化学产品销售（不含危险化学品）；机电设备安装；系统集成；并提供相关技术的技术开发、技术咨询、技术服务和技术转让；货物进出口；技术进出口。（除依法须经批准的项目外，凭营业执照依法自主开展经营活动）
ObjectiveThis paper aims to further enhance the vibration and noise reduction capabilities and address environmental adaptability issues of an air purifier in a closed cabin, which had undergone flow-channel optimization based on simulation analysis, while maintaining structural dimensions, power consumption, and ensuring functional performance (airflow rate and purification quality).MethodInitially, a small batch of prototypes with optimized flow channels was produced by selecting the best motor and improving dynamic balance precision, and prototypes meeting performance requirements were identified. Subsequently, the flow channel was further improved, blade size was reduced, and dynamic balance precision was enhanced to lower the vibration acceleration level (VAL) and sound pressure level (SPL). However, it was found that the compliance rate of motor vibration and noise was too low, and the prototype had environmental adaptability issues. Therefore, the motor was refined, the filter structure was altered, and the installation method was changed to further improve the prototype, followed by relevant testing. ResultsThe test results demonstrated that the refined motor significantly reduced the vibration and noise levels of the prototype. Integrating the filter structure with the purification airflow channel effectively decreased the vibration acceleration amplitude in the 1/3 octave band centered at the fundamental frequency. Specifically, the VAL (10 Hz−10 kHz) was reduced to below 104 dB, the SPL (20 Hz−20 kHz) was reduced to below 60 dB(A), and the vibration acceleration level in the 1/3 octave band centered at the fundamental frequency was reduced to below 90 dB. ConclusionThe improved air purifier for the closed cabin significantly enhanced the maintainability and safety during filter replacement operations and improved the vessel's stealth capabilities. The improved prototype met the requirements of the latest technical specifications and provided a basis for further improvement.
