【目的】解决鳜鱼养殖过程中全自动增氧机的密封、安装不便等问题。【方法】2014年7月至11月，在鳜鱼养殖的整个周期中，对该机具的清洗周期、测量精度、控制可靠性展开鱼塘试验，研究长期使用该机具对养殖水质和用电量的影响。通过改变O形密封圈与三角沟槽的尺寸提高溶解氧传感器的密封性和安装便利性，通过改变上、下盖的倒角尺寸提升溶解氧传感器的安装便利性。【结果】在整个养殖过程中，与丹麦OxyGuard溶解氧测控仪相比，全自动增氧机平均清洗周期相差不大，温度测量误差为±0.8℃，溶解氧含量测量误差为±0.6 mg·L-1，调控的鱼塘溶解氧含量均大于设定的溶解氧含量下限值(4 mg·L-1)。同时，与手动控制增氧机的鱼塘相比，使用全自动增氧机的鱼塘溶解氧含量较高，最高达 7 mg·L-1，且水质参数中平均氨氮含量低35.9%，平均亚硝酸盐含量低50.7%，节约用电29.5%。【结论】该机具长期使用时，具有抗污性强、清洗方便、改善水质、节能省工的优点，可满足鱼塘养殖的实际要求，且密封好、安装方便，具有大面积推广的实用价值。
【Objective】To provide solutions for sealing and installation inconvenience of the automatic aerator during breeding of mandarin fish. 【Method】Through the whole cycle of mandarin fish breeding starting from July to November in 2014, fishponds tests were performed to study the cleaning cycle, measuring accuracy and controlling reliability of the automatic aerator. The impacts on aquaculture water quality and electricity consumption were evaluated. The sizes of the O-shape sealing ring and the triangle slot were changed to improve the sealing and installation convenience of the dissolved oxygen (DO) sensor. The sizes of the upper and lower chamfers were also changed to improve the installation convenience of the DO sensor. 【Result】During the whole breeding cycle, the average cleaning cycle of the automatic aerator was not significantly different compared with the Denmark OxyGuard DO monitor. The error of measured temperature was ±0.8 ℃, the error of measured DO content was ±0.6 mg·L-1, and the DO content of the controlled fishpond was higher than the set lower limit of 4 mg·L-1. Compared with manual control, the DO content of the controlled fishpond using the automatic aerator was higher with a peak value of 7 mg·L-1, the average ammonia nitrogen content in water was 35.9% lower, the average nitrite content was 50.7% lower, and the electricity was saved by 29.5%.【Conclusion】The automatic aerator is highly resistant to stain, can be conveniently cleaned, improves water quality and saves electricity during long-term use, meeting the requirements of the fishpond management. The automatic aerator has good sealing and can be conveniently installed, thus it is recommended for large-scale popularization.