On April 19, the China Light Industry Federation held and presided over the scientific and technological achievements technical appraisal meeting of Xiaomi Smart Household Appliances (Wuhan) Co., Ltd. in Wuhan, Hubei Province, and jointly completed the scientific and technological achievements appraisal of the projects of "Research and Application of Key Technologies for Multi-scene Personalized Intelligent Control of Household Air Conditioners" and "Research and Application of Key Technologies for Anti-Flash Cooling Composite Defrosting of Household Inverter Heat Pump Air Conditioners". The members of the appraisal committee are all top professors and experts from the air-conditioning industry and universities, namely: Academician Li Peigen of Huazhong University of Science and Technology, President Liu Ting of China Household Electrical Appliances Research Institute, Professor Xu Dianguo of Harbin Institute of Technology, Professor Ding Guoliang of Shanghai Jiaotong University, Professor Shi Wenxing of Tsinghua University, Professor Huang Dong of Xi'an Jiaotong University, Professor Liu Jinping of South China University of Technology, Researcher Xie Junlong of Huazhong University of Science and Technology, Professor Zhou Xiang of Tongji University, and Deputy Secretary-General Dou Yanwei of China Household Electrical Appliances Association.
Shan Lianyu, general manager of Xiaomi's major appliances, delivered a speech and introduced the technical development status of air conditioners, and technical representatives Wu Junhong, Liao Min and Cui Songlin made a detailed project report to the experts of the appraisal committee and organized to watch the prototype live demonstration. After questioning and discussion, the experts of the appraisal committee agreed that the technical achievements of the two projects are remarkably innovative, have reached the international leading level, and are leading to the personalized, convenient and intelligent development of air conditioning technology.
The key technology of multi-scene personalized intelligent control allows air conditioners to be "thousands of people"
Based on the research and application of key technologies for multi-scene personalized intelligent control of household air conditioners, Xiaomi has proposed three innovative technologies: "differentiated control technology based on WiFi positioning and meteorological linkage", "adaptive control technology for air conditioning based on room load perception algorithm" and "personalized and convenient control technology based on user habits and preferences".
The industry's first differentiated control technology based on WiFi positioning and meteorological linkage, which can use meteorological linkage technology to obtain the outdoor meteorological temperature and detection temperature of the corresponding area when the air conditioner is running, and participate in the operation and control of the air conditioner. Through feature extraction and decision tree modeling, the problem of air conditioning installation environment and poor ventilation was identified, with an accuracy of 94.35%. At the same time, it also has self-optimizing control technology to ensure the operational reliability and heat exchange performance of the air conditioner, and the refrigeration capacity can be increased by 23.7% under the same working conditions.
In order to solve the problem of poor adaptability to complex and changeable scenes, Xiaomi has specially developed an adaptive control technology for air conditioning based on room load perception algorithm. Through the user setting, weather changes, regions, seasonal factors, air conditioning operation parameters and other data of the air conditioner as the model features, the air conditioning room load prediction model is constructed, and the room load interval identification accuracy reaches 99.78%, and the air conditioning frequency is corrected through the model, the refrigeration temperature drop overshoot can be improved by 1.1°C, and the initial power consumption of refrigeration is reduced by 26.3%, making the user's body feel more comfortable.
Based on the concept of personalized and convenient control of air conditioners, Xiaomi has developed a personalized and convenient control technology based on user habits and preferences based on the analysis and research of a series of problems caused by the difference in user habits and preferences. Combined with the weather and IoT linkage to obtain air conditioning information, the user preference recognition ability of air conditioners has been deeply strengthened, and the AI decision-making and intelligent control capabilities of air conditioners have been greatly improved.
Anti-flash cooling compound defrosting technology to care for users in a warm winter
In view of the pain points of users, Xiaomi's anti-flash cooling compound defrosting technology innovation adopts non-reversing defrosting to solve the problem of frosting and room temperature quenching of external machines. Among them, the three leading technologies are "multi-actuator coupling control anti-quenching defrosting technology", "flexible defrosting control technology linked to local meteorological parameters", and "self-monitoring and reliable defrosting control technology for bad weather operation status", which can realize no heat absorption from the room during defrosting, and the room temperature drop can be reduced by up to 70%, and normal heating can be resumed immediately after defrosting.
Based on the principle of circulating defrosting with low pressure loss of refrigerant, Xiaomi has pioneered the "multi-actuator coupling control anti-flash defrosting technology", which achieves efficient defrosting and reduces room temperature drop through the dual flow curve electronic expansion valve, combined with the flow control of defrosting refrigerant and the efficient distribution algorithm of defrosting heat. The innovative high-efficiency heat allocation control technology of hot fluoride defrosting can shorten the defrosting time by up to 75% compared with traditional technology under low temperature and high humidity conditions, achieving a rapid return to normal heating, and greatly improving the comfort experience.
Xiaomi's anti-flash cooling compound defrosting technology not only does not reverse, but also makes it more intelligent. For the first time, the "flexible defrosting control technology linked to local meteorological parameters" is adopted, which can obtain a more accurate state of the whole machine under the condition of linkage meteorological parameters, adaptively adjust the defrosting control parameters, select the best time to enter and exit the defrosting, and greatly improve the comfort of air conditioning defrosting.
The industry's first "self-monitoring and reliable defrosting control technology for severe weather operation status" ensures that the compressor runs reliably and cleanly defrosts in harsh weather scenarios, and does not remutate defrost in non-bad weather scenarios, improves heating comfort, and achieves a comfortable and reliable balance design.
Xiaomi defines the era of intelligent air conditioning 2.0 and develops its own "Lingyun Intelligent Control Engine" to lead AI intelligent control
In the past two years, Xiaomi has made a number of breakthroughs in the international leading technology of intelligent air conditioning, whether it is the key technology of multi-scene personalized intelligent control, or the realization of the key technology of anti-quenching compound defrosting, it is inseparable from the blessing of Xiaomi's AI capabilities. Shan Lianyu, general manager of Xiaomi's major appliances, said: "The intelligent process of air conditioning can be roughly divided into three stages, the traditional air conditioning era controlled by remote control, the intelligent 1.0 using APP/device linkage, and the intelligent 2.0 realized by AI intelligent control. Smart 1.0 is only the basis of intelligent air conditioning, it is the ability that Mijia air conditioning has since its birth, our 24-year-old new products will fully enter the era of smart 2.0, the most significant feature is to use AI to achieve active intelligence. In the future, air conditioners that are intelligently controlled by AI can be called smart and good air conditioners. ”
Carrying the AI intelligent control capability of air conditioners, Xiaomi has developed its own "Lingyun Intelligent Control Engine" to comprehensively improve the intelligent experience of air conditioners from three aspects: perception, decision-making, and control. Mi Home air conditioners with AI capabilities can save up to 40% of the energy by AI, and at the same time achieve the optimal solution of energy consumption control and comfortable experience. According to the user's preferences, AI can achieve multi-dimensional perception and intelligent decision-making through deep learning models, which will not only be more comfortable to use, but also use more and more intelligently, and the more you use it, the more you understand you.
At present, the Mijia Air Conditioner Pro series, which is fully equipped with Xiaomi's "Lingyun Intelligent Control Engine", is now on sale, and the new Mijia Air Conditioner dual outlet cabinet series is also open for appointment at the same time. Mi Home Air Conditioner is opening the era of intelligence 2.0 with AI capabilities and leading the future development of intelligent air conditioning.