MayAir has been deeply involved in the field of domestic high-end air purification technology for 20 years. With 16 core technologies and 76 patents in the fields of semiconductor & biological clean room air purification, indoor air quality optimization, and atmospheric environmental emission control, it has successfully been awarded the third batch national-level special expertise new "little giant" enterprises.

In order to improve the work efficiency of medical staff during the pandemic, the Jiangsu Environmental Protection Industry Association coordinated some disinfection machine manufacturers in the province to donate disinfection machines to several major hospitals in Nanjing, this can avoid the suspension of the work of the medical staff due to the spraying of disinfectants.

On July 26, MayAir with its strong strength, excellent professional technology and excellent service reputation in the field of clean air for many years, stood out from many competitors and successfully won the bid for Wuhan Huaxing T4 chemical filter procurement project in 2021. The development and construction of the electronics industry has contributed to the development.

Table 2 is an example of the deployment scheme of chemical filter for fresh air and FFU chemical filter. The target AMC is inorganic acid. Assuming that the outdoor concentration is 30 μ g/m3, the chemical filtration coverage rate is 50%, and the internal generation source is 10 μ g/m3, it is necessary to meet the concentration requirements of ITRS for the clean room air and wafer environment of lithography scanner, which are 5ppb and 0.05 ppb respectively. Through the automatic simulation calculation tool by MayAir, the influence of chemical filtration coverage on chemical filtration efficiency, replacement cycle and annual consumption can be simulated. According to the following example, if the chemical filtration coverage rate ≤30%, it cannot meet the environmental concentration requirements. When the coverage rate reaches 40%, it needs to increase the termination filtration efficiency to 90% to meet the environmental concentration requirements. It is a more reasonable deployment when the coverage rate is around 50%-75%. When the coverage is increased to 100%, which means the deployment is too high, it will increase the annual consumption of chemical filtration material.

Since September 2020, China has tabled the goal of carbon peaking by 2030 and carbon neutrality by 2060 at the 75th United Nations General Assembly. The Government has proposed a series of measures to promote the realization of this goal. As a company that dedicates on high-level purification, MayAir actively supports the national policy of carbon neutrality as part of its social responsibility initiatives. We have invested a lot in manpower and resources for applying various filtration technologies in the industrial manufacturing activities, in order to control and treat the dust pollution yet energy saved and carbon emissions reduction.

Operating room (O.R) is a place to provide operation and rescue for patients, and it is the core area of infection control in hospitals. According to the definition of Architectural technical code for hospital clean operating department (GB50333-2013), the traditional clean operating rooms are divided into four classes, as shown in the following table:   clean room class Airborne /depositing bacterial concentration Air cleanliness class Reference for operation Operating zone Surrounding zone Operating zone Surrounding zone I 0.2cfu/30min ·φ90皿（5cfu/m3）  0.4cfu/30min ·φ90皿（10cfu/m3） 5 6 Prosthesis implantation, some large organ transplantation, and these operations the infections of which can directly endanger life and quality of life II 0.75cfu/30min ·φ90皿（25cfu/m3） 1.5cfu/30min ·φ90皿（50cfu/m3）   6 7 Large-scale surgery involving deep tissues and major organs of life III  2cfu/30min ·φ90皿（75cfu/m3） 4cfu/30min ·φ90皿（150cfu/m3）   7 8 Other surgical procedures IV 6cfu/30min·φ90皿（175cfu/m3） 8.5 Infection and heavily contaminated surgery    The cleanliness class of the operating room is closely related to the efficient and safe air cleaning system in the operating room. The air cleaning system can not only ensure the sterile environment, but also prevent cross-infection of personnel and play an important role in the success of the operation. It is an indispensable key supporting system in the operating room. According to traditional theory, the air supply units in clean operating room should have two basic functions: one is to quickly replace all polluted air in the operating zone with dust-free sterile air to ensure the cleanliness and sterility of the operating zone; the other is to prevent the unclean air outside the air supply flow from penetrating into the operating zone. Moreover, the temperature and humidity control of air supply in the operating room can ensure the surgeons to operate in a comfortable environment. However, since the air supply in the traditional operating rooms is sent at the unchanged temperature and speed, it is difficult to improve the anti-interference ability of air flow, so patients may have hypothermia. MayAir focuses on the development of high-end air cleanness technology in China. In order to make up for the deficiencies of traditional air supply and cleanness units, our professional R&D team, under the guidance of Professor Shen Jinming and Professor Liu Yanmin of Tongji University, has developed a special air supply system with wide outlet air curtain for low-speed airflow, which can provide different temperature and air speed at the same time, in operating rooms. The air supply system with wide outlet air curtain for low-speed airflow, which provides different temperature and air speed at the same time, is a new mode of air supply. Using wide outlet air curtains at two sides to supply low speed airflow, the units can keep the main air flow in the air outlets in the center. In additional to the dust-free and sterile control, the air flow from air curtain at the side can envelope around the operating table to meet the surgeon's comfort, while main air flow covers the patients which helps adjust the body temperature to keep them from hypothermia. According to the need of operation, the air curtain on both sides and the main air supply system in the center of the units can be combined by different sizes, speeds and temperatures in different operating rooms. Computational fluid dynamics (CFD) was used to simulate the temperature field for combinations of air supply units with wide outlet air curtain for low-speed airflow in operating room, and to analyze the influence on the comfort of operators and patients. Vertical section of doctor station 　　Longitudinal section of patient in lying position 　　Horizontal Section of doctors and patients The air supply system with wide outlet air curtain for low-speed airflow which provide different temperature and air speed at the same time can be used in operating room with cleanliness class I and II. Enhancing the anti-interference ability of clean air flow in operating room, ensuring clean and sterile area, and meeting the temperature and humidity requirements of doctors and patients, it is a technology with independent intellectual property rights. More importantly, with the cleanness air supply system of AC, air supply system with wide outlet air curtain for low-speed which provide different temperature and air speed at the same time can realize positive and negative pressure switching in the operating rooms, and effectively protect the safety of doctors, p