Honeywell mining virus

1. Hello, these two models are cup-shaped st masks. H801 has no valve, while h801v has valve.

2. Zhang Gong, senior environmental manager of Shijiazhuang bihao Environmental Protection Engineering Co., Ltd., a designated formaldehyde removal enterprise in Shijiazhuang, explains to you what the fresh air system is. The principle of the fresh air system is to supply fresh air to the room with special equipment deployment on one side of the closed room, and then crowd out the room with special equipment deployment on the other side, The principle of "fresh air activity field" will be formed indoors, so as to satisfy the necessity of indoor fresh air exchange. The implementation plan is: to accept the high-pressure head, high-speed brushless motor with large flow and small power flow, mobilize the centrifugal fan, rely on the strong force of the machine to supply air from one side to the room, and use the specially planned exhaust fresh air fan to crowd out from the other side to force the formation of fresh air activity field in the system. At the same time of air supply, fresh air into the indoor atmosphere is filtered, disinfected, sterilized, oxygenated and preheated (winter). When the exhaust air passes through the main engine, it exchanges with the fresh air to receive most of the energy and send it back to the room through the fresh air. Using the scheme of clean space formed in a large scope to ensure that the indoor atmosphere is clean. In order to achieve the goal of indoor atmosphere purification environment. 2、 The main advantage of fresh air system is: 1) you can enjoy the strange atmosphere of nature without opening windows; 2) Stop "air conditioning disease"; 3) Prevent indoor furniture and clothing from getting moldy; 4) Remove the harmful gas released after interior decoration, which is concive to human health; 5) Adjust indoor humidity, save the cost of getting warm; 6) Useful to remove indoor bacteria, viruses. 7) Super quiet three, the important function of fresh air system first, with the strange outdoor atmosphere to update the indoor air polluted by living and living process, in order to keep the indoor air cleanliness to a certain minimum level. The second effect is to increase heat dissipation in the body and prevent restlessness caused by moist skin. This kind of ventilation can be called thermal tranquility ventilation. The third effect is to cool the building components when the indoor temperature is higher than the outdoor temperature. This kind of ventilation is called building cooling ventilation. 4、 Basic example of fresh air system 1. One way fresh air system one way fresh air system is a diversified ventilation system formed by the combination of mechanical exhaust and natural air intake based on the three principles of mechanical ventilation system. It is composed of fans, air inlets, exhaust outlets and various pipes and pipes. The fan installed in the ceiling is connected with a series of exhaust outlets through pipes. The fan starts. The turbid indoor atmosphere is pushed out of the room through the suction outlet installed in the room. Several useful negative pressure areas are formed in the room. The indoor atmosphere continuously moves to the negative pressure area and pushes out of the room, The outdoor strange atmosphere is continuously supplemented by the air inlet above the window frame (between the window frame and the wall), so that you can constantly breathe the strange atmosphere of high quality. The air supply system of the fresh air system does not need the connection of the air supply pipe, but the exhaust pipe is usually placed in the corridor, toilet and other places with ceiling, which basically takes up no extra space. 2. Bidirectional fresh air system bidirectional fresh air system is an intermediate mechanical air supply and exhaust system based on the three principles of mechanical ventilation system, and is a useful supplement to unidirectional fresh air system. In the plan of two-way flow system, the location of the main exhaust fan and the indoor exhaust outlet is basically the same as that of the one-way flow diffusion. The difference is that the fresh air in the two-way flow system is delivered by the fresh air main engine. The fresh air host is connected with the indoor atmosphere diffuser through the pipeline. The fresh air host continuously sends the outdoor fresh air into the room through the pipeline, so as to satisfy the strange and quality atmosphere that people need for ordinary survival. Both exhaust outlet and fresh air outlet are equipped with air volume regulating valve, which can realize indoor ventilation through the power exhaust and delivery of the main engine. 3. Total heat exchange fresh air system total heat exchange fresh air system is an improved air supply and exhaust system with heat acceptance effect based on bidirectional fresh air system. Its working principle is the same as that of two-way flow, but the difference is that the air supply and exhaust are completed by a main engine, and a heat exchange mole is added inside the main engine, which can absorb and release heat quickly, ensuring full heat exchange with the atmosphere. The outdoor atmosphere and the fresh air sent into the room are heat exchanged in this total heat exchange device, so as to achieve the goal of accepting the cold and heat, and save the energy of air conditioning. On the basis of improving the quality of the indoor atmosphere, the influence on the indoor temperature is eliminated. 4. Because carbon dioxide is heavier than atmosphere, the oxygen content of the ground air supply system is lower as it is closer to the ground. Considering from energy saving, the fresh air system will get better ventilation results when it is placed on the ground. The cool air from the air supply outlet at the bottom of the floor or wall or from the upper air supply outlet diffuses on the surface of the floor to form a structured air flow structure; A buoyant wake is formed around the heat source to carry away the heat. Because the wind speed is low, the turbulence of the air structure is smooth, and there is no large eddy current, the air temperature in the indoor working area has the same specific force in the degree of deviation, while in the vertical deviation, it is stratified, and the higher the layer height is, the more obvious this sign is. The upward wake generated by the heat source can not only take away the heat load, but also bring the turbid atmosphere from the event area to the upper part of the room, which is squeezed by the exhaust outlet at the top. The fresh air from the bottom air outlet, waste heat and pollutants move upward under the driving force of buoyancy and airflow structure, so the ground air supply system can provide excellent atmosphere in the indoor area. Of course, local air supply has certain advantages, but it also has certain practical conditions. When the height of the layer is not less than 2.5m, the turbid atmosphere is easy to be carried away by buoyancy wake; There is also an upper limit for the planned cooling load of the room. According to the current research, if there is enough space for large-scale air supply and dispersion devices, the room cooling load can reach 120W / m2. If the room cooling load is too large, the power consumption of replacement ventilation will be significantly increased, and the economy will drop; In other places, the contradiction between the land and space occupied by the air supply device is more prominent. It can be seen that according to the differences in the placement environment of the fresh air system, there will be some differences in the selection of the fresh air system. Only by choosing the right fresh air system can we achieve the best exchange atmosphere. 5、 According to the ventilation power, the fresh air system is classified into natural ventilation and machine ventilation; According to the category of ventilation: full ventilation, partial ventilation; According to the air flow deviation classification: send (enter), exhaust (smoke); According to ventilation target classification: common ventilation, hot air heating, detoxification and st removal, disordered ventilation, protective ventilation, construction of smoke control, etc; According to the position of power, it can be divided into two types: power convergence type and power diffusion type. 6、 Important application of fresh air system application scope of fresh air system: it is necessary to use the fresh air system when people are always in this room and the room is not ventilated well. To sum up, the household fresh air system (adopting negative pressure ventilation method) is suitable for small space occasions such as apartments, villas and baby rooms with less ventilation; To deal with KTV, Internet bar and other entertainment places where people have more activities and more ventilation times, as well as computer rooms, hotels, markets, workshops, office buildings, restaurants, banks, classrooms, kindergartens, hospital wards and other places, it is best to use fresh air units. Because of more ventilation times and more energy loss, it is necessary to use heat to accept fresh air system. How much is the household fresh air system? Now, there are three kinds of household fresh air systems in the market, one is the fresh air in the middle of the pipeline, one is the fresh air purification of the floor model, and the other is the fresh air hanging on the wall. The middle fresh air can only be placed before decoration, and it needs to go through pipelines. The cost of placement is about 8000-30000 yuan, and the fresh air system of collier is the first, so the placement is convenient and not limited by decoration. It doesn't need to be firm. The cost of each set is between 2500-7000. It depends on the environmental space and efficiency. 99% of the air volume is from 120-400m3. It is also the most purification and energy-saving silent proct in the market. The installation of single wall mounted fresh air system is not limited, but it is necessary to install expansion screws on the wall, and the brands are numerous and the quality is uneven. The highest air volume is not more than 120m3 / h, the filtering results are not good, some even less than 50%, and the cost ranges from hundreds to thousands. The detailed environment can be chosen by everyone according to the need. The above is what the fresh air system is collected and sorted out by Zhang Gong, senior environmental manager of Shijiazhuang bihao better environmental protection engineering Co., Ltd., a designated formaldehyde removal enterprise in Shijiazhuang. I hope you will have a clearer understanding of the fresh air system after reading it, and choose the proper fresh air system. Central fresh air system the transmission method of central fresh air system adopts displacement type instead of the internal circulation principle of air conditioning gas and the unhealthy practice of mixing old and new gas. The strange outdoor atmosphere will be actively inhaled into the room through negative pressure method. When entering the room through the fresh air outlet installed in the bedroom, living room or window door of living room, it will actively remove st and filter. At the same time, the corresponding indoor pipeline is connected with the exhaust outlets in several efficiency rooms, and the formed circulation system will take away the indoor waste gas and "exhale" at the exhaust outlet, while the exhaust gas will no longer be recycled, and the new and old air will be well recycled. Moreover, considering the energy saving and reuse, the exhausted atmosphere city is accepted as a new energy, and the acceptance rate reaches more than 80%. In addition to the group building situation (plate, tower), the location of the building should also have a scientific basis. Just as the air pollution in the downwind area of the metropolis is not easy to dissipate, there are also ventilation corners in the community. The residents living in this area, even if the windows are opened, can not form a useful and fluent atmosphere, probably can not add high-quality fresh air. In the future, the location and shape of the building can be calculated scientifically by computer to relieve the pressure of cold wind in winter and avoid the formation of community ventilation angle, so that the outdoor pollutants can dissipate as soon as possible and form high-quality outdoor "fresh air". Accepting the intermediate fresh air system can not only ensure the fresh air, but also prevent the energy waste caused by the excessive fresh air ring the heating period. At the same time, it can prevent the owners from saving too much. For example, if the air conditioner is turned on at night, all the windows are closed, resulting in the harm of insufficient fresh air. At the present stage, the new trend in China is following the growth path of Europe in 1970s and 1980s, which belongs to the non forced project of comfortable housing. The new trend instry in European countries is also moving from non forced to today's forced, which is also a certain trend of domestic new trend instry growth. In order to integrate with the international situation, the new trend will also become a forced instry in China. The fresh air system has become one of the top ten new skills of the "private house" of the 8th International Living Expo. The function of the healthy fresh air system is introced. The ventilation of the middle fresh air system is not only to remove the polluted atmosphere, but also has the functions of deodorization, st removal, moisture removal and room temperature regulation. 1. Middle fresh air system: the ventilation function provides the strange atmosphere necessary for people to breathe, expels the polluted atmosphere, and keeps the indoor circulation peaceful for 24 hours. 2. Middle fresh air system: deodorization effect. The ventilator can quickly expel the uncomfortable odor caused by various reasons and create a peaceful situation. 3. Middle fresh air system: st removal efficiency, drifting in the st in the atmosphere, with a lot of bacteria invisible to the naked eye, so it is to drive away the st in the room, things and occasions, to create a peaceful situation. 4. Middle fresh air system: the effect of moisture removal

3.

Although the current epidemic has achieved a phased victory, there will still be a local rebound in the epidemic, even overseas imports. Therefore, good protection is still the top priority, wearing masks and keeping social distance is still the standard. During the epidemic period, masks have become the daily necessities of the public. Nowadays, there are many brands of masks on the market, and the quality is also uneven. No matter what brand of mask, as long as it has practical performance to block the virus, it is very popular with the public{ RRRRR}

in the street, we often see some young people wearing very fashionable masks, some even cloth masks. Such masks do not have a protective effect, they are just fashionable ordinary masks. It is not safe to wear such masks ring the epidemic period. If you contact with positive new crown patients, the risk of infection will be very high. During the epidemic period, the most important thing is to protect your life. If you just play handsome or good-looking, once you encounter an accident, it is easy to put yourself in danger. At that time, isolation treatment will leave sequelae, which is obviously not worth the loss

4. The difference between h901v and N95

5.

is not disposable, it can be worn for 3-5 days

The

h950v foldable respirator with valve is kn95, which can reach 98%; The design is light, low respiratory resistance, 97% Chinese alt face coverage“ H "mask, anti-counterfeiting label, exhalation valve to discharge moisture

Kn95 is one of the levels specified in Chinese standard gb2626-2006, and N95 is one of the levels specified in American Standard 42 CFR 84. There is no clear conclusion about the best wearing time of N95 mask in foreign countries, including who, and there is no relevant regulation on the use time of N95 mask in China

The results showed that after wearing N95 mask for 2 days, the filtration efficiency remained above 95%, and the respiratory resistance changed little; The filtration efficiency decreased to 94.7% after wearing it for 3 days

in the following cases, consider changing the mask

1 and the respiratory impedance increases significantly

2

3

4. The mask was contaminated (such as blood stains or droplets)

5. Used in indivial ward or patient contact (because the mask has been contaminated)

extended data

classification of anti haze masks

1. According to the appearance classification, masks mainly include ear type, strap type and headwear type, among which ear type is more convenient and comfortable to use[ 2]

2. According to the structure classification, masks mainly include: disposable flat mask, disposable folding mask, disposable cup mask, three-dimensional PM2.5 comfortable mask

3. According to the wearing position, the main types of masks were nasal mask, mask and nasal obstruction

4. According to the classification, PM2.5 masks are generally divided into:

1) ordinary level: no disinfection, may contain pathogenic substances, only suitable for st and particle prevention

(2) disinfection level: it can only kill pathogenic microorganisms, but other microorganisms still breed, so it is only used in ordinary occasions

Sterilization level: kill all microorganisms to achieve aseptic state, suitable for medical and public places

The safety factors of general and disinfection level are far lower than that of sterilization level, so consumers should see the outer package clearly and distinguish the level when purchasing disposable masks

6. Hello, as far as I know, Honeywell air purifier is very good. Honeywell is one of the top 500 brands in the United States with excellent quality. The general function of electronic air purifier is to remove PM2.5, bacteria and viruses, etc. at present, Honeywell's electronic air purifier models include: pipe type, f90a / b three-dimensional circulation type electronic air purifier, f52g return air type electronic air purifier, f92c multi-purpose electronic air purifier, uv100 ultraviolet air treatment system and 18000-chn electronic air purifier 18250-chn electronic air purifier.

7. Is the sterilization effect better for Honeywell or Blueair? Now Honeywell has been included in the sanctions list by China. It is suspected of arms sales to Taiwan. The tanks and engines sold to Taiwan by the United States are made by Honeywell.