Update: 2019-12-20 17:29 Source: LUFTMY
Into the winter, the haze began to return. How to protect effectively in haze days? The general office of the national health commission has recently released the guidelines on the health protection of people suffering from air pollution (haze), which puts forward that sensitive groups such as the old, the young and pregnant, patients with chronic diseases and long-term outdoor workers are three key groups for the protection of haze pollution, and suggests that primary and secondary schools and kindergartens should be equipped with air purifiers.
The main function of air purifier
Haze is a weather phenomenon in which a large number of aerosol particles with particle size less than several microns make the horizontal visibility less than 10.0km and the air is generally turbid. The direct effects of haze pollution on health are mainly irritation symptoms and acute effects, which are mainly manifested as eye and throat irritation, cough, dyspnea, nasal obstruction, runny nose, skin rash, etc., and the symptoms of upper respiratory tract infection, asthma, conjunctivitis, bronchitis and other diseases are enhanced. At the same time, the appearance of haze will weaken the ultraviolet radiation, affect the synthesis of vitamin D in human body, lead to the high incidence of rickets in children, and enhance the activity of infectious bacteria in the air.
As the first person responsible for their own health, public individuals need to strengthen self-health protection, learn anti haze knowledge, master anti haze skills, correctly use anti haze tools, reduce their own exposure, and maintain their own health.For example, in light haze weather, children, the elderly, pregnant women and patients with cardiopulmonary disease should reduce going out and outdoor exercise, and more indoor exercise or exercise time should be adjusted to avoid going out for exercise in the peak period of haze pollution; in moderate haze weather, children, the elderly, pregnant women and patients with cardiopulmonary disease should avoid going out and outdoor exercise; in severe haze weather, children, the elderly Pregnant women and patients with cardiopulmonary disease should stay indoors; when key groups have to go out, they should wear protective masks equipped with breathing valves.
Haze forecast level
In public places with a large number of indoor personnel, ventilation and air exchange shall be timely conducted according to the degree of air pollution, and the fresh air system for filtering and removing fine particles shall be supplemented. Indoor places such as kindergartens, primary and secondary schools and offices are recommended to be equipped with air purifiers to reduce PM2.5 concentration as much as possible; when conditions permit, fresh air can be introduced by fresh air devices to prevent excessive carbon dioxide concentration. In case of severe haze, kindergartens and schools shall suspend outdoor collective activities and try to avoid indoor sports.
In haze weather, after closing doors and windows and opening the air purifier indoors for a period of time, the air PM2.5 concentration in the indoor confined space will be significantly reduced.Consumers should make clear the purpose of purification and choose air purifier with fine particle purification function. To choose a standard air purifier. It is recommended to purchase air purifier with high clean air volume, high cumulative purification volume, high energy efficiency level and low noise volume.
Only when the air purifier is opened for a certain period of time can the pollution degree of indoor particles be reduced. The purification effect is related to the room area and the purification efficiency of the purifier. It should be noted that the air purifier should not be placed close to the wall or furniture, and there should be a certain distance between the air purifier and the wall to ensure the smooth air flow in and out of the machine and the purification effect.According to the air purification effect, change the filter material or clean the electrostatic adsorption electrode. The purification effect of air purifier can be observed from time to time.
In the current field of air purification, PM2.5 sensor has almost become the standard hardware of purification equipment. Its effect is to monitor the concentration of PM2.5 and other particles in the air. Its working principle is as follows: a constant light source (such as infrared light-emitting diode) is set inside the PM2.5 sensor. When the air passes through the light, the particles in it will scatter, leading to the attenuation of light intensity. The relative attenuation rate is proportional to the concentration of particles.
LUFTMY high precision infrared PM2.5 sensor HPD05 sensor has a built-in infrared light-emitting diode and a highly sensitive photoelectric receiving sensor. When the infrared light-emitting diode emits light, it will produce reflected light when encountering dust. The photoelectric sensor reflects the concentration of dust in the air by detecting the intensity of the reflected light. The sensor directly outputs PWM signal, and the PWM width is the current concentration Degree value. High precision infrared PM2.5 sensor HPD05 has stable detection ability, high production efficiency and double advantages.High precision infrared dust sensor hpd05 has the characteristics of small volume, high precision, low power consumption, short response time and stable operation under high dust concentration. This high precision PM2.5 sensor can be applied to air purifier and fresh air system.