At present, most supermarkets, shopping malls and other public environments mainly rely on mechanical ventilation devices such as central air conditioning system to adjust indoor air quality. Once the air supply is insufficient, the oxygen is scarce, and the indoor air is dirty, it will become a place where some respiratory infectious diseases spread and spread, which will have an impact on the health of shoppers. In some large shopping malls with large traffic, the number of people can reach tens of thousands at the peak, and the exhaled carbon dioxide and the carbon dioxide caused by it will exceed the standard. The indoor environmental monitoring results show that the carbon dioxide concentration in some monitoring points is 5-6 times higher than that in outdoor during the shopping peak period.
At present, the main pollutants in the indoor public environment such as shopping malls are formaldehyde, carbon dioxide, carbon monoxide, stupid, inhalable particles and noise. Shopping malls, etc. Will use more decoration materials because of their large public space. It takes a long time for harmful substances such as formaldehyde and benzene in decoration materials to volatilize. In the case of poor ventilation system, public places such as shopping malls will become places where some respiratory infectious diseases spread and spread, which will have an impact on the health of shoppers. Therefore, Lan Ju Intelligent Technology would like to remind you that it is not advisable to spend too long in shopping malls and supermarkets. Old people, children, heart patients and cerebrovascular patients should try to avoid going to crowded places.
At present, the main pollution sources of shopping malls and supermarkets can be divided into four types:
One is the pollution of decoration materials from supermarkets. Some large shopping malls are in a hurry to open, working overtime all night to decorate, and opening immediately after the decoration. Without ventilation for a period of time, even if the fresh air system is turned on, formaldehyde in some plates and paints can't be completely volatilized, and such an environment will definitely pose a threat to the health of shoppers.
The second is the fresh air system from the supermarket. In order to save electricity, some businesses do not open or fully open the fresh air system, and there is no outdoor fresh air to enter, resulting in a sharp increase in the number of people, resulting in indoor carbon dioxide exceeding the standard. China's Indoor Air Quality Standard and Code for Indoor Environmental Pollution Control of Civil Buildings stipulate indoor air quality control standards for second-class construction projects such as shopping malls, libraries and restaurants, but because these standards are not mandatory, businesses will inevitably turn a blind eye when implementing them.
The third is noise pollution. Shoppers, loudspeakers, voices and noisy background music in shopping centers can be annoying.
The fourth is the smell of fresh food. The strongest smell in the supermarket should be the fresh food department. Fish and shrimp smell of fish. In case of corruption, the smell emitted by bacteria pollution will be stronger and the air pollution will be more serious.
For the indoor environmental pollution of shopping malls, Lan Ju Intelligent Technology thinks that the most important thing is "monitoring first, then treating". Through the deployment of indoor air environment detection system for shopping malls and other environments, unified layout, setting monitoring points, real-time monitoring of indoor air environment indicators in shopping malls. Common indoor pollutants, such as PM2.5, PM 10, formaldehyde, temperature and humidity, stupidity, noise, carbon dioxide, carbon monoxide, etc., are monitored, and the monitoring data are displayed on the big screen in real time, so that customers can intuitively see the indoor environmental pollution data and know what kind of environment they are in. At the same time, it can remind according to the change of indoor pollutants, provide humanized service, and can be linked with fresh air ventilation system. When the pollutant index reaches the set threshold, the ventilation system is automatically started in the background to expand the fresh air input. Through effective monitoring and data management, users can find indoor environmental problems in shopping malls in time and make adjustments and improvements.
It is of great social significance and practical application value to accurately monitor and analyze the overall air hygiene quality in public places such as shopping malls, especially indoor places with dense population or large flow of people, and to establish an efficient and reliable indoor air environment detection system to provide decision support for taking necessary emergency measures in time.