1) Add fresh oxygen.
Before the appearance of fresh air system, people used air purifiers to control air pollution. As we all know, air purifiers have huge defects. It uses internal circulation, so that indoor oxygen can not be effectively supplemented after being consumed by human body, and the concentration of carbon dioxide becomes high, and the anoxic environment will make people feel sick such as vomiting and dizziness.
The fresh air system introduces outdoor fresh air through punching holes and enters the room after filtering. The air has high oxygen content, which solves the problem of hypoxia. You can enjoy the fresh indoor air without opening the window, just like a natural oxygen bar.
2) Filter smog PM2.5
Smog is frequent, and PM2.5 infringes on the body. The fresh air system has a built-in high-efficiency filter, which has a strong filtering effect on fine particles such as PM2.5.
3) in addition to formaldehyde, benzene and other harmful gases.
At present, the most effective method in in addition to formaldehyde is ventilation, and other methods of chemical in addition to formaldehyde can only play a temporary role. Once the time is long, formaldehyde will continue to evaporate. However, it is obviously not advisable to open the window for ventilation in foggy days. The fresh air system uses the characteristics of strong ventilation to solve the entanglement and contradiction of whether to open the window or not. Indoor air is constantly convective, pushing out harmful gases such as formaldehyde and benzene to avoid the harm of decoration gas to the body.
4) disinfection
Bacterial viruses can easily reproduce indoors. The fresh air system effectively kills viruses with reasonable air circulation power, and at the same time, with special sterilization function, it kills bacteria and viruses in many ways, keeping bacteria away from vulnerable groups such as children and the elderly.
5) flue gas purification and dust removal
Secondhand smoke is very harmful to pregnant women and children, and fresh air system can quickly remove smoke through forced ventilation. DeLay fresh air system also has a specific smoke cleaning function. As long as it is turned on, it will start the smoke cleaning mode and drive away all the smoke with the fastest air circulation.
6) mildew and deodorization
Some sealed spaces are often cold and humid indoors, so outdoor air can't get in and polluted air can't get out, so it is often easy to get moldy and produce peculiar smell. The fresh air system allows the indoor and outdoor air to be replaced in real time, and the odor and moisture are discharged to the outside, so that the room can be kept clean and fresh at all times.
shortcomings
1) At present, the best and most comfortable fresh air system on the market is duct air supply, which needs to be arranged before renovation, and the renovated house needs to be demolished and renovated before it can be arranged.
2) The effect of fresh air without air duct is worse than that with air duct, but some investment is needed in the early stage of fresh air with air duct.
3) In the later maintenance, the fresh air system should replace the HEPA filter regularly, and it will lose its function if it is not replaced in time. Generally, the filter can be replaced once every three months. If it is autumn and winter, the haze weather is more serious, so it should be replaced more frequently.
4, indoor cold (heat) loss. The fresh air system cleans the indoor air conditioner through continuous exhaust and air supply. Using air conditioning at the same time in summer will cause a certain loss of indoor air conditioning, as well as in winter. The total heat exchanger (a fresh air system) can reduce the indoor energy loss and save energy.
5. There is a certain amount of investment in the early stage. The price of purchasing fresh air system is related to many factors. Low price, poor performance, high energy consumption and insufficient comfort. A better intelligent fresh air system has a large initial investment, and of course, the cost recovery of this fresh air system is also fast in the later stage.
6. The filter element needs to be replaced regularly. If the fresh air system does not clean the filter in time, it is likely to become an indoor pollution source, so it is necessary to replace the filter and movement of the fresh air system or fresh air device frequently. It can be replaced every 2-3 months. When the air quality is bad, it is recommended to change it once a month.