What are the requirements for good indoor air? No dust? No PM2.5? Most people actually ignore another important factor, that is, the air must be "fresh". According to the "China Building Air Conditioning Fresh Air Ventilation Frequency Standards", general apartments require 0.4-0.7 air changes per hour when no one is smoking, while offices with a small number of people need 1.1-2.7 air changes per hour. Otherwise, large amounts of carbon dioxide and other exhaust gas will be deposited indoors. In addition to causing irritability and reduced work efficiency, extreme conditions will also cause death. In addition, the indoor air is not circulated, it is also easy to humidify and breed bacteria, bringing new health risks.
Therefore, new office buildings or shopping malls usually bother to design a fresh air system to ensure that indoor air circulates at a certain rate. Advanced fresh air systems also often become the capital that real estate developers show off to their peers. For example, Pan Shiyi pointed out when promoting his Galaxy SOHO on Weibo: "The Galaxy SOHO's fresh air system allows people working here to breathe fresh and clean air without opening windows ... The fresh air system continuously feeds outdoor air Indoors, it makes everyone working and living here feel fresh and happy. "
Real estate developers have long considered the indoor fresh air problem; but the general public has not considered it enough. In winter and summer, in order to stabilize the indoor temperature, many families would rather close the windows and turn on the electric heater or air conditioner to spend the day. PM2.5 often bursts in big cities such as Beijing. In order to prevent outside air from entering, many people also choose to close doors and windows tightly.
Some families do consider the "freshness" of indoor air and purchase air purifiers. However, the current quality standards for air purifiers in China do not consider the impact of personnel activities on air quality. The test environment is only a 30 cubic meter confined space. Correspondingly, most air purifiers on the market do not take this demand into consideration, just circulate the "dead" air indoors. Some people ridicule the air purifier, the dirtier it gets, the more unreasonable it is. The lack of ventilation function is indeed the dereliction of current air purifiers.
As we all know, ventilation should be best outside the peak hours of congestion such as commuting time, otherwise the pollutants in the outside road air will re-enter the room. It is a pity that property owners generally go to work during this time and cannot operate indoor air purification facilities. How to allow users to operate remotely to complete the ventilation operation should also be a problem that developers of next-generation air purifiers should solve.
If an air purification device can do both, it may have a revolutionary impact on the entire industry, creating a 2.0 era of air purifiers. But it is not easy to design such a device that can not only ventilate, but also ventilate regularly. Such a purifier first needs to double purify the room and the air that is about to enter the room. Therefore, in addition to indoor circulation, developers also need to design a system to communicate with outdoor air, which increases the workload of the original product and the number of equipment. In addition, because the quality of outdoor air is generally lower than that of indoor air, the purification of outdoor air is completed. From a pure purification technical level, the requirements for manufacturers are also higher.
To allow users to ventilate indoors at an appropriate time, it is necessary to design a networked system with a good user experience. The air purifier needs to be connected to one of the user's portable devices (such as a mobile phone) through WIFI or data network, and then the user can remote control the home appliance through the client. This also involves Internet propositions such as smart homes, which require a higher level of requirements for manufacturers, but there are not many home appliance companies that can do this.
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