Some users say that the fresh air system is not very useful when installed, and occasionally it doesn’t work. Or it’s okay at the beginning, but after using it for a few years, it’s no effect, and it’s basically a decoration. Is this really the case?
Fresh air system is a professional indoor air treatment system, and the selection and installation of the machine need certain considerations. Today, Xiaotuo will briefly analyze the difference between one-way flow and two-way flow in the fresh air system model to help you choose the right fresh air system.
The so-called one-way and two-way are actually named according to the wind direction of the machine. One-way flow means that there is only one wind direction, with positive pressure type (forced air supply, natural exhaust) and negative pressure type (forced air supply, natural ventilation); two-way flow means both air supply and exhaust functions, fresh air is sent through the inlet duct, and the original air in the room is discharged through the exhaust duct.
First talk about unidirectional flow, which is divided into positive pressure unidirectional flow and negative pressure unidirectional flow. Positive pressure unidirectional flow belongs to "forced air supply + natural exhaust air", that is, under the action of mechanically, the purified fresh air outside is forced into the room. As the fresh air enters the room, a positive pressure will form in the room. Under the action of positive pressure , the indoor dirty air is discharged through the gaps of doors and windows, forming air replacement.
The second type is negative pressure unidirectional flow, which is "forced exhaust + natural air supply", which refers to forcibly sending indoor dirty air out of the outdoor under mechanical action, forming a negative pressure inside. Under the action of negative pressure, fresh outdoor air enters the indoor from the living room, bedroom, study, etc., and the principle is similar to an exhaust fan.
At present, the most commonly used household unidirectional flow fresh air system is positive pressure unidirectional flow, with relatively good purification effect and sufficient fresh air introduced, which can basically meet certain space needs. The one-way flow fresh air system is the basic model and can meet the ventilation rate and cleanliness required by people.
Because the machine structure is relatively simple, the price is relatively cheap, the operation is also simple, and the space occupies a small area. However, the airflow structure is single, and the air pressure difference naturally generated indoors and outdoors is only used for ventilation. The effect sometimes does not meet expectations. Moreover, without the full heat exchanger , there will be certain energy consumption loss.
The bidirectional flow fresh air system can be said to be an advanced model of unidirectional flow. It can transport filtered outdoor fresh air into the room and actively discharge the dirty gas in the room. One pass and one row to achieve the replacement and convection of indoor and outdoor air, high ventilation efficiency and more obvious purification effect. It has a full heat exchanger, which can effectively balance the temperature and humidity of indoor air and avoid the discomfort caused by temperature differences.
In addition, the two-way flow fresh air system generally has a heat recovery core built-in. The fresh air sent and the exhausted air will pass through the heat exchanger at the same time to exchange energy to make up for some temperature differences. Whether it is the cold north or the humid south, it always performs well, ensuring the normal and efficient operation of the machine, and always providing you with fresh, clean, healthy and comfortable indoor air.
In short, household fresh air system can achieve ventilation, blocking outdoor dust, pollen, PM2.5 and other effects, whether it is one-way flow or two-way flow. Of course, the two-way flow fresh air system has a better ventilation effect, and the two-way flow fresh air system with full heat exchange can also bring a more comfortable and energy-saving fresh air experience.
As for how to choose, you still need to consider your personal needs and housing conditions in a comprehensive way. You can also hand it over to us to provide you with professional advice and services. The above is what we share today. If you want to know more about fresh products, please don’t even know! Don't forget! Give me a thumbs up to Xiaotuo! collect! Add to follow duck ~
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