The difference between fresh air system and air conditioning. Do you still need air conditioning when installing fresh air system?

With the improvement of living standards, many people are more and more concerned about air quality. For example, products such as air fresheners are particularly concerned by consumers. In line with this trend, fresh air system appears in front of people. Perhaps the fresh air system is visually similar to air conditioning, but they are not the same product. Let's introduce the difference between fresh air system and air conditioning. If a fresh air system is installed, do you still use air conditioning?

First, the difference between fresh air system and air conditioning

Air conditioning regulates indoor temperature by cooling and heating, and fresh air system uses the circulation of indoor and outdoor air to ensure indoor air quality. Generally speaking, air conditioning uses the function of cooling and heating to keep the human body at a relatively comfortable temperature, while fresh air system can ensure the freshness of indoor air. Because in summer, if the doors and windows are closed for a long time and the air conditioner is turned on, the indoor air will be very dry. If the fresh air system and air conditioner are turned on at the same time, the air will be clean and refreshing.

2. Does the fresh air system still use air conditioning?

When many merchants publicize the fresh air system, they say that it has achieved the effect of cooling and heating. Actually, this is a wrong concept. Because the "total heat exchanger" of fresh air system is used to balance the indoor and outdoor temperature difference, indoor dirty air and outdoor fresh air are crossing the heat exchanger core during operation. Due to the temperature difference and steam partial pressure difference on both sides of the air separator, the two air streams show heat and mass transfer phenomenon when passing through the separator, thus causing the total heat exchange process. However, without the assistance of air conditioning, the indoor temperature is the same as the outdoor temperature, and the fresh air system can not effectively change the indoor temperature, so air conditioning is still needed to cool down.

Third, can air conditioners with fresh air function replace fresh air systems?

The fresh air function of the air conditioner is to circulate indoor and outdoor air, because this is the process of pressurizing the room when the air conditioner inhales outdoor air. When the indoor pressure is equal to or higher than the outdoor pressure, a closed circulation system is formed between the room and the air conditioner, which cannot achieve the purpose of indoor and outdoor air exchange, that is, the indoor temperature can be guaranteed to reach a set fixed value without changing fresh air; The fresh air system discharges turbid indoor air and introduces outdoor fresh air through ventilation to realize the circulation of indoor and outdoor air. The fresh air system can effectively change the indoor air quality. To put it simply, compared with the "fresh air function" of central air conditioning, the fresh air system has the advantage that it will discharge dirty air outdoors and filter the inhaled air more carefully and reliably.

Four. suggestion

You need to consider the local air conditions when choosing. Generally speaking, the "home fresh air system" can work in coordination with the central air conditioner, which can not only ensure that the indoor temperature reaches the set expected value, but also effectively obtain fresh and clean air. In addition, the outdoor temperature is high in summer. If you enter the room through the "total heat exchanger" of the fresh air system, the total heat exchange rate will be close to 80%, which will greatly reduce the fresh air temperature, so that the indoor central air conditioner does not need to consume more energy to cool down.

The above is about the difference between fresh air system and air conditioning, and whether the fresh air system still uses air conditioning.