Central air-conditioning and fresh air system are two different concepts. They belong to two different comfortable home systems. Central air-conditioning is mainly used for cooling and heating. Central fresh air system is mainly used to ventilate indoors. Now many central air-conditioning systems have fresh air. System, but this is not strictly a "new wind", at best it can only be called "wind".

Why do central air conditioners need to install a fresh air system

With the continuous improvement of living standards and the rapid growth of new buildings, people’s requirements for indoor living experience and indoor comfort and air quality are getting higher and higher. Experts point out that the indoor environment must be conducive to health, which promotes With the prosperity of household central air conditioners and fresh air systems, household central air conditioners are also constantly meeting people's growing material needs in inverter innovation.

Household central air-conditioning is mainly divided into two parts. The beginning is the central air-conditioning host, and the end is the indoor unit. The indoor unit is equivalent to a fresh air system, but in fact it does not have the function of a fresh air system. It can only be said that it is an advanced fan. To achieve the effect of fresh air ventilation, a central fresh air system must be installed, which can improve the indoor air quality, keep the indoor fresh and comfortable, and is beneficial to health.

Central air-conditioning fresh air system design specification

Many people think that the larger the fresh air system, the more comfortable it is. In fact, this is not the case. It is understandable that fresh air can greatly improve indoor air quality, but it is not that the greater the fresh air volume, the better the air conditioning effect. Experts believe that good air quality requires not only clean air, but also pleasant temperature and humidity. Although the central air-conditioning fresh air system improves the freshness of the air, it also increases the cooling and heating load of the air-conditioning, which not only affects the air-conditioning effect, but also greatly increases power consumption. So how to design the fresh air system to be reasonable? Let's take a look at the design specifications of the central air-conditioning fresh air system.

my country has the following regulations for the value of large-scale central air-conditioning fresh air system: first calculate the fresh air volume per person at 30m3/h, and then calculate the air exchange volume according to the number of air changes specified for different construction purposes, and then the larger of the two is set as the final In developed countries, there have been special regulations on the amount of fresh air for household central air-conditioning.

Experts pointed out that the fresh air volume of the central air-conditioning fresh air system should be no less than 20m3/(hw). When designing the central air-conditioning fresh air system, the following three factors determine the size of the fresh air:

(1) The community environment and geographical conditions where the installation family is located. If the environment is comfortable, clean and well ventilated, the design can reduce the amount of fresh air;
(2) Floor height. Since reducing the concentration of pollutants is the main purpose of installing the fresh air system, if the floor where the home is installed is higher, especially above the 10th floor, the air is relatively clean, which can reduce the design of the fresh air volume;
(3) Special requirements of customers. Some customers have their own unique lifestyle habits, such as smoking and so on.

Most of the central air-conditioning installations now have a fresh air system. The fresh air system itself is not very expensive. Coupled with the magical function of the fresh air system to breathe the old into the new and turn waste into treasure, many home users will choose to install the central air-conditioning fresh air system. The current popular fresh air system The brands are Panasonic and Honeywell fresh air systems. Among them, Panasonic's silent fresh air is worth recommending, which saves energy and electricity, and adds a sense of comfort and tranquility to life.