The difference between central air conditioning and fresh air system
1. Concept difference
It is composed of air outlet, air outlet, filter box and various pipes and joints. Installed in the ceiling of the kitchen or toilet, when the machine starts, the indoor polluted air is discharged to the outdoors through the exhaust port, and the outdoor fresh air enters the room through the filter box and the air inlet, so that the indoor personnel can breathe high-quality fresh air. Moreover, taking into account the energy saving and reuse, the exhausted air will be used for heat recovery, and the recovery rate reaches more than 80% as new energy.
Central air conditioning: It is a cold and heat source system. The refrigeration system provides the required cooling capacity for the air conditioning system to offset the cooling load of the indoor environment; the heating system provides the air conditioning system to offset the indoor environment. Ambient heat load heat.
2. Differences in function
The function of the fresh air system: to ventilate the room, introduce fresh air from the outside, discharge the polluted air, and let the indoor 24 Breathe fresh air every hour.
Central air-conditioning function: cooling or heating, adjusting and controlling the indoor air temperature, in summer, the room temperature can be lowered to 24-28 ℃, and in winter, the room temperature can be raised to 18-22 ℃, to achieve suitable and comfortable.
3. Principle difference
Principle of fresh air system: use the power of the fan, and the technology of ducting and exhausting to connect the outdoor air, form a circulation, and organize Movement of indoor airflow, thereby improving indoor air quality.
The working principle of central air conditioning: using the power of the fan to form indoor air circulation, the air passes through the cold source in the air conditioner, or the heat source absorbs or dissipates heat, changes the temperature, and sends it into the room to get what people want. suitable temperature.
4. Differences in use
The fresh air system is generally used in a sealed and poorly ventilated indoor environment, and is used in places with poor air quality. The central air conditioner is generally used in the two seasons of summer and winter to prevent severe cold or heat.
The connection between the fresh air system and the central air conditioner
The fresh air system and the central air conditioner are both systems that change the indoor air, and the two are closely related. , shopping malls, hotels, hotels, office buildings and other places have a wide range of applications. The fresh air system can make up for the problem that the central air conditioner can only adjust the indoor temperature, but cannot eliminate the indoor turbid air and improve the indoor air quality; the central air conditioner can realize the problem that the fresh air system cannot cool and heat and adjust the indoor temperature. The two complement each other and complement each other. When used together, they can not only maintain a moderate temperature in the room, but also enjoy fresh air.
The focus of fresh air systems and central air conditioning installation applications is different, one for improving indoor air quality and one for improving air temperature. The fresh air system can not only make up for the lack of fresh air being introduced by the central air conditioner, but also perform heat recovery before the indoor air is discharged outdoors, retaining 70% of the energy in the indoor air, avoiding the loss of air conditioning heat or cooling, and reducing the energy of the central air conditioner. consumption. With the further understanding of the function of the central air-conditioning fresh air system, more and more users will install the central air-conditioning fresh air system at the same time.
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