Classification by means of air supply
1, one-way flow of fresh air system
Unidirectional flow system is based on three principles of mechanical ventilation system of Central mechanical exhaust the natural wind and into the wind with the diversification of ventilation system is composed of fan, air inlet, outlet and various pipes and joints. Installed in the ceiling fan through the pipeline and a series of exhaust outlet connected, start fan, indoor turbid air after installation in indoor ceiling air exhausted to the outside through the fan, in the indoor form several effective pressure zone, indoor air continued to flow in the zone of negative pressure and is discharged to outdoor, outdoor fresh air by installed between the window frame above the window frame and the wall) air inlet will continue to complement the indoor, so that you always breathe the high-quality fresh air. The air supply system of the fresh air system, but no need to send the connection of the wind pipe, and the exhaust pipe is generally installed in the aisle, bathrooms and other places usually have a ceiling, basically no extra space.
2, two-way flow of fresh air system
The two-way flow fresh air system is the Central mechanical transmission and exhaust system based on the three principles of mechanical ventilation system, and it is an effective complement to the one-way flow of fresh air system. The bidirectional flow system design ranked wind host and indoor row tuyere location and unidirectional flow distribution is basically the same, different is the two-way flow system in the fresh air is fed by the host of fresh air. Fresh air host is connected through pipeline and the indoor air distributor, fresh air host continue the outdoor fresh air through the pipeline into the interior, to meet the people's daily life for fresh, quality of the air. The air outlet and the air outlet are provided with an air volume control valve, and the power exhaust and the air flow of the main engine are realized through the main engine.
3, air supply system
As carbon dioxide is heavier than air, the closer to the ground, the lower the oxygen content, from the aspect of energy saving, the fresh air system will be installed on the ground will be better ventilation effect. The cold air from the bottom of the floor or the wall of the air inlet or the air outlet is diffused on the floor surface to form an organized air flow organization, and the heat source is formed around the heat source. Due to the low wind speed, turbulent airflow moving gently, no large eddy current and indoor air temperature in the horizontal direction is consistent, and stratified in the vertical direction, layer height, this phenomenon more obvious. By the heat source generated to wake can not only take away the heat load, will also be polluted air from the work area to indoor above, located at the top of the exhaust outlet. At the bottom of the air outlet, the waste heat and air pollution in the air and the driving force of the driving force, so the air supply system can provide good air quality in the indoor work area.
Although ground supply air has certain advantages, but it also has certain applicable conditions. Generally applicable to pollution source and heat source related to the place, and the story of not less than 2.5m, when air pollution is easy to be buoyant plume away; of room design cooling load is also an upper limit, the present study shows that if there is enough space to large air supply diffuser device of words, the room cold load up to 120w/ square meters, room cooling load is too large, displacement ventilation energy consumption will significantly increase, the economic decline; additionally air supply device area, accounting for the contradiction of space is more and more outstanding.
Thus, according to the different installation environment of fresh air system, the selection of fresh air system will be some differences, only choose suitable for their own fresh air system, in order to achieve the best exchange of air effect.
Classification by means of installation:
1, central fresh air pipeline system: central fresh air pipeline system is connected through a pipeline and the fresh air host, system principle, in the kitchen, bathrooms installed exhaust fan and platoon wind pipelines and other supporting facilities, in the bedroom, the living room installed design air inlet. Exhaust fan operation, discharge original indoor air and indoor air to produce negative pressure, the outdoor fresh air under the role of pressure difference space, through the inlet into the room, in order to achieve the purpose of indoor ventilation.
2, monomer fresh air system: monomer fresh air system is in recent years the new listing of new air system products and includes a wall hanging type air system, floor ventilation system 2 product. The main structure and central fresh air system and do not have too big difference, the different point is that monomer fresh air system does not require complex pipeline engineering, installation is very simple, both before and after the decoration can be installed, the late maintenance cost is very low.