What is the simplest indoor exhaust system?
The simplest indoor exhaust system is the exhaust fan, which generally makes indoor air circulate, so that the indoor organic solvent can be quickly removed after evaporation to prevent the organic solvent in the indoor air from being too high, which will lead to explosion or poisoning.
Exhaust fan is a kind of air-conditioned household appliance which is driven by motor to rotate the fan blades and push the cyclone to exchange indoor and outdoor air. Also known as exhaust fan. The goal of the exhaust pipe is to remove the dirty air in the house, adjust the ambient temperature and humidity, and feel the actual effect. Exhaust fans are widely used in homes and public places.
What are the effective indoor ventilation methods?
1, indoor ventilation is easy to understand, advantages: the most cost-effective, economically developed, easy-to-understand exhaust method. However, the defects are also obvious: the airflow organization is chaotic, which is very likely to send the smell of bathroom and restaurant kitchen to the living room and bedroom; Mixed with outdoor particulate matter and floating dust pollutants, endangering indoor air hygiene; Inevitable noise pollution; The environmental temperature of indoor heating or cooling flows out, which leads to resource consumption to some extent.
2. The natural ventilation of the exhaust fan can have a good actual exhaust effect in the windless process, but the defects are still obvious: the efficacy range is too small, the continuous ventilation ability is weak, it is very easy to produce noise and be easily destroyed, and the maintenance in the middle and late stages is gradually increasing. Let's briefly talk about central air conditioning. The indoor and outdoor ventilation capacity of traditional central air conditioning is weak. In recent years, the central air conditioner of domestic fresh air system has a certain ventilation and exhaust air volume, but under the condition of positive indoor pressure, the exhaust air volume will be further reduced. And the price will exceed the general central air conditioning.
3, air purification treatment air fume purifier: only by absorbing fine particles such as dust in the air, harmful molecular structure can not be removed, even if it is continuously solved, the actual effect is still very poor. Air disinfectants and air fresheners: After being sprayed in the house, they are mixed with the original dirty air, which is equivalent to coating the room with "hidden" paint, which makes people's noses numb and smells like "self-deception". Not only can it not cure environmental pollution, but it will also continue to pollute the room twice, making the air in the room worse. Inside, air conditioning freon or air ozone layer destroyer will be destroyed. Air analysis: The air dialysis system software has low noise when running. The dirty air in the room is exhausted by the exhaust fan, and then the outdoor air is introduced into the room by the fan according to the exhaust pipe. Purify the air through high-temperature sterilization, filter screen filtration and other technologies, and deliver the purified air to every room.
4. Domestic fresh air system In a closed room, mechanical equipment is used to send the fresh air system indoors, and then professional equipment is used to discharge it outdoors, which will produce the basic principle of "fresh air system flow field" indoors, thus achieving the necessity of indoor fresh air system ventilation. Many advantages, quiet, ventilated, beautiful and generous, strong privacy; But the investment is relatively large.
Ventilation duct installation requirements
1. General requirements for the manufacture of air ducts: Before the manufacture of air ducts, first check whether the raw materials used meet the product quality requirements and whether there is a product certificate or quality evaluation document. If there is no such certificate, the appearance inspection shall be carried out, and the following requirements shall be met: the surface of the furniture plate shall be smooth, uniform in thickness, free from bumping and obvious crushing, and free from cracks, Chacon, scars, burrs and rust. Steel should be uniform and symmetrical, and there should be no cracks, bubbles, holes and other defects that endanger product quality. Other raw materials cannot reduce the compressive strength of finished products or endanger their application efficiency because of their shortcomings.
2, duct and parts surface leveling, arc symmetry, vertical seam should be separated; Bite seam should be tight and the total width should be symmetrical. The welding shall be visually inspected, and there shall be no defects such as exhaust port, Chacon, flash, gap, etc. The deformation of thick steel plate after electric welding should be corrected.
3. When making metal air ducts and pipes, the allowable error when the diameter or foreign minister is less than or equal to 300mm:-1mm; 300-2mm or more is -2mm. When making flanges, the allowable error of the nominal diameter of annular flange or the specification of the inner edge of rectangular flange is +2mm, and the pingdu city cannot exceed 2mm.
4. All right-angle elbows in the air duct system software are equipped with silencing elbows, and there are galvanized iron plate drainage plates in the silencing elbows. The air duct insulation layer is made of polyethylene foam board, with a relative density of 40k g/m3 and a thickness of 35mm (the surface ambient temperature should not be lower than 5 degrees). The seams on the edge of the insulation layer should be made into steps or tenons and bonded with epoxy resin. Wrap the outer surface with aluminum foil cloth and stick it tightly with thermistor tape. The outer surface of the air duct shall not condense.
5. The air duct shall be compacted by mechanical equipment and sealed neatly, and the inner surface of the socket shall be coated with a large area of structural adhesive. The air duct is closely connected with the air outlet through a plastic hose with heat insulation layer. The air duct assembly shall be straight, the installation irregularity of the main air duct shall not be greater than 65438±0.5mm/m/m, and the pingdu city shall not be greater than 65438±0mm/m/m. Structural reinforcement of air duct: the circumference of square air duct shall be greater than or equal to 630mm, the circumference of thermal insulation air duct shall be greater than or equal to 800mm, and its pitch shall be greater than1.2m.