The best method of indoor ventilation

The best method of indoor ventilation, after closing the doors and windows, the indoor air will become more and more turbid, and the ventilation effect will not be achieved. Living in fresh air can make us feel happy and healthy, so be well ventilated and let you live in a place with fresh air. The best method of indoor ventilation.

The best method of indoor ventilation is 1 1. Open the doors and windows.

You can directly open the doors and windows for ventilation, which is the simplest and most basic method. When opening the window for ventilation, you can turn on the electric fan to blow against the doors and windows, which will accelerate the convection between the air and accelerate the indoor ventilation. Don't open the window when the weather is bad, lest dust fall into the room.

2. Ventilation equipment

Ventilation fan is a common ventilation mode except window ventilation. Ventilation fans are widely used in public places such as family toilets, kitchens, restaurants, cinemas and cafes. The advantage of ventilator is that it can ventilate indoors without opening windows, but the ventilation efficiency is not high because of the different specifications of ventilator.

3. Air purifier

The air purifier actually purifies the air and then releases it, so it is also a kind of ventilation. The air purifier is suitable for home use or places with few people. You can rely on activated carbon for ventilation and adsorption, or you can add a little essential oil to replace the air and make the surrounding air more humid.

A, the room is not well ventilated, how to take a breath?

1, if possible, it is best to open the window for ventilation, and the north and south windows should be opened to form airflow. In addition, you can turn on the ceiling fan or electric fan at home and turn the electric fan outward, which can accelerate the circulation of air and bring better ventilation effect.

But if there are no conditions and no windows, there will be no circulation between north and south. In this case, if there is an exhaust fan in the room, it can be turned on and ventilated. Really can't. Install an exhaust fan later to keep the indoor air fresh all the time.

3. You can also put a pot of water in the room, or directly sprinkle the water on the ground, or dry the hot air in time to keep the air cool.

4. Another method is to install a fresh air system, which can effectively replace the air, blow outdoor air into the room, or blow indoor air into the outside to form convection, thus effectively achieving the purpose of ventilation.

Second, the function and role of fresh air system

1. The fresh air system can blow outdoor air into the room through special equipment. Through the function of filtration, the indoor air is discharged outside, so as to achieve the purpose of ventilation balance. Even if the doors and windows are closed, air convection can be formed, and there is no need to open windows for ventilation.

There are two kinds of it, one is one-way and the other is two-way. If it is unidirectional, it cannot be exhausted by machinery and equipment. But in both directions, air supply and exhaust need to go through the machine, which is more efficient and of course more expensive.

The best method of indoor ventilation 2 is generally divided into four categories.

1. Window ventilation is easy to understand as seen in the title. Advantages: the most economical, economical and easy-to-understand ventilation mode. However, the shortcomings are also obvious: the indoor airflow is disordered, and it is easy to bring the odor of the bathroom and kitchen to the living room and bedroom; Mixed with outdoor particulate dust pollutants, affecting indoor environmental sanitation; Inevitable noise pollution; The temperature loss of indoor heating or cooling causes energy waste to some extent.

2, exhaust fan ventilation exhaust fan can have a good exhaust effect when there is no wind, but the shortcomings are still obvious: the scope of action is too small, the continuous ventilation ability is poor, it is easy to produce noise, easy to damage, and the later maintenance is gradually increasing. Let's talk briefly about air conditioning. The indoor and outdoor ventilation capacity of traditional air conditioners is poor. In recent years, the air conditioning of fresh air system has a certain ventilation and exhaust volume, but when the room reaches positive pressure, the continuous exhaust volume will gradually decrease. And the price will be higher than that of ordinary air conditioners.

3, air purification air purifier: can only absorb dust and other particulate matter in the air, can not eliminate harmful molecules, even if repeated treatment, the effect is still very poor. Air disinfectants and air fresheners: after being sprayed indoors, they are mixed with the originally polluted air, which is equivalent to painting a "disguise" indoors, paralyzing people's noses and smelling like "stealing clocks". Pollution can not only be cured, but also cause secondary pollution, making indoor air worse. Freon is also the destroyer of the atmospheric ozone layer.

Air dialysis: The air dialysis system has low running noise. Indoor dirty air is exhausted by the exhaust fan, and then outdoor air is introduced into the room by the induced draft fan through the air supply pipeline. Purify the air by high-temperature sterilization, filter screen filtration and other technologies, and transport the purified air to all rooms.

4. The closed indoor side of the fresh air system uses special equipment to send fresh air into the room, and then it is discharged to the outside from the other side by special equipment, which will form the principle of "fresh air flow field" indoors, thus meeting the needs of indoor fresh air ventilation. Many advantages, quiet, excellent ventilation, beautiful appearance and strong concealment; But the investment is large.

The best method of indoor ventilation. First of all, open the window for natural ventilation.

Natural ventilation is driven by hot pressure generated by indoor temperature difference and wind pressure generated by outdoor wind, which does not need additional power input. It has the advantages of zero energy consumption, silence and simple maintenance, and is the first choice for all residential ventilation schemes when technology is feasible.

According to the different forms of air intake, natural ventilation can be divided into: 1) natural ventilation with windows and 2) natural ventilation with ventilators.

Natural ventilation with windows is the most commonly used and basic ventilation method in residential buildings. Frequent window ventilation can keep the indoor air fresh. Especially in the case of through flow, natural ventilation with windows is a more efficient ventilation method.

The advantages of natural ventilation with windows are economic and energy-saving, which can not only ensure sufficient indoor oxygen, but also reduce the concentration of CO2, prevent human body from lack of oxygen, and effectively remove harmful gases such as formaldehyde, benzene and TVOC. It is a ventilation measure that all houses should take to open windows frequently to keep the air circulating.

The disadvantage of window ventilation is that it is greatly influenced by the outdoor environment: on the one hand, outdoor air pollutants will quickly spread to the room in large quantities, causing indoor air pollution; On the other hand, outdoor noise can not be effectively reduced, which directly affects the life, study, work and rest of indoor personnel. In the winter in the north, opening the window for ventilation will also make the outdoor cold air pour into the room, which is extremely uncomfortable. Therefore, people will try to avoid opening windows for ventilation, resulting in extremely poor indoor air quality. In addition, the window ventilation should also consider issues such as theft prevention and insect prevention.

Second, naturally ventilate with a ventilator.

The natural ventilation mode with ventilator is to use ventilator instead of window ventilation. The general practice of this ventilation mode is to install window ventilators above/below the windows in the bedroom and living room, and at the same time, set up unpowered exhaust systems in the bathroom and kitchen, and rely entirely on hot pressing/wind pressure to drive ventilation. In order to ensure the ventilation effect, the resistance of the exhaust duct should be as small as possible and the vertical height difference of the exhaust duct should be large enough. When using this ventilation mode, the windows can be closed at ordinary times, which effectively solves many shortcomings of window ventilation.

1, window type natural ventilator,

2. Grille vents (louvers are installed under bathroom door),

3. Indoor air outlet,

4. Exhaust hood

The window type natural ventilator is provided with a filtering and dust removal layer, which can filter out the large particles in the fresh air and ensure the cleanliness of the fresh air entering the room.

The main disadvantages of natural ventilation with ventilator are that the ventilation volume is small, which can only ensure the minimum fresh air volume needed for breathing and cannot effectively eliminate indoor air pollutants; In addition, this ventilation method has limited filtering effect on fresh air and cannot effectively remove PM2.5 in fresh air.

Third, the exhaust fan/exhaust fan ventilation

Exhaust fan (exhaust fan) ventilation is also called mechanical assisted natural ventilation. This ventilation mode is the same as the natural ventilation in the air intake part, except that the power exhaust equipment is added in the exhaust part, which requires a certain amount of electric energy, but the reliability and controllability of ventilation are enhanced.

1, window type natural ventilator,

2. Grille vents (louvers are installed under bathroom door),

3. Indoor air outlet,

4, exhaust hood,

5. exhaust fan,

6. muffler,

7. Power control system,

8. Airway

Mechanical-assisted natural ventilation can meet the ventilation needs of most houses, and the system is relatively simple and easy to operate, which can ensure the indoor fresh air volume. Compared with natural ventilation, it only increases the electromechanical consumption of the exhaust fan during operation, which is more economical.

Mechanical-assisted natural ventilation and natural ventilation have the same disadvantage that fresh air cannot be effectively filtered. When the air pollution is serious (such as foggy days, PM2.5 exceeds the standard), the cleanliness of fresh air cannot be guaranteed, but it will aggravate indoor air pollution.

Fourth, the home fresh air system.

Household fresh air system is mainly composed of fresh air fan, air supply/exhaust duct and air supply/exhaust terminal, which provides fresh air for indoor use. Because the air filter is installed in the fresh air unit, it can effectively filter PM2.5, ensure the cleanliness of fresh air, and provide fresh and clean air stably even in foggy days.

Household fresh air system can be divided into one-way fresh air system and two-way fresh air system. Among them, the one-way fresh air system has simple structure, less space occupied by main engine and pipeline, and lower purchase cost. The structure of two-way fresh air system is relatively complex, the main engine and pipeline occupy a large space, and the purchase cost and maintenance cost are high, but the heat exchange module can be added inside the main engine.

At present, the popular household fresh air system adopts fresh air total heat exchanger. The outdoor fresh air is filtered to remove PM2.5, and then passes through the total heat exchange module. The filtered fresh air is exchanged with the indoor exhaust air in the total heat exchange module, and the cold/heat in the exhaust air is recovered (the heat exchange rate is generally more than 60%, even as high as 90%, saving energy consumption of air conditioning/heating), and finally sent indoors.

When purchasing fresh air total heat exchanger, we should pay attention to whether it has bypass function. Only fresh air total heat exchanger with bypass function can save energy better, otherwise its energy consumption may be higher than that of ordinary fresh air fan without total heat exchange module [1].

The fresh air unit of domestic fresh air system will produce noise and vibration during operation, so it is necessary to choose a suitable space to install the fresh air unit and take measures to reduce noise and vibration. Because the domestic fresh air system needs to overcome the resistance of air filter (usually medium effect air filtration) and air supply/exhaust pipeline, its power consumption will be much larger than that of mechanically assisted natural ventilation.

Verb (abbreviation of verb) wall-mounted fresh air system

Wall-mounted fresh air system is a kind of fresh air system hanging on the wall, and its principle is similar to that of domestic fresh air system. However, compared with the domestic fresh air system, the wall-mounted fresh air fan is smaller, has no air supply duct and is easier to install. After the room is decorated, it can be installed. Just open 1 or two holes with the diameter of 10 cm on the wall, and the installation and construction are very convenient, which can be completed by ordinary plumbing workers.

The wall-mounted fresh air system has the advantages of simple installation, high cost performance and good fresh air effect, and has a good performance in small and medium-sized families and small places.