What is a fresh air system

What is a fresh air system?What are the categories?

In order to pursue a healthy and quiet life, a simple and practical system came into being 70 years ago in European countries. 90% of their buildings were installed with this system. At present, this system has been widely used, which is the central fresh air system.This system is to continuously and efficiently circulate the indoor and outdoor air of the whole house for 24 hours without interruption, which is an air replacement system to ensure the indoor air quality.Ensuring fresh air in the room at all times, nicknamed "the respiratory system of the house".

Fresh air systems can be broadly classified into the following categories:

Semi-mechanical negative pressure fresh air system (one-way), full mechanical fresh air system (two-way), multi-point mechanical positive pressure air supply system, etc

Semi-mechanical negative pressure fresh air system

Half a mechanical pressure air system has been the industry known as one-way fresh air system, it through the air to the outside air, make indoor produce negative pressure, promoting outdoor air passes through the living room, sitting room, bedroom, etc into slowly into the interior, the ventilation system of air pollution by such as toilet discharge outside, achieve the goal of change of indoor air quality.Features: minimum air duct and power, simple, efficient, comfortable, economical, easy to clean, no secondary pollution.Suitable for families, small office buildings, apartments, hotel rooms, hospital wards.

All mechanical fresh air system

All-mechanical fresh air system is known as two-way fresh air system in the industry, which is divided into two cases: one is an energy-saving all-mechanical fresh air system with heat and cold exchange, which can recover about 70% of the heat.

Another mechanical fresh air system without heat and cold exchange.There are power and pipes in the air inlet and outlet, which supply air and exhaust air to the room through machinery and pipes, and the air exchange is large.Suitable for public places and places where people gather.

Multi-point mechanical positive pressure air supply system

The whole system only has air inlet, and only installed fans in the air inlet, forcing the air into the room, forming a positive pressure, the direction of the dirty air is not considered, forcing the dirty air out of the window, door gap and so on.

Ii. What are the characteristics of the fresh air system?

Saving energy and reducing consumption

Ultra-low energy consumption power system, operating power of 28W-70W, average daily consumption of only 0.7 KWH, to minimize operating costs.At the same time, ventilation without Windows, to avoid the winter heating and summer air-conditioning cooling energy loss, so that your daily expenses greatly reduced

Healthy environmental protection

365 days a year, 24 hours a day to provide fresh air for indoor, and will be harmful gases and a variety of bacteria, viruses and odor out of the outdoor, at the same time to remove water vapor, avoid walls, furniture mildew and damp, always keep indoor air healthy

Quiet and comfortable

The operating sound of the system is only 26.4 dB, and you don't have to endure the noise caused by opening the window, so that you can enjoy a quiet and comfortable living space!

Health dustproof

Completely avoid the air impurities and dust brought by the window, help you save tedious cleaning work, so that you have more time to enjoy life, entertainment and rest!

Highly efficient and stable

The system adopts the most advanced production technology in Europe to guarantee the continuous service life of up to 15 years. You don't need to worry about the frequent failure maintenance and repeated investment in the later period!

3. Why do we need a fresh air system?

A lot of decoration materials and furniture will send out substances harmful to health.

Carbon dioxide and water vapor are produced all the time in our daily life.

When ventilation is insufficient and humidity in the air increases, Guo Peng studies HVAC.The volatilization of harmful material is more serious, all sorts of mould also breed stealthily.

(4) Hot summer when we sit in the closed air conditioning room, the air will gather more and more harmful gases, mold

If you open the window for ventilation, dust, pollution and noise will drive straight in!

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What can the fresh air system do for the health of the family?

Remove the smell and steam from the bathroom and kitchen at any time.

You can enjoy the fresh air of nature without opening a window.

(3) Avoid the "air conditioning disease" widely discussed in the society.

(4) to prevent indoor furniture clothing mildew.

The long-term slow release of harmful gases after the elimination of indoor decoration at any time will bring sufficient fresh air of high quality, which is necessary for the maintenance of good health.

5. Can the volume of fresh air be controlled?

Yes, humanized adjustment function, to achieve a comfortable environment:

(1) By manual or automatic adjustment of the speed of the fan, you can quantitatively control the total ventilation of the whole house.

(2) by adjusting the opening degree of the vent can ensure that different positions in the room to achieve a reasonable wind pressure, to ensure that the amount of indoor air exchange.

The opening degree of air intake equipment can be adjusted at will, respectively control the air intake of each room, to meet the needs of different rooms use functions.

What are the advantages of ventilation system?

1) Organized exhaust

2) 24 hours of continuous ventilation

3) Quantitative design

4) Multi-link free adjustment

5) Less power consumption and less noise

6) Reduce outdoor pollution into the room

7) Shut out outdoor noise

8) The system is simple and has few pipelines

What are the disadvantages of the traditional ventilation system?

Open the window

Airflow blind, turbulence may be bathroom and kitchen between the odor into the living room and the bedroom;

(2) Carrying a large amount of dust, affecting indoor sanitation;

Can't avoid noise;

(4) In the use of heat and cold sources will cause a large amount of energy waste;

Toilet shaft may produce peculiar smell "backward irrigation" phenomenon.

fan

The instantaneous exhaust air volume is large, cannot continuously eliminate indoor peculiar smell;

(2) easy to damage, later maintenance costs increase;

(3) when open, not closed, can not continuously ventilation;

Large noise;

(5) When there is no fresh air introduction, the exhaust resistance increases, resulting in poor effect.

Small household central air conditioning

There is a return air outlet but cannot exchange with outdoor air;There is no exhaust air, so it is difficult for fresh air to enter the area with positive pressure.Taking fresh air can not completely improve the indoor air quality, dirty air can not be discharged quickly outside.

Viii. Design principles of fresh air System:

The quality of indoor air directly affects people's health. The advanced central fresh air system is designed according to three principles.

● Principle one: fresh air from the air more clean area living room, bedroom and so on into, by the dirty place discharge.Such as bathroom, toilet and kitchen discharge.

● Principle two: to meet the needs of People's Daily work, rest when the amount of fresh air, and at the same time to achieve the purpose of energy conservation.

● Three: 365 days a year, 24 hours a day uninterrupted ventilation.Central fresh air system, sewage fresh, create fresh, clean living environment, at the same time, give consideration to energy saving, environmental protection, safety and humanization.

Ix. Characteristics of centrifugal pipe fan:

(1) The air inlet and outlet of the fan are the same size, can be concentric with the ventilation pipe hoisting, using the straight air supply way, small installation space.

(2) The fan is equipped with European original imported external rotor motor, small volume, the use of fully closed structure, motor bearing for oil bearing, maintenance free, the insulation level of the motor reaches F level, the motor has speed regulation function, motor speed can be 0-100% stepless speed regulation.

(3) The fan shell is made of galvanized steel plate with high strength and anti-oxidation. It is equipped with mounting flange and connecting clamp to realize fast connection.

(4) the fan impeller for centrifugal impeller, high wind pressure, the air supply distance is far, through the computer for accurate static and static balance check, the fan smooth operation, no vibration, low noise fan.

The raw materials of the fan are all imported in original package and have passed the European CB quality inspection standard.

What is the meaning of a semi-mechanical negative pressure fresh air system?

The fresh air system is semi-mechanical negative pressure fresh air system.That is, the air is vented to the outside through a fan, so that the indoor negative pressure is generated and the outdoor air slowly flows into the room through the air inlet, without the need for mechanical air supply.This fresh air system is the most simple, efficient and comfortable system for the house.

What advantages does the semi-mechanical negative pressure system have

Compared with the whole mechanical fresh air system or the positive pressure system with multi-point mechanical air supply, the inlet air of the residential negative pressure fresh air system is not only free from the problem of secondary pollution in the pipeline, but also has low noise and low operating cost.It can also prevent indoor air from permeating into walls and furniture under the positive pressure system, causing mold and harmful gas emission.

What are the advantages of the fresh air system over the tropical recovery system?

There is no heat recovery in the fresh air system, but the advantage is that the system is very simple and the exhaust pipe is minimized.The air inlet does not pass through the pipe, which not only saves space and costs, but also does not produce secondary pollution and noise caused by mechanical and pipe air supply.The advantage of the system with heat recovery is that it is energy efficient and can recover 70% of the heat.

13. What is the difference between the fresh air system and the central air conditioner?

Although the central air conditioner is equipped with a return air outlet, it cannot exchange with outdoor air.There is no exhaust, so it is difficult to bring in fresh air in the area where positive pressure has been formed.Slightly fresh air can not completely improve the air quality, dirty air can not be discharged quickly outside.

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