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I believe that many friends have seen similar pictures, they "represent" the difference between the two different air supply methods of fresh air, but is it really as shown in the figure in actual use?Today, let's share it together"Top send back to back".with"Ground to the top back".Advantages and disadvantages of two different air supply methods.
part 01Top send back method
As the name suggests, it isBoth the air supply and return air outlets are installed on the top of the roomWhen the equipment is running, the outdoor fresh air is sent into the room from the top, and the indoor dirty air is discharged outside through the top return air outlet. Top sending back is currently the most common installation method for fresh air on the market。The installation diagram is as follows:
The picture shows the installation schematic diagram of the top return mode of Nuno Fresh Air Shutian series).
Due to the current domestic ordinary residential floor height is mostly in 2About 7 meters, generally not very high, andThanks to the popularization of PE air ducts and the implementation of the "one pipe to the end" installation methodThe installation method of top sending back has strong practicability, and its advantages have also been well played.
The picture shows a schematic diagram of the airflow of the top feed and top return mode).
Advantages of top send back and back
The wind damage is small, and the air exchange speed is fast:p e round pipes are smooth on the inside, and the pipes leading to the interior are usually one pipe to the end, soThe whole system has a higher air yield, less wind loss, and faster air exchange
Easy installation and construction: Because the top air supply method does not cross with floor heating, etc., and there are fewer connecting accessories, the installation and construction method is simpleIt has great advantages in terms of cost, construction and maintenance
Does not affect the height of the floorThe top air supply is carried out by piercing the beams and punching holes, without the need to lay pipes or equipment on the ground, and will not occupy valuable floor space.
Disadvantages of top send back and back
The punching is not standardized, which affects the safety of the structureDue to the strict specification requirements for the openings on the beams, such as the openings are too large, or there are many holes side by side, it will have an impact on the safety of the house structure.
The top tubing takes up a lot of space: The return air ducts are hidden and installed in the ceiling, there are more pipes, and the top pipes occupy more space, but they will not affect the floor height.
The ventilation efficiency is slightly lower than that of the ground feed top back: Because clean air is lighter than dirty air, the top feed and top return method is more likely to appear that the top layer of air circulation is faster, a part of the fresh air will be discharged, and the ventilation efficiency will be slightly lower.
However, some of the above shortcomings are not unavoidable, such as the diagonal design of the indoor return air outletIncrease the air supply power and reduce the return air power, so that the air sent into the room can squeeze out the indoor air and dilute the dirty airAfter a long time, it can achieve the effect of indoor air purification.
part 02Ground delivery top return mode
Ground sent back to the top, ieThe air supply outlet is installed on the ground level, while the return air outlet is installed on the top of the roomWhen the equipment is running, the outdoor fresh air is sent out from the ground, and the indoor dirty air is discharged outside through the top return air outlet. In principle, the ground top return method is more scientific and reasonable。The installation diagram is as follows:
The picture shows the installation schematic diagram of the top return mode of Nuno fresh air).
The ground top return adopts the method of delivering fresh air from the ground to the indoor, on the one hand, it can be enjoyed at the fastest speed, and on the other hand, it will also dilute the indoor dirty air quickly, and can be constitutedThree-dimensional diagonal airflow in the house, so that the indoor air can be fully purified, and the dirty air can be discharged from the room in a relatively short time.
The picture shows a schematic diagram of the airflow of the ground top return mode).
The advantages of the ground to the top back
Three-dimensional diagonal airflow, uniform and reasonable: The air circulation mode of the ground top return is more scientific and reasonable, and the air flow is more uniform (see the schematic diagram above).
The air supply vent is on the ground, making it easier to clean: The ground air supply tuyere is installed on the groundIt is easy to disassemble and clean, and it is more convenient to clean
The ventilation efficiency is higher: Thanks to the three-dimensional diagonal airflow design, the outdoor fresh air flows upwards from the ground, squeezes the dirty air upwards, and the top return air outlet quickly extracts the dirty air and discharges itIn the case of the same air rate, the ventilation efficiency is higher than that of the top feed back and back。(In fact, it is difficult to achieve the same air yield as the top air supply.) ）
Disadvantages of ground sending top back
Occupy the ground floor high, and the construction cost is high: The installation of ground air duct is bound to occupy the height of the floor, raise the ground, and need to be slotted, the construction is difficult, and the cost is high.
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The wind damage is large, and the requirements for the host are high: The ground air duct is mostly flat pipe, which needs to be matched with various deformations and turning heads, resulting in large wind resistance, difficult to guarantee the air supply volume, and high requirements for the performance of the host.
It is easy to generate dust: Since dust and dander are gathered below 30 cm on the ground, the ground air supply will raise the dust and affect breathing.
Of course, the ground top return air supply method has its advantages, but it is also inevitable that there are certain shortcomingsThe requirements for air supply capacity and design and construction are relatively high, due to the air supply tuyere on the ground,It is necessary to avoid sofas, etcetc.;However, if floor heating is installed and the form of floor air supply is adopted, the efficiency of its floor height can be maximized.
The figure shows the schematic diagram of the cross-layer installation using the ground to send the top back).
Of course, there are many more ways to install it in practical applications, eg"Top to the ground", "Wall to the top", "Mixed air".and other forms, in view of various reasons such as construction difficulty, cost, and airflow rationalityFewer apps are installed in the home.
This article represents the author's personal point of view, if there are any errors or omissions, please leave a message to correct!