What Are Air Grilles?

Grille air vents can improve indoor air quality, reduce building energy consumption, and control local hot and humid environments in large spaces, and have gradually become an important direction for the development of air conditioning in office buildings. At the same time, new design of traditional air conditioning systems in office buildings is also proposed. challenge.

Grille vent

Right!

Grille air vents can improve indoor air quality, reduce building energy consumption, and control local hot and humid environments in large spaces, and have gradually become an important direction for the development of air conditioning in office buildings. At the same time, new design of traditional air conditioning systems in office buildings is also proposed. challenge.

Chinese name

Grille vent

Foreign name

air grille

Function

Improve indoor air quality, etc.

Location

Floor level setting

The traditional office building central air-conditioning grille tuyere system is: fan coil unit plus new fan unit air-conditioning system, centralized constant air volume air-conditioning system, and variable air volume air-conditioning system. These systems usually use ceiling air-supply (up-air) air-conditioning methods. It emphasizes that the airflow of the air is fully mixed with the indoor air. The air sent by the ceiling absorbs all the waste heat, humidity, and dilution of pollutants generated in the room. The temperature and humidity are basically the same in all spaces. This control method cannot well meet the different requirements of different users on temperature and ventilation in the same use space. Moreover, once the system is installed, it is not convenient to change the position of the air vents later as needed.

The grille air supply air outlet is generally set flush with the ground. The ground needs to be overhead. The lower space is used to arrange the air supply duct or directly used as the air supply static pressure box. The air supply enters the room through the floor air outlet and generates heat with the indoor air. After the mass exchange, it is discharged from the air outlet in the upper part of the room (above the ceiling or the work area). Since the 1970s, Europe has begun to apply to office buildings. Especially in the mid-1980s, the success of the Lloyd, s building in London, England, and HSBC in Hong Kong in the use of downdraft air-conditioning systems has aroused the attention of air-conditioning technology circles in various countries. At present, the research and application of grille air supply system in China is in its infancy.

2 The main difference between the grille air supply system and the traditional air supply system

In terms of cold and heat source equipment and air treatment equipment, the grille air supply system is similar to the traditional upper air supply system. The main difference of the grille air supply system is that it supplies air from the space below the floor; the temperature of the air supply during cooling is high (generally 17 ~ 18 ); different local climate environments can be formed in the same large space; The indoor airflow distribution is from the floor to the ceiling, and it is sent down and up and back.

3.1 Facilitate building refurbishment and renovation of existing buildings

When the use of the office changes and needs to be re-arranged and renovated, the air outlet provided on the raised floor is easy to change, and the space under the floor can facilitate the re-installation of power lines, communication lines, water pipes, etc., which can greatly reduce the cost of re-renovation . According to Japanese experience, labor alone can save 32% <1>. The floor air supply system can be used for building renovation. Although raising the floor will encounter problems such as the height of the floor, the adjustment of the stopping position of stairs and elevators, and the raising of the bathroom floor, these problems can be solved. In addition, the installation process of the static pressure box is a relatively dry process, and the damage to other building structures can be minimized.

3.2 Personal Control of Local Climate Environment

After the static pressure box is used to supply air, the diffuser is generally set flush with the ground to directly send air to the job. The user can control both the amount of wind and the direction of the wind, which obviously improves personal comfort. The use of static pressure box air supply makes the concrete floor a heat storage layer, thus reducing temperature fluctuations and peak cooling loads.

3.3 Improving air quality in the work area

Because the return air outlet is located on the suspended ceiling, the airflow organization form sent down and back will help to eliminate waste heat, humidity and pollutants from the use space, thereby ensuring higher ventilation efficiency and air quality in the work area.

English word for grill air vent: air grille Common abbreviations: RAG, EG, DG-A