专注通风管道加工·排烟罩

To complete the complete ventilation of the ventilation duct, there is no harm in deceiving mechanical ventilation or deceiving ventilation to complete it. According to the differences in system characteristics, overall ventilation can be divided into three categories: overall air supply, overall exhaust, and overall air supply and exhaust. According to the differences in effectiveness mechanisms, overall ventilation can be divided into two categories: dilution ventilation and displacement ventilation. So what are the mechanical ventilation guidelines for ventilation ducts?

1、稀释通风

1. Dilution ventilation

稀释通风又称搀杂通风，即送人比室内污染物浓度低的空气与室内空气搀杂，以此下降室内污染物的浓度，抵达卫生标难。

Dilution ventilation, also known as mixed ventilation, refers to the mixing of air with a lower concentration of indoor pollutants, in order to reduce the concentration of indoor pollutants and achieve hygiene standards.

2、置换通风

2. Displacement ventilation

在置换通风体系中，鲜美冷空气由房间底部以很低的速度送入，送风温差仅为2—4Y。送入的鲜美空气因密度大而像水相同弥散悉数房间的底部，热源导致的热对流气流使室内发生笔直的温度禅度，气流迟缓上升，脱节作业区，将余热和污染物推向房间顶部，由设在顶棚上或房间顶部的排风口直接扫除。

In the displacement ventilation system, fresh and cold air is fed in at a very low speed from the bottom of the room, with a temperature difference of only 2-4Y for the supply air. The fresh air sent in is as dense as water and diffuses at the bottom of all rooms. The heat generated by the heat source causes a direct temperature rise in the room, causing the airflow to slowly rise and detach from the working area, pushing waste heat and pollutants towards the top of the room, which is directly swept away by the exhaust vents located on the ceiling or at the top of the room.

室内空气近似活塞状活动，使污染物随空气活动从房间顶部扫除，作业区根本处于送入空气中，即作业区污染物浓度约等于送人空气的浓度，这是置换通风与传统的稀释全盘通风的很大别离。在通风管道中，显着置换通风的通风成效比稀释通风要好。

The indoor air moves in a piston like manner, allowing pollutants to be swept away from the top of the room with the movement of the air. The working area is fundamentally in the incoming air, which means that the concentration of pollutants in the working area is approximately equal to the concentration of the incoming air. This is a significant difference between displacement ventilation and traditional dilution ventilation. In ventilation ducts, the ventilation effect of significant displacement ventilation is better than that of dilution ventilation.

3、片面通风

3. One-sided ventilation

片面通风便是欺诈片面气流，使片面当地不受有害物的污染，构成优异的空气环境。

One sided ventilation is the act of deceiving one sided airflow, preventing local pollution from harmful substances and creating an excellent air environment.

片面通风体系分为片面送风和片面排风两大类。片面排风是将污染物当场捕集、净化后排放室外。片面送风是将始末处理的、契合要求的空气送到片面作业当地，以确保片面区域的空气条件。片面通风办法作为确保作业和生计环境空气品性、防备室内环境污染的技艺对策应优先研究。

The one-sided ventilation system is divided into two categories: one-sided air supply and one-sided exhaust. One sided ventilation is the process of capturing and purifying pollutants on the spot before discharging them outdoors. One sided air supply is the process of delivering air that meets the requirements from the beginning to the end to the area where one sided operations are carried out, in order to ensure the air conditions in the area. The one-sided ventilation method should be prioritized as a technical countermeasure to ensure the air quality of the work and livelihood environment and prevent indoor environmental pollution.

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