通風管道的通風準則要注意什么？

發布人：http://www.bnlfans.net   發布時間：2023-02-28 19:25:53

想要完結通風管道的全盤通風，就無妨欺詐機械通風，也無妨欺詐通風來完結。按體系持征差異，全盤通風可分為全盤送風，全盤排風和全盤送、排風三類。按效果機理差異，全盤通風可分為稀釋通風和置換通風兩類。

If you want to complete the overall ventilation of the ventilation duct, you can neither cheat mechanical ventilation nor cheat ventilation to complete. According to the difference of system characteristics, the overall ventilation can be divided into three categories: overall air supply, overall air exhaust and overall air supply and exhaust. According to the difference of effect mechanism, total ventilation can be divided into dilution ventilation and displacement ventilation.

1、稀釋通風

1. Dilution ventilation

稀釋通風又稱攙雜通風，即送人比室內污染物濃度低的空氣與室內空氣攙雜，以此下降室內污染物的濃度，抵達衛生標難。

Dilution ventilation, also known as mixing ventilation, is to send air with lower concentration of indoor pollutants to mix with indoor air, so as to reduce the concentration of indoor pollutants and reach the sanitary standard.

2、置換通風

2. Displacement ventilation

在置換通風體系中，鮮美冷空氣由房間底部以很低的速度送入，送風溫差僅為2—4Y。送入的鮮美空氣因密度大而像水相同彌散悉數房間的底部，熱源導致的熱對流氣流使室內發生筆直的溫度禪度，氣流遲緩上升，脫節作業區，將余熱和污染物推向房間頂部，由設在頂棚上或房間頂部的排風口直接掃除。

In the displacement ventilation system, fresh and cold air is sent from the bottom of the room at a very low speed, and the temperature difference of the air supply is only 2-4Y. Due to the high density of the fresh air sent in, it diffuses at the bottom of all rooms like water. The heat convection air flow caused by the heat source causes a straight temperature rise in the room. The air flow rises slowly, disjoint the operation area, push the waste heat and pollutants to the top of the room, and directly sweep away by the exhaust outlet on the ceiling or the top of the room.

室內空氣近似活塞狀活動，使污染物隨空氣活動從房間頂部掃除，作業區根本處于送入空氣中，即作業區污染物濃度約等于送人空氣的濃度，這是置換通風與傳統的稀釋全盤通風的很大別離。在通風管道中，顯著置換通風的通風成效比稀釋通風要好。

The indoor air moves like a piston, so that the pollutants are swept from the top of the room along with the air movement. The operation area is basically in the air, that is, the concentration of pollutants in the operation area is about equal to the concentration of the air sent. This is a big difference between displacement ventilation and traditional dilution ventilation. In the ventilation duct, the ventilation effect of significant displacement ventilation is better than that of dilution ventilation.

3、片面通風

3. One-sided ventilation

片面通風便是欺詐片面氣流，使片面當地不受有害物的污染，構成優異的空氣環境。

One-sided ventilation is to cheat one-sided air flow, so that one-sided local is not polluted by harmful substances, and form an excellent air environment.

片面通風體系分為片面送風和片面排風兩大類。片面排風是將污染物當場捕集、凈化后排放室外。片面送風是將始末處理的、契合要求的空氣送到片面作業當地，以確保片面區域的空氣條件。片面通風辦法作為確保作業和生計環境空氣品性、防備室內環境污染的技藝對策應優先研究。

One-sided ventilation system is divided into one-sided air supply and one-sided exhaust. One-sided exhaust is to capture and purify pollutants on the spot and then discharge them to the outside. One-sided air supply is to send the air that meets the requirements from the beginning to the end to the one-sided operation area to ensure the air conditions in the one-sided area. The one-sided ventilation method should be given priority as a technical countermeasure to ensure the air quality of the working and living environment and prevent indoor environmental pollution.

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