How does the negative pressure fan cool us? What is the principle? Today I would like to give you a detailed introduction. I hope you can clarify these issues.

　　負壓風機應用機械動能強迫使室內空氣排出室外，使室內氣壓降落，室內空氣變稀薄，構成一個負壓區，空氣由于氣壓差補償流入室內。在工業廠房實踐應用中，負壓風機集中裝置于廠房一側，進氣口于廠房另外一側，空氣由進氣口到負壓風機構成對流吹風。

　　The negative pressure fan uses mechanical kinetic energy to force the indoor air to discharge outdoors, which makes the indoor air pressure drop and the indoor air become thinner, forming a negative pressure area. The air flows into the room due to the compensation of the air pressure difference. In the practical application of industrial plant, the negative pressure fan is centralized on one side of the plant, the air inlet is on the other side of the plant, and the air is convective blown from the air inlet to the negative pressure fan.

　　在這個過程中，靠近負壓風機左近的門窗堅持關閉，強迫空氣由進氣口一側門窗補償流入車間。空氣排著隊、有次序的由進氣口流入車間，從車間流過，由負壓風機排出車間。換氣徹底、，換氣率可高達99左右%。

　　In this process, the doors and windows close to the left side of the negative pressure fan are kept closed, forcing air to flow into the workshop by compensating the doors and windows on the side of the intake port. The air flows into the workshop in line and in sequence from the intake port, flows through the workshop, and is discharged from the workshop by the negative pressure fan. The ventilation is thorough and efficient, and the ventilation rate can be as high as about 99%.

　　經過這樣的原理，配上依據需求設計換氣速度微風速的設計、讓車間高熱、有害氣體、粉塵煙霧均能疾速排出車間，通風不良問題均能一次性徹底處理。從開啟風機的幾秒鐘內即可到達通風的效果。

　　Through this principle, with the design of ventilation speed and breeze speed according to demand, the workshop can rapidly discharge high heat, harmful gases, dust and smoke, and the problem of poor ventilation can be thoroughly dealt with at one time. Ventilation can be achieved within seconds of opening the fan.

　　一、換氣降溫：由于陽光映照建筑物、機器設備、人體等熱源招致需求通風的場所氣溫高于室外。負壓風機能將室內熱氣疾速排出，讓室溫和外界溫度持平，不于車間內溫度不流通持續升高。

　　1. Air exchange and cooling: The temperature of places requiring ventilation is higher than that of outdoors because of the heat sources such as buildings, machinery and equipment, human body, etc. which are reflected by sunlight. Negative-pressure fan can expel the hot air from the room rapidly, so that the room temperature and the outside temperature are equal, so as not to keep the temperature in the workshop from rising continuously.

　　二、空氣活動帶走人體熱量，空氣活動加速汗液蒸發而吸收人體熱量，從而讓人體覺得涼快，和自然風一樣涼快。

　　2. Air activity takes away human heat. Air activity accelerates sweat evaporation and absorbs human heat, which makes the human body feel cool, as cool as natural wind.

　　三、負壓風機只要通風降溫的作用，沒有制冷的功用，對人體安康無傷害，安康。

　　3. As long as the negative pressure fan has the function of ventilation and cooling, it has no function of refrigeration, and does no harm to human health, health and environmental protection.

　　負壓風機假如能配合降溫濕簾運用的話，在夏季酷熱的時分可將車間內溫度控制在28攝氏度左右。但人體的涼快覺得可與空調相比，由于采取的是自然風，稍長時間對著水簾的人會覺得神清氣爽不易疲倦。

　　If the negative pressure fan can cooperate with the cooling and wet curtain, the temperature in the workshop can be controlled at about 28 degrees Celsius at the hottest time in summer. But the cooling of the human body can be compared with air conditioning. Because of the natural wind, people facing the water curtain for a long time will feel refreshed and not tired.