Negative pressure fans and environmental protection air conditioners discharge air to make indoor air pressure drop, indoor air becomes thinner, forming a negative pressure area, air due to pressure difference compensation into the room. In the practical application of industrial plants, the negative pressure fan is installed on one side of the plant, and the air inlet is on the other side of the plant, and the air from the air inlet to the negative pressure fan forms a convection secondary wind. In this process, the doors and Windows close to the negative pressure fan are kept closed, and forced air is compensated by the door and window on one side of the air inlet into the workshop. The air is lined up and orderly from the air inlet into the workshop, flows through the workshop, and is discharged from the workshop by the negative pressure fan. Thorough and efficient ventilation, ventilation rate up to 99%. Through specific engineering design, according to the need to design ventilation speed and wind speed, any high heat, harmful gases, dust smoke dew can be quickly discharged from the workshop, any poor ventilation problems can be solved once and for all. Ventilation can be achieved within seconds of starting the fan.

Negative pressure fan cooling principle

    1. Ventilation and cooling: the air temperature in places requiring ventilation is higher than outdoor due to the sunlight shining on buildings, machinery and equipment, human body and other heat sources. The negative pressure fan can discharge the indoor hot air quickly, so that the room temperature and the outside temperature is flat, so as not to increase the temperature in the workshop.

   2.air flow takes away heat from the human body. Air flow accelerates the evaporation of sweat and absorbs heat from the human body, thus making the human body feel cool, just as cool as the natural wind.

   3. negative pressure fan only ventilation cooling function, no refrigeration function, cool is the feeling of the human body. It is unscientific to say how much temperature a negative pressure fan can drop.

   4. When used with water curtain, the temperature in the workshop can be controlled within 28 degrees Celsius in the hottest days of summer. But the cool feeling of the human body can be compared with air conditioning, slightly long time to the water curtain people will feel cold and can not stand.