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.
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.
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%.
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.
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.
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.
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.
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.