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What are the characteristics and cooling principles of negative pressure fans?

Source： Time：2024-07-08 14:43:39 views：

Negative pressure fan is a new type of ventilation fan, belonging to axial flow fan, which is mainly used in negative pressure ventilation and cooling projects and is calledsuction fan . The negative pressure ventilation cooling project includes both ventilation and cooling aspects, and solves both ventilation and cooling problems simultaneously. Negative pressure fans are also used in positive pressure water curtain environmental air conditioning, positive pressure air supply, positive pressure blowing and other fields. Negative pressure fans have the characteristics of large volume, ultra large air duct, ultra large blade diameter, ultra large exhaust volume, ultra-low energy consumption, low speed, and low noise.suction fan From the perspective of structural materials, it is mainly divided into galvanized sheet square negative pressure fans and fiberglass horn shaped fanssuction fan . All galvanized sheet square negative pressure fans on the market have similar structures and technical parameters, and the classification of negative pressure fan models will be explained in detail. Fiberglass horn shaped negative pressure fans are divided into belt type and direct type according to their transmission methods. The classification of negative pressure fan models will be explained in detail.

Principle of negative pressure fan ventilation

The negative pressure fan exhausts air outward, causing a decrease in indoor air pressure and thinning of indoor air,
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Characteristics of negative pressure fan

Create a negative pressure zone where air compensates for the pressure difference and flows into the room. In practical applications in industrial plants,suction fan Concentrated installation on one side of the factory building, with the air inlet located on the other side of the building. The air flows through the inlet to the negative pressure fan to form convective blowing. During this process, the doors and windows near the negative pressure fan remain closed, forcing air to flow into the workshop through the compensating doors and windows on the intake side. The air flows into the workshop in an orderly manner through the air inlet, passes through the workshop, and is discharged from the workshop by a negative pressure fan. The ventilation rate can reach up to 99%. Through specific engineering design and the design of ventilation speed and velocity as needed, high heat, harmful gases, dust and smoke can be quickly discharged from the workshop, and poor ventilation problems can be solved in one go. From openingFanThe ventilation effect can be achieved within a few seconds.

Principle of cooling by negative pressure fan

1、 Ventilation and cooling: Due to sunlight shining on buildings, machinery and equipment, human bodies and other heat sources, the temperature in places that require ventilation is higher than outdoors.suction fan It can quickly dissipate indoor heat, keeping the room temperature at the same level as the outside temperature, and preventing the temperature in the workshop from rising. 2、 Air flow takes away human body heat, accelerates sweat evaporation and absorbs human body heat, making the human body feel cool, just like natural wind. IIIsuction fan It only has the function of ventilation and cooling, without the function of refrigeration. Coolness is the feeling of the human body.suction fan The statement of how much temperature can be lowered is ignorant. 4、 When used in conjunction with a water curtain, the temperature in the workshop can be controlled within 28 degrees Celsius during hot summers. But the coolness of the human body can be compared to air conditioning, and people who face a water curtain for a longer time may feel cold and unable to tolerate it.

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