What is a negative pressure fan? What are the advantages of negative pressure fans in greenhouse? The industrial exhaust fan utilizes the basic principle of air convection. The motor promotes the rotation of the blade fan to exhaust the indoor air quality out of the greenhouse. Negative working pressure is generated in the greenhouse, and outdoor gas enters the room under the effect of working pressure. Therefore, the cooling fan has a negative working pressure.
Precautions for use of negative pressure fan:
1. Total number of industrial exhaust fans installed.
In the application of greenhouse greenhouses, the key is to cooperate cooling with cooling fans and water curtains. Therefore, everyone should use the total number of paired cooling fans based on the basic theory of application and installation of cooling fan water curtains. According to the natural ventilation benchmark, the total number of cooling fans should be naturally ventilated once within 2 minutes to calculate the total number of cooling fans.
Installation position of industrial exhaust fan.
Generally, the orientation of the multispan greenhouse greenhouse is from the north to the south, and the cooling fan is installed on the south building facade. The installation height to width ratio is generally located in the middle of the greenhouse, and it is not suitable to be too low because warm air converges on the upper end, but it cannot be installed above. We also considered the path of strong cold air coming in from the water curtain directly opposite.
Advantages and disadvantages of negative pressure fan:
Integrating natural ventilation, natural ventilation, and temperature reduction, it is environmentally friendly and energy-saving: it consumes less power, requiring only 10% to 15% of traditional central air conditioners. Environmental protection: no air conditioner CFC. Greenhouses are the most economically developed, with a natural ventilation rate of over 90%. Especially after the use of water curtains, the room temperature can be rapidly reduced by 5-10 degrees. The problem is that the industrial exhaust fan makes a certain amount of noise.
1. Convenient installation, negative pressure fan without motor, no power consumption, no noise, small size, light weight, high exhaust efficiency, and convenient installation. Save you a lot of manpower and material resources.
2. The negative pressure fan has a long service life and can operate for at least ten years, benefiting from more than ten years;
3. Without electricity, use temperature difference and natural wind to rotate the negative pressure fan. Only gentle winds or indoor and external temperature differences can easily drive the turbine blades to rotate continuously for 365 days, without any electricity. High sensitivity, saving a lot of operating costs;
4. High efficiency, the negative pressure fan only requires a small amount of air, which is very effective in improving the working environment and efficiency of the factory. It can bring you fresh air convection, eliminate hot air, exhaust or odor.
5. Maintenance-free and maintenance-free, the negative pressure fan adopts a complete set of fully sealed high-end bearings, which do not require lubrication and are sturdy and durable.6. Widely used, negative pressure fans are widely used in industries such as agriculture, animal husbandry, industry, and public places, making important contributions to improving the environment.
Negative pressure fan is a new type of fan mainly used for negative pressure ventilation and cooling engineering. It is mainly installed outside the workshop window. Generally, the lower air outlet is chosen to extract air and odor. Almost all areas that require ventilation are acceptable. Now, let’s take a look at the seven advantages of negative pressure fans with the editor.
1. The outer frame of the negative pressure fan adopts traditional processing technology and has a relatively thin thickness.
2. A new folding fan and a reasonable blade angle flushing fan can achieve high air volume.
3. Sandblasting multiple ribbed pulleys to improve the appearance of the negative pressure fan, increase internal stress, and increase strength.
4. The outer frame and louver are formed with galvanized steel plates, the fan blades are stamped in one go, fastened with forged screws, and checked for balance by computer.
5. The negative pressure fan has low noise, large air volume, low power consumption, and obvious cooling effect, and can be used for hair blowing and exhaust.
