How to install a negative pressure fan to achieve good ventilation effect

Release time: 2022-12-07

When installing a negative pressure fan, it is important to do a good job of installation, especially without gaps around the fan. When installing a negative pressure fan, it is best to close all the surrounding doors and windows, but the doors and windows on the opposite wall should be opened to ensure the flow of air. The installation of negative pressure fans is very important and directly affects their future use.
suction fan 
Before installing the negative pressure fan, carefully check whether the negative pressure fan is intact, whether the fastening bolts are loose or falling off, and whether the impeller collides with the fan cover. Carefully inspect the fan blades or louvers for deformation and damage during transportation.
When selecting the air outlet environment for installation, it should be noted that there should be no too large obstacles within 2.5 to 3M opposite the air outlet.
When installing the negative pressure fan, pay attention to the horizontal position of the fan, and adjust it to be level and stable with the foundation plane. The motor must not tilt after installation; When installing the negative pressure fan, the adjusting bolts of the motor should be placed in a position that is convenient for operation. To facilitate the adjustment of belt tightness during use.
When installing the negative pressure fan bracket, make sure that the bracket is level and stable with the foundation plane. If necessary, install angle iron beside the negative pressure fan for reinforcement.
After the installation of the negative pressure fan, it is necessary to check the sealing around it. If there are gaps, they can be sealed with a solar panel or glass adhesive.
After installation, check whether there are any tools and debris left inside the negative pressure fan. Use your hand or lever to move the fan blades to check whether they are too tight or rubbing, and whether there are any objects that hinder rotation without abnormalities. Only then can you carry out a test run; If the negative pressure fan vibrates or the motor makes an abnormal sound of "buzzing" or other abnormal phenomena occur during operation, it should be stopped for inspection and restarted for use after repair.
The negative pressure fan discharges air outward, causing the indoor air pressure to decrease, thinning the indoor air, forming a negative pressure zone, and the air flows into the room due to the compensation for the pressure difference. In practical applications in industrial plants, negative pressure fans are installed centrally on one side of the plant, with air inlets located on the other side of the plant. Air flows from the air inlets to the negative pressure fans to form convective blowing. During this process, the doors and windows close to the negative pressure fan remain closed, forcing air to flow into the workshop through the compensation of the doors and windows on the air inlet side. The air flows into the workshop from the air inlet in an orderly manner, flows through the workshop, and is discharged from the workshop by a negative pressure fan. Ventilation is thorough and efficient, with a ventilation rate of up to 99%. Through specific engineering design and design of air exchange speed and wind speed as required, any high heat, harmful gases, dust and smoke can be quickly discharged from the workshop, and any poor ventilation problems can be thoroughly resolved at one time. Ventilation can be achieved within a few seconds of starting the fan.
Heat sources such as buildings, machinery, and equipment can be directly exposed to sunlight and absorb heat, resulting in temperatures that are higher than the average outdoor temperature. Negative pressure fans come into play at this time, which can quickly discharge heat, achieving a balance between indoor and outdoor temperatures, and the human body feels very comfortable, just like feeling the cool natural wind in an outdoor place.