How to match the negative pressure fan, and how to install the negative pressure fan with the best e

Performance characteristics of high-pressure fan: 1Super quiet, no noise :

The motor runs directly, and the noise of the high-pressure fan is improved by adding an integrated sound pin device, so as to achieve the effect of silence. 2.High reliability: The machine can still operate safely even when the usage changes.

Apart from the impeller, the high-pressure blower has no action and is therefore virtually maintenance-free. The use of a unique, well-dissipated precision outboard bearing gives it the following advantages: high compression ratio; The bearing has a low operating temperature; Long service life of lubricating grease; Maintenance-free.

3.Easy to install Fully equipped, ready to be installed and used for compressed air or vacuuming, or in any horizontal or vertical orientation. 4.

No oil and no pollution When the impeller rotates, it does not contact with any part of the parts, and is lubrication-free

It depends on how large your usable area is, plus the number of air exchanges, and you can know it by calculating it.

There is a formula to calculate, the number of fans is equal to the volume of the plant x80 (the minimum number of air changes) divided by the air volume of the fan, you can see for yourself!!

Precautions for the installation and use of negative pressure fans:

1. It is best to install the negative pressure fan in the middle of the building, near the location where the high temperature and stuffiness and smoke odor are concentrated; If possible, it should be installed in the upper direction of the dominant wind in the cooling environment as much as possible; It can be installed on indoor walls, windows, roofs, and indoor load-bearing pillars, but it should be noted that the installation environment should ensure that the air is smooth and fresh, especially should not be installed at the exhaust port with odor or odor gas. If there are not enough doors or windows, a special air supply system needs to be installed, and the air volume of the air supply system should be more than 100-150% of the total exhaust volume of the negative pressure fan.

2. The installation of negative pressure fans should be paid attention to stability, and the installation of fans should be ensured to be stable, and the direction, position and inclination angle should not be greater than 30 degrees.

3. The quality of the negative pressure fan is the key, generally confirm the host first, in place at one time, such as: Detong, Jiafeng, etc., to increase the service life and effect, and reduce the failure rate.

4. The installation bracket of the negative pressure fan should be made of angle iron of the national standard 4*4 or above, and it must be applied with anti-rust paint to do anti-rust treatment, and the bearing weight of the installation bracket can support the weight of the entire negative pressure fan and the body weight of the two maintenance personnel, and each corner of the negative pressure fan needs to be fixed and stable to avoid the vibration and resonance noise of the negative pressure fan when working.

5. After the negative pressure fan is installed and fixed, it is necessary to pay attention to the sealing of the negative pressure fan and the surrounding gaps to prevent rainwater from leaking into the room on rainy days.

6. The negative pressure fan must be energized to operate, please use a professional electrician for power distribution, the control switch must have the functions of defect protection, leakage protection, current overload protection, etc., the wires and cables used should be able to withstand the load of the motor current, all wire joints are insulated with electrical tape, and the line is buried in the trunking conduit of all specifications.

When installing a negative pressure fan, the wall on this side of the fan must be sealed. In particular, there should be no gaps around the fan perimeter.

The most ideal way to install a negative pressure fan is to close the wall on this side of the fan and the nearby doors and windows, and open the doors and windows on the wall opposite the fan to ensure that the air flow is in a straight line.

The installation of negative pressure fan is a very important project, which has a great impact on the future use effect of negative pressure fan, and must be paid attention to at all times in the whole process of installation.

One of the most important things to pay attention to is to ensure that the quality of the installed fan is good, not cheap, and it should be installed well, such as: Detong, Jiafeng negative pressure fan, etc. It ensures future life, maintenance, failure, effect, etc.

1. Before installation, the negative pressure fan should be carefully checked whether the negative pressure fan is intact and undamaged, whether the fasteners and bolts are loose or falling off, and whether the impeller has a collision hood. Carefully inspect the fan blades or louvers for deformation and damage during transportation.

2. When installing and selecting the environment of the air outlet, it should be noted that there should not be too many obstacles within -3m opposite the air outlet.

2, 1, stable installation: the negative pressure fan should pay attention to the horizontal position of the fan when installing, and adjust to the level of the negative pressure fan and the foundation plane to be stable. After installation, the motor should not be tilted.

2. When installing the negative pressure fan, the adjusting bolt of the motor should be in a convenient position for operation. to adjust the belt tension for easy use.

3. When installing the negative pressure fan bracket, it is necessary to make the bracket and the foundation plane horizontal and stable, and install an angle iron next to the negative pressure fan for reinforcing if necessary.

4. After the installation of the negative pressure fan, the sealing around it should be checked. If there is a gap, it can be sealed with a sunlight plate or glass glue.

1. After the installation is completed, check whether there are any tools and sundries left inside the negative pressure fan. Use your hand or lever to move the fan blade to check whether it is too tight or rubbing, and whether there is any abnormal phenomenon of the items that hinder the rotation before the test operation.

2. If there is a negative pressure fan vibration or abnormal sound of the motor "humming" or other abnormal phenomena during operation, it should be stopped for inspection, and then turned on after repair.

First of all, unpack and check whether the negative pressure fan is deformed or damaged during transportation, if this is the case, it should be overhauled and corrected before it can be officially installed and used. 1；Open the junction box, turn on the power supply (no load), the impeller rotation direction is the same as the nameplate arrow, the negative pressure fan shell needs to be grounded, and observe whether it touches the shell, if this is the case, it should be adjusted immediately.

2；The wiring flange of the negative pressure fan should be connected to the canvas or other soft pipes to facilitate the vibration isolation of the FRP fan and the pipeline, the FRP fan should not bear the weight of the external air duct, and the roof-type FRP fan should be added to the foundation connection and the split hood connection should be added with a damping pad, and the sealant should be filled to avoid air leakage.

3；The negative pressure fan is installed in place, and all fasteners must be retightened once. 4；After removing the inlet and outlet pipes of the negative pressure fan and all nearby obstacles, it can be officially put into use.

1.Preparation for the installation of negative pressure fan: prepare the hand drill, impact drill, electric welding machine, hand grinder, wrench, screwdriver, vice and other tools required in the process of installing the negative pressure fan, as well as negative pressure fan, angle iron, sunlight plate, glass glue, screws and other materials, determine the executive personnel involved in the construction and installation, must prepare more than two healthy adult men, one of whom must have professional electrician qualifications and be proficient in the use of power tools.

2.Make negative pressure fan mounting bracket: Use angle iron to make the negative pressure fan load-bearing mounting bracket on site, make a triangular bracket similar to the air conditioning installation bracket, and drill holes for the mounting bracket and brush anti-rust paint for anti-rust treatment.

3.Fixed negative pressure fan: After fixing the finished mounting bracket on the solid wall at the bottom of the position of the negative pressure fan to be installed, more than two people will lift the negative pressure fan to the mounting bracket, and fix and lock the bracket and the bottom of the negative pressure fan with self-tapping screws, and the surrounding area of the negative pressure fan is 4

Workshop rainwater leakage sealing: After the installation and fixation of the negative pressure fan, it is necessary to seal the gap next to the negative pressure fan to prevent rainwater leakage.

4.Negative pressure fan power distribution test machine: professional electricians distribute power to negative pressure fans, install control switches, connect the main power supply line joints with electrical tape for insulation treatment, bury all power lines into the conduit or trunking, and test whether the circuit is normal with a multimeter.

If the shutter of the fan can be opened normally to exhaust the air, all the installation work of the negative pressure fan will be completed, if the shutter can not be opened, the motor is reversed, it is necessary to disconnect the circuit and carry out any two-phase exchange for the incoming call.

Negative pressure fan, many people may not understand, in fact, is the latest type of ventilator, belongs to the axial fan, used more in the project. However, the installation of negative pressure fan is a very complex operation, and the installation steps will directly affect the future use effect, and many people do not know how to install.

1. Negative pressure fan installation method - preparation:

Prepare the hand drills, wrenches, impact drills, hand grinders, screwdrivers, welding machines, vises and other tools needed in the process of installing negative pressure fans, as well as negative pressure fans, glass glue, sunlight plates, angle irons, screws and other materials, and determine the implementation personnel involved in the construction and installation.

2. Negative pressure fan installation method - make negative pressure fan mounting bracket:

The mounting bracket is made of angle iron, made into a triangular bracket similar to the air conditioner mounting bracket, and the mounting bracket is drilled and brushed with anti-rust paint for anti-rust treatment.

3. Negative pressure fan installation method - fixed negative pressure fan:

Fix the mounting bracket on the solid wall at the bottom of the position where the negative pressure fan is to be installed, then lift the negative pressure fan to the mounting bracket, lock the bottom of the negative pressure fan and the bracket with self-tapping screws, and fix the surrounding corner iron of the negative pressure fan one by one, pay attention to the bracket must be able to withstand the force of about 100 kg, and there will be no loosening, shaking or falling off.

4. Installation method of negative pressure fan - rainwater leakage seal in the workshop

Seal the gap next to the negative pressure fan to prevent rainwater leakage, apply glass glue to the small gap, and fill the large gap with a sunlight plate first, and then seal the small gap with glass glue.

5. Negative pressure fan installation method - negative pressure fan power distribution test machine:

Professional electricians distribute power to the negative pressure fan, install control switches, connect the main power supply line connectors, and use electrical tape to insulate them, bury all the power cords into the trunking or line pipe, and then use a multimeter to test whether the circuit is normal. After everything is normal, you can test it for use.

1.Preparation for the installation of negative pressure fan: prepare hand drills, percussion drills, electric welding machines, hand-held grinders, wrenches, screwdrivers, vices and other tools.

As well as negative pressure fans, angle irons, sunlight plates, glass glue, screws and other materials. When installing, it is required to install a negative pressure fan and determine the executor involved in the construction and installation. Bisun Xiao must prepare at least two healthy adult males, one of whom must be qualified as a professional electrician and be proficient in the use of power tools.

2.Make the installation bracket of the negative pressure fan: make the mounting bracket of the load-bearing negative pressure fan on the spot with an angle iron, make a triangular bracket similar to the air conditioning mounting bracket, drill holes for the mounting bracket, and brush the anti-rust paint for anti-rust treatment.

3.Fixed negative pressure fan: After fixing the prepared mounting bracket on the solid wall at the bottom of the negative pressure fan installation position, two or more people will lift the negative pressure fan to the mounting bracket, and use self-tapping screws to fix and lock the bracket with the bottom of the negative pressure fan, and the negative pressure fan will be surrounded by negative pressure fans.

4.Workshop rainwater leakage sealing: After the negative pressure fan is installed and fixed, the gap next to the negative pressure fan needs to be sealed to prevent rainwater leakage, and small gaps can be coated with glass glue; If the gap is large, it should be fixed with a sun plate first.

4.Negative pressure fan distribution testing machine: professional electricians distribute power to negative pressure fans, install control switches, and insulate the connection of the main power cord with electrical tape.

The power cord is all buried in the conduit or slot, and the multimeter is used to test whether the circuit is normal. After the above work is completed, the negative pressure fan can be energized and debugged. If the shutters of the fan can be opened and exhausted normally, all the installation work of the negative pressure fan is completed.

If the shutter cannot be opened and the motor is reversed, the circuit must be disconnected and any two-phase incoming call should be exchanged.

Changing an ordinary fan to a negative pressure fan requires the following steps:

1.Replace the fan impeller: The impeller of ordinary fans is generally axial impeller, and Shanzhou Gas is not suitable for negative pressure fans. It needs to be replaced with a centrifugal impeller suitable for a negative pressure fan. The centrifugal impeller can generate negative pressure, thereby generating suction power to achieve the effect of a negative pressure fan.

2.Replace the air inlet and outlet: Ordinary fans generally do not have special air inlets and outlets, and need to be replaced with negative pressure fans with special air inlets and outlets. According to the actual use needs, select the type of air inlet and outlet that meets the requirements.

3.Adjust the fan rotation speed: the negative pressure fan needs to meet a certain negative pressure value, if the fan speed is not enough, the negative pressure effect cannot be achieved. The speed of the fan needs to be adjusted appropriately to meet the requirements of the negative pressure value.

4.Check the air duct system: After replacing the impeller, air inlet and outlet outlets, and adjusting the speed, it is also necessary to check whether the air duct system has problems such as blockage or air leakage, which will affect the effect of the negative pressure fan.

The whole transformation process needs to be carried out by professionals to ensure that the transformed negative pressure fan meets the requirements of Anjitu, can operate normally and produce a negative pressure effect that meets the requirements of use.

In layman's terms: this kind of fan is to exhaust the indoor air, which causes the indoor air to decrease and form low pressure (also called negative pressure), so it is called a negative pressure fan.

Function: It is mainly to quickly discharge indoor heat, stuffiness, harmful gases, dust, etc. out of the outdoors, promote air circulation, and also achieve the effect of ventilation and cooling.

In terms of production areas: mainly divided into Guangdong production areas (better quality, more brands), as well as Shandong, Zhejiang production areas (poor quality, cheap).