Negative pressure fans generally do not produce much noise, but noise is inevitable. This is more related to the correct operation method and the quality of the product itself. What should we do when there is noise? Here is our detailed introduction, let's take a look. Ningbo City Air Cooler, Ningbo Air Cooler

1. One of the reasons for the large noise in the operation of the negative pressure fan is the problems that occur during the installation of the device. For example, the fan installation and the window frame are too tightly contacted, so that the fan frame causes resonance of the window frame and noise.

Solution: Reduce the stuffing between the window frame and the water and air conditioner properly, and use a softer material to stuff it. If the installation bottom is not stable, the bottom plate should be stabilized and placed stably and firmly.

Second, the power supply voltage is too low, when the fan starts or runs, it produces abnormal noise and vibration.

Solution: Control the power supply voltage within the rated voltage range. Usually, a voltage regulator or a power regulator can be used to stabilize the voltage.

3. The vibration damping pad or fixing screw of the fan frame is too tight, and the vibration damping effect is lost, and the vibration sound will be generated during work.

Solution: Adjust the screw tightness of the vibration damping pad of the fan frame to make the surface of the frame flat.

Fourth, the fan installation is not good, the fan installation should be in a suspended state, and the spring of the foot bolt cannot be crushed to death.

Solution: Ask the maintenance personnel to adjust the fan installation status so that it is in a suspended state.

In short, if there is a problem with the negative pressure fan, as long as we carefully check, it will naturally check the problem. Of course, you must notify the technicians in time, under the guidance of the technicians, so as not to damage the machinery!

After introducing the negative pressure fan for so long, you must have learned a lot about the negative pressure fan. Today we introduce to you what parts and accessories of negative pressure fan and how to judge whether it is good or bad, I hope to help you!

1. Negative pressure fan parts and accessories

1. Motor

Motor is the heart of negative pressure fan. The belt-type motor is generally an ordinary motor, but the Suji brand FRP negative pressure fan is independently developed and produced for supporting the Suji fan, with built-in automatic protectors for overcurrent, overload, and phase loss; while the direct motor is a negative pressure fan Dedicated 12 pole dustproof and waterproof aluminum shell motor;

2. Fengye

The blades of negative pressure fan are divided into: aluminum alloy, glass steel, aluminum-magnesium alloy die-casting molding, nylon plus iron and other materials. The material of the blade is determined according to the place of use. At present, the glass fiber reinforced plastic fan blades used in the market are more wear-resistant, will not deform, break, scientific radian design, large air volume, low noise and low wind resistance.

Second, how to judge whether the negative pressure fan is good or bad?

1. Looking at the appearance, the general shape with good quality is relatively neat and will not be skewed.

2. Depending on the thickness of the casing, the negative pressure fan generally uses an iron sheet as the casing, and the general materials with good quality are much thicker

3. Look at the quality of the motor, fan blade and other accessories. The motor should be good enough, whether it is all copper wire, and whether the fan blade is not easily deformed.

In fact, laymen are generally more difficult to distinguish, so as long as you remember some of the better, negative pressure fan brands, and specify to buy these brands of machines, you will usually buy good goods.

Many old customers have used the air cooler for a few years and found that the noise of the air cooler is getting louder, the air volume is getting smaller and smaller, and the cooling effect is getting worse. Due to the popularity of the system, many consumers report that the noise generated by the air cooler is too large, which has become a major problem facing the industry for a while. Air cooler manufacturers started to develop silent air coolers, or researched methods to reduce the noise of air coolers.

1. When installing the air cooler, in the choice of location, close contact with other objects should be avoided. Tight installation will cause the air cooler to collide with each other during operation and produce noise. If it cannot be avoided, choose something softer , Fill in the middle.

2. The air cooler has been used for a long time. The clogging of the filter screen and chassis caused by dust and grit will also be one of the reasons for the noise of the air cooler. At this time, it is necessary for our air cooler manufacturers to maintain and clean. Many customers have lost the maintenance and cleaning of the cooler after the installation and handover of our customers. After the air cooler filter is blocked, not only will the noise increase, but the cooling effect will become worse and worse over time. Seriously, it will greatly reduce the service life of environmentally friendly air conditioners. Therefore, we must remind the majority of users of air coolers that they should not forget the maintenance of the machine during use. If you find that the air volume of the cooler becomes smaller or the cooling effect is poor, it is likely that the filter is clogged because the filter is not cleaned.

For the important product of negative pressure fan, the following fan manufacturers mainly explain its specific application, noise problem handling, and other aspects, so that everyone can learn from different angles, so as to deepen their understanding and understanding. Moreover, these are also conducive to the actual operation of the fan.

Negative pressure fans, from a professional point of view, it belongs to the category of ventilators, specifically, it belongs to axial fans. The origin of its name is mainly because this fan realizes ventilation and cooling through negative pressure, so it is called negative pressure fan. Therefore, in the view of fan manufacturers, this kind of fan project essentially includes two aspects of ventilation and cooling.

1. Specific application of negative pressure fan

For the specific application of negative pressure fans, the fan manufacturer Hulin made a summary, which is as follows:

Application 1: For ventilation, it is usually installed outside the workshop window, usually located in the downdraft, so that the odor in the workshop can be extracted and replaced with fresh air. Therefore, this application is mostly in factories.

Application 2: In summer, it is used in conjunction with a wet curtain. In this case, the indoor temperature can be reduced and a certain humidity can be maintained, so that the air is not too dry.

Application 3: Use the negative pressure fan as an exhaust fan, because it will have a good use effect, compared with the exhaust fan. Moreover, the installation position can be determined as required.

What are the solutions to the noise problem of negative pressure fans?

Second, the analysis and solution of the negative pressure fan noise problem

If the negative pressure fan produces noise, what are the reasons and how to solve it? This problem is given by the fan manufacturer Hulin below.

1. During the installation of the negative pressure fan, the tightening degree is too tight, which makes the fan generate noise due to resonance. If you want to solve it, just adjust the tightening degree to make it suitable.

2. The screws on the base of the negative pressure fan are over-tightened, so that they have no vibration-damping effect, resulting in this problem. At this time, we can adjust the tightness of the screws to solve the problem. In addition, it may be that the power supply voltage is too low. As long as it is properly increased, the problem can be solved well, so that the fan can be used smoothly.