Negative pressure fans believe that everyone has heard of it, it is the main cooling equipment in many factories, workshops, farms and other places. How to identify the performance of the negative pressure fan? And the mechanical equipment will inevitably produce a certain noise during the use of the process, how to solve the noise of the negative pressure fan? Today we will look at it together.

How to identify the performance of negative pressure fans?

1. To ensure dynamic balance. As we all know, dynamic balance is the basis for ensuring the effective operation of negative pressure fans. The negative pressure fan with good quality and excellent quality has low vibration and low noise during operation, which can greatly improve the working efficiency of the negative pressure fan.

2. In the treatment of noise, the enterprise can judge the noise by changing the sound during the working process of the negative pressure fan.

3. When observing the air volume of the negative pressure fan, it can be judged by observing the condition of the blade of the front louver during operation and the wind pressure when the negative pressure fan is working.

4. Determine whether the negative pressure fan meets the technical requirements by measuring the current.

How to solve the noise of the negative pressure fan?

1. When the negative pressure fan is installed, the contact with the window frame is too tight, so that the window frame resonance occurs when the negative pressure fan is running.

Solution: Reduce the packing between the window frame and the water air conditioner properly, and use a softer material to fill it. If the bottom of the installation is not stable, the bottom plate should be stabilized and placed securely and securely.

2. The negative pressure fan is not properly installed. The installation of the negative pressure fan should be in a suspended state. The spring of the foot bolt cannot be crushed.

Solution: Ask the maintenance personnel to adjust the installation status of the negative pressure fan to make it in suspension.

3. The anti-vibration pad or fixing screw of the negative pressure fan base is screwed too tightly, and the vibration-absorbing effect is lost.

Solution: Adjust the screw tightness of the damping pad of the negative pressure fan base to make the base surface smooth.

4. The power supply voltage is too low. When the negative pressure fan starts or runs, abnormal noise and vibration are generated.

Solution: Control the power supply voltage within the rated voltage range. A voltage regulator or power regulator can usually be used to stabilize the voltage.

5. The negative pressure fan blades collide with the fan casing (cover).

Solution: Reasons for adjusting the blade: The fan motor of the negative pressure fan is poorly driven, the screw of the axial fan is loose, the blade is not fixed on the shaft, and the gap between the top of the blade and the hood is too small. Solution: Replace the negative pressure fan motor bearing to tighten the screws on the axial fan base and the shaft. According to the production technical requirements, the distance between the tip of the blade and the casing is generally not more than 1.5% of the length of the blade.

6. The base screw of the negative pressure fan is loose, the impeller is poorly assembled, the rotation speed is too fast, the fixed screws on the shaft are loose, etc.

Solution: Fasten the fan base of the negative pressure fan and the screws on the shaft. Reassemble and adjust the impeller clearance according to technical requirements

The above is the identification method of the performance of the negative pressure fan and the solution of the noise, I hope to be helpful to everyone.

The negative pressure fan is a device that utilizes the principle of natural air convection and combines its unique structural design to accelerate and transform any air in parallel direction into a vertical flow of air from bottom to top to improve the ventilation effect of the indoor ventilation. It does not require electricity, no noise, can operate for a long time, and discharges hot air, smoke, odor, water vapor, etc. in the room. The specific advantages are as follows:

   

    1. Free of electricity, use the temperature difference and natural wind to make the negative pressure fan rotate. It can easily drive the turbine blades to rotate continuously for 365 days in a row without the breeze or the indoor and outdoor temperature difference. No electricity is needed at all. High sensitivity and saving a large amount of running cost;

    2, the negative pressure fan has a long service life, at least for more than ten years, and benefits for more than ten years;

   3, easy to install, negative pressure fan without motor, no power consumption, no noise, small size, light weight, high exhaust efficiency, easy to install. Save you a lot of labor and materials:

    4, maintenance-free maintenance-free, the negative pressure fan uses a complete set of fully sealed high-grade bearings, no lubrication, sturdy and durable.

    5, high efficiency, negative pressure fan requires only a small amount of wind, it is very effective to improve the working environment of the factory and improve work efficiency. It can bring you fresh air convection, remove hot air, exhaust gas or smelly air.

    6, wide-ranging, negative pressure fan is widely used in agriculture, animal husbandry, industry, public places and other industries, making important contributions to improving the environment.

One of the important website products and key keywords of chillers should be treated seriously in their learning attitudes. In terms of learning requirements, it is necessary to achieve this level so that they can be used correctly and reasonably. Cooling fans, and at the same time, to get good results. Therefore, based on this, the next step will be to explain the knowledge in this area so that everyone can master and apply it in time.

1. The chiller in the cold storage, if it is frosted, is it necessary to carry out defrosting work?

If the chiller in the cold storage has frost formation, then it is necessary to perform defrosting work. Otherwise, the chiller cannot work normally. Moreover, in the defrosting method, it can be either a manual defrosting or a mechanical defrosting. As for which one to use, it depends on the actual situation, and it is determined by it.

2. Air coolers, how can they be classified in a big way?

In terms of the large aspect, the air cooler can be divided into two types: a domestic air cooler and an industrial air cooler. If it is a domestic air cooler, it is mainly used to reduce the indoor temperature in summer, and industrial cooling fans, which are generally used in refrigeration equipment, are an important part of the refrigeration equipment. For example, it can be used as a cold storage machine. .

3. The over-flow protection of the air cooler, how should it be handled?

The over-current protection of the air cooler is a protection mechanism of the air cooler, indicating that the current in the equipment exceeds the specified limit, and the equipment has a fault problem. At this time, the operation of the air cooler should be stopped immediately. Check the work to identify the problem and resolve it in time to avoid adverse effects or consequences.

All of the above problems are related to the air cooler, and at the same time, it is also related to the website products. Therefore, I hope that everyone can take it seriously and carry it out so that it can be mastered in time. In this way, it can be applied to the actual work, and at the same time, to improve the use of the product, so that you can benefit from it.

The energy saving of the air cooler system is mainly achieved through the following three aspects: the conversion efficiency of the equipment itself, the scientific design scheme, and the normative construction.

The conversion efficiency of the device itself is higher

Compressor: The compressor uses electric energy as a “porter”. The refrigerant is used as a medium to extract the energy in the air and convert it into cold/heat in the room.

The better the performance of the compressor, the higher the energy conversion efficiency, which means that the less the amount of electricity, the more cold the “handling”. When the amount of cooling required in the room is certain, the better the compressor performance, the less power consumption!

 

The inverter's own variable frequency control technology: The variable frequency control technology of the compressor means that the running speed of the DC inverter compressor motor can be continuously and freely adjusted according to the system capacity change. The adjustable range and higher precision mean lower power consumption. .

For example, the external fan of the chiller is full, and it takes three copies of electricity to convert six pieces of cooling capacity to six rooms. When it is only necessary to provide two cold rooms in two rooms, the compressor's frequency conversion technology can control the speed of the motor operation, and realize one electric power to provide two room cooling, instead of continuing to spend three times to provide two cold the amount.

The more scientific the design

Don't underestimate the design of the chiller. It is very simple to look at the designed system, but it involves many design points and design techniques. The more scientific design, the more efficient the operation, the more energy efficient!

In the design, we must first design the pipeline direction, equipment location, air supply mode, return air mode, and inspection port position in combination with the actual apartment structure and decoration scheme. These are affecting the appearance, noise, and effect. For example, the design does not take into account the uniformity of the airflow. It just looks at the location where it is placed, or just guesses it, rather than careful airflow analysis. It is easy to cause the feeling of not being cool when using, or the unevenness of the cold. At this time, in order to cool enough to reduce the air outlet temperature of the air conditioner, the operating speed of the air conditioner compressor motor is increased, and finally, the electricity fee is increased to obtain sufficient cooling capacity. This is one of the power consumption factors.

In addition to these, the design also selects different devices in combination with the type of room type, and configures according to the ratio of the ratio specified by the manufacturer.

The more standardized the construction

Many people have a misunderstanding. They choose products that are very expensive and have a good reputation, but they ignore the quality of construction.

In fact, the standardization of the construction of the chiller is the premise guarantee for the energy-saving operation of the chiller! For a simple example, a person who does not understand the computer assembly has a good computer component. You think this person uses these computers. Will the computer assembled with the components be the best performing computer? The Maxima should also have Bole to be able to make a thousand miles. The same reason, no matter how good the equipment, it is no good to run into a second-class engineering installation team.