Air Cooler Motor Manufacturers

How much do you know about air cooler motors? ​

I. What is an air cooler motor? ​

A air cooler motor is an electric device that drives the air cooler fan and can convert electrical energy into mechanical energy. Depending on the type of air cooler, the motor can be divided into AC motors and DC motors. Usually, the motor is placed at the back of the air cooler. It converts electrical energy into mechanical energy to drive the fan blades to rotate, thereby achieving air circulation. For example, in a common household air cooler, the motor is like a "heart", providing a continuous source of power for the fan, promoting indoor air flow, and achieving a cooling effect. ​

II. What is the working principle of the air cooler motor? ​

Working principle of AC motor:
The AC motor is the most commonly used type of motor in the air cooler. Its working principle is to generate a rotating magnetic field in the stator, which in turn induces current in the rotor. The rotor is connected to the fan blades. When the rotor rotates, it can drive the fan blades to rotate and promote air circulation. Just like a table fan at home, the AC motor inside it makes the fan blades rotate at high speed in this way, producing gusts of cool air. ​

How DC motors work:
DC motors are relatively rarely used in air coolers, but they still exist in some models. It creates an electric field by applying voltage to the motor, which interacts with the magnetic field generated by the stator to rotate the rotor, thereby driving the fan blades. For example, some small portable air coolers may use DC motors and use batteries to power them for flexible cooling functions. ​

III. What are the types of air cooler motors? ​

Shaded pole motors:
Shaded pole motors are the most basic type of motors in air coolers. It has a simple design with only a single coil and a shaded pole on one side of the coil. The shaded pole can produce a phase shift in the magnetic field to cause the rotor to rotate. However, this type of motor is not very efficient and often makes a lot of noise when running. Shaded pole motors may be used in some early simple air coolers, but their disadvantages also limit their widespread use in modern air coolers.​

Permanent Split Capacitor Motor (PSC Motor):
PSC motor is a highly efficient and quiet motor. Its auxiliary winding is connected to a capacitor, which provides additional phase shift to the magnetic field, making the rotor rotate more smoothly and reducing noise accordingly. Today, many mid-to-high-end air coolers use PSC motors to improve the user experience and reduce noise interference while ensuring the cooling effect. ​

Brushless DC Motor:
Brushless DC motor is the most advanced type of motor in air coolers. It has a more complex design and an electronic circuit to control the rotation of the motor. This motor has significant advantages such as high efficiency, quietness and long service life. In some air cooler products with extremely high performance and quality requirements, brushless DC motors are often seen. Although their cost is relatively high, they are favored by some consumers due to their excellent performance. ​

IV. What are the key technical parameters of air cooler motors? ​

Power:
Power is one of the important parameters of air cooler motors, which directly affects the air output and cooling effect of the air cooler. Generally speaking, the greater the power, the stronger the driving force of the motor, the higher the fan speed, the greater the air output, and the faster the cooling speed. The power of household air cooler motors is usually between 30-100W, while the power of industrial air cooler motors may reach hundreds of watts or even higher. For example, in a workshop with a large area, a high-power air cooler motor is required to meet the cooling needs. ​

Speed:
The speed refers to the number of times the motor rotates per minute, in revolutions per minute. The speed is closely related to the air output. Under the same other conditions, the higher the speed, the faster the fan blades push the air and the greater the air output. The speeds of different types of air cooler motors are different. The speed of shaded pole motors is relatively fixed, generally between 1000-2000 revolutions per minute; while the speed of brushless DC motors is adjustable in a wide range, which can be adjusted within a certain range according to actual needs, and can better adapt to different cooling scenarios. ​

Efficiency:
Efficiency is an indicator of the energy conversion ability of the motor, that is, the ratio of the mechanical energy output of the motor to the electrical energy input. The more efficient the motor is, the less power it consumes at the same power, and the more energy-saving it is. For example, the efficiency of a high-efficiency brushless DC motor can reach more than 80%, while some old shaded-pole motors may only be about 50% efficient. In the long-term use, high-efficiency motors can save users a lot of electricity bills. ​

Noise value​:
The noise value refers to the sound level produced when the motor is running, in decibels (dB). The lower the noise value, the better the user experience. Brushless DC motors and PSC motors perform well in noise control, and the noise during operation is usually between 40-60 decibels; while shaded-pole motors have relatively large noise due to their own structure, which may exceed 60 decibels. In places that are sensitive to noise, such as bedrooms and offices, air cooler motors with low noise values ​​should be preferred. ​

V. What are the common problems of air cooler motors? ​

Motor overheating:
Overheating is one of the common problems of air cooler motors, especially in hot weather conditions. There are many factors that cause motor overheating, such as clogged air filters, which make air circulation difficult, and the motor needs to consume more energy to operate, thus generating too much heat; dusty fan blades become dirty, which affects the rotation efficiency of the fan and also increases the motor load; in addition, capacitor failure may also cause motor overheating. Motor overheating not only damages the motor itself, but also greatly shortens its service life. For example, during the hot summer period, if the air cooler is running for a long time without cleaning and maintenance, the motor is prone to overheating. ​

High operating noise:
It is also a common problem that the air cooler motor generates excessive noise during operation. This may be caused by a variety of reasons, such as loose parts of the motor, which will cause shaking and collision during operation, making noise; bearings wear out after long-term use, and no longer rotate smoothly, which will also produce abnormal sounds; if the fan blades are unbalanced, they will cause violent vibrations when rotating at high speed, and then generate loud noise. These noises will have a serious impact on the user experience. For example, when using an air cooler in the bedroom, if the motor noise is too loud, it will interfere with rest and sleep.
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Capacitor failure: The capacitor is one of the key components of the motor, which provides the necessary electrical energy to drive the fan blades. Once the capacitor fails, it may cause the motor to not work properly or significantly reduce the performance of the motor. For example, when the capacitor capacity is insufficient, it may become difficult to start the motor and the speed is unstable; if the capacitor is completely damaged, the motor may not even start. ​

VI. How to maintain the air cooler motor? ​

Regular cleaning: Regularly cleaning the air cooler and its motor can effectively prevent the occurrence of blockage problems. During the cleaning process, carefully remove dust and debris accumulated on the fan blades or motor. Because the accumulation of these dirt may hinder air circulation, increase the burden on the motor, and cause the motor to overheat. It is recommended to perform a comprehensive cleaning of the air cooler every once in a while (such as one month), wipe the surface of the motor with a clean soft cloth, and use a brush to clean the dust on the fan blades to ensure that the motor can run smoothly. ​

Do a good job of lubrication: Lubricating the motor bearings can significantly reduce friction and prevent bearing damage due to excessive wear. When choosing lubricants, choose high-quality products and add the right amount of lubricant to the bearings at specified intervals (e.g. every six months). This will not only extend the life of the motor, but also ensure that the motor runs more smoothly and with less noise. ​

Check the capacitors:
Regularly check the capacitors for signs of damage or failure. You can observe the appearance of the capacitors to see if there are abnormalities such as bulges or leakage; you can also use professional tools to check whether its capacitance is within the normal range. Once a problem is found in the capacitor, replace it with a new one immediately to avoid further damage to the motor. For example, check the capacitors once a year before the start of the air cooler season to ensure that they are in good condition.