How to choose a powerful and easy-to-use electric fan
4hw.com.cn: when summer comes, many friends start to buy electric fans. Now there are many kinds of electric fans, including those with traditional fan blades, those without fan blades, those with floor fans and air-conditioning fans. There are a variety of ways to buy electric fans? Let's have a look.
Classification of electric fans:
1. Rotary fan
The electric motor of the rotary fan is small and hardly protrudes when connected with the fan blade. The whole fan is only slightly larger than the fan blade. The wind direction is adjusted by the rotation of the mesh cover in front of the fan blade, which is easy to move. However, due to the small motor, the air volume is also small.
2. Floor fan
The floor fan is the most common electric fan. The bottom is fixed by the base, the supporting rod is raised, and then connected with the motor and the fan blade. This kind of electric fan has enough wind power, which is suitable for large rooms with large turning angle, and takes care of as many spaces as possible. The disadvantage is that the gap between the mesh covers is large and it is easy to hurt children.
3. Tower fan
The tower fan rotates through the internal wind wheel to release the wind through the optical flow fan to form the air flow, which is similar to the principle of the internal air conditioner. It has the advantages of small footprint, fashionable appearance, but general air volume, suitable for small house type use. The noise is a little loud. It's not easy to clean the dust. Because most of the tower fans are not very high, and the up and down angles cannot be adjusted, the wind direction is relatively low, and the legs are often blown.
4. Air conditioning fan
Air conditioning fan is also called cold fan. In fact, it has nothing to do with air conditioning. There is no compressor for refrigeration. The air-conditioning fan draws in air through the motor and is discharged after cooling. Usually, water or ice crystals are used for cooling. The discharged air is a few degrees lower than the ordinary fan, but it has no effect on the temperature inside the house. Therefore, only when the air-conditioning fan blows directly on the body can it feel cooler than the ordinary fan. However, due to the use of water for cooling, the humidity of the air-conditioning fan is large and it is very easy to get it for a long time Rheumatism, if it is humid climate in the south, will blow more and more humid. So there are two words to describe the air-conditioning fan: 'if you hate him, give him the air-conditioning fan'; 'the air-conditioner can be bought, the electric fan can also be bought, but the air-conditioner and the electric fan can't be bought together'. What's more, there were people who wanted to use air-conditioning fans as cheap humidifiers.
5. Leafless fan
The leafless fan was originally invented by Dyson (Dyson), named for its lack of blades. In fact, there is a turbine fan at the bottom to take in air and send it into the hollow ring, through the gap set in the ring to supply air. The ring section of the air multiplier adopts the shape similar to the wing of the aircraft, and uses the Coanda effect and the same effect as the lift of the wing to improve the air volume. Due to patent problems, at present, only domestic Shanzhai factories are doing this except for Dyson. Most of the Shanzhai factories are poor in quality and loud in noise. If the air flow school wants to experience the leafless fan better, it is recommended to choose Dyson genuine, but the price is more expensive than the low-end air conditioner, around 2000 yuan.
Key points of fan selection:
1. Number of leaves
Considering the characteristics of rotating balance, the number of blades of general electric fan is odd, even blades are easy to produce resonance when rotating, resulting in damage. Originally, the electric fans are basically three leaves. In recent years, there have been many five leaf fans. This is because the more the number of fan leaves, the more even and soft the wind is cut. But the more the leaves, the greater the motor load, so the number of fan leaves can not be too much.
2. Fan motor type
At present, most of the motors use aluminum shell, and the inner coil uses copper wire. The aluminum shell mainly has high heat dissipation efficiency. Some old fans use iron shell, but the iron is heavier than aluminum, and the heat dissipation efficiency is not as good as aluminum.
Nowadays, many brands of electric fans are advocating their own electric motors and giving them some names, such as:
Xianfeng aluminum core motor, according to the characteristics of aluminum, is impossible to become the coil material inside the motor. Moreover, the propaganda materials of Xianfeng's own are often mixed with aluminum core and aluminum shell, which belongs to the propaganda slogan of confusing concepts, and is no different from ordinary motors.
Midea md-sqd motor, in fact, SQD represents safe, quiet and durable, which is not a technical name. It is not very different from traditional motor.
Gree 4S high efficiency motor is similar to SQD motor. 4S represents smoothrunning, soundless, safe and saveenergy, which are also not technical names.
Although there is no obvious technical difference between the motors of different brands, the motors of big brands are bound to be more secure. As long as the materials and workmanship are reliable, no advanced technology is needed to last for 10 years.
3. Pumawek oil
Pmawick lubricating oil is a fiber solid lubricating oil developed by permawick company of the United States. Its advantages are: high oil content, good oil retention, control of oil release rate of lubricating oil, wide range of temperature resistance, so as to extend the service life of the motor. At present, big brands such as Midea, Gree, Emmett, pioneer, Watson, etc. all have fans that use pmawick lubricating oil, and the lubricating oil only plays an auxiliary role after all, so it doesn't need to be too concerned.
4. Details to be paid attention to in purchase and use
When purchasing electric fans in the store, pay more attention to the heating problem of the motor. The hotter the motor, the greater the internal loss, or the poor cooling capacity. Attention should also be paid to whether the minimum wind stop is small enough and whether the noise is acceptable. Whether it has remote control function, the remote control can control the electric fan very conveniently. It is better to choose the model with remote control for home use.
In use, pay attention not to block the back of the fan, the fan needs to inhale air to produce air flow. The warranty of electric fans is one year, and there are often problems when they are taken out for use in the second year, so it's better to try to check whether all functions are normal before the end of the warranty period.