Electric fans are the main heatstroke prevention and cooling equipment for many people in summer. However, some people use electric fans improperly, which brings harm to health, such as cold, facial paralysis, scapulohumeral periarthritis, backache and so on.
Blow for a long time
Many people like to blow electric fans for a long time. They will stop when they feel cold, and they will feel hot. Might as well blow them for a long time. However, if you blow on the electric fan for a long time, the temperature of the human body will drop with the evaporation of a lot of sweat, which may easily cause diseases such as colds, colds, abdominal pain and diarrhea. Generally, it is appropriate to blow for half an hour to 1 hour at a time.
High speed blowing
In order to cool down as soon as possible, some people turn on the electric fan to the highest speed, thinking that a strong wind is enough to reduce the fever. This is an inappropriate practice. When the temperature exceeds 30℃, the air temperature is close to the normal body temperature, and the wind from the electric fan is also high temperature wind. At this time, the body's heat mainly depends on the evaporation of sweat. If the electric fan blows too much, the skin surface temperature drops, the pores are blocked, and the sweat inside the body can't be emitted, you will feel hot, and fatigue, backache and backache will occur at the same time. This is the so-called "sweat suppression". Therefore, it is not suitable to use electric fans for high-grade high-speed blowing, and it should be adjusted to medium or low speed, and it is better to blow breeze.
Blow near wind
Don't put the electric fan near your body. If a strong wind blows nearby and only blows on one side of the body, the skin sweat on the windy side will evaporate rapidly and the temperature will drop obviously, while the sweat on the windless side will evaporate slowly, resulting in a large gap between blood circulation and sweat excretion on both sides of the body, and the nerve center will lose balance. Once the time is too long, all organs will be exhausted and feel unwell. Therefore, when blowing an electric fan, it is best to keep a distance of 2 meters from people, so that the wind blown out is even and soft.
Blow directional wind
At present, most electric fans are shaking heads. When blowing, the electric fan constantly moves its position and direction, and the blowing becomes bigger and smaller, so that the wind on the body surface slows down, people will not feel too cold, and the whole body temperature is uniform. Therefore, it is best to use a rocking fan instead of blowing directional wind.
Sleep and blow
That is, use an electric fan to cool down and sleep. When people are asleep, the functions of various organs of the body are reduced to the lowest level, all reflexes disappear, and immunity is reduced, which is easy to cause diseases.
The biggest misunderstanding in the use of electric fans-start the slow gear first
When starting the electric fan, many people are used to starting from the slow gear, thinking that it saves electricity. Actually, it's just the opposite.
When starting in low gear, the voltage of 220 volts is reduced by the governor and added to the motor. The starting current is very large, and the motor is prone to heat, which is not conducive to the service life. Although the design of electric fan has taken into account the need of speed regulation, it is obviously unfavorable to the motor. If you start from the fast gear first, the motor will start with enough force and the temperature rise of the motor will be small. Obviously, it is very beneficial to save electric energy and prolong the service life of motor and governor. Therefore, when starting the electric fan, it is best to use the fast gear first, and then adjust it to the slow gear after the speed is normal.
How to use electric fans correctly in summer
On a hot summer day, it's very pleasant to turn on the electric fan and the breeze blows on your face. But many people get sick because of improper use of electric fans. The reason is that many people lack common sense in using electric fans.
Some people are too eager to be cool, so they put the electric fan close to their bodies and keep blowing for a long time. In this way, the sweat on the side that can blow to the wind evaporates quickly, and the body surface temperature drops obviously. On the unexposed side, sweat evaporates slowly, the skin temperature is relatively high, and the blood vessels on the body surface are still in a relaxed state, which eventually leads to imbalance of blood circulation and uneven sweat excretion, which may cause headaches, dizziness, general discomfort and other symptoms, which are serious. When some people are too hot to sweat, they suddenly blow with an electric fan, which is easy to cause a cold; If you still blow an electric fan when you sleep, it is easy to cause a cold.
First, the wind speed should not be too high: Modern science believes that the indoor wind speed should be controlled at 0.2-0.5 m/s, especially in well-ventilated rooms and places with through flow, and the wind speed of electric fans should not be too high.
Second, it is not appropriate to blow directly at people: direct blowing, wind evil is easy to invade the body, especially when the body is weak or sweating, it is best to let the electric fan blow at a corner;
Third, the electric fan should stop blowing, and it is advisable to use a shaking electric fan. For children, the elderly and the infirm, it is more appropriate to use an electric fan to blow less, because "evil places will be empty", but you can use an electric fan to adjust the indoor airflow to indirectly cool down.
Fourth, pay attention to when sweating a lot, don't blow air immediately while sitting or lying still, because at this time, the blood vessels on the surface of the whole body are dilated and suddenly blown by the cool wind, which often causes the blood vessels to contract and the perspiration stops immediately, thus making the heat generation and heat dissipation in the body out of balance, and the excess heat cannot be discharged from the body;
5. After the cool breeze blows, the local defense function declines, and the invasion of viruses and bacteria can cause upper respiratory tract infection, muscle and joint pain, and some even abdominal pain and diarrhea. In a word, you must pay attention to the method of using electric fans, otherwise good things will turn into bad things, which is not conducive to your health.
Let this summer be low-carbon.
The fan is used with the air conditioner.
Because the fan can directly convert electric energy into kinetic energy, the power consumption is very low, and the highest power is only 60W, which is equivalent to the power consumption of ordinary lighting table lamps. Therefore, from the perspective of energy saving, using fans in midsummer is undoubtedly the best choice. The fan is used with the air conditioner, and the temperature of the air conditioner is set at 26 -28 degrees, which saves electricity and money.
Try to use mid-range or low gear.
As far as the use of the fan itself is concerned, fans with large blades generally have large electric power and consume a lot of electric energy. The power consumption of electric fan is proportional to the rotating speed of blades. For example, a 400 mm electric fan consumes 60W when used in fast gear and only 40W when used in slow gear. The power consumption difference between the fastest gear and the slowest gear of the same electric fan is 40%, and the power consumption of the fast gear 1 hour can be nearly 2% in the slow gear. Usually, the fast gear can be turned on first, and then the slow gear can be used to reduce the power consumption of the electric fan after cooling.
When in use, the fan is best placed next to doors and windows:
This not only facilitates the air circulation, improves the heat dissipation effect, but also shortens the use time and reduces the power consumption.