Does the 'air conditioner' fan really regulate?

In recent times, there are many types of "air-conditioning fan" in both supermarkets and supermarkets in both models and prices. So what is air conditioning fan and what is its nature?

Prior to the need for cooling in the harsh conditions of the climate, people have found ways to cool or heat themselves. In it perhaps the fire, wind and water are the first used elements.Steam fans make use of two factors, wind and steam, to cool it off , it is now promoted as a "cooling fan" but few know that this cooling principle was born long ago.

Ancient evidence of the use of water for cooling.

According to historical sequels left on ancient Egyptian paintings, humans tried to take advantage of the evaporation of water to cool the body. Of course, at that time the Egyptians only thought of simply fanning a pot of water to . cool it. Then the Romans in turn began to go a little further with the circulating cooling system with water pipes through their walls to maintain cool temperatures. Ordinary Romans also learned how to survive the heat waves by hanging mats that had soaked water in their tent doors or their houses to cool off.

It was not until the 16th century that Leonardo da Vinci officially invented the hygrometer device (hygrometer) and was considered to be the first to make "air" mechanical air cooling rather than using making tools. primitive steam cool like before.

This Da Vinci device consists of a hollow, partially submerged wheel that carries water when operating and providing steam when rotated. The air is cooled by a small amount of water that carries this wheel splashing and evaporating during the wheel operation.

After Leonardo da Vinci came up with the ideas, in the early nineteenth century, textile manufacturers in New England (USA) also began to use evaporators to cool the air in the The factory must experience hot summer. Later residents of the western United States also used similar solutions (as in ancient times) to cool in 1920-1930.

Oak honeycomb or straw used to distribute steam.

One of the steam fan prototypes is on display in Japan.

It was not until 1902 that Willis Haviland Carrier made a breakthrough in heat control when inventing air conditioners , but for simple reasons it was easy to make, easy to use, and especially the cost of cooling fans. Steam still exists in parallel until now. Current improvements still focus primarily on more efficient use of water resources as well as on performance and material and design changes.

Specifically, steam-cooled fans are currently being labeled "air-conditioning fans" by manufacturers and sold in many countries around the world, from the US to Australia and countries in Africa and Asia. . under many different brands and prices.

How does air conditioner work?

According to an article on TheAustralian definition, the "air conditioner" fan will evaporate (evaporative cooling, different from the air conditioning concept) by adding moisture to the outside and rear air. It pumps this high humidity air out (into the space you need), taking advantage of the evaporation to cool the air and the contact surface. Besides, steam fans only work effectively in open spaces or in rooms with large windows and doors to solve the evaporation of water vapor.

"Air-conditioning" fans do not have the ability to actively increase or decrease the temperature like real air conditioning devices.

In theory, hot air can hold higher humidity and vice versa, so this cooling device (conditioner) will only achieve optimum efficiency when the humidity of the outdoor air is below the level. 30% RH (relative humidity). The humidity in the air is actually the amount of steam brought in by the sea breeze or discharged from rivers and trees. The higher the air temperature, the greater the amount of water vapor in the air (except for the desert and the places where little rivers and trees are), the relative humidity of 100% indicates that the air is filled with water vapor, to the saturated state. . That is why the humidity in the North in the hot season is very high and the cold season is very low.

Is Vietnam climate suitable for steam cooling?

Except for some places with temperate climates such as in Sa Pa and Da Lat, or where the climate is continental like Lai Chau and Son La . the rest in Vietnam is a country affected by the tropical so the Very high humidity, especially in the North, is a tropical climate with four seasons, even when the daily humidity is up to 80%, far exceeding the efficiency of steam cooling method. In other words, the use of a steam-cooled fan (also called an air-conditioning fan) in this humid condition will hardly bring any significant benefit to the user , because then the room is no different. into a steam oven, the air with steam will become dense and the user will then feel stiffer, the sweat will not escape.

Need spacious space to utilize the evaporation of water for cooling effect.

In contrast, in the southern region, near the equator and with lower humidity, that is also the reason why women in the South often carry a spray of moisture to cool their face and skin daily. .Although the use of steam fans in the South will be more efficient than the North, it will not achieve optimal performance because the humidity here is also often 40-60%.

Understand the concept of "conditioning"

Currently due to advertising and media have caused confusion between the concept of "regulating fan" while in fact it is just a steam-cooled fan . Therefore, it is not necessary to confuse the "regulating fan" with the actual air conditioner , because this "harmonic " fan really only works to add moisture and take advantage of the evaporation to cool the air in the form of dynamic, depending on weather conditions (humidity and temperature) when used.

"Air-conditioning" fans do not have the ability to actively increase or decrease the temperature like real air conditioning devices. Not to mention the current "air-conditioning fan" consumes water and occupies a lot of used area, requiring airy space when using.