The weather is hot, not only air conditioning hot selling electric fans are also quite off fire, especially a kind of air conditioning fan can blow cold air, because of the cost-effective, refrigeration effect is better than ordinary electric fans, by the majority of consumers. Although this kind of air-conditioning fan is not a long time coming out, but the variety is relatively rich, so that consumers do not know what to do when they choose to buy. Generally speaking, it is better to choose ice-crystal air-conditioning fan when purchasing, which has low noise and even refrigeration. At the same time, the following factors should be considered.

Power of air conditioning fan

Air conditioning fan is a new concept of the fan, both air supply, air conditioning fan principle refrigeration, heating and purification of air, humidification and other functions in one, with water as the medium, can be sent in a short time the same as the water temperature of the wind, cold and warm can be. Compared with electric fans, air conditioning fans have the function of humidifying air, but their power is much higher than traditional fans, about 60-80W, but much lower than air conditioning. The price is very friendly. The general air-conditioning fan is 55-60W 24 hours to use 2 degrees of electricity, cold and warm air-conditioning fan is generally about 2000W.

Principles and diagrams of air conditioning fans

The cooling principle of air conditioning fans is an electric fan equipped with water cooling (ice) devices. Single-phase shaded asynchronous motor or single-phase permanent magnet synchronous motor drives water (or ice water) cord up and down slowly moving and rolling, driven by a single-phase capacitor running motor fan around the water curtain has a certain humidity of cold air blowing out, because of a certain humidity, but also the role of purifying the air. The other is to install a water pump in the air-conditioning fan, in which the water pump can make the air cooled in the water cycle, blowing out cold air below room temperature. There is no compressor in the air-conditioning fan, no Freon. The water is circulated in the machine by the built-in pump and the surrounding air is cooled. No matter what type of air conditioning fan, the actual cooling effect is the same.

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According to the different ways of water evaporation, there are two kinds of products, one is using wet mesh cloth electric cycle, when the air blowing, water evaporation, water evaporation at the same time, to absorb a lot of heat, the air temperature will drop, but the air humidity has increased, the summer air humidity is already high, it is likely to cause sweat can not evaporate. The cooling effect and time of an air conditioning fan (a cold fan) with ice cubes are better than that of water. The other is the special fiber wet curtain paper evaporator.

Evaporator is also a kind of inter wall heat exchanger. The liquid refrigerant at low temperature and low pressure vaporizes and absorbs heat on one side of the heat transfer wall, so that the medium on the other side of the heat transfer wall is cooled.  The cooling medium is usually water or air, and the evaporator can be divided into the following categories:

1. Cooling liquid (water or brine) evaporator, this evaporator can be divided into horizontal shell-tube evaporator (refrigerant evaporation outside the tube is full of liquid, refrigerant evaporation inside the tube is called dry), and standpipe cold water tank.

2. Cooling air evaporator, this kind of evaporator can be divided into two categories, one is air as natural convection evaporator tube, such as widely used in cold storage wall row, top row tube, generally made into vertical tube, single row snake tube, double row snake tube, double row U-tube or four row U-tube type, the other is forced air flow; A moving air-cooler, the air-cooler system used in a cold storage is made into a box type, and the air-conditioner system is usually made into a finned tube cluster. In such a cooler, the refrigerant flows through the tube by pressure difference, the gravity of the liquid or the pressure head produced by the liquid pump, because the cooled medium is air, and the heat release coefficient on the air side is very low.  Therefore, the heat transfer coefficient of evaporator is also very low. In order to improve the heat transfer performance, measures such as increasing the heat transfer temperature difference, adding fins to the heat transfer tube or increasing the air velocity are often adopted to achieve the purpose.

3, there is also a contact evaporator for cooling solid materials.

Because air conditioning fans (cold fans) do not have compressor without freon, it is not true refrigeration.

Air conditioning fan (cold fan) shopping

1. Before purchasing air-conditioning fans, consider the specific location of the fan, because the general air-conditioning fan power cord is not too long, also about 2M shape, plus air-conditioning fan to blow closer to more comfortable, if the power supply is too far away or from your usual place of rest is too far from the appropriate.

2. Cold air conditioning fans on the market can generally be refrigerated with ice cubes. More products will be given 1-2 small boxes containing "ice crystals" randomly. Because the ice point of ice crystals is minus 12 degrees C, it has the advantages of large cold storage capacity, long cooling time, and can be used repeatedly, and the effect of water freezing is not as good as ice crystals, so everyone must be different. I forgot to ask the salesperson for the ice crystal box.

3. In addition to cold fans, there is also a kind of cold and warm air-conditioning fan on the market. It can be used as warm air in winter. The price is 100-200 yuan more expensive than the same single-cooling product. If it is also needed in winter, the multi-functional cold and warm products are also a good choice.

4, the air volume of the air conditioning fan is related to its cooling effect. The average air volume of the air conditioning fan is about 6 meters. Standing three or four meters away, you should feel the obvious wind.

5, recognize the cooling way of air conditioning fan and choose according to actual needs. The advantages of water curtain refrigeration are small volume, low price and low power consumption. The water pump refrigeration system has the advantages of low noise and uniform refrigeration, but the price is high. Now there is ice crystal cool storage air conditioning fan.