Cooling fans are usually divided into refrigeration industrial cooling fans and domestic cooling fans. Industrial cooling fans are generally used in cold storage and cold chain logistics refrigeration environments. Households are also called water-cooled air conditioners. They are a kind of cooling, ventilation, dustproof and deodorizing. Evaporative cooling and ventilation unit.
In addition to allowing fresh air and lowering temperatures in enterprise workshops, public places, commercial and entertainment venues, the air cooler has an important feature—energy saving and environmental protection! It is a new environmentally friendly product with no compressor, no refrigerant and no copper tube. The main component core—-evaporative wet curtain (multi-layer corrugated fiber laminate) and 1.1KW main motor / traditional central The air conditioner consumes 1/8 of electricity, which can save more electricity for various industries.
The air cooler (evaporative air conditioner) is composed of a special fiber corrugated honeycomb wet curtain with a large surface area, a high-efficiency energy-saving fan, a water circulation system, a floating ball valve water-filling device, a casing and electrical components.
The cooling fan (evaporative air conditioner) cooling principle is: when the fan is running, it enters the cavity to generate negative pressure, so that the outside air flows through the porous wet wet curtain surface to force the dry ball temperature of the curtain air to be close to the outside air. The wet bulb temperature, that is, the dry bulb temperature at the outlet of the cooling fan is 5-12 °C lower than the outdoor dry bulb temperature (up to 15 °C in dry heat), the hotter the air, the greater the temperature difference, the better the cooling effect. Since the air is always introduced into the room from outside (this is called a positive pressure system), it can keep the indoor air fresh. At the same time, because the machine uses the principle of evaporation and cooling, it has the dual functions of cooling and humidifying (relative temperature can reach 75%). Left and right), used in textile, knitting and other workshops, not only can improve the temperature and humidification conditions, but also purify the air, reduce the needle breakage rate in the needle spinning process, and improve the quality of the needle textile products. The air cooler (evaporative air conditioner) is surrounded by a honeycomb wet curtain using special materials, which has a large surface area, and the wet curtain is continuously humidified by the water circulation system; the high-efficiency low-noise energy-saving fan is installed in the wet curtain air cooler. When the fan is running, the negative pressure of the wet curtain air cooler causes the air outside the machine to flow through the porous wet curtain into the machine, and the heat of the water on the wet curtain absorbs heat, forcing the air passing through the wet curtain to cool down. At the same time, since the water on the wet curtain evaporates toward the air flowing through the wet curtain, the humidity of the air is increased, so the wet curtain air cooler has the dual functions of cooling and humidifying.
Commonly used in the industry is a dry cooling fan. It relies on the passage of air through the evaporative exhaust pipe in the chiller to cool the forced flow of air outside the pipe. It is installed in the floor of the cold storage, called the floor-standing chiller; it is installed on the top of the warehouse, called the top chiller.
Air cooler (evaporative air conditioner) covers the whole country
The main production base is in Fujian, and it has been radiated to various regions of Fujian and Sichuan, Guangdong, Zhejiang, Xinjiang, Hunan, Hubei, Guangxi, Henan, Hebei, Shandong, Shanxi, Jiangxi, Jiangsu, Yunnan, Guizhou, Anhui, Ningxia, Qinghai, Gansu, Shaanxi, Hainan, Inner Mongolia, Beijing, Shanghai, Chongqing, Tianjin, Taiwan, Hong Kong, and Macau.
The occupancy rate of 100 household electric fans in China’s urban residents has reached 200%, while the air conditioner ownership rate is still less than 10%. The main factors that create such disparity are price and power consumption. As far as the price is concerned, there is a gap of 300-2000 yuan between the electric fan and the single-cooling air-conditioning window machine, and there is no suitable main cooling fan product to fill. To this end, China’s patent system in the past 10 years (1985.4-1995.12) is expected to fill the above-mentioned blank non-mainstream chiller patent application search, a total of more than 200 related patent applications. From the cold source point of view, the number is the first of the water evaporation type (a third of the strong), followed by underground cooling type, semiconductor refrigeration type, refrigerator cooling type, low power air conditioning, solar cooling, gas Refrigeration and heat pipe cooling.
The number of applications for water evaporation and cooling is the highest because the water quality of the refrigerant is cheap and easy to obtain, and it has a high value of vaporization. The water evaporation method can be subdivided into a spray type, a ventilated water curtain type, a water permeable cold plate type, a porous water permeable grid type, etc., and the total heart component is one (or two) fans. In theory, The water has a vaporization calorific value of 2451 J/g at 30 ° C, that is, 1 gram of water can completely absorb 2451 J of heat. If the evaporation process is completed within 1 second and the rate is maintained, the cooling power is equivalent to 245 watts, which is equivalent to the cooling effect of a single KC24 single cold window machine. This is a very attractive value. Since the cooling effect of such fans is mainly determined by the ambient humidity and vertical velocity, this technology is not difficult to obtain good results in dry and hot areas of China. However, in the vast hot and humid areas of the south, due to the high average temperature in summer, the relative humidity is close to saturation, even if the spray of water mist is rarely converted into a vapor state, of course, it can not be said how much heat of vaporization is absorbed, and on the contrary, the degree of humidity in the room is increased. . Increase the discomfort of people. In order to improve the cooling effect of this type of humidifying chiller, Fuzhou combined vertical cooling fan proposed perfect measures, such as using a set of cold plates to separate the blown dry air from the blown wet air, and simultaneously exchange heat; The scheme of re-humidifying and cooling is to first absorb moisture into the airflow through the calcium chloride, lithium chloride or quicklime, and then make it into a dry air with a relative humidity of about 5%, and then humidify to cool it. Multi-stage dehumidification and humidification can be realized as needed, and calcium chloride after moisture absorption can be regenerated under sunlight. recycle.
The underground cooling type cooling fan can be subdivided into three types: groundwater, tap water and underground wind according to its cold source. The first two types need to introduce the water flow into the heat exchanger with the fan attached to the room, and then absorb the heat in the room before discharging it. Therefore, the water consumption is large. If a patent says that the water flow per hour needs 180 liters (0.18 tons) or more, this The type of chiller is only suitable for rural and urban households who can drill wells and take water. The tap water type cooling fan is difficult to be accepted by urban residents because of its large water consumption, high water temperature, and poor cooling effect. Underground wind-type chillers are only suitable for households close to civil air defense facilities, basements, etc., and the cold air extracted is often odorous and has no universal significance.
The semiconductor cooling type fan uses the Peltier cold and heat effect, which has the advantages of no noise, fast cooling speed, continuously adjustable cooling capacity, compact structure, no fear of vibration, small size, light weight, long service life, convenient installation and use. . The factors affecting the promotion are low energy efficiency and special DC (rectifier) power supply.
There are two options for the refrigerator to take the cold type. One is to install a fan system on the existing refrigerator, making it equivalent to a small power air conditioner, one machine for dual use. The second is to put the refrigerant (cold core) or ice cube processed by the refrigerator into a specially designed fan to blow out the cold air, such as using a high-efficiency cold storage core block. Its cold equivalent is 8 times that of ice and the core weight is 1.5 kg. The total cooling capacity is 4800kJ, and it can work continuously for 5 hours after being cooled once. This type of chiller has limited cooling capacity. Only suitable for small areas to cool down.
There are many patents that propose low-power air conditioning schemes such as air-conditioning accounts, air-conditioning bedspreads, and small air-conditioned rooms. Its power consumption is about 200 watts, which is equivalent to the power consumption of refrigerators. The problem is that the energy efficiency of this type of air conditioner is relatively low, the small area is closed, and the air freshness will soon deteriorate.
The solar refrigeration system can be divided into three basic types: adsorption/desorption, absorption and compression. The refrigeration capacity can be obtained according to the principles of compression refrigeration cycle, absorption-evaporation cycle, heat pump or solid adsorption. In theory, the greater the intensity of solar radiation, the greater the cooling capacity, and the outlook seems optimistic. However, due to the generally low COP value of solar refrigerators. According to reports, in order to obtain 2000 watts of cooling power, it is necessary to equip 10 square meters of collectors, the cost of up to 8,000 yuan.
In addition. There are also a few patents that propose a heat pipe refrigeration system using liquid ammonia as a working medium, a gas-fired refrigeration system using liquid ammonia or bromine as a working medium, and a refrigeration system using a saturated solution of an inorganic salt such as ammonium chloride. The feasibility of its production has yet to be further demonstrated.