Traditional air conditioning energy saving is mainly based on drenching water treatment, that is, a large amount of water (water-gas ratio in humidification process? =0.4~0.5。 What is the water-gas ratio during dehumidification? =0.6~ 1.0) exchanges heat and moisture with air through high-pressure spray to achieve the required purpose. Therefore, its investment cost and operation cost are high, and at the same time, it is frequently maintained and consumes a lot of energy.
"Fog" air-conditioning energy-saving atomizer uses mechanical spray to treat air. Energy-saving atomizer for air conditioning has high heat and moisture exchange efficiency and low water-gas ratio (water-gas ratio in humidification process? ≤0. 1, water-gas ratio during dehumidification? ≤0.4) Practice has proved that the air-conditioning energy-saving atomizer simplifies the traditional air-conditioning energy-saving spray device and spray pump, optimizes the structure of water baffle, reduces the air resistance and improves the heat and moisture exchange efficiency. The spray pump can be stopped in spring, autumn and winter all year round. Compared with the air conditioner without atomization cooling system, the air conditioner with atomization cooling system adopts external water atomization. The defrosting, disinfection and dust removal of the energy-saving atomizer of "fog" air conditioner use a small amount of water to generate the same amount of fine fog for direct humidification, which not only meets the requirements of heat preservation and humidification, but also has the purposes of convenient consumption, convenient adjustment, simple maintenance and low operating cost.
Principle:
1. Principle of air conditioning energy-saving system
When the running air-conditioning energy-saving system opens the water supply valve, the air-conditioning energy-saving atomizer sprays water mist, and the heat and moisture exchange between air and water begins immediately, and then the transfer of sensible heat and latent heat occurs. If the air conditioner energy-saving atomizer sprays circulating water, its air conditioner will complete the process of isenthalpic humidification; If deep well water or low-temperature frozen water is sprayed, the air conditioner will complete the process of enthalpy reduction and dehumidification; If steam or hot water is sprayed, the air conditioner will complete the process of increasing enthalpy and humidifying. As shown in figure 1- 1.
Figure 1- 1 typical flow chart
1. isenthalpic humidification 2. Enthalpy reduction and dehumidification III. Enthalpy increase and humidification
Due to the direct contact between fog and air, which lasts for a certain time and distance, the weight of dust increases when it falls into the earth when it meets water. Therefore, air treatment and washing are carried out at the same time to purify the air.
2. The principle of "fog" air conditioner energy-saving atomizer.
The energy-saving atomizer of "fog" air conditioner sprays by mechanical atomization. The mechanical atomization of the fog-sky adjustable energy atomizer is a mechanism with a rack on the side wall of a centrifugal atomizing disk connected to the output shaft of a micromotor, which consists of a water inlet pipe and a water outlet pipe, the water outlet pipe corresponds to the inner cavity of the centrifugal atomizing disk, and the outer edge of the centrifugal atomizing disk is a trumpet-shaped mist outlet. The spraying mechanism of the energy-saving atomizer for air conditioning is realized by the principle of "secondary division". The centrifugal force and negative pressure of the centrifugal atomizing disk driven by the high-speed rotation of the micro-motor greatly exceed the attraction of gravity acceleration, so that water droplets are suspended in the inner cavity of the atomizing disk, collide with the rack on the side wall of the atomizing disk under the action of high centrifugal force, and are crushed into tiny water mist after repeated high-speed collisions, and fly tangentially from the atomizing disk to the space around the condenser to form a water curtain. The formation of this water curtain is called "one-time segmentation". The water curtain is combined with the conveyed air under the pressure of the condenser fan. The lift of the condenser fan blades makes the fan generate pressure, and air flows from the low-pressure end to the high-pressure end, which means that the fan has the ability to transport air. The formation of "dichotomy" is called "absorbing the excess heat of the condenser, crushing it, forming fine water particles and evaporating it into" fog ". This is the "secondary division" principle of air-conditioning energy-saving atomizer spray. At this time, under the strong stirring of airflow, air and fog are mixed into ventilation fog flow to reduce the humidity and temperature of the condenser edge environment. Because the centrifugal atomizing disk is constantly rotated by the motor and continuously supplied with water, the whole process of air treatment by energy-saving atomizer of air conditioner is realized and completed.
In the first water droplet segmentation process, the diameter of water mist particles after segmentation plays a key role in energy saving. "Fog" air conditioning energy-saving atomization refrigeration system has been successfully developed for four years-the first in the world. At present, 2 invention patents and 8 utility model patents have been authorized. Using water mist atomization to cool the radiator of air conditioning outdoor unit has obvious energy-saving effect.
3. Heat and moisture exchange model between water and air.
The heat and moisture exchange model between water and air has been clarified in many textbooks. The restatement here is to explain the mechanism that energy-saving air conditioners can realize efficient heat and moisture exchange.
As we all know, the heat and moisture exchange process between water and air is very complicated, because there are many factors in this exchange, and it is difficult to sample, so experts have established a model of water and air exchange.
Figure 1-2 heat and moisture exchange model of water and air
Suppose a water drop suspended in the air is taken out from the water mist sprayed by the energy-saving atomizer of the "fog" air conditioner for analysis. It can be clearly seen from figure 1-2 that there is a thin layer of saturated air around the water drop, and its temperature is close to that of the water drop. The heat and moisture exchange between air and water is carried out through this saturated air layer. When the water molecules generated by the saturated air layer and the surrounding air evaporate or condense due to the steam pressure difference, the water exchange between air and water is realized, accompanied by the exchange of sensible heat and latent heat. Then we can clearly see that the smaller the droplet, the longer the contact time with air, the more thorough the exchange and the higher the efficiency. The heat and moisture exchange efficiency of traditional shower room air conditioner is related to air weight, wind speed, water-gas ratio, nozzle type, nozzle distribution density and shower room structure. Therefore, if the shower room air conditioner wants to have high exchange efficiency, it must have fine water particles and high-pressure water spray. This requires high pump head, small nozzle diameter, large water-gas ratio and low wind speed; The shower room is very big. Energy consumption is also high.
Energy-saving air conditioning, using air conditioning energy-saving atomizer, so that the sprayed droplets are fine, forming fine water mist around the air conditioning unit. Compared with the traditional shower room, the time of direct contact and exchange between water and air is doubled, so the exchange is thorough and the corresponding water-gas ratio is small. At the same time, the finer the water particles, the more water particles per unit volume, the larger the direct contact area between water and air, and the higher the exchange efficiency. From the model analysis of heat and moisture exchange between water and air, we can clearly see the comparison of energy-saving atomizer of air conditioner and traditional air conditioner in water shower room. It has two obvious advantages: first, the water particles are fine, and the heat and moisture exchange area is increased; Second, the heat and moisture exchange time is increased. Therefore, under the premise of achieving the same heat and moisture exchange effect, the air-conditioning energy-saving atomizer obviously reduces the water-gas ratio, obviously improves the heat and moisture exchange efficiency, and obtains considerable energy-saving and water-saving effects.