Study On Optimizing The Multi-evaporator Air Conditioners

In China, the multi-evaporator air conditioners are applied more and more in recent years, which incarnates the traits of convenience,agility,comfort and energy saving, still it stands out the humanity idea of air conditioners systems. The multi-evaporator air conditioners rooted in Japan, and were introduced into our state. By developing for about ten years, we have some famous brands, such as Midea,Hair,Gree.The refrigerant tubes' length of multi-evaporator air conditioners could directly have influence on their refrigerating and heating abilities. We tested the MDV system K — 1 fixed in School of Environmental & Municipal Engineering'building of Xi'an University of Architecture & Technology, and we can get the temperature change curve along the refrigerant pipage in summer and the heating steam pipe in winter of multi-evaporator air conditioners. Then it was analysed and found the maximum academic effect radius under no flash vaporization before throttle, and more support the spread and application of the multi-evaporator air conditioners with theory.In this paper, we analysed the relationship of refrigerant pressure descending in the pipe and the along pipe and local flow resistances, then the method was put forward that lengthening the effect radius, and it supplied academic foundation for that the multi-evaporator air conditioners could be spreaded and widely used. Further, a field measurement of air-conditioning condensers' heat exchange process and its ventilation effect is carried out. Velocity field is analysed through the model of source and sink, and an optimal distance of condenser array is concluded so as to not short circuit. Considering the limited sapce, a better array project is proposed. Comparing with the air distribution's numerical simulation of the former array style, the inlet temperature of the latter one improves more greatly, and it can embody the advantages of energy and space saving.