Currently, the countries of the world are stepping up the study of solar air conditioning technology. According to the survey, solar air conditioning system is being established countries and regions such as Italy, Spain, Germany, the United States, Japan, South Korea, Singapore, Hong Kong. This is due to the air conditioning energy consumption in developed countries accounts for a sizeable proportion of the annual civilian energy consumption, use of solar-powered air-conditioning system of conventional energy savings, protecting the natural environment has a very important significance. It to play a greater role in the energy-saving and environmental protection in order to further broaden the range of applications of solar energy, solar air conditioning technology research carried out in the Ninth Five-Year Plan "period, the technology research and system demonstration aims to solve the solar air conditioning technology problems in order to lay a technical foundation for the early realization of the commercialization of solar air conditioning. A basic working principles of solar absorption air conditioning system mainly consists of two parts, solar collectors and absorption chillers. An absorption refrigeration working principle of the absorption type refrigerating binary solution consisting of two substances as working fluid. These two substances at the same pressures have different boiling points, wherein the high-boiling components is called absorbent, low-boiling components, is known as a refrigerant. Used absorbent - refrigerant combination of two types: one is lithium bromide - water, usually applied to large central air conditioning; another water - ammonia, usually for small air conditioning. Absorption chiller is mainly composed by the generator, a condenser, an evaporator and absorber, as shown in Figure 1. In this paper, the lithium bromide absorption chiller, for example. When the LiBr solution in the generator by the heating medium water heated in the chiller during operation, the water in the solution is constantly vaporized; steam entering the condenser is cooled by water cooling after condensation; With the continuous vaporization of the water, the generator the concentration of the solution inside the rising into the absorber; when the water inside the condenser into the evaporator via a throttle, the rapid expansion of the vaporized, and the water-refrigerant heat substantial absorption within the evaporator in the vaporization process, thereby to achieve cooling cooling purposes; in this process, low-temperature water vapor into the absorber, concentrated lithium bromide solution is absorbed within the absorbent concentration of the solution is gradually reduced by the solution is pumped back to the generator, and completion of the entire cycle.