The so-called solar cooling, solar collector heat medium water absorption chiller to provide its generator. The higher the temperature of the heat medium of water, the higher coefficient of performance (also known as COP) the refrigerator, so that the refrigeration efficiency of the air conditioning system is also higher. For example, so if heat medium water temperature 60 ° C, the chiller COP of about 0 to 40; HTM water temperature is about 90 ℃, the chiller COP of about 0 to 70; heat medium water temperature is about 120 ℃ refrigerator COP up to 110 or more. Practice has proved that the use of combined solar heat pipe vacuum tube collectors with lithium bromide absorption chiller air conditioning technology program is successful, it is for the use of solar thermal technology has opened up new application areas. : The basic working principle of solar absorption air conditioning system mainly consists of two parts of the 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 composed mainly by a generator, a condenser, an evaporator and absorber. 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. Finally, really easy to use, the most important thing is to look at the local rich solar energy resources.