As a technology of energy efficiency and environment protection, Water Source Heat Pump(WSHP) had been applied to the field of heating, ventilating and air conditioning widely in developed countries. At present, because the core of some necessary subassemblies can't be produced in China, some remarkable technology gap in the field of research and application between China and the developed countries has been brought on. To reduce this gap, with the help of the social and natural fund of Beijing education co...