Relative to the output temperature below 55 ℃ heat pump technology, high-temperature ground source heat pump without increasing the temperature of low-temperature heat source (ground source), the heat pump heating temperature reached 60 ℃ above, and maintain high operating efficiency and stable operation , Generally need to solve the following key technologies. Compressor options: At present, the types of compressors commonly used in heat pump equipment are screw compressors, fully enclosed scroll compressors and semi-hermetic piston compressors. After comparing the operating characteristics of different types of compressors, the current high-temperature heat pump equipment is generally used Semi-hermetic piston compressor; working fluid selection: According to the maximum working pressure of high-temperature heat pump equipment ≤ 25bar, using environmentally friendly R134a as a refrigerant refrigerant, no pollution to the environment, no damage to the ozone layer; the design of the circulatory system: Multi-channel independent refrigeration cycle system, sharing a water circulation system, reducing the condensing equipment operating temperature and pressure; In the device to add a special heat exchange device (economizer), increase the stability of equipment operation; System control optimization: The optimal control mode of the average compressor running time is adopted to ensure the stable operation and service life of the whole unit for a long time under high temperature and adjust the operating conditions and conditions of the high temperature heat pump according to the temperature of the ground source and the temperature of the winter heat source.