Summary of development process: High temperature water source heat pump generally refers to a heat pump unit that can directly recover and utilize low-grade residual (waste) heat resources at 20-55 degrees Celsius to produce hot water at 65-95 degrees Celsius. High temperature water source heat pump is relative to conventional water source heat pump or room temperature water source heat pump. Ordinary water source heat pumps generally use R22 refrigerant, so this type of heat pump is limited by the performance of the compressor. The evaporation temperature cannot exceed 12 degrees, and the condensation temperature cannot exceed 60 degrees. High temperature water source heat pump generally refers to a heat pump that can generate heat at an outlet temperature of 85 degrees Celsius. In the 1980s, Japan launched the Super Heat Pump Program and developed four types of heat pumps, including medium to high temperature heat pumps with evaporator inlet water of 45 degrees and heating outlet water temperature of 85 degrees; And a high-temperature heat pump that generates 150 degree steam by using 80 degree hot water. In Europe, a technical route has been adopted to improve the performance of centrifugal compressors, with the development of high-temperature heat pumps for centrifugal compressors, R134a refrigerant, and a three-stage centrifugal compression method, which can produce 85 degree hot water. In 2002, with the support of the Beijing Municipal Science and Technology Commission, China developed a high-temperature heat pump with independent intellectual property rights by Beijing Qingyuan Century Technology Co., Ltd. in collaboration with the Department of Thermal Energy Engineering at Tsinghua University. The temperature of the condenser's heating water can reach 95 degrees when the evaporator inlet water is 45 degrees Celsius. In March 2003, it passed the scientific and technological achievements appraisal of the Beijing Municipal Science and Technology Commission and the product testing of the National Air Conditioning Equipment Supervision and Inspection Center, In 2005, it was included in the National Torch Plan project and won the second prize of the Beijing Science and Technology Award, as well as honors such as Beijing's independent innovation products. The emergence of high-temperature water source heat pumps has greatly expanded the application field of heat pumps. They can directly recycle and utilize low-grade residual (waste) heat resources at 20-55 degrees Celsius to produce 65-95 degrees Celsius hot water, which is used for heating, crude oil heating, industrial insulation, production heat, and other fields. They can replace fuel oil, gas, and coal-fired boilers, saving a large amount of primary energy, and have very good energy-saving and environmental benefits. Related knowledge heat pump: A device that transfers heat from a low-temperature object to a high-temperature object through work, such as an air conditioner, which can also be considered a heat pump. During refrigeration, it transfers heat from a room with a low temperature of 25 degrees or below to outdoor air with a high temperature of 30 degrees or above. Heat pumps are divided into air source heat pumps using air as the heat source, such as household air conditioners and heat pump water heaters. A water source heat pump that uses water as the heat source, such as a regular (room temperature) water source heat pump that uses groundwater and soil with a temperature below 20 degrees Celsius as the heat source and produces a water outlet temperature of 40-55 degrees Celsius. A high-temperature water source heat pump that produces a water outlet temperature of 65-95 degrees Celsius uses geothermal tailwater with a temperature above 30 degrees Celsius, industrial waste hot water, central air conditioning waste heat, and oilfield sewage as the heat source. According to the working principle, heat pumps are divided into: absorption heat pumps, electric compression heat pumps, and electric compression heat pumps. According to the type of compressor, they are divided into: vortex compressor heat pumps (with a heating capacity of 10-50KW); Piston compressor heat pump (heating capacity 50-600KW); Screw compressor heat pump (heating capacity 100-4000KW); Centrifugal compressor heat pump (with a heating capacity of 2000-10000KW)