Energy is the material basis of human survival and development. With the progress of human civilization and the development of society, human demand for energy is increasing. If we do not take measures in the process of energy consumption, it will lead to energy depletion, environmental degradation and many other serious consequences. Therefore, the development of new energy and renewable energy has become an urgent task and strategic goal for our country to develop national economy and build a well-off society in the 21st century. The working principle of the air source heat pump unit is to obtain a large amount of heat from the outdoor ambient air, transfer the heat to the indoor through electric energy, and then convert the low-level heat energy in the air into high-grade heat energy. The heat generated by the compressor. If the unit consumes 1% of the electricity, it can transport more than 2% of the air energy from the outdoor air and generate more than 3% of the thermal energy, thus greatly improving the utilization efficiency. At the same time, because energy is obtained from the air, it will not cause pollution to the environment. Heat pump technology is one of the important technical measures for the application of low renewable energy. How to use heat pump technology to use heat energy stored in soil, solar energy in groundwater or air, and waste heat generated in the process of life and production for building heating and hot water supply, so as to effectively reduce high potential dissipation rate energy? People pay more and more attention to this.