Air source heat pump is an energy-saving device that utilizes high-level energy to transfer heat from low-level heat source air to high-level heat source. It is a form of heat pump. As the name suggests, a heat pump, like a pump, can convert low-level heat energy that cannot be directly utilized (such as the heat contained in air, soil, and water) into usable high-level heat energy, thereby achieving the goal of saving some high-level energy (such as coal, gas, oil, electricity, etc.)&Nbsp Air source heat pumps have the following characteristics: (1) The air source heat pump system integrates cold and heat sources, without the need for a dedicated refrigeration room or boiler room. The unit can be placed on the roof or ground at will, without occupying the effective usable area of the building, making construction and installation very simple (2) The air source heat pump system has no cooling water system, no cooling water consumption, and no cooling water system power consumption. In addition, there have been many reports of Legionella infection caused by cooling water pollution, and from a safety and health perspective, considering air source heat pumps also has obvious advantages (3) The air source heat pump system is safe, reliable, and pollution-free due to the absence of boilers, corresponding boiler fuel supply systems, dust removal systems, and flue gas emission systems (4) The air source heat pump cold (hot) water unit adopts a modular design, without the need for a backup unit. During operation, the computer automatically controls and adjusts the operating status of the unit to adapt the output power to the working environment (5) The performance of air source heat pumps will vary with outdoor climate changes