The full DC variable frequency compressor continuously adjusts its output power according to the water temperature requirements, reducing frequent start stop and accurately maintaining the constant temperature of the pool water; Compared to fixed frequency pool heat pumps, it significantly reduces power consumption. Suitable for underground embedded swimming pools, above ground swimming pools, swimming spas, and temperature controlled soaking pools; Support seasonal heating or year-round constant temperature operation for household and small homestay swimming pools. Aerodynamic optimization and shock-absorbing structure design of the fan, with low operating noise and no disturbance to residents and neighbors, suitable for outdoor installation in courtyards. System optimization design, stable operation under variable outdoor temperatures, meeting the heating needs of swimming pools in spring, summer, and autumn; Optional low-temperature models, suitable for low temperature areas in Europe. Equipped with high and low voltage protection, antifreeze protection, water flow monitoring, overheating protection, and fault self checking functions to avoid various abnormal faults and ensure the long-term safe operation of the unit. Compact body structure, saving yard space; The waterway connection is simple, easy to install and maintain, and can be directly connected to the existing swimming pool filtration and circulation system.