Constant-temperature heat pump series unit is a new type of pool constant-temperature heating equipment. It uses reliable constant-temperature technology and efficient titanium alloy exchanger to absorb low-grade heat energy from the air to heat or maintain the pool constant temperature. It completely breaks the pattern of heating relying on different renewable energy sources and effectively improves the safety and flexibility of pool heating and constant-temperature.It is widely used in villa (family) swimming pool, spa swimming pool, large swimming pool, hot spring, hot soak pool and other places.