A swimming pool heat pump is a device that absorbs low-temperature heat energy from the air, compresses it into high-temperature heat energy, and then releases it into cold water to heat the water. Its working principle is similar to that of an air conditioner, based on the reverse Carnot cycle principle. A small amount of electricity drives the compressor. High-pressure liquid refrigerant evaporates into a gaseous state in the evaporator after passing through the expansion valve, absorbing a large amount of heat energy from the air. The gaseous refrigerant is then compressed by the compressor into a high-temperature, high-pressure liquid state, which then enters the condenser to release heat and heat the water. This cycle continues, heating the water to 50℃-65℃.
A traditional heat pump consists of five parts: a circulating liquid refrigerant, an evaporator, a compressor, a condenser, and an expansion valve. The evaporator evaporates the liquid refrigerant into a gaseous state and absorbs heat from the external environment. The compressor increases the temperature and pressure of the gas from the evaporator. The condenser transfers energy to the external environment and condenses the gas into a liquid. The expansion valve reduces the pressure of the liquid from the condenser, initiating a new refrigerant cycle.
Based on the source of heat absorption, heat pumps can be divided into three main series: air-source heat pumps, geothermal heat pumps, and water-source heat pumps. Pool heat pumps utilize heat energy from the air, belonging to the air-source heat pump category.
Compared to traditional gas, oil, and electric boilers, pool heat pumps primarily utilize heat energy from the air during operation, with electricity mainly used to drive the equipment, resulting in higher energy efficiency. The heating process of pool heat pumps involves no combustion and no exhaust emissions. Furthermore, the water-electricity separation design reduces the risk of electric shock and poisoning, and also reduces air pollutant emissions. Pool heat pumps typically have a built-in microcomputer control system that can automatically complete tasks such as water addition, heating, and insulation according to preset parameters, achieving continuous heating.