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Working principle of swimming pool heat pump

Apr 23, 2026

Refrigeration Principle

According to the principle of refrigeration systems, low-temperature, low-pressure liquid refrigerant exchanges heat with the surrounding water in the evaporator. The evaporator absorbs heat from the water and evaporates into a low-temperature, low-pressure gaseous state. During the evaporation process, the refrigerant temperature remains constant. The low-temperature, low-pressure gaseous refrigerant enters the compressor and is compressed into a high-temperature, high-pressure gaseous state. It then enters the condenser, where it exchanges heat with the ambient medium. Some of the heat from the high-temperature, high-pressure gaseous state is absorbed by the medium, causing the medium temperature to rise. The refrigerant releases heat, and the condenser transforms the refrigerant into a high-temperature, high-pressure liquid state. The condenser temperature remains constant during this process. The refrigerant then enters the expansion valve for throttling, a rapid cooling process that transforms the refrigerant into a low-temperature, low-pressure liquid state. After this process, the refrigerant re-enters the evaporator for heat exchange and evaporation, thus completing the entire refrigeration system process. This cycle is continuous, allowing the water to be continuously cooled.

 

Pool heat pump technology

The technology of using the reverse Carnot cycle principle to transfer heat from a low-grade heat source to a high-grade heat source under the drive of high-grade energy means that it transforms a heat source that cannot be directly used into a usable high-grade heat source, thereby achieving a partial saving of primary high-grade energy.

Types of swimming pool heat pumps

Groundwater pool heat pump systems extract groundwater from wells and send it to the pool heat pump unit, where it exchanges heat with the working medium of the heat pump before being reinjected back into the original ground. Surface water pool heat pump systems use river water, driven by a circulating pump, to flow directly through the pool heat pump unit after treatment or to exchange heat through an intermediate heat exchanger. Soil source pool heat pump systems use the earth's soil as a heat source, burying the heat pump's heat exchanger underground, and using the pump's circulating fluid to exchange heat with the earth's soil. Air source pool heat pump systems use a special working fluid to absorb heat from the atmosphere for heat exchange.

Pool heat pumps heat water by continuously circulating refrigerant and exchanging heat with the pool water. At the same time, they do not release additional heat energy or emit harmful substances during operation. The working fluid is completely separated from the pool water, so it will not cause secondary pollution. It is an energy-saving and environmentally friendly product. Therefore, in today's advocacy of energy conservation and environmental protection, pool heat pumps will surely usher in rapid development.

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