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How Does An Air Source Heat Pump Work?

How Does An Air Source Heat Pump Work?

15 Nov, 2023

As we navigate the complexities of modern energy solutions, the quest for more sustainable and efficient heating technologies has led to the rise of air source heat pumps (ASHPs). These devices are gaining popularity due to their capacity to use ambient air to heat home and commercial environments. In this article, we delve into the intricate workings of air source heat pumps.

How Do Air Source Heat Pumps Work?

Air source heat pumps work by absorbing heat from the outside air and transferring it indoors for space heating and hot water. The key components of an ASHP include an evaporator, a compressor, a condenser, and an expansion valve. Let's break down the process step by step.

Wholesale Air Source Heat Pump Water Heater Facotry

Wholesale Air Source Heat Pump Water Heater Facotry

Absorption Of Heat: The Evaporator

The evaporator is an important component of an air source heat pump since it initiates the heat exchange process. The evaporator, which is located outside, holds a refrigerant with a low boiling point. This refrigerant efficiently absorbs heat from the surrounding outside air as it flows around the coil within the evaporator. Remarkably, even in colder climates, where conventional wisdom might suggest a lack of heat, there is still enough thermal energy present for the air source heat pump to capture and utilize. The effectiveness of this process directly impacts the overall efficiency of the system in providing heating for indoor spaces and hot water applications.

Compression: The Compressor

After absorbing heat from the outdoor air, the refrigerant transforms into a low-pressure gas. The compressor, a vital component of the air source heat pump, steps in at this stage. Its primary role is to elevate the temperature and pressure of the refrigerant, transitioning it into a high-temperature, high-pressure gas. This compression operation is energy-intensive yet necessary for the heat pump cycle's succeeding phases. The compressor sets the foundation for effective heat release within the structure by boosting the energy potential of the refrigerant.

Air To Water Heat Pumps Factory

Air To Water Heat Pumps Factory

Heat Release: The Condenser

The condenser, typically located indoors, is where the magic happens. The high-temperature, high-pressure gas enters the condenser coil, releasing the absorbed heat into the indoor space. This phase of the process is crucial for providing warmth to the building and facilitating hot water production. The efficiency of the condenser has a direct impact on the heating capacity of the air source heat pump. Condenser systems that are well-designed enhance heat transmission from the refrigerant to the interior environment, delivering a comfortable and steady temperature.

Expansion: The Expansion Valve

The refrigerant returns to a liquid condition when it exits the condenser, although it is still under tremendous pressure. The expansion valve serves as a gateway, allowing the liquid refrigerant to be lowered in pressure. This reduction in pressure causes the refrigerant to undergo a phase change, turning it back into a low-pressure gas. The cycle is then ready to begin anew, as the low-pressure gas is drawn back into the evaporator to repeat the heat absorption process.

Air Source Heating Suppliers

Air Source Heating Suppliers


Air source heat pumps are set to become even more crucial to the worldwide drive toward sustainable and environmentally aware energy solutions as technology advances. If you are looking for a reliable air source heat pump manufacturer, AIROSD is ideal for you. Please feel free to contact us!

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