A heat pump is a device that does not directly generate thermal energy.
His job is to collect low-potential energy from the external environment, and transfer it to the interior of the room.
outdoor heat exchanger
indoor heat exchanger
How can we see this? ...
Pumping the pump wheel, you can feel how its body heats up. This heated compressed gas - air.
If it had been possible to squeeze it even harder, it would have turned into a liquid - liquefied gas.
By this principle, the heat pump compressor operates.
By compressing the refrigerant in the internal heat exchanger, it receives heat.
If you pour alcohol on your hand, you can observe the same effect that produces liquefied gas evaporating.
The hand will be cooled by the evaporating liquid.
So the refrigerant, evaporating in the indoor or outdoor heat exchanger - absorbs heat either from the room or from the outdoor air.
The outdoor unit heat exchanger in the cold season is covered with frost, collecting heat from the environment.
One of the most common examples of a heat pump is air conditioning.
While working on cooling, the refrigerant evaporates in the indoor unit taking heat from the room and transferring it through the outdoor unit to the external environment.
Work on heat goes in the reverse order.
Therefore, as the temperature of the outdoor unit decreases, it becomes increasingly difficult to collect energy from the environment.
In this mode, the main thing is the quality of the outdoor unit.
If, in this system, to replace the indoor unit of the air conditioner with Hydroset hydrobox, we get a system that used to call a HEAT PUMP.
And already to it are connected radiators and warm floors...