Temperatures are relatively low in winter, so air conditioners almost lose their heating capabilities, and heating must rely on coal and gas as the main heat sources. However, the emergence of low-temperature air source heat pumps has changed this situation. Low-temperature air source heat pumps have gradually replaced coal-fired "leading position" in northern heating with their unique advantages of energy conservation, environmental protection, and efficient heating. Fan coil heating can also be achieved using air source heat pumps. Air source heat pumps absorb low-temperature heat energy in the air through the action of environmentally friendly refrigerants. After being processed by the heat pump compressor, they can generate high refrigerant vapor, thereby exchanging heat into indoor circulating water. , and finally achieve indoor heating.
Why can air source heat pumps still provide heating and operate efficiently in such a cold north?
In the heating process of air conditioners in winter, our air conditioners are actually "air source heat pumps". You should not understand that air source heat pumps are water heaters. Do you understand what a pump is? A water pump pumps water, and a heat pump naturally pumps heat? The air conditioner extracts heat from the outdoor air in winter and sends the heat to the room. This is the heating principle of air conditioning!
When the air conditioner is heating, the four-way valve is switched. The outdoor unit is the evaporator, and the indoor unit is the condenser. It is still what "Carnot" said: only the evaporation temperature of the refrigerant in the evaporator is lower than that outdoors. Only when the ambient temperature is high can heat transfer from outdoor air to the refrigerant occur.
