How does the cooling and heating air source heat pump realize the cooling and heating functions?We all know that there are many series of air source heat pumps, such as heating and cooling, water and ground source, and drying. Today Leomon technology will give you a brief introduction to the working principle of air source heat pump system heating and cooling.
The air source heat pump is generally composed of a compressor, a condenser, an evaporator, and an expansion valve. The heat-conducting working medium (refrigerant) operates in a closed unit and uses the condenser and evaporator to exchange heat with the outside world.
The principle of air source heat pump heating:
During heating, the liquid refrigerant is vaporized in the air heat exchanger to absorb the heat in the air. The low-temperature and low-pressure gaseous refrigerant is compressed by the compressor and then turned into high-temperature and high-pressure gas and sent to the water heat exchanger (high efficiency tank). Since the temperature of the refrigerant is higher than the temperature of the water, the water will take away the heat and transfer it to the end to achieve heating. The refrigerant is cooled from the gas state to the liquid state. After the liquid refrigerant is throttled by the expansion valve, it enters the air heat exchanger under pressure, and the low-pressure gas refrigerant vaporizes again to complete a cycle. In this cycle, as the state of the refrigerant changes, the heat is transferred from the air side to the water side.
The principle of air source heat pump refrigeration:
During refrigeration, the liquid refrigerant vaporizes in the water heat exchanger, reducing the water temperature. The low-temperature and low-pressure gaseous refrigerant is compressed by the compressor to become high-temperature and high-pressure gas, and enters the air heat exchanger. Because the temperature of the refrigerant is higher than the air temperature, the refrigerant transfers heat to the air, and the refrigerant is condensed into a high-pressure low-temperature liquid by the gas. The liquid refrigerant enters the water heat exchanger after being throttled by the expansion valve. Since the temperature of the refrigerant is lower than the temperature of the water, the refrigerant absorbs the temperature of the water, and the water becomes cold water and proceeds to the end to achieve cooling. The low-pressure liquid refrigerant vaporizes again to complete a cycle. In this cycle, as the state of the refrigerant changes, the heat transfer from the water side to the air side is realized.
This is the so-called Carnot cycle and reverse Carnot cycle. Of course, to put it simply, it is through the transformation of the four-way valve. The components that pass through the refrigerant in the control press are different. The high temperature and high pressure refrigerant first passes through the high-efficiency tank. Heating is first passed through the evaporator and then cooling. This is the principle that air source energy heat pumps can be used for both cooling and heating, but it is worth noting that the two cannot be performed at the same time.