Author：Kevin
The refrigerant can cool, and its basic principle lies in its physical properties.
Refrigerant serves as the carrier of “cooling capacity” and “heat” for air conditioning. We know that air conditioning can transfer indoor heat to the outside or vice versa, thereby regulating indoor temperature and creating a comfortable environment. In addition to the work of various components such as compressors and heat exchangers, refrigerant is also essential for air conditioning.
As the carrier of the “cooling capacity” and “heat” of air conditioning, the working principle of refrigerant is as follows:
- The ability of air conditioning to transfer heat relies on the change in refrigerant state, specifically the transition between “gaseous” and “liquid” states. According to the basic knowledge of physics, when a substance changes from a gaseous state to a liquid state, it releases heat; On the contrary, it will absorb heat.
- When the refrigerant changes from liquid to gas, it needs to absorb heat from the outside. We have designed a component called the “evaporator” to allow the refrigerant to evaporate freely inside (from liquid to gas), thereby absorbing heat from the external environment (usually the air in the room) and achieving the purpose of refrigeration.
- When a refrigerant changes from a gaseous state to a liquid state, it needs to release heat to the outside world. We have designed a component called a “condenser” to allow the refrigerant to condense freely inside (from a gaseous state to a liquid state), thereby releasing heat to the external environment (usually outdoor air) and achieving the purpose of heat dissipation.
In the refrigeration system, the compressor drives the movement of the refrigerant. Another important component that causes the refrigerant to change its gaseous and liquid states is the expansion valve. It can transform refrigerant from liquid to a mixture of gas and liquid. The compressor works on the refrigerant, causing its heat to increase and transforming the low-pressure gaseous refrigerant into a high-pressure and high-temperature refrigerant. After condensation in the condenser, it passes through the expansion valve and becomes a low-temperature and low-pressure refrigerant gas-liquid mixture. It then evaporates completely in the evaporator and returns to the compressor for suction. Thus, a complete refrigeration cycle is completed, repeating the cycle.
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