Common types of refrigerants used in refrigerators include Freon, ammonia, carbon dioxide, R134a, R600a, R290, R404A, etc. Each refrigerant has its own unique characteristics and applicable scenarios.
Freon: This is the earliest generation of refrigerants with good refrigeration effect, but it has been gradually eliminated because of its destructive effect on the ozone layer.
Ammonia: Ammonia is a natural refrigerant with good refrigeration effect and environmental protection, but due to its toxicity, it is mainly used less in household refrigerators.
Carbon Dioxide: As a natural refrigerant, it has good environmental performance and will not cause damage to the atmosphere, but its refrigeration efficiency is relatively low and requires a higher working pressure.
R134a (Tetrafluoroethane): This is a widely used medium and low temperature refrigerant with good comprehensive performance and safety. It is a substitute for R12.
R600a (Isobutane): This is an environmentally friendly refrigerant derived from natural ingredients, with good refrigeration performance and safety, and is widely used in refrigerators.
R290 (Propane): It is a hydrocarbon refrigerant with excellent environmental performance, but has high safety requirements and is usually used in low-temperature refrigeration equipment with a small amount of liquid.
R404A: This is a mixed refrigerant commonly used in commercial refrigeration equipment with good refrigeration effect and environmental performance.
These refrigerants have their own advantages and disadvantages. The selection of a suitable refrigerant needs to be determined according to the specific application scenario and environmental protection requirements. With the improvement of environmental awareness, environmentally friendly refrigerants will become the mainstream in the future.