Mini fridges that operate by absorption cooling achieve cooling between +2/+8 degrees Celsius by being powered with 220 volts in an environment where the outside temperature ranges from 16 to 32 degrees Celsius. They work with a type of regeneration cycle that allows the same cooling substance to be used multiple times. To achieve the cooling cycle through absorption cooling principles, two elements that absorb each other and a prime gas for pressurization are used. This gas is ammonia. This pressurized mixture undergoes a phase change of ammonia gas within the system by heating with any heat source (electricity), resulting in cooling. Ammonia gas has zero impact on the ozone layer and global warming.
Due to the absence of moving parts within the absorption system minibar, it does not generate vibrations and operates at 0 dB noise level. In small living spaces like hotel rooms, having a cooling system that operates silently is crucial. With no moving parts, maintenance costs are minimized, ensuring long-lasting usage of these systems.