peltier-minibar-nasil-sogutma-yapar

How Does a Peltier Mini Fridge Cool?

by Minibars

Thermoelectric (Peltier) coolers are semiconductor devices that function like small heat pumps. They consist of plates that heat up on one side and cool down on the other, operating on direct current and produced in various power levels depending on the direction of the current.

Metal-coated ceramic is used as the lateral plate to provide thermal conductivity, electrical insulation, and mechanical strength.

In Peltier technology, the absence of moving parts eliminates unwanted elements such as noisy vibrations, wear and tear, and oil leakage, making it easy to control capacity and temperature by simply reducing or increasing the current intensity, which is a significant advantage.

Peltier system minibars are environmentally friendly as they do not contain any refrigerants.

The most significant feature of Peltier cooling technology is its 35% lower electricity consumption compared to absorption system coolers.

In Turkey, minibar production using Peltier technology was first realized with the ISM brand.

absorbe-minibar-nasil-sogutma-yapar

How Does an Absorption Mini Fridge Cool?

by Minibars

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.

kompresorlu-minibar-nasil-sogutma-yapar

How Does a Compressor Mini Fridge Cool?

by Minibars

The operating principle of cooling systems relies entirely on heat transfer. In compressor minibars, the compressor’s role is to compress air to increase its pressure. The remaining heating and cooling processes continue in a cycle.

The refrigerant gas in the cooling system is compressed by the compressor. As the refrigerant is compressed, its temperature and pressure increase. The compressed refrigerant then moves from the compressor to the condenser. As the refrigerant gas passes through the condenser coil, heat is released to the surrounding environment because the ambient temperature is higher than the refrigerant’s temperature. As a result of heat transfer, the temperature of the refrigerant decreases. However, its pressure remains high, and it transitions into a liquid phase. The refrigerant then moves through the capillary tube. As it passes through the capillary tube, the pressure and evaporation temperature of the refrigerant decrease. The refrigerant, with its reduced pressure and evaporation temperature, absorbs heat from the air inside the minibar and from the beverages via air convection.

Hotel and hospital compressor minibars operate with R600A refrigerant gas. However, it’s known that R600A gas has explosive and flammable properties.

Compressor minibars, which operate on the same principle as household refrigerators, have a factory-set noise level of 38 dB. Our ears perceive sounds ranging from 0 to 140 dB, so hotel and hospital guests will hear the operating noise of the compressor minibar. In an environment where metal fatigue is also considered, the noise level of a compressor minibar that’s been in use for 2-3 years can reach up to 48 dB. Additionally, when operating 24 hours a day, the power consumption is 0.43 kW, achieving an A+ energy efficiency level.

Adult man in blue jacket uses safe in hotel room

What is a Hotel Room Safe?

by Room Safes

Room safes, also known as safe boxes, allow hotel guests to securely store their valuables (money, laptop, watch, jewelry, passport, etc.) in their room. In many hotels, we see safes designed to accommodate a 15″ laptop. The safes typically feature a thickness of steel ranging from 2mm to 5mm, electrostatic powder coating, and digital keypad locks as standard.

There are various brands and types of hotel room safes available in the market. However, many of them fall short in ensuring the security of valuables.

In the event of valuables being lost within the hotel room safe without being locked, the responsibility lies entirely with the guest. This factor underscores the importance of adequately sized and secure room safes that comply with security procedures.

The most critical feature hotel procurers should consider in their choice of room safes is the ability to transfer data from the safe, including the last 100 transactions (such as when and with which code it was opened or locked), to a computer system via a USB port and handheld terminal. Through this feature, hotel operators fulfill their responsibility to their customers in the event of potential losses.