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Home Improvement

Understanding the Working Principle of Refrigerators

Refrigerators use the principles of refrigerant and evaporation to cool the food items within them. The refrigerant absorbs the heat from the food items and transfers it to cooler surroundings. Evaporation occurs when the heat of a food item is changed into a liquid. A cycle is then repeated to maintain the desired temperature. Here are some of the important principles of refrigerators shared by one of the best teams of Refrigerator Repair in Dubai. You can understand their working principle and make your refrigerators by learning about the principle behind them.

The Refrigerant Absorbs Heat From Food Items

A refrigerator absorbs heat from food items and transfers it to a cooler environment. As the refrigerator temperature goes down, the heat from the food items is transferred to the ambient air. This process makes it possible to keep perishable items cold for weeks and months. While refrigeration is a common household appliance, it would be difficult for most people to live without a refrigerator. For example, chilled water is refreshing for a sore throat, and it keeps the rest of the food items fresh.

Fridge Repair in Dubai, Home Appliances Repair in Dubai

Transfers Heat To Cooler Surroundings

There are three types of transfer of heat energy: radiation, conduction, and convection. The first is called conduction and occurs when the materials in contact vibrate. As the molecules in the warmer object vibrate more rapidly, they collide with those of the cooler object. The collision causes the molecules to vibrate more quickly, making the object warmer. The second type of transfer of heat energy occurs when a substance absorbs heat without increasing its temperature or changing its physical state. For example, ice melts, and boiling water turns into a gas.

Evaporation Cools The Surrounding Area

The evaporation process cools the surrounding area of a refrigerator by transferring heat from the liquid to the surrounding air. This process occurs at all temperatures and takes place from the surface of the liquid. Volatile liquids vaporize easily and absorb the heat of the surrounding air. The human body uses the process of evaporation to cool itself after exercising. The evaporation rate increases with temperature and decreases with pressure. On humid days, sweat accumulates more.

Condenser Coils

Keeping the refrigerator’s condenser coils clean will extend the appliance’s life and help save money. You can purchase a cleaning brush or narrow vacuum attachment for the task. Use a long-handled brush to scrub away any stubborn dust and dirt particles. Please start at the back of the refrigerator and rotate it clockwise to clean the front coils. Use a face mask to prevent yourself from breathing in dust.


A refrigerator works on the principle of evaporation, a process by which a liquid refrigerant turns into a gas. The evaporator transfers this energy to cool the surroundings and the refrigerator itself. It also acts as an expansion valve, allowing the refrigerant to pass from its lower-pressure state to its higher-pressure state. Once the evaporator reaches a certain temperature, it switches from liquid to gas, allowing the compressor to turn on and off.

Discharge Valves

The discharge valve in a refrigerator is a device that delivers fluid to a drain. The discharge valve assembly includes an inlet and an outlet. The valve member is movable from an open to a closed position. The discharge valve’s locking mechanism holds it in either position. Various configurations are available, including one with multiple ports, two parallel ports, and a single outlet. This design can reduce flutter in the refrigerator.

The essential data that you are familiar various parts of a fridge and how they really cooperate to protect our nourishment for longer timeframes.

Parts of an fridge

A fridge comprises of a few key parts that assume a pivotal part in the cooling system:

Expansion valve

Likewise alluded to as the stream control gadget, an extension valve controls the progression of the fluid refrigerant (otherwise called ‘coolant’) into the evaporator. As a matter of fact a tiny gadget is delicate to temperature changes of the refrigerant.


The Compressor comprises of an engine that ‘sucks in’ the refrigerant from the evaporator and packs it in a chamber to make a hot, high-pressure gas.


This part cools the material put away in a fridge. It comprises of finned tubes (made of metals with high warm conductivity to boost heat move) that ingest heat blown through a curl by a fan. The evaporator retains heat from the stuff kept inside, and because of this intensity, the fluid refrigerant transforms into fume.


The condenser comprises of a looped set of cylinders with outer blades and is situated at the back of the fridge. It helps in the liquefaction of the vaporous refrigerant by retaining its intensity and thusly removing it to the environmental factors.

As the intensity of the refrigerant is taken out, its temperature decreases to buildup temperature, and it impacts its state from fume to fluid.


Also alluded to as coolant, the fluid keeps the refrigeration cycle going. Truth be told, an exceptionally evolved synthetic is equipped for shifting back and forth between being a hot gas and a cool fluid. In the twentieth hundred years, fluorocarbons, particularly CFCs, were a typical decision as refrigerants. Notwithstanding, they are being supplanted by greater climate cordial refrigerants, for example, alkali, R-290, R-600A, and so on.

How a fridge system functions?

Fridges work by making the refrigerant circling inside them change from a fluid into a gas. This cycle, called dissipation, cools the encompassing region and produces the ideal result. You can test this cycle for yourself by taking a few liquor and putting a drop or two on your skin. As it dissipates, you ought to feel a chilling sensation – a similar fundamental guideline gives us safe food stockpiling.

To begin the vanishing system and change the refrigerant from fluid to gas, the strain on the refrigerant should be decreased through an outlet called the hairlike cylinder. The impact like happens when you utilize a spray item, for example, hair shower. The items in a vapor sprayer is the strain/fluid side, the power source is the hairlike cylinder, and the open space is the evaporator. At the point when you discharge the items into the lower pressure open space, it abandons a fluid to a gas.

To keep a fridge running


you should have the option to return the vaporous refrigerant once again to its fluid state, so the gas should be compacted to a higher strain and temperature once more. This is where the blower comes in. As referenced before, the blower gives a comparable impact to that of a bicycle siphon. You can detect the intensity expansion in the siphon while you siphon and pack the air.

Other point about fridge

When the blower has taken care of its responsibilities, the gas ought to be feeling the squeeze and hot. It should be cooled in the condenser, which is mounted on the rear of the fridge, so its items can be cooled by the encompassing air. At the point when the gas chills inside the condenser (still under high tension), it changes once more into a fluid.

Then, at that point, the fluid refrigerant flows back to the evaporator where the cycle starts from the very beginning once more.

Read more about Importance of Heating and Air Conditioning Repair and Maintenance Services

Babar Ramazan

Hi there, I am Babar Ramazan. Working in a Just Care Home maintenance company which is a leading service provider for Appliances Repair Service, Handyman Service. In our company, experienced and professional experts are available.

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