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Do you know the basic working of a refrigerator system

We all know embedded systems help in the application of many products, from the smartwatch to the refrigerator. In the modern world, refrigerators have attained a level that no one ever dreamed of this evolution. With embedded software development, the world is becoming a better place. Do you ever wonder how your fridge supports giving you fresh food? This article will provide a little understanding of the basic working of a refrigerator system.

Main Components Of A Refrigerator


The compressor compresses the air. In refrigeration, it makes the refrigerant hot. A compressor increases the temperature of a refrigerant by making it move into a low-volume pipe. As of this, the refrigerant which enters the compressor comes off as a high-pressure gas. You can see the compressor at the lower part of the fridge.


The condenser extracts the heat inside the refrigerator. You can see the condenser on the back side of the fridge. It condenses the vapor into a liquid state.

Thermostatic Expansion Valve

It controls the flow of liquid into the evaporator. It acts as a sensor and controls the compressor. If the expansion valve detects the interior is cool enough, it automatically switches off the compressor and vice versa.


Evaporators are present inside the fridge. It absorbs the heat and radiates it via the condenser. It makes the phase change of a liquid into a vapor state.

These are the common parts of the fridge, and there will be refrigerant liquids and fridge circuit boards for the proper working of the refrigerator. There are PCB layout services if you want to design a quality circuit board.

Working Of Refrigerator

The function of a refrigerator is to transfer heat from inner space to outer space. The question is how the refrigerant system does this thing. It does with the help of the essential components. It is a cyclic process done repeatedly to maintain the lower temperature in the fridge. In this cycle, the refrigerant (coolant) flows through the evaporator’s coils to the fridge’s inner surface, where the evaporator is available inside the refrigerator. The food inside the fridge generates heat. Inside the evaporator’s coils, the refrigerant evaporates due to the heat provided by the food items. This heat transforms the liquid state into the vapor state, making the refrigerator’s temperature fall. The gas then moves on to the compressor of the fridge. The compressor compresses the vapor, which raises the temperature and pressure of a system from high to low. The high-pressure and high-temperature gas flows to the condenser, and you can see this condenser on the back side of the refrigerator. The condenser again transforms the vapor into a liquid state. The condensed liquid flows through the thermostatic expansion valve, which helps in reducing the pressure before beginning the next cycle of this phase change. The process keeps repeating to attain the desired temperature value inside the refrigerator. 

With embedded software development services, more advancement is happening around refrigerators and home appliances.