A freezer compressor is a fundamental part of a fridge/freezer.
A freezer compressor is an electrically powered mechanical device found in most conventional refrigerator and freezer units. The freezer compressor is one of the main components that allow a freezer or refrigerator to work. The function of the freezer compressor is to take the cold gas that is emitted from the freezer area of the larger unit and put it under pressure until the temperature of the gas rises, after which it can be recycled through the refrigeration system to maintain the cold unit inside . The inner workings of a traditional freezer compressor uses a motor-style capacitor to pull the gas into a separate area, increasing its pressure as it moves. Over the life of a standard refrigerator or freezer, the constant switching on and off of the compressor can lead to problems that require maintenance or even complete replacement.
Refrigerators and freezers contain coils that heat and cool the gas.
Within the system that makes a refrigerator or freezer work, the freezer compressor sits between two sets of pipes or tubes known as evaporation coils and condenser coils. Depending on the freezer design, the compressor is usually located at the rear of the unit, close to or on the floor. When the compressor is activated, an audible hum can usually be heard coming from the refrigerator, while there is usually silence when the compressor is not active. Cooling inside the freezer or refrigerator only occurs if the freezer compressor is working properly.
A refrigerator or freezer operates by passing hot, high-pressure gas through a sequence of coils located at the rear of the unit until it begins to cool. Once cooled, the gas condenses into a liquid and is passed through a pressure valve which reduces the amount of pressure it is under, immediately causing it to boil and return to a gaseous state and reducing its temperature dramatically. The cooled gas is then passed through another set of coils within the freezer compartment, which pull heat out of the compartment and into the gas, which continues to cool as it loses pressure. The low pressure gas is eventually drawn out of the unit and compressed again to start the process again.
In this system, the freezer compressor is responsible for taking the low pressure cold gas coming out of the freezer compartment and pumping it to a separate area until the gas is compressed and again under high pressure. The compression of the gas causes an increase in temperature. When done, the gas can escape the compressor and eventually pass back through the pressure valve to start the refrigeration process again.
The freezer compressor is controlled by a thermostat inside the freezer unit. This causes the compressor to turn on and off constantly throughout the day. Over time, the compressor can get into trouble because of this and can malfunction, requiring maintenance. The level of heat generated by compressing the gas can also cause the oil inside the device to heat up and become a thick, dirty layer that can inhibit efficient operation.