How Does a Fridge Work?
Refrigerators operate on the principle of evaporation. Through the compression and depressurization of refrigerant, these appliances generate cool air, which is then circulated to maintain the freshness of stored food. The essential components involved in this process are the compressor, evaporator coils, and condenser coils.
1. Compressor: The compressor, often referred to as the heart of the refrigerator, is a pump responsible for compressing refrigerant in its gaseous form. The compressed gas is then released and condensed into a hot liquid. This liquid travels through condenser coils, dissipating heat and transforming back into a gas. The refrigerant then reaches the evaporator coils within the cooling compartment, where it expands, causing the coils to become cold. This cycle repeats as the gas returns to the compressor.
2. Evaporator Fan Motor: Some refrigerators are equipped with an evaporator fan motor situated near the top of the evaporator. This component plays a crucial role in distributing the cold air generated by the evaporator. Coordinating with the compressor, the fan blade draws air through the evaporator, circulating it throughout the cabinet and maintaining a consistent temperature.
3. Condenser Fan Motor: Not present in all refrigerators, the condenser fan motor is typically found in larger appliances. Its purpose is to assist in dissipating the heat generated during the refrigeration process. Operating in conjunction with the compressor, the condenser fan motor aids in maintaining optimal temperature conditions.
Flowchart
Here's a simplified flowchart to represent how a fridge works:
+-----------------------+
| |
| Start Process |
| |
+-----------------------+
|
v
+-----------------------+
| |
| Thermostat Control |
| Temperature |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Compressor On/Off |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Compressor |
| (Compression Cycle) |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Condenser Coils |
| (Dissipate Heat) |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Evaporator Coils |
| (Generate Cold Air) |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Evaporator Fan Motor |
| (Distribute Cold |
| Air) |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Condenser Fan Motor |
| (Dissipate Heat) |
| |
+-----------------------+
|
v
+-----------------------+
| |
| Frost-Free or |
| Self-Defrosting Cycle |
| |
+-----------|-----------+
|
v
+-----------------------+
| |
| Water Dispenser |
| Operation |
| |
+-----------------------+
|
v
+-----------------------+
| |
| End Process |
| |
+-----------------------+
Refrigerator’s Main Components
1. Thermostat: Every refrigerator features a thermostat that controls the internal temperature. The thermostat contains a phial with an inert gas, monitoring the temperature inside the refrigerator. As the gas expands or contracts with temperature changes, it triggers a switch mechanism connected to a bellows, powering the compressor until the desired temperature is reached.
2. Compressor: The compressor, essential for refrigeration, consists of an electric motor that drives a single-chamber compressor. Oil inside the compressor cools and lubricates the mechanical components during operation. The compressor runs hot under normal conditions, playing a pivotal role in the refrigeration process.
3. Evaporator Fan Motor: Responsible for distributing cold air, the evaporator fan motor operates in sync with the compressor. Its fan blade draws air through the evaporator, ensuring an even distribution of cold air throughout the refrigerator cabinet.
4. Condenser Fan Motor: Present in larger refrigerators, the condenser fan motor aids in dissipating heat generated during the refrigeration process. It operates alongside the compressor to maintain optimal temperature conditions.
Frost-Free Fridge Freezer
A "Frost-Free" refrigerator automatically defrosts any ice build-up on a daily basis. The defrost cycle involves the formation of ice during the compressor on cycle, periodic defrosting, drainage of defrosted water into a reservoir, and evaporation of the water through heat from the compressor. This process occurs approximately every 20 minutes for every 8 hours of accumulated refrigeration.
Self-Defrosting Fridge
In a self-defrosting fridge, a thin layer of ice forms on the rear wall during the compressor on cycle. When the compressor is off, this ice defrosts, and the water runs into a drain channel. The defrosted water accumulates in a reservoir, and heat from the compressor evaporates the water.
Water Dispenser in Fridge
Refrigerators from our range feature both plumbed and non-plumbed water dispensers. The water dispenser operation depends on the model; generally, pressing the plastic lever on the door opens a valve in the appliance, releasing chilled water. Non-plumbed dispensers, conveniently located on the fridge door, maximize storage space, with an easy-to-fill tank holding up to 2 liters of water.
To ensure the longevity and hygiene of your appliance, it's crucial to regularly clean the water dispenser. Our guide on how to clean the water dispenser in your fridge freezer provides step-by-step instructions for maintaining a fresh and hygienic water dispensing system.
In conclusion, understanding the intricacies of how a refrigerator works enhances our appreciation for these indispensable appliances that play a vital role in preserving the freshness and longevity of our food.