Different type of freezers and their best uses
Before you get to know about the various types of freezers and their differences, let’s start with the ABC of freezers. A freezer is the most commonly used appliance, whether it’s domestically used or industrial. A freezer preserves the food at a very low temperature, preventing the food from microbial contamination or damage.
The cooling method freezer uses is very simple. Let’s start with the freezer parts.
Parts used in freezer
It’s the heart of a refrigerator. It pumps the refrigerant to all parts of the refrigerator for the refrigeration cycle to work repeatedly. The size of a compressor varies according to the size of a freezer. The larger the freezer, the more the load to cool the item, the larger the size of the compressor.
The compressor has the copper coiled in serpentine with the aluminum fins. The function of the compressor is to remove all the heat supplied to refrigerant during compression and the heat generated by the compressor during the compression process.
Its main purpose is to remove any moisture or dirt present in the refrigerant and prevent it from entering into the refrigeration system.
If the dirt is not removed the refrigerant will be blocked to enter the refrigeration system.
- Expansion valve
Its purposes are to control the flow of refrigerant. The high-pressure refrigerant enters the expansion valve and leaves at low pressure. Low-pressure refrigerant is the liquid refrigerant. The liquid refrigerant absorbs the heat in passing through the evaporator. This converts the refrigerant into gas. Compressor only allows the gas refrigerant to enter as gases can be compressed and liquids cannot.
Its function is to absorb all the heat in the refrigeration compartments and transfer them to the condenser.
The refrigerant goes into the compressor passing through the evaporator. Accumulator behaves as the refrigerant tank. It makes sure that the evaporator never runs out of it.
- Fan motor
Its function is to keep the compressor cooled. It is installed in the compressor room next to the compressor. If the blade of the fan is not proper, it will vibrate causing the machine to breakdown early.
How the freezer works
The process starts with the dried gaseous refrigerant entering the compressor. From here the compressed gas runs into the coils in the freezer. At this point, the gas it at a very high temperature.
As it passes through various coils, it begins to cool down. The refrigerant is cooled at very low temperature, turning it into liquid. This is then passed through the expansion valve. It converts the liquid refrigerant into a cold mist.
It then goes into the evaporator where it absorbs the heat of the freezer. This converts the refrigerant into gas. This gas then goes into the compressor through the accumulator and the process repeats.
Types of freezers
1. Chest Freezer
They are the most economic freezers. Chest freezers are used domestically as well as commercially. A chest freezer is a large box with a hinged door that opens upwards. Due to the large box, a chest freezer can store a large number of items. There are various chest freezer uses like for cold drinks, for meat, for ice-creams, etc.
There are small chest freezer and large chest freezers of various sizes available in the market. The chest freezers don’t have a fan which causes inconsistent temperature. This is due to non-uniform air circulation inside the freezer. This is the reason while people store items like meat at the bottom of the freezer. This allows freezing them solidly for longer. Chest freezers don’t have the auto defrost button. That means you have to defrost them manually.
2. Drawer freezer
These are generally used in places like restaurants, etc. The purpose of this freezers is the proper organization of daily use items. Drawers make the organization easier. There are various types of drawer freezer available in the market. They can be completely steel drawer freezer, freezer with pre-coated doors, or could be made as per your convenience. Some drawer freezer also has finished top to be used as a table.
3. Upright freezer
These are the horizontal freezer but are costlier than the chest freezer. They are generally found in hotel rooms, in the kitchen, etc. They have an auto-defrost function installed. So it gets defrost automatically. They have shelves inside for better organization of items.
4. Glass top deep freezer
They are also known as a deep freezer glass top. These are generally found in ice-cream shops, in confectioneries, etc. They have the glass at the top for better visibility of items. This makes the customers have a look at the variety available. They generally have few shelves to keep the small items organized.
5. Deep freezer
These are generally known as a deep freezer for ice-cream or frozen food, etc. The deep freezer temperature can go very below from -25 to -45 and in some cases can go up to -80 degrees Celsius. A deep freezer refrigerator doesn’t have drawers. They generally have a partition for the organization of items.
6. Portable deep freezer
They are also known as eutectic freezers. A portable deep freezer can hold the temperature for longer hours once fully charged. These deep freezer compressors are generally reciprocating. It makes transportation easier without the inconvenience of cooling them with ice.
They can be a small deep freezer or maybe a large deep freezer. This deep freezer can use AC & DC power or both. Some do have cable to use the car’s battery for charging.
Birla Aircon manufactures all of these. Choose the one that suits you best or contact us for more clarity.