Deep Freezer Single Door Overview
Cooling food and Water has been an essential part of human life during the heat and scorching summers and then also for the preservation of food to avoid it from rotting and use it for later use. Before the invention of freezers, people used iceboxes, but the problem was that the ice melted in the kitchen or wherever the icebox was placed. The first freezer appeared in the 1940s, and then it was known as deep freeze, but the mass production was not continued until after World War II. Then the technological advances and due to the development in the field of science made deep freezer into a very advanced piece of equipment.
The first freezer was invented by William Cullen at the University of Glasgow in the year 1748. This discovery, however, was never used for practical purposes. It was later in 1805; US inventor Oliver Evans designed the first refrigeration machine that didn’t make use of liquid and used vapors instead for cooling purposes.
In 1857, the first gas freezer was invented that used ammonia and Sulphur dioxide as a cooling mechanism.
Freezers
Freezer units are widely used in households, and almost every industry and commerce. The main reason for using freezers is preservation. Food that is stored below -18 degrees Celsius can be used indefinitely and is preserved without a time limit. Most freezers that are used in houses maintain a temperature between -23 to -18 Degrees Celsius. However, normal household refrigerators cannot cool below -23 degrees. For cooling below this temperature, the industrial freezers are used that are very big and have a totally different mechanism and much more cooling capacity and storage. Domestic freezers can either be a part of refrigerators. Usually, a small freezer is located on top of the cooling unit of the refrigerator. The reason that compartment is not used for heavy use is that it is small, and the cooling unit of both refrigerators and the freezer is the same, which makes it vulnerable and fragile. However, small frozen goods that are used in our household daily can be preserved in that compartment like samosas, rolls, or chicken. Domestic freezers are also sold as different units that can either be ‘’upright units’’ resembling that of a refrigerator or as chests (which have a lid door on top), and the chest-like units are what we call, deep freezers. Many deep freezers come with an ice dispenser unit built into their door.
The upscale models also have a thermostat for temperature control and a display that can be analog or digital that shows the inner temperature of the freezer.
Mechanism
The necessary freezer works on the fundamental scientific principles of condensation, compression, and evaporation. The condensation of gases gives off a cooling effect. The inside of a freezer is made up of copper and steel pipes that contain a refrigerant gas. The refrigerant gas may be R-22 or R-134a. R-134a is the most commonly used cooling gas in the world of refrigeration. Another main component is a compressor that is actually a high-pressure pump, which is clear from its name, compresses gases, and the compressing effect of gases is responsible for the cooling mechanism of a freezer. The compressor has an electric motor that helps in the compression of gases.
Famous Companies
The famous companies that are involved in the production of freezers in Pakistan are PEL, Dawlance, Trip-Let, Haier, and Kenwood.
Key Features
- Automatic Defrosting
- Power Failure warning
- Chilled Water and ice dispensing cabinet in the door
- Cabinet Rollers
- Adjustable Shelves and Trays
- Status Indicator
- Drop Down door for better insulation
- Fast freeze or swift freeze function
Final Verdict
The deep freezer is thus an essential piece of technology that has evolved during the course of time, and now It has become an essential part of every household.