We all know that
freezers were invented in order to freeze food. It may sound very simple, but
the technology and history behind this special appliance is definitely not as
simple as it seems.
The invention of freezer
Electronic
freezers have greatly improved since its invention in the year 1945. Freezers,
at first, were not as convenient to use. Various freezer features like
automatic defrosting, energy efficiency, thermostat and others have undergone
improvements to make it perform better and more effectively.
In the early
years of its invention, freezers were not first advisable to be used
domestically because they were deemed unsafe. However, they were improved and
later on mass produced after the Second World War.
To fully
understand how a freezer works, let us first take a look at its basic
components.
Components of a
freezer
Every freezer
has the following: compressor, condenser, metering device and evaporator.
All these factors collaborate in order to retain the needed temperature (usually
between -23 degrees to -18 degrees Celsius) and freeze food. The temperature
that some freezers can maintain may still vary depending on the unit type and
its capacity.
Modern freezers
Freezers are
used for various purposes. They could be used for commerce, or they can also be
used as a domestic appliance. Freezers used domestically fall between two
types: upright models and chest models. Upright freezers look similar to our
refrigerators, whereas chest freezers are like upright units that are laid on
their backs.
There are many
sophisticated upright units today that come with special features such as
built-in ice dispenser, classy interior lights, special thermostat displays and
controls, and some even have flat television screens. All these features made
modern freezers easier to use and maintain.
Basically, freezers
are necessary technologies made to preserve food by preventing bacteria from
forming through freezing. Today, many different types of freezers are available
in the market to cater to different needs and purposes. These kinds of freezers
have been developed over the years to better cope with the changing needs of
the people.
