Besides keeping foods fresh, freezers and refrigerators serve several other functions. For example, they can be used to store fresh water, juice, and beverages. They can also be used to store perishable foods such as meat and dairy products. They can also be used for storing biological specimens, such as vaccines.
The freezer and refrigerator are both cooling appliances that work by using a refrigerant to absorb heat from the surrounding air and release it as excellent gas. They use an electric motor to power the refrigeration process. The refrigerant is then passed through coils to cool the refrigerator. The evaporator coils are usually located in the back of the freezer.
The temperature of a refrigerator is typically measured between 35 and 38 degrees Fahrenheit. Some refrigerators have a dial that gives numbers ranging from 1 to 5. The lower numbers represent the coldest temperatures and the highest numbers represent the warmest. These temperatures are typically ideal for the refrigerator compartment. However, there are also some refrigerators that require the refrigerator to be at a certain external temperature to run correctly.
The freezer is a separate unit that can be used separately or together with the refrigerator. The early freezer units were located within the refrigerator itself, and were accessed by opening the refrigerator door. Some of the early units also had an electrical heater wire that heated the walls for a brief period. These units became industry standards by the 1960s.
The freezer and refrigerator are typically made in different sizes. Depending on the size of the unit, it may be built into a kitchen or unfinished area. Some models have a drop down door to allow easy access to frequently used items. They are also available in a variety of colors. The early 1960s saw pastel colors become popular, and stainless steel became fashionable in the late 1990s.
The freezer is a smaller part of a refrigerator. The freezer portion is designed to hold frozen foods and dairy products, while the refrigerator portion is designed to keep food cool and fresh. Some side by side refrigerators and freezers have a double width refrigerator section, which makes it easier to store larger items.
Typically, the lower temperature of a freezer is necessary to prevent frost from forming. Lower temperatures also slow down the growth of bacteria. This is important for storing biological specimens. However, lower temperatures can also affect the quality of the foods in the freezer. This is especially true for root vegetables, which can deteriorate faster in a refrigerator.
Refrigerators are also designed to keep food fresher longer. The internal temperature of a refrigerator is controlled by a thermostat. The thermostat engages a cooling cycle when it determines that the refrigerator needs to cool. Some models also feature a cooling zone on the door shelves.
Some refrigerators also have a dual control, which allows them to be used as both a refrigerator and freezer. This is useful for boaters who wish to use the unit as both a refrigerator and freezer for short trips.