A refrigerator, also names a fridge, is an amazing domestic device which is going to keep your food cool. Freezers, on the other hand will keep your food frozen allowing you to store it for quite a long period of time. Most of the freezers commonly sold today will work at a temperature of around minus eighteen degrees Celsius, or zero degrees Fahrenheit.
The idea behind those freezers is in reality quite straightforward. It works by using the evaporation of a liquid to absorb the heat. As the water evaporates, it absorbs the heat, creating the cool feeling in the device. The refrigerant in use in the device actually evaporates at a very low temperature allowing the freezing temperature to be created inside the freezer. The same principle would operate for freezer vans and new or used refrigerated vans.
Freezers are very often incorporated in the refrigerators used in many households as a simple compartment.
On top of being used by many households all around the world, they are also used for commercial reasons in the food industry. You will even find freezer vans, refrigerated vans and used refrigerated vans or chiller vans.
Commercial freezers were in fact in use for nearly forty years before there were used in many homes. Those commercial freezers would as a rule use gas systems containing toxic ammonia. The early machines actually accumulated ice crystals as a result of the humidity introduced when the door was opened, but the problem was quickly sorted out and the efficiency was improved.
You can even find now what is called an electric cooler. Those coolers actually do not use ice. You would just need to plug the device into your car's cigarette lighter and the appliance would produce a cool temperature electronically!
This phenomenon is called the Peltier effect. As it is a bit technical and difficult to explain, I will not talk about this principle as I am sure it would give a headache to most people, even me. The most important thing to know about that is that it works and produces cold.
At the beginning of the twentieth century, most of the American households in reality relied on putting their food in an icebox with melting ice to keep it cool, and by nineteen thirty, more than sixty percent of them had acquired a fridge. The same happened a bit later in other countries like the United Kingdom where those figures were hit in the seventies.
The author is working in the food industry and understands the need of chiller vans, freezer vans and used refrigerated vans
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