While cryogenic freezers represent a low initial investment they have a.
Types of freezers used in food industry pdf.
To help decide which type of freezer to buy consider these features.
Place same type of foods in plastic large bags or cardboard boxes to keep together and be able to lift out to get to food at bottom of deep freeze.
Refrigerants are used in cars air conditioners and home appliances and most notably refrigerators and freezers.
Industrial freezers remove heat from the surface of a food as rapidly as possible.
Different types of food freezing technology.
Typically the refrigerant when used in a freezer is converted from liquid to gas and then back again.
You can choose the type that suits your requirements.
Modern air blast freezers use space efficient and energy efficient vertical air flow via prod uct lines.
Turn the freezer off.
These phase cycles allow it to cool the inside of the freezer keeping the space at the desired temperature.
Organize the food in the freezer into food groups so you can find them easily.
Place heavier items to the bottom of freezer.
This is what causes the food in a freezer to freeze.
In the past freezing food was as simple as surrounding it with a block of freshly carved ice to keep its core temperature lowered.
Freezers are useful and long lasting home appliances.
Portable freezers may use ac or dc power or both and some even come with cords that allow them to be powered through a car s cigarette lighter outlet.
How to defrost a freezer 1.
Cryogenic freezers use liquid nitrogen or liquid carbon dioxide as the refrigeration medium and the freezers may be batch cabinets straight belt freezers spiral conveyors or liquid immersion freezers.
Air blast tunnel or plate freezers are common within the food industry and offer several advantages to food producers including flexibility ease of operation and economy of operation for large pro duction volumes.
Chest freezers are also called reach in freezers.
As a rule of thumb you ll need 1 5 cubic feet of space per person.
Fricke in encyclopedia of food sciences and nutrition second edition 2003.
Freezing is a method of food preservation which has been used by humans for thousands of years.
The development of small portable freezers has made it possible to transport items in danger of spoiling without the mess and inconvenience of a cooler filled with ice.
The rate at which heat is removed from a food during freezing depends on how fast heat can travel within the food and how efficiently it can be liberated from the surface of the food into the surrounding atmosphere.
They are the most common types of freezers that are used commercially.
