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Are Blast Freezers useful?

blast freezerA blast freezer is a type of freezer which is designed to speed up the freezing of food in the food industry. This is because the current legislations regarding food safety standards state that food must be cooled from the Danger Zone temperature to a safer temperature (below 8 degrees Celsius) in as little time as possible.

The Danger Zone temperature is between +8 degrees and +68 degrees Celsius, and is the temperature at which bacteria can reproduce fastest. By cooling food to below this temperature as quickly as possible, you can prevent the potential spread of bacteria over your food.

The Department of Health Guidelines in the UK say that in order for the food to be safely frozen, the food must be cooled from a temperature of +70 degrees to -18 degrees Celsius in less than 240 minutes (4 hours). Whereas a Blast Freezer is capable of doing this, most standard and conventional freezers are not, which is why if you are supplying food as part of your business, you’ll need to make sure you’ve got some blast freezers to keep your food safe to eat for the consumer.

What are the functions of blast freezers?

A blast freezer will generally have two main functions. The first function takes effect the moment you put food into the freezer. This is the blast chilling phase. The blast freezer will have powerful fans inside which will blow cold air laterally over the food, to remove any thermal energy (heat) that is in the food. Once this is complete, the blast freezer will switch to a holding mode, which will keep the food at a set temperature and prevent it from warming.

Blast freezers can come in many sizes, from models which are small enough to fit in a kitchen (the size of a standard conventional freezer), to huge models which are over 40ft long. The size of the freezer you use will be dependent on the amount of food that passing through your business that needs freezing.

The smaller models which are designed for inside a building are very much like a conventional freezer- with one door at the front, a few shelves inside, and a freezing time of several minutes. The larger, container sized models are a lot more complicated, due to their extra safety measures (such as non-slip floors, alarms and interior lighting) because they’re big enough for people to walk inside.

Thinking of getting a blast freezer?

If you are interested in obtaining a Blast Freezer, CRS Cold Storage in Ireland are capable of providing freezing and cooling products for industrial use.

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