Freezers:

As properly frozen foods contain a much longer storage life than cold-stored foods and also keep better quality, the emphasis is on the expansion of frozen- food storages and method of rapid freezing. Among the general products that are preserved by freezing are, meat, fish ,vegetables like sprouts, beans cauliflower ,carrots,  peas and spinach, several tissues and organs, etc.

Types of Freezer

There are three basic types of freezers which are following:

(1) Air-blast freezers in which cold air is flow over the product.

(2) Contact or plate freezers in which the product is brought in direct contact along a refrigerated surface.

(3) Spray or Immersion freezers in which the product is immersed in or sprayed along a liquid refrigerant.