CHEST FREEZER | aajjo.com

CHEST FREEZER

CHEST FREEZER

In India, food grains, fruit, vegetables, meat, poultry and fish, are very susceptible to microbial contamination and spoilage and require stringent preservation methods. One such preservation method is the use of a chest freezer for the storage of frozen food. Chest Freezers are the most economical freezer. It is named thus because of it's shape like a large box or chest with a hinged lid that opens upward. Because of this lid, a chest freezer requires enough space with plenty of headroom. 

A chest freezer is nothing different but a storage unit for frozen food, such as: meat, poultry, fish, prawns, some vegetables and some fruits. The components of a chest-type freezer : 

1. Polyurethane foam insulation

2. Wrap-around steel cabinet

3. Baked-on enamel end

4. Self-adjusting lid

5. Spring-loaded hinges

6. Vinyl lid seal

7. Safety lock and key

8. Wire baskets

9. Temperature-control knob

10. Automatic interior light

11.   Power-on lightweight

12. Vertical cabinet divider

13. Defrost water drain

14. Sealed compressor, and

15. Wrap-around condenser.

There is very little air modification once the cupboard opened. To make chest-type freezers more convenient to use, they are sometimes fitted with baskets that perhaps raised bent give access to food product packages close to the bottom. The lids usually have a counterbalancing mechanism, which makes them easy to open. The chest freezer provides the foremost economical variety of food physical change mechanism. Chest-type freezers require amanual defrost.Defrosting may be accomplished best by unplugging the condensing unit. Then remove the stored food and place either an electric space heater or a pail or two of hot water in the cabinet. With the cabinet closed, theice can shortly drop water from the evaporator surface and can be straightforward to get rid of. These freezers have a drain, which makes removing the wetness from the cupboard quite straightforward. Remaining moisture must be cleaned out of the cabinet. Cabinets are available in various capacities. Height and width are quite uniform. However, the capacity of the freezer will vary the length. The chest freezer provides the most economical food freezing mechanism. Chest freezers range in size from compact models as small as 2.1 cubic feet to commercial sizes with more than 40 cubic feet of space. It is most commonly found in the garage, utility room, or basement of a house, since it tends to be such a large appliance. The large, boxy dimensions of the chest freezer are ideal for storing bulky items that do not typically fit well into the freezer section of a refrigerator.

Chest freezers doesn't have any fan, which limits the air circulation and thus causes the temperature to be inconsistent, although as long as it can maintain a temperature below freezing, it will not affect the foods negatively. Since warmer air rises and cold air lowers, people usually store meats and other larger items in the lower parts of the freezer so that they will freeze solidly and stay preserved for several months. Smaller items such as bags of frozen vegetables and pre-cooked meals can be stored in these for easy retrieval. Designing of an condenser coil, evaporator coil and capillary tube are investigated through the development of the storage periods in proper terms of steady state and cyclic performance, by which it optimizes the quantity of refrigerant charge, with strict adherence to the standards and requirement required for maintaining an internal temperature of -23 °C at 43 °C ambient. In the design of the refrigeration system for a freezer, rigid standards are maintained so that there is no need of compromising with the quality and flexibility of the system.  The system is designed for optimum efficiency with moderate costs level; efficient equipment design will result in energy savings, which reduces the proficient running costs. Removing if any dust particles or contaminants are present in the system can develop the performance of the total system. Placement of the chest freezer also plays a major role in reducing the load on the system.  If exposed to the higher temperatures, the capacity requirement and power requirement will me more. Future work requirement would be the fulfilled with the development of an even more energy efficient freezer for working at different ambient conditions and with alternative refrigerants, which is more economical and more feasible at worse breakdown conditions.


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