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The Purpose of Refrigeration. The fundamental reason for having a refrigerator is to keep food cold. Cold temperatures help food stay fresh longer. The basic idea behind refrigeration is to slow down the activity of bacteria (which all food contains) so that it takes longer for the bacteria to spoil the food.

The compressor constricts the refrigerant vapor, raising its pressure, and pushes it into the coils on the outside of the refrigerator. When the hot gas in the coils meets the cooler air temperature of the kitchen, it becomes a liquid. ... The refrigerant absorbs the heat inside the fridge, cooling down the air.

The main components of a refrigeration system are the condenser, the compressor, the evaporator and the expansion valve.

  • Condenser. Condensation changes gas to a liquid form
  • Compressor
  • Evaporator
  • Expansion Valve

The refrigerator compressor is both a motor and a pump that move the refrigerant through the system. ... The compressor pushes out the hot, compressed gas through the outside metal coils (tubes) on the back or bottom of the refrigerator. These coils allow the heat to dissipate into the surrounding

In systems involving heat transfer, a condenser is a device or unit used to condense a gaseous substance into a liquid state through cooling. ... For example, a refrigerator uses a condenser to get rid of heat extracted from the interior of the unit to the outside air.

Evaporator: This is the part of the refrigeration system that is doing the actual cooling. Because its function is to absorb heat into the refrigeration system (from where you don't want it), the evaporator is placed in the area to be cooled. ... The refrigerant vaporizes from the heat it absorbs heat in the evaporator.

A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in refrigeration and air conditioning systems that controls the amount of refrigerant released into the evaporator thereby keeping superheat, that is, the difference between the current refrigerant ...