Home refrigerator ... The secrets of dealing with bacteria

Home refrigerator ... The secrets of dealing with bacteria

The main objective of the refrigerator to prevent bacteria from activated in different nutrients, and adopt the basic idea of refrigerator simply to transform liquid into gas by absorbing heat from the cause in the coolness, and to clarify this concept let's you dear reader when you put water on your face on a hot day is then cooler due to the evaporation of water into steam through the absorption of heat from the skin, feel cold as you if you put some drops of alcohol on your hand and wait for 20-30 seconds it will be cooler in your hand when the region that it was alcohol and cold more than those caused by water because alcohol evaporation temperature less than water, the reason for this is that alcohol absorbs heat from your hand to evaporate and turn into gas.

If we conclude from this that the transition from the liquid state to the gaseous state you need to heat and the heat available through your hand and the result was a reduction in temperature of the hand if the transition from liquid to gas cooling continued.

The liquid or refrigerant coolant used in refrigerator evaporates at low temperatures causing freezing in the refrigerator if Seashell and you put the liquid in the fridge on your hand will freeze the skin during the evaporation of the liquid.

Refrigerator cycle

The refrigerator in continuous cooling of the internal content by repeating the process of transforming liquid into gas inside the freezer, take heat from inside the refrigerator and the result is cooling its contents and gas-to-liquid out of the fridge by pressure and heat dissipation to the outside of the refrigerator and repeat clients to pull heat from inside the refrigerator where low temperature relative to the outside of the freezer where the temperature is high in order to perform this function, the refrigerator with through cycle several stages are as follows:

(1) the motor Compressor to compress gas ammonia raising the temperature and pressure, so the heat exchange tubes allow foreign heat dissipation due to pressure.

(2) at this stage during heat loss to the outside environment through black pipes that are behind the fridge, the ammonia condenses in the remaining part of the heat exchange tubes and turns to liquid goes through the valve extensibility.

(3) the expansion valve separating two different pressure and when a liquid ammonia through thermal expansion valve it moves from high pressure to low pressure, stretch and liquid ammonia evaporates and turns into gas again by absorbing heat from the interior areas of the refrigerator and temperature drops.

(4) pass the ammonia through the heat exchange tubes and a bypass road to cover the largest possible area and given the opportunity to absorb the maximum amount of heat from inside the refrigerator to keep cool to be up ammonia to the motor press gas again and converts it to a liquid at points (B) and the process repeats.

Propane gas refrigerators

In cases where there are no source of power you can use propane fridge that does not work with electricity. This type of refrigerator has no moving parts and uses propane gas as a source of thermal energy produced by the cold. These refrigerators use ammonia as a refrigerant also used water cooling cycle, propane refrigerator parts consists of five parts:

Generator Generator to generate ammonia gas

Separator Separator to separate ammonia from water

Condenser Condenser for hot liquid ammonia

Evaporator Evaporator to vaporize the liquid ammonia and convert it into gas, resulting in cooler

The absorbent Absorber to absorb ammonia from water

The propane gas refrigerator cycle as follows:

(1) is the combustion of propane gas, heat generated inside the generator Generator.

(2) inside the generator component mixture of water and ammonia solution, the temperature of the solution within the birth as a result of the combustion of propane and temperatures to the boiling of ammonia.

(3) passes to the separator Separator where ammonia is separated from the water.

(4) the flow of ammonia after separated into up to intensive Condenser where consisting of thin sheets of metal to lose ammonia condensation temperature and turns to liquid.

(5) liquid ammonia evaporator Evaporator where it is mixed with hydrogen gas and evaporates, resulting in a decrease in the temperature inside the freezer.

(6) flow at this stage both ammonia and hydrogen to the absorbent absorber here mixed water with ammonia and hydrogen.

(7) the ammonia with water solution and hydrogen liberated and returns to the evaporator while flowing both ammonia and water to birth again in the same session.