A refrigerator is a popular household appliance with a thermally insulated compartment and a heat pump that transports the heat from the inside of the refrigerator to the outside environment so that the temperature inside the refrigerator is lower than the ambient temperature.
Today a refrigerator is used to store food in almost every country in the world, it reduces the reproduction rate of bacteria because they cannot multiply at low temperatures.
The temperature in the refrigerator is kept just above freezing, with a temperature between 3 and 5 degrees (37 to 41 degrees Fahrenheit) to keep the food fresh.
Every machine whose temperature is below freezing is called a freezer.
Even before the refrigerator, a machine called a chiller was used to cool, but it has been replaced by the refrigerator.
Refrigerator Parts – Top of Refrigerator:
The refrigerator consists of very important components that function as follows in the cooling process:
Expansion valve :
It is also called a flow control device.
The expansion valve is used to control the flow of liquid refrigerant to the evaporator.
We also know a liquid refrigerant called coolant.
The expansion valve is a very small and very sensitive device.
This makes it easy to change the temperature of the refrigerant.
The compressor consists of an engine that sucks the refrigerant out of the evaporator and compresses it, creating a hot, high-pressure gas in the cylinder.
This is the most important part that actually cools things that are stored in the refrigerator, it has finned tubes.
They are made of metals with a very high thermal conductivity, thus increasing heat dissipation.
It absorbs the heat from the coil when the fan strikes.
In this way, the evaporator absorbs the heat of the substance in the refrigerator and this heat converts the liquid refrigerant into a vapor.
The condenser is an accessory located above the refrigerator:
The capacitor is mounted on the back of the fridge, which looks like gauze.
These are tubes that consist of a capacitor coil with the fins facing outwards.
It absorbs the heat of the refrigerant gas and releases it into the atmosphere, contributing to the liquefaction of the refrigerant gas.
When the heat is removed from the refrigerant, its temperature drops and condenses to a certain temperature, and then turns into steam.
We also know the name of the refrigerant, which is the fluid that keeps the cooling cycle going continuously.
It is a specially formulated chemical that specializes in changing the state of hot gases and cold liquids.
About 20. In the 20th century, hydrofluorocarbons, especially CFCs, were used as refrigerants.
Chronologically, however, the refrigerant has taken the form of ammonia, R-290, R-600A, etc., which is the most common form of refrigerant.
Advantages of a refrigerator:
- We can keep the food in the fridge for a long time and keep it free of germs.
- Some foods deteriorate rapidly due to the outdoor environment, we can also keep them in the refrigerator and use them after a few days.
- Even if the food is not taken outside, it can get stuck in a swamp of insects, but even in the refrigerator, the food is protected against insects.
- We keep drinking water, cold drinks, without refrigeration, there is no reason to drink, and in that sense, it is also very useful for us.
Disadvantages of the refrigerator:
- We have to run the fridge 24 hours a day, 7 days a week and that costs a lot of electricity.
Conclusion for the refrigerator kit:
Although we use the fridge every day, we don’t pay much attention to it. We remember that especially during the summer season because we need cold water and a cool drink.