How to repair a refrigerator: finding the cause of the breakdown + repair methods
Household appliances make life much easier for every busy person, but, unfortunately, they sometimes fail. And refrigerators are no exception. At one not at all wonderful moment, the tried and tested “white friend” suddenly breaks down.
Well, if he has already served his. But if the service life is still far from completion, the best way out is to contact certified refrigeration masters with experience in repairing units. However, in some cases, you can do it yourself.
Classification according to the principle of action
It may seem to an inexperienced user that all refrigeration units are arranged in approximately the same way. However, this is not the case. According to the principle of operation, three types of household refrigerators are distinguished at once.
Before you start repairing your equipment, you need to know exactly how the refrigerator works. So let's take a closer look at each of these types.
The principle of operation of compression refrigerators
In this case, a special liquid is used to cool the chambers of the unit, which, under certain conditions, is capable of changing from liquid to gaseous form and vice versa at room temperature.
This is the so-called refrigerant. It is pumped into a closed circuit, moving along which it performs the cooling process. It happens in the following way. First, the liquid refrigerant is injected under pressure into the evaporator.
It is shaped like a coil so that the cooling process runs as efficiently as possible. The nozzle through which the refrigerant is supplied is called a spinneret.
In household equipment, it is a small fragment of a non-profiled capillary tube. In industrial models where high performance is required, profiled dies are used.
After the refrigerant enters the evaporator, it begins to expand rapidly, turning into a gas. It takes a certain amount of heat from the air, which corresponds to its heat of vaporization. In this way, the temperature in a well-insulated refrigerator or freezer is lowered and everything inside is cooled.
The normal evaporation process will continue only as long as the pressure inside the evaporator does not increase. For this reason, the compressor continuously pumps out refrigerant vapor and supplies it to the radiator.
This is another coil, inside which the gaseous refrigerant turns into a liquid. At the same time, it releases heat into the air. Next, the liquid is fed into the spinneret and the cycle is repeated. What can be attributed to the advantages of such a design? First of all, this is an efficiency approaching 100%.
In addition, compression equipment is economical, efficient and easy to adjust. Absolutely safe and chemically neutral compositions are used as a refrigerant in such units. The main disadvantage is the presence of detachable connections, moving and rubbing parts.
In addition, the refrigeration circuit has mechanical connections with the external environment, which requires high-quality seals.