Internal structure of the household refrigeration equipment often remains a mystery to the average user until the equipment ceases to perform its functions. The main element that ensures the circulation of the refrigerant and the creation of the required pressure drop is capillary tube. In brand models Atlant this component plays a critical role, since the ability of the freezer and refrigeration chambers to maintain a given temperature depends on its condition.
This thin copper pipeline connects the condenser and evaporator, performing the function throttle. It is due to the narrowing of the channel that a sharp drop in freon pressure occurs before it enters the evaporator, which triggers the process of intense boiling and cooling. Understanding the operating principle of this unit will help you quickly diagnose a malfunction and understand why your Atlant stopped freezing or started working in increased mode.
There is a common misconception that a tube failure requires replacing the entire compressor, but this is not always the case. Often the problem lies in a banal blockage or mechanical damage that can be localized. The length of the capillary tube in single-compressor Atlant models is from 3 to 5 meters, rolled into a compact spiral. Let's figure out exactly how it works and what to do if the system fails.
Principle of operation and place in the cooling system
The capillary tube is a long copper coil with a very small internal diameter, usually less than one millimeter. In refrigerators Atlant it serves as the boundary between the high pressure zone (compressor discharge) and the low pressure zone (suction). Passing through this narrow channel, the liquid refrigerant is throttled, losing pressure and partially transforming into a vapor-liquid mixture.
After leaving the tube, the mixture enters the evaporator, where at low pressure it begins to actively boil, removing heat from the refrigerator chambers. This physical process is the foundation of the entire system. If capillary tube functions correctly, then at the exit from the evaporator the freon completely transforms into a gaseous state, which protects the compressor from water hammer.
However, if disturbances occur in the system, the cooling cycle is interrupted. For example, if the tube is clogged, freon simply cannot pass beyond the condenser, and cold production stops. It is important to note that modern models Atlant often use a dual-circuit system, where the tube can pass through the housing to prevent the formation of condensation outside, which complicates visual diagnostics.
Main signs of a malfunction of the capillary system
You can determine that the problem lies in the capillary pipeline by a number of characteristic symptoms. Most often, users notice that the refrigerator Atlant works almost non-stop, trying to gain temperature, but the food still spoils. The compressor hums continuously, since the sensors do not record the achievement of the specified parameters.
The second obvious sign is uneven cooling. The freezer can operate normally while the refrigerator compartment is at a warm temperature, or vice versa. This indicates that the circulation of the refrigerant is impaired and it does not reach the desired circuit in full.
It is also worth paying attention to the following details:
- 🧊 The absence of characteristic gurgling or hissing when the compressor is operating, which indicates a stop in the movement of freon.
- 🌡️ A noticeable temperature difference: the upper part of the evaporator is cold, and the lower part is warm, which indicates a blockage.
- 💧 The appearance of swelling on the tubes or oily spots in the soldering areas, indicating depressurization.
⚠️ Attention! If you notice swelling of the metal walls of the housing or tubes, under no circumstances try to pierce them with sharp objects. There may be gas under high pressure inside, which is dangerous to health.
Typical problems: blockages and leaks
The most common cause of system failure is a clogged capillary tube. This can happen for two main reasons: moisture entering the circuit or the presence of mechanical impurities. Moisture, combining with oil and freon, can form ice plugs in the narrowest place, blocking the flow of refrigerant.
Mechanical blockages arise due to oxidation of the inner walls of the tubes or poor-quality installation during previous repairs. Small copper shavings or oil breakdown products clog the section, and the pressure stops dropping at the desired point. As a result, Atlant refrigerator stops cooling, although the compressor continues to work.
Freon leaks are the second most common problem. Copper corrodes over time, especially in areas where it is soldered or in contact with aggressive environments. Microcracks lead to a gradual release of gas, and the system loses efficiency. In such cases, it is necessary not only to replace the tube, but also to find the location of the leak using a leak detector.
Diagnostics of the condition of the tube at home
Before calling a technician, you can carry out an initial diagnosis that will help you understand the scale of the problem. To do this, you will need to carefully examine the back wall of the refrigerator Atlant and listen to the sounds made by the unit. It is important to perform all actions carefully so as not to damage fragile elements.
First of all, check the uniformity of heating of the capacitor array. If the top is hot but the bottom remains cold, this is a sure sign that the freon is not circulating through the full cycle. Also touch the tube at the outlet of the compressor: if it is icy, moisture may have entered the system and an ice plug has formed.
For a more accurate check, you can use the following algorithm:
- 🔍 Inspect all visible connections for traces of oil, which often acts as an indicator of leakage.
- 👂 Place your ear against the back wall: the absence of sounds of liquid flowing indicates a blockage in the system.
- ⏱️ Note the operating time of the compressor: if it does not turn off for more than 20 minutes when the refrigerator is empty, this is an alarming signal.
⚠️ Attention! It is strictly forbidden to open a sealed circuit without special equipment and skills. An attempt to simply blow through the tube with your mouth may introduce moisture, which will completely damage the refrigerator.
Table of symptoms and probable causes
For the convenience of systematizing data on capillary system malfunctions, we will compile a summary table. It will help to compare the observed symptoms with the most likely technical reasons for the breakdown of your Atlanta.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Compressor hot, cold | Complete blockage of the capillary tube | Replacement of the tube, evacuation |
| Change in the sound of the motor | Lack of refrigerant (leakage) | Search for leaks, refill with freon |
| Periodic shutdowns | Ice plug in the tube | Replacing the filter drier, purging |
| Oil stains on semi | Mechanical damage to the circuit | Soldering of the damaged area |
Analyzing the table data, we can conclude that most problems require the intervention of a specialist with a set of tools. You can only diagnose the problem yourself, but to fix it you will need a pressure gauge station, a vacuum pump and a supply of refrigerant.
Why can’t you just replace the tube with a longer one?
Increasing the length of the capillary tube will lead to a change in the hydraulic resistance of the system. The compressor will not be able to push freon, the discharge pressure will increase to critical values, which will cause overheating and motor breakdown.
The process of replacing and repairing the system
Repairing the capillary system in refrigerators Atlant is a complex technological process that requires strict adherence to technology. The first step is always to dismantle the old tube and remove the filter drier. The old filter must be cut off, since it is disposable and contains an adsorbent that has absorbed moisture.
Next, a new tube is selected. It is important to use a copper tube of the same diameter and length as the original, or to be guided by the technical data for a specific model. After installing the new element, the system is sealed and vacuumed for 15-20 minutes to remove air and moisture.
The final step is to fill the refrigerator with freon. The amount of refrigerant must strictly correspond to the norm indicated on the unit label. An excess or lack of gas will lead to incorrect operation of the compressor and a lack of cold.
☑️ Stages of professional repair
Prevention and operating recommendations
So that the capillary tube is in your Atlanta served for a long time, it is important to follow the rules of operation of the refrigerator. The unit should not be overloaded with warm products, as this creates excess load on the system and can contribute to moisture condensation inside the circuit during sudden temperature changes.
Regular defrosting (for No Frost models - checking drainage) helps maintain optimal operation. It is also worth protecting the back wall of the refrigerator from mechanical damage and corrosion, especially if the unit is located in a room with high humidity.
Timely maintenance, including cleaning the condenser from dust, reduces the load on the compressor and the entire circulation system. A clean heat exchanger ensures effective heat removal, which has a positive effect on the durability of all components, including the thin capillary tube capillary tube.
Is it possible to clean the capillary tube without replacement?
In some cases, if the blockage is caused by mechanical particles, professionals may try to purge the system with high pressure nitrogen. However, if the cause is oxidation or moisture ingress, replacing the tube and filter drier is the only reliable solution.
How much does it cost to replace a capillary tube in Atlanta?
The cost is the sum of the price of materials (copper, freon, filter) and the complexity of the technician's work. Since the procedure requires expensive equipment for evacuation and charging, the cost of repair can be significant.
Why does the refrigerator freeze poorly after replacing the tube?
This may be due to incorrect selection of the length or diameter of the new tube, poor-quality evacuation (moisture residues) or an incorrect amount of refrigerant charged. Re-diagnosis of the system parameters is required.