Thomson refrigerators are reliable units based on the classic principle of compression cycle, familiar from most household appliances. Understanding exactly how this mechanism functions helps owners use the device more efficiently and notice signs of possible malfunctions in time. Internal processes are based on the constant circulation of refrigerant, which takes heat from the chambers and releases it into the surrounding space.
Unlike simpler models, modern devices of this brand are often equipped with No Frost or Total No Frostsystems, which significantly changes the distribution of air flows inside the volume. Technology avoids the formation of an ice crust on products and walls, ensuring uniform cooling. It is a detailed analysis of each component that will allow you to gain a deeper understanding of the operation of your equipment.
The main engine of the entire process is the compressor, which creates the necessary pressure for the movement of freon through the pipes of the system. When you turn on the device for the first time, you hear a characteristic hum - it begins to work motor-compressor, starting a chain reaction of heat transfer. Without this component, creating low temperatures in domestic conditions would be impossible.
Basic operating principle of the compressor
The heart of any Thomson refrigerator is the compressor, which acts as a pump that distills the refrigerant in a closed circuit. When turned off, the pressure in the system is balanced, but as soon as power is applied, a piston or vibration platform begins to compress the freon gas. This compression process leads to a sharp increase in the temperature and pressure of the gas, which is then sent to the condenser.
It is important to understand that modern inverter models operate differently than older linear units. Inverter compressor does not turn off completely, but only reduces the speed, maintaining the set temperature with minimal energy consumption. This ensures silence and durability of the units, since there are no constant peak loads at start-up.
The circulation of the substance occurs due to the pressure difference created by mechanical compression. After passing through the condenser and capillary tube, where the pressure drops, the refrigerant boils at very low temperatures, drawing heat from the chambers. This physical principle underlies the operation of all refrigeration units, regardless of their brand.
Cooling system and air circulation
In models with support No Frost a special fan located in the freezer is responsible for the distribution of cold. It forces cold air through special channels into the refrigerator compartment, ensuring that the set parameters are quickly achieved. This forced circulation allows the temperature to equalize throughout the entire volume in a matter of minutes after loading the products.
However, the system has its own characteristics that the user should be aware of. The air in such refrigerators is very dry, so products that are not packaged in containers or film can quickly ventilate. Evaporator in such models it is hidden behind the back panel, and this is where moisture from the air freezes.
⚠️ Attention: Do not block the outlet openings of the air channels inside the chamber with products that otherwise the circulation will be disrupted and the compressor will work with overload.
Periodically, the system automatically goes into defrost mode when the compressor turns off and the heating element turns on. The melt water flows into a special pan located above the motor, where it safely evaporates. This cycle is fully automatic and does not require human intervention.
Why is the fan humming?
If you hear extraneous noise or humming, this may mean that the fan blades are touching frozen ice or a foreign object. Sometimes the problem is solved by completely defrosting the refrigerator within 24 hours.
The role of the thermostat and electronics
The thermostat or, in more modern models, an electronic control module with sensors is responsible for maintaining a stable temperature. Mechanical thermostat is a simple device that opens the electrical circuit when a certain temperature is reached, stopping the compressor. Electronics reads readings with an accuracy of a degree and controls the operation of all systems.
Thomson refrigerators often use a capillary tube, which responds to the expansion and compression of the gas inside the bellows. When the temperature in the chamber rises above the set one, the contacts close and the cooling cycle starts again. Setting accuracy directly affects the safety of food and energy consumption.
Inside the freezer
| Component | Function | Location |
|---|---|---|
| Thermostat | Turning the compressor on/off | Inside the chamber or on the body |
| Defrost sensor | Evaporator temperature control | On the evaporator (behind the panel) |
| Defrost heating element | Ice melting on the evaporator | |
| Timer/Board | Operating cycle management | Back bottom or top |
If you notice that the refrigerator has started working without interruption or, conversely, turns on too often, the problem may lie in the sensors. Incorrect readings lead to the fact that operation algorithm it gets lost, and the equipment cannot return to normal mode.
Design of the freezer compartment
The freezer compartment in Thomson units can be located both below and above, which affects the length of the refrigeration circuit. The interior space is usually divided into shelves and drawers made of plastic that is resistant to low temperatures. The tightness of the door is ensured by a magnetic seal, which must fit tightly around the entire perimeter.
Frozen food occurs due to intensive heat extraction through the walls of the evaporator. In models with Low Frost or similar systems, ice forms more slowly, but still requires periodic manual defrosting. The design of the drawers provides gaps for the circulation of cold air even when closed.
Particular attention should be paid to the water drainage system. If the drainage hole becomes clogged with crumbs or ice, water will pool at the bottom of the chamber or leak out. Regularly checking the cleanliness of the channels is the key to a long service life of the device.
Refrigerant and refrigeration circuit
The working fluid in Thomson refrigerators is ozone-friendly freon, most often R600a (isobutane). This gas has excellent refrigeration properties, but is flammable, which requires special care during repairs. The circuit is a closed system of copper tubes of different diameters.
Freon moves according to the following scheme: compressor → condenser → filter drier → capillary tube → evaporator. In the condenser, which is a grille on the back wall or hidden in the sides, the gas releases heat into the room. Filter drier retains excess moisture and microparticles, preventing clogging of the thin capillary tube.
⚠️ Attention: Self-puncture of the tubes or breaking the tightness of the circuit is strictly prohibited due to the risk of fire of R600a gas and failure of the equipment.
The capillary tube serves as a choke, sharply reducing the pressure of the refrigerant before it enters the evaporator. It is at this moment that boiling and heat absorption occurs. Any gas leak leads to a complete loss of cooling capacity and the system stops working.
Energy efficiency and sound insulation
Modern Thomson models belong to energy consumption classes A+ and higher, which is achieved through improved thermal insulation and efficient compressors. The body is filled with polyurethane foam insulation, which prevents the penetration of heat from the outside. The thicker the insulation layer, the less often the motor turns on.
The noise level depends on the type of compressor and the quality of the installation. Vibrations can be transmitted to the floor or walls if the device is not level. Adjustable supports allow you to set the horizontal position, which reduces the hum to a minimum.
☑️ Energy efficiency check
The location of the refrigerator also affects noise. If it stands close to a wall or furniture, heat exchange is disrupted and the compressor works more intensely. Compliance with the clearances specified in the instructions is critical for quiet operation.
Typical symptoms of malfunctions
Understanding the operating principle helps to quickly diagnose problems. For example, if the compressor runs constantly but there is no cold, most likely there is a freon leak or a clogged capillary. If the motor does not start at all, but the light inside is on, the problem may be in the start relay or the compressor itself.
The formation of a large “coat” of ice in the No Frost chamber indicates a malfunction of the defrost system. This could be a burnt heating element, timer or sensor. Diagnostics requires testing the circuits with a multimeter and checking the resistance of the elements.
In some cases, the problem lies not in the mechanics, but in the electronics. Failures in the control board can lead to chaotic systems turning on. Rebooting the device sometimes helps clear the error, but if the problem persists, the module needs to be replaced.
Why does a Thomson refrigerator make gurgling sounds?
Gurgling and overflowing of liquid inside the case is a normal physical process of refrigerant moving through the tubes. This is especially audible immediately after the compressor is turned off or at startup. If the sound is not accompanied by vibration or knocking, there is nothing to worry about.
How often do you need to defrost a refrigerator with No Frost?
Technically, the No Frost system does not require defrosting to remove ice, as it does it automatically. However, it is recommended to carry out sanitary defrosting and washing 1-2 times a year to remove bacteria and odors, as well as to check the condition of the seals.
Is it possible to install a Thomson refrigerator near a radiator?
It is strictly not recommended. The proximity of heating devices disrupts the heat exchange of the condenser, forcing the compressor to work at its limit. The minimum distance should be at least 50-60 cm.
What to do if the back wall of the refrigerator is hot?
Heating the back wall or side panels is the normal operating mode of the condenser, which releases heat taken from the products. Temperatures can reach 50-60 degrees. You should worry if the plug or power cord gets hot.