In modern offices and residential premises, water coolers have become an integral attribute of comfort, providing access to cooled or heated liquid at any time. However, few people think about what complex physical process is hidden behind pressing the “cold water” button. Understanding how a cooler refrigerator works will help not only choose the right model, but also properly operate the device, extending its service life.
The main task of the internal cooling module is to lower the temperature of the water in the tank to the specified values, usually from +5 to +10 degrees Celsius. Depending on the type of cooling system installed, this process can occur at different speeds and energy efficiency. There are two main types of systems: compressorworking on the principle of a conventional household refrigerator, and thermoelectricusing the Peltier effect.
It is important to note that regardless of the type systems, the operating principle is always tied to heat removal from the internal tank. Intelligent control systems monitor the water temperature and automatically turn the cooler on or off to maintain the set parameters. This ensures the stability of water supply at the required temperature without constant consumption of electricity at full power.
The principle of operation of a compressor cooling system
Compressor coolers are the most efficient and are often found in places with high water consumption. The principle of their operation is completely identical to the operation of a conventional kitchen refrigerator. The main working fluid here is the refrigerant (freon), which circulates in a closed circuit, changing its state of aggregation.
The process begins by compressing the gaseous refrigerant, increasing its pressure and temperature. Next, the hot gas enters the condenser (radiator), where, releasing heat to the environment, it turns into liquid. After passing through the capillary tube or throttle, the pressure drops sharply and the refrigerant enters the evaporator. compressor compresses the refrigerant gas, increasing its pressure and temperature. Next, the hot gas enters the condenser (radiator), where, releasing heat to the environment, it turns into liquid. After passing through the capillary tube or throttle, the pressure drops sharply and the refrigerant enters the evaporator.
It is in the evaporatorwhich usually surrounds the water tank or is built into it that the key moment occurs: the liquid refrigerant boils at low pressure, actively absorbing heat from the water. Once converted back to gas, the refrigerant is returned to the compressor and the cycle repeats. This system allows you to cool large volumes of water and even create ice reserves.
⚠️ Attention: Compressor models are sensitive to the position during transportation. If the cooler was transported lying down, before turning it on, it must be kept in an upright position for at least 4-6 hours so that the oil flows into the compressor crankcase.
Why is the compressor humming?
The operation of the compressor is accompanied by vibration and sound, since mechanical compression of the gas occurs inside. This is a normal phenomenon, however, modern models are equipped with noise insulation to reduce the level of the discomffer.
Features of thermoelectric cooling (Peltier)
Coolers equipped with thermoelectric modules are quieter and more compact. Their work is based on Peltier effectdiscovered in the 19th century. The essence of the phenomenon is that when an electric current passes through the contact of two dissimilar conductors, heat transfer occurs: one side of the plate is cooled, and the other is heated.
There is a plate installed inside the cooler, one side of which fits tightly to the water tank, taking away heat from it. The reverse, hot side must be effectively cooled, otherwise the process will not proceed. For this, fans and radiators are used, which blow heated air out through special grilles.
The main advantage of such systems is the absence of moving parts (except for the fan) and refrigerant, which makes them practically silent and environmentally friendly. However performance thermoelectric modules are lower than those of compressors. They cannot cool the water to an icy state and depend on the ambient temperature.
Comparison table of cooling systems
To better understand which type of cooling is right for you, it’s worth considering the key differences in characteristics. The choice between a compressor and a Peltier element is often dictated by the volume of consumption and the requirements for water temperature.
| Characteristics | Compressor system | Thermoelectric system |
|---|---|---|
| Operation principle | Refrigerant circulation | Peltier effect |
| Noise level | Medium (humming, clicking) | Low (fan only) |
| Min. water temperature | up to +4°C | up to +10-12°C |
| Productivity | High (up to 2-3 l/hour) | Low (up to 0.5-0.7 l/hour) |
| Weight and dimensions | Large and heavy | Compact and light |
As can be seen from the table, for an office with a large team, where water is consumed quickly, the compressor model will be the only choice. For a small room or bedroom where silence is important and water is needed periodically, thermoelectrics will be a more reasonable solution.
Temperature control system and thermoregulation
The key element that ensures stable operation is a thermostat or an electronic temperature sensor. This device continuously takes readings from the surface of the tank or directly from the water. When the temperature reaches the lower threshold, the circuit opens and the cooler stops.
When the water heats above the set limit (hysteresis), the system starts the cooling process again. Modern models use digital controllerswhich allow the user to independently adjust the desired temperature through the control panel. This makes it possible to save energy by setting lower temperatures at night.
It is worth noting that incorrect operation of the thermostat can lead to two problems: the water will stop cooling altogether or, conversely, the cooler will work without stopping, which can lead to freezing of the water in the tank and damage to the system.
Typical malfunctions and their causes
Despite its reliability, the cooling system may fail. Most often, users are faced with the fact that the water is no longer cold. One common reason is contamination of the condenser (radiator) with dust, which interferes with heat transfer.
Other possible problems include:
- 🔇 Fan malfunction: if the blower fan does not work, hot air is not removed and the system overheats.
- ❄️ Refrigerant leak: in compressor models, this is a critical failure that requires calling a technician for refueling or repair.
- ⚡ Combustion of the thermoelement: in Peltier models, platinum can burn out due to a power surge or natural wear.
⚠️ Attention: If you notice that the back wall of the cooler (where the radiator is located) is very hot and the water is not cooling, turn off the device immediately. This is a sign of a heat transfer disorder or fan failure.
To prevent such situations, it is recommended to regularly clean cleaning the ventilation holes and radiators from dust. This is a simple procedure that significantly extends the life of the device.
Operation rules to extend service life
In order for the cooler refrigerator to work properly for many years, you must follow a number of simple operating rules. First of all, this concerns the installation of the bottle. The water should be changed only after the indicator shows an empty tank to avoid airing the system.
☑️ Monthly maintenance of the cooler
It is also important to ensure free circulation of air around the device. It is not recommended to move the cooler close to the wall or block the back panel with furniture. The distance to the wall should be at least 10-15 cm.
If you plan not to use the cooler for a long time (for example, you are going on vacation), it is better to drain the water from the tanks and unplug the device. This will prevent the development of bacteria and reduce the risk of contact oxidation. To defrost and completely clean the internal tanks from scale, it is recommended to use special products or citric acid, following the manufacturer's instructions.
Why does the cooler make gurgling sounds when cooling?
Gurgling is a normal physical process. When water cools, gases dissolved in it begin to be released. Sounds can also occur when refrigerant circulates in the tubes of the compressor system. If the sound is not accompanied by vibration or a burning smell, there is no need to worry.
Is it possible to install a cooler with a compressor on a heated floor?
It is highly not recommended to install any equipment with a cooling system on a heated floor. Heating the bottom of the device disrupts natural convection and the operation of the compressor, which leads to overheating and increased energy consumption. It is better to use a stand or choose a place without heating.
How often should you clean the cooling radiator?
The frequency of cleaning depends on the dustiness of the room. In standard office conditions, it is enough to carry out the procedure once every 6 months. If there is a lot of dust in the room or there are pets, the interval should be reduced to 3-4 months.