Modern refrigerators have ceased to be just freezers, turning into complex climatic complexes for preserving the freshness of products. One of the most talked about features in premium models is the active oxygentechnology, often labeled as Active Oxygen or Air Wash. This system is designed to fight bacteria and foreign odors at the molecular level, which fundamentally distinguishes it from simple carbon filters.
Many users come across this term when choosing a new technique, but do not fully understand the physical principle of operation. Active oxygen is not magic, but the result of physical and chemical processes to extend the shelf life of vegetables, fruits and meat. In this article, we will analyze in detail how exactly this technology works, whether it is worth overpaying for it and what real advantages it provides in everyday life.
Understanding the principles of operation of the internal systems of a refrigerator helps not only to operate the equipment correctly, but also to avoid common mistakes. Ozonation and the generation of ions requires certain conditions for effective work. Next, we will look at technical nuances that are hidden from the user’s eyes, but directly affect the quality of storage of your products.
The principle of operation of the active oxygen system
The technology is based on the process of generating ozone (O3) or negatively charged ions directly inside the refrigeration chamber. A special module, usually located on the back wall or at the top of the unit, converts oxygen molecules from the air. The resulting substance has powerful oxidizing properties, which allows it to destroy the cell walls of bacteria and viruses.
The process occurs cyclically and automatically. When you close the door, sensors detect the lack of movement and the system starts a short cleaning cycle. Active particles fill the internal volume, neutralizing ethylene, which is released by ripening fruits, and destroying sources of unpleasant aromas. After the cycle is completed, ozone quickly disintegrates back into ordinary oxygen, leaving no traces.
⚠️ Attention: The concentration of ozone in household refrigerators is strictly regulated and safe for humans when the doors are open, but it is not recommended to inhale air directly from a running generator during the cleaning cycle.
The effectiveness of the method depends on the tightness of the chamber and the serviceability of the seals. If the system Active Oxygen works correctly, you should not notice a strong ozone odor when opening the refrigerator. The technology is aimed at creating a sterile environment where decay processes slow down significantly compared to normal conditions.
Technical detail
How is ozone created?: A ceramic emitter is installed inside the module, which supplies high voltage to a special grid. The air passing through it is subjected to an electrical discharge, as a result of which some of the O2 molecules are converted into O3. This process is similar to what happens in the atmosphere during a thunderstorm, but on a controlled microscopic scale.
Differences from carbon filters and plasma clusters
On the household appliances market you can find many names for cleaning systems: Deo Fresh, Plasmacluster, carbon filters. It is important to understand the difference, since the mechanisms of influence on the environment are fundamentally different. Carbon filters work on the principle of adsorption - they simply absorb odor molecules from the air passing through them, but do not destroy bacteria.
Systems based on active oxygen act aggressively and actively. They do not wait until the air passes through the filter, but spread throughout the entire chamber. Plasma clusters, in turn, often use a bunch of positive and negative ions, which attach to the surface of products and create a protective barrier that inhibits mold growth.
For a visual comparison, consider the main characteristics of different technologies in the table below:
| System type | Principle of operation | Effect against bacteria | Replacement of consumables |
|---|---|---|---|
| Carbon filter | Adsorption of odors | None | Every 6-12 months |
| Active oxygen | Oxidation and destruction | High (up to 99%) | Not required |
| Ionizer | Particle charging | Medium | Rarely (cleaning needles) |
| Silver coating | Contact antibacterial | Low/Medium | No (coating walls) |
When choosing between models, it is worth considering that active oxygen does not require cartridge replacement, which saves the budget in the long run. However, such systems consume slightly more electricity from the generator. Carbon filters are cheaper to buy, but require regular maintenance, which users often forget about.
Impact on shelf life products
The main task of any refrigerator is to keep food fresh for as long as possible. Active oxygen technology does this brilliantly, especially with plant foods. During storage, vegetables and fruits emit gas ethylene, which accelerates their ripening and subsequent rotting. Active oxygen particles destroy ethylene molecules, slowing down biological processes.
Meat and fish products also benefit from such processing. Bacteria that cause protein spoilage die in an ozone-rich environment. This means that you can store opened or semi-finished products for several days longer without the risk of a slippery coating or unpleasant odor. Freshness is preserved not only visually, but also at the taste level.
However, it is worth remembering that technology is not omnipotent. If you place already spoiled food with obvious signs of mold in the chamber, the system will help slow the spread of spores, but will not restore the quality of the food. Regular inspection of the contents of the refrigerator is still necessary.
Elimination of foreign odors
One of the most annoying problems when operating a refrigerator is the mixing of odors. The aroma of smoked fish can instantly permeate butter or berries. The active oxygen system solves this problem by breaking down volatile organic compounds, which are the carriers of odor.
Unlike deodorants, which mask unpleasant odors with their fragrance, ozonation eliminates the cause itself. Ozone molecules react with odor molecules, turning them into harmless, odorless substances. This is especially true after defrosting or purchasing products with a strong odor.
The deodorization process occurs continuously or on a timer. Even if you accidentally spilled milk and didn’t notice it right away, the active system will help minimize the consequences by preventing the smell from being absorbed into the plastic elements of the chamber’s interior. This greatly simplifies the maintenance of equipment.
⚠️ Warning: Do not attempt to use additional fragrances or air fresheners inside a refrigerator with an Active Oxygen system. Chemical components of sprays can react with ozone or damage the system sensors.
Energy consumption and system resource
Users are often concerned about the issue of additional energy consumption. An active oxygen generator is a low-power device that consumes negligible energy compared to a compressor. Turning on the system adds less than 1-2 kWh to the annual consumption of the refrigerator, which practically does not affect electricity bills.
The service life of such modules is designed for the entire service life of the refrigerator. There are no mechanical parts that wear out quickly. The only thing that may require attention is cleaning the inlet holes from dust, if the model allows for such user service. In most cases, the system is completely autonomous.
It is worth noting that in some models the function can be disabled via the control panel if you plan to store products that do not require a sterile environment, or if you are sensitive to the slightest changes in the composition of the air. However, manufacturers recommend keeping the system turned on constantly to maintain an optimal microclimate.
☑️ Checking the system operation
Nuances of operation and safety
Despite its high efficiency, the active oxygen system requires the right approach. Because ozone is a strong oxidizing agent, it can attack some rubbers and plastics at very high concentrations, but in domestic refrigerators the levels are strictly controlled and safe for chamber materials.
It is important to monitor the condition of the door seals. If the rubber does not fit tightly, the active gas will evaporate outside, reducing the cleaning efficiency inside, although this does not pose a danger to humans in such small doses. Tightness is a key factor in the successful operation of any air purification system in a confined space.
It is also worth considering that some delicate products, such as live yogurt cultures or certain types of blue cheese (such as Camembert) could theoretically respond to increased ozone levels. Although practice shows that there are no negative effects in short-term storage, connoisseurs of specific tastes may prefer to disable the function for individual storage zones.
Frequently asked questions (FAQ)
Is the presence of ozone in the refrigerator safe for food?
Yes, absolutely safe. The ozone concentration in household refrigerators is so low (less than 0.05 ppm) that it does not affect the taste of food and is completely safe for humans. Ozone quickly breaks down into ordinary oxygen.
Is it necessary to change the filter in the active oxygen system?
No, consumables are not provided in active oxygen generation (ozonation) systems. The module runs on electricity. If your refrigerator has a Deo Fresh carbon filter installed, it needs to be changed every 6-12 months.
Why is there a strange smell after opening the refrigerator?
A slight specific smell may be a consequence of the ionizer or a residual ozone reaction. If the smell is strong and unpleasant, check for spoiled food, as the system may not be able to cope with the volume of gases emitted.
Is it possible to disable the Active Oxygen function?
In most modern models, this function can be turned on or off through the settings menu on the display or through an application on a smartphone. However, by default it is activated to maximize freshness.
Does active oxygen kill bacteria on the surface of products?
Yes, the gas penetrates hard-to-reach places and treats the surface of products from all sides, destroying up to 99% of bacteria and mold spores, which significantly reduces the risk of spoilage.