At the first During spring cleaning, many owners of modern refrigerators discover a strange plastic container in the upper part of the main chamber or on the inside of the door. Inside it is often a small sponge or granular material, the purpose of which is not obvious without reading the instructions. This element is not decorative and certainly does not serve for washing dishes, as some might think by analogy with kitchen utensils. In fact, this is an important part of the system, designed to solve one of the main problems of food storage - mixing odors. In the confined space of a refrigerator, the aromas of fish, spices, cheese and fruit can interact with each other, creating an unpleasant bouquet that permeates even packaged foods. It was to prevent this process that engineers introduced this module.
In fact, this is an important part of the system No Frost or Total No Frost, designed to solve one of the main problems of food storage - mixing of odors. In the confined space of a refrigerator, the aromas of fish, spices, cheese and fruit can interact with each other, creating an unpleasant bouquet that permeates even packaged foods. It was to prevent this process that engineers introduced this module.
Inside the plastic case there is hidden activated carbon or a special absorbent impregnated with an antibacterial composition. The air circulates through the chamber, passing through this filter, where molecules of odorous substances and some bacteria are retained. Understanding the operating principle of this unit will help you maintain ideal freshness of food and avoid the appearance of a musty smell, which is so difficult to remove from the plastic interior.
The principle of operation of the carbon filter and absorbent
The air purification mechanism in the refrigerator is based on the physical properties of adsorption. Activated carbon, which is most often used as a filler (sometimes in the form of a compressed sponge, sometimes in the form of granules), has a porous structure with a huge surface area. When the air flow created by the system fan No Frostpasses through the filter, odor molecules “stick” to the walls of these pores.
The efficiency of operation directly depends on the speed of air circulation and the condition of the filter element itself. If the sponge is completely saturated with contaminants, it stops working and may even begin to release accumulated aromas back into the chamber. Therefore, manufacturers recommend regularly checking the condition of the absorber.
⚠️ Attention: Some refrigerator models use replaceable liquid flavor cartridges rather than carbon. In such cases, the sponge serves only as an odor distributor, and not as an absorber. Always check the instructions for your model so as not to confuse the type of filtration.
It is important to note that this element does not replace the need to store products in closed containers. It only reduces the intensity of mixing odors and slows down the growth of bacteria in the air. Antibacterial impregnation, which is often used to treat coal blocks, helps neutralize mold spores floating in the air, which is especially important for vegetables and fruits.
Where the odor absorber is located in different models
The location of the air purification module may vary significantly depending on the brand and series of the refrigerator. Engineers strive to place it in the area of the most active air flow to ensure maximum cleaning efficiency. Most often, users find this element in the upper part of the refrigerator compartment.
In refrigerators of the brand LG i Samsung the container is often built into the back wall or located on the ceiling of the chamber. It may look like a small grid or a removable cassette. In models Bosch i Siemens the absorber is sometimes hidden behind a decorative panel, which is easily removed without tools.
- 📍 On the ceiling: classic location for most models with the system Multi Air Flow.
- 📍 On the door: less common, but found in compact models where the container is built into an egg shelf or bottle holder.
- 📍 Inside the back panel: requires removal of the plastic cover for access, typical for premium series.
If you cannot find the sponge visually, try looking in operating instructions, where the diagrams always indicate the location of the serviced elements. Sometimes access to the filter is possible only after complete defrosting and removing the back wall, but this is rather an exception for older or specific models.
Service life and signs of the need for replacement
Like any filter element, the carbon sponge has a limited resource. Over time, the pores fill and the adsorption capacity drops to zero. Manufacturers of household appliances usually indicate a recommended replacement interval, which varies from 6 months to 1 year of active use.
It is possible to determine that the filter has exhausted its resource not only by the passage of time, but also by indirect signs. If you notice that the milk has begun to sour faster, and the smell of yesterday's soup is felt even after airing, most likely odor absorber requires replacement. Also, a sign of saturation can be a change in the color of the material itself, if it is visible through the transparent case.
| Type of filler | Average service life | Recoverability | Indicator replacement |
|---|---|---|---|
| Activated carbon (granules) | 6-12 months | No | Odor appearance |
| Compressed carbon sponge | 6 months | No | Color change |
| Antibacterial gel | 3-4 months | No | Gel drying |
| Silver coating (Nano Silver) | 2-3 years | Partially (washing) | No (permanent) |
Some modern models are equipped with electronic indicators on the display that remind the user of the need filter maintenance. If your equipment has a function Smart Diagnosis or a similar one, it may indicate that the air tract is dirty.
Is it possible to wash and reuse a sponge
The question of reusing a carbon filter arises among many equipment owners seeking to save money and be environmentally friendly. The answer depends on the type of filler. If there is an ordinary foam sponge soaked in a solution inside, washing it with water will wash away the active substances and it will become useless.
The situation with activated carbon is more complicated. Theoretically, coal can be regenerated by calcination at high temperatures, but this is impossible and dangerous to do at home. Washing with water will only remove surface dust, but will not free deep pores from heavy molecules of fat and odor. Moreover, wet carbon becomes an ideal environment for the growth of bacteria.
⚠️ Attention: Never try to dry the carbon filter with a hairdryer or on a radiator after trying to wash it. Wet filling in the confined space of the refrigerator will lead to mold and dampness, which will spoil the food faster than the absence of a filter.
There is an opinion that if you take out the sponge and put it in the sun for a few days, it will “recharge”. This is a myth. Ultraviolet light can kill bacteria on the surface, but will not restore the adsorption capacity of coal. Therefore disposable filters really are disposable, and replacing them is the only way to restore efficiency to the system.
What happens if you remove the sponge completely?
If you take out the odor absorber, no disaster will happen. The refrigerator will continue to freeze. However, odors will begin to mix more actively, and the shelf life of some delicate products (cheeses, deli meats) may be slightly reduced due to the increased bacterial load in the air.
Instructions for replacing the absorbent filter
Replacing an element does not require calling a technician or special tools. The whole process takes no more than 5 minutes. The main thing is to purchase original consumables or a high-quality analogue that is suitable specifically for your refrigerator model. Using unsuitable chemicals or materials can be hazardous to health.
First, make sure that the refrigerator is plugged in (if the model requires a fan to purge) or, conversely, turned off if access to the filter requires disassembling live panels (although this is rare). Usually it is enough just to open the door of the refrigerator compartment.
☑️ Algorithm for replacing the filter
After removing the old element, wipe the seat with a dry, clean rag. Do not use wet cloths or chemicals to clean the niche, as residual moisture may get into the new filter. Insert the new cartridge, following the direction indicated by the arrows on the body (usually Air Flow).
If your model uses just a sponge in a plastic mesh, make sure that it fits tightly to the edges and air does not pass past it. A loose installation will reduce the cleaning efficiency to zero, since the air will choose the path of least resistance.
Alternative ways to deal with odors
If it is difficult to find an original filter on sale or it is too expensive, you can consider alternative solutions. The market offers many universal odor absorbers that work on a similar principle, but do not require connection to a specific refrigerator model.
One of the popular solutions is containers with silicon dioxide or zeolite. These minerals also perfectly absorb moisture and. odors. They can simply be placed on the shelf next to the products. The effectiveness of such “tablets” or “testicles” is comparable to standard sponges, and the service life is often even longer.
- 🥔 Folk ones methods: black bread, an open pack of soda or ground coffee also work as adsorbents, but they look less aesthetically pleasing and require frequent replacement.
- 🍋 Natural fresheners: citrus zest or vanilla can kill the unpleasant odor, but will not remove its cause, but will only mask it.
- 🦠 Ozonizers: compact devices that generate ozone actively destroy bacteria and odors, but require careful use.
It is important to understand the difference between masking odor and eliminating it. A standard sponge in the refrigerator works to eliminate it, while flavors only create the illusion of freshness. For long-term results, it is better to use proven adsorbent materials.
Frequent errors when operating the cleaning system
Users often make mistakes that negate the operation of the entire system. One of the most common is ignoring the replacement period. People think that if the smell does not seem to be felt, then the filter should not be changed. necessary. However, by this point the filter may have long been oversaturated and working in the opposite direction.
Another mistake is an attempt to “reanimate” the filter by freezing. Some people believe that if you put the sponge in the freezer, the smell will go away. In fact, low temperatures only preserve the odor molecules, which are reactivated when heated.
⚠️ Attention: Do not use alcohol-containing solutions or aggressive household chemicals to clean the filter niche. Vapors of these substances can be absorbed into the new carbon filter when the fan is turned on for the first time, after which the chemical smell will spread throughout all products.
You should also avoid installing filters that have expired. if you bought them “in reserve.” Coal and chemical impregnations tend to degrade over time, even in packaging, especially if it is not sealed. Always check the production date when purchasing consumables.
In conclusion, it is worth noting that the air purification system is an important, but auxiliary element. It will not save spoiled food and will not replace regular cleaning. chamber, this little sponge works wonders in keeping your refrigerator fresh.
How often should you change the sponge in the refrigerator?
The standard service life of a carbon filter is from 6 to 12 months, depending on the intensity of use of the refrigerator and the amount of food with strong odors. If you store a lot of spices, fish or smoked meats, it is better to replace them every 6 months. months.
Can I use a regular household sponge instead of the original one?
No, a regular foam sponge for washing dishes does not have adsorbing properties. It does not contain activated carbon and special impregnations. Installing a regular sponge will not give any effect, and in some cases it can even become a source of bacteria due to its structure.
What to do if after replacing the filter the smell does not disappear?
If replacing the filter did not help, the cause of the smell may lie in contamination of the drainage hole, evaporator or rubber door seals. It is also worth checking whether there are any spilled liquids under or behind the refrigerator. In this case, complete defrosting and thorough washing of all internal surfaces is required. data-i="153">Where to buy an original odor absorber?
Where to buy an original odor absorber?
Original filters can be purchased at authorized service centers of the brand, in large household appliance stores or on the official websites of manufacturers When purchasing, pay attention to the article number indicated in the instructions for your refrigerator, since the size and shape of the cartridges may differ for different models.