No frost system in the refrigerator: features, principle of operation, selection criteria

Most likely, modern young housewives do not even know that a few decades ago, defrosting the refrigerator was an obligatory item on the list of women's housework. Yes, completely in manual mode, pulling out all the food while grappling with the large chunks of ice in the freezer. This uninteresting lesson took almost half a day.

New models of refrigerators have been equipped with automatic defrosting systems for a long time. The frost, which forms in any freezer, from time to time, a smart device removes on one's own, human participation is not required. In most cases, the drip removal system is responsible for removing frost.

No frost system, what is it? Let's try to figure it out.

Frost removal principle

In a drip system evaporator the rear wall of the refrigerator compartment and freezer compartment is cooled. As you may have noticed, the compressor of the refrigerator works intermittently, the operating mode is replaced by stops

. While it is in operation, the evaporator cools down, small pieces of ice appear on the cooled walls near it, they are formed from the moisture contained in the air masses. Then the compressor turns off, the pieces of ice melt, the resulting water flows down through special groove channels into the tray above the compressor. The compressor starts up again, heats up - the water will evaporate. In the meantime, new pieces of ice will be created, which leads to a constant repetition of the cycle.

No frost system, what is it in the fridge? The know frost refrigerator works on a different principle. The main difference from the drip system is built-in cooler fan.

The fan is designed to provide constant circulation of cold air in the unit. The evaporator is located in a separate compartment, usually between the refrigerator and freezer compartments.

Air enters the evaporator from one side, where it is cooled. It comes out on the other side, and the frost remains on the evaporator itself. The frost melts while the compressor is off, and water also flows to a tray located outside on the back wall in the immediate vicinity of the compressor.

Drip defrost is only used for refrigeration chambersR. Both freezers and refrigerated cabinets can be equipped with the no frost system.

Frost free models have drip defrosting of the refrigerator compartment, and the "know frost" principle works in freezers.

The full no frost mark means that both parts of the refrigerator are equipped with no frost fans and their own evaporators. Such units differ efficiency and power.

Pros and cons of the system

When we found out what the "know frost" system in the refrigerator is, you should pay attention to the advantages of using such units.

There are several positive points:

• The presence of constant forced air circulation allows you to quickly cool food with a minimum temperature difference throughout the entire volume of the refrigerating chamber.
• Freezers freeze food very quickly.
• After loading new products and frequent door openings, the temperature inside recovers much faster than in units with a drip defrost system.

But despite the obvious advantages, there are some disadvantages:

• The block of the "know frost" system occupies the internal volume of the units, which reduces their capacity.
• A constantly running fan will slightly increase energy consumption.
• The fan also increases the noise level during operation.
• Food can quickly erode and should be packaged.
• Units of this type are more expensive than those equipped with a drip system.

Is it worth buying

Sellers in home appliance stores will most likely advise purchasing just such units. But it is worth weighing all the arguments before making a decision. Knowing what the “know frost” system in the refrigerator is, it will be easier to make a purchase.

The presence of the system will increase the cost of the refrigerator, and the energy consumption will increase with a uniform temperature regime. But if you don't pay attention to temperature differences by placing food at different levels, you won't need this advantage.

When you do not open the freezer doors too often, do not constantly put a large amount of food in there to freeze, then the quick freeze mode is most likely not needed.

If you do not live in a region with high humidity, then it will not be difficult to eliminate excess moisture that has got inside the device. Interestingly, most companies that produce refrigeration and freezing household appliances produce know-frost units in limited quantities, since residents of European countries are economical and do not rush to spend money on expensive technique.

Maintenance rules for units

It is worth noting that "know frost" refrigerators will have to be disconnected from the mains at least once or twice a year. It's not about hoarfrost or chunks of ice. They really won't be. Cleaning is carried out solely for hygiene reasons. The point is, in order to wash well and eliminate germs from the device, it is necessary to remove the cord from the network.

Follow a few guidelines and your refrigerator will always shine:

1. The temperature regulator must be at minimum (zero) values. Then turn off the electricity.
2. Remove all contents from the shelves and wait a little so that the temperature inside can reach room temperature.
3. Remove all shelves and drawers, rinse them under running warm (not hot!) Water.
4. Wipe them with a microfiber cloth or a soft, lint-free cloth.
5. Prepare a solution for cleaning the interior surfaces: dissolve 1 teaspoon of baking soda in a liter of water and wipe the inside of the refrigerator with this solution. A soft toothbrush can help clean up the hard-to-reach areas.
6. Wait 15 minutes and wipe the inside of the unit with a soft cloth without adding detergents.
7. After drying, replace the shelves and drawers, arrange the food.

When a person becomes aware that it is no frost in the refrigerator, then it will not be difficult to choose a model just for himself. The no frost refrigerator will be a worthy purchase.