Air cooled refrigerator principle The difference between air cooled refrigerator and direct cooled r

The principle of air-cooled refrigerator: when the fan is used to promote the flow of gas in the refrigerator, the refrigeration and cooling effect is achieved through the evaporator, which belongs to the frost-free refrigerator.

Difference Between Air-Cooled Refrigerator and Direct-Cooled Refrigerator:

The internal structure of air-cooled refrigerators is more complex than that of direct-cooled refrigerators, so the manufacturing cost of the product is higher and more expensive; The direct cooling refrigerator is usually used for two-door economical products, and the direct cooling structure is that the evaporator is directly exposed to the box, the cost will be lower, and the noise is relatively small.

Air-cooled refrigerators are relatively large in terms of energy consumption and noise; The consumption of direct-cooling refrigerators is relatively small.

Air cooling is due to the forced circulation of cold air, so the cooling speed is fast and the temperature balance is good; However, direct cooling refrigerators rely on natural convection, so the temperature balance is relatively poor, and the cooling rate is relatively low.

The air-cooled refrigerator constantly brings the moisture in the box to the evaporator, and then flows away when it is defrosted, which brings dry consumption in the box, which is not conducive to freshness; Whereas a direct-cooling refrigerator is the opposite.

Since there is no electric fan, the air-cooled type will not generate additional noise and power consumption, and will not cause drying on the surface of the food due to blowing; Whereas, the direct-cooling refrigerator is equipped with an electric fan.

An air-cooled refrigerator won't always be wet on the inside like a refrigerated refrigerator, and the food won't stick to each other. Moreover, the air-cooled refrigerator will have a continuous circulation of cold air, and then through the filtration of the deodorization system, the internal odor will remain fresh for a long time, and there will be no more pungent"Refrigerator smell"。Also, because the air-cooled refrigerator can be automatically defrosted.

Features of air-cooled refrigerators: similar to air-conditioning refrigeration, no frosting, and uniform freezing.

Disadvantages of air-cooled refrigerators: high noise, high quality, small number on the market, small range of options.

Direct cooling refrigerator: refers to the composite three-dimensional structure of multi-layer heat exchanger plate in the refrigerator freezer evaporator, and fixes the set fins on the outside of the S-type refrigeration coil wall to increase the refrigeration capacity of the two high-temperature areas at the top and low part of the freezer.

Advantages of a direct-cooling refrigerator:

Low power consumption, ** low, direct cooling refrigerators are usually used for two-door economical products, the direct cooling structure is that the evaporator is directly exposed to the box, the cost will be lower, and the noise is relatively small.

The disadvantages of the direct cooling refrigerator: the refrigeration speed is relatively slow, the refrigeration speed of the direct cooling refrigerator is relatively slow, which will make people feel very inconvenient to use, and the evaporator is prone to collision, scratching, corrosion and leakage affecting the life, the biggest disadvantage is that manual defrosting must be carried out several times a year.

Air-cooled refrigerators have no frost, because an evaporator is set inside, and then the cold air is sent to various positions of the refrigerator through fans and air ducts. Since its evaporator is hidden inside the refrigerator, we can't see the frost it produces.

Direct cooling refrigerators generally have frost because they use the natural convection of air in the refrigerator to cool food. Because the evaporator is often installed in the upper part of the refrigerator, the air around the evaporator has to exchange heat with the evaporator, and the air transfers heat to the evaporator, and the evaporator transfers the cold energy to the air. After the air absorbs the cold energy, the temperature drops, the density increases, and it moves downward.

The air in the lower part of the refrigerator should have a heat exchange with the cooled food, and the food will transfer the heat to the air, and after the air gets the heat, the temperature will rise, the density will decrease, and it will rise to the periphery of the evaporator and transfer the heat to the evaporator. In this way, the hot and cold air circulate through natural convection to achieve the purpose of cooling. Since the evaporator is the inner wall of the refrigerator, it is impossible to set up a defrosting system, so it is necessary to defrost manually.

First, come coldly.

Box pros and cons sources.

Advantages: The power consumption of the direct cooling refrigerator is relatively low, and the evaporator is directly exposed to the box, so the cost will be lower and the noise is relatively small.

Disadvantages: The cooling speed of the direct cooling refrigerator is relatively slow, which will make people feel inconvenient to use, and the evaporator is prone to collision. Scrape. Corrosion, causing leakage and affecting life. The biggest disadvantage is that manual defrosting must be carried out several times a year.

2. Advantages and disadvantages of air-cooled refrigerators.

Advantages: Air-cooled refrigerators do not frost like direct-cooled refrigerators, so the inside of the refrigerator is always wet, and the food does not stick to each other. In addition, the air-cooled refrigerator will have a constant circulation of cold air, and then through the deodorization system filtration, the internal odor will also remain fresh for a long time.

In addition, air-cooled refrigerators have more precise temperature control than direct-cooled refrigerators. Because the direct cooling refrigerator is prone to refrigeration dead ends, after all, the evaporator is attached to the box, so the temperature of the temperature control point test may be different from the actual temperature of the refrigerator as a whole, which will affect the preservation quality of food.

Disadvantages: Because there will be cold air circulating inside the air-cooled refrigerator, which will make the air humidity in the refrigerator low, some foods are easy to lack water if they are not isolated with plastic wrap or crisper boxes, and then be blown dry. In addition, the internal structure of air-cooled refrigerators is more complex than that of direct-cooled refrigerators, so the manufacturing cost of the product is higher and more expensive.

In addition, the reason for the rotation of the fan is that the noise is also louder than that of a direct-cooling refrigerator.

1) The direct cooling box needs to be manually defrosted, and the frost is mainly formed on the evaporator of the freezer, and the amount of frost is large after long-term use, which will affect the refrigeration effect and lead to an increase in power consumption. The evaporator of the air-cooled box is not in direct contact with the food, it can be automatically defrosted, without manual defrosting, and it is generally defrosted regularly according to the cumulative running time of the compressor (the mechanical air-cooled box has a defrosting timer), in addition, the computer box will generally accumulate the user's opening time to control the defrosting interval, which is relatively flexible.

2) The temperature control of each chamber of the direct cooling box is generally matched by the area of the evaporator of different compartments (single system), and for the double system or multi-system direct cooling box, the flow of refrigerant to different evaporators is controlled by solenoid valves to achieve the purpose of temperature control. The air-cooled box is generally installed in the freezer with only one finned evaporator, and the temperature control of each chamber generally meets the set requirements by controlling the opening and closing of the damper.

3) The direct cooling box exchanges heat through heat conduction and natural convection, and the cooling quick-freezing is slow and the temperature is uneven. The air cooling box is driven by the fan to drive the air circulation in the box for forced convection heat exchange, the cooling speed is fast, the temperature is uniform, the temperature control is accurate, the design of the air duct system has a great impact on the refrigeration effect, mainly to ensure that the air duct circulation is unimpeded.

4) The power consumption of the air-cooled box is generally greater than that of the refrigeration box due to the fixed defrosting cycle, the power of the motor, various heating wires and the power consumed by the main control board itself. Similarly, due to the rotation of the fan motor and the flow of airflow, the noise is generally greater than that of the direct cooling box.

5) The air-cooled box can make the food dry quickly, which is generally not conducive to food preservation. Although there are some so-called preservation techniques, they only set up a relatively closed area in a small area, otherwise the cold air will go directly and only flow through the surrounding areas, such as the fresh-keeping drawer.

What is the difference between a direct-cooled and air-cooled refrigerator? I understand the analysis of pedestrians, and I am glad that my family did not buy it wrong.

Refrigerator choice direct cooling or air cooling: direct cooling is suitable for small-capacity refrigerators, it has the advantages of low manufacturing cost, good fresh-keeping effect and low power consumption. The air-cooled type is suitable for large-capacity refrigerators, it does not need to be defrosted, it is clean and refreshing, the refrigeration is uniform, and the food will not freeze together, which greatly reduces the phenomenon of cross-flavor.

The cold ice box is the use of cold air in the refrigerator to circulate for refrigeration. **Expensive. Empty DAO airflow through the built-in evaporator (with the refrigerator inside the back.)

Due to the low temperature of the evaporator, the temperature of the air will be reduced to cold air, and the internal odor will remain fresh for a long time, and the inner wall of the refrigerator is easy to frost and is blown into the refrigerator for cooling. The disadvantage is that the fan is noisy in operation. The biggest advantage of an air-cooled refrigerator is that it is frost-free.

Direct cooling refrigerator is a refrigerant that directly cools the inner wall of the refrigerator after being cooled by an evaporator.

The differences between air-cooled refrigerators and direct-cooled refrigerators are as follows:1Refrigerated air-cooled refrigerators use automatic air supply technology, which can quickly refrigerate food with good refrigeration effect; Direct cooling refrigerators use convection technology and do not refrige as fast as air-cooled refrigerators.

2.Noises. Air-cooled refrigerators are more noisy than direct-cooled refrigerators, and more noise may be generated during use.

If you like quiet friends, you should consider whether it is suitable to choose an air-cooled refrigerator. 3.Energy conservation.

Frosting characteristicsThe inside of the air-cooled refrigerator is not easy to frost, and the food can be kept dry independently and will not stick together; Straight refrigerators tend to feel damp, refrigerators tend to frost, and food sticks to each other. Air-cooled refrigerator principle: The principle of air-cooled refrigerator is to use air for refrigeration.

When high-temperature air flows through the built-in evaporator (separated from the inner wall of the refrigerator), the air temperature will decrease due to the high air temperature and the low temperature of the evaporator. At the same time, cold air is blown into the refrigerator. Air-cooled refrigerators are used to reduce the temperature of the refrigerator through this constant cycle.

But there is always water vapor in the air, which condenses when it is cold, so as long as there is heat exchange in the refrigerator, frost will form. Air-cooled refrigerators are not frost-free, but frost condenses on the evaporator. Because it is inside the refrigerator, we can't see it directly when we open the refrigerator door, so it is called frost-free.

Unconsciously, the refrigerators on the market have formed two camps: co-cooling refrigerators and direct-cooling refrigerators. Users may be overwhelmed by these two relatively unfamiliar words when choosing. Which of the two refrigerators is better, or, depending on your needs, how to choose how to cool your refrigerator.

Today we talk about the advantages of air-cooled refrigerators and direct-cooled refrigerators, allowing users to better know what they are after when they buy. There are so many differences between whether the refrigerator is air-cooled or buy straight cool, and the salesperson will not tell you.

The difference between an air-cooled refrigerator and a direct-cooled refrigerator, the biggest difference between the two refrigerators is the different heat transfer methods. We all know that the so-called "cooling" of the refrigerator is actually a heat exchange process. The heat inside the refrigerator is somehow transferred to the outside of the refrigerator.

The "one way" here is air cooling and direct cooling. Direct cooling refrigerator is the most traditional heat exchange method (before the advent of air-cooled refrigerators, all refrigerators were direct cooling, but there is no word "direct cooling"), that is, the heat exchanger 3354 compressor is started by the inner wall of the refrigerator to reduce the temperature of the evaporator.

The evaporator clings to the inner wall of this refrigerator and absorbs the heat from the refrigerator. It can be understood as a person holding the ice and blowing the wind. Ice is the evaporator, and people are the inside space of the refrigerator.

Air-cooled refrigerators are a type of heat exchange that has only recently become popular. Relying on a fan to blow cold air into the refrigerator while driving away the hot air also lowers the temperature of the evaporator. In addition, the evaporator does not fit snugly against the inner wall of the refrigerator, but in a separate space.

The temperature of this space reduces the role of the evaporator, which is driven into the refrigerator by a fan.

Put an electric fan in front of the ice and sit in front of the electric fan to sit cool. The biggest difference with a direct-cooling refrigerator is that there are more such fans. And the distance between man and ice is subtracted.

The advantages of air-cooled refrigerators, the difference in structure leads to the difference in performance. When in use, air-cooled refrigerators have three major advantages. The temperature is uniform.

People are holding the ice and blowing air, the temperature is low in the place where it touches the ice, and the temperature is high in the place away from the ice. The same goes for direct-cooling refrigerators. The vaporizer is not that big and only exists in one corner of the refrigerator.

The temperature of the direct cooling refrigerator varies. This is why the closer you are to the evaporator area, the lower the temperature, and the food placed in the refrigerator sometimes freezes when it sticks to the inside of the refrigerator. Air-cooled refrigerators don't have this distress at all.

When the cold air blows into the refrigerator, the air inside moves quickly and the temperature is very uniform. In addition, in order to expand the advantage of "uniform temperature", current air-cooled refrigerators are equipped with multiple multi-angle fans to blow cold air in all directions. The temperature is correct.

A direct-cooled refrigerator is directly from the freezer compartment, which absorbs heat and easily produces frost, while an air-cooled refrigerator is blown out of the interior by cold air, which can alleviate the frosting of sulfur when the refrigerator is opened. Moreover, the refrigeration effect of the direct cooling refrigerator is also very slow, and the refrigeration speed of the air-cooled refrigerator is particularly fast, but its noise is particularly large, and the failure rate will be higher than that of the direct cooling refrigerator.

First of all, the effect of refrigeration is completely different, and the refrigeration speed of air-cooled refrigerators is generally faster; Then the noise of the air-cooled refrigerator is generally relatively large, and it also consumes more electricity, and then the structure is more complicated.

The air-cooled refrigerator is circulated by generating cold air through the evaporator, but the refrigeration refrigerator is connected through the refrigeration chamber, and finally produces cold air, and the failure rate of the direct cooling refrigerator is particularly low, and the structure inside is also very simple, which is very power-saving, but the air-cooled refrigerator can play a defrosting effect, and the humidity is relatively small, and the power consumption is very large.

Air-cooled refrigerator is a small fan inside the refrigerator, which achieves cooling through air cooling, which is not suitable for long-term storage and food will be blown dry, and direct cooling refrigerator is to cool the refrigerator through condensants.

In fact, the air-cooled refrigerator means that its wind is also quite strong, and then its coldness is also very high, but the direct cooling refrigerator means that there is no such wind, and it moves very fast, and the difference is also very big.