The refrigeration method used by early refrigerators was direct cool type. The biggest disadvantage of direct cool refrigerators is that the refrigerator will frost after a period of use, so manual defrosting is required. More and more people complain about this point. When there is demand in the market, merchants seize the business opportunity, and scientific researchers work hard to develop the new version, and then there are frost-free refrigerators, which solve the problem of refrigerator frosting.
It is not that direct cool refrigerators are not good, and frost-free refrigerators are better. In fact, direct cooling and frost-free types have their own advantages and disadvantages. Let's take a detailed look at the advantages and disadvantages of frost-free refrigerators and direct cool refrigerators.
1. Direct Cool Refrigerator Basics
In direct cool refrigerators, the cooling pipe of the refrigerator evaporator is designed to be directly attached to the inside or back of the refrigerator and freezer compartments. When the evaporator absorbs heat, natural convection is formed in the refrigerator, and refrigeration is gradually achieved, that is, direct cooling.
However, there has always been a very difficult problem with direct cool refrigerators, that is, frosting. When the water vapor in the refrigerator encounters the cooling pipe with a very low temperature on the inner wall of the refrigerator, frosting will occur.
● Once the refrigerator is frosted, it must be cleaned manually, which is time-consuming and laborious.
● Frosting in the refrigerator will also affect the refrigeration efficiency. The natural convection inside the refrigerator makes the refrigerator's coldness unevenly distributed, affecting the refrigeration effect.
● There will also be dead corners that can not be refrigerated, affecting the food preservation effect.
● In addition, the frost inside the refrigerator can easily cause food in the freezer compartment to stick together, destroy the surface of the food, and affect its appearance and taste.
1.1 Advantages of Direct Cool Refrigerators
Direct cool refrigerators are simpler in structure than frost-free refrigerators. The simpler the structure, the lower the failure rate. Even if there is a problem, the maintenance cost is lower. And it is the simple structure of direct cool refrigerators that makes the price lower.
In addition to the above advantages, direct cool refrigerators have another very important advantage. The moisturizing effect of direct cool refrigerators is better than that of frost-free refrigerators. They can better retain the moisture of vegetables and fruits, and make them not turn yellow or dry.
1.2 Disadvantages of Direct Cool Refrigerators
The disadvantages of direct cool refrigerators are also obvious. It is easy for the interior of direct cool refrigerators to frost after a period of use. If it is not defrosted, the power consumption of the refrigerator will be higher than before the refrigerator is frosted, and the vegetables and fruits in the refrigerator are also easy to freeze. Therefore, the refrigerator needs to be manually defrosted regularly when it is frosted.
In addition to being easy to frost and requiring manual defrosting, direct cool refrigerators have more uneven refrigeration effects and are less friendly to food preservation and freezing.
2. Frost-Free Refrigerator Basics
With the advancement of technology, advanced frost-free technology has been widely used in refrigerators, effectively solving the frosting problem and becoming more and more popular with consumers.
Simply put, frost-free technology is to set up an evaporator component separately in the refrigerator, which is separated from the refrigerator compartment. The cold air generated around the evaporator is forced to circulate through the fan, so that the cold air is evenly distributed inside the refrigerator body, thereby achieving refrigeration.
In fact, it is inaccurate to say that frost-free refrigerators do not produce frost, because there is frost on the evaporator. The evaporator of the frost-free refrigerator is separated from the inner wall of the refrigerator, that is, no frost is produced on the inner wall of the refrigerator. The frost formed on the evaporator can be removed by heating, that is, after the refrigerator has been working for a period of time, the refrigeration is stopped, and the defrosting system is started. After the frost is heated, it turns into water or evaporates into steam and then is safely discharged. This part of the work is completed automatically by the refrigerator, and no manual processing is required.
In addition to not requiring manual defrosting, the refrigerator refrigerated by frost-free technology uses a fan to force cold air to circulate, making the cooling speed of the refrigerator faster, the temperature control more precise, and food nutrients less likely to lose. In addition, the evaporator and food are separated, and the fan forces the circulation of cold air, so that the food inside the refrigerator will not freeze together, and the circulating cold air flow also makes the refrigerator smell relatively fresh.
2.1 Advantages of Frost-Free Refrigerators
The biggest advantage of the frost-free refrigerator is that it does not require manual defrosting when it is frosted. The refrigerator will automatically defrost. Therefore, the frosting phenomenon is invisible to the frost-free refrigerator we use in daily life, so there is no need to manually defrost!
Frost-free refrigerators are the mainstream in the refrigerator market. There are frost-free refrigerators of various capacities, ranging from dozens of liters to more than 700 liters. They feature large capacities, many choices, and simple and beautiful design.
The temperature is uniform. The temperature distribution in the frost-free refrigerator is more even, which can better maintain the freshness and humidity of the food.
The frost-free refrigerator has more complete functions, and is better at odor removal, sterilization, and freezing than direct cool refrigerators.
2.2 Disadvantages of Frost-Free Refrigerators
The structure of frost-free refrigerators is more complex than that of direct cool refrigerators, so the failure rate is relatively higher, the maintenance cost is higher, and the price is higher.
The moisture retention of frost-free refrigerators is slightly worse than that of direct cool refrigerators.
3. Conclusion
In fact, direct cool refrigerators and frost-free refrigerators have their own advantages and disadvantages.
However, direct cool refrigerators are usually only used in a small number of single-door refrigerators, double-door refrigerators and three-door refrigerators. For large-capacity multi-door refrigerators, including side-by-side refrigerators, cross door refrigerators, and T-door refrigerators, there are basically no direct cool refrigerators, all of which are frost-free refrigerators.
There is no need to worry about whether to choose a direct cool refrigerator or a frost-free refrigerator. For home use, choose a frost-free refrigerator. Direct cool refrigerators are more suitable for rental houses, student apartments, and offices. For these places, direct cool refrigerators can be given priority.
