Frost-free refrigerator catches cold and fast shuttle

In 2010, the refrigerator industry showed a clear trend of high-end, and under this trend, refrigerator technology has been continuously upgraded. Recently, frost-free refrigerators have become a hot spot in the market. Monitoring data from Zhongyikang show that from January to November 2010, sales of air-cooled refrigerators increased by 56.05% year-on-year, and retail sales increased by 46.94% year-on-year. The reporter learned from the interview that the mainstream companies in the industry are actively promoting frost-free refrigerators on the one hand, and are also working hard to upgrade air-cooled technologies on the one hand, and pushing the refrigerators toward an era of frost-free, energy-saving and preservation.

High-end refrigerator with hot air-cooled frost-free refrigerator with air-cooled technology, sales increased by over 50% year-on-year.

Currently, frost-free refrigerators on the market use air-cooled technology, while traditional refrigerators use direct-cooling technology. The evaporator of the air-cooled refrigerator is not in direct contact with the food. The evaporator can heat up the evaporator for a short time through the heating system, and the refrigeration can be resumed immediately after the defrosting. The refrigerator will not have frost.

The conventional freezer freezer compartment is directly surrounded by an evaporator or has an evaporator in the freezer compartment. In addition, an evaporator is provided in the upper part of the freezer compartment, and the evaporator directly draws heat. The advantage of the direct-freezer is its low power consumption, low noise, low price, and refrigerated food preservation, but its poor temperature uniformity requires manual defrosting.

The air-cooled refrigerator adopts fan forced heat exchange, the cooling capacity is relatively large, the cooling speed is fast, the temperature inside the box is even, and it has an automatic defrosting function, and no manual defrosting is required.

However, the fin evaporator fans used in air-cooled refrigerators have relatively large volume of parts such as forced heat exchange systems and air duct systems, which results in relatively low capacity utilization of the refrigerators. Therefore, air-cooled technologies are usually carried in large-capacity refrigerators. on. In addition, air-cooled refrigerators have relatively high noise, high energy consumption, and relatively poor moisturizing effects.

Based on the technical features of air-cooled and direct-cooled refrigerators, in the past, air-cooled technology was mainly carried on large-capacity refrigerators of 230 liters or more. For this reason, the mainstream product type on the market is still a direct-freezer refrigerator. However, with the rapid growth in sales of three-door, multi-door, and side-by-side refrigerators in recent years, air-cooled refrigerators have also taken express trains and their market share has rapidly increased.

The reporter learned that mainstream companies such as Haier, Midea, and Xinfei learned that these companies have adopted air-cooled technology in three-door, multi-door, and side-by-side refrigerators, and their production ratio will increase with the increase in demand.

In recent years, the sales volume of air-cooled refrigerators has grown rapidly, and the growth rate is basically above 20%. In 2010, this growth rate increased rapidly. The latest monitoring data from Zhongyikang showed that from January to November 2010, the retail volume of air-cooled refrigerators increased by 56.05% year-on-year, and retail sales increased by 46.94% year-on-year.

Huang Wei, Director of Information Research Department of Haier Refrigeration Planning Department, told the “China Electronics News” reporter: “According to the needs of users, the trend of accelerating the popularity of air-cooled refrigerators is positive. Now that the pace of life is accelerating, the number of consumers purchasing foods has decreased, but The quantity is increased, and many times it is concentrated once a week, which requires better preservation of the refrigerator, greater capacity, and faster cooling. The characteristics of the air-cooled refrigerator meet these requirements, and we are very optimistic about the prospect of air-cooled refrigerators."

In the future, a larger area will be equipped with technologies such as frequency conversion and moisture retention, and the technical shortcomings of air-cooled refrigerators will continue to make up for it.



Conforming to the trend of high-end refrigerators, major companies have been working hard on technology upgrades, and air-cooled technology has entered an upgrade period. For the characteristics of air-cooled and direct-cooled technology, some companies have introduced refrigerators equipped with both wind and direct cooling technology. They use direct cooling in the cold room to avoid food drying and use air-cooling in the freezer to avoid frost on the refrigerator. In addition, with a number of technologies such as frequency conversion and moisture retention, the technical shortcomings of air-cooled refrigerators are constantly being made up.

Huang Wei told reporters that in the past, the combination of wind and cold refrigerators realized air-cooled and frost-free in the middle temperature zone, but refrigeration and freezer rooms are still prone to frost. Haier's latest frost-free three-door refrigerator broke through the technical bottleneck of direct-cooling and direct-air cooling combined products, achieved full-air cooling and frost-free, and reached three temperature zones of refrigerating, variable temperature and freezing without frost. The application of stepless frequency conversion technology effectively solves the technical problems of high energy consumption and noise in air-cooled refrigerators. Haier's frost-free three-door refrigerator has a power saving of approximately 10% compared to a similar volume, and the noise is 27% lower than the national standard.

U.S. recently launched four series of Van Dylan high-end refrigerators. The U.S. Van Tie Luo's on-door refrigerator adopts a three-dimensional air-cooled frost-free refrigeration system, which makes the cooling more uniform and avoids frosting inside the refrigerator, food dehydration and air-drying. Fanti Royce refrigerators even have an 80% moisture retention rate that is close to the limits of nature.

In addition, the air-cooling technology is gradually being carried on small-volume refrigerators, and air-cooled two-door refrigerators have appeared on the market. At present, Haier, Samsung, Rongsheng and Other brands have introduced two air-cooled refrigerators.

“With the continuous advancement of air-cooled technology, the shortcomings of air-cooled refrigerators will be gradually overcome, and air-cooled refrigerators are relatively easy to implement for some refrigeration functions. In the future, air-cooled technology will be more equipped in the refrigerator.” Xinfei Zhang Jiantao, an engineer of the Air-cooled Refrigerator Research Institute, said, “We expect the next 3 to 5 years will be the golden period for the rapid development of air-cooled refrigerators.”

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