From this year onwards, the "Made in China" magnetic levitation centrifugal chillers have been mass-produced in Gree.

Recently, the author learned from Zhuhai Gree Electric Appliance that the magnetic suspension centrifugal chiller designed and manufactured by Gree Electric has been officially launched and publicly displayed. This is another major technological innovation after Gree Electric successfully developed the first centrifugal chiller with independent intellectual property rights in August 2005.

If the centrifugal chiller is the "crown" of large central air conditioners, the magnetic levitation centrifugal chiller is the jewel in the crown. According to authoritative data, since the advent of centrifugal chillers, there have been no substantial technological innovations despite several technical improvements. It was not until 2001 that the world's first magnetic levitation centrifugal chiller was officially born, which broke the silence and embarrassment of this traditional family. Up to now, only three air conditioner manufacturers in the world have mastered this technology. Among them, the Chinese market is completely monopolized by a refrigeration giant in the United States.

Gree magnetic suspension centrifugal chillers were introduced when magnetic levitation technology was not known to most people. Gree Electric has thus become the fourth air conditioner manufacturer in the world and the first in China to truly master the technology and achieve mass production.

Gree technology developers told the author: "The magnetic levitation technology is not as imaginative as anyone thinks. It uses the powerful magnetic field generated between the rare earth permanent magnet and the electromagnet to achieve the suspension of the metal. The magnetic levitation technology applied in the centrifugal chiller means The compressor has a magnetic bearing, which is subjected to magnetic force during operation, and the shaft and the bearing are non-contact rotating, which realizes the complete oil-free operation of the refrigeration system, avoids the complicated lubricating oil system inside the ordinary compressor, and greatly improves the reliability of the unit."

In addition, DC frequency conversion, two-stage compression, full-liquid heat exchangers, high-frequency direct drive and many other international leading technologies have greatly improved the energy efficiency of the unit. According to nationally recognized laboratory data, Gree magnetic suspension centrifugal chillers have a maximum energy efficiency ratio of 16, which is more than 40% more energy efficient than ordinary centrifugal chillers; the noise of the whole machine is less than 70 decibels, which is lower than that of screw chillers. It fully meets the requirements of the country's green buildings and energy conservation and environmental protection.

It is worth mentioning that Gree Electric has digested and absorbed foreign magnetic levitation technology, and through technological innovation, it even surpassed foreign competitors in some performance parameters. For example, the application of “Economizer” makes the Gree magnetic suspension centrifugal chiller increase the energy efficiency by 5% compared with similar foreign products; the application of “group control technology module” can realize the modular combination of up to 8 magnetic levitation centrifugal chillers. The cooling capacity exceeds 5,600 kW, which fully meets the needs of large-scale buildings such as hotels, clubs and office buildings.

A senior researcher at the China Household Electrical Appliances Research Institute said that the Gree magnetic suspension centrifugal chiller has perfected the product line of domestic large-scale central air-conditioning, breaking the technological monopoly of this field in Europe and the United States, which will greatly enhance the domestic air-conditioning brand in the domestic and foreign markets. The competitiveness of the United States, a current refrigeration giant in the United States exclusive access to the Chinese magnetic suspension centrifugal chiller market "cheese" situation is just around the corner.

As one of the earliest home appliance companies in the field of central air-conditioning, Gree Electric has completed the storage of central air-conditioning technology and the construction of central air-conditioning production base in recent years. At present, it has mastered centrifugal units, modular units, multi-line groups, screw units, etc. The core technology and production process of central air-conditioning products have formed a series of 9 series of more than 1000 varieties of products, covering everything from small home central air conditioners to large-scale commercial central air conditioners. Sales have grown steadily and have become A strong competitor of well-known foreign central air-conditioning brands.