Large central air conditioners add new, magnetic suspension centrifugal chillers come out

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.

Auxiliary Agent

Auxiliary agents, also known as additives, are substances that are added to a material to improve or modify its properties. In the field of polymers, auxiliary agents are commonly used to enhance the processing, performance, and durability of polymer materials.

There are several types of auxiliary agents, each with its own unique properties and applications. The most common type is processing aids, which are added to polymer materials to improve their flow and moldability during processing. Processing aids can improve the surface finish of the final product and reduce the amount of energy required during processing.

Another type of auxiliary agent is plasticizers, which are added to polymer materials to increase their flexibility and reduce their brittleness. Plasticizers can improve the toughness and impact resistance of the final product and are commonly used in the production of flexible PVC products, such as hoses and films.

Other types of auxiliary agents include stabilizers, which are added to polymer materials to protect them from degradation caused by heat, light, or chemical exposure. Stabilizers can improve the durability and longevity of the final product and are commonly used in outdoor applications, such as building materials and automotive parts.

Colorants, fillers, and flame retardants are also common types of auxiliary agents. Colorants are added to polymer materials to give them a specific color, while fillers are added to improve the mechanical properties of the final product, such as its strength and stiffness. Flame retardants are added to polymer materials to reduce the risk of fire and are commonly used in applications where fire safety is critical, such as building materials and electronics.

The choice of auxiliary agent depends on the specific application requirements and must be carefully considered to ensure that the final product meets the desired specifications. It is important to select the appropriate auxiliary agent to achieve the desired performance, processing, and durability characteristics of the polymer material.

In summary, auxiliary agents play an important role in the processing, performance, and durability of polymer materials. There are several types of auxiliary agents, each with its own unique properties and applications, and the choice of auxiliary agent depends on the specific application requirements.

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