Microchannel Aluminum Flat Tube

1. Historical changes of refrigerants

In 1989, the Montreal Protocol, the first agreement to limit the use of CFCs, was signed, accelerating the process of protecting the ozone from chemical destruction. At that time, the preferred alternative was R22, and most of the commercial air conditioners and other electrical appliances are still in use today. However, the massive consumption of R22 will bring another catastrophic damage to the earth-greenhouse gas effect, so it has also been banned: 65% in 2003, 35% in 2010, 10% in 2015, and a total ban in 2020 (post-adjustment 2030)! And has switched to R134a, R407C, R410a and other new environmental protection refrigeration, and first in the car air conditioning system to obtain mandatory use (EU regulations for 1996, China regulations for 2002). Now more commonly used high pressure and high gas density R410a, not only can use a smaller displacement of the compressor, but also can use a smaller diameter of the pipeline and valve, so become the world's commercial refrigerant choice. The parallel flow micro flow evaporator and condenser with high pressure resistance have become the best choice for domestic and commercial air conditioning systems.

2, car air conditioning rate into the micro-channel era.

Microchannel heat exchangers (commonly known as parallel flow evaporators and condensers) were developed by two professors from Stanford University in the United States as early as 1981. In 1996, they were applied to automobile air conditioning systems with environmentally friendly refrigerant R134a as refrigerant. At present, all automobile air conditioning systems use this microchannel heat exchanger.

3, household, commercial air conditioning ready to go

The application of micro-channel heat exchangers on domestic and commercial air-conditioning systems is much later. The first is to quickly turn to the Japanese market of R410a, from being used in small air conditioners with less than 2 horses, and gradually to large air conditioners. At the same time, in order to obtain high efficiency, the measure of expanding the heat exchange area of air conditioners to improve the energy efficiency ratio is taken. The preferred component to expand the heat exchange area of air conditioning is undoubtedly all aluminum microchannel heat exchanger.

As the ban order period is getting closer and closer, more and more well-known air-conditioning companies at home and abroad have begun to develop and use all-aluminum microchannel heat exchangers. As early as nine years ago, the United States began to use all-aluminum microchannel heat exchangers on household air conditioners, and 100 percent of the aircraft carriers of the United States air conditioning industry "York" have used all-aluminum microchannel heat exchangers on their products; air conditioning manufacturers in Japan and South Korea, such as Sharp and Samsung, began research on microchannel heat exchangers a few years ago.

In China, it is more urgent to accelerate the replacement of home and commercial air conditioners:

First of all, China's air-conditioning production became the world many years ago, and in recent years it has accounted for more than 70% of the annual air-conditioning production. Restrictions and bans are the first to bear the brunt of China;

Secondly, the fierce competition in the Chinese and commercial air-conditioning market, coupled with the high copper price, makes it difficult for enterprises to bear, forcing enterprises to speed up the pace of "aluminum instead of copper" and the application of new technologies, that is, to meet environmental protection, efficiency, energy saving, and at the same time greatly reduce the cost, while the same volume of aluminum price is only a 1/12 of copper price, the application of parallel flow technology has naturally become the main direction of cost reduction;

Third, a series of mandatory energy-saving policies, laws and regulations and industrial standards have been issued. The air conditioning to achieve energy-saving there are three main: one is the use of frequency conversion control, but the frequency converter will increase a lot of costs; the second is in the copper tube heat exchanger to directly replace the refrigerant R410a refrigerant, but will lead to higher costs. The third is the use of parallel flow microchannel heat exchanger, which is environmentally friendly, effective and energy-saving, and can reduce costs by more than 50%. Therefore,Microchannel Aluminum Flat TubeBecome a home, commercial air conditioning replacement options and outlets.