中文
EN
Air conditioning green efficient refrigeration choose ndfeb or ferrite?
According to the main goal of the seven national ministries and commissions jointly issued the "Green Efficient Refrigeration Action Plan" on June 13, the energy efficiency of China's refrigeration products will be greatly improved on two nodes: by 2022, the energy efficiency of household air conditioners, multi-connected refrigeration products The level will increase by more than 30%, and the market share of green and efficient refrigeration products will increase by 20%. By 2030, the overall energy efficiency of refrigeration will increase by more than 25%, and the market share of green and efficient refrigeration products will increase by more than 40%.
So what about the use of rare earth permanent magnets in the field of home appliances? As we all know, rare earth permanent magnets are used in the field of frequency conversion of home appliances, such as variable frequency rotor compressors and scroll compressors. It is understood that in inverter compressors, the permeability of neodymium iron boron is only about 46%, and most of the rest (54 About %) is still using ferrite.
The mainstream grades of NdFeB used in compressors are mainly products of 48SH and above, such as 48SH, 38UH, 38EH, etc.; these brands are currently priced between 320-390 yuan/kg, assuming 0.12 on each compressor. Kg of NdFeB, the market price is between 38-47 yuan. For ferrite, the price is only 6-8 yuan / kg, its amount is several times the amount of NdFeB, the price is up to 10 yuan, far cheaper than NdFeB, but the use of ferrite will lead to increased compressor volume This will increase the amount of other raw materials such as steel, copper, refrigerant, etc., and will also increase the cost of raw materials.
The most important thing is that the maximum intrinsic coercivity of permanent ferrite is only about 5.2 Koe, and the maximum magnetic energy product does not exceed 5.2 Koe. However, the coercive force and magnetic energy product of the lowest grade NdFeB in the inverter compressor are At 19Koe and above 36Koe, the performance of ferrites simply cannot meet the current first- and second-level energy efficiency standards. According to the industry's online understanding, the new energy efficiency standards will be introduced, and the old 1 to 3 products will be changed to 1 to 5 products. The new energy efficiency standards are basically variable frequency products, and the air conditioning energy efficiency requirements are further. Improvement, it is likely that the ferrite performance will not be further matched, so NdFeB will become the mainstream in the field of inverter air conditioners.
It is understood that some inverter compressors are mainly based on permanent magnets, and the profits are relatively high. However, pure ferrite cannot achieve the corresponding performance at all, so the ferrite added with rare earth is needed to realize the inverter compressor. Performance, but the shortcoming of this product is that the performance is slightly worse and larger, although the cost is lower, but in today's quality competition, product stability and after-sales are the most valued by consumers, not just the price, so The introduction of new energy efficiency standards will be beneficial to the increase in the penetration ratio of NdFeB in inverter compressors. However, how to improve the energy efficiency ratio will continue to pay attention.
So what about the use of rare earth permanent magnets in the field of home appliances? As we all know, rare earth permanent magnets are used in the field of frequency conversion of home appliances, such as variable frequency rotor compressors and scroll compressors. It is understood that in inverter compressors, the permeability of neodymium iron boron is only about 46%, and most of the rest (54 About %) is still using ferrite.
The mainstream grades of NdFeB used in compressors are mainly products of 48SH and above, such as 48SH, 38UH, 38EH, etc.; these brands are currently priced between 320-390 yuan/kg, assuming 0.12 on each compressor. Kg of NdFeB, the market price is between 38-47 yuan. For ferrite, the price is only 6-8 yuan / kg, its amount is several times the amount of NdFeB, the price is up to 10 yuan, far cheaper than NdFeB, but the use of ferrite will lead to increased compressor volume This will increase the amount of other raw materials such as steel, copper, refrigerant, etc., and will also increase the cost of raw materials.
The most important thing is that the maximum intrinsic coercivity of permanent ferrite is only about 5.2 Koe, and the maximum magnetic energy product does not exceed 5.2 Koe. However, the coercive force and magnetic energy product of the lowest grade NdFeB in the inverter compressor are At 19Koe and above 36Koe, the performance of ferrites simply cannot meet the current first- and second-level energy efficiency standards. According to the industry's online understanding, the new energy efficiency standards will be introduced, and the old 1 to 3 products will be changed to 1 to 5 products. The new energy efficiency standards are basically variable frequency products, and the air conditioning energy efficiency requirements are further. Improvement, it is likely that the ferrite performance will not be further matched, so NdFeB will become the mainstream in the field of inverter air conditioners.
It is understood that some inverter compressors are mainly based on permanent magnets, and the profits are relatively high. However, pure ferrite cannot achieve the corresponding performance at all, so the ferrite added with rare earth is needed to realize the inverter compressor. Performance, but the shortcoming of this product is that the performance is slightly worse and larger, although the cost is lower, but in today's quality competition, product stability and after-sales are the most valued by consumers, not just the price, so The introduction of new energy efficiency standards will be beneficial to the increase in the penetration ratio of NdFeB in inverter compressors. However, how to improve the energy efficiency ratio will continue to pay attention.
