The air-conditioning industry, which has been advancing rapidly in 2017, faces new challenges in 2018. According to a series of data released by Avi Cloud (AVC), from the end of 2017 to the beginning of 2018, air-conditioning sales showed a slowdown in year-on-year growth. Combined with factors such as real estate regulation, capacity expansion and increased competition, the air-conditioning industry in 2018 Enter the adjustment period.
According to data from Avi Cloud (AVC), the total retail sales of air conditioners in the first quarter of 2018 was 33.9 billion yuan, up 14.9% year-on-year, and the retail volume was 9.15 million units, up 9.5% year-on-year. In March, the trend of January-February was lifted. The overall market volume has risen, but the year-on-year growth rate of retail sales in the first quarter of 2017 has declined.
From the data of the first quarter of 2018, although the air-conditioning industry achieved a good start, compared with the growth rate of the same period last year, the growth rate of the industry declined. From the perspective of regional markets, the impact of real estate regulation on the demand of first-tier cities appeared, Beijing, Shanghai, Guangzhou The cities in the first quarter saw a year-on-year decline. On the contrary, the main growth areas were concentrated in the second and third tier regions, especially those with lower 100 household ownership. From the perspective of brand structure, the pressure of leading brands on second and third tier brands is increasing day by day, top3 brand concentration Continue to improve. In order to seize more market share, the average price increase of second-line brands is smaller than that of first-line brands. Compared with other household appliances, the price increase is slow, and the competition in the air-conditioning follow-up market is more intense.
Semiconductor Fuse And Ferrite
Fuse refers to an electric appliance that, when the current exceeds the specified value, melts the fuse and disconnects the circuit with the heat generated by itself.When the current exceeds the specified value for a period of time, the fuse melts and disconnects the circuit with the heat generated by the fuse itself.A current protector made from this principle.The fuse is widely used in high and low voltage power distribution system and control system as well as power equipment.
Ferrite is a metal oxide with ferrous magnetism.As far as electrical properties are concerned, the resistivity of ferrite is much larger than that of single metal or alloy magnetic materials, and it has higher dielectric properties.Ferrite magnetic energy also shows high permeability at high frequencies.As a result, ferrite has become a non-metallic magnetic material widely used in the field of high frequency and weak current.Due to the low ferrite magnetic energy stored in the unit volume, saturated magnetic induction strength (Bs) and low (usually only pure iron 1/3 ~ 1/5), and thus limits its higher requirements in the low-frequency magnetic energy density in the field of high voltage and high power applications.
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