Why do ion fans use tungsten needles?
As the name suggests, tungsten needle is a product of transition metal tungsten. With its excellent physical and chemical properties, it has become one of the most popular discharge needles in modern times.
The discharge needle is one of the most important parts in the ion fan. In addition to being polluted after working for a long time, it will affect the static electricity removal effect and ion balance of the fan, and its quality will directly affect the static electricity removal performance of the fan. At present, the widely used discharge needles are stainless steel needles and tungsten products. Compared with tungsten discharge needles, although stainless steel needles have the advantage of lower price, their wear resistance, oxidation resistance and corrosion resistance are far inferior to tungsten discharge needles.
The working environment of the discharge needle is relatively harsh. Under normal circumstances, it is applied with a voltage of 4kV or higher (2-3kV high-frequency AC mode), so the tip of the discharge needle needs to bear a very large energy load, which is to cause the product to be easily damaged and shorten the service life. The main reason for the shortness.
In response to the above problems, current manufacturers prefer to use inorganic metal tungsten as the discharge needle of the ion fan. Tungsten is a refractory metal with a melting point between 3390°C and 3430°C, and the needle end products made of it not only have good high temperature resistance, wear resistance and chemical stability, but also have excellent Conductivity, higher strength, greater hardness, non-radioactive and more friendly to the ecological environment and other advantages.
Therefore, compared with stainless steel needles, tungsten needles are more suitable as discharge needles. In addition to ensuring a longer service life, they can also make the related fans better in removing static electricity, thereby effectively improving work efficiency. It is worth mentioning that the discharge needle is made of metal germanium, nickel, titanium and other materials.