What are the applications of high frequency heating heads?
The rapid development of modern industry has also burst into vigorous vitality. We build a lot of things with industrial technology. Hot welding, smelting, etc. forge cutlery and various electrical accessories that are closely related to our lives. But who has thought about how these things are made. Which technologies are used. Now let's introduce the high-frequency heating head, an important means to accomplish these tasks. High-frequency heating head High-frequency heating device The high-frequency heating device adopts the principle of magnetic field induction eddy current heating, and uses current to pass through the coil to generate a magnetic field. When the magnetic field lines in the magnetic field pass through the metal material, the boiler body itself heats up at a high speed, and then heats the material, and Satisfactory temperature can be reached in a short time. Kehua reminds you that the main advantages of this product are magnetic heating, energy saving, environmental protection, zero emission, unattended operation, separation of water and electricity, no scaling in the pipeline, no open flame, easy operation, safety and reliability, durability, clean and environmental protection, easy installation, appearance Beautiful, widely used, no noise, odor, open circuit, no explosion hazard at all. It has multiple intelligent protections such as preventing overheating, no electricity leakage, preventing water shortage, preventing dry burning, preventing undervoltage, preventing overvoltage, preventing freezing, automatic high temperature heat storage at night when electricity is low, and has many advantages such as no oil fume and no heat radiation. The use of backwater to control the large-kilometer radiator for heat dissipation can make full use of the recovered heat source to improve thermal efficiency and adapt to various harsh environments. Application of high-frequency induction heating equipment High-frequency induction heating equipment has been widely used, and the frequency range is 20}}-450 kHz, and the high-frequency power can reach 400 kW. Kehua tells you that high-frequency induction heating equipment is mainly used in metal heat treatment, 'quenching, diathermy, melting, brazing, straight seam steel pipe welding, degassing heating of electric vacuum devices, semiconductor material refining, plastic heat sealing, baking and purification, etc. . The high-frequency induction heating equipment used in our province now uses high-power vacuum tubes (emission tubes) as the core to form a single-stage self-excited oscillator, which converts high-voltage direct current energy into high-frequency alternating current energy. About 75 rings, the overall efficiency of the equipment is generally below 50 velvet, and the consumption of water and electricity is very large. Since the mid-1970s, a series of improvements have been made to high-frequency equipment (1) Replace the old-fashioned pure tungsten filament series electron tubes with energy-saving tungsten tobacco tubes, such as FV-911 instead of FV-433 } FV-431, FV-89F tubes Wait. (2) Use high-voltage silicon stack rectifier instead of thyratron rectifier. (3) Use high-power bidirectional thyristor combined with microcomputer voltage regulation to replace the original thyratron voltage regulation. (4) Re-change the oscillation circuit according to the respective process conditions, and select a reasonable oscillation frequency. In this way, after a series of transformations, the total power efficiency of the high-frequency equipment in our province has been improved to a certain extent, and it has a certain effect in energy saving. Aspects, not particularly significant. The development of electronic technology for all-crystal high-frequency induction heating equipment can be described as changing with each passing day. In the early 1980s, Japan first improved the semiconductor production process, developed and produced a field-controlled power electronic device - high-power electrostatic induction transistor (SIT), and designed it into a commutator bridge type, which converts direct current energy into high-frequency energy. Transistorization High-frequency induction heating equipment was also rapidly developed by developed countries such as the United States and West Germany, which soon became commercialized. Feature edit At present, the advantages of induction heating with electrostatic induction transistor high-frequency heating head Electromagnetic induction heating is a major reform of the direct heating method following the combustion of wood, liquefied gas, natural gas, and diesel to generate thermal energy and current-carrying resistance thermal effect. Compared with traditional resistance furnace and flame furnace direct heating, induction heating has obvious advantages such as energy saving, environmental protection and safety, specifically. 1. High efficiency. The efficiency of induction heating is 30%-50% higher than that of flame furnace, and it is 20%-30% higher than that of resistance furnace, which has obvious energy saving effect. 2. The heating temperature is high and the time is short, which means the heating speed is fast. It shows that induction heating has higher working efficiency and higher output per unit time than resistance furnace and flame furnace. The heating speed is fast, the surface oxide skin burning rate of the heated metal workpiece is low, and the material and cost are saved, especially for the heating of precious metals. In general, the metal parts are heated by thermoforming, and the metal burning loss rate of induction heating is about 0.5%, and the metal burning loss rate of flame furnace heating is about 1%-3%. That is to say, induction heating saves about 2% of materials than flame heating. 3. It is easy to realize automatic control. Induction heating can perform timely and precise automatic control according to the current state of the workpiece to be heated, such as processing through analog or digital circuits, adjusting the power or frequency, so that the heating temperature or depth of the workpiece can be automatically adjusted to meet the process requirements. The induction heating adjustment is relatively fine, usually by adjusting the phase shift, pulse duty cycle and other parameters to adjust the heating power. Once the heating temperature is determined according to the process requirements, it will be kept at the core temperature constant due to its own negative feedback effect. Realize constant power control. The temperature uniformity is good, the temperature difference can be controlled below 1%, and the qualified rate of product quality is improved. Through the above introduction, we have learned about the relevant content of the high-frequency heating head. I believe that after reading it, you will have a deeper understanding of this, and have a clearer understanding of the source of many things in our lives. For more information, please follow us.