Dielectric drying system leakage protection device can

    When a high frequency and microwave radiation on the organism when its physiology is influential, which is their role in human health but also have a certain influence. This effect is mainly reflected in a part of energy is converted into kinetic energy of molecules (less than 1GHz and above 3GHz frequency microwave energy is absorbed by the organism ratio of 20% -100%, the absorption rate with the frequency characteristics of the living tissue and varies). Thermal effects, temperature, heating the organism's tissues and organs, physiological effects on organisms and harmful effects. Microwave thermal effects on the organism through its reflected temperature. Note that in this process, since the surface of the living body heat faster, and subcutaneous tissue deep cooling steamed bread, so the skin feel the pain in the case of deep tissue may have been burned. In addition, the microwave radiation will also produce non-thermal effects, which can not be explained by thermal effects specific physiological effects on organisms. As early as 1979, China promulgated Ding "microwave radiation health standards." In the dielectric drying process should earnestly follow safety standards. Dielectric drying system designer should be reasonably designed and installed using a dielectric dryer, to ensure safety.

    Frequency equipment can be enclosed cabinet, such as the use of the entire high-frequency oscillator aluminum enclosure sealed up and set outside the box iron cabinets. Thus forming double-layer metal structure, you can achieve good shielding effect. In particular, the work of the system frequency drying capacitors are high-frequency electromagnetic energy radiated the main part, can be shielded metal mesh or a metal plate, metal mesh or metal shell and well grounded.

    As the need for production operations, often with holes microwave dryer, doors, import / export, etc., so inevitably there is no gap. Should be set in place to prevent the leakage of microwave energy device.

    In the magnetron, for example, the cathode electrode can be a serious leak, it can shield shielding, i.e. the height of the cathode for the ceramic tube with 1/4 length of the choke. Furthermore, the right door choke based sauce, suppressors, 1/4 wavelength on a short route or routes; high-power microwave dryer, a metal mesh or a metal plate, the microwave dryer and separated from the operator.

    (1) choke doors between the door and the oven door frame, due to the long opening and closing metal contact wear births bad, will make the gap between the door and frame to increase, resulting in leaky wave, it is in between the door and the door frame choke structure, into - further suppress the leakage of microwave energy. "

    (2) Electrical resistance Electrical resistance suppressor suppressor into comb plate, cylindrical array, Islands style and so on.

Comb-shaped plate and the cylinder is approximately equal to the height of 1/4. The principle is: the electromagnetic channel, there is a series branch, the branch's role is to force the main channel disconnected. The comb-like structure or a cylindrical array structure can TEM wave excitation, which can be the main channel in any of the wave are inhibited. Such a structure, usually made of an array, repeatedly suppressed, control of exposure to the energy at a very low level.

 

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