Radiation type duct fan capable of shielding interference

Abstract

The invention discloses a radiation type duct fan capable of shielding interference. The radiation type duct fan comprises an air duct, a base, a motor and fan blades, wherein the base is arranged inthe air duct and comprises static blades and a fixing ring; the motor is arranged in the fixing ring, and the motor is mainly composed of a fixing base, an iron core arranged on the left side of the fixing base, a magnetic ring arranged on the iron core in a sleeving mode, a motor shell connected to the magnetic ring in a sleeving mode, a main board arranged on the right side of the fixing base and a protective cover used for covering the main board; the motor shell is of a hollow structure with one open end and one closed end, and a heat conduction block is arranged on the protective cover and connected with the main board; and a supporting disc is arranged in the fan blades and is connected to the motor shell in a sleeving mode. According to the radiation type duct fan capable of shielding interference, one end of the motor shell is closed, so that the leakage of the magnetic field of the motor can be effectively prevented, meanwhile, the electromagnetic interference of the motor canbe reduced, and the electromagnetic immunity of the motor is improved; and by arranging the protective cover, the main board can be shielded, meanwhile, the heat conduction block is arranged on the protective cover, so that heat on the main board can be guided out, then the performance of the device is more stable, and the service life is longer.

Description

technical field [0001] The invention relates to the technical field of ventilation equipment, in particular to a radiation-shielding duct fan. Background technique [0002] At present, the electromagnetic compatibility (EMC) of electronic and electrical products is a very important quality index. It is not only related to the working reliability and safety of the product itself, but also may affect the normal operation of other equipment and systems. It is related to the protection of the electromagnetic environment. [0003] EMC certification is a standard for Electro Magnetic Compatibility, which is defined as "the ability of equipment and systems to work normally in their electromagnetic environment without causing unacceptable electromagnetic interference to anything in the environment". This definition includes two aspects the meaning of. First of all, the device should be able to work normally in a certain electromagnetic environment, that is, the device should have ...

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Problems solved by technology

[0004] However, in the current industry, the motor housings of motors are all open, which does not have a good shielding effect on the motor, causing electromagnetic interference to external electronic equipment, and at the same time, it cannot shield the motor itself well from the outside world. Electromagnetic interference; in addition, the open motor casing cannot effectively prevent the magnetic field of the motor from leaking out; moreover, the current motor does not shield the motherboard, and most of them are wrapped with plastic parts, which cannot achieve the effect of shielding the electromagnetic field, and it is easy to Heat generation will affect the performance and service life of the motherboard, and even cause a fire

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