Automatic dust removal method and device for protective net of strong ventilation device

Abstract

The invention discloses a method and device for automatically removing dust of a protective screen of a forced draft device. A power source phase-changing device is in series connection with a power source circuit of a fan motor of the forced draft device in each industrial factory so that the phase sequence of the power source of the fan motor can be changed and the fan motor can rotate reversely for a short time, and therefore the air blowing direction of the fan motor is changed and collected dirt, dust and sundries adsorbed to the protective screen of the forced draft device can be blown out. According to the method and device, the environment condition of use of the forced draft device is comprehensively considered, on the premise that normal operation of the forced draft device is guaranteed, the collected dirt, the dust, the sundries and the like on the protective screen of the forced draft device are automatically cleaned, regular manual cleaning is not needed, the maintenance workload is reduced, the draft efficiency of the device is kept, the temperature, the humidity, the cleanness of air and the like in each industrial factory can satisfy the requirements for environmental work conditions of work of workers or operation of various devices, overload running of the fan motor of the device is prevented, electric energy loss is reduced, and the service life of the device is prolonged.

Description

technical field [0001] The invention belongs to the technical field of forced ventilation devices, and in particular relates to an automatic dust removal method and device for a protective net of a forced ventilation device. Background technique [0002] In many large industrial plants, in order to ensure good ventilation and meet the environmental requirements of employees' work or the operation of various equipment, a certain number of strong ventilation devices are usually installed in the plant. To connect the indoor and outdoor air, in order to improve the ventilation efficiency, it is necessary to install a fan motor in the air duct for strong ventilation. There are two installation methods for the blowing direction of the fan motor: blowing to the indoor and outdoor, and the two installation methods coexist in the factory building that requires a large amount of ventilation. It is necessary to ensure a clean environment in the factory building. In order to prevent for...

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Problems solved by technology

[0002] In many large industrial plants, in order to ensure good ventilation and meet the environmental requirements of employees' work or the operation of various equipment, a certain number of strong ventilation devices are usually installed in the plant. To connect the indoor and outdoor air, in order to improve the ventilation efficiency, it is necessary to install a fan motor in the air duct for strong ventilation. There are two installation methods for the blowing direction of the fan motor: blowing to the indoor and outdoor, and the two installation methods coexist in the factory building that requires a large amount of ventilation. It is necessary to ensure a clean environment in the factory building. In order to prevent foreign objects such as small animals and sundries in the atmospheric environment from entering the room, affecting the work of employees or endangering the safe operation of equipment, protective nets with many gaps must be installed on both sides of the air duct. The size depends on the actual demand; and in the actual operation of the ventilation device, the sundries, dust, dirt, etc. in the air are adsorbed to the air inlet side of the protective net due to the wind force of the fan motor, and even large attachments, such as plastic Films, newspaper pieces and other foreign objects will cause partial blockage, seriously affecting its ventilation and heat dissipation efficiency, and regular cleaning is required to meet the needs of the plant; if the protective net is blocked seriously, not only the ventilation in the plant will be insufficient, but the indoor temperature will rise abnormally , affecting work efficiency and equipment operation, it may also cause high load, overload or even high temperature operation of the fan motor, and a large number of open ventilation devices will increase power consumption and affect its service life

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