Frequency converter protection device

Abstract

The invention discloses a frequency converter protection device, and particularly relates to the frequency converter field, the frequency converter protection device comprises a frequency converter main body, two sides of the frequency converter main body are fixedly provided with oil immersion side boxes, the top surface of the frequency converter main body is fixedly provided with a cooling oil liquid storage box, and the cooling oil liquid storage box is internally provided with a circulating pump and a refrigeration mechanism; an oil liquid heat dissipation plate is installed on the side face of the oil immersion side box in an embedded mode, a heat exchange cavity is formed in the oil immersion side box, a cooling spraying mechanism is fixedly installed in the heat exchange cavity, and a backflow liquid hopper is fixedly installed on the bottom face of the heat exchange cavity. According to the scheme, the frequency converter main body performs group oil immersion type heat exchange cooling through the oil immersion side boxes attached to the two sides, high-temperature heat exchange of the surface of the frequency converter main body is performed through continuously sprayed oil liquid, group closed type oil liquid circulation cooling is performed through the oil immersion side boxes and the cooling oil liquid storage box, the influence of external airflow is isolated, and the cooling efficiency is improved. And external dust and other impurities are prevented from damaging the cooling mechanism, the service life of equipment is prolonged, and the maintenance workload is reduced.

Description

technical field [0001] The invention relates to the technical field of frequency converters, and more specifically, the invention is a protection device for frequency converters. Background technique [0002] Since the heat generated by the electronic control components and power devices inside the inverter needs to be taken away by air, the existing conventional inverter will reserve many heat dissipation holes in different shapes on the shell structure, and take away the heat generated by the components through air flow. . However, in special environments, such as: steam drying lines in the food industry, deep water wells, metal grinding and polishing, etc., where the air contains a lot of moisture and metal dust, the water and dust will enter through the heat dissipation holes of the inverter casing. The internal circuit of the frequency converter is short-circuited, which can easily cause damage to the frequency converter and increase the cost of the user unit. [00...

AI Technical Summary

Problems solved by technology

However, in special environments, such as: steam drying lines in the food industry, deep water wells, metal grinding and polishing, etc., where the air contains a lot of moisture and metal dust, the water and dust will enter through the heat dissipation holes of the inverter casing. The internal circuit of the inverter is short-circuited, which can easily cause damage to the inverter and increase the cost of the user unit

[0003] Since the hot air may be accompanied by the entry of external cold wind, in order to prevent the external cold wind from carrying dust into the inside of the inverter through the vent holes, dust-proof nets are generally installed at the positions corresponding to the vent holes to prevent dust from entering, but With the prolongation of the working time of the inverter, more and more dust will be attached to the dust-proof net of the inverter. malfunction

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