A water-cooled resistor for frequency conversion cabinet and its manufacturing method

Abstract

The invention discloses a water-cooling resistor for a variable-frequency cabinet and a manufacturing method of the water-cooling resistor. The water-cooling resistor comprises an insulation body with a passage, an insulation cover, a resistance band and a lead end, wherein the resistance band is arranged in the passage of the insulation body, the lead end is connected with two ends of the resistance band, the insulation body is also provided with two water gaps, the resistance band comprises a resistance band body and a plurality of lugs, the resistance band body and the lugs are integrated, every two adjacent lugs on each side of the resistance band body are oppositely distributed on the resistance band body in a staggered manner, the lugs are contacted with two inner side walls of the of the passage of the insulation body, so that the resistance band body is vertically buckled onto a central axis position of the passage of the insulation body. The water-cooling resistor is good in cooling effect, simple in structure and convenient to install.

Description

technical field [0001] The invention relates to a water-cooling resistor and a manufacturing method thereof, in particular to a water-cooling resistor used in a frequency conversion cabinet and a manufacturing method thereof. Background technique [0002] In the existing water-cooled resistors, a water flow channel is set in the housing made of insulating material, and the resistance filament is set in the water flow channel. When working, the heat on the resistance filament is taken away by the cooling water flowing in the water flow channel to To achieve the purpose of cooling down. However, the resistance wire in the existing water-cooled resistor tends to deviate from the central axis position of the water flow channel due to the influence of the water flow during work, which will cause the flow of water flowing on the left and right sides of the resistance wire to be different, resulting in the left and right sides of the resistance wire. The heat dissipation on both s...

AI Technical Summary

Problems solved by technology

If this is set up, there are some problems: firstly, in order to fix the resistance band to the axis position in the water-cooled resistance channel, insulating plastic protrusions must be provided on both sides of it, which causes inconvenience in installation; secondly, during the working process, The place where the insulating plastic protrusions are in contact with the resistance band will hinder the flow of cooling water, causing a local temperature rise and affecting the performance of the entire water-cooled resistor; again, when the water-cooled resistance is overloaded with power, the place where the insulating plastic protrusions are in contact with the resistance band is due to If the water flow is not smooth, the local temperature will rise sharply, causing the insulating plastic protrusions to deform or even melt, which will cause the resistance band to not be stably fixed on the central axis of the water-cooled resistance channel, so that the cold water passing through one side of the resistance band The water flow rate decreases, and the resistance band cannot be cooled evenly, which greatly reduces the cooling effect of the entire resistance

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