Anti-condensation device for urban distribution network cabinet, and working method thereof

Abstract

The invention relates to an anti-condensation device for an urban distribution network cabinet, and a working method thereof, belonging to the technical field of power distribution equipment. The anti-condensation device for the urban distribution network cabinet comprises a device body; at least one condensation channel is arranged in the device body; a push rod is arranged in the channel; a push head is arranged at one end of the push rod; the other end of the push rod is connected with a motor; a semiconductor refrigeration thermoelectric slice is arranged outside the cavity of the condensation channel; the refrigeration surface of the semiconductor refrigeration thermoelectric slice is connected with the surface of the cavity of the condensation channel; and the semiconductor refrigeration thermoelectric slice is connected with an external power supply. After the semiconductor refrigeration thermoelectric slice is electrified, the temperature of the surface of the cavity of the condensation channel near the refrigeration surface is reduced; according to the principle that wet hot air can be condensed while being cooled, at this time, wet hot air in an environment can form condensed dews on the inner wall of the condensation channel; the motor drives the push rod to drive the push head to collect the condensed dews; wet hot air is condensed into water and discharged out of a cabinet; therefore, the relative environment humidity is reduced; and the interior of an electric cabinet is really kept dry.

Description

technical field [0001] The invention relates to an anti-condensation device and a working method for an urban distribution network screen cabinet, belonging to the technical field of power distribution equipment. Background technique [0002] The invention relates to the internal environment of the network distribution screen cabinet in an urban area mainly including dehumidification control to prevent the formation of condensation inside the distribution network screen cabinet. [0003] Urban distribution network screen cabinets mainly include 10kV ring network cabinets, cable branch boxes, high-voltage switch cabinets in switching stations and power distribution rooms, and distribution automation device cabinets. The space in the screen cabinets is compact, including primary switchgear, secondary control Loop system and power distribution automation terminal unit module. [0004] Accidents caused by condensation inside the distribution screen cabinet generally occur in th...

AI Technical Summary

Problems solved by technology

[0005] ①The humidity is high in the area, the climate temperature changes greatly, the bottom of the switchgear is humid, and some cable trenches even have water;

[0006] ② Some switchgears are located in the basement, the humidity is high, and the temperature inside the cabinet, especially the temperature close to the ground, is lower than the ambient temperature;

[0007] ③ Some equipment is temporarily out of operation, and the temperature of the small environment inside the electric cabinet is lower than that of the surrounding environment, and condensation is easily formed on the surface. In this case, once the power transmission is put into operation, the accident will follow

[0008] Chinese patent document 201520666824.2 (notification number CN204947375U) discloses a dehumidifying power distribution box, including a power distribution cabinet body, the left and right sides of the power distribution cabinet body and the bottom of the bottom side panel are provided with several through holes, The bottom of the outer side panel of the power distribution cabinet body is provided with an open panel, and there is a handle on the panel, and several crosspieces are provided on the bottom cavity of the power distribution cabinet body, Several incandescent lamps are arranged on the crosspiece, and the switches of the incandescent lamps are arranged on the panel; this device requires the baking of the incandescent lamps and the dehumidification of the vents, which has low efficiency and is not suitable for The improvement of the existing screen distribution cabinet is not conducive to promotion

[0009] Chinese patent document 201520999710.X (notification number CN205248661U) discloses a power distribution cabinet that can dissipate heat and dehumidify. The inside of the base is a hollow cavity, and the bottom right side of the hollow cavity is provided with a water inlet pipe connected to the water inlet. , there is sound-absorbing cotton in the hollow cavity, and the top of the hollow cavity is evenly arranged with ventilation holes; there are exhaust windows on the top of the two side walls of the power distribution cabinet, and one of the exhaust windows is equipped with a dehumidifier. Fan, another exhaust window is provided with a sponge block; the base is provided with a humidity controller, the humidity controller is connected to the controller through a connecting line, the controller is connected to the control valve through a connecting line, and the A hollow cavity that can store water is set under the electric cabinet, and the temperature of the power distribution cabinet is lowered through ventilation, and the excess moisture in the power distribution cabinet is removed through the dehumidification fans and sponge blocks arranged on both sides of the power distribution cabinet. , but the dehumidification efficiency is low, the installation is complicated, the changes to the distribution cabinet are relatively large, and most of the moisture still stays in the distribution cabinet

The air circulation is enhanced by opening holes on both sides of the screen cabinet, and the effect of reducing the temperature difference is poor. The operation equipment needs to be modified, and the feasibility is not high; the method of strengthening the bottom of the screen cabinet is better in dehumidification, but the cement is easy to dry and crack. , the construction is complicated, and there are major changes to the built-up operating equipment; the principle of heating and dehumidification is mainly used to accommodate more water vapor under high temperature conditions, but the moisture still remains in the cabinet. If the external environment cools down significantly, the moisture will still Precipitate to form condensation

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