A method for controlling temperature, controlling humidity and preventing condensation in electrical room with cable trench

Abstract

The invention provides a temperature control humidity control anti-condensation method for an electrical room with a cable trench. The electrical room comprises an electrical chamber and the cable trench below the electrical chamber. The electrical chamber is provided with an electrical chamber air inlet and an electrical chamber air outlet. An electrical cabinet is installed above the cable trench. A cable in the electrical cabinet is connected to the cable trench through a cable hole in the bottom of the electrical cabinet. An air conditioning device is used to supply air and comprises at least one air inlet and at least two air supply outlets. A draught fan is installed in the position, between the air inlets and the air supply outlets, inside an air channel. The air inlets are connected with the electrical chamber air inlet. At least one air supply outlet is connected into the electrical chamber, and at least one air supply outlet is connected into the cable trench. The air supply flow of the draught fan is controlled by an intelligent control system. A control signal of the intelligent control system comes from a temperature and humidity sensor. According to the temperature control humidity control anti-condensation method for the electrical room with the cable trench, the temperature and humidity balance of the three spaces in the electrical cabinet, the electrical chamber and the cable trench can be kept, and thus the condensation producing conditions are destroyed.

Description

technical field [0001] The invention relates to the technical field of air conditioning in an electrical room with a cable trench, in particular to a method for avoiding dew condensation and pollution flashover of electrical equipment in the electrical room by means of ventilation. Background technique [0002] At present, in some closed spaces such as underground or ground unattended large transformer stations, substations, high and low voltage switch rooms, etc., it is necessary to adjust the temperature and humidity of the electrical room. For example, in the technology published in 201010243443.5, the controllable small air volume and low-speed airflow is used to supply air at the lower part of the electrical room, and the air is exhausted from the upper air outlet of the electrical room. The low-speed airflow maintains the temperature of the electrical equipment in a certain temperature range. The minimum ventilation and cooling air flow required for heat balance, the t...

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Problems solved by technology

[0003] However, in an electrical room with a cable trench, only the above-mentioned air conditioning method is not enough

In electrical rooms with cable trenches, electrical equipment is often installed in electrical cabinets, and electrical cabinets are generally installed directly above the cable trenches. In some cases, the wet and cold air in the cable trench enters the electrical cabinet, which often leads to condensation on the inner and outer surfaces of the electrical cabinet, and these condensations may lead to short circuits and pollution flashovers. The condensation phenomenon will cause great damage to the electrical system

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