Alternating-current power distribution equipment for controlling ventilatory capacity by utilizing thermal expansion and cold contraction

Abstract

The invention relates to the technical field of alternating-current power distribution equipment, and discloses alternating-current power distribution equipment for controlling ventilatory capacity by utilizing thermal expansion and cold contraction, which comprises a power distribution box outer shell, a heat absorption cylinder is fixedly connected to the inner side wall of the power distribution box outer shell, heat absorption fins are fixedly connected to the outer side wall of the heat absorption cylinder, the heat absorption cylinder is filled with mercury, and the inner side wall of the heat absorption cylinder is in sliding connection with a sealing sliding plate. The sealing sliding plate drives the air blocking disc to move inwards, so that the number of ventilation holes in the ventilation barrel communicated with the interior of the distribution box is reduced, the entering amount of dust is reduced, meanwhile, in the back-and-forth moving process of the air blocking disc, a brush on the outer side of the air blocking disc rubs with a brush ring in the ventilation barrel back and forth to generate static electricity, and static electricity on the brush ring is enabled to perform electrostatic adsorption on tiny particles, so that the entering amount of dust is further reduced, the ventilation quantity of the alternating-current power distribution equipment is flexible and variable, the heat dissipation efficiency of the equipment can be improved, and excessive dust can be prevented from entering the equipment.

Description

technical field [0001] The invention relates to the technical field of AC power distribution equipment, in particular to an AC power distribution device that uses thermal expansion and cold contraction to control ventilation. Background technique [0002] AC power distribution equipment is used to connect power supply, transformer, converter equipment and other loads, and monitor and protect the power supply system. It has the control functions of connecting, disconnecting, converting, and realizing the specified operation mode between the power supply and various loads, such as protection, measurement, alarm, and power factor compensation, among which the AC power distribution cabinet is one of the AC power distribution equipment One of the most important devices. [0003] In the prior art, the AC power distribution cabinet usually adopts cooling holes for heat dissipation. However, the ventilation volume of the cooling holes cannot be adjusted according to the heat inside...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an AC power distribution device that uses thermal expansion and cold contraction to control the ventilation rate, which can automatically adjust the ventilation rate according to the heat in the box, so that the heat in the box can be dissipated in time, and effectively avoid Dust enters and when the temperature in the box continues to be too high, carbon dioxide is ejected to vaporize the liquid carbon dioxide to absorb heat and reduce the surrounding temperature. If the hole design is too large, it will easily cause dust to enter the box; if the design is small, the ventilation volume will be insufficient, which will affect the heat dissipation in the box. The problem of the service life of the internal device

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