The heat dissipation problem of explosion-proof distribution box is a key issue that needs to be solved due to the fact that all components of the explosion-proof distribution box are installed in explosion-proof chambers, and air cannot flow. We have adopted a new heat dissipation technology here - heat pipe heat dissipation technology.
(1) The principle of heat pipe technology is that a heat pipe is a type of heat transfer element with excellent thermal conductivity. It transfers heat through the evaporation and condensation of the working fluid inside a fully enclosed vacuum tube. It has a series of advantages such as excellent thermal conductivity, good isothermal properties, adjustable heat transfer area on both hot and cold sides, long-distance heat transfer, and temperature control. The heat exchanger composed of heat pipes has the advantages of high heat transfer efficiency, compact structure, and low fluid resistance.
(2) We have designed the main circuit of the frequency converter as a large unit and installed it on the rear wall of the rectangular explosion-proof chamber. The rear wall is connected to heating elements such as IGBT modules and rectifier modules through an excessive heat sink. A groove shaped heat sink is welded to the outer wall of the explosion-proof shell, and the excessive heat sink is connected to the groove shaped heat sink through a heat pipe. The heat generated inside the frequency converter is dissipated through the heat pipe groove shaped radiator on the rear wall of the explosion-proof chamber.