Automatic cooling outdoor cabinet

Abstract

The invention relates to an automatic cooling outdoor cabinet, and belongs to the technical field of distribution cabinets. The automatic cooling outdoor cabinet comprises a cabinet body (1), a door (2), an electrical apparatus element mounting plate (3) in the cabinet body, and a semiconductor refrigerator arranged on the top part of the cabinet body, wherein a bottom plate, a side plate and a back plate of the cabinet body and the door (2) are formed by assembly and welding of two layers of steel plates; a thermal insulation asbestos (4) is filled between plate layers; a mirror surface aluminum film layer is pasted on the surface of the inner-layer steel plate; the electrical apparatus element mounting plate (3) is provided with a plurality of return-air holes (5); and a ventilation duct (6) is naturally formed among the electrical apparatus element mounting plate (3), the bottom plate and the back plate of the cabinet body. The semiconductor refrigerator mainly comprises a hot end radiator, a semiconductor refrigerating block (9) and a cold end heat-exchange fin (10) arranged from top to bottom in turn. According to the automatic cooling outdoor cabinet, a heat end radiating structure of the semiconductor refrigerator and the air convectional circulation environment in the cabinet are skillfully improved, so that electronic apparatus elements in the outdoor cabinet can work stably.

Description

technical field [0001] The invention relates to a power distribution cabinet, in particular to an automatic cooling outdoor cabinet which can automatically cool down when the temperature of the power distribution cabinet is too high. Background technique [0002] The distribution box is an electrical equipment that assembles various electrical components in a box. It is generally installed outdoors. Due to the influence of the external ambient temperature and the heating of its own components, the switch in the distribution box will frequently trip in the summer high temperature season. It affects the reliability of power supply, and the measures we have taken at present are: using small mechanical fans for ventilation and cooling, which achieves the purpose of cooling through forced ventilation and heat dissipation of fans. Or there are cooling holes on the cabinet body of the power distribution cabinet to achieve the purpose of cooling. These technologies all have low hea...

AI Technical Summary

Problems solved by technology

These technologies all have low heat dissipation efficiency, uneven temperature in the cabinet, and need to leave vents at the same time, which is easy to cause dust to enter and reduce the working reliability of the equipment in the power distribution cabinet; in addition, the forced ventilation of the fan is prone to failure due to long-term operation question

Due to the above problems, when in use, it is often only an alarm for excessive temperature, and the staff will carry out maintenance after receiving the alarm signal, which is not efficient

[0003] On October 7, 2009, the Chinese utility model patent authorization announcement number CN 201323418Y disclosed a self-cooling distribution box, and a cooling radiator was installed on the top of the distribution box. The cooling radiator included a hot end axial flow fan, a semiconductor The refrigeration module and the cold-end axial fan are installed sequentially from top to bottom. Although this patent proposes a cooling measure for the semiconductor refrigeration module, due to the characteristics of the semiconductor refrigeration module, the temperature difference between the hot end and the cold end of the semiconductor refrigeration module cannot be too large. When the temperature difference exceeds 40°C, the energy efficiency ratio will be less than 1. That is to say, when the ambient temperature is relatively high, such as in hot summer, the cooling capacity of the cooling radiator becomes worse and worse.

The electrical equipment and components in the distribution box used to realize the purpose of the invention have the largest workload at this time, and need to be cooled. Therefore, this structure is likely to affect the safe operation of the electrical equipment, so it is not suitable for use in electrical equipment. widely used in

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