Combiner box and door thereof

Abstract

The invention relates to a combiner box and a door thereof. The combiner box comprises a housing and a door, wherein the front end of the housing is provided with an opening, and the door is arranged at the opening. A ring sealing strip around the periphery of the opening is arranged between the door and the housing. The door comprises a door body. The door body is provided with a ring inturned edge around the periphery of the ring sealing strip. The lower bottom edge of the ring inturned edge is provided with at least one leaking hole penetrating through the lower bottom edge along an up-down direction. When the combiner box is actually used, rainwater may enter through a gap between the ring inturned edge and the housing, and then flows to a gap between the lower bottom edge and the ring sealing strip. In the combiner box, the lower bottom edge is provided with the leaking hole, the rainwater flowing to the gap between the lower bottom edge and the ring sealing strip leaks out through the leaking hole timely rather than accumulates in the gap, so that even if the sealing performance of the ring sealing strip becomes worse, the rainwater does not infiltrate into the housing through the ring sealing strip, and the service life of electrical elements in the housing is guaranteed.

Description

technical field [0001] The invention relates to a combiner box and its box door. Background technique [0002] As an important part of the photovoltaic grid-connected power generation system, the combiner box's quality is very important. Existing combiner boxes, such as the "combiner box" disclosed in Chinese patent CN203434932U, include a shell with a front side opening and a box door with a cover at the opening position, and the bottom of the shell is used to set a cable gland for threading. , the box door includes a box door body, the box door body is provided with an annular sealing strip for sealing and matching with the casing, the opening position of the casing is located on the inner side of the sealing strip, and an annular rib is arranged, and the box door body is arranged on the side of the annular sealing strip The periphery is provided with an annular inner flange folded backward, and the annular inner flange includes an upper top edge, a lower bottom edge, and...

AI Technical Summary

Problems solved by technology

The problem with the existing combiner box is that there are many and frequent rainstorms in the south, and the rainwater tends to accumulate between the annular inner flange and the sealing strip and cannot be discharged smoothly. After a period of use, the annular sealing strip may be damaged due to aging. The sealing effect gradually deteriorates, so the rainwater accumulated between the annular inner flange and the sealing strip may penetrate into the housing through the annular sealing strip and the annular rib, which will cause the buttons of the measuring board to rust and the bolts in the box to rust. Rust and copper bars in the box are rusted

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