Abstract: Disclosed is a garbage bin, which includes a main body and a filter component. The main body is provided with an opening. The filter component is detachably provided on the opening to close the opening. The main body is further provided with a water inlet. The filter component is detachably provided on the opening, the opening is not only configured to drain water during operation but also configured to pour garbage after operation, thus, it is unnecessary to provide another window for cleaning the garbage, thereby beneficially reducing the processing difficulty; in addition, after the filter component is disassembled, cleaning of a worker for an inside of the garbage bin and the filter component may be further facilitated, thereby improving the cleaning efficiency.

Abstract: The invention relates to a device (1) comprising at least one rechargeable battery (2) and an electric converter associated with said battery, which converter is connected to a superordinate system. The electric converter is designed to draw or feed electrical energy from/to the rechargeable battery (2). Characteristic variables of the rechargeable battery are determined by means of the electric converter during operation of the battery. Alternatively or additionally, means for influencing the operating mode of the rechargeable battery (2) are provided.

Abstract: Disclosed a hole plate rack capable of adjusting a distance between a plant root system and a nutrient solution level. Height adjustment structures are added on both sides of the hole plate rack to adjust the distance between a seedling root system and the nutrient solution level. The height adjustment structures are designed on both sides of the hole plate rack, and include grooves dug in both sides of the hole plate rack, and height cushion blocks. Inner walls of the grooves are provided with height cushion block separators. The height cushion blocks are rotatably connected into mounting holes in the inner walls of the grooves through plug pins, and are rotated to different positions to realize height adjustment.