Air humidity maintaining device for epiphytic cultivation of dendrobium officinale

The utility model discloses an air humidity keeping device for epiphytic cultivation of dendrobium officinale. The air humidity keeping device comprises a support, a main water pipe, branch water pipes, branch water pipes, atomizing nozzles, electromagnetic valves, air humidity sensors, a water pump, a wind direction detector and a microprocessor. The support is composed of four supporting columns and four steel cables, a quadrilateral area is defined by the four supporting columns and the four steel cables, the water distribution pipes are fixedly installed on the two adjacent steel cables respectively, the water distribution pipes are communicated with the main water pipe together, the main water pipe is connected with a water source through the water pump, and the branch water pipes are arranged in the quadrilateral area in a grid shape in an interwoven mode. One end of each branch water pipe is communicated with the water distribution pipe through an electromagnetic valve, the other end of each branch wat