The hemispherical dandelion nozzle, also known as the peacock screen opening nozzle, has different structural principles, forms, and screen opening (scattering) nozzles. However, it is basically the same as the dandelion nozzle, with the only difference being that it is hemispherical and sprays water like a semi-circular dandelion or a peacock screen opening nozzle. The requirements for water quality are the same as those for dandelion nozzles, which can be applied to various types of water spray pools.