Abstract: The present invention provides a circumferential frame for attachment to an edge of a photovoltaic module, which utilizes an adhesive method to achieve the attachment between the circumferential frame and the edge of the photovoltaic module without the aids of fastening means and such that the overall weight and size of the frame as well as the supporting stand can be reduced while the load bearing of houses can be reduced and photovoltaic modules of greater sizes or surface areas can be installed for practical purposes.

Abstract: A vacuum recycling apparatus for refining solar grade polysilicon is provided which contains a vacuum degassing (VD) device and a vacuum recycling (RH) device. By storing liquid silicon in a bucket in the VD device, controlling the pressure inside the VD and RH devices, and introducing inert gas into the apparatus, the liquid silicon is stirred for the removal of impurities. With the present invention, solar grade polysilicon can be directly produced with a specified purity, significantly reducing the production time and cost.