Abstract: A crystal growth doping apparatus and a crystal growth doping method are provided. The crystal growth doping apparatus includes a crystal growth furnace and a doping device that includes a feeding tube inserted to the furnace body along an oblique insertion direction, and a storage cover and a gate tube that are disposed in the feeding tube. The feeding tube extends from an outer surface thereof to form a placement opening, and the placement opening is recessed from an edge thereof to form an upper recessed portion and a lower recessed portion along the oblique insertion direction. The storage cover includes a storage tank and a handle. When the storage cover is disposed in the gate tube body, the gate tube body is configured to isolate an inner space of the feeding tube from the placement opening.

Abstract: The present invention provides a boiler structure, for use with a coffee machine and capable of automatic depressurization, comprising a lid, a sealing member, a boiler body, and a position-limiting support frame. The lid is configured with a water inlet pipe and a water outlet pipe and the water outlet pipe. The sealing member is fitted in an inner side of the lid and having a pressure relief ring, wherein the pressure relief ring has one or a plurality of pressure relief apertures at a pressure relief height. The boiler body is on one side of the lid, wherein the boiler body comprises a receiving space and an opening. The receiving space is in communication with the water inlet pipe and the water outlet pipe, and the opening is on one side of the receiving space. A heating device is on one side of the boiler body. The boiler body is movable downward by pressure while being heated by the heating device; and, when the opening of the boiler body reaches the pressure relief height, the pressure is relieved.