Abstract: An artificial diamond plasma production device has a reaction chamber, a microwave emitting module, and a microwave lens. The microwave emitting module emits a circularly-polarized microwave into the reaction chamber. The microwave emitting module has a polarizing tube, a directing tube, a first waveguide, and a first linearly-polarized microwave source serially connected along a microwave traveling path. The microwave emitting module further has a second waveguide and a first matched load. The polarizing tube is configured to convert a linearly-polarized microwave into a circularly-polarized microwave or the other way round depending on traveling direction of the microwave. The directing tube has a first opening and a second opening which face toward different directions. The first waveguide is connected to the first opening. The first matched load is connected to the second opening via the second waveguide. Therefore, reflected microwave can be channeled out of the reaction chamber.

Abstract: A microwave drying device has a processing box. Two mounting openings are formed on an external mounting wall of the processing box. Two suction partitions are mounted in the processing box and divide an inner space of the processing box into a microwave drying space and two suction spaces. The microwave drying space is located between and connects to the two suction spaces. Multiple channel partitions are mounted in the microwave drying space to form a meandering wave travelling channel. Two opposite ends of the wave travelling channel connect to the two mounting openings respectively. Two microwave emitting modules are mounted on the external mounting wall and emit microwaves toward the two mounting openings respectively. Multiple openings are formed in the processing box such that a film can travel through the processing box. Therefore, drying speed is greatly increased, and the drying device is more compact.

Abstract: The present invention is a microwave heating device and has a microwave guide tube, two microwave transmitting modules, and a transmission module. The microwave guide tube forms a wave travelling path and has at least one conveying opening pair and at least one waveguide plate pair. The at least one conveying opening pair has two conveying openings respectively disposed on two opposite walls of the microwave guide tube along a conveying direction. The at least one waveguide plate pair is disposed in the microwave guide tube and has two waveguide plates parallel with the wave travelling path. The two microwave transmitting modules are disposed on two opposite ends of the microwave guide tube. The transmission module extends through the at least one conveying opening pair along the conveying direction.

Abstract: A microwave drying device has a processing box. Two mounting openings are formed on an external mounting wall of the processing box. Two suction partitions are mounted in the processing box and divide an inner space of the processing box into a microwave drying space and two suction spaces. The microwave drying space is located between and connects to the two suction spaces. Multiple channel partitions are mounted in the microwave drying space to form a meandering wave travelling channel. Two opposite ends of the wave travelling channel connect to the two mounting openings respectively. Two microwave emitting modules are mounted on the external mounting wall and emit microwaves toward the two mounting openings respectively. Multiple openings are formed in the processing box such that a film can travel through the processing box. Therefore, drying speed is greatly increased, and the drying device is more compact.

Abstract: The present invention is an artificial diamond production device. A reaction chamber has a window. The diamond holder has a focus area facing toward the window. The microwave transmitting module is disposed outside the reaction chamber and has a microwave generator, a focusing-lens assembly, and a focusing mechanism. The microwave generator emits the microwave into the diamond holder via the window. The focusing-lens assembly is disposed between the diamond holder and the microwave generator. The focusing mechanism is connected to the focusing-lens assembly and a distance between the focusing-lens assembly and the microwave generator is changed by the focusing mechanism to focus the microwave on the focus area to improve the efficiency of producing artificial diamonds.

Abstract: The present invention is a microwave heating device and has a microwave guide tube, two microwave transmitting modules, and a transmission module. The microwave guide tube forms a wave travelling path and has at least one conveying opening pair and at least one waveguide plate pair. The at least one conveying opening pair has two conveying openings respectively disposed on two opposite walls of the microwave guide tube along a conveying direction. The at least one waveguide plate pair is disposed in the microwave guide tube and has two waveguide plates parallel with the wave travelling path. The two microwave transmitting modules are disposed on two opposite ends of the microwave guide tube. The transmission module extends through the at least one conveying opening pair along the conveying direction.

Abstract: The present invention is an artificial diamond production device. A reaction chamber has a window. The diamond holder has a focus area facing toward the window. The microwave transmitting module is disposed outside the reaction chamber and has a microwave generator, a focusing-lens assembly, and a focusing mechanism. The microwave generator emits the microwave into the diamond holder via the window. The focusing-lens assembly is disposed between the diamond holder and the microwave generator. The focusing mechanism is connected to the focusing-lens assembly and a distance between the focusing-lens assembly and the microwave generator is changed by the focusing mechanism to focus the microwave on the focus area to improve the efficiency of producing artificial diamonds.