Abstract: The present invention relates to the field of heat exchange technology, specifically to a composite process and system for producing a profiled microchannel plate heat exchanger. This process integrates selective laser melting additive manufacturing with micro electrical discharge machining to create microchannel plate heat exchangers featuring large aspect ratio flow channels and closed profile section flow channels. It enables the fabrication of channels with various cross-sections, such as circular and rectangular, as well as hollow closed profile section flow channels, including micro circular and square holes. The process allows for high-precision machining of microchannels with any aspect ratio. Heat exchangers produced using this composite process can endure extreme high temperatures and pressures, offering superior environmental benefits and contamination-free performance compared to conventional microchannel heat exchangers.

Abstract: The present invention relates to the field of printed circuit heat exchangers, and in particular, to a modular square-circular composite channel printed circuit heat exchanger. The modular square-circular composite channel printed circuit heat exchanger comprises a shell, wherein the shell is divided into an inlet diverter section, a first parallel heat exchange section, a core heat exchange section, a second parallel heat exchange section, and an outlet combiner section from left to right, a plurality of square fin channels and circular micro-channels are uniformly arranged in the shell along a length direction of the shell. According to the present invention, a ratio of an average thermal resistance of a hot side to an average thermal resistance of a cold side is close to 1, which ensures the heat exchange efficiency while taking into the account structure safety and prevents the local over-temperature.

Abstract: The present invention relates to the field of printed circuit heat exchangers, and in particular, to a modular square-circular composite channel printed circuit heat exchanger. The modular square-circular composite channel printed circuit heat exchanger comprises a shell, wherein the shell is divided into an inlet diverter section, a first parallel heat exchange section, a core heat exchange section, a second parallel heat exchange section, and an outlet combiner section from left to right, a plurality of square fin channels and circular micro-channels are uniformly arranged in the shell along a length direction of the shell. According to the present invention, a ratio of an average thermal resistance of a hot side to an average thermal resistance of a cold side is close to 1, which ensures the heat exchange efficiency while taking into the account structure safety and prevents the local over-temperature.

Abstract: A one-piece test apparatus for steel furrings and accessories for building comprises support legs, a rectangular frame on the support legs, and a first hoisting motor, a load-carrying hoisting motor, a second and a third hoisting motor sequentially arranged above the rectangular frame. The overall frame is raised by means of the cooperation of long support legs with the frame, and motors are used for hoisting a wall furring and impact sand bags, so that a tester can mount a dial indicator conveniently and does not need to perform operation and reading by lying on the floor.

Abstract: The invention provides a one-piece test apparatus for steel furrings and accessories for building. The apparatus comprises support legs, a rectangular frame on the support legs, and a first hoisting motor, a load-carrying hoisting motor, a second and a third hoisting motor sequentially arranged above the rectangular frame. One side-edge beam is provided on the rectangular frame. Locking holes are opened on the first short edge and the side-edge beam respectively. The side-edge beam is connected with a long edge of the rectangular frame through a adjustment fixing hole. At least two parallel bearing crossbeams are arranged on the rectangular frame. A hanging plate is provided on a side surface of the bearing crossbeam, and an erection hole is formed in the middle of the hanging plate. The apparatus of the invention is simple in structure and convenient to operate, and has relatively accurate detection data.