Abstract: An outdoor electric cabinet and an air duct structure thereof are provided. The air duct structure is used to guide airflow to an air inlet side of a fan. The air duct structure includes an air inlet port, a flow-guiding cavity and an air distribution assembly. The air inlet port is configured to introduce external airflow into the air duct structure. The flow-guiding cavity is formed between the air inlet port and the air inlet side of the fan. The air distribution assembly is arranged in the flow-guiding cavity to uniformly distribute an air suction force of the air inlet port. The airflow suction force at the air inlet port is distributed more uniformly by the air distribution assembly, which effectively weakens the maximum wind speed on the shortest path.

Abstract: An isolated power converter and a hydrogen production system are provided. An electrical connection structure in the isolated power converter includes N secondary winding output bus bars, N rectifier circuit input bus bars, and a positive-negative bus bar, where N is greater than or equal to 1. A secondary winding may include M tapping points, and the secondary winding output bus bar and the rectifier circuit input bus bar that correspond to the secondary winding each include M copper bars that are insulated and stacked. The M tapping points of the secondary winding overlap the M copper bars of the secondary winding output bus bar at input ends of the M copper bars, respectively. The positive-negative bus bar includes two copper bars that are insulated and stacked.

Abstract: A case heat dissipation structure is provided, which includes a case, a heat exchange assembly and a fan assembly. The case has a first heat dissipation chamber and a second heat dissipation chamber that are communicated with each other, and multiple heat sources are mounted in the first heat dissipation chamber and the second heat dissipation chamber, a liquid inlet for cooling liquid to flow in and a liquid outlet for cooling liquid to flow out are provided on the case. The heat exchange assembly is mounted in the first heat dissipation chamber, the heat exchange assembly comprises a heat exchanger, which is arranged between the liquid inlet and the liquid outlet. The fan assembly is mounted in the first heat dissipation chamber or the second heat dissipation chamber, and is used for driving the air in the first heat dissipation chamber and the second heat dissipation chamber to circulate mutually in operation.

Abstract: An isolated power converter and a hydrogen production system are provided. An electrical connection structure in the isolated power converter includes N secondary winding output bus bars, N rectifier circuit input bus bars, and a positive-negative bus bar, where N is greater than or equal to 1. A secondary winding may include M tapping points, and the secondary winding output bus bar and the rectifier circuit input bus bar that correspond to the secondary winding each include M copper bars that are insulated and stacked. The M tapping points of the secondary winding overlap the M copper bars of the secondary winding output bus bar at input ends of the M copper bars, respectively. The positive-negative bus bar includes two copper bars that are insulated and stacked.

Abstract: A case heat dissipation structure is provided, which includes a case, a heat exchange assembly and a fan assembly. The case has a first heat dissipation chamber and a second heat dissipation chamber that are communicated with each other, and multiple heat sources are mounted in the first heat dissipation chamber and the second heat dissipation chamber, a liquid inlet for cooling liquid to flow in and a liquid outlet for cooling liquid to flow out are provided on the case. The heat exchange assembly is mounted in the first heat dissipation chamber, the heat exchange assembly comprises a heat exchanger, which is arranged between the liquid inlet and the liquid outlet. The fan assembly is mounted in the first heat dissipation chamber or the second heat dissipation chamber, and is used for driving the air in the first heat dissipation chamber and the second heat dissipation chamber to circulate mutually in operation.