Abstract: A water-cooling structure includes a heat sink, a cover plate, a heat exchange module, a retaining wall, and ribs. The heat sink has an inlet hole, an outlet hole, and an inner space which communicates with the inlet hole and the outlet hole. The cover plate is disposed on the heat sink to seal the inner space. The heat exchange module and the retaining wall are disposed on the cover plate and located in the inner space. The inlet hole and the outlet hole are disposed on different sides of the retaining wall. The ribs are disposed on the cover plate and form flow channels in the inner space. A coolant enters the inner space from the inlet hole, enters the flow channels along the retaining wall to contact the heat exchange module, and flows out of the outlet hole after passing through the heat exchange module.

Abstract: A continuous type wastewater purifying device includes a wastewater tank defining a predetermined level of wastewater received in the wastewater tank. A purifying piping unit is mounted on a base and includes a wastewater pipe, a purified water pipe, and at least one heat conduction pipe having an inlet end and an outlet end respectively connected to and in communication with the wastewater pipe and the purified water pipe. The wastewater pipe has a first height from a mounting portion of the base in a height direction. The purified water pipe has a second height from the mounting portion in the height direction. The second height is greater than the first height. The inlet end and the outlet end of the at least one heat conduction pipe has a height difference therebetween. The outlet end of the at least one heat conduction pipe is higher than the predetermined level.

Abstract: An inrush current restraining circuit (100) includes a power source (Vcc), a charging/discharging circuit (11), a switching circuit (13), a first impedance component (Z1), a second impedance component (Z2), and a controller (10). The charging/discharging circuit is connected to the power source. An input of the switching circuit is connected to the charging/discharging circuit, and an output of the switching circuit is defined as an output of the inrush current restraining circuit. One end of the first impedance component is connected to the power source. The second impedance component is connected between the other end of the first impedance and the switching circuit. The controller is connected a joint of the first impedance component and the second impedance component, for providing a control signal.

Abstract: An inrush current restraining circuit (100) includes a power source (Vcc), a charging/discharging circuit (11), a switching circuit (13), a first impedance component (Z1), a second impedance component (Z2), and a controller (10). The charging/discharging circuit is connected to the power source. An input of the switching circuit is connected to the charging/discharging circuit, and an output of the switching circuit is defined as an output of the inrush current restraining circuit. One end of the first impedance component is connected to the power source. The second impedance component is connected between the other end of the first impedance and the switching circuit. The controller is connected a joint of the first impedance component and the second impedance component, for providing a control signal.