Abstract: Disclosed are a water cooling plate and a water cooling radiator having the same. The water cooling plate includes a main body and a water chamber disposed inside the main body, the water chamber has provided therein a pressure bag, the pressure bag has one end sealed through a sealing plug to form a sealed chamber therein. The water cooling radiator includes a water cooling plate and a water block connected to the water cooling plate. Cooling water inside the water cooling plate is pumped, through a water pump, into the water block to absorb heat, and the heated water is returned to the water cooling plate via a water inlet pipe.

Abstract: The extruded section forms a tunnel that is substantially rectangular and is provided with fins on at least one side of the rectangle. The fins allow air to flow outside the housing by natural convection in the extrusion direction. A side without fins serves as a base for fastening the housing and as a support for power electronic components of the power electronic device. The fins are machined transversely to the extrusion direction to form notches in the fins. The notches being aligned in succession to allow air to flow outside the housing by natural convection in the optimum direction.

Abstract: The present invention relates to a method of cooling a static electronic power converter device including at least one electrical circuit including an assembly of active components and of passive components mounted in a closed radiator housing from which only the inlet and the outlet of the circuit communicate with the outside of the housing, in which the distribution of the heat energy given off by the active and passive components is made uniform throughout the inside volume of the housing, and the heat energy is transferred from the radiator housing by forced convection in substantially uniform manner over the entire inside surface of the walls of the housing by causing at least one fluid contained inside the leaktight housing to circulate in a closed circuit. The invention also provides a static electronic power converter device enabling the method to be implemented.

Abstract: Lighting units (22) in a room (20) are controlled automatically and remotely in response to motion sensor modules (26) located to cover the area of the room (20). A sensor module (26) detecting movement transmits a radio signal to a controller module (28), which then transmits a corresponding control signal to the responder modules (24), causing them to switch their associated lighting units on and then increase their brightness to a preset level. The system includes an emergency lighting responder module (32) to switch on emergency lighting (34) if mains power fails and is also responsive to ambient light level. Each of the controller module (28), the sensor modules (26) and the responder modules (24) include a radio transceiver and all control and management signals are transmitted from location to location by radio. Other sensor modules (responsive to different variables) and responder modules may be added to build up a wireless building management system.