SU669431A1 - Method of cooling components of heat-generating electric apparatus - Google Patents

Description

The invention relates to the field of electrical engineering, in particular, to methods for cooling electrical equipment elements having a high heat generation during operation, preferably for cooling semiconductor devices. The most efficient way to cool an electrical appliance, which allows it to remove a large load from it, is a method of cooling with a liquid refrigerant 1. It consists of washing the electric apparatus or its radiators with a stream of liquid refrigerant. The disadvantage of this method is that the liquid refrigerant for electrical equipment with HIGH operating potential must be a dielectric, in the opposite case, if the liquid refrigerant loses the dielectric property, a current flow circuit may occur, which may lead to cooling of the device. The closest technical solution is the method of cooling elements of the heat-generating electrical equipment, mainly semiconductor devices, with liquid refrigerant 2. In this method, the refrigerant washes in the coolers and may not be a dielectric, such as process water or liquid meth. But in this case, devices for coolers should be installed on insulating gaskets, which, 8 turn, reduces the efficiency of cooling, since insulators are poor heat conductors. The aim of the invention is to increase the efficiency of the cold. This is achieved in that the cooling is performed in discrete portions of the refrigerant and the dielectric. The drawing shows a variant of the device that implements the proposed method. The cooling system is made for an electrical circuit consisting of three series-connected power semiconductor valves 1. Coolers 2 are installed between the valves. They are equipped with liquid flow. Each cooler is fitted at the top with a glass 3 and at the bottom with a tank 4 with a valve 5. A valve 6 from pipe 7 is installed above each glass 3. Valves 5 and 6 are controlled by a unit not shown on the rack.