Abstract: In order to improve the energy balance for air cooling in equipment cabinets, in particular cabinet arrangements in computer centres and server rooms, regulation of the fans for the cooling air circuit is proposed, by means of which precisely the required amount of cooling air can be made available in the induction area to the electronic module units, in particular servers, in the equipment cabinets. According to the invention, at least one leakage air flow is formed between a cold air channel and an exhaust air channel, and is provided with a temperature sensor. The temperature measurement indirectly measures the flow direction and acts as a reference variable for regulating the rotation speed of the fans which, in particular, are arranged in the exhaust air channel. Regulation of the fan rotation speed matches the volume flow of the cooling air circuit to the volume flow actually required by the electronic module units, and therefore reduces the electricity consumption.

Abstract: The invention relates to a system for cooling electrical and electronic components and devices placed in a housing. The invention is particularly intended for outdoor cabinets and housings of the telecommunications technology. In order to create a cooling system in which an inexpensive filter is used and positioned in such a way as to ensure an extremely good sealing action, a filter trough is placed in a housing wall or door, in which the filter is received so as to be detachable and replaceable from the outside and is sealed against the filter trough on its air outlet side with the aid of a circumferential seal.

Abstract: The invention relates to a switch cabinet with a closed cooling air circuit and a heat exchanger for dissipating the heat loss from electronic modular units located in an inner area. For efficient cooling and to avoid the removal to the switch cabinet environment of condensate produced in the heat exchanger, at least one atomizing device is provided and transforms the condensate into aerosols. The condensate aerosols are immediately resupplied to the cooling air circuit, preferably the hot, dry exhaust air flow, so that simultaneously an advantageous atmospheric humidity stabilization in the switch cabinet is ensured.