Equipment, such as ventilation fans, with removable mains PSU mounted in fan housing or externally to comply with safety extra low voltage SELV standards

摘要

Equipment, such as an extractor fan for ventilation of rooms that may be wet, such as bathrooms, has a power supply (PS) designed to be mountable internally or externally to the equipment as a module that may comprise a PCB and base mounting plate. The power supply converts a high input voltage, such as a mains AC supply to a low output voltage, such as a safer 24v or 12v DC supply for the fan or other equipment. When removed, the PS may allow the fan etc. to be located in domestic areas with designated restrictions requiring safer lower voltages, the PS then located remotely from the area and preferably in a separate remote housing (190) as figure 3 shows. The PS is mounted in a removable manner on a chassis carrying the extractor fan and within a fan housing (110,120); the PS is shown mounted in figure 1. Figure 4 has a clearer view of high voltage mains connection means 160, 200 and low voltage output connection means 164, 202; also shown are mounting holes (174) for the fan chassis and alternative mounting holes 180 for separate housing (190 fig 3). The chassis may include a second low voltage connector 166 for use when the PS is remotely located and connected to the fan etc. by cables.