12-03-2015 дата публикации
Номер: US20150067958A1
Принадлежит:
A sauna that reduces EMI emissions in the sauna room by, in the preferred embodiment, passing the AC current through an EMI filter, converting it to DC current, and passing it through another EMI filter to remove any remaining irregularities. 1. A sauna , comprising:a sauna room comprising at least one heater;an AC power supply;a first EMI filter circuit connected to the AC power supply;an AC to DC converter connected to the first EMI filter circuit, said AC to DC converter comprising an AC input and a DC output, said DC output connected to the at least one heater.2. The sauna of claim 1 , further comprising:a second EMI filter circuit connected between the DC output and the at least one heater.3. The sauna of claim 1 , where the AC power supply claim 1 , the first EMI filter circuit claim 1 , and the AC to DC converter are located outside the sauna room.4. The sauna of claim 1 , where the AC power supply claim 1 , the first EMI filter circuit claim 1 , and the AC to DC converter are located at such a distance from the sauna room as to reduce EMF levels within the sauna room by at least a factor of 100.5. The sauna of claim 1 , where the at least one heater is selected from a group comprising: mica heater claim 1 , light tube claim 1 , carbon fiber heater claim 1 , heating pipe.6. The sauna of claim 1 , further comprising EMI shielding. This application claims priority under 35 U.S.C. 119(a) to Chinese Patent No. 2012 2 0471712.8, filed on Sep. 14, 2012 and issued on Apr. 17, 2013.The present invention relates generally to sauna technology, and particularly to low EMI saunas.Various heating devices are used in sauna rooms around the world. Typically, the heaters used for that purpose are mica heaters, carbon fiber heaters, ceramic rods, film heaters, iron heat pipes, light tubes, and so on. These heating appliances usually use 110V-130V or 220V-240V alternating current. Testing shows that this makes these heaters produce electromagnetic radiation at 30 Hz-3 GHz at ...
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