Electromagnetic wave reducing heater

Abstract

A heater with reduced electromagnetic wave emissions, comprising two heating elements separated by an insulating layer and receiving opposite-phase alternating current in a way that cancels out electromagnetic wave emissions.

1 . A heating system associated with a sauna, comprising:
 a first planar conductive heating element configured to generate heat using a first alternating current;   a second planar conductive heating element configured to generate heat using a second alternating current;   a heat-resistant sheet between the first planar conductive heating element and the second planar conductive heating element;   one or more alternating current sources configured to control the amount of first alternating current and the second alternating current provided to the first planar conductive heating element and the second planar conductive heating element respectively, wherein the first alternating current delivered to the first planar conductive heating element is opposite in phase to the second alternating current delivered to the second planar conductive heating element so that the electromagnetic emissions from the first planar conductive heating element are cancelled out by the electromagnetic emissions from the second planar conductive heating element.   
     
     
         2 . The heating system of  claim 1 , wherein the heat-resistant sheet is an insulation layer comprising a polyester or heat-resistant plastic film. 
     
     
         3 . The heating system of  claim 1 , wherein the first planar conductive heating element and the second planar conductive heating element are arranged such that their poles are opposite to each other. 
     
     
         4 . The heating system of  claim 1 , wherein the first planar conductive heating element is a metal heating element. 
     
     
         5 . The heating system of  claim 1 , wherein the second planar conductive heating element is a metal heating element. 
     
     
         6 . The heating system of  claim 1 , wherein the first planar conductive heating element is a carbon impregnated material. 
     
     
         7 . The heating system of  claim 1 , wherein the second planar conductive heating element is a carbon impregnated material. 
     
     
         8 . The heating system of  claim 1 , wherein the first planar conductive heating element and the second planar conductive heating element are coupled to first electrodes and second electrodes, wherein the first electrodes and the second electrodes comprise metal foil. 
     
     
         9 . The heating system of  claim 8 , wherein the metal foil has a first thickness that is less than a second thickness of the insulation layer. 
     
     
         10 . The heating system of  claim 8 , wherein the first electrodes and the second electrodes are located at a relative position and distance with respect to each other such that the electromagnetic emissions coming from the first planar conductive heating element and first electrodes are cancelled out by the electromagnetic emissions coming from the second planar conductive heating element and second electrodes. 
     
     
         11 . The heating system of  claim 10 , wherein the first planar conductive heating element and the second planar conductive heating element are carbon fiber planar heating elements. 
     
     
         12 . An apparatus, comprising:
 a first planar conductive heating element configured to generate heat using a first alternating current;   a second planar conductive heating element configured to generate heat using a second alternating current;   a heat-resistant sheet between the first planar conductive heating element and the second planar conductive heating element;   one or more alternating current sources configured to control the amount of first alternating current and the second alternating current provided to the first planar conductive heating element and the second planar conductive heating element respectively, wherein the first alternating current delivered to the first planar conductive heating element is opposite in phase to the second alternating current delivered to the second planar conductive heating element so that the electromagnetic emissions from the first planar conductive heating element are cancelled out by the electromagnetic emissions from the second planar conductive heating element.   
     
     
         13 . The heating system of  claim 12 , wherein the heat-resistant sheet is an insulation layer comprising a polyester or heat-resistant plastic film. 
     
     
         14 . The apparatus of  claim 12 , wherein the first planar conductive heating element and the second planar conductive heating element are arranged such that their poles are opposite to each other. 
     
     
         15 . The apparatus of  claim 12 , wherein the first planar conductive heating element is a metal heating element. 
     
     
         16 . The apparatus of  claim 12 , wherein the second planar conductive heating element is a metal heating element. 
     
     
         17 . The apparatus of  claim 12 , wherein the first planar conductive heating element is a carbon impregnated material. 
     
     
         18 . The apparatus of  claim 12 , wherein the second planar conductive heating element is a carbon impregnated material. 
     
     
         19 . The apparatus of  claim 12 , wherein the first planar conductive heating element and the second planar conductive heating element are coupled to first electrodes and second electrodes, wherein the first electrodes and the second electrodes comprise metal foil. 
     
     
         20 . The apparatus of  claim 19 , wherein the metal foil has a first thickness that is less than a second thickness of the insulation layer. 
     
     
         21 . The apparatus of  claim 19 , wherein the first electrodes and the second electrodes are located at a relative position and distance with respect to each other such that the electromagnetic emissions coming from the first planar conductive heating element and first electrodes are cancelled out by the electromagnetic emissions coming from the second planar conductive heating element and second electrodes. 
     
     
         22 . The apparatus of  claim 21 , wherein the first planar conductive heating element and the second planar conductive heating element are carbon fiber planar heating elements.