Patent EA-004126-B1 (EA)
Title: Antenna radiation heater for heating a material by using resonance
Inventor: REICHELT HELMUT
IPC: F24D13/00
Filed: 2001-06-01
Abstract: 1. Antenna radiation heating to heat a matter by means of resonance, with several surface antenna elements, each consisting of a carrier surface material and a radiation coating applied thereon which is delimited by two spaced parallel electrical conductors with electrical contact as antenna limiters and with which high-frequency electromagnetic radiation can be emitted, and with a harmonic generator which is coupled to the two electrical conductors of a surface antenna element for an excitation of the radiation coating for the emission of an oscillation spectrum within the range of molecular natural frequencies of the matter to be heated, characterized in that the radiation coating (10) is applied unilaterally onto the carrier surface material (11) and forms an element front, facing a matter to be heated and a contact protection layer (12) being applied on the radiation coating (10) which, on the one hand, electrically insulates the radiation coating (10) against contact and, on the other hand, enables the emission of the oscillation spectrum without or at least with only minor attenuation. 2. Antenna radiation heating according to claim 1, characterized in that the carrier surface material (11) as the element's reverse side, on the one hand, electrically insulates the radiation coating (10) against contact and, on the other hand, prevents the emission of the oscillation spectrum entirely or at least with considerable attenuation. 3. Antenna radiation heating according to claim 1 or claim 2, characterized in that the contact protection layer (12) consists of an aqueous, finely dispersed, softener-free, medium viscosity copolymer dispersion of acrylic and methacrylic acid esters. 4. Antenna radiation heating according to claim 1 or claim 2, characterized in that the contact protection layer (12) consists of an aqueous, protective colloidal, medium viscosity polymer dispersion of vinyl acetate, versatic acid vinyl ester and maleic acid- di-n-butyl ester. 5. Antenna radiation heating according to any one of the claims 1 to 4, characterized in that the coating material of the radiation coating (10) is composed of binding agent, insulator, dispersing agent, water and graphite and has the following composition a. 55 to 65% amount of substance of a base material comprising 39 to 49% amount of substance binding agent, 18 to 23% amount of substance insulator, 18 to 24% amount of substance dispersing agent, 12 to 16% amount of substance distilled water and b. 35 to 45% amount of substance graphite, the composition of the binding agent being 64 to 79%<SEP>amount of substance distilled water, 4 to 6%<SEP>amount of substance sulfonated oil, 0.15 to 0.24%<SEP>amount of substance phenols, or 0.05 to 0.5% amount of substance benzisothiazolinone, 15 to 19% amount of substance casein, 0.8 to 1.2% amount of substance urea, 2 to 3 % amount of substance alkaline thinning agent, and 2.5 to 3.5 % amount of substance caprolactam. 6. Antenna radiation heating according to any one of the claims 1 to 5, characterized in that the radiation coating (10) and/or, after its firming up, the contact protection layer (12) are produced by means of blade spreading. 7. Antenna radiation heating according to any one of the claims 1 to 6, characterized in that the harmonic generator as a component of a control/regulating device (7) comprises an electrical block which, upon control with a control oscillation, shows a steep current increase speed in accordance with a steep rising edge and thus is suitable for generating a high harmonic percentage. 8. Antenna radiation heating according to any one of the claims 1 to 7, characterized in that the electrical conductors are designed as copper foil strips (14, 15) arranged in parallel and the electrical contact for radiation coating (10) being designed as a capacitive and/or inductive coupling, with the radiation coating (10) lying under or over the copper foil strips (14, 15) or that these are embedded in the radiation coating. 9. Antenna radiation heating according to any one of the claims 1 to 8, characterized in that the several surface antenna elements (3) are arranged within mutual reach, electrically connected in parallel and excitable by means of a harmonic generator. 10. Antenna radiation heating according to any one of the claims 1 to 9, characterized in that all surface antenna elements (3) have an identical right-angled surface and are connected in parallel in a symmetrical arrangement with short lengths of supply lines.