EP2000003A1 - Infrarot-bestrahlungseinheit - Google Patents
Infrarot-bestrahlungseinheitInfo
- Publication number
- EP2000003A1 EP2000003A1 EP07723672A EP07723672A EP2000003A1 EP 2000003 A1 EP2000003 A1 EP 2000003A1 EP 07723672 A EP07723672 A EP 07723672A EP 07723672 A EP07723672 A EP 07723672A EP 2000003 A1 EP2000003 A1 EP 2000003A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat protection
- power
- radiator
- module according
- radiator module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0033—Heating devices using lamps
- H05B3/009—Heating devices using lamps heating devices not specially adapted for a particular application
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
Definitions
- the present invention relates to high power radiator modules, in particular NIR modules.
- Such modules are surface radiators and usually contain at least two parallel juxtaposed infrared radiators, which have a simple round tube or a double tube.
- air-cooled gold reflectors are suitable for focusing the radiation on the object to be irradiated. Connected loads of 200 kW / m 2 and above can only be carried out with water-cooled reflectors, as the reflectors would otherwise be destroyed very quickly by overheating.
- Such modules provided with additional water cooling are known from DE 101 56 915 or from DE 101 25 888.
- ceramic fiber boards are also disclosed as heat protection of the housing and as heat protection of a chamber in which the electrical leads and the cooling water hoses. These fiberboard protect the housing from stray radiation, which, despite the gold reflectors in the cooling channels, is still emitted in the direction of the module.
- the object of the present invention is to provide high performance radiator modules with reduced hazard potential. Solutions to the problem are made according to the independent claims. Preferred embodiments are described in the dependent claims.
- a heat protection which is inhomogeneous with respect to its optical density and consists of inorganic oxidic material is arranged between the radiator and the housing of a module.
- the heat protection according to the invention enables connection surface powers of 200 kW / m 2 and more.
- High-power radiators with the heat protection according to the invention are extremely robust and suitable for continuous operation, ie the radiator can be operated with complete equilibrium with the environment. This equilibrium state usually sets in after 5 to 15 minutes.
- Fibers are no longer necessary for the heat protection according to the invention, which is why the danger potential emanating from fiber material is eliminated according to the invention.
- monolithic sintered body which is suitable as heat protection, in particular one-piece heat protection or as heat protection element
- processes described in EP 1 159 227 are suitable.
- monolithic sintered bodies of slip such as. B. Quarzmehlschlicker, produced by sintering.
- the heat protection or the heat protection elements have material with a grain size in the nanometer or micrometer range; is the heat protection or are the heat protection elements one or a monolith;
- the material of the heat protection or heat protection elements on inclusions in the nanometer or micrometer range, such as cavities or crystals.
- the optical density of the heat protection varies with respect to IR radiation and possibly with respect to UV radiation, in particular in the micro range is uneven. For this bubbles or doping have proven.
- the dimensions of these inclusions are less than 1 mm, preferably less than 100 ⁇ m, and more preferably less than 10 ⁇ m.
- the heat protection which is optically inhomogeneous with respect to IR radiation consists of a material transparent to IR radiation, such as quartz glass or Al 2 O 3 ceramic.
- variations in the optical density, in particular by different phases within the inorganic oxide material are formed so that these variations in the optical density of the material scatter substantial radiation components.
- this invention in its optical density with respect to IR radiation or possibly UV radiation nonuniform material in the wavelength range in which a very high transparency would be achieved with homogeneous and single-phase design of the material, not the energy transfer, which Damage the case.
- this is the wavelength range from 180 nm to 5000 nm for quartz glass.
- the range from 180 to 400 nm, in particular 200 nm to 380 nm, is decisive for UV radiators and the range from 760 to 5000 nm. especially 780 to 4000 nm, relevant for IR emitters.
- This property is achieved by an optical inhomogeneity of the quartz glass, such as by targeted and homogeneous introduction of bubbles and disturbances.
- Alumina in pure form has a very good transmission of UV radiation to about 6000 nm out.
- the said property is achieved by a suitable microcrystalline structure of the solid. It is surprising that the shield is applicable under conditions that metallic reflectors can no longer withstand, although the shield absorbs more radiant energy or radiant power than reflectors, but not as it thereby loses its functionality. While metallic reflectors depend in their functionality on their surface and thus lose their functionality when damaged, the functionality of the heat protection according to the invention depends on its thickness, which in contrast to the known reflectors, the rusticity of the heat protection increases with the thickness thereof.
- High-performance radiator modules which are distinguished by the fact that the heat protection arranged between radiator and housing has only one air cooling for its cooling, wherein in a preferred embodiment the air cooling additionally cools the radiator.
- a simple air cooling whose energy consumption in relation to the radiator performance is negligible, for example in the percent or per thousand range
- robust high-power radiator modules with a pad power of 400 to 600 KW / m 2 can be realized with the heat protection according to the invention.
- connection capacities of more than 600 KW / m 2 are possible, with even connection area performance of more than 1 MW / m 2 are feasible.
- a simple air cooling takes place for example by an air flow from a fan, a fan or a centrifugal compressor.
- cooling with another process gas e.g. Nitrogen or argon included.
- the invention also encompasses the cooling with a stream of compressed air or other suitable gas, which was not generated directly by means of a centrifugal compressor, a fan or a fan, but is taken indirectly from a pressure circuit or pressure vessels, as well as any other known to the expert variant the generation of a suitable gas stream.
- the heat protection on the side of the case is coated with gold. This reduces the secondary radiation from the surface of a heated in operation heat protection. The radiation of the secondary radiation then takes place predominantly from the ungolded radiator-side surface.
- the high-power radiator modules equipped with the heat protection according to the invention show no deterioration of the efficiency with increasing operating time, as is known, for example, from high-power radiator modules with water-cooled reflectors.
- the inorganic oxide material of the heat protection is selectable from high-temperature-stable glasses, in particular quartz glass, as well as from glass ceramics, aluminosilicate or ceramics, in particular aluminum oxide. Pure quartz glass and pure aluminum oxide ceramics have proven to be particularly suitable.
- Invention vessel is provided a radiation protection, which returns much more power in the direction of the irradiating object of the radiation power directed at him, as he radiates on his back on the module and transmits. Another decisive factor is that the radiation protection does not heat up to self-destruction.
- the radiation protection devices according to the invention it is possible for the first time to provide high-power radiator modules with a connection area power of 200 watts and far beyond that without water or liquid cooling.
- the tiresome security risk with regard to water cooling is eliminated and the hitherto operated enormous effort to minimize the risk with regard to water cooling is unnecessary.
- the radiation protection according to the invention is also suitable for modules with a connected load between 100 and 200 watts / m 2 , in particular for the range of 150 to 200 watts / m 2 in which considerable efforts are made to get along without water cooling.
- the radiation protection according to the invention furthermore makes it possible to further increase the connection area power of the order of magnitude of 1 MW / m 2 achievable so far with water-cooled reflectors, in particular in the case of water-cooled modules.
- optical, inhomogeneous quartz glass has proven to be radiation protection, especially in a composite with gold, in which the optical, inhomogeneous quartz glass directed to the module front is, ie in the direction of the object to be irradiated and the gold is arranged as a layer facing back on the back of the module on the optical, inhomogeneous quartz glass.
- quartz glass ceramics or ceramics glazed with quartz glass, in particular with a gold coating on the back can be used.
- the back side is coated with gold or a gold reflector to spaced.
- Air cooling has proved its worth by directing an air flow from the back of the module through openings in the radiation protection onto the radiators.
- the emitters used according to the invention have a heating filament arranged in an envelope or a discharge space delimited in the envelope.
- the envelope is preferably tubular or double-tube-shaped, wherein the tube ends are sealed vacuum-tight and have current feedthroughs.
- the radiation maximum of the radiators is preferably in the NIR, in particular in the IR-A.
- the heating filament preferably consists essentially of tungsten or carbon. For operating high-performance tungsten-based heating filaments with emitter temperatures of more than 2500 K, in particular more than 3000 K, a heat protection according to the invention between the cladding tube of the radiator and the housing holding the radiator is advantageous, in particular when using multiple radiators in a module.
- FIG. 1 shows a cross section through a high-performance module.
- FIG. 2 shows a cross section of a radiator arrangement of the module from FIG. 1.
- the heat protection 3 is made of an optical, inhomogeneous quartz glass according to Heraeus brochure "Opaque Fused Material OFM 970".
- a heat protection 3 of optically inhomogeneous quartz glass according to Heraeus brochure "Opaque Fused Material OFM 970" is coated on the housing side with gold, as is already done for gold-plated cladding of infrared radiators in a known manner.
- FIG. 1 shows a module with a surface power of 400 kW / m 2 , in which 6 twin tube radiators (1) are arranged parallel next to one another and fixed by means of holding elements (2).
- the heat protection elements (3) according to the invention made of optically inhomogeneous quartz glass are formed as half shells and are either fixed to the radiator tubes by glass blowing or according to FIG. 1 by means of additional holding elements (4). These half shells are arranged so that the individual emitters do not illuminate each other.
- the actual module consists of a housing (11), an inlet opening for air (12) and a baffle plate (13) at which the incoming air flow is distributed in the module housing.
- a diffuser plate 14
- This sheet is firstly the mechanical support of emitter and reflector, which can also be held elsewhere in the module.
- holes or slots are incorporated in this diffuser plate, which serve to optimally shape the cooling gas flow.
- holes or slots in particular centrally behind the individual heat Shields are arranged.
- additional plates from the heat shield material are arranged (15).
- FIG. 2 is an enlarged view of a portion of FIG. 1.
- Semi-shells cut from tubes made from OMF 70 are used as the heat shield (according to the Heraeus brochure "Opaque Fused Material OFM 70"), many others being optically inhomogeneous for IR radiation Quartz glasses can serve as a starting material.
- the twin tube radiators arranged in parallel are held at their long, unheated ends and are arranged in front of a plate of optically inhomogeneous, gold-plated quartz glass.
- This plate consists of several segments to keep production costs low. Holes are inserted into the segments at suitable positions, so that the gas made available in the module housing by means of suitable devices flows out through these holes in such a way that the emitters are effectively blown and convectively cooled, and secondly the still cold gas flow from the housing through the heat shield this cools.
- the plates are made of OM100 (according to Heraeus brochure "OM 100 High purity opaque quartz glass"), although many other optically inhomogeneous quartz glasses can be used as starting material.
- the twin tube radiators arranged in parallel are held at their long, unheated ends.
- the rear heat shield consists of a plate transparent quartz glass, on which a sufficiently strong layer of optically inhomogeneous quartz was applied as a slip and subsequently sintered. This layer is aligned in the direction of the infrared radiator and gold plated the back quartz plate. Slots and holes for cooling the heat shield and the radiator are performed as in Embodiment 2, but the amount of air for cooling increased accordingly.
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Glass Compositions (AREA)
- Optical Couplings Of Light Guides (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006014689A DE102006014689A1 (de) | 2006-03-28 | 2006-03-28 | Infrarot Bestrahlungseinheit |
| PCT/EP2007/002726 WO2007112896A1 (de) | 2006-03-28 | 2007-03-27 | Infrarot-bestrahlungseinheit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2000003A1 true EP2000003A1 (de) | 2008-12-10 |
| EP2000003B1 EP2000003B1 (de) | 2011-05-04 |
Family
ID=38120669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07723672A Not-in-force EP2000003B1 (de) | 2006-03-28 | 2007-03-27 | Infrarot-bestrahlungseinheit |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110044060A1 (de) |
| EP (1) | EP2000003B1 (de) |
| AT (1) | ATE508612T1 (de) |
| DE (2) | DE102006014689A1 (de) |
| WO (1) | WO2007112896A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11370213B2 (en) | 2020-10-23 | 2022-06-28 | Darcy Wallace | Apparatus and method for removing paint from a surface |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3540388A1 (de) * | 1985-11-14 | 1987-05-21 | Santrade Ltd | Verfahren und vorrichtung zur herstellung von faserbahnverstaerkten kunststofflaminaten |
| JP3203694B2 (ja) | 1991-07-19 | 2001-08-27 | 東ソー株式会社 | 石英ガラスの製造方法 |
| JPH07198949A (ja) | 1993-12-28 | 1995-08-01 | Bridgestone Corp | 光散乱体 |
| EP0728709B1 (de) * | 1995-02-22 | 1998-04-29 | Heraeus Quarzglas GmbH | Opakes Quarzglas und Verfahren zu dessen Herstellung |
| DE19962449C2 (de) | 1999-12-22 | 2003-09-25 | Heraeus Quarzglas | Quarzglastiegel und Verfahren für seine Herstellung |
| US6437290B1 (en) * | 2000-08-17 | 2002-08-20 | Tokyo Electron Limited | Heat treatment apparatus having a thin light-transmitting window |
| DE10125888C2 (de) | 2001-04-18 | 2003-03-13 | Advanced Photonics Tech Ag | Strahlermodul und Hochleistungs-Bestrahlungsanlage |
| DE10156915B4 (de) * | 2001-11-21 | 2007-11-29 | Heraeus Noblelight Gmbh | Vorrichtung zum homogenen Erwärmen von Substraten oder Oberflächen und deren Verwendung |
| DE102004002357A1 (de) * | 2004-01-15 | 2005-08-11 | Heraeus Noblelight Gmbh | Verfahren zum Betreiben eines Infrarotstrahlerelements sowie Verwendung |
-
2006
- 2006-03-28 DE DE102006014689A patent/DE102006014689A1/de not_active Withdrawn
-
2007
- 2007-03-27 WO PCT/EP2007/002726 patent/WO2007112896A1/de not_active Ceased
- 2007-03-27 EP EP07723672A patent/EP2000003B1/de not_active Not-in-force
- 2007-03-27 US US12/294,465 patent/US20110044060A1/en not_active Abandoned
- 2007-03-27 DE DE502007007128T patent/DE502007007128D1/de active Active
- 2007-03-27 AT AT07723672T patent/ATE508612T1/de active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007112896A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110044060A1 (en) | 2011-02-24 |
| DE502007007128D1 (de) | 2011-06-16 |
| WO2007112896A1 (de) | 2007-10-11 |
| ATE508612T1 (de) | 2011-05-15 |
| DE102006014689A1 (de) | 2007-10-11 |
| EP2000003B1 (de) | 2011-05-04 |
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