DE102014012219A1 - Lamp module with light emitting diodes and photoreactor - Google Patents

Abstract

The invention relates to a lamp module (10) for photochemical reactors and such a photoreactor. The lamp module (10) has a heat sink (3), on the outside of which at least one carrier structure (2) with at least one light-emitting diode (LED) (1) is arranged, and a head part (12) for electrical connection of the at least one LED (FIG. 1) and for holding the lamp module (10). The heat sink (3) delimits at least one fluid path (a) which has at least one feed section (4) and at least one return section (5). The feed section (4) is fluidically connectable via the head part (12) to a coolant source (Q) and the at least one return section (5) via the head part (12) to a coolant return (R). The heat sink (3) further limits at least one chamber (6) at least partially, through which at least one power supply and / or control line (15) from the head part (12) to a contact element (1 ') of the at least one LED (1 ).

Description

The invention relates to a lamp module with light-emitting diodes (LEDs), which can be used as a submersible in photoreactors for performing photochemical reactions or in so-called AOPs ("advanced oxidation processes") and for disinfection purposes, and a corresponding photoreactor.

From the prior art is known to use radiation sources, in particular UV emitters as diving lamps in a liquid medium to z. B. to disinfect water or to perform photochemical reactions. Conventionally, low-pressure or medium-pressure lamps (discharge lamps) are usually used, the z. B. are enveloped by a dip tube to protect against pollution, which is translucent for the emitted or relevant for the photochemical reaction radiation. The emission spectrum of the discharge lamps can be varied by appropriate doping and adjusted to some extent according to the requirements for the photochemical reaction.

However, the use of low-pressure or medium-pressure lamps is associated with high power consumption and with increasing age, the radiation intensity decreases significantly, further, the radiation spectrum may shift, which requires a regular review in relatively short time intervals.

In the field of illuminants, LEDs are becoming increasingly important due to their comparatively low power consumption, long service life and high switching resistance in the event of spontaneous full luminous flux. The LED emits light, infrared or UV radiation when electrical current flows in the forward direction. The wavelength of the emitted radiation depends on the doping of the semiconductor component. For UV radiation such as diamond, aluminum nitride, aluminum gallium nitride or Aluminiumgalliumindiumnitrid come into question.

For the use of LEDs in photobioreactors for the cultivation of microorganisms is in the US2010 / 0267125 A1 an LED lighting module described in which the LEDs are cooled. The LEDs are arranged on a single-sided closed carrier tube, which is surrounded by a transparent cladding tube. Within the support tube is disposed an inner tube which terminates above the closed end of the support tube such that within the support tube there is a fluid path having an upstream portion in the gap between the support tube and inner tube and with a downstream portion in the inner tube. The upstream portion is fluidly connected to a coolant source via a head portion closing the support and inner tubes, and the downstream portion is connected to a coolant return, respectively.

In bioreactors pressure and temperature conditions are present in the reaction space, which do not differ significantly from ambient pressure and room temperature, since usually only such an optimal growth of the microorganisms can be achieved.

Should LEDs in photoreactors for chemical syntheses, eg. As photochlorination or photobromination are used, a corresponding lamp module of a diving lamp must meet the increased requirements in terms of the surrounding reaction conditions, which can differ very significantly from ambient pressure and room temperature. Furthermore, the use of LEDs on an industrial scale, in which reaction chambers can also measure several meters and in which the low-pressure or medium-pressure radiators previously used as submersible lamps have dimensions of a corresponding magnitude, due to the operation of the LEDs with low voltage and for a high Radiation power required high amperage not possible.

LEDs are not heat radiators, such as medium-pressure lamps; however, high temperatures - usually caused by high currents needed for maximum light output - significantly shorten the life of the LEDs. If the LEDs are to be operated with high currents for a high light output or radiation intensity, effective heat dissipation is required in order to preserve the service life of the LEDs. Often metal housings, mostly of aluminum, are used for heat dissipation.

In order to avoid this adverse effect of the elevated temperature at higher currents, LEDs are often not at rated power, but lower - connected with lower luminous power - operated. In order nevertheless to achieve a desired amount of light, then the number of LEDs used is increased.

Based on this prior art, it is an object of the present invention, an improved with respect to the power LED lamp module that can be used in particular on an industrial scale with a significantly increased number of LEDs as a dive light for photochemical synthesis or photocatalytic synthesis, AOPs and disinfection is to provide.

This object is achieved by an LED lamp module having the features of claim 1.

Further developments of the subject are set forth in the subclaims.

The further object of providing an improved photoreactor with LEDs as the radiation source is achieved by the photoreactor having the features of independent claim 10.

A lamp module according to the invention, which is designed to be used as a submersible lamp in photochemical reactors, has a heat sink, on the outside of which at least one support structure - usually a printed circuit board - with one or more suitable many light-emitting diodes (LED) is arranged. In order to provide sufficient radiation power on an industrial scale, however, several carrier structures with a plurality of LEDs will preferably be arranged on the heat sink. The heat sink limits at least one fluid path in which a coolant is guided or circulated. Which coolant is suitably used may depend on the reaction temperatures in the surrounding reaction space. The fluid path is divided into one or more supply and return sections, wherein the or the feed section (s) via a head portion of the lamp module with a coolant source and the or the return portion (s) on the head portion, which further for electrically connecting the at least one LED and is used to hold the lamp module, are connected to a coolant return. Coolant source and return can also be cycled.

Thus, in lamp modules having a plurality of support structures for a correspondingly increased number of LEDs and longer LED lamps, adjacent to each other in the two or more support structures with LEDs along the heatsink, the electrical contact with the LEDs on the support structure (s), not the Headpiece adjacent but spaced therefrom is arranged, can be provided without shading the overlying LEDs, the heat sink adjacent to the fluid path further limited one or more chamber (s) at least partially through which at least one power supply and / or control line of the Head part extends to a respective contact element of the at least one LEDs on the respective support structure.

The required number and / or size of the chamber (s) is dependent on the total number of LEDs of the lamp module and their distribution along the heat sink jacket surface, because with increasing LED number increases the required cable cross-section as a result of occurring in series connection of semiconductor devices capacity losses with less Be operated voltage. In this case, a predetermined number of LEDs, which may be a fraction of the total number and which are preferably arranged on a common carrier structure, each connected to at least one of the electrical lines. A maximum number of LEDs, which are arranged on a support structure, and thus the maximum length of a support structure, may be predetermined.

Preferred arrangements of the supply and return sections of the cooling fluid path in the heat sink may provide a longitudinally and centrally extending feed section which divides into a plurality of return sections arranged axially parallel or concentric about the feed section corresponding to the arrangement of the support structures with the LEDs on the shell surface of the heat sink are. In general, however, the flow direction of the fluid path can also be reversed, so that a plurality of feed sections are arranged axially parallel or concentrically about a longitudinally and centrally running return section.

The chamber for the electrical line can then - depending on the type of manufacturing the heat sink and the course of the fluid path - längsaxial and centrally or concentrically around a längsaxial and centrally extending fluid path section within the heat sink, for example, in spaces between the longitudinal axial and central feed section and the Return sections, when about the heat sink is formed by extruded profiles. Alternatively, a plurality of axially parallel chambers may be formed by incisions of the heat sink on the outside thereof in connection with the support structures arranged on the heat sink, which close a cavity formed by the incisions of the heat sink.

The heat sink may further be dimensioned according to the number and arrangement of the LEDs on the at least one support structure or the support structures. The heat sink can be formed by a cylindrical, preferably regular, prismatic hollow or solid profile in the geometrical sense, wherein the support structure (s) with the LEDs are arranged on the flat (non-concave) sections of the lateral surface of the prism.

The arrangement of the LEDs on the support structure (s) arranged on the heat sink preferably corresponds to a course of the return sections within the heat sink, so that effective cooling of the LEDs is provided.

Coolant, electrical, and mechanical connection devices may be provided at the head of the lamp module. The electrical connection device ensures the connection of the power supply and / or control line with a power supply and Control device of the lamp module. The power supply and control device of the lamp module for the LEDs, which may include, for example, power electronics, drivers and power supplies may optionally be housed in the headboard. For cooling a power supply and control device accommodated in the head part, the head part can then likewise have at least one coolant path, which is preferably connected via the coolant lines to the coolant path present in the heat sink. The coolant path in the head part can be designed as a bypass to the coolant circuit through the heat sink, it can be integrated into the coolant supply line or into the discharge line, or it can be formed by two partial paths, one in each case and in the discharge line.

Coolant connection devices on the header connect the supply and return sections via coolant lines to the coolant source and the coolant return. For the mechanical support of the lamp module provides a mechanical connection device for connecting the head part with a corresponding bracket. All connection devices may preferably be designed as detachable plug-in, screw, Steckschraub-, clamped connections or the like, so that the lamp module easily separated from the power supply and / or control line or device, the coolant lines and the mechanical support and attached again can. Holder and coolant line can be realized depending on the arrangement of the LED body as a rigid (pipe) connections or non-rigid hoses for the coolant lines and metal or plastic cables or chains for the holder, so that, for example, in a vertical arrangement of the LED body quasi swinging freely suspended from the headboard, which in turn facilitates the handling of the lamp module.

Furthermore, it is possible that not only the division of a fluid path into inlet and outlet sections depends on the number and arrangement of the LEDs on the heat sink; the number of fluid paths - not their distribution - through the heat sink is also dependent on the total number of LEDs of the lamp module, since on the one hand a fluid path only leads to a predetermined cooling performance and on the other hand, all LEDs should be cooled as evenly as possible. Thus, in each case a fluid path for cooling a further predetermined number of LEDs can be provided, which defines an LED cooling group. Although this predetermined number of LEDs in the cooling group may correspond to the predetermined number of arranged on a support structure or connected to a power-conducting device LEDs; however, depending on the cooling capacity, the predetermined number of LEDs in the cooling group will be larger and preferably be a multiple of the number of LEDs connected to a power-conducting device or arranged on a carrier structure. Thus, the LEDs, which are arranged on a plurality of circumferentially adjacent support structures along a lateral surface portion of the heat sink, can be cooled by a fluid path in which z. B. divides a feed section into a plurality of return sections corresponding to the arrangement of the LEDs on the lateral surface. If a plurality of lateral surface sections are provided along the length of the heat sink, so that a plurality of support structures may be arranged not only circumferentially adjacent to the heat sink but also along its length, it may be provided according to the invention that the supply sections of the cooling fluid paths for a second or further LED cooling group do not start at the top of the heat sink - as for a first cooling group - but at an appropriate height along the length of the heat sink. D. h., They are assigned to the lateral surface portion on which the support structures with the LEDs, which form a second or further cooling group, are arranged. The same can also apply to the return sections of further fluid paths.

In order to protect the LED body and the head part from the reaction conditions in the surrounding reaction space, a lamp module according to the invention can have a dip tube in which at least the LED body, preferably also the head part, are arranged. The dip tube is usefully made of a material permeable to the wavelengths of the radiation emitted by the LEDs. In addition, the dip tube is in terms of material selection and shaping to reaction pressures in the range of high vacuum up to 6 bar overpressure, which can prevail in the surrounding the dip tube reaction space designed. Suitable materials are natural or synthetic quartz glass or quartz glass mixtures or borosilicate, etc. in question, constructively the dip tube is designed with a wall thickness of at least 3.5 mm. A cone flange for receiving the head part further improves the mechanical stability of the lamp module as a dive light. Used immersion tubes can also be annealed at least once and pressure-tested up to 10 bar gauge.

The dip tube can be closed on one side, so that the closed end can lie in the reaction space of the surrounding photoreactor, as is often the case with a vertical arrangement of diving lamps; However, the dip tube can also be open on both sides, and can also be used horizontally in reactors, with the open ends of the dip tube protruding from the reaction chamber, as it were.

So that the lamp module can also be operated in reaction environments which can potentially form explosive atmospheres be provided that the head part at the open end of a one-sided closed dip tube sealingly and resiliently mounted therewith is connected. An inert gas supply passage extends through the heat sink or as a hose or tube through the space formed between the heat sink and the dip tube to above the closed end of the dip tube. Due to the resilient mounting of the head part with the dip tube vibrations to avoid glass-metal contact can be damped and by the sealed connection, an overpressure in the dip tube against the ambient pressure of at least 0.8 mbar to 15 mbar can be generated and maintained, so that no flammable atmosphere can penetrate into the interior of the dip tube to the LED body and the headboard.

If a dip tube open on both sides is used, one end is closed by the sealing and spring-mounted head part and the other end by a corresponding closure part. The inert gas to create the overpressure in the immersion tube interior can then be done on one side.

Further, the lamp module may include one or more temperature sensors disposed on the support structure (s) and connected to the power supply and control device of the lamp module including a circuit breaker for LEDs. The power supply and control device may further alternatively or additionally comprise at least one control circuit for the LED drive, with the same or different LEDs are dimmable and / or the spectrum of the emitted wavelengths of different LEDs is changeable to the emitted light quantity or the emitted wavelengths Adapt reaction course in the surrounding reaction space.

A photoreactor according to the invention has a reaction vessel which delimits a reaction space for carrying out a photochemical reaction of at least one reactant fed into the reaction vessel or introduced there. Furthermore, it comprises at least one lamp module according to the invention arranged in the reaction vessel with an emission spectrum suitable for the photochemical reaction.

Other embodiments as well as some of the advantages associated with these and other embodiments will become apparent and better understood by the following detailed description with reference to the accompanying drawings. Items or parts thereof that are substantially the same or similar may be provided with the same reference numerals. The figures are merely a schematic representation of an embodiment of the invention.

Showing:

1 a side view of a lamp module according to the invention,

2 a plan view of the lamp module 1 .

3a a schematic plan view and this

3b a side sectional view along section line AA in (a) on the fitted with LEDs heatsink of a lamp module, the heat sink has a quadrangular cross-section and a centrally arranged cable chamber,

4 a side view of a mounted on the heat sink support structure with LEDs and electrical contact,

5a a schematic plan view and this

5b a side sectional view corresponding to section line AA in on the equipped with LEDs heatsink of a lamp module, the heat sink is formed of a hexagonal extruded profile with central inlet channel and six symmetrically arranged around return channels,

6a a schematic plan view and this

6b a side sectional view (b) corresponding to section line AA in (a) on the LED body of a lamp module with a full heat sink profile, in which cable chambers are formed by concave incisions,

7 a schematic side view of an arranged in a dip tube LED lamp module.

The device according to the invention relates to an LED lamp module, which is designed to be used as a submersible lamp in a photoreactor, and to a equipped with one or more such LED lamp modules according to the invention photoreactor.

In the present specification, reference is made to LEDs as the light source. In this case, all light-emitting semiconductor components, including organic light-emitting diodes (OLEDs), are included.

The term LED body in the present description means the body consisting of heatsinks and the carrier structures mounted thereon with LEDs. The term LED lamp is used herein to mean the unit of LED body and headboard spaced therefrom. The LED lamp module may also include other components, such as a dip tube surrounding the LED lamp, etc.

In order to compete with low- and medium-pressure lamps in the field of photochemistry and to achieve a high power density, LEDs must be operated at high power, whereby an active cooling with a coolant, such. As water, is required. The water as a coolant can be deionized and / or have additives to prevent contamination of system components by components of the cooling water or microorganisms. The type of coolant can also be dependent on the reaction temperature in the surrounding reaction medium, so z. Example, at reaction temperatures below 10 ° C, are used as coolant, for example, glycerol, glycols or alcohols or non-conductive silicone oils; of course also in mixtures or aqueous solution. Handling and controlling the heat budget - in short, thermal management - of an LED lamp module, which must also take into account the process temperature of the reaction medium surrounding the lamp module, is critical for adequate life.

Furthermore, in the field of industrial photochemistry, lamps with significantly larger dimensions (up to 2 m in length or even longer in medium-pressure lamps) and corresponding power used, which has hitherto limited the use of LEDs in this area, since the requirements for power supply and also Cooling has not yet been achieved - the length or number of high-density LEDs connected in series is limited because of the resulting increase in voltage; because the semiconductor elements are operated at low voltages. Thus, the capacity losses pose a challenge, requiring larger cable cross-sections and limiting the cable length. While it is possible for medium-pressure beam sources due to the easily realizable long cable lengths of several hundred meters to accommodate the power supply and control of the light source outside the photoreactor and thus outside a potentially explosive environment, this is not possible with the LED lamp modules due to the limitations mentioned.

Another difficulty with longer lamp modules is to provide uniform cooling to all LEDs to prevent the LEDs near upstream portions of the fluid path from being cooled significantly more than LEDs located at more downstream portions of the fluid path.

On the one hand to improve the power supply and on the other hand, the light output of a lamp module equipped with LEDs, the invention provides the heat sink, which is equipped with LEDs by means of support structures to design with at least one chamber in which the required for the electrical supply and control of the LEDs lines can be accommodated and so shadows can be avoided by external lines, whereby the amount of light available in the reaction chamber would be reduced.

In 1 is an LED lamp module 10 shown for photochemical reactors, in which LED chips, each one LED 1 on a support structure 2 include, on the outside of a heat sink 3 are arranged. At the head of the heat sink 3 lies the headboard 12 before, on the preferably detachable hose connections 8th for connecting the inside of the heat sink 3 present fluid path 4 . 5 over coolant lines 13 are provided with a coolant source Q and a coolant return R. This can also be a coolant circuit.

Next is in 1 at the headboard 12 a plug connection 7 for producing the electrical contacting of the LEDs 1 via corresponding electrical lines 15 and a plug connection 9 for suspension of the lamp module 10 by means of a suitably equipped holder 14 to see.

In the embodiment shown, the head part comprises 12 also the power supply and control device 16 from the same cooling circuit as the fluid path in the heat sink 3 is cooled by fluid path sections through the head part 12 run. Because the power components of the LED lamp, such as drivers and power supplies, also include semiconductor devices that are temperature sensitive, the cooling used for the LEDs can also be used to cool the power electronics or LED drivers in the header through the same cooling water circuit.

2 shows the here cylindrical headboard 12 of the lamp module 10 from above with an axially centrally arranged electrical connection 7 , In general, the head part may also have a cross-sectional profile deviating from a circular cross-section. The coolant connections 8th and connectors 9 for the bracket are concentric around the electrical connection 7 distributed.

3a , b, 5a , Federation 6a , b show different embodiments of a LED equipped with heat sink 3 a lamp module according to the invention 10 in a) cross-section and b) longitudinal section view.

3a , b shows a heat sink 3 with square cross-section, in which on the outer surfaces carrier boards 2 with LEDs 1 are attached. In this example, the cable chamber is located 6 axial-central, two cooling inlet sections 4 and two cooling return sections 5 are arranged around it.

Of course, deviations from the number and arrangement of the coolant inlets and returns are within the scope of the invention and depend on the cross-sectional shape and length of the lamp module or of the heat sink.

Since the radiation angle of conventional LEDs is limited, polygonal, z. B. six- or octagonal profile cross sections advantageous. If OLEDs are used, even circular cylindrical shapes can be realized well.

4 shows a support structure 2 , in the present example, five LEDs 1 are arranged, which by housed in a cable chamber electrical lines 15 on the on the support structure 2 provided contact elements 1' are contacted. Here is a corner of the rectangular support structure 2 recessed to the electrical wires 15 to be able to lead inwards into the cable chamber, as well as in 5a is indicated. However, the number of LEDs provided on a support structure is not limited to five.

The lamp modules 10 in 5a , Federation 6a , B is common to the feed section 4 of the fluid path 4 , which in use is connected to the coolant source axially centrally in the heat sink 3 runs. The return sections 5 are axially parallel and concentric about the feed section 4 in the heat sink 3 arranged. The arrangement corresponds to the return sections 5 in the heat sink 3 the arrangement of the LEDs 1 that with the support structures 2 at the flat, ie non-concave portions of the lateral surface of the prismatic heat sink 3 are arranged.

The embodiments in 5a , Federation 6a , b, however, differ in the type of heat sink 3 and in the arrangement of the cable chamber 6 ,

The LED lamp module 10 in 5a , B is made of a hexagonal hollow profile, for example made of aluminum by extrusion, as a heat sink 3 with internal supply and return channels 4 . 5 receive. In the hollow profile are in this case six return channels 5 in front. Axial-central is an inlet channel 4 in front, via webs with the return channels 5 is connected, so that the spaces between inlet channel 4 and return channels 5 as cable chambers 6 be available.

6a , b shows a lamp module with a heat sink 3 that's like the heat sink in 3a , b is a solid profile (made of aluminum), but here it is based on a hexagonal cross-section in which the edges are concave, so that the base is actually an 18-corner. In each of these concave incisions is a cable chamber 6 housed by the on the heat sink 3 attached carrier structures 2 getting closed. Coolant inlet 4 and returns 5 are formed by bores introduced into the solid profile. Alternatively, the heat sink 3 be poured in the desired manner, possibly also in several pieces.

The LED lamp module according to the invention is primarily intended for industrial use in preparative photochemistry, with or without catalysis, and for AOPs or disinfection purposes, the lamp module, unlike the known LED lamp modules used in biophotoreactors, must meet increased requirements. These include, in particular, reaction temperatures and pressures deviating from room temperature and ambient pressure, which prevail in the reaction space around the lamp module, and which also include temperatures below + 5 ° C. and above + 40 ° C., and pressures in the range of high vacuum and 6 bar overpressure. Furthermore, the light sources used in photoreactors - depending on the composition of the reaction volume - pay attention to the explosion protection; the LED lamp modules according to the invention can also be used in ATEX classified areas in certain embodiments.

The example in 7 shows for this purpose a lamp module according to the invention 10 that in a dip tube 11 is arranged. The headboard 12 is sealed in the dip tube 11 stored, so that by Inertgaszufuhr over the line 18 that are here through the headboard 12 and the heat sink 3 extends, in the immersion tube interior 19 around the LED body an inert gas atmosphere, such as nitrogen or other inert gas, are generated with a certain pressure over the atmospheric pressure and thus the explosion protection of the lamp module 10 can be improved because no explosive air mixtures can penetrate the headboard or the LED body. For this embodiment of the lamp module 10 can for the sealing arrangement be provided that the headboard 12 and a corresponding receiving portion of the dip tube 11 are formed at least partially corresponding with respect to shape and dimensions, alternatively adapter pieces or sealing elements may be provided. The cross-sectional shape of the heat sink 3 is of the cross-sectional shape of the head part 12 independently. About the closed with valve inert gas discharge 18 For example, the overpressure can be drained off. Alternatively, the inert gas supply and removal can be regulated in such a way that an inert gas purge is carried out under said overpressure. For this, the inert gas flows as in 7 outlined below from the heat sink 3 or alternatively through a suitably arranged tube (or tube) and out past the LEDs on the outside to the pressure-dependent outlet valve controlled inert gas discharge. Due to the inert gas atmosphere or rinsing the inner region of the dip tube is rendered inert. The maintenance can be done via a continuous flow or a leakage compensation compensation with a corresponding control, measuring and control unit (preferably ATEX certified). To protect the sensitive semiconductor components, however, the maximum overpressure in the dip tube should not exceed 15 mbar. Thus, the type of protection "p" acc. Implement ATEX directive (pressurized enclosure).

The material of the dip tube 11 is chosen to be that of the LEDs 1 emitted radiation is transparent and withstands the reaction pressure in the surrounding reaction space. Filters for unwanted wavelengths as with conventional radiation sources are not required because the desired wavelength by appropriate doping of the LEDs 1 can be adjusted.

For a thermal decoupling of the dip tube interior from the surrounding reaction space, a lamp module according to the invention can be formed with an additional or a double-walled dip tube, so that the gap formed between the dip tubes or the gap present in the double-walled dip tube can be evacuated or connected to a cooling circuit for fluid cooling. As cooling fluid are all media that do not absorb the emitted radiation of the LEDs, such as water or other liquids. But also a gas flush comes into consideration here. Both devices - thermal decoupling and explosion protection - can also be used independently for different versions of the lamp module.

In general, an LED lamp module according to the invention can have at least one temperature sensor on the carrier structure or the circuit board, which ensures a protective shutdown for the protection of the semiconductor components, as long as the maximum permissible ambient temperature is exceeded. When falling below the maximum temperature, the control device can switch on the corresponding LEDs again automatically. All safety-related sensors of the lamp module can be redundant or 2-channel designed to realize the correspondingly necessary SIL class.

Since the LEDs are housed in groups on the support structures, they can be replaced individually in case of failure.

Furthermore, the lamp module according to the invention is suitable for providing process-specific spectra, wherein the radiation intensity can also be adapted to the photochemical process by means of a control circuit. Thus, a power control of the LEDs (dimming) for process control can be done because in many reactions, the absorption during the process changes. This can be responded to by targeted measurement and control circuits and lamp dimming in order to realize an efficient system and to avoid over-irradiation.

A lamp module according to the invention can have monochromatic LED as well as a mixture of LEDs with different emission spectra, which represents the optimal utilization of the absorption spectrum of the respective reaction. The same applies if the diving lamps are to be used for bioreactors. Here, LEDs with different emission wavelengths can be implemented on a support structure to achieve optimal growth rates. In different growth phases or different cells, optimally mixed light spectra and intensities can be provided for optimized growth.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2010/0267125 A1 [0005]

Claims (10)

Lamp module ( 10 ) for photochemical reactors containing a heat sink ( 3 ), on the outside of which at least one support structure ( 2 ) with at least one light emitting diode (LED) ( 1 ) is arranged, and a head part ( 12 ) for the electrical connection of the at least one LED ( 1 ) and for holding the lamp module ( 10 ), wherein the heat sink ( 3 ) at least one fluid path (a) bounded, the at least one feed section ( 4 ) and at least one return section ( 5 ), wherein the at least one feed section ( 4 ) over the head part ( 12 ) with a coolant source (Q) and the at least one return section ( 5 ) over the head part ( 12 ) is fluidically connectable to a coolant return (R), characterized in that the heat sink ( 3 ) at least one chamber ( 6 ) at least partially limited by the at least one power supply and / or control line ( 15 ) from the headboard ( 12 ) to a contact element ( 1' ) of the at least one LED ( 1 ). Lamp module ( 10 ) according to claim 1, characterized in that a number and size of the chamber (s) ( 6 ) is suitable, the totality of the LEDs ( 1 ) of the lamp module ( 10 ), wherein a predetermined number of LEDs ( 1 ), preferably on a common carrier structure ( 2 ) are arranged, in each case with at least one of the power supply and / or control lines ( 15 ) connected is. Lamp module ( 10 ) according to claim 1 or 2, characterized in that the heat sink ( 3 ) at least one longitudinal axial and central feed section ( 4 ) and several return sections ( 5 ) axially parallel to the feed section (FIG. 4 ), or that the chamber ( 6 ) or one of the chambers ( 6 ) longitudinally and centrally in the heat sink ( 3 ) runs. Lamp module ( 10 ) according to claim 3, characterized in that in the longitudinal axial and central feed section ( 4 ) the chamber ( 6 ) concentrically about the longitudinal axial and central feed section ( 4 ) is arranged, or a plurality of axially parallel chambers ( 6 ) - inside the heat sink ( 3 ) are provided or - by incisions of the heat sink ( 3 ) on its outside in conjunction with the at least one on the heat sink ( 3 ) arranged carrier structure ( 2 ) are formed. Lamp module ( 10 ) according to at least one of claims 1 to 4, characterized in that the heat sink ( 3 ) according to the number and arrangement of the LEDs ( 1 ) on the at least one support structure ( 2 ), wherein an arrangement of the LEDs ( 1 ) on the support structure ( 2 ), which are on the heat sink ( 3 ) is arranged, a course of the return sections ( 5 ) within the heat sink ( 3 ) corresponds. Lamp module ( 10 ) according to at least one of claims 1 to 5, characterized in that - on the head part ( 12 ) at least one electrical connection device ( 7 ) for connecting the at least one power supply and / or control line ( 15 ) with a power supply and control device ( 16 ) of the lamp module ( 10 ) is provided, or the head part ( 12 ) the power supply and control device ( 16 ) for the at least one LED ( 1 ), wherein the head part ( 12 ) has at least one coolant path for cooling the power supply and control device, which preferably with the in the heat sink ( 3 ) coolant path (a) is connected, and - coolant connection devices ( 8th ) for connecting the feed and return sections ( 4 . 5 ) via coolant lines ( 13 ) with the coolant source (Q) and the coolant return (R), and - at least one mechanical connection device ( 9 ) for connecting the head part ( 12 ) with a holder ( 14 ) is provided. Lamp module ( 10 ) according to at least one of claims 1 to 6, characterized in that the number of fluid paths (a) extending through the heat sink ( 3 ) with respect to a predetermined cooling capacity corresponding to the total number of LEDs ( 1 ) of the lamp module ( 10 ), wherein in each case a fluid path (a) for cooling a predetermined number of LEDs ( 1 ) is provided, which defines a cooling group, wherein the at least one feed section ( 4 ) of the fluid path (a) for a first cooling group at the head end of the heat sink ( 3 ) and each further feed section ( 4 ) for a fluid path (a) of a further cooling group at a height along the length of the heat sink ( 3 ), which a lateral surface portion of the heat sink ( 3 ) at which the LEDs ( 1 ) are arranged each other cooling group. Lamp module ( 10 ) according to at least one of claims 1 to 7, characterized in that the lamp module ( 10 ) at least one dip tube ( 11 ), in which at least the heat sink ( 3 ) is arranged, on the outside of which at least one support structure ( 2 ) with the at least one light emitting diode (LED) ( 1 ), one for the wavelengths of the LEDs ( 1 ) of the lamp module ( 10 ) emitted radiation has permeable material, wherein the dip tube ( 11 ) in terms of material and shape for a reaction pressure in a dip tube ( 11 ) surrounding reaction space is designed for a range of high vacuum to 6 bar overpressure, wherein the head part ( 12 ) with a first end of the dip tube ( 11 ) is connected fluid-tight and resiliently mounted, and that the dip tube ( 11 ) is closed at its second end, preferably by a closure part, wherein an inert gas supply channel through the head part ( 12 ) in the room ( 19 ) between the dip tube ( 11 ) and the heat sink ( 3 ), Lamp module ( 10 ) according to at least one of claims 1 to 8, characterized in that the lamp module ( 10 ) has at least one temperature sensor located on the support structure ( 2 ) and with the power supply and control device ( 16 ), which provides a circuit breaker for the LEDs ( 1 ), and / or that - the power supply and control device ( 16 ) has at least one control circuit for an LED drive, with the same or different LEDs ( 1 ) are dimmable and / or the spectrum of the emitted wavelengths of different LEDs ( 1 ) is changeable. Photoreactor with a lamp arranged therein with a suitable emission spectrum for the photochemical reaction, characterized in that the lamp is a lamp module ( 10 ) according to at least one of claims 1 to 9.

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