LED lamp module and device for photochemical reaction

Abstract

The invention provides an LED lamp module (1) and a device (100) for photochemical reaction with such an LED lamp module (1). The LED lamp module (1) is configured to be arranged in a device (100) for carrying out photochemical reactions and has a plurality of LEDs (3) and a shaped support (6) for fastening the LEDs (3), the support (6) being arranged together with the LEDs (3) in an internal space (11) of the LED lamp module (1), the internal space being defined by transparent wall elements (10, 10a) and housing elements (12, 15). The transparent wall elements (10, 10a) are arranged corresponding to the LEDs (3), and at least one power line (7) extends through the housing elements (12, 15) to electrically connect the LEDs (3). The LEDs (3) are divided into LED groups (2) and connected in series in each LED group (2), and each LED group (2) is assigned a drive device (4) and is connected to the drive device (4) as a constant current source (Ikonst) for operating the LEDs (3) of the respective LED group (2). Each drive device (4) is arranged on a support body (6) in the interior space (11) of the LED lamp module (1) adjacent to the LED group (2) to which it is assigned, and each drive device (4) is connected in series with the respectively assigned LED group (2) and forms an LED current branch. The LED current branches are connected in parallel, and the LED current branches connected in parallel are connected to a constant voltage source (Ukonst) via a power supply line (7).

Description

Technical Field

[0001] The invention relates to an LED lamp module which is designed for use in an apparatus for carrying out photochemical reactions on an industrial scale with a high number of LEDs or a high LED density, and to an apparatus for carrying out photochemical reactions having at least one such LED lamp module. Background Art

[0002] To date, low- or medium-pressure radiators are still frequently used to carry out photochemical reactions on an industrial scale, where the reaction chamber can reach several meters in diameter, since they can have dimensions of the corresponding order of magnitude. However, their operation involves high power consumption and, with age, they need to be checked regularly at relatively short intervals, since the radiation intensity decreases significantly and the radiation spectrum may change.

[0003] Thus, compared to conventional low- or medium-voltage radiators, LED lamps have low power consumption, long lifetime and high switching resistance and have spontaneous full light flux. In this context, photochemical reactions are considered to be all processes induced by photons, such as photochemical or photocatalytic synthesis, so-called AOPs (advanced oxidation processes) and UV disinfection of water and surfaces.

[0004] If LEDs are to be used as immersion lamps in photoreactors for chemical synthesis (e.g. photochlorination or photobromination), the lamp modules used must not only meet higher requirements for the surrounding reaction conditions, which may deviate significantly from ambient pressure and room temperature, but must also have dimensions adapted to the size of the reaction space. The use of LEDs as lamp modules on an industrial scale is limited by the number and density of LEDs, which is possible because they operate at low voltages and high current intensities required for high radiant powers. If the LEDs are operated at high currents to obtain high light output or radiant intensity, effective heat dissipation from the LEDs is required to maintain their service life in order to avoid local high temperatures. In order to dissipate heat effectively, the LEDs are arranged on a support, usually a metal, which may have structures for dissipating heat, such as cooling channels through which a cooling fluid passes. It is also known to directly cool the LEDs with a moderately non-conductive coolant. However, even with effective heat dissipation, running the LEDs at maximum power for photochemical reactions is detrimental to the life of the LEDs.

[0005] DE 102014012219 B4 discloses an LED lamp module for photochemical reactions with a significantly increased number of LEDs, for adjusting the size for industrial scale. In this case, the support body for the LEDs has a cooling path, which is connected to the cooling circuit via the head of the lamp module. In order to improve the current supply, the support body is also formed with at least one longitudinal axial or axially parallel chamber for the current supply / control line to extend from the head to the contact elements of the LED through the chamber. The power supply and control device can include, for example, a power supply or power electronics, a driver and a power supply, in this case an external power supply and control device, which is arranged outside the photoreactor and connected by the electrical connection device of the head. Optionally, the power supply and control device can be accommodated in the head so that the temperature-sensitive power electronics or LED driver can be cooled by part of the cooling circuit provided for the LED.

[0006] For use as an immersion lamp in an apparatus for carrying out a photochemical reaction, the LED lamp module is usually arranged in a transparent sleeve, which is usually closed on one side. A head for supplying power to the LED lamp module can close the open end of the sleeve. The support body can have a hexagonal or octagonal cross section, thereby providing six or eight sides, on which the LEDs can be fixed. For this purpose, the LEDs are usually arranged in a predetermined number on a circuit board with corresponding conductor tracks for connecting the LEDs. Each circuit board arranged on the side of the support body forms an LED string operated by a driver. For example, with a string voltage of 300V and an LED forward voltage of 4V, the maximum number of LEDs per string that can be operated with a driver is 75. At present, the maximum total length of the circuit board is about 50cm, each circuit board is equipped with 18 or 15 LEDs, and 4 or 5 circuit boards connected in series form a string, so that the maximum length of the lamp module is 200 to 250cm. If an LED string with the maximum number of LEDs is arranged on each side of the hexagonal or octagonal support body, the LED lamp has 450 or 600 LEDs.

[0007] Depending on the process and the desired uniformity, a density of 0.375 to 0.3 LED / cm can be achieved with 75 LEDs per string over a length of 200 to 250 cm, which may be clearly too small. However, due to the limitation of the 300V ballast voltage per string, a higher density, i.e. a higher number of LEDs per centimeter of luminous length, can only be achieved by shortening the LED lamp module, which conflicts with the desired extension of the lamp module to adapt to the dimensions of the reaction chamber on an industrial scale. In addition, each ballast or driver requires two connection contacts, for example by plugging into the lamp head. If a corresponding LED string is arranged on each side of the hexagonal or octagonal support, six or eight ballasts / drivers are required accordingly, and then 12 or 16 connection contacts are required. At a given diameter of the lamp or head, the space available for connection is limited. This also limits the number of ballasts or drivers that can be connected to the LED lamp to operate the LED string in each case.

[0008] Therefore, in order to provide the high LED densities required for photochemical reactions, in particular in the case of lamp lengths exceeding 200 to 250 cm, it is not possible to upgrade LED lamps with a significantly higher number of LEDs, since for very high numbers of LEDs a correspondingly large number of ballasts / drivers are required, each with two connection contacts, and the space for the connections on the lamp head is limited. Summary of the invention

[0009] Starting from the prior art, the object of the present invention is to provide a scalable LED lamp module which is configured for photochemical reactions on an industrial scale and has an improved LED density.

[0010] This object is achieved by an LED lamp module having the features of claim 1 .

[0011] A further object of the invention is to provide a device for performing photochemical reactions having an improved LED lamp module, which is solved by a device having the features of independent claim 15 .

[0012] Developments and preferred embodiments are set forth in the dependent claims.

[0013] According to a first embodiment, the LED lamp module according to the present invention is configured to be arranged in a device for performing a photochemical reaction, and has a plurality of LEDs and a shaped support body. The LED is fastened to the support body, and the support body is arranged together with the LED in the interior of the LED lamp module, which is defined by a transparent wall element and a housing element. The transparent wall element is arranged corresponding to the LED, and at least one power line extends through the housing element for the electrical connection of the LED. In this case, the plurality of LEDs are divided into LED groups having a predetermined number of LEDs, the LEDs of each LED group are connected in series, and each LED group is respectively assigned a driving device and connected to the driving device as a constant current source for operating the LEDs of the corresponding LED group. According to the present invention, each driving device is arranged on the support body inside the LED lamp module, adjacent to the LED group to which it is assigned, and each driving device is connected in series with the corresponding assigned LED group and forms an LED current branch. In this case, the LED current branches formed by the driving devices with the LED groups are connected in parallel, and the parallel-connected LED current branches are connected to the constant voltage source via the power line. The constant voltage of the constant voltage source is converted into a constant current by the driving devices of each LED group.

[0014] With the aid of the hybrid circuit for powering LEDs according to the invention, which comprises elements of a series circuit and a parallel circuit, the LED lamp module can be scaled simply by multiplying the parallel LED current branches, thereby significantly increasing the number of LEDs without increasing the number of power supply lines with electrical connections at the housing element required for this purpose, since the voltage of the parallel LED current branches is constant.

[0015] Here, the term "supply line" includes the forward and return conductors of the LED circuit and the LED current branches connected in parallel. In this case, the LED lamp module can have more than one LED circuit, each LED circuit having a supply line as described above. For each supply line, a connecting device is provided on the housing element, which correspondingly has two connection contacts for the forward and return conductors of the supply line. The supply line can be connected to the cable by means of the forward and return conductors via a connecting plug with two connection contacts. However, it is also possible to provide separate cables for the forward and return conductors of the supply line, each cable having a connecting plug with one of the connection contacts.

[0016] Advantageously, based on the hybrid circuit, the LED lamp module according to the present invention can not only be designed to a desired length, even exceeding 200 cm, but can also be variably adapted to the requirements of the corresponding photochemical reaction in terms of LED density, power density and LED forward voltage. This is because the power density required for performing a photochemical reaction may vary greatly. For example, an LED lamp module with a high LED density and low power is suitable for performing a photochlorination reaction, while a LED lamp module with a high LED density and high power is required for performing a photoredox reaction. Based on the hybrid circuit, the LED lamp module according to the present invention can preferably be designed to have an LED density of at least 125 LED / m and / or a power density of at least 35 W / m and / or an LED forward voltage of at least 3 V per LED, and the required length is even greater than 200 cm.

[0017] According to other embodiments of the LED lamp module of the invention, the predetermined number of LEDs of all LED groups is the same and is at most 25. In the case of an exemplary forward voltage of each LED of 4 V, the constant voltage of the constant voltage source is at most 100 V. Preferably, the predetermined number of LEDs can be at most 20, so that the constant voltage of the constant voltage source is at most 80 V, and an exemplary forward voltage of each LED is 4 V. In particular, the predetermined number of LEDs is at most 15, so that the constant voltage of the constant voltage source is at most 60 V, and an exemplary forward voltage of each LED is 4 V. Due to the parallel connection of the LED groups with the assigned drive means, the constant voltage can be significantly reduced compared to the prior art. An embodiment with an advantageous low voltage of at most 60 V DC may be preferred, because an ATEX connector with suitable dimensions can be used to connect the power supply line to the housing element, so that the LED lamp module can be used in explosion-hazardous areas, for example, if the starting materials or products of the photochemical reaction with air can form an explosive atmosphere.

[0018] According to another embodiment of the LED lamp module according to the invention, the LED current branches of the LED groups with their assigned driver devices can be constructed as integrated switching modules fastened to a circuit board of a support body, wherein one or more LED groups with corresponding driver devices are arranged on each circuit board. In this way, the circuit boards create a modular system with which the LED lamp can be flexibly designed and expanded. There are no restrictions on the length of the lamp module or the number of LED current branches or circuit boards.

[0019] In addition, the LED lamp module according to the present invention can be improved so that each LED group is equipped with at least one control and / or adjustment element and at least one measuring device, which is selected from a group that can include a current measuring device, a voltage measuring device, a temperature measuring device and a photon measuring device. As an alternative or supplement to at least one measuring device, each LED group can also be assigned at least one switching element. In this case, the control and / or adjustment element is communicatively connected to at least one measuring device and is configured to manipulate the switching element according to the measured value detected by at least one measuring device so as to turn on or off and / or dim the LED of the assigned LED group according to the measured value. Of course, for this purpose, the control and / or adjustment element can also be communicatively connected to at least one switching element. In addition, the control and / or adjustment element can be configured to manipulate the driving device of the assigned LED group for adjusting a constant current so as to operate the LED of the assigned LED group at a predetermined power.

[0020] Correct operation can be ensured by current and voltage measurements for each LED group on the integrated circuit board. In the event of a fault, such as a failure of an LED in an LED group detected by the integrated current and voltage measurement, the assigned LED group can be switched off, thereby avoiding overloading of the remaining LEDs in the group. The failure of one LED can create hot spots, which can lead to failures of other LEDs and thus to other hot spots, which can be reliably avoided by switching off in explosive environments where the LED lamp module may be located, thereby improving explosion protection. Hot spots can also be determined using an integrated temperature measurement, but this is mainly used to ensure that the LEDs provide the required radiant power, whose light output depends not only on the current but also on the temperature. The temperature measurement can therefore ensure that the LEDs are operated within a predetermined temperature window, thereby preventing the LEDs from getting too hot. The optional photon measurement can also be used to adjust the light output of the LED group.

[0021] According to a further embodiment, the measuring device and / or the switching element, such as the driver, can be arranged as an integrated switching module on a printed circuit board of the associated LED group.

[0022] Likewise, according to another embodiment of the LED lamp module according to the present invention, the control and / or regulating element can be configured as an integrated switch module on the circuit board of the assigned LED group. Optionally, each control and / or regulating element assigned to the LED group can be arranged outside the internal space. In both cases, the control and / or regulating elements of all LED groups are communicatively connected to each other and / or to the superior control and / or regulating unit, and are configured to match the predetermined radiation power of the LEDs of each LED group to each other so as to achieve a uniform total radiation power. Alternatively, individual LED groups can be turned on and off so that only part of the LED lamp module is used to emit radiation. In addition, the control and / or regulating units connected together and / or connected to the superior control and / or regulating unit can be configured to assign a unique ID to each LED group and / or detect the operating data and / or operating time of each LED group.

[0023] A further embodiment of the LED lamp module according to the invention can provide that the LED lamp module has at least one power supply track for receiving at least one power supply line in the inner space.

[0024] According to a preferred embodiment of the LED lamp module according to the present invention, the support body comprises a support cage having a grid structure, a support structure to which the LED group is fastened, and at least one supporting structure for positioning the LED group fastened to the support cage within the inner space.

[0025] According to an advantageous embodiment, at least one power supply track may be provided by at least one track structure of the support cage, so that the LEDs are not shaded by the power supply lines.

[0026] Furthermore, according to another embodiment, the LED lamp module according to the invention can comprise a cooling circuit with a non-conductive liquid, the housing element having an inflow connection and an outflow connection for connecting the interior space to the cooling circuit, so that the interior space is completely filled with the non-conductive liquid. Thus, the driver and the LED and possibly other switch modules can be cooled together by the non-conductive liquid. This cooling is particularly effective when the support body is designed as a support cage.

[0027] According to a particular embodiment, the LED lamp module according to the invention is configured as an immersion lamp with a longitudinal axis, the transparent wall element being a transparent sleeve closed on one side, which is arranged coaxially with the LED around the support body. The housing element has a head arranged at the open end of the sleeve.

[0028] In a further development thereof, the support body configured as a support cage has at least one support structure for positioning in the inner space at at least one longitudinal axial end, wherein the support structure is configured to be arranged centrally at the head and / or the closed end of the sleeve. Optionally or additionally, the head has a passage opening, and the inflow connector and the outflow connector each extend through one of the passage openings or are connected to one of the passage openings. In this case, the inflow connector is preferably connected to a pipe structure on the inner space side, which is arranged in the support body configured as a support cage and extends longitudinally through the support cage as a coolant inflow section, which provides an inflow opening at the end of the inner space away from the head. At the end of the inner space close to the head, an outflow opening is provided by an outflow connector extending through the head or by a passage opening connected to the outflow connector.

[0029] As an alternative to the immersion lamp, according to another embodiment, the LED lamp module according to the present invention can be configured as a surface radiator, the transparent wall element is a transparent flat window glass, and the housing element is a housing having a base and side walls. The window glass closes the opening surface defined by the side wall, wherein the LED arranged on the support is arranged in a plane parallel to the window glass between the window glass and the base.

[0030] According to a refinement of the device according to the invention, a support body configured as a support cage with at least one support structure is arranged on a base of the housing, wherein the support structure to which the LED is fastened is formed on the side of the support cage facing away from the at least one support structure. In this case, the dimensions of the support cage between the support structure and the at least one support structure determine the distance of the LED from the window pane. Alternatively or additionally, the housing has at least one inflow opening connected to the inflow connection piece and at least one outflow opening connected to the outflow connection piece on opposite sides of the interior space.

[0031] According to a first embodiment, the device for performing a photochemical reaction according to the invention also has a photoreactor on or in which at least one lamp module is arranged, which emits radiation with a wavelength suitable for the photochemical reaction, and is an LED lamp module according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Further embodiments and some advantages associated with these and further embodiments will become clear and more easily understood through the detailed description below with reference to the accompanying drawings. Substantially identical or similar objects or parts thereof may have the same reference numerals. The accompanying drawings are only schematic diagrams of embodiments of the invention.

[0033] In the attached picture:

[0034] Figure 1A schematic diagram showing a device for photochemical reaction with a prior art LED lamp module;

[0035] Figure 2 A schematic diagram of a device according to the invention for performing a photochemical reaction with an LED lamp module according to the invention is shown;

[0036] Figure 3 A schematic diagram showing an LED group of an LED lamp module according to the present invention is shown;

[0037] Figure 4 shows a side view, partly in section, of an LED lamp module according to the invention in an embodiment as an immersion lamp;

[0038] Figure 5 Shown according to Figure 4 A cross-sectional view of the LED lamp module of the present invention along the section line XX;

[0039] Figure 6 A top view of an LED lamp module according to the present invention is shown in an embodiment as a surface radiator;

[0040] Figure 7 Shown according to Figure 6 A longitudinal cross-sectional view of the LED lamp module of the present invention along the cross-sectional line YY;

[0041] Figure 8 A schematic diagram of a device according to the invention for photochemical reaction with an LED lamp module according to the invention as an embodiment of an immersion lamp is shown;

[0042] Fig. 9 A schematic diagram of a device according to the invention for carrying out a photochemical reaction with an LED lamp module according to the invention as an embodiment of a surface radiator is shown. DETAILED DESCRIPTION

[0043] The present invention relates to an LED lamp module, which is configured to be used in a device for performing a photochemical reaction. The photochemical reaction has a matching LED density, power density and LED forward voltage, and the required length may also be greater than 200 cm.

[0044] The LED lamp module may have an LED density of at least 125 LEDs / m and / or a power density of at least 35 W / m and / or a forward voltage of at least 3 V per LED.

[0045] In addition, the present invention also relates to a device for performing a photochemical reaction, which comprises the LED lamp module according to the present invention.

[0046] In the prior art, the LED lamp module 1' is used to perform photochemical reactions, such as Figure 1 Schematically shown, an LED lamp module 1 ' can be used as an immersion lamp in a photoreactor 101 in order to expose a medium initially placed therein to electromagnetic radiation, thereby inducing the desired photochemical reaction. For industrial-scale conversions, the photoreactor must have dimensions of several meters, which requires lamps of corresponding dimensions in order to achieve uniform illumination of the reactor volume. In contrast to conventional low- or medium-pressure radiators of corresponding dimensions, the length of the prior art LED lamp module 1 ' is limited at the LED density predetermined for the minimum power.

[0047] The LED string 2' can have up to 75 LEDs 3 connected in series, which are operated by a driver 4' providing a constant current Ikonst with a maximum string voltage of 300 V. If these 75 LEDs are distributed over four or five boards 5 with a maximum board length of 50 cm, a lamp length of 200 or 250 cm can be achieved for the LED lamp module 1' or the LED lamp string 2'. However, this is associated with an LED density of 37.5 LED / m or 30 LED / m, which may be clearly insufficient depending on the process and the desired uniformity. Although higher LED densities are possible for shorter LED lamp modules 1', this is disadvantageously associated with uneven illumination of the correspondingly large volume of the photoreactor 101.

[0048] Another limitation of the LED lamp module 1' of the prior art is that a corresponding driver 4' must be provided for each LED string 2'. An LED lamp module 1' having six or eight LED strings 2' requires six or eight drivers 4', respectively, which are usually accommodated in a separate switch cabinet 102 spaced apart from the photoreactor 101 for connection to the voltage source Ukonst. Furthermore, since the LED lamp module 1' must have a connection device 7a' at the head 15' for each LED string 2' in order to be connected to the assigned driver 4' via a power line 7', each connection device 7a' having two connection contacts for the forward and return conductors of the power line 7', the number of LED strings 2 is limited by the space available for the connection contacts at the LED lamp module 1'.

[0049] The LED lamp module 1 designed according to the present invention overcomes the limitations of the prior art. Figures 2 to 7 Various examples are shown in : an LED lamp module 1 for a device 100 for performing a photochemical reaction has an LED density of at least 125 LEDs / m and / or a power density of at least 35 W / m and / or a forward voltage of at least 3 V per LED, independent of the lamp length.

[0050] Figure 2 The use of an LED lamp module 1 in a device 100 for performing a photochemical reaction is schematically shown. Figure 8 and 9A further example of a device 100 for photochemical reactions with differently designed LED lamp modules 1 is shown. In each LED lamp module 1, a plurality of LEDs 3 are fastened to a support 6, the shape of which is adapted to the geometry of the LED lamp module 1 and which provides at least one surface for fastening the LEDs 3. By the orientation of the fastening surface, the radiation direction of the LEDs 3 is predetermined, by which the radiation characteristics of the LED lamp module 1 are defined. In this case, the radiation characteristics can be modified by using reflective, refracting and / or filtering elements.

[0051] Figure 4 and Figure 5 An LED lamp module 1 is shown as an example configuration of an immersion lamp 1A, wherein the support body 6 comprises the shape of a geometric prism with a longitudinal axis A. Alternatively, the support body of the immersion lamp can also have a cylindrical shape. The LEDs 3 are fastened in the form of LED groups 2 on the circumferential surface of the prismatic support body 6, so that the radiation direction of the LEDs 3 of the LED groups 2 of the immersion lamp 1A extends essentially radially to the longitudinal axis A. Figure 6 and 7 Another example shown is an LED lamp module 1 configured as a surface radiator 1B, wherein the support body 6 has a rectangular parallelepiped shape with side surfaces providing a planar fastening surface for arranging the LEDs 3 in a plane B, so that the radiation direction of the LEDs 3 of the LED surface radiator 1B is substantially orthogonal to the plane B. Figures 4 to 7 In the figure, each LED group 2 is shown as an ellipse in a simplified manner; for the sake of clarity, the LED groups 2 are omitted. Figure 2 and Figure 3 Representation of the individual LEDs 3 shown.

[0052] It is understood that the LED lamp module 1 according to the invention can also have a shape of the support body that differs from the two examples, in order to obtain a modified lamp geometry for different main radiation directions, depending on the intended use. Furthermore, if, for example, a rotationally symmetrical radiation characteristic is not required or desired for an immersion lamp, the entire circumferential surface of the prismatic or cylindrical support body does not have to be used as a fastening surface for the LED. On the other hand, a modification of the surface radiator can provide that more than one side surface of the parallelepiped support body is used as a fastening surface, in order to obtain, for example, a radiation direction in an opposite direction orthogonal to plane B or a radiation direction orthogonal and parallel to plane B.

[0053] Each LED lamp module 1 also has a transparent wall element 10, 10a and a housing element 12, 15, which together define an interior space 11, in which a support 6 is arranged, on which the LED 3 is arranged, so that the transparent wall element 10, 10a is arranged corresponding to the LED 3 in order to allow the radiation emitted by the LED 3 to escape. The respective housing element 12, 15 has one or more connection means 7a for connection to (in each case) a power supply line 7 for the electrical connection of the LED 3.

[0054] exist Figure 4 and Figure 5 In the case of the immersion lamp 1A in FIG. 1 , the transparent wall element is a sleeve 10 closed on one side, which is arranged coaxially with the LED 3 around the support 6. The housing element is a head 15 provided at the open end of the sleeve 10. As an alternative to the shown example of a sleeve 10 closed on one side, in which the bottom closing the end remote from the head is formed integrally with the sleeve wall, the end of the sleeve remote from the head which is open on both sides can be closed by a plug.

[0055] Figure 6 and Figure 7 The surface radiator 1B has a plane flat window glass 10a as a transparent wall element, and the housing element is configured as a housing 12 having a base 12a and a side wall 12b. The side wall 12b defines an open surface spaced apart from the base 12a and closed by the window glass 10a. The support 6 is arranged on the base 12a so that the fastening surface with the LED 3 faces the window glass 10, and the LED 3 arranged on the support 6 is arranged in a plane B parallel to the window glass 10a between the window glass 10a and the base 12a. If it is provided in a variant that more than one side of the rectangular support is configured as a fastening surface with an LED, the housing can be modified accordingly so as to arrange an additional window glass corresponding to the fastening surface with the LED. To this end, the base and / or the side wall can be formed with corresponding window openings for arranging other window glasses relative to the LED.

[0056] For electrical connection, the LEDs 3 are divided into LED groups 2, and the LED groups 2 have a predetermined number of LEDs 3 connected in series, such as Figure 2 For clarity, Figures 4 to 7 In the embodiment, only LED groups 2 are shown, instead of individual LEDs 3. Each LED group 2 is respectively connected to a driver 4, which provides a constant current Ikonst for the operation of the LEDs 3 of the respective LED group 2. In this case, the driver 4 is arranged together with the respective assigned LED group 2 on a support 6 in the interior space 11 of the LED lamp module 1. Figure 2As shown, each LED group 2 forms an LED current branch with the assigned series-connected driver 4 , wherein the LED current branches are connected in parallel and connected to an external constant voltage source Ukonst via a power supply line 7 .

[0057] Due to the parallel connection of the LED groups 2 which can be powered by a single power supply line 7, the number of connection devices 7a on the housing element 15 required for a predetermined number of LEDs is significantly reduced, since no longer one connection device per LED string is required as in the prior art. However, this does not mean that the LED lamp module 1 according to the invention is limited to embodiments with connection devices 7a for an LED circuit having a plurality of parallel LED current branches, each of which comprises a driver device 4 having an LED group 2. On the contrary, if Figures 4 to 7 As shown in the example in, the LED lamp module 1 can have a plurality of LED circuits with a plurality of LED current branches connected in parallel, and a connection device 7a is provided for the power supply line 7 of each LED circuit at the housing elements 12, 15. In this case, each connection device has two connection contacts for the forward and return conductors of the power supply line 7. The two connection contacts can be formed together in one connection plug or in two connection plugs. Without having to increase the number of connection devices 7a, the LED lamp module 1 according to the invention can be simply scaled, in particular extended, by multiplying the LED groups 2 connected in parallel with the assigned drivers 4, without having to reduce the LED density. Therefore, even in the case of longer lamp modules, a high LED density or power can be achieved, thereby achieving the greatest possible illumination uniformity.

[0058] And unlike the prior art, in which the LED is operated at maximum power to obtain sufficiently high photon power for photochemical reactions, the LED 3 of the lamp module 1 according to the present invention can be used with a high forward current and can be operated under dimming to ensure a long LED life.

[0059] The LED group 2 connected to the power supply line 7 and connected in parallel has a constant number of LEDs 3, for example 15. Figure 2 and Figure 3As shown. At a forward voltage of 4 V, the supply voltage of the constant voltage source Ukonst is only 60 V DC, so that the ATEX connector can also be advantageously used for connection to the housing element, and the LED lamp module 1 can be used in areas with a potentially explosive atmosphere. Basically, the LED group 2 of the LED lamp module 1 can also have more than 15 LEDs, so that the supply voltage of the constant voltage source Ukonst is correspondingly higher at a forward voltage of 4 V, as long as the housing element provides sufficient space for connecting the power supply line 7. Therefore, the use of the ATEX connector is limited, the ATEX connector has larger dimensions for higher voltages and depends on the size of the housing element.

[0060] In the example shown, each LED group 2 with an assigned driver 4 is constructed as an integrated switching module fastened to a circuit board 5 of a support body 6. However, in an alternative embodiment not shown, a plurality of LED groups 2 with assigned driver 4 can also be arranged together on a circuit board 5.

[0061] like Figure 3 As schematically shown, the control and / or regulating element 9, the measuring devices 9a, 9b, 9c, 9d and the switching element 9e can also be formed on the circuit board 5 as an integrated switching module assigned to the corresponding LED group 2. The current measuring device 9a, the voltage measuring device 9b, the temperature measuring device 9c and the photon measuring device 9d can be used as the measuring devices 9a, 9b, 9c, 9d, but it is not necessary to be as Figure 3 It is also possible to assign only one current measuring device 9a and / or one voltage measuring device 9b to the LED group 2. The temperature measuring device 9c and / or the photon measuring device 9d can also be assigned to multiple LED groups 2, or arranged independently of the groups in the inner space 11 on the support 6.

[0062] The control and / or regulating element 9 assigned to the LED group 2 is not only communicatively connected to the corresponding driving device 4, but also communicatively connected to the corresponding measuring device 9a, 9b, 9c, 9d and the switching element 9e, so as to actuate the switching element 9e and / or the driving device 4 according to the measured values ​​detected by the corresponding measuring device 9a, 9b, 9c, 9d. By actuating the switching element 9e, the LED 3 of the assigned LED group 2 is switched on or off according to the measured value. For example, if the temperature measuring device 9c detects an excessively high temperature of one or more LEDs 3 of the LED group 2 and / or the current and / or voltage measuring devices 9a, 9b detect a fault, the LED group 2 can be switched off. The driving device 4 is actuated to adjust the constant current Ikonst in order to operate the LED 3 of the assigned LED group 2 at a predetermined radiant power, for example, when the photon measuring device 9d detects an excessively low photon density or to compensate for a fault of one or more LEDs 3 detected by the current and / or voltage measurement.

[0063] and Figure 3 Unlike the example of , in which the control and / or regulating element 9 is constructed as an integrated switching module on the circuit board 5 of the assigned LED group 2, in a variant not shown, the control and / or regulating element 9 assigned to the LED group 2 can be arranged outside the interior space 11. In both cases, as Figure 3 As shown, the control and / or regulating element 9 of the LED group 2 can be communicatively connected to the superior control and / or regulating unit 90 so as to coordinate the predetermined radiation power of the LED 3 of each LED group 2 to obtain a uniform total radiation power. Alternatively, the control and / or regulating element 9 of the LED group 2 can be communicatively connected without the superior control and / or regulating unit 90 so as to coordinate the predetermined radiation power of the LED 3 of each LED group 2 to obtain a uniform total radiation power.

[0064] Furthermore, the control and / or regulating element 9 or the superordinate control and / or regulating unit 90 can assign an ID (e.g. an identification code) to each LED group 2 in order, for example, to identify a circuit board 5 in which a fault of an LED 3 not discernible by eye is detected. Thus, in the event of a fault, the affected LED group 2 can be switched off, thereby preventing an overload of the remaining LEDs 3 of the affected LED group 2. Furthermore, the operating data and / or operating time of each LED group 2 can be detected in order to simplify the maintenance of the LED lamp module 1.

[0065] like Figures 4 to 7 As shown, the support body 6 is not solid, but is designed as a support cage 6 with a grid structure, which corresponds to a skeleton structure composed of rods and / or surface elements surrounding openings connected to each other. In this case, the support cage 6 has a support structure 6a for fastening the LED group 2 or the circuit board 5 and a support structure 6b for positioning the arrangement in the inner space 11. The support structure 6a of the support cage 6 is formed by rods and / or surface elements, which are located Figure 4 and 5 In the prismatic surface of the LED immersed lamp 1A with a prismatic support cage 6. The support structure 6b, also formed by rods and / or surface elements, serves on the one hand to fasten the support cage 6 to the head 15 and on the other hand to support at the closed end of the sleeve 10, thereby ensuring a central arrangement inside the sleeve 10.

[0066] exist Figure 6 and Figure 7In the LED surface radiator 1B with a parallelepiped support cage 6, the support structure 6a and the support structure 6b are likewise formed by rods and / or surface elements, wherein the support structure 6a is located on the side of the parallelepiped facing the window pane 10a, and the support structure 6b is located on the side facing the base 12a and the side wall 12b of the housing 12. The distance of the LED 3 from the window pane 10a is determined by the size of the support cage 6 between the support structure 6a and the support structure 6b resting on the base 12a.

[0067] Furthermore, the support cage 6 has a rail structure 6c, which is also composed of rods and / or surface elements, which forms a bus or supply rail 6c, in which the supply lines 7 lead through the inner space 11 to the connection devices 7a on the housing elements 12, 15. By providing a cable duct in this way, located behind the LED 3 or the circuit board 5, respectively, shadowing of the LED 3 is avoided.

[0068] If the LED lamp module 1 has a cooling circuit K for circulating a non-conductive liquid L which completely fills the inner space 11 and the openings of the support cage 6 (see Figure 8 , 9 ), then the support cage 6 is particularly advantageous as a support 6 for the LED 3. In order to connect the interior space 11 to the cooling circuit K, the housing elements 12, 15 have an inflow connection 13 and an outflow connection 14, such as Figures 4 to 7 In this way, the non-conductive liquid L flows around the LED 3 or the circuit board 5 from both sides to absorb the heat generated by the LED 3 and the driver 4 (and optionally by other switch modules on the circuit board 5), which is released from the outside of the LED lamp module 1 through the cooling circuit K. For this purpose, in addition to the feed pump, the cooling circuit K generally also includes a heat exchanger.

[0069] exist Figure 4 and Figure 5 In the embodiment of the LED immersion lamp 1A shown, the head 15 has passage openings 15a through which the inflow connector 13 and the outflow connector 14 extend. The inflow connector 13 is connected to the duct structure 6d on the inner space side, and the duct structure 6d extends longitudinally axially through the support cage 6 as the coolant inflow portion 8. Therefore, the duct structure 6d provides an inflow opening 8a at the end of the inner space 11 away from the head, through which the non-conductive liquid L supplied via the inflow connector 13 flows from the coolant inflow portion 8 into the inner space 11. In order to discharge the non-conductive liquid L from the inner space 11, an outflow opening 14a is provided at the end of the inner space 11 close to the head, and the outflow opening 14a is provided by the eccentrically arranged outflow connector 14.

[0070] exist Figure 6 and Figure 7In the LED surface radiator 1B, the housing 12 has an inflow opening 12c connected to the inflow connection piece 13 and an outflow opening 12d connected to the outflow connection piece 12 on opposite sides of the interior space 11. The inflow opening 12c extends through the base 12a directly adjacent to the side wall and widens to form a groove leading to the interior space 11 parallel to the side wall. The outflow opening 12d extends through the opposite side wall in the center. This design of the inflow and outflow openings 12c, 12d should be understood as an example, in which case various modifications of the form and number of the openings or the distributor or collector elements between the connection piece and the opening are conceivable.

[0071] Figure 8 and 9 The device 100 shown for carrying out a photochemical reaction is also to be understood as an example. The device 100 according to the invention can be configured with a different number and / or arrangement of LED light modules 1 arranged on or in the photoreactor 101. Different from what is shown, the device 100 can also have a combination of LED light modules 1 at and in the photoreactor 101 in order to illuminate the medium initially placed therein from the outside and from the inside. In this case, the photoreactor 101 can be configured as a batch reactor or a flow reactor. Figure 8 The arrangement of an LED immersion lamp 1A inside a photoreactor 101 is shown, wherein the reaction medium surrounds the immersion lamp 1A. That is, the immersion lamp 1A can be immersed in the reaction medium located in the photoreactor 101, so that the radiation emitted by the immersion lamp 1A reaches the reaction medium directly. Alternatively, within the photoreactor 101, the reactor volume containing the reaction medium can be separated from the immersion lamp 1A by a transparent wall, for example to improve thermal decoupling or explosion protection, or to guide the reaction medium in a specific flow path along the immersion lamp. In order to separate the immersion lamp 1A to improve thermal decoupling or explosion protection, additional immersion tubes (not shown) can be used around the sleeve, wherein the gap between them can be evacuated or connected to a cooling circuit. In order to change the flow path of the reaction medium along the immersion lamp 1A, for example, one or more transparent tubes (not shown) can be wrapped around the immersion lamp. For protection or temperature control, the interior of the photoreactor 101 can be filled or flushed with a suitable gaseous or liquid fluid.

[0072] Fig. 9 The device 100 shown for performing a photochemical reaction provides an LED surface radiator 1B arranged on the side wall of a photoreactor 101, whereby the LED surface radiator 1B is composed of a material transparent to radiation from the LED surface radiator 1B, or has an opening, wherein the LED surface radiator 1B is arranged in a sealed manner with the window glass 10a pointing inward.

[0073] Reference numerals list

[0074] 1 LED light module

[0075] 2 LED groups

[0076] 3LED

[0077] 4 Drive device

[0078] 5 Circuit Board

[0079] 6 Support cage

[0080] 6a, 6b, 6c, 6d support structure, bearing structure, track structure, pipeline structure

[0081] 7 Supply routes

[0082] 7a Connecting device

[0083] 8. 8a Coolant inflow part, inflow opening

[0084] 9 Control and / or regulating elements

[0085] 9a, 9b, 9c, 9d Current, voltage, temperature, photon measuring devices

[0086] 9e Switching element

[0087] 10 Casing

[0088] 10a Plate

[0089] 11. Internal Space

[0090] 12, 12a, 12b shell, base, side wall

[0091] 12c, 12d inflow and outflow openings

[0092] 13, 14, 14a Inflow, outflow connection, outflow opening

[0093] 15.5a Head, channel opening

[0094] 100 Apparatus for carrying out photochemical reactions

[0095] 101 Photoreactor

[0096] 102 Switchgear

[0097] L Non-conductive liquid

[0098] K Cooling circuit

[0099] Ikonst constant current source

[0100] Ukonst constant pressure source

Claims

1. An LED lamp module (1), configured to be arranged in a device (100) for performing a photochemical reaction, wherein: The LED lamp module (1) comprises a plurality of LEDs (3) and a shaped support body (6) for fastening the LEDs (3), wherein the support body (6) is arranged together with the LEDs (3) in an inner space (11) of the LED lamp module (1), the inner space being defined by a transparent wall element (10, 10a) and a housing element (12, 15), wherein the transparent wall element (10, 10a) is arranged corresponding to the LEDs (3), and at least one power supply line (7) extends through the housing element (12, 15) to electrically connect the LEDs (3), and wherein the plurality of LEDs (3) are divided into LED groups (2) having a predetermined number of LEDs (3), wherein the LEDs (3) of each LED group (2) are connected in series, and each LED group (2) is respectively assigned a driving device (4) and connected to the driving device (4) as a constant current source (Ikonst) for operating the LEDs (3) of the corresponding LED group (2), It is characterized in that Each driving device (4) is arranged on the support body (6) in the inner space (11) of the LED lamp module (1) adjacent to the LED group (2) to which it is assigned, and Each driver (4) is connected in series with the respectively assigned LED group (2) to form an LED current branch, wherein the LED current branches are connected in parallel, and the parallel-connected LED current branches are connected to a constant voltage source (Ukonst) via the power supply line (7).

2. The LED lamp module (1) according to claim 1, It is characterized in that The predetermined number of LEDs (3) of all LED groups (2) is the same and is at most 25, preferably at most 20, particularly preferably at most 15.

3. The LED lamp module (1) according to claim 1 or 2, It is characterized in that The LED current branch of the LED group (2) with its assigned driving device (4) is constructed as an integrated switching module fastened to a circuit board (5) of the support body (6), wherein one or more LED groups (2) and their assigned driving device (4) are arranged on each circuit board (5).

4. The LED lamp module (1) according to at least one of claims 1 to 3, It is characterized in that Each LED group (2) is assigned at least one control and / or regulating element (9) and - at least one measuring device (9a, 9b, 9c, 9d) selected from the group consisting of a current measuring device (9a), a voltage measuring device (9b), a temperature measuring device (9c) and a photon measuring device (9d), and / or - is assigned at least one switching element (9e), The control and / or regulating element (9) is communicatively connected to the at least one measuring device (9a, 9b, 9c, 9d) and is configured to control the at least one measuring device (9a, 9b, 9c, 9d) according to the measured value detected from the at least one measuring device (9a, 9b, 9c, 9d). - actuating the switching element (9e) in order to switch the LED (3) of the assigned LED group (2) on or off and / or dim it according to the measured value, and / or - controlling the driver (4) of the assigned LED group (2) for adjusting the constant current source (Ikonst) in order to operate the LED (3) of the assigned LED group (2) at a predetermined power.

5. The LED lamp module (1) according to claim 4, It is characterized in that The measuring device (9a, 9b, 9c, 9d) and / or the switching element (9e) are arranged as an integrated switching module on the printed circuit board (5) of the associated LED group (2).

6. The LED lamp module (1) according to claim 4 or 5, It is characterized in that The control and / or regulating element (9) is arranged as an integrated switch module on the circuit board (5) of the assigned LED group (2) or outside the internal space (11), wherein the control and / or regulating elements (9) are communicatively connected to each other and / or to a superior control and / or regulating element (90), and are configured to match the predetermined radiation powers of the LEDs (3) of each LED group (2) to each other, and / or to assign an ID to each LED group (2), and / or to detect operating data and / or operating time of each LED group (2).

7. The LED lamp module (1) according to at least one of claims 1 to 6, It is characterized in that The LED lamp module (1) has at least one power supply track (6c) for receiving the at least one line (7) in the inner space (11).

8. The LED lamp module (1) according to at least one of claims 1 to 7, It is characterized in that The support body (6) is a support cage (6) having a grid structure, wherein the grid structure has a support structure (6a) for fastening the LED group (2) and at least one supporting structure (6b) for positioning and being arranged in the internal space (11).

9. The LED lamp module (1) according to claim 8, It is characterized in that The at least one power supply track (6c) is provided by at least one track structure (6c) of the support cage (6).

10. The LED lamp module (1) according to at least one of claims 1 to 9, It is characterized in that The LED lamp module (1) comprises a cooling circuit (K) with a non-conductive liquid (L), wherein the housing element (12, 15) has an inflow connection (13) and an outflow connection (14) for connecting the inner space (11) to the cooling circuit (K), so that the inner space (11) is completely filled with the non-conductive liquid (L).

11. The LED lamp module (1) according to at least one of claims 1 to 10, It is characterized in that The LED lamp module (1) is configured as an immersion lamp (1A) having a longitudinal axis (A), wherein the transparent wall element (10, 10a) is a transparent sleeve (10) closed on one side, which is arranged coaxially with the LED (3) around the support body (6), and wherein the housing element (12, 15) has a head (15) arranged at the open end of the sleeve (10).

12. The LED lamp module (1) according to claim 11, It is characterized in that The support body (6) configured as a support cage (6) has at least one longitudinal axial end the at least one support structure (6b) for positioning in the inner space (11), wherein the support structure (6b) is configured for central arrangement at the head (15) and / or the closed end of the sleeve (10), and / or The head (15) has a channel opening (15a), wherein the inflow connector (13) and the outflow connector (14) each extend through one of the channel openings (15a) or are connected to one of the channel openings (15a), and wherein the inflow connector (13) is preferably connected to a pipe structure (6d) on the inner space side, the pipe structure (6d) being arranged in the support body (6) configured as a support cage (6) and extending longitudinally through the support cage (6) as a coolant inflow portion (8), the coolant inflow portion (8) providing an inflow opening (8a) at an end of the inner space (11) away from the head, wherein the outflow connector (14) extending through the head (15) or the channel opening (15a) connected to the outflow connector (14) provides an outflow opening (14a) at an end of the inner space (11) close to the head.

13. The LED lamp module (1) according to at least one of claims 1 to 10, It is characterized in that The LED lamp module (1) is configured as a surface radiator (1B), wherein the transparent wall element (10, 10a) is a transparent flat window glass (10a), and the housing element (12, 15) is a housing (12) having a base (12a) and a side wall (12b), wherein the window glass (10a) closes an opening surface defined by the side wall (12b), and the LED (3) arranged on the support body (6) is arranged in a plane (B) parallel to the window glass (10a) between the window glass (10a) and the base (12a).

14. The LED lamp module (1) according to claim 13, It is characterized in that The support body (6) configured as a support cage (6) having at least one support structure (6b) is arranged on the base (12a) of the housing (12), and the support structure (6a) to which the LED (3) is fastened is formed on a side of the support cage (6) facing away from the at least one support structure (6b), wherein the size of the support cage (6) between the support structure (6a) and the at least one support structure (6b) determines the distance between the LED (3) and the window glass (10a), and / or The housing (12) has at least one inflow opening (12c) connected to the inflow connection piece (13) and at least one outflow opening (12d) connected to the outflow connection piece (12) on opposite sides of the inner space (11).

15. A device (100) for performing a photochemical reaction, comprising a photoreactor (101) arranged on or in at least one lamp module, The lamp module emits radiation having a wavelength suitable for a photochemical reaction, It is characterized in that The light module is an LED light module (1) according to at least one of claims 1 to 14.

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