EP3594568A1 - Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés - Google Patents

Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés Download PDF

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Publication number
EP3594568A1
EP3594568A1 EP19190183.4A EP19190183A EP3594568A1 EP 3594568 A1 EP3594568 A1 EP 3594568A1 EP 19190183 A EP19190183 A EP 19190183A EP 3594568 A1 EP3594568 A1 EP 3594568A1
Authority
EP
European Patent Office
Prior art keywords
fluid
piece
led
line
discharge line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19190183.4A
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German (de)
English (en)
Other versions
EP3594568B1 (fr
Inventor
Michael Peil
Florin Oswald
Harald Maiweg
Bernd Willer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Noblelight GmbH
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Heraeus Noblelight GmbH
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Publication of EP3594568A1 publication Critical patent/EP3594568A1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/56—Cooling arrangements using liquid coolants
    • F21V29/58—Cooling arrangements using liquid coolants characterised by the coolants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a device for, in particular for cooling an LED lamp or LED modules of an LED lamp, the device comprising a supply line for supplying a fluid and a plurality of heat exchangers connected to the supply line, a plurality of LEDs being arranged on each heat exchanger and are coupled to the heat exchangers with respect to heat transfer, so that the LED lamp or the LED modules can or can be tempered by the fluid, in particular can be cooled.
  • the invention also relates to a method for tempering, in particular cooling an LED lamp or at least two LED modules of an LED lamp using such a device and a method for curing a light-curing tube using such a device.
  • a compact, powerful, preferably cylindrical lamp is required.
  • LEDs are suitable radiation sources for implementing high-performance small special lamps for UV curing applications, especially in the area of trench-free sewer rehabilitation. They enable the implementation of compact, efficient light sources that can be adapted to the optical and geometric requirements of the materials to be hardened. In addition, LEDs do not require a waiting time to reach full operating performance because they can be switched quickly (in the range of milliseconds or even shorter). Furthermore, LEDs emit in narrow spectral ranges with half-widths of typically 10-40 nm, so that no infrared radiation is emitted by UV LEDs and blue LEDs. Thereby thermal dissociation of the polymers to be cross-linked can be avoided.
  • LED lamps which are used as curing devices for sewer renovations with such a high power density, often require the most efficient possible cooling, which prevents their functioning from deteriorating due to overheating of their components.
  • Typical intensities of a few mW / cm 2 up to a few 10 W / cm 2 are required for a material to be hardened by photoinitiated polymerization, which explains the aforementioned optical output powers of the LED lamps. Since the efficiency and lifespan of LEDs (ratio of optical output power and electrical operating power) is proportional to the operating temperature of the LEDs, good cooling of the LEDs is necessary.
  • the slim, tubular structure means that heat must be added to or removed from them.
  • Fluids such as air or water, are expedient as a medium for transporting the thermal energy.
  • this circuit causes a disadvantageous, sequentially increasing flow temperature of the heat exchangers / heat sinks through which the cooling medium flows later, and thus a lower efficiency and service life of these modules, in particular of the end module, which has the highest operating temperature.
  • Increasing the flow rate of the coolant is one way of reducing this effect.
  • this is also associated with an increased pressure drop, the compensation of which either requires an increase in the operating pressure, which places greater demands on the heat exchangers / heat sinks, or an increase in the line cross section, which is often not possible due to the limited space and the resulting higher weight of the system is.
  • WO 2008/101499 A1 a generic device for tempering a linear LED lamp or LED modules of an LED lamp is known. Inside, the device comprises a feed line in the form of a tube, through which air flows, in order to cool LEDs, which are arranged on the cylinder jacket of the tube, with the air stream. Openings are provided in the supply line through which the air flow can escape to the outside into a pipe to be renovated. A discharge for discharging the heated air flow is not provided.
  • liquid fluid such as water
  • liquid fluids can absorb heat much more efficiently than gaseous fluids.
  • the fluid heats up when it flows through each device module, so that the front LED modules are heated or cooled more than the rear LED modules.
  • This cooling system is therefore based on a serial connection of the heat exchangers located one behind the other (serial flow through fluid cooling media). This leads, for example, to the different lifetimes of the LEDs in the different LED modules.
  • the object of the invention is therefore to overcome these problems.
  • a uniform temperature control of the LED lamp or the LED modules of an LED lamp should be achieved.
  • Liquid fluids should also be usable for temperature control without the LEDs being damaged.
  • the device comprises a drain for draining the fluid, wherein the supply line and the discharge line are each connected to one another in a fluid-tight manner via an L-piece at one of their ends and additionally via at least one T-piece in the supply line and at least one T-piece in the discharge line, or the supply line and the discharge line via an L-piece at the end of the supply line, which is connected to a T-piece in the discharge line, and an L-piece at the end of the discharge line, which are fluid-tightly connected to one another by a T-piece in the supply line , or the supply line and the discharge via an L-piece at the end of the supply line, which is connected to a T-piece in the discharge line, and an L-piece at the end of the discharge line, which is connected to a T-piece in the supply line, and are additionally connected to one another in a fluid-tight manner via at least one T-piece in the feed line and at least one T-piece in the discharge line, so that the fluid flows spatially separated from
  • heat exchangers connected in parallel are displaceable, compressible and / or movable relative to one another.
  • the device is of modular construction and comprises LED modules, an LED module comprising two L pieces and at least one LED module comprising two T pieces or two LED modules comprise an L-piece and a T-piece and / or at least one further LED module comprises two T-pieces, and wherein the LED modules additionally comprise a fluid connection with a heat exchanger, the LED modules being connected to one another, in particular detachably, via supply line parts and discharge line parts, so that additional LED modules can be easily exchanged, removed and additionally installed.
  • the lead parts and lead parts that connect the LED modules to one another are flexible, stretchable and / or compressible, in particular flexible plastic hoses and / or bellows, preferably with springs, so that the device can be towed in a tube so that it can bend is.
  • a further development of the device provides that the LED modules are arranged in a row in a geometrically linear manner.
  • the derivation is arranged parallel to the supply line.
  • the fluid flows in the discharge in the opposite direction to the supply.
  • the device comprises the LED lamp or the LED modules.
  • the LED modules are of the same type, in particular identical.
  • the LED lamp or the LED modules is a curing device, in particular a light source for sewer renovation, the fluid not coming into contact with the material to be cured.
  • each LED module comprises at least one substrate with at least one LED, preferably at least one high-power LED, which are preferably arranged in a ring shape in such a way that the LEDs face outward, preferably in all directions of a plane perpendicular to the linear structure of the LED lamp or the LED modules.
  • a plurality of LEDs are applied to a substrate as a chip-on-board (COB).
  • COB chip-on-board
  • COB chip-on-board
  • each LED module comprises a connection unit, to which supply lines are connected, which include the feed line, the discharge line and electrical cables, which are at least partially connected to the LEDs.
  • each LED module is surrounded by a housing, in particular a glass, stainless steel or plastic housing.
  • a further alternative embodiment of the invention provides that the device comprises a supply unit which comprises a fluid controller for controlling the flow rate and / or the temperature of the fluid through the feed line and / or the discharge line.
  • the supply unit comprises an LED controller for controlling the voltage applied to the LEDs.
  • the device and / or the LED modules comprise at least one sensor, preferably a temperature sensor, an illuminance sensor, a current sensor, and / or a voltage sensor.
  • the senor or sensors is or are connected to the fluid controller and / or the LED controller in the supply unit.
  • the electrical cables of the supply line contact at least one sensor and / or a drive device and connect them to the supply unit.
  • each heat exchanger and / or each LED module has a cylindrical or annular structure with a circular or polygonal cross section.
  • At least two adjacent openings for the inflow and outflow of the fluid are provided on the inside and / or the side surfaces of the heat exchangers, which are separated from one another by a partition in the heat exchangers in such a way that the fluid essentially removes the heat exchangers flowed through the entire circumference.
  • the supply line and the discharge line extend through the opening of the cylindrical or ring-shaped LED modules and / or the cylindrical or ring-shaped heat exchangers.
  • the supply parts and discharge parts which connect the modules to one another are flexible, in particular are flexible plastic hoses, so that the device can be towed in a pipe so that it can bend.
  • the fluid is a gas, in particular compressed air or nitrogen, or a liquid, in particular water.
  • each LED module is designed for an optical power between 1 watt to 1000 watts.
  • the LED lamp at least partially, in particular the LED modules, can be cooled and / or heated by the fluid.
  • the feed line, the discharge line, the T-pieces, the L-pieces and the heat exchangers are connected to one another in a fluid-tight manner.
  • the cross section of the fluid connections is set so that orifices are arranged in or on the fluid connections in such a way that a similar volume flow of the fluid flows through all heat exchangers so that the volume flows through the heat exchangers differ by a maximum of a factor of 3, preferably a maximum of a factor of 2.
  • the object is also achieved by a method for tempering, in particular cooling an LED lamp or at least two LED modules of an LED lamp using such a device, with a fluid being fed through the feed line to the at least two heat exchangers, where there is an exchange of heat the LED lamp or the LED modules takes place and the fluid is then discharged through the drain.
  • the fluid flows from the discharge line into a supply unit, is cooled or heated there and is then fed back into the supply line in order to regulate the temperature of the fluid in the supply line, in particular depending on the signals of at least one sensor , and / or the flow rate of the fluid is regulated, in particular as a function of the signals of at least one sensor.
  • the object for a method for curing a light-curing tube is achieved in that such a device for cooling a curing device, in particular a light source for sewer renovation, is introduced into the tube together with the curing device and then the tube is cured by the light from the LEDs , while the device and the curing device are moved through the tube and the curing device or the LED modules of the curing device are cooled by the device, in particular using a method as already described.
  • the flow rate of the fluid, the temperature of the fluid, the radiation power of the LEDs and / or the speed of movement of the device in the tube is controlled, in particular depending on the measured values of a sensor, in particular a temperature sensor, an illuminance sensor, one Current sensor and / or a voltage sensor.
  • the invention is therefore based on the surprising finding that even with heat exchangers arranged geometrically in series, these can be connected in parallel with respect to the temperature-regulating fluid, and an equally strong temperature control can thus be achieved at the various heat exchangers. All device modules that are connected to the heat exchangers are cooled or heated to the same extent by this device.
  • the present invention solves the problems that arise by geometrically arranging the cylindrical heat sinks / heat exchangers in series, but connecting them in parallel in the cooling circuit, with each individual heat sink in Circulation direction of the circumference is flowed through.
  • This is achieved in that the supply line and the discharge line of the heat sink / heat exchanger are arranged in the interior of the cylinder and these are each connected by a T-piece or an L-piece to a supply line or discharge line common to all heat sink / heat exchangers.
  • These T-pieces and L-pieces can either be realized as individual components, the branches of which are connected to the supply line or the discharge line of the heat sink / heat exchanger.
  • their temperature distribution functionality can be integrated directly into the heat sink / heat exchanger, so that the heat sink / heat exchanger has two flow and two return connections on each end face.
  • the parallel connection (coupling) of the heat exchangers enables the flow temperature of the individual heat exchangers to be the same, even though these are geometrically arranged in series (for example, one after the other in a pipe).
  • a coordinated system line resistances, flow resistances of the heat exchangers and connecting pieces are adjusted
  • the same volume flow can be set through all heat exchangers and thus the same temperature conditions can be achieved for all LED modules (for example, the same cooling conditions for all LED modules).
  • the heat exchanger of the LED lamp furthest away from a recooler has the same temperature as the closest one, differently than in a series connection of the heat exchangers.
  • the same operating and output variables can be implemented for all coupled LED modules that are temperature-dependent: efficiency, service life, emission wavelength and electrical power consumption.
  • a parallel connection causes a lower pressure drop in the overall system than a series connection, which is particularly relevant when the flow resistances in the lines become small compared to those of the heat exchangers.
  • a further advantage is achieved in that the length of the individual LED modules can be reduced, which favors the ability of the device to bend.
  • an LED lamp was found as the light source for the sewer renovation in the house connection area, which homogeneous irradiation of the inner wall of a pipe with a small, round cross section of about 15 cm and high irradiance of several 100 mW / cm 2 up to a few W / cm 2 enables.
  • the LED lamp is bendable and can be towed in 45 ° and 90 ° bends.
  • the necessary power density with homogeneous illumination of the inner tube wall is achieved with more than three hundred LEDs on a heat sink that acts as a heat exchanger with a diameter of approximately half the tube diameter (approximately 8 cm) and a length of approximately a quarter of the diameter (about 3.5 cm).
  • the modules In order to achieve the required radiation dose for towing speeds of a few centimeters to a few ten centimeters per minute (over 30 cm / min), the modules should be coupled with one another as flexibly as possible.
  • the associated high optical powers in the range from a few watts to several 100 W require equally compact due to the necessary compactness of the LED lamps and the typical efficiency of LEDs (typically in the range from 1% to 50%, normally 10% to 30%) like efficient heat sinks.
  • the substrates are arranged on an elongated, preferably cylindrical body with a polygonal cross section, preferably triangular, square, pentagonal, hexagonal or octagonal cross section.
  • the LED modules can be flexibly coupled in series.
  • each heat exchanger is connected by a T-branch or an L-branch to a supply or discharge line common to all heat exchangers, which are routed centrally through the heat exchangers.
  • each heat exchanger can be operated in a coordinated system at the same flow temperature with a comparable cooling capacity or heating capacity and the same efficiency and lifespan can be maintained using the LED modules located one behind the other.
  • the individual heat exchangers are preferably flowed through in the direction of circulation.
  • the fluid which can be a gas, such as compressed air or nitrogen, for low power requirements, but is otherwise a liquid, and is a medium with high heat capacity, such as water, at higher powers, flows close to the outer surface along the Circulation of the heat exchanger along, so that the substrates are effectively cooled with the LEDs.
  • the flow resistance of the fluid / cooling medium in the system is also kept low, so that a smaller diameter of the supply lines can be used than in a serially constructed temperature control system with the same volume flow of the fluid.
  • a serial cooling system can have a similar total cooling capacity, but then has a higher temperature difference between the heat exchangers. This is particularly the case if the flow resistances of the heat exchangers are comparable or greater than those of the lines which connect the heat exchangers to one another. In the opposite case, it may be necessary to adjust the flow resistances on the individual heat exchangers to regulate a uniform volume flow, which can be achieved, for example, by using orifices.
  • connection functionality in the center of the heat exchanger also enables a short length of the heat exchanger, which favors the system's bendability.
  • a device according to the invention therefore has a number of advantages.
  • a parallel circuit for the supply of coolant or heating medium to successive heat exchangers enables the operation of all heat exchangers in an adapted system under the same conditions, in particular with the same flow temperature and with the same volume flow of the fluid through the individual heat exchangers.
  • measures for adapting the volume flow rates may be necessary, such as Example the said regulating panels.
  • this case represents a borderline case that can usually be avoided.
  • the more complex parallel supply avoids a sequential increase or decrease in the flow temperature in the direction of the heat exchanger that is the most distant from the flow of the system. This property is particularly relevant when cooling LEDs, which show strongly temperature-dependent properties and whose efficiency, emission wavelength, service life and operating voltage can be negatively influenced.
  • the flow resistance of the parallel system is lower than that of the serial system.
  • connecting lines with a smaller nominal width for realizing the same volume flow or with the same nominal sizes of the connecting lines can achieve higher volume flows and thus better cooling or heating capacities at the same operating pressure either at the same operating pressure.
  • the heat exchangers can be constructed in such a way that the fluid flows circularly and almost over the entire surface, close to the outer surface, so that efficient temperature control is achieved.
  • the line in the heat exchanger can be macroscopic or microscopic (for example microchannel cooling).
  • the possibility of increasing the efficiency of the cooling output can be used to increase the efficiency of the LED lamp and / or to increase the optical limit output of the system, since there is a temperature dependency of the LED parameters.
  • the direction of flow of the fluid can be set in opposite directions from module to module.
  • Possible gradients which occur when the coolant is heated or when the heating medium cools between the supply and return lines and can, for example, result in a gradient of the optical power of LEDs along the circumference of a cylindrical LED module, can be distributed alternately, so that possible influences of such gradients in towing processes are dampened or even avoided.
  • the arrangement of the connecting elements in the interior of the cylindrical heat exchanger enables a short length of the LED module and thus better bendability than when the connecting elements are positioned on the end face of the heat exchanger.
  • connection mechanism of the connections can be of different types: T or L pieces connected by hoses and hose clamps, screwable couplings with integrated T and L function or pluggable coupling elements.
  • plug-in coupling elements enables the construction of a modular LED system, in which each module is interchangeable, in which the supply media (electricity and coolant) can be connected and disconnected by a locking or non-locking (possibly drip-free separable) coupling mechanism.
  • the connection can be disconnectable and connectable on both sides of the module so that it is completely interchangeable without having to disassemble the entire system successively (starting from one side).
  • LED modules can be coupled to one another by rigid or by elastic, stretchable, compressible and / or compressible connections.
  • a possible smaller line diameter of the supply lines for the temperature control can have a positive effect on the weight of the system as well as on the flexibility of the system (bendability).
  • cooling circuits cooling capacity, heat sinks and coolants
  • these can also be heating circuits, heating capacity, heating elements and heating means.
  • channels to be hardened can also be thermally hardened, for example, by contact heat or thermal radiation.
  • Components such as lasers can also be heated to a certain temperature in order to achieve stable performance and an exact wavelength for the tempered lasers.
  • FIG. 1 shows a schematic view of a device according to the invention for tempering an LED lamp or LED modules of an LED lamp and outlines a cooling or heating circuit.
  • the device comprises a feed line (1) and a discharge line (2), both of which are divided into different sub-areas.
  • the feed line (1) and the discharge line (1) are formed by pipes.
  • Three T-pieces (3) are arranged between the sections of the feed line (1) and the discharge line (2).
  • the T-pieces (3) and the L-pieces (4) are also formed by pipes.
  • Heat exchangers (5) are arranged between each two adjacent T-pieces (3) of the supply line (1) and the discharge line (2) and the two L-pieces (4).
  • All pipe sections (1, 2, 3, 4, 5), i.e. the inlet parts (1), the outlet parts (2), the T-pieces (3), the L-pieces (4) and the heat exchangers (5), can be connected to one another in a fluid-tight manner using various methods.
  • the tubes can either be firmly connected to one another, for example welded, connected to one another via press fittings, or the tubes can be detachably connected to one another, for example plugged into one another or fastened to one another via coupling pieces or hose clamps or also flanged to one another.
  • Metals, ceramics or plastics can be used as the material from which the pipe sections (1, 2, 3, 4, 5) are manufactured.
  • the supply parts (1) and the discharge parts (2) are made of flexible hoses or bellows, while the T-pieces (3) and the L-pieces (4) are made of a rigid material such as solid plastic Ceramic or metal or a combination thereof are made and the heat exchanger made of metal, preferably copper, and / or a ceramic with a high thermal conductivity.
  • One of the modules of the device comprises the two L-pieces (4) and a heat exchanger (5), all other modules of the device each comprise two T-pieces (3) and a heat exchanger (5). If the modules are detachably connected to the lead parts (1) and the lead parts (2), an additional module can simply be inserted together with a further lead part (1) and a lead part (2).
  • the LED lamp to be temperature-controlled or the LED modules of the LED lamp to be temperature-controlled can be connected to each heat exchanger (5), so that heat-conducting connections between the heat exchangers (5) and the LED lamp or the LED modules are formed ,
  • the outer dimensions of the heat exchangers (5) are adapted to the geometry of the LED lamp or the LED modules.
  • the size of the device in particular the size of the heat exchanger (5), the distance between the T-pieces (3) and L-pieces (4) and the diameter of the supply line parts (1) and discharge line parts (2) are based on the size of the LED Lamp or the LED modules and adapted to their purpose.
  • a fluid for tempering the heat exchangers (5) and thereby the LED lamp or the LED modules is passed through the tubes (1, 2, 3, 4, 5), which are connected to one another in a fluid-tight manner.
  • the empty arrows indicate the direction of flow of the fluid in the pipes (1, 2, 3, 4, 5).
  • the fluid is a gas, such as compressed air or nitrogen, or a liquid, such as water, which transports thermal energy away from the heat exchangers (5) or towards the heat exchangers (5).
  • the discharge line (2) can also lead away from the inlet in the opposite direction. Then the discharge line (2) would be mounted upside down, i.e. the L-piece of the discharge line (2) would be mounted on the first T-piece (in the direction of flow of the fluid) of the feed line (1) and the L-piece of the feed line (1 ) to the T-piece of the derivative (2), which is in the in Figure 1 shown Embodiment is connected to the first T-piece of the feed line (1). The direction of flow of the fluid would then no longer be reversed from the feed line (1) to the discharge line (2).
  • FIG 2 shows an annular heat exchanger (15) with a cross section of a hexagonal polygon (hexagon).
  • the heat exchanger (15) comprises two connecting pieces (16) through which the fluid can be passed through the heat exchangers (15), as indicated by the arrows which have not been filled in.
  • the connecting piece (16) of the flow is on the left, that of the return on the right.
  • a partition in the form of a wedge (17) separates the flow from the return of the heat exchanger (15).
  • the fluid flows around the axis of the heat exchanger (15) in a circular clockwise direction, as indicated by the arrows not filled in. The flow is close to the outer surface (18) of the heat exchanger (15), whereby good heat transfer is achieved.
  • the inner ring of the heat exchanger offers enough space for connecting T-pieces or L-pieces and for the passage of cables and hoses (such as a supply line and a discharge line).
  • FIG 3 shows the schematic structure of such a connected arrangement of four heat exchangers (15) in a perspective view, together with the supply line (21) and the discharge line (22), as well as the T-pieces (23) and the two L-pieces (24) form a device according to the invention.
  • the T-pieces (23) are arranged in the feed line (21) and the discharge line (22), while the two L-pieces (24) are each arranged on one of the ends of the feed line (21) and the discharge line (22).
  • the feed line (21) and the discharge line (22) are connected to one another in a fluid-tight manner via the heat exchangers (15).
  • Both connecting pieces (16) are connected with T-pieces or L-pieces to the common supply line (21) (flow) or discharge line (22) (return flow) of a temperature control system that can supply several heat exchangers (15) in parallel, one after the other can be arranged.
  • the Figure 3 illustrates, for example, the structure of a cooling system for a high-performance LED lamp, which is based on a parallel circuit for the supply of coolant and whose heat exchanger (15) or LED modules, which act as a heat sink, are located one behind the other. Except for the last heat sink (15) (top right at the edge of the picture), the supply lines (21) or leads (22) of the heat sink (15) are connected to a common supply line (21) or lead supply line by T-pieces (23) (22) connected. The last heat sink (15) is connected to it by L-pieces (24). Such connectors (23, 24) can be individual connecting elements which are connected to the heat sinks (15), for example by hoses and hose clamps.
  • the common main lines (21, 22) can be rigid or flexible, such as polyamide hoses.
  • a cylindrical LED lamp is thereby realized, with which, with a suitable selection of the LEDs, a channel can be hardened or renovated.
  • the power supplies for the LEDs can also be routed through the ring opening of the heat exchanger (15).
  • the LED lamp is then, for example, a light source for sewer renovation in the household area.
  • FIG 4 shows an LED module (30) of such an LED lamp in a schematic cross-sectional view.
  • a large number of LEDs (32) with chip-on-board technology (COB technology) are applied to an octagonal heat sink (31), which functions here as a heat exchanger.
  • COB technology chip-on-board technology
  • a plurality of LEDs (32) are applied to a substrate (33), a substrate (33) being arranged on each of the eight sides of the heat sink (31).
  • the LED module (30) is surrounded by a circular housing (34) in the form of a protective glass, which is firmly connected to the LEDs (32) or the heat sink (31).
  • the geometry of the LED module (30) is designed for uniform illumination of a cylindrical hollow body, so that the inner wall of the LED module (30) is emitted homogeneously even with a slightly larger diameter than that of the LED module (30).
  • a light source is required, for example, in sewer renovation.
  • Liquid cooling media are suitable for applications with high demands on the optical output power, in which, due to the typical efficiencies of the LEDs (32) in the range from 1% to 50%, significant amounts of heat have to be dissipated by the heat sink (31) necessary as fluids that flow through the heat sink (31). In the present case, this is done circularly around the axis of the heat sink (31).
  • the flow flows close to the surface of the heat sink (31), so that the substrates (33) mounted thereon are effectively cooled.
  • the cross section shown thus shows the cross section of an LED module (30) of an LED lamp comprising a plurality of LED modules (30) together with a heat exchanger module (31) of the cooling device, ie an LED module (30) and a heat exchanger (31) in the sense of the present invention.
  • the LED lamp can also have electrical connections (not shown), which are necessary for operating the LEDs (32), and a controller (not shown), which supplies the LEDs (32) with current and, if necessary, provides for the propulsion of the system, include.
  • the device according to the invention can be only the cooling system and also the cooling system together with the LED lamp.
  • FIG. 5 shows schematically and exemplarily a modular LED structure.
  • the LED lamp (40) shown consists of four cylindrical LED modules (41), the geometry of which is adapted to the intended use, with connection units (42), on which supply lines (43) are connected to the LED modules (41).
  • An LED module (41) comprises at least one substrate with one or more LEDs, which is applied to a heat sink. Gases or liquids are used as the cooling medium for cooling the LEDs.
  • the heat sink can be manufactured in different ways (for example milling, punching, cutting, folding, eutectic bonding of metals, etc.).
  • the LED modules (41) are placed in a housing (glass cylinder, stainless steel or plastic housing, etc.).
  • sensors such as temperature, illuminance, current or voltage sensors, can be integrated in the LED modules (41), which report the operating status to a control and supply unit (44), which adapt the Operating conditions of the LED lamp (40) to the current state allows.
  • the connection units (42) enable a modular expansion with additional LED modules (41), as well as interchangeability for maintenance purposes. From the point of view of the cooling circuit, the parallel supply of the LED modules (41) with the cooling medium is advantageous, in particular also in terms of expandability, since all heat sinks are always supplied with the same flow temperature.
  • the LED modules (41) can be coupled via rigid or flexible connecting elements, so that they are strung together either rigidly or flexibly (via a protective tube, metal springs, bellows or the like).
  • a flexible or rigid Supply line (43) connects the LED modules (41) to the control and supply unit (44), which contains the electrical supply and the supply with the cooling medium, and comprises a control and control unit for the targeted control of relevant operating parameters.
  • the devices according to the invention are particularly suitable for use in sewer renovation for the house connection area (DN50-DN300, typically DN120-DN160).
  • the use of the technology in this area is also conceivable for larger pipe diameters, since the system allows high outputs and the geometric size can be scaled up. Downpipes from gutters, chimneys or the like can also be used.
  • An LED lamp could also be developed to renovate side connections that are sealed by light curing so-called (liner) cones. Further applications, such as in the lighting of tubular rooms or hollow bodies, are conceivable.
  • thermoelectric heating elements heat up the wall of cylindrical bodies. This can be done either by radiation (heat radiation) or by direct heat conduction between the radiator and the cylindrical body in contact.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Led Device Packages (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP19190183.4A 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés Active EP3594568B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010027533.6A DE102010027533B4 (de) 2010-07-16 2010-07-16 LED-Lampe mit Vorrichtung zum Kühlen von LEDs
EP11741100.9A EP2593716B1 (fr) 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés
PCT/EP2011/003317 WO2012007115A1 (fr) 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP11741100.9A Division-Into EP2593716B1 (fr) 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés
EP11741100.9A Division EP2593716B1 (fr) 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés

Publications (2)

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EP3594568A1 true EP3594568A1 (fr) 2020-01-15
EP3594568B1 EP3594568B1 (fr) 2021-09-01

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EP19190183.4A Active EP3594568B1 (fr) 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés
EP11741100.9A Active EP2593716B1 (fr) 2010-07-16 2011-07-05 Dispositif de refroidissement pour modules de del cylindriques pouvant être accouplés

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US (1) US9360200B2 (fr)
EP (2) EP3594568B1 (fr)
JP (1) JP5538626B2 (fr)
CN (1) CN103221742B (fr)
CA (1) CA2805029C (fr)
DE (1) DE102010027533B4 (fr)
WO (1) WO2012007115A1 (fr)

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EP3324099A1 (fr) 2016-11-16 2018-05-23 Heliospectra AB (publ) Arrangement modulaire lumineux refroidi
CN106764610A (zh) * 2016-12-23 2017-05-31 台龙电子（昆山）有限公司 一种基于led灯条的发光装置
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Also Published As

Publication number Publication date
WO2012007115A1 (fr) 2012-01-19
CA2805029C (fr) 2015-10-20
EP2593716B1 (fr) 2019-09-18
US9360200B2 (en) 2016-06-07
JP5538626B2 (ja) 2014-07-02
DE102010027533B4 (de) 2018-08-16
US20130114263A1 (en) 2013-05-09
CN103221742A (zh) 2013-07-24
EP3594568B1 (fr) 2021-09-01
DE102010027533A1 (de) 2012-01-19
JP2013529836A (ja) 2013-07-22
EP2593716A1 (fr) 2013-05-22
CN103221742B (zh) 2016-10-19
CA2805029A1 (fr) 2012-01-19

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