EP3686919A1 - Blitzlampe mit gepulstem licht und optisches modul mit gepulstem licht, das diese lampe umfasst - Google Patents

Blitzlampe mit gepulstem licht und optisches modul mit gepulstem licht, das diese lampe umfasst Download PDF

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Publication number
EP3686919A1
EP3686919A1 EP20152319.8A EP20152319A EP3686919A1 EP 3686919 A1 EP3686919 A1 EP 3686919A1 EP 20152319 A EP20152319 A EP 20152319A EP 3686919 A1 EP3686919 A1 EP 3686919A1
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EP
European Patent Office
Prior art keywords
flash lamp
reflector
optical module
pulsed light
heat exchanger
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Application number
EP20152319.8A
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English (en)
French (fr)
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EP3686919C0 (de
EP3686919B1 (de
Inventor
Janyce FRANC
Christophe PUISNEL
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Sterixene
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Sterixene
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Publication of EP3686919C0 publication Critical patent/EP3686919C0/de
Publication of EP3686919B1 publication Critical patent/EP3686919B1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only

Definitions

  • the present invention relates to the field of irradiation by high frequency pulsed light.
  • pulsed light can be used for decontamination in the fields of the food industry, pharmaceuticals, cosmetics, medical, aeronautics etc.
  • pulsed light decontamination technology consists of irradiating products, liquids, environments or objects to be decontaminated by emission of pulsed light enriched with UV radiation.
  • the document US 4,464,336 describes the general principles of high frequency pulsed light irradiation technology.
  • This technology uses a lamp comprising a rare gas, preferably xenon, to which a high voltage is applied during a short time window which is expressed in microseconds or milliseconds.
  • the high voltage which is applied to the terminals of the lamp causes the ionization of the gas contained in the lamp, the result of this ionization is the emission of a flash of high luminous intensity.
  • the light flash corresponds to a radiation or an electromagnetic pulse of white light that has an electromagnetic spectrum ranging from 180 nm to 1100 nm.
  • an irradiation system for a decontamination application.
  • the irradiation system includes a decontamination chamber which is exposed to electromagnetic radiation from a pulsed light flash lamp.
  • the flash lamp is mounted in an optical module which communicates optically with the decontamination chamber through a window transparent to electromagnetic radiation between 150 nm and 1200 nm.
  • the optical module also includes a reflector to focus electromagnetic radiation from the flash lamp to a target area.
  • the optical module also has UV and debris sensors whose function is to ensure that the irradiation system is in good working order.
  • the UV and debris sensors are powered by a low voltage electrical circuit built into the optical module.
  • a flash lamp which comprises a sealed plasma tube containing xenon.
  • the plasma tube extends between two ends, at each end of the plasma tube is arranged an electrode.
  • Each electrode is at least partially in contact with the xenon contained in the plasma tube.
  • the electrodes are configured to transmit a high voltage electric current through the gas contained in the tube plasma. Ionization of the gas contained in the plasma tube makes the lamp conductive.
  • the high voltage current supplied to the flash lamp can then pass through the lamp and generate a bright flash of high intensity white light.
  • the electrodes of the lamp are connected to a high voltage box which is configured to supply a high voltage electric current at a determined frequency.
  • the plasma has a temperature of about 500 to 1000 ° C depending on the voltage applied to the electrodes.
  • the ambient air of 20 ° C is sufficient to cool the lamp.
  • the increase in the flash frequency leads to a rapid increase in temperature which can cause problems with solarization of the wall of the lamp and therefore premature aging of the lamp. A breakage of the lamp is also possible.
  • the outer wall In order to maintain the outer wall of the lamp at around 100 ° C, the outer wall is placed in contact with a cooling fluid when the flash frequency is greater than 1 Hz.
  • the document WO 2008/012519 describes an optical module which is equipped with a hydraulic cooling circuit for the flash lamp.
  • the function of the cooling circuit is to cool the flash lamp and more generally the elements of the optical unit. This in order to increase the frequency of emission of the flash lamp and thus to guarantee an optimal treatment.
  • the document WO 2008/012519 discloses an optical module which includes an open hydraulic cooling circuit. That is to say, that the water is projected directly into contact with the flash lamp which is located in a compartment connected to the hydraulic circuit.
  • an open hydraulic cooling circuit can generate sealing problems and risks of electric arcing.
  • This design of the optical module makes maintenance operations even more delicate. Indeed, when removing the optical module of water may still be in contact with the flash lamp. This is a major problem given its power supply which is likely to be high voltage.
  • a pulsed light irradiation system can be equipped with a cooling system differentiated from the flash lamp.
  • differentiated cooling system is understood to mean a cooling tube independent of the flash lamp.
  • a differentiated cooling system has the drawback of requiring perfect centering of the flash lamp within the cooling system. Incorrect centering of the flash lamp may cause water leakage or even breakage of the flash lamp.
  • the use of a differentiated cooling system requires delicate and precise maintenance which can take more than an hour. These maintenance operations are all the more complicated and dangerous for untrained personnel.
  • a significant maintenance time is linked to a production stoppage and therefore a slowdown in production.
  • this type of system can be installed on food production chains, where the use of glass is generally prohibited for parts of the production chain. This is to prevent broken glass from falling into the food.
  • WO 2016/012488 proposes a solution to improve the design of an optical module and in particular of the cooling system of the flash lamp and the reflector.
  • this document describes a double-envelope flash lamp in which is integrated a heat exchanger which completely surrounds the plasma tube of the lamp. This heat exchanger extends longitudinally between each end of the flash lamp.
  • an inlet port and an outlet port for coolant are formed, coaxially with the axis of the lamp, an inlet port and an outlet port for coolant.
  • Such a configuration does not make it possible to create a turbulent flow around the plasma tube.
  • the document WO 2016/012488 describes an optical module which comprises a frame of U-shaped cross section. On the inner walls which form a tunnel are arranged polished aluminum foils to constitute a reflector.
  • the frame comprises a receptacle arranged along a longitudinal axis at the top of the tunnel.
  • the flash lamp is positioned in a receptacle and is subjected to mechanical stresses due to its maintenance in position in the receptacle. This problem can cause flash lamp breakage when installing them or changing the flash lamp in the receptacle.
  • the walls of the aluminum reflector absorb 20% of the thermal release of the radiation from the flash lamp. In fact, the walls of the reflector quickly rise in temperature. At the same time, to ensure proper operation of the flash lamp, it is necessary to maintain the walls of the reflector at a temperature below 100 ° C.
  • the document WO 2016/012488 describes an outer wall of the frame comprising grooves in which run tubes of a heat exchanger cooling the walls of the frame and in particular the walls of the reflector.
  • the transfer of heat energy from the reflector to the coolant circulating in the heat exchanger must take place through the aluminum foil, the wall of the frame and the wall of the tube which constitutes the heat exchanger.
  • the heat exchanger of the flash lamp and the heat exchanger of the reflector are independent and operate in parallel. This mechanical configuration complicates the mechanical structure of the optical module and increases its manufacturing cost.
  • the present invention provides a technical solution which aims to simplify and secure its design so, on the one hand, to optimize the operation of a high-frequency irradiation system, and on the other hand, to facilitate optical module maintenance operations.
  • a first aspect of the invention relates to a pulsed light flash lamp comprising a sealed plasma tube which contains a pressurized gas, the plasma tube extending along a longitudinal axis between a first end and a first end. second end, at each end of the plasma tube is disposed a plug equipped with an electrode which is at least partially in contact with the gas contained in the plasma tube so as to transmit a high voltage electric current from one end to the end.
  • the plasma tube is fully integrated in a heat exchanger with calorific fluid, the heat exchanger being formed by a casing extending between two ends and comprising an inlet orifice and a calorific fluid outlet port, the inlet port and the outlet port are respectively arranged at one end of the casing.
  • the flash lamp is characterized in that the inlet orifice and the outlet orifice protrude from the casing, released laterally with respect to the longitudinal axis of the plasma tube and extend at an angle greater than 45 ° relative to the longitudinal axis of the plasma tube, the electrodes emerging outwards through the heat exchanger, through a sheath which extends, along the longitudinal axis of the plasma tube, each cap completely insulating the electrodes of the heat exchanger.
  • the configuration of the calorific fluid inlet and outlet orifices makes it possible to generate a flow of turbulent calorific fluid by constraining the fluid inlet and outlet. Turbulent flow of heat fluid improves cooling of the flash lamp during its operation. It is thus possible to increase the frequency of the irradiations and / or to maintain a frequency during a longer operating period and to optimize the life of the flash lamp. Furthermore, the lateral clearance of the calorific fluid inlet and outlet orifices also contributes to facilitate the insulation of the electrical parts of the flash lamp and to reduce the risk of an electric arc.
  • the inlet port and the outlet port are extended by a conduit which extends from the heat exchanger in a direction opposite to the plasma tube.
  • Each duct makes it possible to control the flow of calorific fluid and to avoid any overflow by reflux.
  • the inlet orifice and the outlet orifice extend at an angle of 90 ° with respect to the longitudinal axis of the plasma tube. This feature optimizes the cooling of the plasma tube by generating a turbulent fluid flow during use.
  • the inlet and outlet ports respectively constitute a quick mechanical connector to be plugged in and unplugged, comparable to a so-called “plug and play” connection. This facilitates maintenance: installation or replacement of the flash lamp.
  • the inlet and outlet ports are configured to connect with a cooling system circulating calorific fluid.
  • the inlet orifice and the outlet orifice are respectively equipped with a spring seal, the two spring seals respectively encircling an orifice.
  • Each spring seal advantageously fulfills two functions.
  • the first function of the spring seal is to maintain the tightness of the flash lamp heat exchanger at the connection with a cooling system.
  • the second function of the spring seal is to provide an elastic mechanical connection with a cooling system.
  • this elastic mechanical connection reduces the mechanical stresses which apply to the flash lamp. The result of this effect is a reduction in flash lamp breakage whether during installation, operation or replacement.
  • each plug is extended by a sheath which extends outwardly through the heat exchanger so as to be connected to a high voltage box.
  • the sheath is used to isolate the high voltage power supply to the flash lamp.
  • each sheath has at least one rigid portion ensuring the maintenance of the plasma tube in position within the heat exchanger. It is thus possible to maintain the plasma tube in a determined position during its operation. This characteristic makes it possible to reproduce constant electromagnetic radiation in the direction of a target area.
  • the calorific fluid being formed by a gas and / or water, and preferably deionized water.
  • a second aspect of the invention relates to a pulsed light optical module incorporating a flash lamp according to the first aspect of the invention.
  • the flash lamp is supplied with high voltage current via two electrical connectors.
  • the optical module is characterized in that, the reflector and the groove are formed in the mass, the cooling system of the optical module extending at least partially in the mass of the reflector, said cooling system is also configured to so as to removably connect with the heat exchanger of the flash lamp while the two electrical connectors are isolated from the reflector unit and from the support unit by lateral release at the level of the flash lamp receptacle.
  • the integration of the cooling system in the mass of the reflector makes it possible to improve the cooling of the latter. In particular, it is possible to maintain the reflector at a temperature below 100 ° C. during operation. In particular, the reflector can be maintained at a temperature below 45 ° C. This helps to optimize the operating frequency of the flash lamp but also to facilitate maintenance of the optical module by maintaining acceptable temperatures. so that an operator intervenes without delay on a malfunction or a flash lamp breakage.
  • the removable connection of the cooling system of the optical module with the heat exchanger of the flash lamp, and the insulation of the electrical connectors of the flash lamp facilitate maintenance operations and reduce the risk of the generation of heat exchanger. electric arc at the optical module and a high voltage power supply box which is an expensive part of the system.
  • the reflector unit is equipped with gripping means and is removably connected to the support unit by mechanical means that can be removed manually.
  • the gripping means participate in facilitating the assembly and disassembly operations of the reflector unit. Only the reflector unit can be dismantled, which makes it possible to reduce the load to be handled, approximately one kilogram, while the entire module has a mass which can amount to five kilograms.
  • no tools are required to perform maintenance. This makes it possible to facilitate the maintenance which can then be carried out in an area provided for this purpose in a few minutes instead of an hour for a conventional irradiation system.
  • the reflector unit also comprises a first lateral element and a second lateral element, the two lateral elements are arranged on either side of the reflector, each lateral element is equipped with means of connection configured to form a hydraulic connection with the inlet port and / or the outlet port of the heat exchanger casing.
  • the support unit carries electronic sensors which are arranged at the level of the receptacle of the flash lamp in order to be isolated from the cooling system, their low voltage supply being released laterally with respect to the Cooling system. This characteristic helps to reduce the risk of an electric arc phenomenon between the cooling system and the power supply to the electronic sensors.
  • the cooling system has a first hydraulic connection supplying calorific liquid to at least one cooling circuit which is at least partially integrated into the reflector, the cooling system being connected to a cooling system. supply of calorific fluid through its first hydraulic connection and a second hydraulic connection.
  • the first hydraulic connection and the second hydraulic connection are arranged opposite the low voltage supply of the electronic sensors, on the other side of the reflector unit. This is to reduce the risk of an electric arc phenomenon.
  • the optical module comprises circulation means consisting of a pump and a reservoir, the pump drawing from a reservoir of calorific liquid, the circulation means are remote from the optical module.
  • deionized water is used as the heating liquid and a deionizer filter is arranged between the tank and the pump.
  • one aspect of the invention relates to a pulsed light flash lamp 1 configured to provide, at high frequency, electromagnetic radiation of white light which exhibits an electromagnetic spectrum ranging from 180 nm to 1100 nm.
  • the flash lamp 1 comprises a plasma tube 3 which is sealed and contains a pressurized gas.
  • the gas contained in the plasma tube 3 is maintained at a pressure between 300 Torr and 900 Torr and preferably the pressure is between 450 Torr and 750 Torr.
  • the rare gas xenon is used by virtue of its ability to produce electromagnetic radiation of white light enriched with UV radiation.
  • the rare gas krypton it is also possible to use the rare gas krypton.
  • a xenon / krypton mixture could also be used in various proportions.
  • the plasma tube 3 extends in a longitudinal direction between a first end 30 and a second end 31.
  • the plasma tube 3 is similar to a rectilinear cylinder.
  • the plasma tube 3 could take a multitude of regular or non-regular geometric shapes.
  • the plasma tube 3 may have a length of between 100 mm and 500 mm for an internal diameter of between 0.1 mm and 1 mm. The internal diameter corresponds to the diameter of the enclosure containing the gas which is delimited by the walls of the plasma tube 3.
  • each stopper 32 hermetically ensures the maintenance under determined pressure of the gas contained in the plasma tube 3.
  • each stopper 32 is equipped with an electrode 33. which is at least partially in contact with the gas contained in the plasma tube 3. In contact with the gas, the electrodes 33 make it possible to transmit a high voltage electric current between each end 30, 31 of the flash lamp 1. In the direction of l 'invention, a high voltage electric current means that this current has a voltage between 1500 volts and 5000 volts.
  • High intensity electromagnetic radiation means, according to the invention, electromagnetic radiation which generates a high electric power of between 0.8 MW and 3 MW.
  • each plug 32 is extended by a sheath 34 which extends towards the outside of the flash lamp 1 so as to be connected to a high voltage box capable of supplying the flash lamp 1.
  • the sheath 34 is extended outside the flash lamp 1 by an electrical connector 35.
  • each electrical connector 35 is connected to an electrode 33 in order to transmit the high voltage current through the plasma tube 3 of the flash lamp 1.
  • the electrical connectors 35 define the terminals of the flash lamp 1.
  • the flash lamp 1 comprises a heat exchanger 5 with calorific fluid integrated into its structure.
  • the plasma tube 3 is integral with the heat exchanger 5 with calorific fluid. More specifically, the plasma tube 3 is at less partially integrated in the heat exchanger 5.
  • the gas contained in the plasma tube 3 can be cooled continuously when using flash lamp 1.
  • the plasma tube 3 is fully integrated in the heat exchanger 5.
  • the heat exchanger 5 extends in a longitudinal direction around the plasma tube 3 of the flash lamp 1.
  • the calorific fluid can be formed by gas and / or water. Air will be preferred as the calorific fluid when choosing a gas-type calorific fluid. While we prefer to use deionized water. Indeed, deionized water has the advantage of reducing the risk of an electric arc appearing between the high voltage circuit and the calorific liquid circulating in the heat exchanger 5. This characteristic contributes to increasing the safety of the lamp. flash 1 during operation and maintenance.
  • each sheath 34 protects an electrode 33 by extending, through the heat exchanger 5, towards the exterior of the flash lamp 1.
  • each sheath 34 hermetically connects an electrode 33 to an electrical connector 35 via an electrical cable (not visible). Insulating the high voltage power supply of the flash lamp 1 from the heat exchanger also reduces the risk of an electric arc.
  • each sheath 34 has at least one rigid portion in order to maintain in position the plasma tube 3 in position within the heat exchanger 5.
  • the plasma tube 3 is maintained in position along a longitudinal central axis. of the heat exchanger 5.
  • the rigid portion of the sheath 34 extends at least from the plug 32 to the outside of the heat exchanger 5.
  • the rigid portion of the sheath 34 corresponds to the portion of the sheath 34 which is internal to the flash lamp 1.
  • sealing means are arranged at the junction between the wall of the heat exchanger 5 and the sheath 34. As an indication, the sealing means can be formed by a conventional seal.
  • the heat exchanger 5 is formed by a casing 50 which extends longitudinally between its two ends 51, 52. At each end 51, 52, the casing 50 has a shoulder 53 which delimits each end 51, 52. Between each end shoulder 53 is defined a central part 54 of the casing 50 which contains the plasma tube 3. Thus, each end 51, 52 of the casing 50 contains a part of an electrode 33 and the rigid portion of the sheath 34. In this example, the shoulder 53 also marks a reduction in the diameter of the casing 50 relative to the diameter of the casing 50 in its central part 54.
  • the envelope 50 entirely contains the plasma tube 3 and forms a double skin.
  • the plasma tube 3 and the heat exchanger 5 thus form an inseparable whole. In this sense, it is possible to qualify the flash lamp 1 as a double skin lamp.
  • the casing 50 has an inlet port 55 and an outlet port 56 for calorific fluid.
  • the inlet orifice 55 and the outlet orifice 56 contribute to generating a circulation of calorific fluid around the plasma tube 3.
  • the inlet orifice 55 and the outlet orifice 56 are respectively arranged near one end 51, 52 of the casing 50. The positioning of the inlet orifice 55 and of the outlet orifice 56 at each end 51, 52 of the casing 50 helps to optimize the circulation of calorific fluid.
  • a sufficient flow rate corresponds to a flow rate of between 4 and 12 liters per minute.
  • a sufficient flow of calorific fluid can be obtained when the flash lamp 1 is designed according to a length ratio of the plasma tube 3 to the internal diameter of the casing 50 which is between 10 and 20 and preferably this ratio is between 13 and 17.
  • the inlet orifice 55 and the outlet orifice 56 are extended externally by a duct which extends from the heat exchanger 5 in a direction opposite to the plasma tube 3. Said duct extends over a distance comprised between 15 mm and 20 mm.
  • the inlet orifice 55 and the outlet orifice 56 extend along an axis perpendicular to the longitudinal median axis of the casing 50.
  • the ducts of the orifice d The inlet 55 and the outlet port 56 are parallel to each other and extend in the same direction.
  • the inlet orifice 55 and the outlet orifice 56 protrude from the casing 50 and released laterally with respect to the longitudinal axis of the plasma tube 3.
  • Each orifice 55, 56 extends at an angle of 90 ° with respect to the longitudinal axis of the plasma tube 3.
  • This configuration makes it possible to constrain the entry and exit of calorific fluid within the heat exchanger 5.
  • This constraint generates a turbulent flow within the exchanger thermal 5.
  • a turbulent flow makes it possible to improve the heat exchange between the heat transfer fluid and the plasma tube 3. The cooling of the flash lamp 1 is thereby improved.
  • each orifice 55, 56 can extend at an angle greater than 45 ° with respect to the longitudinal axis of the plasma tube 3.
  • the orifices 55, 56 and their extension constitute mechanical connectors configured to be connected respectively to a duct of a cooling system for flash lamp 1.
  • Each orifice 55, 56 can have an internal diameter which is less than the diameter of the casing 50.
  • the internal diameter of each orifice 55, 56 can be between 5 mm and 10 mm.
  • each orifice 55, 56 also contributes to generating a flow of turbulent calorific fluid.
  • each spring seal 57 is a seal.
  • each spring seal 57 comprises a structure made of elastic material.
  • the elastic material can be constituted by natural or synthetic rubber, or any other polymeric material having elastic properties.
  • each spring seal 57 is equipped with a spring.
  • the spring may be arranged around the periphery of the elastic structure or be integrated into this elastic structure by overmolding.
  • the plasma tube 3 and the casing 50 of the heat exchanger 5 are made of a material which has optical properties of transparency over the entire electromagnetic spectrum emitted by the flash lamp 1. As a For example, it is possible to use fused silica material.
  • the transmission power of a flash lamp 1 according to the invention depends on several parameters.
  • the C and V parameters are identified in the power electronics module. These parameters are determined based on the characteristics of flash lamp 1.
  • Example 2 Plasma tube length (in mm) 100-200 200-400 Internal diameter plasma tube (in mm) 1-10 1-10 Internal diameter Enclosure (in mm) 10-20 10-20 Capacity (in ⁇ F ) 40-60 40-60 Applied voltage (in Volt) 1800-3200 3200-4200 Flash duration (in ⁇ s ) 80-220 200-220 Flash Power (in Megawatt) 0.9-1.5 1.3-2.5
  • the flash lamp 1 is configured to operate within an optical module 6.
  • the optical module 6 constitutes a second aspect of the present invention.
  • the optical module 6 has at least two blocks: a support block 7 and a reflector block 8 which can be separated from one another.
  • the support block 7 is formed by the covering 60 of the optical module 6.
  • the covering 60 comprises a support plate 61 which preferably extends in a plane.
  • the support plate 61 is delimited by peripheral edges.
  • the peripheral edges are formed by four sides which define a rectangular shaped support plate 61.
  • the support plate 61 could take a multitude of forms.
  • the cover 60 also has side walls 62 which extend from the peripheral edges perpendicular to the plane of the support plate 61.
  • the support block 7 is equipped with a window 70.
  • the window 70 is provided in the support plate 61.
  • the window 70 is delimited laterally by an internal border 63 of the support plate 61.
  • two lateral spaces 64 of the optical module 6 are defined between the internal border 63 and the peripheral edges of the support plate 61.
  • the window 70 is transparent to at least UV rays so as to diffuse the electromagnetic radiation from the flash lamp 1 towards a target zone 2.
  • the window 70 is transparent for the entire electromagnetic spectrum emitted. by the flash lamp 1.
  • the transparent window 70 can be made of a material which has optical properties similar to the material used for making the plasma tube 3 and the casing 50.
  • the support block 7 also comprises a receptacle 71 of the flash lamp 1.
  • the receptacle 71 and the flash lamp 1 are configured so that the flash lamp 1 is positioned in a removable manner in the receptacle 71 by interlocking. This removable nature facilitates the assembly / disassembly of the flash lamp 1 and more generally the maintenance of the flash lamp 1 and of the optical module 6.
  • the receptacle 71 makes it possible to maintain the flash lamp 1 in position in the axis of the window 70.
  • the receptacle 71 has a first support 72 and a second support 73 which are arranged on either side. of the window 70.
  • Each support 71, 72 is secured to the support plate 61 in a lateral space 64 of the optical module 6.
  • Each support 72, 73 is positioned along a median longitudinal axis of the window 70.
  • the two supports 72, 73 are in the form of a quadrangular element configured to receive one end 51, 52 of the casing 50 of the flash lamp 1.
  • Each support 72, 73 comprises a keying 74, preferably, the keying 74 consists of a housing provided on its upper face. More precisely, the housing extends longitudinally from one side of the proximal support of the window 70 towards the opposite side of the support, without however joining it. The opposite side of the support is distal to window 70.
  • the keying 74 is advantageously configured so as to receive an end 51, 52 of the casing 50.
  • the shape and the dimensions of the housing are configured in a specific way to receive an end 51, 52 of the casing 50.
  • the shoulder 53 of this end 51, 52 is placed in abutment on the side of each support 72, 73 which is proximal of window 70.
  • Each keying device 74 ensures that the flash lamp 1 is positioned along the median longitudinal axis of the window 70.
  • the housing extends along the longitudinal axis median of the window 70 so that the flash lamp 1 extends along the same axis. This characteristic makes it possible to optimize the diffusion of the irradiations towards the target zone 2 through the window 70.
  • each keying 74 has a groove 75 which extends from the housing of the keying 74 to the side of each support 72, 73 which is distal from the window 70.
  • the groove 75 is configured to cooperate with the portion of the sheath 34 which extends outside of flash lamp 1.
  • the groove 75 contributes to the release of the sheath 34 from the support block 7.
  • the support block 7 has electronic sensors controlling the correct operation of the optical module 6.
  • a UV detector UV photodiode
  • the support unit 7 can also be equipped with a glass breakage detector which makes it possible to check the integrity of the window 70 and / or of the flash lamp 1.
  • the electronic sensors are arranged at the level of one of the two supports 72, 73. In this example, the electronic sensors are arranged at the level of the support 73.
  • the support plate 61 has holes so that the electronic sensors are pointed towards the target zone 2.
  • the sensors The electronics are powered by a low voltage power supply 76.
  • the low voltage power supply 76 may be formed by a conventional twelve volt electronic power supply. In this example, the low voltage power supply 76 is released laterally from the optical module 6.
  • the two supports 72, 73 can be designed in a polymeric and / or composite material.
  • fluoro-polymers such as polyvinylidene fluoride (PVDF) or polytetrafluroethylene (PTFE).
  • PVDF polyvinylidene fluoride
  • PTFE polytetrafluroethylene
  • a fluoropolymeric material is resistant to electromagnetic radiation from UV light. Such a choice makes it possible to increase the longevity of the support block 7.
  • the support block 7 is configured to cooperate with the reflector block 8.
  • the reflector block 8 fits specifically with the support block 7 from above the latter.
  • the reflector unit 8 comprises a reflector 80.
  • the reflector 80 is formed in the mass. This means that it is shaped in one piece from the mass of a specific block of material.
  • the material is chosen to be metallic in nature.
  • the reflector 80 provides a first function of reflection and concentration of the electromagnetic radiation from the flash lamp 1 towards the target zone 2.
  • the reflector 80 is a quadrangular piece which has an upper face 800 and two lateral faces 801 which extend longitudinally on both sides other of the upper face 800.
  • the upper face 800 and the side faces 801 form a cover configured to cover the window 70.
  • the reflector 80 has a groove 81 which extends longitudinally in the quadrangular piece.
  • the groove 81 is formed in the mass of the quadrangular part.
  • the groove 81 crosses the quadrangular part longitudinally so as to form a tunnel.
  • the groove 81 is preferably polished so as to exhibit optical reflection properties.
  • the groove 81 ensures the reflection and the concentration of the electromagnetic radiation from the flash lamp 1 towards the target zone 2.
  • the reflector 80 can be made of a metallic material such as steel and preferably aluminum.
  • the objective of the reflector 80 is to reflect the electromagnetic radiation emitted by the flash lamp 1 and in particular the UV part of this radiation.
  • the polished aluminum reflects 80% of the electromagnetic UV radiation emitted by the flash lamp 1.
  • the reflector 80 has dimensions slightly greater than those of the window 70 so as to bear on the support plate 61 between the internal edge 63 and the peripheral edges.
  • the reflector 80 is shaped so as to cover, on the one hand, the flash lamp 1 positioned in its receptacle 71, and on the other hand, the window 70 formed in the support plate 61.
  • the reflector unit 8 also comprises a first lateral element 82 and a second lateral element 83.
  • the two lateral elements 82, 83 are secured to the optical reflector 80. More precisely, the two lateral elements 82, 83 are secured to the optical reflector 80 of on either side of the groove 81 at each of its ends 810, 811. Thus, an upper face of each lateral element 82, 83 laterally extends the upper face 800 of the reflector 80.
  • Each side element 82, 83 is configured to cooperate with a support 72, 73 determined for the receptacle 71 of the flash lamp 1.
  • each side element 82, 83 comprises a housing complementary to the housing of the keying 74 of each support 72, 73 The complementary housing ensures a fitting of a side element 82, 83 with a support 72, 73 while maintaining the flash lamp 1 in position within the optical unit 6.
  • each side element 82, 83 comprises a groove 84 complementary to the groove 75 for releasing each support 72, 73.
  • the grooves 75, 84 respectively arranged on a support 72, 73 and on a side element 82, 83 jointly contribute to release laterally the outer portions of the sheaths 34 of the support block 7 and of the reflector unit 8. Consequently, the flash lamp 1 has two electrical connectors 35 which are isolated from the reflector unit 8 and from the support unit 7 by lateral release at the level of the receptacle 71 of the flash lamp 1 (illustrated in figure 1 and 4 ).
  • the electrical connectors 35 are connected by cables to a high voltage box independent of the optical module 6.
  • each side element 82, 83 can be designed in a polymeric and / or composite material.
  • the supports 72, 73 of the support block 7 and for the same reasons, it is preferable to use a polymeric / composite material resistant to UV radiation.
  • the reflector unit 8 is removably connected to the support unit 7.
  • the optical module 6 comprises mechanical means 9 which can be removed manually.
  • these mechanical means 9 can be formed by captive screws. This feature allows an operator to perform a maintenance operation without using a tool.
  • the mechanical means 9 cooperate with a first bore 90 produced at a determined position in each lateral element 82, 83.
  • the mechanical means 9 also cooperate with a second bore 91 which is produced at a determined position in each of the supports 72, 73.
  • the position of the second bore 91 corresponds to the position of the first bore 90 so that they are positioned along a common axis when the reflector unit 8 is nested with the support block 7.
  • the optical module 6 is advantageously equipped with gripping means 65.
  • the gripping means 65 are integral with the reflector unit 8 at the level of the upper face 800 of the reflector 80.
  • the gripping means 65 are formed by a handle.
  • the gripping means 65 allow an operator to easily separate the reflector unit 8 from the support unit 7 in order to carry out maintenance operations. Obviously, the assembly of the reflector unit 8 on the support unit 7 is also facilitated and accelerated during the assembly or reassembly of the optical unit 6.
  • the reflector unit 8 comprises a cooling system for the optical module 6.
  • the cooling system comprises at least one cooling circuit 10 with calorific fluid.
  • the cooling circuit 10 is at least partially integrated into the reflector 80.
  • the cooling circuit 10 is supplied with calorific fluid by a hydraulic connection 11, 16.
  • the hydraulic connection 11, 16 is arranged on the first lateral element 82 of the reflector unit 8.
  • the calorific fluid inlet is connected to a first hydraulic connection 11.
  • This configuration makes it possible to transmit the calorific fluid directly to the heat exchanger 5 of the flash lamp 1. It is only in a second step that the calorific fluid enters the cooling circuit 10.
  • the calorific fluid inlet is connected to a second hydraulic connection 16.
  • This configuration makes it possible to transmit the calorific fluid directly into the cooling circuit 10.
  • the reflector 80 is cooled by a cooler calorific fluid. Such a configuration makes it possible to cool the reflector 80 better when the flash frequency is greater than or equal to 1 Hz.
  • each side element 82, 83 is equipped with means for connection 12, 13 to the inlet port 55 and / or to the outlet port 56 of the casing 50 of the heat exchanger 5.
  • connection means 12, 13 are configured so as to engage with the inlet port 55 and / or the port output 56 which are held in position by the polarizer 74.
  • the first hydraulic connection 11 is connected to the inlet port 55 of the heat exchanger 5 through the connection means 12. of the first lateral element 82.
  • the outlet orifice 56 is connected to the connection means 13 of the second lateral element 83.
  • the connection means 13 are connected to the cooling circuit 10 of the reflector 80 via a duct outer 14.
  • the outer duct 14 connects to the part of the cooling circuit which is integrated with the reflector 80.
  • the connection between the outer duct 14 and the part of the cooling circuit 10 which is integrated with the reflector 80 is positioned level. of the first side element 82.
  • connection means 12, 13 can be respectively constituted by a socket.
  • the sleeve has an internal diameter greater than the diameter of each orifice 55, 56.
  • Each orifice 55, 56 thus constitutes a male mechanical connector configured to form a mechanical connection with the connection means 12, 13 which are of the female type.
  • connection means 12, 13 and the orifices 55, 56 are made by fitting the orifices 55, 56 into the connection means 12, 13. Said connections constitute the only mechanical connections between the lamp. flash 1 and reflector unit 8.
  • each spring seal 57 is inserted inside a socket of a connection means 12, 13. This has the effect of reducing the mechanical stresses which apply to the level of the fixings of the flash lamp 1.
  • the spring seal 57 advantageously makes it possible to limit breakages of flash lamp 1 during their installation or replacement. Furthermore, during use, the spring seal 57 makes it possible to place the flash lamp 1 in suspension by creating an elastic mechanical connection.
  • the spring of the spring seal 57 produces, before the arrival of the calorific fluid, a preload inside the sleeve which ensures the tightness of the connection in the absence of calorific fluid or when the calorific fluid arrives. calorific fluid.
  • the elasticity of the seal 57 also allows it to compress when the pressure of the calorific fluid increases, thus ensuring a perfect seal of the hydraulic connection. This feature contributes to increasing the security of the optical module 6.
  • the cooling circuit 10 is partially integrated into the mass of the reflector 80.
  • the cooling circuit 10 comprises a heat exchanger 15.
  • the heat exchanger 15 runs longitudinally through the reflector 80.
  • the heat exchanger 15 performs at least one back and forth on either side of the groove 81.
  • a second hydraulic connection 16 for the calorific fluid.
  • the second hydraulic connection 16 is arranged at the level of the first lateral element 82.
  • first hydraulic connection 11 and the second hydraulic connection 16 are respectively connected to a calorific fluid supply system.
  • connection of the inlet and the outlet of calorific fluid can be reversed on the first hydraulic connection 11 and the second hydraulic connection 16. The direction of circulation of the calorific fluid is then reversed.
  • the duct of the heat exchanger 15 can be oxidized beforehand.
  • the oxidation of the pipe of the heat exchanger 15 leads to a pipe of aluminum oxide (Al2O3) or commonly called alumina which has insulating properties.
  • Al2O3 aluminum oxide
  • the low thickness of alumina (a few ⁇ m) will not cause cooling problems.
  • the alumina has a thermal conductivity of 10.9 W.m-1.K-1 which ensures the cooling of the reflector 80.
  • the calorific fluid supply system may comprise means for circulating the calorific fluid and a reservoir of calorific fluid.
  • the calorific fluid supply system is outside the optical module 6. This is in order to reduce the risk of an electric arc phenomenon.
  • the circulation means can be formed by a pump connected to a gas reservoir or having an ambient air intake.
  • the circulation means may consist of a pump drawing from a calorific liquid reservoir.
  • a deionizer filter is advantageously placed between the reservoir and the pump. The deionizer filter eliminates any ions that may have been captured by the calorific fluid during its journey.
  • this cooling system is configured so as to be removably connected with the heat exchanger 5 of the flash lamp 1. This characteristic makes it possible to simplify the maintenance operations of the optical module 6.
  • the calorific fluid first passes through the heat exchanger 5 of the flash lamp 1. This makes it possible to prevent a calorific fluid from becoming charged with ions by passing through the mass of the metallic reflector 80 before being in contact with the plasma tube 3. Now, this contributes to reducing the risk of an electric arc phenomenon occurring in the cooling system.
  • the heat transfer fluid passes through the external duct 14 in order to enter the heat exchanger 15 of the reflector 80 at the level of the first side element 82.
  • the calorific fluid joins via the second hydraulic connection 16 the calorific fluid supply system. It should be noted that the circulation of the calorific fluid within the cooling system and the heat exchanger 5 is shown schematically on the figures 4 and 5 by following arrows.
  • first hydraulic connection 11 and the second hydraulic connection 16 of the cooling circuit 10 are both arranged on the same side of the reflector 80.
  • the first hydraulic connection 11 and the second hydraulic connection 16 are arranged. at the level of the first lateral element 82.
  • This characteristic also contributes to reducing the risk of an electric arc phenomenon occurring at the periphery of the optical module 6.
  • the calorific fluid supply is therefore perfectly isolated from the high voltage supply of flash lamp 1.
  • the low voltage power supply 76 of the optical module 6 is integrated on the other side of the reflector 80, in the second support 73 of the receptacle 71.
  • the supply of calorific fluid is effected on one side of the reflector 80 while the low voltage supply of the electronic part of the optical module 6 is effected on the other side of the reflector 80.
  • the high voltage electrical connectors 35 of the flash lamp 1 are isolated and released laterally from the optical module 6. All these characteristics and their arrangement contribute to reducing the generation of an electric arc during the operation of the optical module 6 or d. 'a maintenance operation.
  • a cover may be provided in order to cooperate with the side walls 62 with a view to closing the cover 60 of the optical module 6 on the upper side.

Landscapes

  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP20152319.8A 2019-01-16 2020-01-16 Optisches modul mit gepulster blitzlampe Active EP3686919B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1900396A FR3091784B1 (fr) 2019-01-16 2019-01-16 Lampe flash à lumière pulsée et module optique de lumière pulsée intégrant cette lampe

Publications (3)

Publication Number Publication Date
EP3686919A1 true EP3686919A1 (de) 2020-07-29
EP3686919C0 EP3686919C0 (de) 2025-03-12
EP3686919B1 EP3686919B1 (de) 2025-03-12

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EP (1) EP3686919B1 (de)
FR (1) FR3091784B1 (de)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6402111A (de) * 1963-06-26 1964-12-28
US4464336A (en) 1980-05-15 1984-08-07 Ushio Denki Kabushikikaisha Method of sterilization
GB2360946A (en) * 2000-04-08 2001-10-10 Lynton Lasers Ltd Dermatological treatment apparatus
US6566659B1 (en) 1996-02-15 2003-05-20 Purepulse Technologies, Inc. Parametric control in pulsed light sterilization
EP1547538A1 (de) * 2003-12-26 2005-06-29 Eurofeedback Handstück mit zumindest einer Blitzlampe
WO2008012519A1 (en) 2006-07-24 2008-01-31 Energist Limited Intense pulsed light device
EP1906856A1 (de) * 2005-07-13 2008-04-09 PerkinElmer Optoelectronics GmbH &amp; Co. KG Blitzlampeneinsatz für entfernbaren anschluss an eine buchse
FR2951949A1 (fr) * 2009-10-30 2011-05-06 Claranor Dispositif de traitement par lumiere pulsee refroidi .
US20110238142A1 (en) * 2008-09-16 2011-09-29 Dermeo Handpiece with Cartridge for a Skin Photo-Tratment Apparatus
US20140001947A1 (en) * 2011-03-29 2014-01-02 Panasonic Corporation Stroboscopic device
WO2016012488A2 (fr) 2014-07-25 2016-01-28 Eurofeedback Dispositif uvc de decontamination et de detoxification

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6402111A (de) * 1963-06-26 1964-12-28
US4464336A (en) 1980-05-15 1984-08-07 Ushio Denki Kabushikikaisha Method of sterilization
US6566659B1 (en) 1996-02-15 2003-05-20 Purepulse Technologies, Inc. Parametric control in pulsed light sterilization
GB2360946A (en) * 2000-04-08 2001-10-10 Lynton Lasers Ltd Dermatological treatment apparatus
EP1547538A1 (de) * 2003-12-26 2005-06-29 Eurofeedback Handstück mit zumindest einer Blitzlampe
EP1906856A1 (de) * 2005-07-13 2008-04-09 PerkinElmer Optoelectronics GmbH &amp; Co. KG Blitzlampeneinsatz für entfernbaren anschluss an eine buchse
WO2008012519A1 (en) 2006-07-24 2008-01-31 Energist Limited Intense pulsed light device
US20110238142A1 (en) * 2008-09-16 2011-09-29 Dermeo Handpiece with Cartridge for a Skin Photo-Tratment Apparatus
FR2951949A1 (fr) * 2009-10-30 2011-05-06 Claranor Dispositif de traitement par lumiere pulsee refroidi .
US20140001947A1 (en) * 2011-03-29 2014-01-02 Panasonic Corporation Stroboscopic device
WO2016012488A2 (fr) 2014-07-25 2016-01-28 Eurofeedback Dispositif uvc de decontamination et de detoxification

Also Published As

Publication number Publication date
FR3091784B1 (fr) 2021-07-16
FR3091784A1 (fr) 2020-07-17
EP3686919C0 (de) 2025-03-12
EP3686919B1 (de) 2025-03-12

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