Waterproof ultraviolet light emission module

Abstract

A waterproof ultraviolet light emission module is provided, capable of preventing degradation of an LED die due to moisture and degradation of an LED die due to heat. An ultraviolet LED pack 10 is mounted on a mounting substrate 20. A lens 40 has a lens body 41 with a dome shape and a flange part 42. The flange part 42 of the lens 40 is positioned between a cover 50 and a housing 30, and the cover is pressed and fixed against the housing by a fastening element 60. The housing 30 has a convex rib 41 provided on it. The underside of the flange part 42 of the lens 40 is deformed by being pressed against the rib, thus sealing a space in the lens 40.

Description

TECHNICAL AREA

[0001] The present invention relates to a light emission module which emits ultraviolet light. TECHNICAL BACKGROUND

[0002] A device is known that sterilizes fluids, such as water and air, by irradiating the fluids with ultraviolet light.

[0003] For example, PTL 1 discloses a device configured such that a transparent tube is spirally wound and arranged within a housing, with water flowing through the tube, and wherein a semiconductor light-emitting element arranged on the inner wall of the housing irradiates the water flowing through the tube with ultraviolet light to sterilize the water. A fluorine-based plastic or a silicone-based plastic is used as the material for the tube.

[0004] Furthermore, PTL 2 discloses a light emission unit configured to emit ultraviolet light, arranged within a duct of a vehicle air conditioning system. Here, the light emission unit irradiates air flowing through the interior of the duct with ultraviolet light. The light emission unit has a structure comprising a multitude of ultraviolet light emission elements rigidly arranged around the perimeter of a support plate, which is connected to a heat sink and a heat dissipation fin.

[0005] Furthermore, it is known that the semiconductor light-emitting element which emits ultraviolet light has a property that the material of the semiconductor light-emitting element degrades easily due to moisture, compared to light-emitting elements which emit light with other wavelengths.

[0006] PTL 3 discloses a light emission module with a water-resistant or waterproof structure, in which a recessed part is provided in a housing made of plastic, wherein a packed or packed light emission element is arranged within the recessed part, and wherein the light emission element is covered with a lens having a space provided therein. It is described that the light emission element can be a light emission element with a wavelength of ultraviolet light. CITATION LIST PATENT LITERATURE PTL 1: JP 2018-148938A PTL 2: JP 2022-113426A PTL 3: JP 2022-125391A SUMMARY OF THE INVENTIONAL PROBLEM

[0007] PTL 1 and PTL 2 do not describe a waterproof structure of a light-emitting element that emits ultraviolet light.

[0008] Although, on the other hand, PTL 3 discloses a light emission module with a waterproof structure, which is implemented by covering a light source with a housing made of a plastic and a lens, there is no description of a specific structure regarding a waterproof structure of a connecting part between the lens and the housing.

[0009] Since a light-emitting element that emits ultraviolet light is made of a material that degrades easily due to moisture compared to light-emitting elements with other wavelengths, it is important to provide a waterproof structure for the connection between the lens and the housing. However, because ultraviolet light causes degradation or decomposition of plastics, a waterproof structure made of plastic, such as an O-ring, cannot be used.

[0010] Furthermore, the light-emitting element that emits ultraviolet light generates a greater amount of heat than those emitting light with other wavelengths. In this case, it becomes difficult to dissipate heat into the air or surrounding environment if the space around the light-emitting element is sealed to achieve a watertight structure.

[0011] One objective of the present invention is to provide a water-resistant or waterproof ultraviolet light emission module which can prevent degradation of an LED die or LED component due to moisture and can prevent degradation of the LED die due to heat. SOLUTION TO THE PROBLEM

[0012] To achieve the above-described objective, a water-resistant or waterproof ultraviolet light emission module of the present invention comprises an ultraviolet or UV light source, a mounting substrate, a housing, a lens, a cover, and a mounting element. The ultraviolet light source is an LED pack configured such that an LED die emitting ultraviolet light is enclosed within the pack. The mounting substrate has wiring, is configured to accommodate the ultraviolet light source, and is arranged on the housing. The housing has a plate shape that allows the mounting substrate to be attached to it.The lens is formed from a material that allows ultraviolet light to pass through it and has a dome-shaped lens body arranged to cover the ultraviolet light source, with a space between the lens and the light source. A flange portion is provided for integration with a circumferential edge portion of the lens body. The cover protects the flange portion of the lens. The fastening element presses the cover against the housing, fixing the cover to the housing in a position where the flange portion of the lens is positioned between the cover and the housing. The housing has a convex rib provided on a portion of it in contact with the flange portion of the lens, and the convex rib is formed along a circumferential edge of the mounting substrate.Part of the underside of the flange part of the lens, which is in contact with the rib, is deformed by being pressed against the rib by the cover, thus sealing the space in the lens. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0013] According to the present invention, it is possible to provide a water-resistant or waterproof ultraviolet light emission module with high water resistance and heat resistance. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view of a water-resistant or waterproof ultraviolet light emission module 1 according to an embodiment of the present invention. Fig. Figure 2 is a cross-sectional view taken along a line AA of the waterproof ultraviolet light emission module 1 according to the embodiment. Fig. Figure 3 is a cutaway perspective view of the waterproof ultraviolet light emission module 1 according to the embodiment. Fig. Figure 4 is a perspective view of each component forming the waterproof ultraviolet light emission module 1 according to the embodiment. Fig. Figure 5 is a cross-sectional view illustrating the structure of an ultraviolet light source (an LED pack) of the waterproof ultraviolet light emission module 1 according to the embodiment. Fig. Figure 6 is an illustration that demonstrates the properties of water resistance and moisture resistance of the waterproof ultraviolet light emission module 1 according to the exemplary embodiment. Fig. Figure 7 is a cutaway perspective view illustrating an assembly process of the waterproof ultraviolet light emission module 1 according to the embodiment. Fig. Figures 8(a) to 8(c) are perspective views of the waterproof ultraviolet light emission module 1 according to modifications of the embodiment. DESCRIPTION OF EXAMPLES OF EXECUTION

[0014] An embodiment of the present invention is described below.

[0015] A waterproof ultraviolet light emission module 1 according to the exemplary embodiment is manufactured using the Fig. 1 to 7 described. Fig. Figures 1 to 3 are a perspective view, a cross-sectional view taken along a line AA, and a cutaway perspective view of the waterproof ultraviolet light emission module 1. Fig. Figure 4 is a perspective view of each component that forms the waterproof ultraviolet light emission module 1. Fig. Figure 5 is a figure illustrating the structure of an ultraviolet light source (an LED pack) of the waterproof ultraviolet light emission module 1. Fig. Figure 6 is an illustration demonstrating water resistance and moisture resistance, and Fig. Figure 7 is an illustration that depicts an assembly process. <<Konfiguration des wasserdichten Ultraviolett-Lichtemissionsmoduls 1> >

[0016] First, a configuration of the waterproof ultraviolet light emission module 1 is described.

[0017] As in the Fig. As illustrated in Figures 1 to 4, the waterproof ultraviolet light emission module 1 comprises an ultraviolet light source 10, a mounting substrate 20, a metal housing 30, a lens 40, a cover 50 and a mounting element 60. <Ultraviolett-Lichtquelle (Ultraviolettlicht-LED-Packung) 10>

[0018] As in Fig. As illustrated in Figure 5, the ultraviolet light source 10 is an LED pack configured such that an LED die 11, which emits ultraviolet light, is mounted on a packing substrate 12 made of ceramic or the like, and a space around the perimeter of the LED die 11 mounted on the packing substrate 12 is sealed with a sealing element 13 made of quartz glass having a hemispherical shape or the like. Hereinafter, the ultraviolet light source 10 is referred to as an ultraviolet light LED pack 10.

[0019] Although this in Fig. As not illustrated in Figure 5, the packing substrate 12 is provided with wiring, such as a via or through-hole connection, to supply energy to the LED die 11 and is connected to an electrode of the die 11 by solder, a connecting wire or similar.

[0020] The sealing element 13, which is made of quartz glass, has a contact part with the packing substrate 12, which is hermetically sealed by solder or similar.

[0021] As described above, the ultraviolet light LED pack 10 is a pack in which the LED die 11 is sealed only with an inorganic material.

[0022] The sealing element 13, which is made of quartz glass, does not allow water vapor to pass through it, and the contact part is hermetically sealed, thus making it possible to prevent water vapor from reaching the LED die 11 and to prevent deterioration or degradation of the LED die 11 due to water vapor.

[0023] The light emission wavelength of the LED die 11 can be selected depending on the target (bacteria or viruses) that is to be sterilized or inactivated. For example, it is possible to use an LED die 11 that emits ultraviolet light with a wavelength in the range of 100 to 280 nm, which has a strong inactivation capability against bacteria or viruses. <Befestigungssubstrat 20>

[0024] The mounting substrate 20 is an insulating substrate made of a glass composite material, which is provided with wiring comprising a via and an electrode. The mounting substrate 20 preferably has a reflective layer on its front surface configured to reflect ultraviolet light. For example, a solder resist ink or solder photoresist ink with high ultraviolet reflectance is applied to the front surface of the mounting substrate.

[0025] One or more ultraviolet light LED packs 10 are attached to the mounting substrate 20 and are fixed to it by solder.

[0026] In the example that is in the Fig. As illustrated in Figures 1 to 4, two ultraviolet LED light packs 10 are mounted on a mounting substrate 20 with a predetermined gap between them. The mounting substrate 20 of the present embodiment has a similar shape to that of Figure 8, and the shape has approximately circular regions formed for two ultraviolet LED light packs, each to be mounted on it and connected to the other by a connecting region having a smaller diameter than that of the circular regions.

[0027] The wiring of the mounting substrate 20 is connected to the wiring of the packing substrate 12 of the mounted ultraviolet LED pack 10.

[0028] The mounting substrate 20 is arranged in a recessed portion formed in the top surface of the metal housing 30. The mounting substrate 20 is smaller than the top surface of the metal housing 30, and a top surface region of the metal housing 30, not covered by the mounting substrate 20, is present around the perimeter of the mounting substrate 20. <Gehäuse 30>

[0029] The housing 30 is a plate-shaped substrate configured to receive the mounting substrate 20. It has a shallow recess formed on its upper surface and configured to accommodate the mounting substrate 20. The shape of the recess is formed along the outer shape of the circumferential edge of the mounting substrate 20. The housing 30 preferably has high thermal conductivity and stiffness. For example, the housing 30 is preferably formed from a metal with high thermal conductivity (e.g., aluminum). Here, a housing 30 formed from die-cast aluminum is used. Hereinafter, the housing 30 is referred to as the metal housing 30.

[0030] It should be noted that housing 30 can also be molded from a plastic (engineering plastic) containing a metallic filler, such as aluminum or carbon. A polycarbonate, polyamide, or similar material can be used as the plastic to be mixed with a filler.

[0031] The metal housing 30 has a convex rib 31 provided on its upper surface and formed along the outer edge of the circumferential portion of the recessed part, which is shaped to receive the mounting substrate 20. The cross-sectional shape of the rib 31 is approximately a semicircle.

[0032] It should be noted that the metal housing 30 has a hole (for example, a screw hole) 33 in the mounting substrate and is shaped so that the mounting element 60 can be attached through it. <Linse 40>

[0033] The lens 40 is formed from a material through which ultraviolet light passes and has a dome-shaped lens body 41 and a flange part 42, which is shaped to be integrated with a circumferential edge part of the lens body 41. The lens body 41 is arranged on the mounting substrate 20 so that it covers the ultraviolet LED pack 10. Because the lens body 41 is dome-shaped, a space is provided between the lens body 41 and the ultraviolet LED pack 10.

[0034] The flange part 42 of the lens 40 covers a circumferential edge part of the mounting substrate 20 and a top of the metal housing 30 around the circumference of the mounting substrate 20.

[0035] Here, two dome-shaped lens bodies 41 are provided, each covering two ultraviolet LED packs 10. The two dome-shaped lens bodies 41 are connected to each other by the flange part 42. However, the shape of the lens 40 is not limited to this shape and can be a shape in which one dome-shaped lens body 41 covers two ultraviolet LED packs 10, with the flange part 42 provided around its circumference.

[0036] The lens 40 is preferably made of, for example, a plastic through which ultraviolet light passes, such as a silicone plastic, to ensure elasticity of the lens 40. A suitable elasticity is approximately 50 Shore A.

[0037] Furthermore, lens 40 can be made of a material with high thermal conductivity, such as glass. This configuration is described in a first modification.

[0038] It should be noted that the flange part 42 is designed so that it does not cover a position of the metal housing 30 where the hole 33 is located, which is formed in the metal housing 30 and is provided for the fastening element 60. <Abdeckung 50>

[0039] The cover 50 has an opening at its position corresponding to the position of the lens body 41 and is shaped to provide a form for covering the top of the flange part 42 of the lens 40.

[0040] The cover 50 has a through hole 51 (for example, a screw hole) which is shaped so that the fastening element 60 passes through it.

[0041] The cover 50 is preferably made of a material that has high stiffness and high reflectivity with respect to ultraviolet light. For example, an injection-molded aluminum cover 50 can be used. Alternatively, it is also possible to use a cover 50 molded from a high-stiffness plastic, for example, a plastic (engineering plastic) containing a metal filler such as aluminum or carbon. <Befestigungselement 60>

[0042] The fastening element 60 presses the cover 50 against the metal housing 30, so that the cover 50 is attached to the metal housing 30 in a state in which the flange part 42 of the lens 40 is positioned between the cover 50 and the metal housing 30. For example, a screw can be used for the fastening element 60. <Rippe 31>

[0043] The convex rib 31 is provided on a region of the upper surface of the metal housing 30 that is in contact with the flange part 42 of the lens 40 and is formed along the circumferential edge of the mounting substrate 20. A portion of the underside of the flange part 42 of the lens 40, which is in contact with the rib 31, is pressed against the rib 31 by the cover 50 and is deformed in such a way that a space within the lens 40 is physically and airtight sealed. The lens 40 is deformed along the shape of the rib 31 in a fixing manner due to its elasticity. Accordingly, the portion of the lens 40 that is compressed by the rib 31 can be sealed, thus providing a strong sealing function and preventing water from infiltrating or entering the waterproof ultraviolet light emission module 1.

[0044] In this case, a circumferential edge 21 of the mounting substrate 20 is designed to be located outside an inner circumferential edge portion 31 of the lens body 41, which is located on the side of the ultraviolet LED pack, and is designed to be located inside the rib 31 of the metal housing 30. In this arrangement, the underside of the lens body 41 and the underside of the flange portion 42, which are located between the inner circumferential edge portion 43 of the lens body 41 and a contact portion of the flange portion 42 with the rib 31, are in contact with the circumferential edge portion of the mounting substrate 20. Furthermore, the force by which the cover 50 is attached to the flange portion 42 can be applied as a force by which the circumferential edge portion of the mounting substrate 20 is pressed against the metal housing 30.

[0045] Accordingly, the mounting substrate 20 can be pressed against the housing 30 and fixed to it without using a screw or similar. <Stufe 44>

[0046] Preferably, a step 44 is provided on the underside of the flange part 42 of the lens 40 and is formed along the circumferential edge of the mounting substrate 20. A region inside the step 44 (a region from the step 44 to the edge part 43) is in contact with the top surface of the mounting substrate 20. A region outside the step 44 (a region from the step 44 to the outer circumference of the flange part 42) is in contact with the top surface of the metal substrate.

[0047] Since the underside of the region within the step 44 of the lens 40 (the region from step 44 to edge part 43) can be brought into close contact with the top of the mounting substrate 20, a force by which the lens 40 presses the circumferential edge of the mounting substrate 20 against the metal housing 30 can be applied evenly to the mounting substrate 20, thereby fixing the mounting substrate 20 more firmly.

[0048] In other words, the flange part 42 of the elastic lens 40 has a surface (the region from the step 44 to the edge part 43) designed to press onto the mounting substrate 20, separately from a surface of the flange part 42 (the region from the step 44 to the edge part 43) that is in contact with the rib 31 to form a sealing surface, thereby compressing the mounting substrate 20 to suppress or prevent a deviation of the position of the mounting substrate 20, which presses onto the metal housing 30, relative to the metal housing 30.

[0049] As described above, the entire underside of the mounting substrate 20 can be brought into contact with the metal housing 30 because a strong force is applied by the lens 40 to press the mounting substrate 20 against the metal housing 30. As a result, heat emitted by the ultraviolet LED pack 10 is conducted to the mounting substrate 20 and distributed across its entire surface. The heat is then conducted from the entire underside of the mounting substrate 20 to the metal housing 30, allowing the heat to be dissipated from the underside of the metal housing 30 to the outside. <Thermisch leitfähiges Flächenelement 70>

[0050] A thermally conductive surface element 70 with insulating properties is arranged between the underside of the mounting substrate 20 and the metal housing 30. In this way, the underside of the mounting substrate 20 can be electrically insulated from the metal housing 30, and at the same time, thermal conductivity from the back of the mounting substrate 20 to the top of the metal housing 30 can be further improved.

[0051] For example, a surface element made of silicone rubber can be used as the thermally conductive surface element 70. <Leistungsversorgungsleitung 90>

[0052] As in Fig. As illustrated in Figure 4, the metal housing 30 and the thermally conductive surface element 70 each have a first through-hole 32 and a second through-hole 71, respectively, shaped to extend through the metal housing in the thickness direction and positioned at corresponding (overlapping) points. A power supply line 90 is arranged to pass through the first through-hole 32 and the second through-hole 71. One end of the power supply line 90 is connected to the wiring on the underside of the mounting substrate 20, and the other end extends outwards from the underside of the metal housing 30. Energy is thus supplied to the ultraviolet LED pack 10 via the power supply line 90, enabling the ultraviolet LED pack 10 to emit light.

[0053] The first through-hole 32 in the metal housing 30 is blocked by a filling element 80 and is made watertight so that water droplets are prevented from infiltrating or penetrating the interior. <<Betrieb von jedem Teil während der Emission von ultraviolettem Licht> >

[0054] A description of the function of each part is set out in a case where the ultraviolet light is emitted by the waterproof ultraviolet light emission module 1.

[0055] When energy is supplied to the ultraviolet LED pack 10 from the power supply line 90, the internal LED die 11 emits ultraviolet light. The emitted ultraviolet light passes through the sealing element 13, which is made of quartz glass, passes through the lens body 41 of the lens 40, and is emitted outwards.

[0056] The flange part 42 of the lens 40 has the step 44, and the flange part 44 presses the mounting substrate 20 with a force by which the fastening element 60 secures or fixes the cover 50. Since positional deviation of the mounting substrate 20 can be prevented, the position of the sealing element 13 of the ultraviolet LED pack 10 on the mounting substrate 20 and the position of the lens body 40 can be determined, thus preventing a deterioration of the light distribution. In a case where the flange part 42 is not provided and where the lens is only connected to a region of the top of the mounting substrate 20, the fixed state of the lens is still not stable, and this is undesirable. Therefore, the flange part 42 is formed over a wider region than the rib 31 of the metal housing 30 to prevent a deterioration of the light distribution and to ensure water resistance.To improve water resistance.

[0057] Heat emitted by the LED die 11 is conducted to the packing substrate 12 and then to the mounting substrate 20. The heat is then distributed across the entire mounting substrate 20. From the underside of the mounting substrate 20, the heat is conducted through the thermally conductive surface element 70 to the top of the metal housing 30. Since the metal housing 30 is made of a metal with good thermal conductivity, the heat is dissipated from the metal housing 30 to the outside.

[0058] Since the heat generated by the LED die 11 can be efficiently dissipated through the metal housing 30, it is possible to improve the lifetime of the LED die 11 and suppress deterioration or degradation in the ultraviolet light LED pack.

[0059] Even if a device in which the waterproof ultraviolet light emission module 1 is arranged is exposed to water droplets or if it is placed in a high-humidity environment, water droplets do not enter the interior of the lens 40 because the flange part 42 is pressed against the top of the metal housing 30 and the rib 31 by the cover 50 at a contact point between the contact part 42 of the lens 40 and the metal housing 30. Furthermore, since the through-hole 32 is filled with the filler element 80, water droplets cannot enter the interior.

[0060] Even though lens 40 is made of plastic, water droplets cannot pass through lens 40, thus preventing water droplets from entering the space inside lens 40 ( Fig. 6).

[0061] In a case where the lens 40 is made of plastic, water vapor passes through the lens 40 and enters the space between the lens body 41 and the ultraviolet LED pack 10. However, since the sealing element 13 of the ultraviolet LED pack 10 is made of quartz glass, water vapor cannot enter the interior of the sealing element 13.

[0062] Since moisture (water droplets and water vapor) does not reach the LED die 11 of the ultraviolet light LED pack 10, degradation of the LED die 11 can consequently be prevented.

[0063] In this way, the waterproof ultraviolet light emission module 1 achieves waterproof functionality by sealing the LED die 11 in two stages through the ultraviolet light LED pack 10, in which the LED die 11 is sealed only with inorganic material and the metal housing 30 and the lens 40.

[0064] In the waterproof ultraviolet light emission module 1 of the present embodiment, the cover 50 is configured such that it is positioned at a distance from a light distribution element (the lens body 41 of the lens 40), and the flange part 42 of the lens 40 is attached to the metal housing 30 by the cover 50. Accordingly, there is a high degree of freedom in the design of the light distribution pattern (of the lens body 41).

[0065] Furthermore, ultraviolet light, which has passed through the lens body 41 and reached the flange part 42, can be reflected by the inner wall surface of the cover 50, which is in contact with the flange part 42, and can be emitted directly to the outside. Of the light reflected from the inner wall surface of the cover 50, light oriented towards the front of the mounting substrate 20 can be reflected by a light-reflecting layer arranged on the top of the mounting substrate 20 and can be emitted to the outside, thus allowing the light to be reused.

[0066] Since the entire flange part 42 of the lens 40 is compressed by the rigid frame-shaped cover 50, a force continues to be applied to the entire flange part 42, and as such, a deviation or displacement of the lens 40 is less likely to occur.

[0067] At the same time, a back pressure force generated by the elasticity of the lens 40 prevents a screw, which serves as a fastening element 60, from loosening, with the same effect as a spring washer. <<Montageverfahren von jedem Teil während der Emission von ultraviolettem Licht> >

[0068] A description of a mounting method for the waterproof ultraviolet light emission module 1 is given using the Fig. 4 to 7 explained.

[0069] As in Fig. As illustrated in Figure 4, the ultraviolet light LED pack 10 is attached to the substrate 20.

[0070] The thermally conductive surface element 70 is positioned on the metal housing 30, and the mounting substrate 20 is attached to it. The lens 40 is positioned on the metal housing 30, and then the cover 50 is positioned on it. As in Fig. As illustrated in Figure 7, the fastening element (screw) 60 is screwed into the screw hole 33 in the metal housing 30 through the through hole 51 in the cover 50.

[0071] As described above, the waterproof ultraviolet light emission module 1 can be manufactured. <<Erste Modifikation> >

[0072] A first modification of a waterproof ultraviolet light emission module is described.

[0073] In the embodiment described above, the lens 40 is formed from a plastic that allows ultraviolet light to pass through it, and the flange part 42 of the lens 40 is arranged between the cover 50 and the metal housing 30 to seal the lens 40. However, the lens can also be formed from a non-elastic material, such as glass.

[0074] If the lens 40 is made of glass or a similar material, an elastic sealing element is prepared and arranged on a part where the flange part 42 is in contact with the top surfaces of the metal housing 30 and the mounting substrate 20. In this way, the sealing of the lens 40 can be achieved similarly to the embodiment in question.

[0075] Preferably, the sealing element is a plastic that is resistant to degradation due to ultraviolet light, such as a silicone plastic. <<Zweite Modifikation> >

[0076] A second modification of a waterproof ultraviolet light emission module is constructed using Fig. 8 (a) used.

[0077] The modification in Fig. Figure 8(a) is an example in which a hook 61 is used as the fastening element 60 of the waterproof ultraviolet light emission module. Another structure, similar to the hook 61, can be used as the fastening element 60, provided that the structure is capable of pressing the cover 50 against the metal housing 30. <<Dritte Modifikation> >

[0078] A waterproof ultraviolet light emission module of a third modification is used in the Fig. 8 (b) and Fig. 8 (c) described.

[0079] The modification in Fig. 8 (b) is a structure in which only one ultraviolet light LED pack 10 of the waterproof ultraviolet light emission module is attached to the mounting substrate 20.

[0080] The modification of Fig.8 (c) is a structure in which three ultraviolet light LED packs 10 of the waterproof ultraviolet light emission module are attached to the mounting substrate 20.

[0081] It should be noted that four or more ultraviolet LED light packs 10 can also be attached to the mounting substrate 20.

[0082] Furthermore, the lens body 41 of the lens 40 is not limited to a structure in which a lens body 41 is arranged for an ultraviolet light LED pack 10, and the lens body 41 can be arranged to cover a plurality of ultraviolet light LED packs 10. <<Vierte Modifikation> >

[0083] A waterproof ultraviolet light emission module of a fourth modification is now described.

[0084] In the embodiment described above, the shape of the lens body is not limited to a hemispherical shape, although a hemispherical shape is illustrated as the shape of the lens body 41 of the lens 40, and a desired shape can be designed to obtain a desired light distribution pattern of the ultraviolet light. For example, the lens 40 can be shaped to have a convex and concave form to implement a narrow-angle or wide-angle light distribution. <<Industrielle Anwendbarkeit> >

[0085] The waterproof ultraviolet light emission module of the present embodiment and its modifications can be used in an ultraviolet light sterilization device configured to irradiate a part to which mold, bacteria, viruses, and so on adhere with ultraviolet light and sterilize the part. For example, the waterproof ultraviolet light emission module can be incorporated into an automotive air conditioner, a humidifier, a rice cooker, a microwave oven, a dishwasher, an electric boiler, a refrigerator / freezer, a sterilization chamber, a facial treatment device, an indoor / outdoor ultraviolet irradiation device, and so on.

[0086] The waterproof ultraviolet light emission module is used as an ultraviolet light source module mounted in a fluid sterilization device, such as for water and gas. For example, the waterproof ultraviolet light emission module can be used as an ultraviolet light source module configured to irradiate and sterilize water stored in an ice machine's storage tank, water in a water pipe or water heater, drinking water from a water dispenser, cooling water from a circulation device (refrigerator), beverages in a beverage dispenser, and so on. REFERENCE MARK LIST 1 Ultraviolet light emission module 10. Source of ultraviolet light (ultraviolet LED light pack) 11 The or component 12 Packing substrate 13 Sealing element 20 Mounting substrate 21 Perimeter edge 30 metal housings 31st rib 33 screw holes 40 lens 41 Lens body 42 Flange part 43 edge section 44th level 50 Coverage 51 Through hole 60 fastening element 61 hooks 70 thermally conductive surface elements 80 Filling element 90 Service supply line QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2018-148938A

[0006] JP 2022-113426A

[0006] JP 2022-125391A

[0006]

Claims

[1] Waterproof ultraviolet light emission module comprising an ultraviolet light source, a mounting substrate, a housing, a lens, a cover and a mounting element, wherein The source of ultraviolet light is an LED pack configured to contain an LED die emitting ultraviolet light within a pack. wherein the mounting substrate has wiring configured to accommodate the ultraviolet light source and arranged on the housing, the housing has a plate shape that allows the mounting substrate to be attached to it, wherein the lens is formed from a material which allows ultraviolet light to pass through it, and wherein it has a lens body and a flange part, wherein the lens body has a dome shape and is arranged to cover the source of ultraviolet light, with a space arranged between them, and wherein the flange part is provided to be integrated with a circumferential edge part of the lens body, the cover covers the flange part of the lens, wherein the fastening element presses the cover against the housing in such a way that the cover is fixed to the housing in a state in which the flange part of the lens is positioned between the cover and the housing, wherein the housing has a convex rib which is provided on a part thereof in contact with the flange part of the lens, wherein the convex rib is formed along a circumferential edge of the mounting substrate, and wherein a part of the underside of the flange part of the lens which is in contact with the rib is deformed by being pressed against the rib by the cover, so that the space in the lens is sealed. [2] Waterproof ultraviolet light emission module according to claim 1, wherein a material forming the lens is plastic. [3] Waterproof ultraviolet light emission module according to claim 1, wherein the circumferential edge of the mounting substrate is arranged outside an inner circumferential edge portion of the lens body, wherein the inner circumferential edge portion is in contact with the space and is arranged inside the rib of the housing. [4] Waterproof ultraviolet light emission module according to claim 3, wherein the underside of the flange part of the lens has a step at the circumferential edge of the mounting substrate, wherein a region of the underside of the flange part of the lens, which is arranged within the step, is in contact with a top side of the mounting substrate, and wherein a region of the underside of the flange part of the lens, which is located outside the step, is in contact with a top side of the mounting substrate. [5] Waterproof ultraviolet light emission module according to claim 1, wherein a thermally conductive surface element with insulating properties is arranged between a bottom side of the mounting substrate and the housing. [6] Waterproof ultraviolet light emission module according to claim 1, wherein the fastening element is a screw. [7] Waterproof ultraviolet light emission module according to claim 2, wherein The ultraviolet light source comprises a substrate configured to allow the LED die to be mounted on it, and a sealing element that is transparent to the ultraviolet light, the sealing element being configured to cover a space in which the LED die is arranged on the mounting substrate, and where the sealing element is glass. [8] Waterproof ultraviolet light emission module according to claim 5, which further comprises a power supply line and a filling element, wherein the housing and the thermally conductive surface element have a first through-hole and a second through-hole, which are shaped such that they each pass through the housing and the thermally conductive surface element in a thickness direction, wherein the first through-hole and the second through-hole are provided at positions that correspond to each other, wherein the power supply line passes through the first through-hole and the second through-hole, wherein one end of the power supply line is connected to the wiring of the mounting substrate, and wherein the other end of the power supply line is led out to an outside of the housing, and the first through-hole in the housing is filled with the filling element in such a way that the housing is made waterproof. [9] Waterproof ultraviolet light emission module according to claim 3, wherein two or more sources of ultraviolet light are attached to the mounting substrate with a gap between them, and wherein the rib of the housing and the flange part of the lens are provided along the circumferential edge of the mounting substrate, configured for the two or more sources of ultraviolet light to be mounted thereon. [10] Waterproof ultraviolet light emission module according to claim 1, wherein the housing is made of a metal or of a plastic containing a metal filler.

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