lamp

Abstract

This invention provides a lamp for an aircraft landing guidance flashing device that allows for heat dissipation of the LED module. [Solution] The housing 14 of the lamp 20 for the aircraft landing guidance flashing device has an opening on the front and a through hole on the back, and contains an LED module 11 and a light distribution means 13a inside, a light-transmitting cover 15 is placed in the opening, and a power connector 14a is placed in the through hole to connect to a cable that supplies power to the LED module 11, the power connector 14a is connected to the LED module 11 by a plurality of wires 19 inside the housing 14, the LED module 11 has a plurality of LEDs and an LED board, the light distribution means 13a is placed on the light-emitting side of the LED module 11, and the housing 14 includes legs and arms.

Description

Technical Field

[0005]

[0001] The present invention relates to a lamp.

Background Art

[0002] Conventionally, at airports and the like, a flash device using a xenon lamp has been used to guide landing aircraft onto the runway (Non-Patent Document 1).

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] If the aforementioned xenon lamp is replaced with a light-emitting diode (LED) lamp, it is possible to significantly extend the lifespan and reduce power consumption. However, when using the LED lamp, heat dissipation of the LED module mounted on the LED lamp is required.

[0005] To promote heat dissipation from the LED module, it is conceivable to install heat dissipation fins inside the LED lamp. However, there is a standard that the total weight of the flashing lamps used in the flashing device must be 5.5 kg or less (Non-Patent Literature 1). For this reason, increasing the weight by installing heat dissipation fins or the like is undesirable.

[0006] Therefore, the present invention aims to provide a lamp for an aircraft landing guidance flashing device that can suppress weight increase and dissipate heat from the LED module. [Means for solving the problem]

[0007] To achieve the above objective, the lamp of the present invention comprises a housing, a light-transmitting cover, a light distribution means, an LED module which is a light source, a heat transfer means, and a heat spreader. The housing has an opening, and the light-transmitting cover is placed in the opening. The light distribution means and the LED module are arranged inside the housing. The light distribution means is arranged on the light irradiation side of the LED module. The LED module is positioned on the light-transmitting cover side of the heat spreader. The heat transfer means is arranged to dissipate the heat from the LED module to the housing. The heat transfer means is characterized in that one end is thermally connected to the LED module and the other end is thermally connected to the housing. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a lamp that can suppress weight increase and dissipate heat from the LED module. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a cross-sectional view showing an example of the configuration of the lamp in Embodiment 1. [Figure 2] Figure 2 is a cross-sectional view showing an example of another configuration of the lamp according to Embodiment 1. [Figure 3] Figure 3 is a cross-sectional view showing an example of the configuration of the lamp in Embodiment 2. [Figure 4] Figure 4 is a perspective view showing an example of the installation of the lamp in Embodiment 1. [Figure 5] Figure 5 is a perspective view showing another example of the lamp installation according to Embodiment 1. [Modes for carrying out the invention]

[0010] In the lamp of the present invention, for example, the heat transfer means has a heat conduction part and a heat dissipation part, The heat conduction section is arranged so that heat from the LED module is conducted to it. The heat dissipation section is positioned within the housing to dissipate heat from the LED module.

[0011] In the lamp of the present invention, for example, the heat dissipation portion is formed at one end of the heat transfer means, The other end of the heat transfer means is thermally connected to the LED module.

[0012] In the lamp of the present invention, for example, the heat dissipation section is thermally connected to the housing.

[0013] In the lamp of the present invention, for example, the heat transfer means includes a heat pipe.

[0014] The lamp of the present invention further includes, for example, a heat spreader. The heat spreader is positioned on the opposite side of the mounting surface of the LED substrate. The heat transfer means is thermally connected to the heat spreader.

[0015] In the lamp of the present invention, for example, the space enclosed within the housing by the LED module, the housing, and the heat transfer means is a wiring housing section that accommodates the wiring connected to the LED module.

[0016] In the lamp of the present invention, for example, the housing has a connection portion that can be connected to wiring outside the lamp, The wiring housed in the wiring housing portion is connected to the connection portion.

[0017] In the lamp of the present invention, for example, the housing includes a through hole through which wiring can be introduced from outside the housing into the housing.

[0018] In the lamp of the present invention, for example, the light distribution means includes at least one of a reflector and a lens.

[0019] In the lamp of the present invention, for example, the reflector is cylindrical, The LED module is disposed at the light source side opening of the reflector with the mounting surface facing the opening side of the light irradiation side of the reflector.

[0020] The lamp of the present invention is used, for example, in an aircraft landing guidance flashing device.

[0021] Hereinafter, the lamp of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following description. In the following FIGS. 1 to 5, the same parts may be denoted by the same reference numerals and the description thereof may be omitted. In the drawings, for convenience of explanation, the structure of each part may be appropriately simplified and shown, and the dimensional ratios of each part etc. may be different from the actual ones and may be shown schematically.

[0022] [Embodiment 1] This embodiment is an example of a lamp used in an aircraft landing guidance flashing device. Figure 1 shows an example of the configuration of the lamp of this embodiment. As shown in Figure 1, the lamp 10 of this embodiment includes an LED module 11 which is a light source, a heat transfer means 12, a light distribution means 13a, a housing 14 having an opening, and a light-transmitting cover 15. Although not shown, the LED module 11 includes a plurality of LEDs and an LED substrate having a mounting surface (the left side in Figure 1) on which the plurality of LEDs are mounted. As shown in Figure 1, the LED module 11 is positioned away from the housing 14. The heat transfer means 12 is positioned on the opposite side of the mounting surface from the LED substrate (to the right of the LED module 11 in Figure 1), with one end thermally connected to the LED module 11 and the other end thermally connected to the housing 14. Thus, the heat transfer means 12 is positioned to dissipate the heat from the LED module 11 to the housing 14. The reflector 13a, which is a light distribution means, is located on the light-emitting side of the LED module 11 (the left side where the mounting surface is located in Figure 1). The LED module 11, the heat transfer means 12, and the reflector 13a are located inside the housing 14. The light-transmitting cover 15 is located in the opening of the housing 14.

[0023] The LED module 11 only needs to have multiple LEDs mounted on the mounting surface of the LED substrate so that it has a brightness comparable to that of a conventional xenon lamp for aircraft landing guidance flashing devices, and the size and material of the LED substrate, the number of LEDs, etc., are not particularly limited. In the lamp 10 of this embodiment, the LED module 11 is positioned away from the housing 14 by a heat transfer means 12, but the LED module 11 only needs to be positioned so that it does not directly contact the housing 14. The LED module 11 may be positioned away from the housing 14 by, for example, a separating member. In the lamp 10 of this embodiment, the LED module 11 is positioned with its mounting surface facing the light-emitting side opening of the reflector 13a, but the positional relationship between the LED module 11 and the reflector 13a is not limited to this, and the reflector 13a only needs to be positioned on the light-emitting side of the LED module 11.

[0024] In the lamp 10 of this embodiment, the heat transfer means 12 is a heat pipe, but the heat transfer means 12 only needs to be capable of transferring heat, and known heat transfer means can be used. Specific examples of the heat transfer means 12 include, for example, a member formed of a heat-conducting material (heat-conducting member), a heat pipe, or a combination thereof. The heat-conducting material is not particularly limited, and known heat-conducting materials can be used, with specific examples including metals, ceramics, composite materials of ceramics and metals, diamond, etc. Examples of the metals include aluminum and its alloys, magnesium and its alloys, iron and its alloys, copper and its alloys, titanium and its alloys, molybdenum and its alloys, tungsten and its alloys, etc. The heat pipe is not particularly limited, for example, a self-excited oscillating heat pipe, and commercially available products may be used. In the lamp 10 of this embodiment, there are two heat transfer means 12, but the number of heat transfer means 12 is not particularly limited, and there may be one or two or more.

[0025] The heat transfer means 12 only needs to be positioned to dissipate the heat from the LED module 11 to the housing 14. For example, as shown in Figure 1, one end of the heat transfer means 12 may be thermally connected to the LED module 11, and the other end of the heat transfer means 12 may be thermally connected to the housing 14. In the lamp 10 of this embodiment, one end of the heat transfer means 12 is in direct contact with the LED module 11, but it may also be indirectly connected. In the latter case, for example, a heat diffusion member is interposed between the LED module 11 and the heat transfer means 12, and the heat diffusion member is thermally connected to both the LED module 11 and the heat transfer means 12. The heat diffusion member may be, for example, an integrated heat spreader made of the aforementioned heat conductive material.

[0026] In the lamp 10 of this embodiment, the light distribution means is a reflector 13a, but the light distribution means can be any means capable of sending the light emitted by the LED module 11 to the light-transmitting cover 15 side by means of reflection, focusing, diffusion, etc. The light distribution means may be a reflector, as in the lamp 10 shown in Figure 1, or a lens 13b, as shown in Figure 2. Furthermore, the lamp of the present invention may use both a reflector and a lens as the light distribution means.

[0027] Examples of materials for forming the reflector 13a include metals such as aluminum and its alloys, magnesium and its alloys; resins such as PC and PBT; and so on. As for the reflector 13a, a reflector with improved reflection efficiency may be used, for example, by applying a high-reflectivity process such as plating or coating of a high-reflectivity paint to the reflective surface. For example, in the lamp 10, the reflector 13a may be cylindrical as shown in Figure 1, and the LED module 11 may be positioned such that the mounting surface of the LED module 11 faces the inside of the cylinder of the reflector 13a, i.e., the light-emitting opening side of the reflector 13a, at one opening (light source side opening) of the reflector 13a (the right side in Figure 1). Figure 1 illustrates a cylindrical reflector 13a (for example, umbrella-shaped) in which the area of ​​one opening is narrower than the area of ​​the other opening, but the two opening areas of the reflector 13a may be the same. The cross-sectional shape of the reflector 13a may be an arc shape as illustrated in Figure 1, or it may be a straight line. The reflector 13a may be positioned on the light-emitting side of the LED module 11 by means of a support member or the like.

[0028] Examples of materials for forming the housing 14 include aluminum and resin. The housing 14 may be formed as a single unit or it may be formed from multiple components. In the latter case, the housing 14 may include, for example, a cylindrical component and a disc-shaped component, and the disc-shaped component may be placed in an opening in the cylindrical component on the side opposite to the side where the light-transmitting cover 15 is placed.

[0029] Any material can be used to form the light-transmitting cover 15, as long as it can transmit most of the light emitted from the LED module 11, such as glass.

[0030] In the lamp 10 of this embodiment, the heat transfer means 12 is positioned to dissipate the heat from the LED module 11 to the housing 14, so that the heat from the LED module 11 can be dissipated to the housing 14 without using a cooling fan or the like. Therefore, the lamp 10 of this embodiment can suppress the weight increase that would be caused by the installation of a cooling fan or the like. Furthermore, in the lamp 10 of this embodiment, there is no need to use a fan or the like, which may be prone to failure, to conduct heat within the housing 14, so for example, maintenance of the housing 14 is not required for a period of about 20 to 30 years, which is the lifespan of the LED.

[0031] In this embodiment, the lamp 10 may have a heat transfer means 12 which includes a heat conduction section and a heat dissipation section. In this case, it is preferable that the heat conduction section is arranged to conduct heat from the LED module 11, and the heat dissipation section is arranged to dissipate heat from the LED module to the housing 14. Specifically, the heat conduction section is thermally connected to the LED module 11. The heat dissipation section is thermally connected to the housing 14, for example. The heat conduction section and the heat dissipation section are, for example, thermally connected, and more specifically, are integrally formed. The heat conduction section may be any material that can conduct heat from the LED module 11 to the heat dissipation section, for example, a heat pipe. The heat dissipation section may be any material that can dissipate the heat conducted by the heat conduction section to the housing 14, for example, a heat conduction member.

[0032] If the heat transfer means 12 has a heat conduction section and a heat dissipation section, the positions of the heat conduction section and the heat dissipation section in the heat transfer means 12 are not particularly limited. The heat dissipation section is formed, for example, at one end of the heat transfer means 12. In this case, the region from the other end of the heat transfer means 12 to the heat dissipation section can also be referred to as the heat conduction section. Furthermore, it is preferable that the other end of the heat transfer means 12 is thermally connected to the LED module 11.

[0033] Thus, because the heat transfer means 12 has the heat conduction part and the heat dissipation part, heat from the LED module 11 can be efficiently transferred, for example, from the heat conduction part to the heat dissipation part, and further from the heat dissipation part to the housing 14, thereby further improving heat dissipation efficiency. In addition, when the heat transfer means 12 has the heat conduction part and the heat dissipation part, the heat dissipation efficiency can be optimally adjusted according to the amount of heat generated by the LED module 11 by adjusting the contact area between the heat dissipation part and the housing 14, thereby further suppressing weight increase.

[0034] The lamp 10 of this embodiment may further include, for example, a heat spreader. In this case, it is preferable that the heat spreader is positioned on the opposite side of the mounting surface from the LED substrate, and that the heat transfer means 12 is thermally connected to the heat spreader. The heat spreader may be, for example, a commercially available product. The heat spreader may be formed integrally with the heat transfer means 12. In this case, the heat spreader can also be considered the heat absorption part of the heat transfer means 12. By having the heat spreader in this way, for example, the heat of the LED module 11 can be efficiently absorbed and dispersed, and efficiently conducted to the heat transfer means 12, thereby further improving the heat dissipation efficiency.

[0035] In this embodiment, the lamp 10 may have a wiring housing section within the housing, where the space enclosed by the LED module 11, the housing 14, and the heat transfer means 12 accommodates the wiring connected to the LED module 11. The wiring housed in the wiring housing section may include, for example, the wiring that supplies power to the LED module 11. The wiring housing section may house all or part of the wiring within the lamp 10. In the case of a single wire, for example, all or part of it may be housed in the wiring housing section. The number of wires is not particularly limited and can be appropriately set according to, for example, the amount of power used by the LED module 11, and may be one or two or more. If the lamp 10 has a heat spreader, the space enclosed by the heat spreader, the housing 14, and the heat transfer means 12 may be used as the wiring housing section. By having the wiring housing section in this way, for example, the wiring within the lamp 10 can be consolidated in one place, thus reducing the space required for wiring. Therefore, for example, the size of the housing 14 can be reduced, thus further suppressing the increase in weight.

[0036] Furthermore, in the lamp 10 of this embodiment, for example, the housing 14 may have a connection part that can be connected to wiring outside the lamp 10. In this case, it is preferable that the wiring housed in the wiring housing is connected to the connection part. The connection part is not particularly limited, and for example, a known connector such as a power connector can be used. It is preferable that the connection part be waterproof in order to reduce failures when installed outdoors. It is preferable that the connection part be arranged adjacent to the wiring housing, for example. In this way, by having the connection part, for example, even if a failure occurs when the aircraft landing guidance flashing device is installed and in use, the aircraft landing guidance flashing device can be immediately made usable by replacing the failed lamp 10 with a new lamp 10. For this reason, by having the connection part, maintenance of the aircraft landing guidance flashing device becomes easier.

[0037] In the lamp 10 of this embodiment, for example, the housing 14 includes a through-hole through which wiring can be introduced from outside the housing 14 into the housing 14. The size of the through-hole is sufficient to allow the wiring to be introduced.

[0038] Next, an example of the installation of the lamp 10 of this embodiment will be described using Figures 4 and 5. The lamp 10 of this embodiment may further include, for example, an arm 23 and a leg portion 21, and may be installed on the ground by the leg portion 21. The lamp 10 of this embodiment may also include, for example, a cable (wiring) 22 for supplying power to the LED module 11. Furthermore, the lamp 10 shown in Figure 4 may be installed on a pole 31 installed on the ground, as shown in Figure 5.

[0039] The lamp 10 of this embodiment is configured to flash, for example, 120 times per minute. When the lamp 10 of this embodiment is installed, for example, at a large airport with multiple runways, approximately 8 to 29 lamps are installed at intervals of about 30 meters from the direction of aircraft approach toward the end of the runway. Furthermore, when the lamp 10 of this embodiment is installed, for example, at a small airport with few aircraft takeoffs and landings and only one short runway, two lamps are installed, one on each side in the short direction toward the end of the runway, so that they flash (flash) simultaneously. In addition, when the lamp 10 of this embodiment is installed, for example, at an airport where aircraft cannot approach the runway in a straight line, it is installed at key points along the approach path to the runway, for example, every few kilometers. Furthermore, the lamp 10 of this embodiment is configured so that the brightness can be switched between three levels, for example, in accordance with the standard specifications of the Ministry of Land, Infrastructure, Transport and Tourism. Of these three brightness levels, the brightest "High" setting is used, for example, during the daytime when visibility is poor due to fog, rain, etc. The dimmest "Low" setting is used, for example, at night. The intermediate "Middle" setting is used, for example, in the evening.

[0040] [Embodiment 2] This embodiment is another example of a lamp used in an aircraft landing guidance flashing device. Figure 3 is a cross-sectional view showing an example of the configuration of the lamp of this embodiment. As shown in Figure 3, the lamp 20 of this embodiment has, in addition to the configuration of the lamp 10 of Embodiment 1, a heat spreader 16, a separation member 17, a support member 18, and wiring 19. In the lamp 20 of this embodiment, the space enclosed by the heat spreader 16, the housing 14, and the heat transfer means 12 is the wiring housing. The LED module 11 is positioned away from the housing 14 by a separation member 17, one end of which is connected to the housing 14 and the other end of which is connected to the heat spreader 16. The LED module 11 is positioned with its mounting surface facing the light-emitting opening side of the reflector 13a on the light source side of the reflector 13a. The heat transfer means 12 includes an integrally formed heat conduction section 12a and a heat dissipation section 12b. The heat conduction section 12a is thermally connected to the heat spreader 16 at the end opposite to the heat dissipation section 12b, and the heat dissipation section 12b is thermally connected to the housing 14. As a result, the heat from the LED module 11 is dissipated to the housing 14 via the heat spreader 16, the heat conduction section 12a, and the heat dissipation section 12b. Furthermore, the reflector 13a is not connected to the LED module 11 at the end facing the LED module 11, but is instead supported by a support member 18, one end of which is connected to the housing 14 and the other end of which is connected to the reflector 13a. The housing 14 has a power connector 14a, which is a connection section, adjacent to the wiring housing section. The heat spreader 16 is positioned on the opposite side of the mounting surface of the LED substrate of the LED module 11 and is thermally connected to it. The wiring 19 is connected from the connection part 14a of the housing 14 to the LED module 11 via the wiring housing. Except for this point, the lamp 20 of this embodiment has the same configuration as the lamp 10 of Embodiment 1, and its description can be applied accordingly.

[0041] Examples of materials for forming the separation member 17 include aluminum and resin. The separation member 17 only needs to be a member that allows the LED module 11 to be positioned directly or indirectly away from the housing 14. Examples of materials for forming the support member 18 include aluminum and resin. The support member 18 only needs to be a member that allows the reflector 13a to be positioned on the light-emitting side of the LED module 11.

[0042] According to the lamp 20 of this embodiment, since it includes a heat spreader 16 and the heat transfer means 12 has a heat conduction section 12a and a heat dissipation section 12b, it is possible to dissipate the heat from the LED module 11 to the housing 14 very efficiently. Furthermore, since the housing 14 has a connection section 14a, the lamp 20 can be easily replaced, and maintenance of the aircraft landing guidance flashing device is made easier. Moreover, since it has the wiring housing section, for example, the wiring 19 inside the lamp 20 can be consolidated in one place, so the space required for wiring can be reduced, the size of the housing 14 can be reduced, and thus the increase in weight can be further suppressed. For this reason, the lamp 20 of this embodiment can be more suitably used as a lamp for use in an aircraft landing guidance flashing device.

[0043] Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments. Various modifications to the configuration and details of the present invention can be made that will be understood by those skilled in the art within the scope of the present invention.

[0044] <Note> Some or all of the above embodiments and examples may be described as follows, but are not limited to the following. (Note 1) The LED module is the light source, Heat transfer means, Light distribution means, A housing having an opening, Includes a light-transmitting cover, The LED module includes a plurality of LEDs and an LED substrate having a mounting surface on which the plurality of LEDs are mounted. The light distribution means is arranged on the light irradiation side of the LED module. The LED module and the light distribution means are arranged inside the housing. The light-transmitting cover is placed in the opening of the housing, The LED module is positioned within the housing, but separate from the housing. The lamp is characterized in that the heat transfer means is arranged to dissipate the heat from the LED module to the housing. (Note 2) The heat transfer means has a heat conduction section and a heat dissipation section, The heat conduction section is arranged so that heat from the LED module is conducted to it. The heat dissipation section is arranged in the housing to dissipate heat from the LED module, as described in Appendix 1. (Note 3) The heat dissipation section is formed at one end of the heat transfer means, The other end of the heat transfer means is thermally connected to the LED joule, as described in Appendix 2. (Note 4) The heat dissipation section is a lamp as described in Appendix 2 or 3, which is thermally connected to the housing. (Note 5) The heat transfer means is a lamp as described in any one of appendices 1 to 4, including a heat pipe. (Note 6) Furthermore, it has a heat spreader, The heat spreader is positioned on the opposite side of the mounting surface of the LED substrate. The heat transfer means is a lamp according to any one of the appendices 1 to 5, which is thermally connected to the heat spreader. (Note 7) The lamp according to any one of the appendices 1 to 6, wherein the space enclosed within the housing by the LED module, the housing, and the heat transfer means is a wiring housing section for housing wiring connected to the LED module. (Note 8) The housing has a connection part that can be connected to wiring outside the lamp, The wiring housed in the aforementioned wiring housing is connected to the aforementioned connection part, and is the lamp described in Appendix 7. (Note 9) The lamp according to any one of the appendices 1 to 8, wherein the housing includes a through hole through which wiring can be introduced from outside the housing into the housing. (Note 10) The lamp according to any one of appendices 1 to 9, wherein the light distribution means includes at least one of a reflector and a lens. (Note 11) The reflector is cylindrical, The lamp as described in Appendix 10, wherein the LED module is positioned in the light source-side opening of the reflector, with its mounting surface facing the light-emitting side opening of the reflector. (Note 12) A lamp used in an aircraft landing guidance flashing device, as described in any of the appendices 1 to 11.

[0045] This application claims priority based on Japanese Patent Application No. 2017-003940, filed on 13 January 2017, and incorporates all of its disclosures herein. [Industrial applicability]

[0046] According to the present invention, it is possible to provide a lamp that can suppress weight increase and dissipate heat from the LED module. The lamp of the present invention can be used, for example, in applications such as aircraft landing guidance flashing devices. [Explanation of Symbols]

[0047] 10, 20 lamps 11 LED modules 12 Heat transfer means 12a Heat conduction section 12b Heat sink 13a Light distribution means (reflector) 13b Light distribution means (lens) 14 cabinets 14a Connection part (power connector) 15 Light-transmitting cover 16 Heat Spreader 17 Separation member 18 Support Member 19, 22 Wiring 21 Legs 23 Arms 31 Paul

Claims

1. Equipped with a casing, The housing has an opening on the front and a through hole on the back, and includes a reflector, a light source, and a heat transfer means inside. A light-transmitting cover is placed in the opening on the front of the housing, and a power connector connected to the light source by wiring is placed in the through-hole. The reflector has openings on the light source side and the light irradiation side of the light source, and is cylindrical in shape with one opening area being smaller than the other opening area, and is positioned on the light irradiation side of the light source. The LED module, which is the light source, has a plurality of LEDs and an LED substrate on which the plurality of LEDs are mounted, and the mounting surface of the LED module is positioned in the light source-side opening of the reflector toward the light-emitting side opening of the reflector. The heat transfer means is a heat conductive member formed of a heat conductive material, which is thermally connected to the LED substrate and the housing. The flash of light emitted from the LED module is emitted outwards through the light-transmitting cover. A lamp for an aircraft landing guidance flashing device, characterized by the following features.

2. The lamp for an aircraft landing guidance flashing device according to claim 1, wherein the power connector is waterproof.

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