JP2016201317A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire capable of exerting a high light amount by imparting sufficient electric power to an LED and capable of surely discharging heat generating in an LED mounting part.SOLUTION: A luminaire includes: a tabular mounting substrate; a plurality of light-emitting elements mounted on the mounting substrate along a plurality of mounting arrangements; a plurality of refrigerant pipe conduits extending from the inside of the mounting substrate to the outside, and provided along a row direction or a line direction of the plurality of mounting arrangements; and a heat radiation plate through which the plurality of refrigerant pipe conduits penetrate. Each of the plurality of refrigerant pipe conduits has an extension shape which penetrates in a plane direction inside the mounting substrate, protrudes to the outside and then extends, and each of the plurality of extending refrigerant pipe conduits seals the refrigerant inside, and by vaporization and condensation of the refrigerant, the heat generating in the mounting arrangement is transported to the heat radiation plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an illuminating device that solves the heat generation problem of a light emitting element caused by the high light amount while realizing a high light quantity.

  In various outdoor facilities and indoor facilities such as baseball fields, soccer fields, outdoor sports facilities, indoor sports facilities, tunnels, roads, piers, ports, airports, and large indoors, it is necessary to irradiate light with a high light intensity. In such a place, a lighting device having a high light quantity is used. One lighting device has a high light amount and can irradiate strong light in the above-mentioned facility.

  In these facilities, a plurality of lighting devices may be used. For example, in outdoor sports facilities such as a baseball field and a soccer field, a lighting device in which a large number of lighting devices are arranged in a matrix is used as a night game facility. A lighting device including lighting devices arranged in a matrix can illuminate a field such as a baseball field or a soccer field.

  Or these illuminating devices may be comprised with a single light source, and may be comprised with several light source.

  Such an illuminating device is required to have a high amount of light and irradiate light as far as possible with a wide irradiation angle.

  Such an illuminating device (including a case where it is composed of a single light source and a case where it is composed of a plurality of light sources) requires a high amount of light, so that an HID lamp has been conventionally used. The HID lamp can be irradiated with a high amount of light in accordance with the standard, and thus is suitable for a lighting device in the above facilities.

However, HID lamps have shortcomings and have the disadvantage of requiring frequent replacement. In addition, the power consumption is large, and a large amount of power is consumed in a lighting device that requires a large number of lighting devices. In recent years, not only in Japan but also in various countries, there has been a tendency to increase the electricity rate due to rising cost awareness of fossil fuels, headwinds against nuclear power generation, and increased cost of power generation using renewable energy.
In addition to the increase in electricity charges, there is a growing tendency to be concerned about the environmental impact of carbon dioxide gas emissions and energy loss at the stage of generating electricity. Along with heightened environmental awareness, there is a growing awareness of monitoring power generation and reducing power consumption of electronic devices such as lighting devices.

  In response to such a rising trend of power charges and an increase in environmental awareness, there is a need for a lighting device with low power consumption.

  In this situation, an illumination device using an LED (light emitting diode) instead of an HID lamp has been proposed. An LED alone has a low light quantity, but the light quantity as a whole can be increased by intensively arranging a large number of LEDs. For example, by arranging a large number of LEDs in a matrix, a lighting device with a high light quantity can be realized by the LEDs.

  In this way, by arranging a large number of LEDs in a concentrated manner instead of one HID lamp, a lighting device with a high light quantity can be realized. As is generally known, the LED consumes much less power than an HID lamp or the like. For this reason, the illuminating device using many LED has the power consumption smaller than the illuminating device comprised with a HID lamp. In addition, since the product life is long, the running cost of the lighting device (the cost required for the device itself and the cost of the power charge, etc.) can be less than when using an HID lamp or the like.

  As described above, lighting devices using LEDs are gradually proposed.

  Here, in the case of the HID lamp, the heat accompanying the light emission is radiated and discharged in the light irradiation direction. On the other hand, the LED heat generation does not generate much heat in the light irradiation direction, but tends to generate a large amount of heat in the substrate on which the LED is mounted. For this reason, high heat is often generated on a substrate on which a large number of LEDs are mounted. In order to discharge such heat, a technical proposal has been made to incorporate a heat pipe into a lighting fixture using LEDs (see, for example, Patent Document 1 and Patent Document 2).

JP 2011-90976 A JP 2012-155904 A

  Patent Document 1 discloses a light source unit 23 in which a light source 22 is disposed on a substrate 21, and a liquid crystal display panel 24 that is an illuminated member that is disposed on the front side of the light source unit 23 and is illuminated by illumination light from the light source 22. And a case body 27 having a hollow portion 27 a provided between the substrate 21 and the liquid crystal display panel 24 and corresponding to the light source 22, the substrate 21 and the case body 27 are heated. The case body 27 is provided with a heat radiating portion 27d which is formed of a conductive material and has an increased surface area, so that heat generated by the light source 22 is transmitted from the substrate 21 to the case body 27. An illuminating device configured to thermally connect the body 27 by a heat pipe 29 is disclosed.

  Patent Document 1 discloses an illumination device having a liquid crystal screen using LEDs as a backlight light source. Here, the structure which connects the case from a board | substrate with a heat pipe is disclosed while the mounting board | substrate of LED which is a backlight light source, and the case connected to this are comprised with a thermal radiation member.

  However, the illuminating device of Patent Document 1 includes a light emitting part (LED), a heat generating part (substrate), a heat radiating part (case), and a transmission part (heat pipe) inside the casing of the entire illuminating device. When the heat generation is very large, heat is trapped inside the casing. As a result, heat is not released to the outside, and there is a problem that heat generated inside the lighting device cannot be sufficiently discharged to the outside.

  In particular, although a heat pipe is used, the heat pipe has a problem that heat generated by the LED cannot be transported and released outside. As a result, there is a problem that the heat of the LED, which is a heat source, is reliably transported from the LED and discharged at a location separated from the LED.

  Thus, if the heat is not sufficiently discharged from the LED, there is a possibility of causing a failure or malfunction of the LED or the substrate. Alternatively, in order to prevent this, it is necessary to reduce the heat generation by reducing the power supplied to each LED. If the power supply is lowered in this way, the light amount of each LED naturally decreases, and the light amount of the entire lighting device also decreases.

  In addition, lighting devices that require a high amount of light are installed in places that are difficult to repair or replace, such as outdoor sports facilities, indoor sports facilities, airports, ports, roads, and tunnels (high positions, tower tops, etc.). In such a situation, if a part of the LED or the substrate fails, the cost and labor of repair and replacement are large. Also in this respect, the technique of Patent Document 1 has an insufficient heat exhaust function, and as a result, a lighting device having a sufficient amount of light cannot be realized.

  Patent Document 2 is an LED lighting device including an LED structure and an LED radiator that dissipates heat generated in the LED structure, and the LED radiator is a surface opposite to the light emitting surface of the LED structure. The heat radiation stage that is in contact with the heat sink, the comb-shaped heat radiation fin that is placed directly on the heat radiation stage, the heat pipe that conducts heat from the heat radiation stage and extends to the ceiling side, and the heat radiation from the comb-shaped heat radiation fin to the ceiling side to dissipate the heat of the heat pipe Disclosed is an LED lighting device comprising a multilayer heat dissipating fin.

  Patent Document 2 discloses a technique in which a heat radiation stage and a heat radiation fin are provided on the back surface of an LED mounting substrate and these are connected by a heat pipe.

  However, the lighting device of Patent Document 2 causes the same problem as Patent Document 1 in that these structures are further housed in an external casing. In addition, the heat pipe that has received heat from the heat dissipation stage (a rod-shaped heat pipe that extends in the ceiling direction) receives the heat generated by the LED through the heat dissipation stage, so that the thermal resistance increases. The heat generated by the LED cannot be sufficiently transferred. For this reason, the heat pipe cannot sufficiently transfer heat to the radiating fins, and the exhaust heat may be insufficient. In addition, the radiation fin is in the horizontal direction with respect to the LED substrate, and the heat pipe is in the vertical direction with respect to the LED substrate. For this reason, the space | interval of radiation fins becomes parallel to a LED board, and there also exists a problem which is hard to be discharged | emitted so that the thermal convection which arises between radiation fins may distance from an LED board.

  Moreover, although the illuminating device of patent document 2 moves the heat | fever of the thermal radiation stage using a heat pipe, many LED is mounted in the illuminating device using LED. In particular, in an illumination device that increases the amount of light, it is necessary to arrange a large number of LEDs, and each of the large number of LEDs generates heat in the substrate. The heat pipe of Patent Document 2 has a problem that heat from these individual LEDs cannot be transferred.

  As described above, the conventional techniques represented by Patent Documents 1 and 2 have a problem that even a lighting device using LEDs cannot exhibit a sufficient heat exhaust capability. As a result, there is a limit to the power applied to the LED, and there is a problem that a sufficient amount of light for replacement with a conventional HID lamp or the like cannot be secured. In addition, failures and malfunctions are likely to occur, and there is a problem that replacement and repair costs in that case occur.

  In summary, the prior art has the following problems.

  (Problem 1) The individual heats of a plurality of mounted LEDs cannot be reliably transported from the substrate to the outside.

  (Problem 2) The transported heat cannot be discharged sufficiently.

  (Problem 3) Combining Problem 1 and Problem 2, it is difficult to mount many LEDs on the substrate of the lighting device. Alternatively, the power supplied to the individual LEDs cannot be increased. As a result, it is not possible to realize a lighting device with a high light quantity (light quantity) that fully draws out the performance of the LED.

  In view of these problems, an object of the present invention is to provide an illuminating device that can provide a sufficient amount of power to an LED to exhibit a high amount of light and can reliably discharge heat generated in the LED mounting portion.

In order to solve the above problem, the lighting device of the present invention includes a plate-shaped mounting substrate,
A plurality of light emitting elements mounted on the mounting substrate along a plurality of mounting arrays;
A plurality of refrigerant pipes extending along the mounting array column direction or the row direction and extending from the inside of the mounting substrate to the outside,
A heat sink through which a plurality of refrigerant pipes pass,
Each of the plurality of refrigerant conduits has an extending shape that extends after penetrating through the planar direction inside the mounting substrate and protruding outside,
Each of the extending plurality of refrigerant pipes encloses the refrigerant therein, and transports heat generated in the mounting arrangement to the heat radiating plate by vaporization and condensation of the refrigerant.

  In the lighting device of the present invention, a heat pipe is embedded corresponding to each row of LEDs arranged in a matrix on a mounting substrate having a light emitting surface on which a plurality of LEDs are mounted. As a result, each of these heat pipes can reliably transport the heat generated by each LED in each row on the mounting substrate side.

  In addition, each of the plurality of heat pipes matched to the arrangement can discharge the heat transported at a place separated from the mounting board after transporting the heat of the individual LEDs. As a result, the heat generated in the LED and the mounting board can be discharged at a place separated from the mounting board, and the heat in the mounting board and the LED can be prevented from accumulating. As a result, high power can be supplied to each of the LEDs, and a high amount of light can be realized.

  By ensuring the exhaust heat, high power can be applied to the LED. As a result, the lighting device can irradiate light with a higher amount of light. As a result, it can be used in various facilities, and running costs such as power charges can be reduced while reducing repairs and replacements.

It is a perspective view of the illuminating device in embodiment of this invention. It is a front view of the mounting board | substrate of the illuminating device in Embodiment 1 of this invention. It is a schematic diagram which shows the irradiation state of the light from the light emitting element in Embodiment 1 of this invention. It is a front view which shows the state seen from the mounting board | substrate side shown in FIG. 2, FIG. It is a side view of the mounting substrate in Embodiment 1 of this invention. It is a front view of the illuminating device in Embodiment 1 of this invention. It is a side view of the illuminating device in Embodiment 1 of this invention. It is a side view of the illuminating device in Embodiment 2 of this invention. It is a side view from another direction of the illuminating device in Embodiment 2 of this invention. It is a rear view of the illuminating device in Embodiment 2 of this invention. It is a side view of the mounting substrate in Embodiment 2 of this invention.

A lighting device according to a first aspect of the present invention includes a plate-shaped mounting substrate,
A plurality of light emitting elements mounted on the mounting substrate along a plurality of mounting arrays;
A plurality of refrigerant pipes extending along the mounting array column direction or the row direction and extending from the inside of the mounting substrate to the outside,
A heat sink through which a plurality of refrigerant pipes pass,
Each of the plurality of refrigerant conduits has an extending shape that extends after penetrating through the planar direction inside the mounting substrate and protruding outside,
Each of the extending plurality of refrigerant pipes encloses the refrigerant therein, and transports heat generated in the mounting arrangement to the heat radiating plate by vaporization and condensation of the refrigerant.

  With this configuration, the refrigerant conduit is directly embedded in the mounting substrate on which the light emitting element is mounted, and heat transferred from the light emitting element to the mounting substrate can be taken away. The deprived heat is further released to the outside by the heat radiating plate, and the problem of heat transmitted from the light emitting element to the mounting substrate can be solved.

  In the lighting device according to the second aspect of the present invention, in addition to the first aspect, each of the plurality of refrigerant pipes is stored inside the plate-shaped mounting board and penetrates, and outside the mounting board. And an exposed portion that is exposed by stretching, and the storage portion and the exposed portion are connected to form a stretched shape.

With this configuration, the refrigerant pipe can take the heat of the light emitting element inside the mounting substrate, and can release this heat at a place separated from the mounting substrate. As a result, the circulation of the refrigerant in the refrigerant pipe is repeated, and the heat generation problem of the light emitting element can be continuously solved.
In the lighting device according to the third aspect of the present invention, in addition to the second aspect, each of the plurality of refrigerant pipes is separated at the exposed portion, and the first passage extends in the first direction from the mounting substrate. The second passage extends in a second direction that is opposite to the first direction, and the first passage and the second passage are separated from each other.

  In the lighting device according to a fourth aspect of the present invention, in addition to the second aspect, the interior of each of the plurality of refrigerant pipes is a mounting substrate side partition that separates the inside on the mounting substrate side, and an inner side on the heat sink side. A first passage that is a first direction from the mounting substrate side partition to the heat sink side partition, and a first direction from the mounting substrate side partition to the heat sink side partition. A second passage which is a second direction on the side, and the first passage and the second passage are separated.

  With these configurations, the refrigerant pipe can efficiently release the heat generated in the mounting substrate through the heat dissipation plate by moving the heat in the mounting substrate toward the heat dissipation plate side in both directions.

  In the lighting device according to the fifth aspect of the present invention, in addition to the third or fourth aspect, the first passage can enclose a refrigerant therein and circulate the refrigerant inside the first passage. The two passages can enclose the refrigerant inside and circulate the refrigerant inside the second passage.

  With this configuration, each of the refrigerant pipes can circulate the refrigerant in a first direction from the mounting substrate toward the heat sink and a second direction different from the first direction. By the refrigerant circulation in both directions in the first direction and the second direction, the space between the mounting substrate that generates heat and the heat radiating plate that radiates heat can be utilized to the maximum extent.

  In the lighting device according to the sixth invention of the present invention, in addition to the fourth or fifth invention, the first passage vaporizes the refrigerant in the storage portion corresponding to the mounting arrangement, and the vaporized refrigerant thus vaporized is mounted on the mounting substrate. The second passage is vaporized in the storage portion corresponding to the mounting arrangement, the vaporized refrigerant is moved from the mounting substrate side to the heat sink side, and is vaporized in the first passage. The moving direction of the refrigerant is different from the moving direction of the vaporized refrigerant in the second passage.

  With this configuration, each of the plurality of refrigerant pipes divides the heat received by the mounting substrate, which is a heat generating portion, into the first direction and the second direction, which are bidirectional, via the vaporized refrigerant. It can be moved to a certain heat sink. Heat generated in the mounting portion can be reliably transferred to the heat radiating plate by the heat transfer that is started in the separated bidirectional direction.

  In the lighting device according to the seventh invention of the present invention, in addition to the sixth invention, the first passage is an exposed portion, and heat exchange with the heat sink condenses the vaporized refrigerant, and the second passage is The vaporized refrigerant is condensed by heat exchange with the heat radiating plate at the exposed portion.

  With this configuration, the heat dissipation plate cools and condenses the vaporized refrigerant that has moved in each of the first passage and the second passage. Due to this condensation, it is possible to release the heat that has moved in the space divided into the first passage and the second passage.

  In the lighting device according to the eighth aspect of the present invention, in addition to the sixth aspect, the first passage causes the condensed condensed refrigerant to recirculate from the radiator plate side to the mounting substrate side, and the second passage is condensed. The condensed refrigerant is refluxed from the radiator plate side to the mounting substrate side.

  With this configuration, each of the refrigerant pipes can divide the passage connecting the heat generating portion and the heat radiating portion into two while making the best use of the internal space, and move and release the heat in each of the first passage and the second passage. .

  In the lighting device according to the ninth aspect of the present invention, in addition to any one of the third to eighth aspects, each of the plurality of refrigerant pipes is separated in a different direction by the first passage and the second passage. Refrigerant circulation at

  With this configuration, the internal space of the refrigerant pipe can be utilized to the maximum, and heat transfer from the heat generating portion can be divided into two in different directions. By this two division, it is possible to increase the heat release efficiency due to the vaporization and reflux of the refrigerant.

  In the illuminating device according to the tenth aspect of the present invention, in addition to any of the second to ninth aspects, the plurality of refrigerant pipes penetrate the heat radiating plate in the exposed portion.

  With this configuration, the refrigerant pipe and the heat radiating plate can be reliably thermally connected.

  In the illuminating device according to the eleventh aspect of the present invention, in addition to the tenth aspect, the heat sink is substantially perpendicular to the mounting substrate and penetrated by a parallel portion of the exposed portion that is substantially parallel to the mounting substrate. Thus, it is thermally connected to the mounting substrate and indirectly fixed.

  With this configuration, heat exchange between the heat radiating plate and the refrigerant pipe is performed with high efficiency. Further, the fixing force of the heat sink by the refrigerant pipe is increased.

  In the illuminating device according to the twelfth aspect of the present invention, in addition to the eleventh aspect, the heat sink is substantially perpendicular to the mounting substrate and is thermally connected to the mounting substrate by penetration through a parallel portion. And indirectly fixed.

  With this configuration, the refrigerant pipe can transfer the transported heat to the heat radiating plate and fix the heat radiating plate.

  In the illuminating device according to the thirteenth aspect of the present invention, in addition to any of the first to twelfth aspects, the plurality of heat sinks are provided.

  With this configuration, the radiation effect of the radiation plate and the heat release effect by convection are enhanced.

  In the illuminating device according to the fourteenth aspect of the present invention, in addition to any one of the first to thirteenth aspects, the number of refrigerant conduits and the number of columns or rows in the mounting arrangement are the same.

  With this configuration, each of the refrigerant pipes takes heat from the plurality of light emitting elements mounted along the columns or rows. As a result, the heat of the light emitting element mounted on the mounting substrate is surely taken away. In addition, since one refrigerant pipe is used to remove heat from a row of light emitting elements, the capacity of the refrigerant pipe can be determined in accordance with the characteristics and heat generation characteristics of the light emitting elements. For this reason, the specification of a some refrigerant | coolant pipeline can be determined reliably.

  In the lighting device according to the fifteenth aspect of the present invention, in addition to any of the first to fourteenth aspects, each of the plurality of refrigerant conduits is provided along each of a column direction and a row direction in the mounting arrangement. It is done.

  With this configuration, the refrigerant pipes are also provided in a matrix in accordance with the light emitting elements arranged in a matrix. As a result, the refrigerant pipes can take away the individual heat of the light emitting elements arranged in a matrix.

  In the illuminating device according to the sixteenth aspect of the present invention, in addition to any of the first to fifteenth aspects, the mounting substrate is formed of at least one of a metal, an alloy, and a mixture thereof.

  With this configuration, the mounting substrate can mount the light emitting element and increase the thermal conductivity so that heat can be easily transferred to the refrigerant pipe.

  In the illuminating device according to the seventeenth aspect of the present invention, in addition to any of the first to sixteenth aspects, the mounting board has a plurality of through holes in its thickness portion along the column direction or the row direction. The storage portion of the refrigerant pipe is stored in the through hole.

  With this configuration, a part of the refrigerant pipe can be reliably stored in the mounting substrate.

  In the illuminating device according to the eighteenth aspect of the present invention, in addition to the seventeenth aspect, the mounting board includes a protrusion between the rows of light emitting elements along the first direction.

  With this configuration, in the column direction or the row direction of the light emitting elements, heat transfer to the refrigerant pipe can be performed more reliably while suppressing the influence of heat of the adjacent light emitting elements.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  (Embodiment)

  Embodiments will be described.

(Overview)
FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention. The lighting device 1 has various sizes. For example, when the lighting device 1 is provided in an indoor facility, it is not required to be very large. In this case, it is sufficient that the entire lighting device 1 has a size of about several tens of cm square. On the other hand, when the lighting device 1 is used in an outdoor sports facility (for example, when used for night game equipment such as a soccer field or a baseball field), the lighting device 1 is preferably large. For example, the whole may have a size of about 50 cm to 1 m square.

  Thus, the illumination device 1 according to the embodiment only needs to be changed in size in accordance with the site where it is used. However, it is preferably used in the field where high light quantity is required. In particular, the illumination device 1 of the first embodiment is used when it is necessary to irradiate light over a wide range and a long distance with a high light quantity.

  The lighting device 1 includes a mounting substrate 3 on which a plurality of light emitting elements 2 are mounted, a plurality of refrigerant pipes 6, and a plurality of heat radiating plates 7. Furthermore, it is also preferable to include a hood portion 4 that protects the mounting substrate 3 as necessary.

  The mounting substrate 3 mounts the plurality of light emitting elements 2. The light emitting element 2 is preferably an LED. In particular, it is preferable that unpackaged LED chips (hereinafter referred to as “LED bare chips”) are arranged in a matrix on the mounting substrate. Since the LED bare chips are arranged in a matrix, mounting on the mounting substrate 3 is facilitated, and a high amount of light can be generated. The plurality of light emitting elements 2 emit light upon receiving electric power in the mounting substrate 3 and irradiate the target area.

  Here, in the illuminating device 1, since many light emitting elements 2 are arrange | positioned at matrix form, the light emitting elements 2 adjacent in two dimensions can light-emit, overlapping the light emission range. For this reason, compared with the case where an illuminating device is formed with a single light source such as a single HID lamp, it is possible to irradiate with a high amount of light far away while having a wide irradiation angle.

  FIG. 2 is a front view of the mounting board of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 2 shows a state in which only the portion of the mounting substrate 3 in the lighting device 1 is viewed from the front. As shown in FIG. 2, a plurality of light emitting elements 2 are arranged on the mounting substrate 3 so as to have a two-dimensional column and row relationship. Although it is not necessary to be physically exact, they are arranged in a matrix. The light emitting element 2 is preferably an LED bare chip. This is because the adjacent distance between the light emitting elements 2 can be reduced by mounting the bare chip on the mounting substrate 3 and the actual phase density of the plurality of light emitting elements 2 on the light emitting surface 21 can be increased.

  The range in which the light emitting elements 2 are arranged on the mounting substrate 3 is the light emitting surface 21. The plurality of light emitting elements 2 are intensively mounted on the light emitting surface 21.

  FIG. 3 is a schematic diagram showing an irradiation state of light from the light emitting element according to Embodiment 1 of the present invention. FIG. 3 shows a state in which the mounting substrate 3 on which the light emitting element 2 is mounted is viewed from the side. The broken lines in FIG. 3 indicate the irradiation state of light from each of the light emitting elements 2. A plurality of light emitting elements 2 are arranged in a matrix in two dimensions in proximity to each other. Each of the plurality of light emitting elements 2 emits light at an irradiation angle corresponding to the characteristics of the light emitting element 2. Since a certain light emitting element 2 is close to the adjacent light emitting element 2, the light irradiation from the adjacent light emitting element 2 and the light irradiation from the certain light emitting element 2 overlap at a certain part. In FIG. 2, the overlapping part is the overlapping part in the range of the broken line.

  This overlapping portion occurs in each of the adjacent portions also in the row direction in the column direction of the plurality of light emitting elements 2. Due to the two-dimensional overlap of light, the lighting device 1 can sufficiently irradiate a far distance with a high light quantity.

  FIG. 4 is a front view showing a state viewed from the mounting substrate side shown in FIGS. 2 and 3. FIG. 4 shows a front view of the mounting board in a state where the hood portion 4 is provided. Further, a front cover 8 for converging or diffusing light from the light emitting element 2 may be provided on the front surface of the hood portion 4.

  In summary, the illuminating device 1 can irradiate light that reaches a wide irradiation angle and far away with a high amount of light with the characteristics of the following configuration.

  (Feature 1) A plurality of (many) light emitting elements 2 are arranged in a two-dimensional matrix.

  (Feature 2) Each of the light emitting elements 2 is mounted with higher density by bare chip LEDs or the like.

  (Characteristic 3) High power is applied to each of the light emitting elements 2 corresponding to the characteristics of the light emitting elements 2. By this provision, the light emission amount of each light emitting element 2 is increased.

  The mounting substrate 3 mounts a plurality of (many) light emitting elements 2 in this way. Here, a light emitting element using a semiconductor element such as an LED tends to generate a large amount of heat on the mounting surface. The plurality of light emitting elements 2 are mounted on the mounting surface (the hood portion 4 side) of the mounting substrate 3. For this reason, high heat from the plurality of light emitting elements 2 is applied to the mounting surface of the mounting substrate 3. The mounting substrate 3 receives high heat from the light emitting element 2 as this heat.

  Moreover, in order that the illuminating device 1 may obtain high light quantity, it is suitable to give high electric power to each light emitting element 2 like the said characteristic 3. FIG. This is because each of the light emitting elements 2 to which high power is applied generates high light emission. If each of the plurality of light emitting elements 2 generates high light emission, the illumination device 1 can irradiate light with a high amount of light in combination with the overlap shown in FIG.

  However, the heat transferred to the mounting substrate 3 by the light emitting element 2 increases as the number of real phases of the light emitting element 2 increases and the power applied to the light emitting element 2 increases. That is, when irradiation with a higher light amount is required, there is a problem that heat transferred from the light emitting element 2 to the mounting substrate 3 in the lighting device 1 increases.

  If the mounting substrate 3 has high heat, the light emitting element 2 may approach the junction temperature, causing the light emitting element to malfunction or break down, or the lighting device 1 as a whole to malfunction or shorten its life. is there. For example, the lighting device 1 may be used in a sports facility or a public facility. In this case, the lighting device 1 is easily installed at a high place. For this reason, even if a failure occurs in the lighting device 1 or a failure occurs in a part of the light emitting element 2, repair or replacement is difficult. Thus, it is necessary to minimize problems and failures of the lighting device 1 due to the heat of the light emitting element 2.

  The refrigerant pipe 6 and the heat radiating plate 7 release heat transferred to the mounting substrate 3 by the light emitting element 2 to the outside. This heat release can solve the above-mentioned problems caused by heat. The lighting device 1 according to Embodiment 1 solves the problem of heat, which is a hindrance factor when realizing a high amount of light.

FIG. 5 is a side view of the mounting substrate according to Embodiment 1 of the present invention. The mounting substrate 3 includes a through hole 31 therein. The through holes 31 are provided in the mounting substrate 3 along the mounting arrangement of the plurality of light emitting elements 2 to be mounted. Here, the light emitting element 2 has a two-dimensional matrix arrangement along columns and rows. The through holes 31 are provided along this row, for example. That is, in the mounting arrangement of the plurality of light emitting elements 2, the through holes 31 are provided along this row. As a result, the number of columns in the mounting arrangement of the light emitting elements 2 and the number of through holes 31 are the same.
Of course, the number of the through holes 31 and the rows may be different. What is different is that the number of rows and the number of refrigerant pipes 6 may be different.

  The storage portion 61 of the refrigerant pipe 6 may not be a manufacturing process embedded in the through hole 31 provided inside the mounting substrate 3. A part of the mounting substrate 3 has a row dug in a U-shape that matches a part of the outer shape of the refrigerant pipe 6, and another plate material paired therewith is combined, so that the refrigerant A space in which the pipe 6 can be stored may be formed. In this case, the refrigerant pipe 6 is fitted in the U-shaped portion of the mounting substrate 3 and then covered with another plate material, so that the refrigerant pipe 6 is stored in the storage portion 61. Is done.

In addition, the storage portion 61 may be embedded inside or part of the mounting substrate 3, but the refrigerant pipe 6 is formed by fitting a through hole or a U-shaped groove on a plate material different from the mounting substrate 3. May be embedded.
In any structure, a part of the refrigerant pipe 6 can receive heat from the mounting substrate 3 as the storage portion 61.

  Each of the plurality of refrigerant pipes 6 is stored in each of the through holes 31. Each of the refrigerant pipes 6 is stored in the through-hole 31 so as to extend through the planar direction inside the mounting substrate 3 and project outside. FIG. 1 shows a state in which the mounting substrate 3 extends through the plane direction inside the mounting substrate 3 and protrudes to the outside. That is, the refrigerant pipe 6 has a stretched shape as a whole, and a part thereof is stored in the mounting substrate 3. In addition, when this extending | stretching shape is further connected, each of the some refrigerant | coolant pipe line 6 may have the surrounding shape to circulate.

  When stored in the mounting substrate 3, the refrigerant pipe 6 has a stretched shape (or a circular shape), because it is aligned with the through holes 31 along the mounting arrangement of the light emitting elements 2. It can be adjusted to 2 mounting arrays. In other words, each of the refrigerant pipelines 6 has a number corresponding to the number of columns in the mounting arrangement of the light emitting elements 2. Furthermore, it is stored in the mounting substrate 3 in accordance with the position of the column in the mounting array. Of course, in the part which has come out of the mounting substrate 3, it does not need to correspond with the position of the row | line | column of the light emitting element 2. FIG.

  FIG. 6 is a front view of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 6 schematically shows a state in which the lighting device 1 is viewed from the front, and a state in which the elongated refrigerant pipe 6 is stored inside the mounting substrate 3 and a state in which it extends to the outside.

  A part of the refrigerant pipe 6 is stored inside the mounting substrate 3. In storing, as described with reference to FIG. 5, it is stored in the through hole 31 provided in the thickness direction of the mounting substrate 3. The portion stored inside the mounting substrate 3 is a storage portion 61 in the refrigerant conduit 6, and the portion protruding outside the mounting substrate 3 is an exposed portion 62 in the refrigerant conduit 6. The exposed portion 62 is extended and exposed to the outside of the mounting substrate 3. Furthermore, the exposed portion 62 is continuous outside as shown in FIG. As a result of this continuation, each of the refrigerant pipelines 6 has an elongated shape. This extended shape is formed by connecting the storage portion 61 and the exposed portion 62.

  As described above, a part of the mounting substrate 3 is stored in the mounting substrate 3, and the refrigerant pipe 6 having an elongated shape along the mounting arrangement of the light emitting devices 2 is provided, whereby the heat that the light emitting device 2 applies to the mounting substrate 3. Can be released to the outside. Each of the plurality of refrigerant pipes 6 encloses a refrigerant therein. By the vaporization and condensation of the encapsulated refrigerant, heat from the light emitting elements 2 transmitted to the mounting substrate 3 can be released to the outside along the rows of the mounting arrangement.

  Each of the plurality of refrigerant pipes 6 is separated into a first passage and a second passage, as will be described later. The reciprocating motion of the movement of the vaporized refrigerant and the reflux of the condensed refrigerant occurs in each of the first passage and the second passage. The refrigerant pipe 6 is separated into a first path in the first direction and a second path in the second direction, which is the opposite direction, so that in the refrigerant pipe 6, heat in two spaces is bidirectional. Movement can occur.

  With each of the two-way heat transfer, the heat transfer from the heat generating portion (mounting board 3) to the heat radiating portion (heat radiating plate 7) is only in the direction from the heat generating portion to the heat radiating portion, and the heat is taken away and moved. The heat dissipation process can be completed in each of the first passage and the second passage.

  When the refrigerant pipe 6 as a whole having a stretched shape has a circular shape and the entire refrigerant is configured to make one round, the following problems occur. First, the vaporized refrigerant vaporized in the heat generating portion reaches the heat radiating portion like a one-way inside the refrigerant pipe 6. The refrigerant cooled and condensed by the heat radiating portion (heat radiating plate 7) needs to circulate along the same one-way and return to the electronic substrate 3 side which is the heat generating portion, but the capillary phenomenon for returning is insufficient. Reflux is insufficient. Conversely, on the side where the vaporized refrigerant moves, only the vaporized refrigerant passage is provided, so that the vaporized refrigerant does not move sufficiently.

  That is, in such a configuration, one of the refrigerant pipe 6 from the heat generating portion to the heat radiating portion is only the movement of the vaporized refrigerant, and the other is only the reflux of the condensed refrigerant. As a result, half of the refrigerant pipe 6 becomes only a passage, and the other half becomes only a capillary tube, and the movement of the vaporized refrigerant and the reflux of the condensed refrigerant cannot be performed efficiently. The vaporized refrigerant is insufficiently moved only by the hollow passage, and the condensed refrigerant is insufficiently recirculated by the capillary passage having a size filling the inner diameter of the refrigerant pipe 6.

  In addition, if the refrigerant only moves through the circular refrigerant passage 6 in one way, the amount of heat that can be taken away by the heat generating portion is only the amount that matches the one way, and the amount of heat that can be released by moving the refrigerant once is reduced. Get smaller.

  On the other hand, the vaporized refrigerant and the condensed refrigerant are opposed to each other by being divided into a first path in the first direction and a second path in the second direction opposite to the first direction as will be described later. Move and reflux. By this operation, the vaporized refrigerant can be moved and the condensed refrigerant can be recirculated reliably and efficiently.

  In addition, since the refrigerant pipe 6 is divided into two parts, the amount of heat that can be taken away by the mounting board 3 that is a heat generating part is also in two directions, which is larger than in the case of one-way traffic. In combination with this point, the efficiency of releasing the heat of the heat generation portion by the refrigerant pipe 6 to the outside is increased.

  At this time, each of the plurality of refrigerant pipes 6 penetrates the heat radiating plate 7 in the external exposed portion 62. That is, the exposed portion 62 is in thermal contact with the heat sink 7. By this thermal contact, the heat in the mounting substrate 3 transported by the refrigerant pipeline 6 can be released to the outside. This heat release can solve the problem of heat transferred from the light emitting element 2 mounted according to the features 1 to 3 to the mounting substrate 3.

  By eliminating this thermal problem, it is possible to mount the light emitting element 2 in the features 1 to 3, and the illumination device 1 can sufficiently irradiate far away with a high light quantity.

(Explanation of heat treatment operation)
The operation of the heat treatment in the lighting device 1 will be described with reference to FIG. FIG. 7 is a side view of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 7 shows a state in which the lighting device 1 is viewed from the side, and one refrigerant pipe 6 is made to stand out. The actual lighting device 1 has a number of refrigerant pipes 6 along the rows of the mounting arrangement of the light emitting elements 2. However, for convenience of explanation, FIG. 7 shows one refrigerant pipe 6 in a prominent manner. ing.

  The mounting substrate 3 has a plurality of light emitting elements 2 mounted thereon. The light emitting elements 2 to be mounted are two-dimensionally arranged in a matrix as shown in FIG. At this time, it is preferable that the light emitting element 2 is mounted on the mounting substrate 3 as it is as an unpackaged element such as a bare chip LED. This is because the mounting density of the light emitting elements 2 can be increased and the amount of light of the lighting device 1 can be increased by this mounting.

  Each of the plurality of refrigerant pipes 6 is provided corresponding to the column direction of the mounting arrangement of the mounted light emitting elements 2. As described above, the refrigerant pipe 6 includes the storage portion 61 inside the mounting substrate 3 and the exposed portion 62 that is exposed to the outside and extends. The storage portion 61 and the exposed portion 62 have a continuous extended shape.

  The refrigerant pipe 6 encloses the refrigerant inside. That is, the refrigerant pipe 6 can circulate (circulate) this refrigerant inside.

The light emitting element 2 emits light upon receiving electric power. During this light emission, heat is generated to transmit the heat to the mounting substrate 3. At this time, since the light emitting elements 2 are arranged in a matrix as shown in FIG. 6, heat is transmitted to the mounting substrate 3 in accordance with the mounting arrangement. A storage portion 61 of the refrigerant pipe 6 is stored inside the mounting substrate 3 along the row of the mounting arrangement. That is, the heat from the light emitting element 2 is transmitted to the storage portion 61.
Here, the refrigerant pipe 6 has an elongated shape, and includes a first passage 65 and a second passage 66 that are separated by the exposed portion 62 and are independent. Alternatively, the inside has a circular shape, and is separated into two internal spaces by a wall such as a partition, and is separated into a first passage 65 and a second passage 66. In the two spaces of the first passage 65 and the second passage 66, the encapsulated refrigerant moves back and forth to move and release heat.
(When the circular shape is separated inside)

  As shown in FIG. 7, the refrigerant pipe 6 has a first passage 65 and a second passage 66. The refrigerant pipe 6 includes a mounting board side partition wall 67 on the mounting board side which is a heat generating portion in the internal space. Furthermore, the refrigerant | coolant pipe line 6 is provided with the heat sink side partition 68 in the internal space in the heat sink 7 side which is a heat radiating part. Each of the plurality of refrigerant pipes 6 is divided into a first passage 65 facing the first direction and a second passage 66 facing the second direction by the mounting substrate side partition 67 and the heat sink side partition 68. .

  Here, as shown by the arrows in FIG. 7, the first direction and the second direction are different directions. Furthermore, in the refrigerant pipe 6 having a circular shape, for example, the right direction is the first direction, and the left direction opposite to this is the second direction. Thus, since the first direction and the second direction are opposite directions, the first passage 65 and the second passage 66 are respectively provided on the opposite side in the refrigerant pipe 6. At this time, the first passage 65 is provided on one side and the second passage 66 is provided on the opposite side with respect to the mounting substrate side partition 67 and the heat sink partition 68. That is, each of the refrigerant pipes 6 is divided into two, which are a first passage 65 and a second passage 66 that face each other.

  The first passage 65 is a space that is substantially sealed from the mounting substrate side partition wall 67 to the heat sink plate side partition wall 68. The first passage 65 encloses the refrigerant inside this space. Similarly, the second passage 66 is a space that is substantially sealed from the mounting substrate side partition wall 67 to the heat sink side partition wall 68. The second passage 66 encloses the refrigerant in this internal space.

  That is, the refrigerant pipe 6 individually encloses the refrigerant in each of the divided first passage 65 and second passage 66. For this reason, the refrigerant pipe line 6 operates each of the first passage 65 and the second passage 66 individually, and efficiently generates heat (heat generated by the light emitting element 2) generated in the mounting substrate 3 due to refrigerant circulation. Release.

  Here, the refrigerant conduit 6 includes a storage portion 61 stored in the mounting substrate 3 and an exposed portion 62 exposed from the mounting substrate 3. With this configuration, each of the refrigerant pipes 6 can form a circular shape from the inside of the mounting substrate 3 to the external heat sink 7.

(Operation in the first passage)
The first passage 65 encloses a refrigerant inside. The first passage 65 has a capillary channel therein. With this capillary channel, the condensed refrigerant can be recirculated. In accordance with this, the inside of the first passage 65 is provided with the remainder of the capillary channel. The evaporated vaporized refrigerant can move around the remaining part.

  The first passage 65 is in thermal contact with the mounting substrate 3 in the mounting substrate side partition wall 67. Due to the thermal contact with the mounting substrate 3, the refrigerant sealed in the first passage 65 receives heat from the mounting substrate 3. By receiving this heat, the refrigerant is vaporized to become a vaporized refrigerant.

  The vaporized refrigerant starts to move inside the first passage 65 in the first direction along the arrow A in FIG. Since the first passage 65 is a part of the circular shape, the vaporized refrigerant moves as it is in the first passage 65 as indicated by an arrow B and reaches the heat-radiating plate side partition wall 68 that is the end thereof.

  In the vicinity of the heat sink plate-side partition wall 68, the refrigerant pipe 6 intersects the heat sink plate 7. By this intersection, the exposed portion 62 of the refrigerant pipe 6 is in thermal contact with the heat radiating plate 7. By this thermal contact, the heat radiating plate 7 can release the heat carried by the vaporized refrigerant by movement. An arrow I indicates the release of heat from the heat radiating plate 7 to the outside.

  Due to the release of this heat, the vaporized refrigerant is deprived of heat and cooled. By this cooling, the refrigerant is condensed and liquefied. The condensed refrigerant flows back through the capillary channel inside the first passage 65. The recirculation starts from the heat sink partition 68, which is the portion that has radiated heat, along the arrow C in FIG. Further, the inside of the first passage 65 is refluxed, and the condensed refrigerant returns toward the mounting substrate side partition wall 67 along the arrow D.

  As described above, the refrigerant reciprocates between the mounting substrate side partition wall 67 and the heat sink plate side partition wall 68 in the first passage 65. By this reciprocation, the heat generated in the mounting substrate 3 is repeatedly transported to the heat radiating plate 7 and released to the outside. That is, heat exchange is performed.

(Operation in the second passage)
The second passage 66 is similar to the first passage 65 and independently encloses the refrigerant therein. The second passage 66 has a capillary channel therein. With this capillary channel, the condensed refrigerant can be recirculated. In accordance with this, the inside of the second passage 66 is provided with the remainder of the capillary channel. The evaporated vaporized refrigerant can move around the remaining part.

  The second passage 66 is in thermal contact with the mounting substrate 3 in the mounting substrate side partition wall 67. Due to the thermal contact with the mounting substrate 3, the refrigerant sealed in the second passage 66 receives heat from the mounting substrate 3. By receiving this heat, the refrigerant is vaporized to become a vaporized refrigerant.

  The vaporized refrigerant starts to move inside the second passage 66 in the second direction along the arrow E in FIG. Since the second passage 66 is a part of the circular shape, the vaporized refrigerant moves as it is in the second passage 66 as indicated by the arrow F and reaches the heat sink side partition wall 68 that is the end thereof.

  Here, as can be seen from the difference between the arrow A and the arrow E, the second passage 66 moves the vaporized refrigerant in the opposite direction to the first passage 65. That is, heat is moved in the direction opposite to that of the first passage 65. The first passage 65 and the second passage 66 are independent of each other. In this independent state, by transferring heat in the opposite direction, sufficient heat transfer can be realized with respect to the capacity of the internal space of the refrigerant pipe 6. It is possible to move and discharge a high amount of heat by heat transfer (and heat release) in two directions, rather than making one circulation of the circulation-shaped refrigerant pipe 6.

  In the vicinity of the heat sink plate-side partition wall 68, the refrigerant pipe 6 intersects the heat sink plate 7. By this intersection, the exposed portion 62 of the refrigerant pipe 6 is in thermal contact with the heat radiating plate 7. By this thermal contact, the heat radiating plate 7 can release the heat carried by the vaporized refrigerant by movement. An arrow J indicates the release of heat from the heat radiating plate 7 to the outside.

  Due to the release of this heat, the vaporized refrigerant is deprived of heat and cooled. By this cooling, the refrigerant is condensed and liquefied. The condensed refrigerant flows back through the capillary channel inside the second passage 66. The reflux starts from the heat sink partition 68, which is the portion that has radiated heat, along the arrow G in FIG. Further, the inside of the second passage 66 is refluxed, and the condensed refrigerant returns toward the mounting substrate side partition wall 67 along the arrow H.

  In this manner, the refrigerant reciprocates between the mounting substrate side partition wall 67 and the heat sink plate side partition wall 68 in the second passage 66. By this reciprocation, the heat generated in the mounting substrate 3 is repeatedly transported to the heat radiating plate 7 and released to the outside. That is, heat exchange is performed.

  As described above, similarly to the first passage 65, the second passage 66 can perform heat exchange in the reverse direction. Due to the movement and release of the heat separated into the first passage 65 and the second passage 66 divided in the opposite directions, heat in the mounting substrate 3 that emits heat is released in both directions. By being divided and released in both directions, the heat emission efficiency of the entire mounting substrate 3 is increased. Theoretically, it is about double that of one-way traffic.

  As a result, as described in features 1 to 3, a large number of light-emitting elements 2 can be mounted in a matrix and at a high density. Naturally, the illuminating device 1 can irradiate widely to a distant place with a high light quantity.

(Separated first and second passages)
Alternatively, the configuration in which the circulation-shaped refrigerant pipe 6 is not separated into the first passage 65 and the second passage 66 inside, but the elongated refrigerant pipe 6 is separated at the exposed portion 62 is also possible. Good. For example, FIG. 10 shows a state in which the extending portion from the one side and the extending portion from the other side are separated when the refrigerant pipe 6 having an extended shape is the exposed portion 62 and passes through the heat radiating plate 7. . As described above, the refrigerant pipe 6 separated into the first passage 65 and the second passage 66 may be used as another physical element separated at the exposed portion 62.

  The extending portion from one of the refrigerant pipes 6 separated in this way is the first passage 65 and the extending portion from the other is the second passage 66, so that each of the first passage 65 and the second passage 66 is provided. Thus, the movement and release of heat by the reciprocating movement of the refrigerant can be realized.

  At this time, the first passage 65, which is an extended portion from one of the separated refrigerant pipes 6, encloses the refrigerant therein. Similarly, the second passage 66 also contains a refrigerant inside. In the first passage 65, the refrigerant is vaporized by the heat received by the portion of the mounting substrate 3. The vaporized refrigerant that has vaporized moves inside the first passage 65 from the mounting board side to the heat sink side.

  This movement transports heat. The vaporized refrigerant that has reached the heat sink side is condensed by the heat release from the heat sink 7. The condensed refrigerant that has condensed flows back through the first passage 65 from the radiator plate side to the mounting substrate side. By this reflux, the mounting substrate 3 can again receive heat and vaporize.

The same applies to the second passage 66. The refrigerant sealed in the second passage 66 is vaporized by the heat of the mounting substrate 3 and becomes a vaporized refrigerant. The vaporized refrigerant moves from the mounting substrate side to the heat sink side. The vaporized refrigerant is condensed by the heat radiation from the heat radiating plate 7. The condensed refrigerant recirculates in the second passage 66 from the heat sink side to the mounting board side by capillary action. By this reflux, it is possible to repeat the movement of the heat of the mounting substrate 3 again.

  In addition, each of the refrigerant pipes 6 is provided along a row of the mounting arrangement of the mounted light emitting elements 2. For this reason, the heat which arises along the row | line | column of the light emitting element 2 arranged in two dimensions can be taken out by the one refrigerant | coolant pipe line 6, and can be discharge | released outside. For this reason, the heat generated according to the mounting arrangement of the light emitting elements 2 can be taken along the mounting arrangement and released. As a result, heat can be released with an optimal balance in the balance between the mounting of the light emitting element 2, the size of the mounting substrate 3, and the number of the refrigerant pipes 6.

  As a result, the heat problem transmitted from the light emitting element 2 to the mounting substrate 3 with the maximum effect can be solved with the minimum configuration.

  Of course, in addition to the refrigerant pipelines 6 along the rows of the mounting arrangement shown in FIG. 7, it is also preferable to provide another refrigerant pipeline 6 along the row direction. In this case, the refrigerant pipe 6 also has a structure two-dimensionally along both the column direction and the row direction. In this case, the heat generated by the light emitting element 2 can be taken in both the column direction and the row direction, and released to the outside.

  As described above, the lighting device 1 according to Embodiment 1 can solve the thermal problem that is required when the mounting density of the light emitting elements 2 is improved.

  (Embodiment 2)

  Next, a second embodiment will be described. In the second embodiment, details of each part and other aspects will be described.

(Light emitting element)
The light emitting element 2 uses an LED or the like. The mounting substrate 3 electrically mounts the light emitting element 2 by various methods (wire bonding or the like). In this mounting, wiring for supplying power and control signals to the light emitting element 2 is also mounted.

  As shown in FIG. 6, the plurality of light emitting elements 2 are mounted in a mounting arrangement having a column direction and a row direction. That is, it is arranged in two dimensions and mounted. As shown in FIG. 6, it may be in the form of a matrix, or a two-dimensional array in which the light emitting elements 2 are slightly shifted from each other.

  By mounting with high density, it becomes possible to irradiate far away with high light quantity. It is also preferable that the interval between the light emitting elements 2 arranged in a two-dimensional array or a one-dimensional array is equal to or smaller than the size of the light emitting elements 2. <1> A certain light-emitting element 2 in which the interval between adjacent light-emitting elements 2 is equal to or smaller than the size of the light-emitting element 2, so that the ratio of the overlapping range of light emitted from each of the light-emitting elements 2 increases. The two points that the light emitted from the light source is reflected by the side surface of the adjacent light emitting element 2 are realized. By realizing these two points, the light emitted from the plurality of light emitting elements 2 can be irradiated with light as if it were a single light source in combination with reflection and overlap on the side surfaces.

  Moreover, as above-mentioned, when the light emitting element 2 is LED, it is also preferable that it is a bare chip. This is because mounting area can be reduced by mounting with a bare chip.

  It is also preferable that a front cover 8 provided in the irradiation direction of the plurality of light emitting elements 2 to converge or diffuse the light emitted from the plurality of light emitting elements 2 is further provided. This is because the front cover front cover 8 can widen the light irradiation variation of the lighting device 1 by narrowing or widening the light irradiation angle generated only by the integration of the plurality of light emitting elements 2. The front cover 8 may have a lens structure or may have a lens surface laminated. For example, a lens plate may be mounted inside the front cover 8.

(Mounting board)
The mounting substrate 3 mounts the plurality of light emitting elements 2 on the mounting surface. It also has wiring necessary for mounting. The wiring may be wiring using independent conductive lines, or wiring printed on the front surface, back surface, and inner layer of the mounting substrate 3 such as a so-called printed board.

  The mounting substrate 3 is an electronic substrate that realizes electrical wiring and the like for mounting the light emitting element 2, and is also a mechanical substrate that forms the skeleton of the lighting device 1. The mounting substrate 3 electrically mounts the light emitting element 2 on the surface thereof, and stores a part of the refrigerant pipe 6 inside through a through hole 31 provided inside. That is, the light emitting element 2 is mounted and fixed on the light emitting surface, and the refrigerant pipe 6 is attached and fixed on the opposite surface. The refrigerant pipe 6 is connected to the heat radiating plate 7 and fixes the heat radiating plate 7. That is, it can be said that the mounting substrate 3 also fixes the refrigerant pipe 6 and the heat sink 7.

  When the hood part 4 is provided, the hood part 4 is attached to the mounting substrate 3. For this reason, not only the light emitting element 2 but also the hood part 4 can be fixed on the light emitting surface. Thus, the mounting substrate 3 is also a mechanical skeleton.

  Thus, it is preferable that the mounting substrate 3 that achieves both the electronic substrate and the mechanical substrate is formed of at least one of a metal, an alloy, and a mixture thereof. In particular, by using such a material, the thermal conductivity is increased, and the heat from the light emitting element 2 is easily conducted to the storage portion 61 of the refrigerant pipe 6 stored in the through hole 31. Due to this high conductivity, heat generated on the mounting surface of the light emitting element 2 is efficiently conveyed to the heat radiating plate 7 through the refrigerant pipe 6.

(Refrigerant pipeline)
The refrigerant duct 6 is provided along the column direction or the row direction of the mounting arrangement of the light emitting elements 2. As a result, the number of the refrigerant pipes 6 is the same as the number of columns and the number of rows in mounting the light emitting element 2. In addition, the refrigerant pipe 6 includes a storage portion 61 stored inside the mounting substrate 3 and an exposed portion 62 that is extended and exposed.

  The refrigerant pipe 6 penetrates the heat radiating plate 7 in the exposed portion 62. By this penetration, the refrigerant pipe 6 and the heat sink 7 are in thermal contact. At this time, it is also preferable that all of the plurality of refrigerant pipelines 6 penetrate the heat radiating plate 7. Thereby, the heat in the mounting substrate 3 transported by the refrigerant pipe 6 can be efficiently released to the outside.

  Here, as shown in FIG. 7, the refrigerant pipeline 6 has a portion that is substantially parallel to the mounting substrate 3 in the exposed portion 62. In the substantially parallel portion, the refrigerant pipe 6 passes through the heat radiating plate 7. FIG. 8 is a side view of the lighting apparatus according to Embodiment 2 of the present invention.

  Each of the refrigerant pipes 6 is divided into a first passage 65 and a second passage 66 as described with reference to FIG. 7, and the refrigerant reciprocates in each of them.

  FIG. 8 shows a state where a plurality of heat radiating plates 7 are penetrated by a plurality of refrigerant pipes 6. By such penetration, the heat radiating plate 7 is thermally connected to the refrigerant pipe 6 and fixed by the refrigerant pipe 6.

  FIG. 9 is a side view from another direction of the illumination device according to the second embodiment of the present invention. FIG. 9 is a side view from an angle 90 degrees different from FIG. As shown in FIG. 9, the plurality of refrigerant pipes 6 penetrate the plurality of heat radiating plates 7. At this time, the refrigerant pipe 6 may be extended so as to expand in the exposed portion 62 so as to be thermally connected to the heat radiating plate 7 in a wider range. By extending while spreading in this manner, each of the plurality of refrigerant pipes 6 penetrates various places of the heat radiating plate 7. As a result, each of the plurality of refrigerant pipes 6 can use the heat radiating plate 7 more efficiently.

(Heatsink)
The plurality of heat sinks 7 may include through holes 9. The refrigerant pipe 6 passes through the through hole 9. That is, in this through hole 9, the refrigerant pipe 6 and the heat radiating plate 7 are in thermal contact. The heat radiating plate 7 can be thermally connected to the refrigerant pipe 6 by the thermal contact in the through hole 9. With this thermal connection, the heat radiating plate 7 can release the heat transported by the refrigerant pipe 6 to the outside.

  Due to the release of heat from the heat radiating plate 7, the vaporized refrigerant that has moved through the refrigerant pipe 6 is cooled and condensed. By condensation, it becomes a condensed refrigerant. Since the refrigerant pipe 6 has an internal configuration that generates an osmotic pressure (a thin pipe or has a mesh structure therein), the condensed refrigerant is refluxed.

  The plurality of heat sinks 7 may be arranged at appropriate intervals as shown in FIG. Since the heat radiating plate 7 is plural, the surface area of the entire heat radiating plate 7 is increased and the heat radiating effect is enhanced. In addition, as shown in FIG. 8, heat convection is generated between the adjacent radiator plates 7 by arranging the plurality of radiator plates 7 at appropriate intervals. Due to this heat convection, the heat radiating plate 7 can efficiently release the heat transmitted from the refrigerant pipe 6 to the outside.

  FIG. 10 is a rear view of the lighting apparatus according to Embodiment 2 of the present invention. As is clear from FIG. 10, the plurality of heat sinks 7 are arranged substantially in parallel. A plurality of refrigerant pipes 6 pass through the plurality of heat radiating plates 7. The plurality of heat radiating plates 7 and the plurality of refrigerant pipes 6 intersect so as to be substantially orthogonal to each other.

  That is, the plurality of heat sinks 7 and the plurality of refrigerant pipes 6 are combined so as to intersect. With this combined structure, the heat radiating plate 7 is reliably fixed to the mounting substrate 3 through the refrigerant pipe 6. With these mutual fixings, the lighting device 1 can ensure sufficient strength while being provided with various members such as the refrigerant pipe 6 and the heat radiating plate 7.

  Moreover, the heat which the refrigerant | coolant pipe line 6 conveys becomes easy to conduct to the heat sink 7 by crossing and combining. Further, the combination of the plurality of refrigerant pipes 6 and the plurality of heat radiating plates 7 further promotes conduction. As a result, the heat transported by the refrigerant pipe 6 is efficiently released in the heat radiating plate 7.

(Features of mounting board)
FIG. 11 is a side view of the mounting board according to the second embodiment of the present invention. FIG. 11 shows a state in which the mounting substrate 3 on which the light emitting element 2 is mounted is viewed from the side.

  A mounting substrate 3 in FIG. 11 has a plurality of light emitting elements 2 mounted along the column direction or the row direction of the mounting array. At this time, the protrusion 50 is provided between each column or row in the column direction or the row direction. The protrusion 50 separates between adjacent columns or rows. That is, a certain column and an adjacent column are blocked, or a certain row and an adjacent row are blocked.

  By this shielding, heat conduction can be limited between the light emitting elements 2 in one column adjacent in the column direction or the row direction. Further, the refrigerant pipe 6 is provided along each column or each row divided by the protrusion 50. As a result, the individual refrigerant pipes 6 can reliably receive heat from the light emitting elements 2 generated in the corresponding columns and rows.

  Further, since the protrusions 50 are difficult to transmit heat from the light emitting elements 2 in adjacent columns and rows, the entire mounting substrate 3 is difficult to have heat. Since the refrigerant pipe 6 takes away the heat remaining in the columns and rows in a state where heat is not easily transmitted and releases it to the outside, the heat radiation effect by the refrigerant pipe 6 and the heat radiating plate 7 is further enhanced.

  In the present specification, one direction of the two-dimensional mounting array is defined as a column direction, and a direction substantially perpendicular to the column direction is defined as a row direction. The column direction may be defined as the first direction, and the row direction may be defined as the second direction. At this time, in the two-dimensional mounting arrangement, the arrangement of the plurality of light emitting elements 2 in the column direction may not necessarily match the adjacent distance and position. The arrangement of the plurality of light emitting elements 2 in the row direction is the same.

  As described above, the lighting device 1 according to Embodiment 2 can efficiently release the heat even when a large number of light emitting elements 2 are mounted. As a result, problems and failures of the light emitting element 2 and the mounting substrate 3 can be prevented.

  As mentioned above, the illuminating device demonstrated by Embodiment 1-2 is an example explaining the meaning of this invention, and includes the deformation | transformation and remodeling in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Light emitting element 3 Mounting board 31 Through-hole 4 Hood part 6 Refrigerant conduit 61 Storage part 62 Exposed part 7 Heat sink 8 Front cover 9 Through-hole 50 Protrusion part

Claims (17)

A plate-shaped mounting board;
A plurality of light emitting elements mounted along a plurality of mounting arrays on the mounting substrate;
A plurality of refrigerant pipes that extend from the inside to the outside of the mounting substrate and that are provided along the plurality of mounting arrangement column directions or row directions;
A heat sink through which the plurality of refrigerant pipes penetrates,
Each of the plurality of refrigerant conduits has an extending shape that extends after penetrating through the planar direction inside the mounting substrate and projecting to the outside,
Each of the extending plurality of refrigerant pipes encloses a refrigerant therein, and transports heat generated in the mounting arrangement to the heat radiating plate by vaporization and condensation of the refrigerant. Each of the plurality of refrigerant pipes has a storage portion that is stored and penetrated inside a plate-shaped mounting substrate, and an exposed portion that extends and is exposed to the outside of the mounting substrate.
The lighting device according to claim 1, wherein the storage portion and the exposed portion are connected to form the extended shape. Each of the plurality of refrigerant pipes is separated at the exposed portion, and a first passage extending from the mounting substrate in a first direction and a second direction extending in a second direction opposite to the first direction. A passage,
The lighting device according to claim 1, wherein the first passage and the second passage are separated. When each of the plurality of refrigerant pipes has a circular shape, the inside of each of the plurality of refrigerant pipes includes a mounting board side partition that separates the inside on the mounting board side, and an inside on the heat radiating plate side. A heat sink side partition to be separated,
A first direction from the mounting substrate side partition to the heat sink side partition is the first passage,
The lighting device according to claim 3, wherein a second direction opposite to the first direction from the mounting substrate side partition to the heat sink side partition is a second passage. The first passage encloses a refrigerant therein, and can circulate the refrigerant inside the first passage.
5. The lighting device according to claim 3, wherein the second passage encloses a refrigerant therein and circulates the refrigerant inside the second passage. 6. The first passage vaporizes the refrigerant in the storage portion corresponding to the mounting arrangement, moves the vaporized vaporized refrigerant from the mounting substrate side to the heat radiating plate side,
The second passage evaporates the refrigerant in the storage portion corresponding to the mounting arrangement, moves the vaporized refrigerant evaporated from the mounting substrate side to the heat radiating plate side,
The lighting device according to claim 5, wherein a moving direction of the vaporized refrigerant in the first passage is different from a moving direction of the vaporized refrigerant in the second passage. The first passage is the exposed portion, and heat exchange with the heat radiating plate condenses the vaporized refrigerant,
The lighting device according to claim 6, wherein the second passage is the exposed portion and condenses the vaporized refrigerant by heat exchange with the heat radiating plate. The first passage causes the condensed condensed refrigerant to flow back from the radiator plate side to the mounting substrate side,
The lighting device according to claim 7, wherein the second passage causes condensed condensed refrigerant to flow back from the heat dissipation plate side to the mounting substrate side.   9. The lighting device according to claim 3, wherein each of the plurality of refrigerant pipes performs refrigerant circulation in different directions separated by the first passage and the second passage.   The lighting device according to claim 2, wherein the plurality of refrigerant pipes penetrate the heat radiating plate in the exposed portion.   The heat dissipation plate is substantially perpendicular to the mounting substrate, and is thermally connected to the mounting substrate and indirectly fixed by penetrating the exposed portion through a parallel portion substantially parallel to the mounting substrate. The lighting device according to claim 10.   The lighting device according to claim 1, wherein there are a plurality of the heat radiating plates.   The lighting device according to claim 1, wherein the number of the refrigerant pipes and the number of columns or rows in the mounting arrangement are the same.   The lighting device according to claim 1, wherein each of the plurality of refrigerant pipes is provided along each of a column direction and a row direction in the mounting arrangement.   The lighting device according to claim 1, wherein the mounting substrate is formed of at least one of a metal, an alloy, and a mixture thereof.   The mounting board has a plurality of through holes in a thickness portion along a column direction or a row direction, and a storage portion of the refrigerant pipe is stored in the through hole. The lighting device described.   The said mounting board | substrate is an illuminating device of any one of Claims 1-16 provided with a protrusion part between the column direction or row direction of the said light emitting element.