JP2018084520A - Light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device which improves cooling efficiency by reducing a space occupied by a radiator plate in a housing.SOLUTION: A light source device includes: a housing 10; a metal block 21 arranged in a housing; an LED substrate 40 fixed on a front surface of the metal block 21; a first radiator plate group 21 which is arranged on the right side in the housing and is composed of a plurality of radiator plates 21a arranged in a back and forth direction at intervals; a second radiator plate group 22 which is arranged on the left side in the housing at intervals horizontally from the first radiator plate group and are composed of a plurality of radiator plates 22a arranged at intervals in a back and forth direction; vent holes provided for positions corresponding to the first and the second radiator plate groups in the housing respectively; a heat pipe connecting the metal block with the first and second radiator plate groups; and a fan device at least a part of which is arranged between the first and the second radiator plate groups.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light source device, for example, a light source device that supplies light to an illumination device used for various inspections.

As this type of light source device, an LED, a lens that collects light from the LED, and an optical fiber bundle into which light from the lens enters from one end are provided, and light from the other end of the optical fiber bundle is received. What is comprised so that it may supply to the illuminating device for a test | inspection is known (for example, refer patent document 1).
A light source device using a heat pipe for cooling the LED is also known (see, for example, Patent Document 2).

JP 2006-017563 A JP 2011-002545 A

  In the latter light source device, the heat pipe passes through the plurality of heat radiating plates, and the heat pipe and the heat radiating plate are arranged in the housing, and air is introduced into the housing by a fan and the heat radiating plate is cooled by the air. It is configured as follows. In order to improve the cooling efficiency, the gap between the heat sinks is set to be small and the area of the heat sink is set to be large so that efficient heat exchange is performed when air passes through a narrow space between the heat sinks. Has been.

As described above, in the light source device, since a plurality of heat radiating plates having a large area are arranged in parallel in the housing, the space in which the heat radiating plates are arranged in the housing is not small.
Further, in recent years, the brightness of LEDs has been increasing, and the amount of heat generated by LEDs has increased in conjunction with this, so that the space occupied by the heat sink in the housing tends to become larger.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the light source device which can improve cooling efficiency, after reducing the space which a heat sink occupies in a housing | casing. .

  A light source device according to a first aspect of the present invention includes a housing, a metal block disposed in the housing, an LED substrate fixed to the front surface of the metal block, and a right side in the housing. A first heat radiating plate group consisting of a plurality of heat radiating plates arranged at intervals in the front-rear direction, and arranged on the left side in the housing with a space in the left-right direction from the first heat radiating plate group, Provided at a position corresponding to the second heat radiating plate group composed of a plurality of heat radiating plates arranged at intervals in the front-rear direction, and the first heat radiating plate group and the second heat radiating plate group in the housing, respectively. A ventilation pipe, a heat pipe connecting the metal block, the first heat radiating plate group, and the second heat radiating plate group, and the first heat radiating plate group and the second heat radiating plate group. And at least a part of the fan device disposed between

  In the first aspect, the heat pipe extends from the metal block to the right and left sides, the right heat pipe is connected to the first heat radiating plate group, and the left heat pipe is connected to the second heat radiating plate group. The fan device having at least a part disposed between the first and second heat radiating plate groups, and the air vents provided corresponding to the first and second heat radiating plate groups, respectively. And air distribute | circulates efficiently to the 2nd heat sink group, respectively. For this reason, the LED substrate fixed to the metal block can be efficiently cooled.

Further, since the air introduced into the housing by the fan device passes through the space between the first heat radiating plate group and the second heat radiating plate group, the air easily reaches the metal block or the LED substrate. It is also possible to reduce the temperature around the manufactured block and the LED substrate.
Further, the space between the first heat radiating plate group and the second heat radiating plate group can be utilized for the arrangement of the fan device, the LED drive circuit, the control device, and the like.

It is preferable that the light source device according to the first aspect further includes a constant current circuit for supplying power to the LEDs of the LED substrate, and a transistor constituting the constant current circuit is fixed to the metal block.
In this case, when the LED emits light with high luminance, the transistor that becomes high temperature is cooled by the metal block in the same manner as the LED substrate. In addition, air introduced into the housing by the fan device can easily reach the transistor through the space between the first heat radiating plate group and the second heat radiating plate group, which is advantageous for cooling the transistor.

  A light source device according to a second aspect of the present invention includes a housing, a metal block disposed in the housing, an LED substrate fixed to the front surface of the metal block, and a right side in the housing. A first heat radiating plate group consisting of a plurality of heat radiating plates arranged at intervals in the front-rear direction, and arranged on the left side in the housing with a space in the left-right direction from the first heat radiating plate group, Provided at a position corresponding to the second heat radiating plate group composed of a plurality of heat radiating plates arranged at intervals in the front-rear direction, and the first heat radiating plate group and the second heat radiating plate group in the housing, respectively. The first heat pipe connecting the vent block, the metal block, the first heat radiating plate group and the second heat radiating plate group, and the first heat pipe, Metal block, first heat sink group and front A second heat pipe connecting the second heat radiating plate group, and a fan device having at least a portion disposed between the first heat radiating plate group and the second heat radiating plate group in the housing. A connecting portion between the metal block and the first heat radiation plate group in the second heat pipe is inclined upward toward the first heat radiation plate group.

  Also in the second aspect, the heat pipe extends from the metal block to the right and left sides, the right heat pipe is connected to the first heat radiating plate group, and the left heat pipe is connected to the second heat radiating plate group. The first and second heat radiation plate groups, and at least a part of the fan device disposed between the first and second heat radiation plate groups and the vent holes provided corresponding to the first and second heat radiation plate groups, respectively. Air circulates efficiently through the second heat sink group. For this reason, the LED substrate fixed to the metal block can be efficiently cooled.

Moreover, since the air introduced into the housing by the fan device passes through the space between the first heat radiating plate group and the second heat radiating plate group, the air easily reaches the metal block or the LED substrate. The temperature around the metal block or LED substrate can also be reduced.
Furthermore, the space between the first heat radiating plate group and the second heat radiating plate group can be utilized for the arrangement of a fan device, an LED drive circuit, a control device, and the like.

  The first and second heat pipes (plural heat pipes) extending from the right side of the metal block are connected to the first heat radiating plate group, and the second heat pipe is connected to the first heat radiating plate group at the connection portion. Since the distance between the first heat pipe and the second heat pipe is increased by the inclination of the connecting portion in the first heat radiating plate group, the metal block side in the heat pipe The liquefied refrigerant is sent efficiently.

In the light source device according to the second aspect, a third heat is disposed above the second heat pipe and connects the metal block, the first heat radiating plate group, and the second heat radiating plate group. A pipe further comprising a connecting portion between the metal block and the first heat radiating plate group in the third heat pipe that is inclined upward toward the first heat radiating plate group; It is preferable that a difference in height of the connection portion of the heat pipe is larger than a difference in height of the connection portion of the second heat pipe.
In this case, since the vertical distance between the three heat pipes in the first heat radiating plate group is increased by the inclination of the connecting portion of the second and third heat pipes, the metal block in the heat pipe The liquefied refrigerant is efficiently sent to the side.

  According to the present invention, it is possible to improve the cooling efficiency while reducing the space occupied by the heat sink in the housing.

It is a partial cross section top view of the light source device which concerns on one Embodiment of this invention. It is a left view of the light source device of this embodiment. It is a front view of the light source device of this embodiment. It is a rear view of the light source device of this embodiment. It is a schematic block diagram of the light source device of this embodiment. It is a front view of LED with a heat sink of this embodiment. It is a rear view of LED with a heat sink of this embodiment. It is a left view of LED with a heat sink of this embodiment. It is a right view of LED with a heat sink of this embodiment. It is a top view of LED with a heat sink of this embodiment. It is a bottom view of LED with a heat sink of this embodiment. In FIG. 6, a part that is particularly characteristic in appearance is represented by a solid line, and the other part is represented by a broken line. In FIG. 7, a part that is particularly characteristic in appearance is represented by a solid line, and the other part is represented by a broken line. In FIG. 8, a part that is particularly characteristic in appearance is represented by a solid line, and the other part is represented by a broken line. In FIG. 9, a part that is particularly characteristic in appearance is represented by a solid line, and the other part is represented by a broken line. In FIG. 10, a portion having a particularly characteristic appearance is represented by a solid line, and the other portion is represented by a broken line. In FIG. 11, a part that is particularly characteristic in appearance is represented by a solid line, and the other part is represented by a broken line.

A light source device according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the light source device 1 supplies light to an illumination device or the like via an optical fiber bundle 2. The light source device 1 includes a rectangular parallelepiped housing 10, an LED 20 with a heat sink fixed in the housing 10, and a fan device 30 fixed to the housing 10.
As illustrated in FIGS. 1 to 4, the housing 10 includes a bottom surface portion 11, a front surface portion 12, a back surface portion 13, a right side surface portion 14, a left side surface portion 15, and a top surface portion 16.

  The LED with heat sink 20 of the present embodiment includes a metal block 21, a first heat radiating plate group 22 disposed on the right side in the housing 10, and a second heat radiating plate group disposed on the left side in the housing 10. 23, three heat pipes 24, 25, and 26, and an LED substrate 27 on which the LED 27a is mounted. The first heat radiating plate group 22 is disposed along the right side surface portion 14, and the second heat radiating plate group 23 is disposed along the left side surface portion 15. Each of the heat sink groups 22 and 23 is composed of a plurality of metal heat sinks 22a and 23a arranged at intervals in the front-rear direction.

  The LED substrate 27 is fixed to the front surface of the metal block 21 with a fastening member such as a bolt. The LED 27a is a high output type in which a current of several A or more, preferably several tens of A (corresponding to power consumption of 100 W or more) flows. A first substrate 41 and a second substrate 42 (see FIG. 5) for controlling the lighting of the LED 27a and its output are provided in the housing 10. The first substrate 41 is located in the vicinity of the bottom surface portion 11 between the first heat radiation plate group 22 and the second heat radiation plate group 23 in the housing 10 or at a substantially intermediate position between the bottom surface portion 11 and the upper surface portion 16. Has been placed. The second substrate 42 is disposed above the first substrate 41, and is disposed, for example, in the vicinity of the upper surface portion 16 in the housing 10 as shown in FIG.

  As shown in FIG. 5, the first substrate 41 includes a DC power supply unit 44 that is connected to an external power source and supplies DC power to the constant current supply unit 43, an operational amplifier 41, and a current detection resistor 42. The constant current supply unit 43 includes a plurality of FETs (field effect transistors) 43a as transistors, and corresponds to a signal input from the current detection resistor 42 to the operational amplifier 41 and a signal input from the D / A conversion unit 46 to the operational amplifier 41. Thus, a large direct current is supplied to the LED 27a. The constant current supply unit 43 may be referred to as a DC-DC converter.

At least one of the FETs 43a is fixed to the back surface of the metal block 21. In the present embodiment, the first substrate 41 is fixed to the rear surface of the metal block 21 by a screw component and fixed to the upper end or the other end of the vertical substrate 41a. And a horizontally arranged substrate 41b extending in a substantially horizontal direction. That is, the FET 43a is fixed to the back surface of the metal block 21 through the vertically arranged substrate 41a. The FET 43a may be directly fixed to the metal block 21 without using a substrate.
Note that the DC power supply unit 44 that supplies power to the circuit may be provided outside the housing 10 instead of on the first substrate 41 in the housing 10 or the like.

  The second substrate 42 includes a control unit 45 composed of a microcomputer that sends a dimming signal to the operational amplifier 41 via the D / A conversion unit 46, a storage device 47 connected to the control unit 45, and the like. The control unit 45 is connected to a dimming knob 12f provided on the front surface part 12, and transmits a dimming signal corresponding to a signal from the dimming knob 12f.

  A fiber fixing member 12a is fixed to the front surface portion 12 of the housing 10 by a fastening member such as a bolt, and the fiber fixing member 12a has a through-hole 12b having a circular cross section that penetrates in the front-rear direction of the light source device. As shown in FIG. 1, the fiber fixing member 12a may be a combination of a plurality of members 12d and 12e, or may be a single member. The optical fiber bundle 2 is attached to the front end side of the fiber fixing member 12a.

  The LED board 27 is fixed to the metal block 21 so that the optical axis of the LED 27a coincides with the central axis of the through hole 12b of the fiber fixing member 12a, and thereby the light from the LED 27a is irradiated into the through hole 12b. . A condensing lens 12c that condenses the light that spreads from the LED 27a is fixed in the through hole 12b, and the light condensed by the condensing lens 12c is attached to the fiber fixing member 12a. Configured to enter. In the present embodiment, the number of condensing lenses 12c is one, but a plurality of condensing lenses may be used. In addition, the light collection referred to in the present embodiment means that light from the LED 27a that travels while spreading is bent in the optical axis direction, and the case where the light after being bent travels while slightly spreading is also included in the light collection.

  Each heat pipe 24, 25, 26 is sealed at its ends and sealed inside, and a working fluid such as water is sealed inside. The center portion of the heat pipe 24 is inserted through the lower end side of the metal block 21 in the left-right direction, and the one end side of the heat pipe 24 is inserted through the heat dissipating plates 22a of the first heat dissipating plate group 22 in the front-rear direction. The other end side of the pipe 24 is inserted through the heat radiating plates 23a of the second heat radiating plate group 23 in the front-rear direction.

  The central portion of the heat pipe 25 is inserted through the substantially central portion in the height direction of the metal block 21 in the left-right direction, and one end side of the heat pipe 25 passes through the heat dissipation plates 22a of the first heat dissipation plate group 22 in the front-rear direction. The other end side of the heat pipe 25 is inserted through the heat radiating plates 23a of the second heat radiating plate group 23 in the front-rear direction. Further, the connecting portion 25a between the metal block 21 and the first and second heat radiating plate groups 22 and 23 in the heat pipe 25 is inclined upward toward the first and second heat radiating plate groups 22 and 23 side. Yes. For this reason, the vertical distance between the heat pipe 24 and the heat pipe 25 in the first and second radiator plate groups 22 and 23 is the vertical distance between the heat pipe 24 and the heat pipe 25 in the metal block 21. On the other hand, it is larger, preferably 1.5 times or more, more preferably 2 times or more.

  The central portion of the heat pipe 26 is inserted through the substantially central portion in the height direction of the metal block 21 in the left-right direction, and one end side of the heat pipe 26 passes through the heat radiating plates 22a of the first heat radiating plate group 22 in the front-rear direction. The other end side of the heat pipe 26 is inserted through the heat radiating plates 23a of the second heat radiating plate group 23 in the front-rear direction. Further, the connecting portion 26a between the metal block 21 and the first and second heat radiating plate groups 22, 23 in the heat pipe 26 is inclined upward toward the first and second heat radiating plate groups 22, 23 side. Yes. For this reason, the vertical distance between the heat pipe 25 and the heat pipe 26 in the first and second heat radiating plate groups 22 and 23 is the vertical distance between the heat pipe 25 and the heat pipe 26 in the metal block 21. On the other hand, it is larger, preferably 1.5 times or more, more preferably 2 times or more.

The fan device 30 is fixed to the back surface portion 13 of the housing 10 using a fastening member 31 such as a bolt. The back surface portion 13 is provided with an opening 13 a at a position corresponding to the fan device 30. When the blades of the fan device 30 are rotated by a motor built in the fan device 30, air is introduced into the housing 10 through the opening 13 a or air is discharged from the housing 10.
As shown in FIG. 1, the front end side of the fan device 30 is disposed between the first heat radiating plate group 22 and the second heat radiating plate group 23. Note that the entire fan device 30 may be disposed between the first heat radiating plate group 22 and the second heat radiating plate group 23.

  A vent hole 14 a is provided at a position corresponding to the first heat radiating plate group 22 on the right side surface portion 14 of the housing 10, and a vent hole 15 a is also provided at a position corresponding to the second heat radiating plate group 23 on the left side surface portion 15. It has been. The range in which the ventilation openings 14a and 15a are provided preferably extends over a range of ½ or more of the side view range of the first heat radiating plate group 22 and the second heat radiating plate group 23, and is 2/3 or more. More preferably, it is within the range.

  The front surface portion 12 of the housing 10 is provided with a dimming knob 12f, a display portion 12g made of a liquid crystal display device, and the like, and the rear surface portion 13 is provided with a power supply line connection portion 13b, a communication cable connection portion 13c, and the like. .

  According to the present embodiment, the heat pipes 24, 25, 26 extend from the metal block 21 to the right side and the left side, respectively, and the right heat pipes 24, 25, 26 are connected to the first heat radiating plate group 22, and the left side The heat pipes 24, 25, and 26 are connected to the second heat radiating plate group 23, and at least a part of the fan device 30 is disposed between the first and second heat radiating plate groups 22 and 23, and the first The air efficiently circulates through the first and second heat radiating plate groups 22 and 23 by the vent holes 14a and 15a provided corresponding to the second heat radiating plate groups 22 and 23, respectively. For this reason, the LED board 27 fixed to the metal block 21 can be efficiently cooled.

Further, the air introduced into the housing 10 by the fan device 30 passes through the space between the first heat radiating plate group 21 and the second heat radiating plate group 22, and the air passes through the metal block 21 and the LED substrate 27. Therefore, the temperature around the metal block 21 and the LED substrate 27 can be reduced.
Further, the space between the first heat radiating plate group 22 and the second heat radiating plate group 23 can be utilized for the arrangement of the fan device 30, the LED drive circuit, the control device, and the like.

  Further, since the FET 43a for supplying the constant current controlled power to the LED 27a of the LED substrate 27 is fixed to the metal block 21, the FET 43a that becomes high temperature when the LED 27a emits light with high luminance is the same as the LED substrate 27. Cooled by the metal block 21. Further, since air introduced into the housing 10 by the fan device 30 easily reaches the FET 43a through the space between the first heat radiating plate group 22 and the second heat radiating plate group 23, the cooling of the FET 43 is achieved. It is advantageous.

  The first and second heat pipes 24 and 25 extending from the metal block 21 are connected to the first and second heat radiating plate groups 22 and 23, and the second heat pipe 25 is connected to the first and second heat pipes 25 and 23 at the connection portion 25a. The first heat pipe 24 and the second heat pipe 25 are connected to each other at the first and second heat dissipation plate groups 22 and 23. Since it becomes wider by the inclination of the portion 25a, the liquefied refrigerant in the heat pipes 24, 25 generated by the cooling of the first and second radiator plate groups 22, 23 is efficiently sent to the metal block side.

  In addition, it further includes a third heat pipe 26 that is disposed above the second heat pipe 25 and connects the metal block 21 and the first and second heat radiating plate groups 22, 23. A connecting portion 26a between the metal block 21 and the first and second heat radiating plate groups 22, 23 in the pipe 26 is inclined upward toward the first and second heat radiating plate groups 22, 23, and the third The height difference of the connection portion 26 a of the heat pipe 26 is greater than the height difference of the connection portion 25 a of the second heat pipe 25.

  For this reason, in the first and second heat radiating plate groups 22 and 23, the distance between the three heat pipes 24, 25 and 26 in the vertical direction is the connecting portion 25a of the second and third heat pipes 25 and 26. Since it becomes wider by the inclination of 26a, the liquefied refrigerant in the heat pipes 24, 25, 26 generated by cooling the first and second heat radiating plate groups 22, 23 is efficiently sent to the metal block 21 side.

  In the present embodiment, one heat pipe 24 passes through the first heat radiating plate group 22 and the second heat radiating plate group 23. On the other hand, the pair of heat pipes 24 are first stage heat pipes, one heat pipe 24 connects the metal block 21 and the first heat radiation plate group 22, and the other heat pipe 24 is the metal block 21. And the second heat radiation plate group 23 can be connected. The same applies to the heat pipe 25 and the heat pipe 26.

  DESCRIPTION OF SYMBOLS 1 ... Light source device, 2 ... Optical fiber bundle, 10 ... Housing | casing, 12a ... Fiber fixing | fixed part, 12b ... Through-hole, 12c ... Condensing lens, 20 ... LED with heat sink, 21 ... Metal block, 22 ... 1st heat dissipation Plate group, 22a ... radiator plate, 23 ... second radiator plate group, 23a ... radiator plate, 24 ... heat pipe, 25 ... heat pipe, 26 ... heat pipe, 30 ... fan device

Claims (4)

A housing,
A metal block disposed in the housing;
An LED substrate fixed to the front surface of the metal block;
A first heat dissipating plate group comprising a plurality of heat dissipating plates disposed on the right side in the housing and spaced in the front-rear direction;
A second heat dissipating plate group comprising a plurality of heat dissipating plates disposed on the left side in the housing with the first heat dissipating plate group spaced in the left-right direction and spaced in the front-rear direction;
Ventilation holes respectively provided at positions corresponding to the first heat radiating plate group and the second heat radiating plate group in the housing;
A heat pipe connecting the metal block to the first heat radiating plate group and the second heat radiating plate group;
A light source device comprising: a fan device having at least a part disposed between the first heat radiating plate group and the second heat radiating plate group in the housing. A constant current circuit for supplying power to the LED of the LED substrate;
The light source device according to claim 1, wherein a transistor constituting the constant current circuit is fixed to the metal block. A housing,
A metal block disposed in the housing;
An LED substrate fixed to the front surface of the metal block;
A first heat dissipating plate group comprising a plurality of heat dissipating plates disposed on the right side in the housing and spaced in the front-rear direction;
A second heat dissipating plate group comprising a plurality of heat dissipating plates disposed on the left side in the housing with the first heat dissipating plate group spaced in the left-right direction and spaced in the front-rear direction;
Ventilation holes respectively provided at positions corresponding to the first heat radiating plate group and the second heat radiating plate group in the housing;
A first heat pipe connecting the metal block to the first heat radiating plate group and the second heat radiating plate group;
A second heat pipe disposed above the first heat pipe and connecting the metal block to the first heat radiating plate group and the second heat radiating plate group;
A fan device having at least a part disposed between the first heat dissipation plate group and the second heat dissipation plate group in the housing;
A light source device in which a connecting portion between the metal block and the first heat radiating plate group in the second heat pipe is inclined upward toward the first heat radiating plate group. A third heat pipe that is disposed above the second heat pipe and connects the metal block, the first heat radiating plate group, and the second heat radiating plate group;
A connecting portion between the metal block and the first heat dissipation plate group in the third heat pipe is inclined upward toward the first heat dissipation plate group;
The light source device according to claim 3, wherein a difference in height of the connection portion of the third heat pipe is larger than a difference in height of the connection portion of the second heat pipe.

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