WO2022209959A1 - Dispositif d'émission de lumière - Google Patents

Dispositif d'émission de lumière Download PDF

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Publication number
WO2022209959A1
WO2022209959A1 PCT/JP2022/012302 JP2022012302W WO2022209959A1 WO 2022209959 A1 WO2022209959 A1 WO 2022209959A1 JP 2022012302 W JP2022012302 W JP 2022012302W WO 2022209959 A1 WO2022209959 A1 WO 2022209959A1
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WO
WIPO (PCT)
Prior art keywords
holes
irradiation device
light irradiation
light
heat radiating
Prior art date
Application number
PCT/JP2022/012302
Other languages
English (en)
Japanese (ja)
Inventor
浩明 渡邊
Original Assignee
Hoya株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoya株式会社 filed Critical Hoya株式会社
Priority to CN202280025883.4A priority Critical patent/CN117136337A/zh
Publication of WO2022209959A1 publication Critical patent/WO2022209959A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/20—Exposure; Apparatus therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/64—Heat extraction or cooling elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the present invention relates to a light irradiation device that includes an LED (Light Emitting Diode) as a light source and emits linear light, and more particularly to a light irradiation device that includes a heat dissipation member that dissipates heat emitted from the LED.
  • LED Light Emitting Diode
  • Patent Document 1 describes an ultraviolet irradiation head (light irradiation device) in which a large number of ultraviolet LED elements are arranged in a row.
  • the substrate on which the ultraviolet LED elements are arranged is thermally connected to a heat sink on which a large number of plate-like fins are formed, and is formed so that only the base end portion of the heat sink (part of the plate-like fins) is exposed. Outside air is taken in through the ventilation openings to cool the plate-like fins and further cool the ultraviolet LED elements.
  • the present invention has been made in view of the above circumstances, and it is possible to suppress the occurrence of pressure loss (intake loss) at the vent and efficiently cool the heat sink (heat radiation part) and the LED element (light source). It is an object of the present invention to provide a light irradiation device that is
  • the light irradiation device of the present invention irradiates a line of light extending in a first direction and having a predetermined line width in a second direction perpendicular to the first direction onto an irradiation surface.
  • a substrate defined by a first direction and a second direction; a plurality of light sources that emit light in a third direction; and a plurality of heat radiation fins standing at predetermined pitches along the first direction, and thermally coupled to the back side of the substrate.
  • a housing that accommodates at least the heat radiating portion and forms a wind tunnel through which cooling air for cooling the heat radiating fins flows; At least one of the side surfaces facing the second direction of the housing exhausts the cooling air to the outside through between the plurality of heat radiation fins, or allows the cooling air to flow from the outside between the plurality of heat radiation fins.
  • a vent is formed through which air is sucked, A is the total area of the opening of the vent, h is the height of the vent in the third direction, and h is the height of the plurality of heat dissipating fins in the third direction.
  • H be the width
  • W be the width in the first direction in which the plurality of heat radiating fins are formed
  • t be the thickness of each heat radiating fin in the first direction
  • n be the number of the plurality of heat radiating fins. It is characterized by satisfying the following conditional expressions (1) and (2).
  • the pressure loss (intake loss) at the vent is suppressed, and a sufficient amount of air is supplied to the heat radiating fins at a sufficient wind speed.
  • the light source can be uniformly and sufficiently cooled.
  • a plurality of through-holes formed in a manner of z (where z is an integer of 2 or more) along the third direction and x rows (where x is an integer of 2 or more) along the first direction. preferably configured. Further, in this case, it is desirable that the opening areas of the plurality of through-holes decrease toward the direction opposite to the third direction. Further, it is preferable that the through-holes in odd-numbered rows among the x-rows are shifted along the third direction with respect to the through-holes in even-numbered rows, and that the plurality of through-holes are arranged in a staggered manner as a whole. Moreover, it is desirable that at least a portion of the plurality of through holes be arranged to face the plurality of heat radiating fins.
  • the heat sink is arranged to face at least a part of the plurality of through holes, guides the air sucked from the plurality of through holes to the plurality of heat radiating fins, or guides the air exhausted from the plurality of heat radiating fins to the plurality of through holes. It is desirable to have a baffle plate that leads to
  • the pitch of the plurality of light sources in the first direction be greater than or equal to the pitch of the plurality of heat radiation fins in the first direction.
  • the vent is formed only on one side surface of the housing, the plurality of heat radiation fins are arranged close to one side, and a space is provided between the other side surface of the housing and the plurality of heat radiation fins. is formed, and it is desirable to have a drive circuit to drive a plurality of light sources in space. Also, in this case, it is desirable that the wind tunnel is composed of a first wind tunnel and a second wind tunnel that are bisected in the second direction by the drive circuit.
  • a filter that is arranged to block the air vent and absorbs ink mist.
  • the light includes a wavelength that acts on the ultraviolet curable resin.
  • the occurrence of pressure loss (intake loss) at the vent is suppressed, so that a light irradiation device capable of efficiently cooling the heat radiating part and the plurality of light sources is realized.
  • FIG. 1 is a diagram illustrating the configuration of a light irradiation device according to a first embodiment of the present invention.
  • FIG. 2 is a diagram illustrating the configuration of the light irradiation device according to the first embodiment of the present invention.
  • 3A and 3B are schematic diagrams for explaining airflow generated in the housing of the light irradiation device according to the first embodiment of the present invention.
  • FIG. FIG. 4 is a diagram showing a modification of the intake port of the light irradiation device according to the first embodiment of the present invention.
  • FIG. 5 is a diagram illustrating the configuration of a light irradiation device according to a second embodiment of the present invention.
  • FIG. 6 is a diagram illustrating the configuration of a light irradiation device according to a second embodiment of the present invention.
  • FIG. 7 is a schematic diagram for explaining the airflow generated inside the housing of the light irradiation device according to the second embodiment of the present invention.
  • FIG. 8 is a diagram illustrating the configuration of a light irradiation device according to a third embodiment of the present invention.
  • FIG. 9 is a diagram illustrating the configuration of a light irradiation device according to a third embodiment of the present invention.
  • 10A and 10B are schematic diagrams for explaining the airflow generated inside the housing of the light irradiation device according to the third embodiment of the present invention.
  • FIG. 1 and 2 are diagrams for explaining the configuration of the light irradiation device 1 according to the first embodiment of the present invention
  • FIG. 1(a) is a perspective view of the light irradiation device 1 according to the embodiment of the present invention.
  • 1(b) is a plan view of the light irradiation device 1 of FIG. 1(a).
  • FIG. 2(a) is a cross-sectional view along the line AA in FIG. 1(b)
  • FIG. 2(b) is a cross-sectional view along the line BB in FIG. 2(a)
  • FIG. ) is an enlarged view of part C in FIG. 2(b).
  • the light irradiation device 1 of the present embodiment is a light source device that is mounted in a printing device or the like and cures ultraviolet curable ink or ultraviolet curable resin. ) to emit linear ultraviolet light.
  • the direction in which the LED elements 210 are arranged is the X-axis direction (first direction)
  • the direction in which the LED elements 210 emit ultraviolet light is the Z-axis direction ( 3rd direction)
  • a direction orthogonal to the X-axis direction and the Z-axis direction are defined as the Y-axis direction (second direction).
  • the light irradiation device 1 of this embodiment includes a housing 100 , a light source unit 200 (light source section), a control board 300 (drive circuit), and a heat dissipation member 400 .
  • the housing 100 is a thin box-shaped member that houses the light source unit 200, the control board 300, and the heat dissipation member 400.
  • the housing 100 has a glass window 105 attached to the front surface of the housing 100 through which ultraviolet light is emitted, and a housing.
  • Two exhaust fans 110 (cooling fans) are provided on the back of the body 100 to exhaust the air in the housing 100, and the upper surface of the housing 100 has an intake port 102 ( vent) is formed. As shown in FIG.
  • the intake port 102 of this embodiment is configured by arranging seven circular through holes 102a to 102g along the Z-axis direction in 19 rows in the X-axis direction. It is The through-holes 102a-102g in odd-numbered rows are shifted in the Z-axis direction with respect to the through-holes 102a-102g in even-numbered rows, and the plurality of through-holes 102a-102g are arranged in a zigzag pattern as a whole.
  • the through holes 102a to 102d up to the fourth from the positive side in the Z-axis direction have the same hole diameter (for example, a diameter of 5 mm), and the hole diameters of the through holes 102e to 102g are larger than the hole diameters of the through holes 102a to 102d. are also gradually becoming smaller (eg, 4 mm, 3 mm, and 2 mm in diameter, respectively).
  • the intake port 102 of this embodiment is configured such that the opening area decreases from the + side toward the - side in the Z-axis direction.
  • the through holes 102a to 102d are arranged so as to face radiation fins 420, which will be described later, and the radiation fins 420 are exposed from the through holes 102a to 102d.
  • a baffle plate 107 extending from the upper surface of the housing 100 toward the end surface of the radiation fins 420 on the Z-axis direction - side. are placed.
  • the baffle plate 107 is a dogleg-shaped metal thin plate member that is arranged to face the through holes 102 e to 102 g and guides the air taken in through the through holes 102 e to 102 g to the heat radiating fins 420 .
  • the light source unit 200 includes a rectangular substrate 205 defined by the X-axis direction and the Y-axis direction, and a plurality of (for example, 100) LED elements 210 (light sources) having the same characteristics.
  • the plurality of LED elements 210 are aligned in the Z-axis direction, for example, 50 (X-axis direction) ⁇ 2 rows (Y-axis direction) at predetermined pitches on the surface of the substrate 205 . , and electrically connected to the substrate 205 .
  • the “pitch” at which the plurality of LED elements 210 are arranged means the distance between the centers of adjacent LED elements 210, and the pitch may differ between the X-axis direction and the Y-axis direction.
  • the board 205 is connected to a control board 300 (to be described later) by a cable (not shown), and each LED element 210 is supplied with a drive current from the control board 300 via the board 205 .
  • each LED element 210 When a drive current is supplied to each LED element 210, each LED element 210 emits ultraviolet light (for example, a wavelength of 365 nm) of a light amount corresponding to the drive current, and a line parallel to the X-axis direction is emitted from the light source unit 200. shaped ultraviolet light is emitted. The line-shaped ultraviolet light emitted from the light source unit 200 passes through the window 105 and is emitted toward the object to be irradiated.
  • ultraviolet light for example, a wavelength of 365 nm
  • the control board 300 has a circuit board 301 and a plurality of electronic components (not shown) arranged on one surface (Y-axis direction - side surface) of the circuit board 301.
  • the LED elements 210 of the light source unit 200 is an electronic circuit board that controls the light emission of the light irradiation device 1 as a whole.
  • the control board 300 receives a signal input by a user through a user interface (not shown), performs ON/OFF control and brightness control of the light source unit 200, and outputs error information to the outside through the user interface.
  • the heat dissipation member 400 is a member that dissipates heat emitted from the light source unit 200 .
  • the heat dissipating member 400 of this embodiment includes a rectangular plate-shaped metal (for example, copper or aluminum) heat dissipating plate 410 and the other end surface of the heat dissipating plate 410 (the surface opposite to the surface on which the light source unit 200 is mounted). ) and a plurality of radiation fins 420 integrally formed by brazing, soldering, skiving, or the like, and erected at predetermined pitches in the X-axis direction (FIGS. 2A and 2B )).
  • the “pitch” at which the plurality of radiating fins 420 stand means the distance between the centers of adjacent radiating fins 420 .
  • Radiation fins 420 are rectangular metal plates (eg, copper, aluminum, etc.) that are erected so as to protrude from radiation plate 410 in a direction opposite to the Z-axis direction, and radiate heat transferred to radiation plate 410 into the air. , metals such as iron and magnesium, and alloys containing these).
  • the pitch in the X-axis direction of the plurality of radiating fins 420 is narrower than the pitch in the X-axis direction of the plurality of LED elements 210 .
  • air from the outside is taken into the housing 100 from the intake port 102, and the taken-in air flows on the surface of each heat radiation fin 420 as cooling air.
  • the air heated by 420 is quickly exhausted by exhaust fan 110 .
  • the light source unit 200 and the heat dissipation member 400 of the present embodiment are arranged and fixed on the front side (on the + side in the Z-axis direction) in the housing 100. ing.
  • each LED element 210 is arranged at a position facing the window 105, and the end 420a of each heat dissipation fin 420 on the + side in the Y-axis direction. abuts on the top surface of the housing 100, and a space S is formed between the negative side end 420b in the Y-axis direction and the bottom surface of the housing 100.
  • a wind tunnel ⁇ is formed on the rear side of each radiation fin 420 (the negative side in the Z-axis direction) through which cooling air flows after cooling the radiation fins 420 .
  • at least the end of the control board 300 on the positive side in the Z-axis direction is disposed in the space S, and one side of the circuit board 301 (Y-axis direction A wind tunnel ⁇ is formed through which cooling air flows for cooling a plurality of electronic components (not shown) arranged on the negative side). That is, the control board 300 divides the space inside the housing 100 into two in the Y-axis direction to form the wind tunnel ⁇ (first wind tunnel) and the wind tunnel ⁇ (second wind tunnel).
  • each LED element 210 of the present embodiment the drive current supplied to each LED element 210 is adjusted so as to emit ultraviolet light with a substantially uniform amount of light.
  • Ultraviolet light has a substantially uniform light amount distribution in the X-axis direction.
  • the light source unit 200 and the heat dissipation member 400 extend in the X-axis direction, if the temperature of the LED element 210 of the light source unit 200 differs in the X-axis direction, the amount of light varies. Therefore, there is a problem that the heat radiating member 400 must be cooled uniformly and sufficiently. Therefore, in order to solve such a problem, in the present embodiment, a sufficient amount of air is supplied to the heat radiating fins 420 of the heat radiating member 400, and a sufficient wind speed is obtained.
  • the height h is higher than the height H of the radiation fins 420 in the Z-axis direction, and the total area A of the openings of the intake port 102 is configured to be larger than the area B of the ventilable region of the radiation fins 420. (details will be described later).
  • the pressure loss (intake loss) at the intake port 102 is reduced, and the heat radiating member 400 can be uniformly and sufficiently cooled.
  • FIG. 3A and 3B are schematic diagrams for explaining the airflow generated inside the housing 100.
  • FIG. 3 is a diagram in which an arrow indicating the direction of the airflow is added to FIG. 2(a).
  • the light irradiation device 1 of this embodiment includes an exhaust fan 110 on the back of the housing 100, and an air intake 102 is formed on the top of the housing 100 by a plurality of through holes 102a to 102g. It is Therefore, when the exhaust fan 110 rotates, the air inside the housing 100 is exhausted from the exhaust fan 110, so that the inside of the housing 100 becomes a negative pressure, and the air outside the housing 100 is discharged from the through holes 102a to 102g. As it is taken in, an air current indicated by solid line arrows in FIG. 3 is generated in the housing 100 . More specifically, as shown in FIG.
  • the total area A of the openings of the intake port 102 (that is, the sum of the opening areas of the plurality of through holes 102a to 102g) is the ventilation of the heat radiating fins 420. It is configured to be larger than the area B of the possible region.
  • the relationship of the total area A of the openings of the intake port 102 in this embodiment can be expressed by the following conditional expression (1).
  • the following conditional expression (2) is obtained from the relationship between the height h of the intake port 102 in the Z-axis direction and the height H of the radiation fins 420 in the Z-axis direction.
  • the diameters of the through holes 102a to 102d of the present embodiment are larger than the diameters of the through holes 102e to 102g, and the opening area is configured to decrease from the + side to the - side in the Z axis direction. Therefore, a sufficient amount of cooling air to cool the radiation fins 420 flows from the through-holes 102a to 102d (that is, over the entire height of the radiation fins 420 in the Z-axis direction) in a direction opposite to the Y-axis direction. part of it flows into the space S. Therefore, the cooling air is reliably supplied to the radiation fins 420, and the cooling air is also reliably supplied to the wind tunnel ⁇ .
  • the light irradiation device 1 of the present embodiment is a device that irradiates ultraviolet light, but is not limited to such a configuration, and irradiation light in other wavelength ranges (for example, visible light such as white light,
  • the present invention can also be applied to a device that irradiates infrared light or the like.
  • baffle plate 107 of the present embodiment is a V-shaped thin plate member, any form may be used as long as the air taken in through the through holes 102e to 102g can be guided to the heat radiating fins 420. I don't mind.
  • the through holes 102a to 102d are arranged to face the radiating fins 420, and the radiating fins 420 are exposed from the through holes 102a to 102d. It is sufficient if a sufficient amount of cooling air can be supplied, and at least a part of the through holes 102 a to 102 d are arranged so as to face the heat radiating fins 420 .
  • the inside of the housing 100 is made negative pressure by the exhaust fan 110, and the air is drawn into the housing 100 from the intake port 102.
  • an intake fan may be used instead of the exhaust fan 110 .
  • the direction of the airflow in the housing 100 is reversed, and the air is exhausted from the through holes 102a to 102g. (Intake loss) is small, and the heat radiating member 400 can be uniformly and sufficiently cooled.
  • the intake port 102 of the present embodiment is configured by arranging seven circular through holes 102a to 102g along the Z-axis direction in 19 rows in the X-axis direction, It is not limited to such a configuration, and is configured in a manner of z pieces (z is an integer of 2 or more) along the Z-axis direction and x rows (x is an integer of 2 or more) along the X-axis direction. Just do it.
  • FIG. 4 is a diagram showing a modification of the intake port 102 of this embodiment.
  • the air inlet 102 may be configured with a plurality of square through holes
  • the air inlet 102 may be configured with a plurality of hexagonal through holes.
  • the intake port 102 may be configured with a plurality of rhombus-shaped (including a square rotated by 45 degrees) through-holes.
  • FIG. 5(a) is a perspective view of the light irradiation device 2 according to the embodiment of the present invention.
  • 5(b) is a plan view of the light irradiation device 2 of FIG. 5(a).
  • 6(a) is a cross-sectional view taken along line DD of FIG. 5(b)
  • FIG. 6(b) is a cross-sectional view taken along line EE of FIG. 6(a)
  • FIG. ) is an enlarged view of part F in FIG. 6(b).
  • an intake port 102A for taking in air from the outside is formed on the upper surface and the lower surface of the housing 100A. It differs from the light irradiation device 1 of the first embodiment in that it includes a baffle plate 107A.
  • Each intake port 102A of the present embodiment is configured by arranging nine circular through holes 102aA to 102iA along the Z-axis direction in 21 rows in the X-axis direction. The odd-numbered through holes 102aA to 102iA are shifted in the Z-axis direction with respect to the even-numbered through holes 102aA to 102iA.
  • the intake port 102A of this embodiment is also configured such that the opening area decreases from the + side to the - side in the Z-axis direction.
  • the through holes 102aA to 102eA are arranged to face the heat radiation fins 420A, and the heat radiation fins 420A are exposed from the through holes 102aA to 102eA.
  • FIG. 1 shows that the intake port 102A of this embodiment is also configured such that the opening area decreases from the + side to the - side in the Z-axis direction.
  • a pair of conductors extending from the top and bottom surfaces of the housing 100A toward the end surface of the radiation fin 420A on the negative side in the Z-axis direction is provided inside the housing 100A of the present embodiment.
  • a wind plate 107A is arranged inside the housing 100A of the present embodiment.
  • Each baffle plate 107A is arranged to face the through holes 102fA to 102iA, and is configured to guide the air taken in through the through holes 102fA to 102iA to the heat radiating fins 420A.
  • the light irradiation device 2 of this embodiment includes an exhaust fan 110A inside the housing 100A.
  • the light source unit 200A includes a rectangular substrate 205A defined by the X-axis direction and the Y-axis direction, and 50 (X-axis direction) ⁇ 10 rows (Y-axis direction). and an LED element 210A arranged on a substrate 205A.
  • the heat radiation member 400A is brazed to the rectangular heat radiation plate 410A and the other end surface of the heat radiation plate 410A (the surface opposite to the surface on which the light source unit 200A is placed).
  • Each radiation fin 420A has an end portion 420aA on the positive side in the Y-axis direction facing the upper surface of the housing 100A, and an end portion 420bA on the negative side in the Y-axis direction facing the housing 100A. facing the bottom surface of the A wind tunnel ⁇ through which cooling air flows after cooling the radiation fins 420A is formed behind each radiation fin 420A (the negative side in the Z-axis direction).
  • FIG. 7 is a schematic diagram illustrating the relationship between the heat radiating member 400A and the airflow generated inside the housing 100A.
  • FIG. 7 is a diagram in which an arrow indicating the direction of the airflow is added to FIG. 6(a).
  • each intake port 102A in the Z-axis direction is set so that pressure loss (intake loss) does not occur in the through holes 102aA to 102iA. is higher than the height H (FIG. 6(b)) of the direction, and the total area A of the openings of the air inlets 102A (that is, the sum of the opening areas of the plurality of through-holes 102aA to 102iA) is enough for the heat dissipation fins 420A to ventilate. It is configured to be larger than the area B of the region. That is, as in the first embodiment, the width of the radiation fins 420A in the X-axis direction is defined as the ventilation width W (FIG. 6B), and the thickness of the radiation fins 420A in the X-axis direction is t ( 6(c)), and when the number of radiating fins 420A is n, the conditional expressions (1) and (2) are satisfied.
  • the air that has flowed between the radiation fins 420A flows through the wind tunnel ⁇ and is exhausted from the exhaust fan 110A.
  • the pressure loss (intake loss) at each intake port 102A can be reduced, and the heat dissipation member 400A can be cooled uniformly and sufficiently.
  • FIG. 8 and 9 are diagrams for explaining the configuration of the light irradiation device 3 according to the third embodiment of the present invention
  • FIG. 8(a) is a perspective view of the light irradiation device 3 according to the embodiment of the present invention.
  • 8(b) is a plan view of the light irradiation device 3 of FIG. 8(a).
  • 9(a) is a cross-sectional view taken along line GG of FIG. 8(b)
  • FIG. 9(b) is a cross-sectional view taken along line HH of FIG. 9(a)
  • FIG. ) is an enlarged view of part I in FIG. 9(b).
  • the top panel 101B of the housing 100B protrudes upward (Y-axis direction + side), and the top panel 101B protrudes inside (Y-axis direction ⁇ side).
  • the top panel 101B protrudes inside (Y-axis direction ⁇ side).
  • a filter 500 is sandwiched between the top panel 101B and the inner wall 108B so as to block the intake port 102B, which is different from the light irradiation device 1 of the first embodiment.
  • the filter 500 is, for example, a paper filter, and has a function of absorbing ink mist around the intake port 102B. According to the configuration of this embodiment, even if the light irradiation device 3 is arranged in a space filled with ink mist, the ink mist can be absorbed by the filter 500, so that the ink mist does not enter the housing 100B. Intrusion can be prevented.
  • the intake port 102B of this embodiment is configured by arranging 10 circular through-holes 102aB to 102jB along the Z-axis direction in 19 rows in the X-axis direction.
  • the odd-numbered through holes 102aB to 102jB are shifted in the Z-axis direction with respect to the even-numbered through holes 102aB to 102jB, and the sixth through-holes 102aB to 102fB from the positive side in the Z-axis direction have the same hole diameter.
  • the intake port 102B of this embodiment is also configured such that the opening area decreases from the + side to the - side in the Z-axis direction.
  • Through holes 102aB to 102jB are arranged to face filter 500, and filter 500 is exposed from through holes 102aB to 102jB. Further, as shown in FIG.
  • a baffle plate 107B extending from the inner wall 108B toward the end face of the radiation fin 420 on the Z-axis direction - side is arranged.
  • the baffle plate 107B is a dogleg-shaped metal thin plate member that is arranged to face the inner wall 108B, takes in the air from the through holes 102aB to 102jB, and guides the air that has passed through the filter 500 to the heat radiating fins 420.
  • a through hole (not shown) is formed in the inner wall 108B so that all the air that has passed through the filter 500 is guided to the air guide plate 107B through the inner wall 108B.
  • FIG. 10 is a schematic diagram explaining the airflow generated inside the housing 100B.
  • FIG. 10 is a diagram in which an arrow indicating the direction of the airflow is added to FIG. 9(a).
  • the exhaust fan 110 rotates, the air inside the housing 100B is exhausted from the exhaust fan 110, so that the pressure inside the housing 100B becomes negative. , the air outside the housing 100B is taken in through the through holes 102aB to 102jB, and air currents indicated by solid arrows in FIG. 10 are generated in the housing 100B. More specifically, as shown in FIG. 10, air is taken in from through holes 102aB to 102jB in a direction opposite to the Y-axis direction, and the taken-in air passes through filter 500 and inner wall 108B to baffle plate 107B. , and flow between the heat radiating fins 420 .
  • the configuration of the present embodiment can also reduce the pressure loss (intake loss) at each intake port 102B (that is, the through holes 102aB to 102jB) and the filter 500, as in the first embodiment. , the heat radiating member 400 can be uniformly and sufficiently cooled.

Abstract

L'objectif de la présente invention est de fournir un dispositif d'émission de lumière qui élimine l'apparition d'une perte de pression au niveau d'évents et qui peut refroidir efficacement une unité de dissipation de chaleur et une source de lumière.　Un dispositif d'émission de lumière (1) qui émet une lumière linéaire comprend : une unité de source de lumière (200) comportant une pluralité de sources de lumière sur un substrat ; une unité de dissipation de chaleur (400) qui comporte une pluralité d'ailettes de dissipation de chaleur (420) et qui est thermiquement couplée au côté de surface arrière du substrat ; un boîtier (100) qui reçoit l'unité de dissipation de chaleur et qui forme un tunnel réfrigérant dans lequel circule de l'air de refroidissement servant à refroidir les ailettes de dissipation de chaleur ; et un ventilateur de refroidissement (110) qui sert à générer l'air de refroidissement, et le dispositif est caractérisé en ce qu'au moins une surface latérale du boîtier comporte des évents formés de façon à évacuer l'air de refroidissement vers l'extérieur par la pluralité d'ailettes de dissipation de chaleur et en ce que les relations A > H×(W-(t×n)) et h > H sont satisfaites, A représentant la superficie totale des ouvertures des évents, h représentant la hauteur des évents, H représentant la hauteur de la pluralité d'ailettes de dissipation de chaleur, W représentant la largeur avec laquelle la pluralité d'ailettes de dissipation de chaleur sont formées, t représentant l'épaisseur de chaque ailette de dissipation de chaleur, et n représentant le nombre d'ailettes de la pluralité d'ailettes de dissipation de chaleur.
PCT/JP2022/012302 2021-03-31 2022-03-17 Dispositif d'émission de lumière WO2022209959A1 (fr)

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JP2015103335A (ja) * 2013-11-22 2015-06-04 ウシオ電機株式会社 光源装置
JP2015149415A (ja) * 2014-02-06 2015-08-20 パナソニック デバイスＳｕｎｘ株式会社 紫外線照射ヘッド及び紫外線照射装置
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