WO2020251048A1 - 光源装置 - Google Patents
光源装置 Download PDFInfo
- Publication number
- WO2020251048A1 WO2020251048A1 PCT/JP2020/023311 JP2020023311W WO2020251048A1 WO 2020251048 A1 WO2020251048 A1 WO 2020251048A1 JP 2020023311 W JP2020023311 W JP 2020023311W WO 2020251048 A1 WO2020251048 A1 WO 2020251048A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light source
- rotation speed
- fan
- control unit
- light
- Prior art date
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- 238000001816 cooling Methods 0.000 claims abstract description 45
- 230000007704 transition Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
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- 230000008569 process Effects 0.000 description 31
- 230000004048 modification Effects 0.000 description 15
- 238000012986 modification Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 6
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- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/61—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00212—Controlling the irradiation means, e.g. image-based controlling of the irradiation zone or control of the duration or intensity of the irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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
-
- 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
- B41F23/044—Drying sheets, e.g. between two printing stations
- B41F23/045—Drying sheets, e.g. between two printing stations by radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00218—Constructional details of the irradiation means, e.g. radiation source attached to reciprocating print head assembly or shutter means provided on the radiation source
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/377—Cooling or ventilating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a light source device that emits light, and more particularly to a light source device including a cooling fan that cools heat emitted from the light source.
- a printing device that prints using UV ink that is cured by irradiation with ultraviolet light.
- a printing device is provided with an ultraviolet irradiation device, and is configured to eject ink from a nozzle of a head onto a medium and then irradiate dots formed on the medium with ultraviolet light.
- an ultraviolet irradiation device a large number of ultraviolet LEDs are used as a light source (for example, Patent Document 1).
- the ultraviolet irradiation device described in Patent Document 1 includes an ultraviolet irradiation head having a large number of ultraviolet LED elements as a light source and a controller for controlling lighting of the LED elements.
- an ultraviolet irradiation head having a large number of ultraviolet LED elements as a light source and a controller for controlling lighting of the LED elements.
- the LED element is used as the light source in this way, since most of the input electric power becomes heat, there arises a problem that the luminous efficiency and the life are lowered due to the heat generated by the LED element itself. Further, such a problem becomes more serious in the case of a device equipped with a large number of LED elements, such as the ultraviolet irradiation device of Patent Document 1, because the number of LED elements serving as a heat source increases.
- the ultraviolet irradiation device of Patent Document 1 includes a heat sink that efficiently transfers heat generated in the LED element and a plurality of fan devices that supply cooling air to the heat sink, and drives the fan device at the same time as the LED element is turned on. At the same time that the LED element is turned off, the fan device is stopped to suppress the heat generation of the LED element.
- the configuration of Patent Document 1 is such that the fan device is driven at the same time as the LED element is turned on and the fan device is stopped at the same time when the LED element is turned off. Therefore, when the LED element is turned off, heat is generated inside the housing of the ultraviolet irradiation device. There is a problem that the housing does not cool at all even though the LED element is turned off due to muffled. Further, since the fan device always rotates at 100% rotation speed when the LED element is lit, there is a problem that surrounding dust and the like are easily sucked from the intake port (or the fan device), and the risk of failure increases. Further, if the time for the fan device to rotate at 100% rotation speed becomes long, there is a problem that the life of the fan device is shortened.
- the present invention has been made in view of the above circumstances, and suppresses heat from being trapped inside the housing when the LED element is turned off, and also has a risk of sucking dust or the like into the housing and the life of the fan device.
- An object of the present invention is to provide a light source device capable of reducing a risk.
- the light source device of the present invention includes a light source, a light source control unit that controls on / off of the light source and the amount of light, a cooling fan that cools the light source, and fan control that controls the rotation speed of the cooling fan.
- the fan control unit controls the cooling fan to have a first rotation speed according to the amount of light of the light source when the light source is on, and when the light source is turned off, a predetermined value is provided. It is characterized in that the cooling fan is controlled to have a second rotation speed lower than the first rotation speed after waiting for a standby time.
- the cooling fan keeps rotating, so that heat does not stay inside the housing. Further, since the rotation speed of the cooling fan is lowered while the light source is off, the risk of sucking dust or the like into the housing and the risk of the life of the cooling fan are reduced.
- the light source device of the present invention is based on a light source, a light source control unit that controls on / off of the light source, a cooling fan that cools the light source, and a cooling fan based on the on / off of the light source.
- the fan control unit includes a fan control unit that controls the rotation speed of the light source, and controls the cooling fan to have the first rotation speed when the light source is turned on, and a predetermined value when the light source is turned off. It is characterized in that the cooling fan is controlled to have a second rotation speed lower than the first rotation speed after waiting for a standby time.
- the light source device of the present invention includes a light source, a light source control unit that controls on / off of the light source, a temperature sensor that detects the temperature of the light source, a cooling fan that cools the light source, and a light source.
- a fan control unit that controls the rotation speed of the cooling fan based on the on / off and the detection result of the temperature sensor is provided, and the fan control unit sets the cooling fan to the first rotation speed when the light source is turned on.
- the light source is turned off, wait for the detection result of the temperature sensor to fall below a predetermined value, and then set the cooling fan to a second rotation speed lower than the first rotation speed. It is characterized by controlling.
- the fan control unit controls the rotation speed of the cooling fan so as to satisfy the following conditional expression (2) when the first rotation speed is R1 and the light amount of the light source is P.
- R1 a ⁇ P + b (a and b are arbitrary constants) ...
- the second rotation speed is set to approximately 40% of the maximum rotation speed of the cooling fan.
- the light source device can reduce the risk of sucking dust or the like into the housing and the risk of the life of the fan device without heat being trapped in the housing when the LED element is turned off. Is realized.
- FIG. 1 is an external view of a light irradiation device according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an internal configuration of a light irradiation device according to an embodiment of the present invention.
- FIG. 3 is a block diagram illustrating an electrical connection of the internal configuration of the light irradiation device according to the embodiment of the present invention.
- FIG. 4 is a flowchart of a control program executed by the light irradiation device according to the embodiment of the present invention.
- FIG. 5 is a timing chart corresponding to the flowchart of FIG.
- FIG. 6 is a block diagram illustrating an electrical connection of the internal configuration of the light irradiation device according to the first modification of the present invention.
- FIG. 7 is a flowchart of a control program executed by the light irradiation device according to the modified example of the present invention.
- FIG. 8 is a flowchart of a control program executed by the light irradiation device according to the second modification of the present invention.
- FIG. 9 is a timing chart corresponding to the flowchart of FIG.
- FIG. 1 is an external view of the light irradiation device 1 (light source device) according to the embodiment of the present invention
- FIG. 1 (a) is a plan view of the light irradiation device 1 according to the embodiment of the present invention.
- 1 (b) is a right side view of the light irradiation device 1 of FIG. 1 (a)
- FIG. 1 (c) is a bottom view of the light irradiation device 1 of FIG. 1 (a).
- 1 (d) is a front view of the light irradiation device 1 of FIG. 1 (a).
- the light irradiation device 1 of the present embodiment is a light source device mounted on a printing device or the like to cure an ultraviolet curable ink or an ultraviolet curable resin, is arranged above an irradiation target object, and has a line with respect to the irradiation target object. It emits ultraviolet light.
- the direction in which the LED (Light Emitting Diode) element 210 described later emits ultraviolet light is the X-axis direction
- the arrangement direction of the LED elements 210 is the Y-axis direction.
- the directions orthogonal to the X-axis direction and the Y-axis direction will be defined as the Z-axis direction and will be described.
- the light irradiation device 1 of the present embodiment has a thin box-shaped case 100 (housing) accommodating a light source unit 200, a heat radiating member 400, and the like inside, and is attached to the front surface of the case 100 and is ultraviolet. It includes a glass window 105 from which light is emitted, and three fans 110 (cooling fans) provided on the back surface of the case 100 and exhausting the air inside the case 100. Further, on the bottom surface of the case 100, an intake port 102 that takes in air from the outside is formed in the case 100.
- FIG. 2 is a diagram for explaining the internal configuration of the light irradiation device 1 according to the embodiment of the present invention
- FIG. 2A is a perspective perspective view of the light irradiation device 1 when viewed in a plan view.
- FIG. 2B is a side perspective view of the light irradiation device 1 when viewed from the right side.
- FIG. 2C is a front perspective view of the light irradiation device 1 when viewed from the front.
- FIG. 3 is a block diagram illustrating an electrical connection of the internal configuration of the light irradiation device 1 according to the embodiment of the present invention.
- the light irradiation device 1 of the present embodiment includes a light source unit 200, a control board 300, a heat radiating member 400, and the like inside the case 100.
- the light source unit 200 includes a rectangular substrate 205 defined in the Y-axis direction and the Z-axis direction, and 16 LED elements 210 having the same characteristics.
- the 16 LED elements 210 are arranged in a row on the surface of the substrate 205 at predetermined intervals in the Y-axis direction with the optical axes aligned in the X-axis direction, and are electrically connected to the substrate 205. There is.
- the board 205 is connected to the LED drive circuit 330 of the control board 300 by a cable (not shown), and the drive current from the LED drive circuit 330 is supplied to each LED element 210 via the board 205. (Fig. 3).
- each LED element 210 When a drive current is supplied to each LED element 210, ultraviolet light (for example, a wavelength of 365 nm) having an amount of light corresponding to the drive current is emitted from each LED element 210, and a line parallel to the Y-axis direction is emitted from the light source unit 200. Ultraviolet light is emitted.
- Each LED element 210 of the present embodiment has a drive current adjusted to be supplied to each LED element 210 so as to emit ultraviolet light having a substantially uniform amount of light, and has a line shape emitted from the light source unit 200.
- the ultraviolet light of the above has a substantially uniform light amount distribution in the Y-axis direction.
- the user can adjust the amount of ultraviolet light emitted from the light source unit 200 by operating the operation unit 500 (not shown in FIGS. 1 and 2) connected to the control board 300. (Details will be described later).
- the heat radiating member 400 is a member that radiates heat generated from the light source unit 200.
- the heat radiating member 400 of the present embodiment is arranged in close contact with the back surface of the substrate 205 of the light source unit 200, and has a plate-shaped base plate 410 that conducts heat generated by each LED element 210 and the X-axis direction from the base plate 410. It is composed of heat-dissipating fins 420 that are erected in opposite directions and dissipate heat transmitted to the base plate 410 into the air (FIGS. 2A and 2B).
- the fan 110 rotates, the air inside the case 100 is exhausted from the fan 110, and the outside air is taken in from the intake port 102. Then, an air flow is generated so that the air taken in from the intake port 102 flows on the surface of the heat radiation fin 420, and the heat radiation fin 420 is efficiently cooled.
- control board 300 is a circuit board that includes a control unit 310, a storage unit 320, an LED drive circuit 330, and a fan drive circuit 340, and controls the light source unit 200 and the fan 110. is there.
- the control unit 310 is composed of a CPU that executes logical operations, a RAM that temporarily stores data, and the like, and has a function of controlling the entire light irradiation device 1.
- the control unit 310 is electrically connected to the storage unit 320, the LED drive circuit 330, the fan drive circuit 340, and the operation unit 500, and is stored in the storage unit 320 when the power is input to the light irradiation device 1.
- the control program is read and each of these parts is controlled. That is, the control unit 310 of the present embodiment has a function of controlling the LED drive circuit 330 (light source control unit) and a function of controlling the fan drive circuit 340 (fan control unit).
- the storage unit 320 is a so-called non-volatile memory that stores the control program executed by the control unit 310.
- the operation unit 500 is a so-called user interface in which input from the user is performed, and the amount of ultraviolet light emitted from the light source unit 200 can be adjusted, the on / off of the ultraviolet light, and the like can be set via the operation unit 500. It is configured as follows.
- the LED drive circuit 330 is a circuit that is electrically connected to the light source unit 200 and supplies a drive current to each LED element 210.
- the LED drive circuit 330 turns on / off the LED element 210 according to an instruction (signal) from the control unit 310, and outputs a predetermined drive current to each LED element 210.
- the fan drive circuit 340 is a circuit that is electrically connected to the fan 110 and supplies drive power to the fan 110.
- the fan drive circuit 340 turns the fan 110 on and off according to an instruction (signal) from the control unit 310, and rotates the fan 110 at a predetermined rotation speed.
- the control program is a process that is read from the storage unit 320 and executed by the control unit 310 when the power is input to the light irradiation device 1.
- FIG. 5 is a timing chart corresponding to each step of the control program of FIG. 4, and shows the state of the light source unit 200 and the fan 110 at each step of the control program.
- step S101 determines whether or not the user has turned on the main switch of the light irradiation device 1 via the operation unit 500. If it is determined that the main switch is not ON (step S101: NO), step S101 is repeated until the main switch is ON, and the light source unit 200 and the fan 110 are turned off (that is, the amount of ultraviolet light: 0, the fan rotation). The state of number: 0) is maintained (FIG. 5: t0 to t1). Then, when the main switch is turned on (step S101: YES), the process proceeds to step S103.
- step S103 the control unit 310 controls the fan drive circuit 340 and drives the fan 110 at a predetermined rotation speed R2 (for example, 40% of the maximum rotation speed (rpm)) (FIG. 5: t1). ..
- a predetermined rotation speed R2 for example, 40% of the maximum rotation speed (rpm)
- step S105 the control unit 310 determines whether or not the user has turned on the light source switch (switch for operating the light source unit 200) via the operation unit 500.
- steps S103 and S105 are repeated until the light source switch is turned on (FIGS. 5: t1 to t2), and when the light source switch is turned on (step S105). : YES)
- the process proceeds to step S107.
- step S107 the control unit 310 controls the LED drive circuit 330 and applies a drive current to each LED element 210 of the light source unit 200 so that the ultraviolet light emitted from the light source unit 200 has a predetermined light amount P (W).
- Supply Fig. 5: t2
- step S109 the process proceeds to step S109.
- step S109 the control unit 310 controls the fan drive circuit 340 and drives the fan 110 at a predetermined rotation speed R1 (for example, 90% of the maximum rotation speed (rpm)) higher than the rotation speed R2.
- a predetermined rotation speed R1 for example, 90% of the maximum rotation speed (rpm)
- step S111 the control unit 310 determines whether or not the user has turned off the light source switch via the operation unit 500. If it is determined that the light source switch is not turned off (step S111: NO), step S111 is repeated until the light source switch is turned off, and the light source unit 200 and the fan 110 are turned on (that is, the amount of ultraviolet light: P, fan rotation). The state of number: R1) is maintained (FIG. 5: t2 to t3). Then, when the light source switch is turned off (step S111: YES), the process proceeds to step S113.
- step S113 the control unit 310 controls the LED drive circuit 330 to turn off the ultraviolet light emitted from the light source unit 200 (FIG. 5: t3).
- step S115 the process proceeds to step S115.
- step S115 the control unit 310 waits for a predetermined time td (for example, 2 seconds) (FIG. 5: t4), and the process proceeds to step S117.
- a predetermined time td for example, 2 seconds
- step S117 the control unit 310 determines whether or not the user has turned on the light source switch via the operation unit 500. If it is determined that the light source switch is not ON (step S117: NO), the process proceeds to step S119, and if it is determined that the light source switch is ON (step S117: YES), the process proceeds to step S107. move on.
- step S121 the control unit 310 confirms the setting of the fan drive circuit 340 and determines whether or not the rotation speed of the fan 110 has reached the rotation speed R2. If the rotation speed of the fan 110 is not the rotation speed R2 (step S121: NO), steps S117 to S121 are repeated (FIG. 5: t4 to t5), and the rotation speed of the fan 110 becomes the rotation speed R2. If so (step S121: YES), the process proceeds to step S123 (FIG. 5: t5).
- step S123 the control unit 310 determines whether or not the user has turned off the main switch via the operation unit 500. If it is determined that the main switch is not turned off (step S123: NO), the process proceeds to step S103, and if it is determined that the main switch is turned off (step S123: YES), the control unit 310 The fan 110 is stopped (step S125), and the control program ends.
- the light source unit 200 emits a predetermined amount of light P.
- the ultraviolet light is emitted, and the fan 110 is driven at the rotation speed R1 (FIG. 5: t2 to t3).
- the rotation speed of the fan 110 gradually decreases after waiting for a predetermined time td (FIG. 5: t3 to t5), and the fan 110 waits at the rotation speed R2 (FIG. 5). 5: t5 to t6).
- the fan 110 continues to rotate even after the ultraviolet light is turned off, heat does not stay in the case 100. Further, when the ultraviolet light is turned off and the fan 110 is in the standby state, the rotation speed of the fan 110 is lowered, so that the risk of sucking dust or the like into the case 100 and the risk of the life of the fan 110 are reduced.
- t6 to t9 show a state in which the user turns on the light source switch via the operation unit 500 while the rotation speed of the fan 110 is being reduced in step S119. That is, in FIG. 4, when the ON of the light source switch is detected at a time T2 shorter than the transition time T1 while repeating steps S117 to S121 (FIG. 5: t8 to t9), the rotation speed of the fan 110 is the rotation speed. Since it has not decreased to R2, the process proceeds to step S107 (step S117: YES).
- the control unit 310 controls the LED drive circuit 330 and supplies a drive current to each LED element 210 of the light source unit 200 so that the ultraviolet light emitted from the light source unit 200 has a predetermined amount of light P (FIG. 5). : T9).
- the control unit 310 controls the LED drive circuit 330 and supplies a drive current to each LED element 210 of the light source unit 200 so that the ultraviolet light emitted from the light source unit 200 has a predetermined amount of light P (FIG. 5). : T9).
- the ON of the light source switch is detected during the transition time T1
- the processing of steps S117 to S121 is interrupted
- the light source unit 200 emits ultraviolet light having a predetermined amount of light P, and the fan.
- the 110 is driven by the rotation speed R1 (FIG. 5: t9).
- t9 to t11 show a state in which the user turns on the light source switch via the operation unit 500 while waiting for td for a predetermined time in step S115. That is, in step S115 of FIG. 4, if ON of the light source switch is detected while waiting for td for a predetermined time, the process proceeds from step S117 to step S107 (that is, it does not proceed to step S119). Then, the control unit 310 controls the LED drive circuit 330 and supplies a drive current to each LED element 210 of the light source unit 200 so that the ultraviolet light emitted from the light source unit 200 has a predetermined light amount P (FIG. 5). : T11).
- the processes of steps S117 to S121 are not performed (that is, the rotation speed of the fan 110 decreases).
- the light source unit 200 emits ultraviolet light having a predetermined amount of light P, and the fan 110 is driven to maintain the rotation speed R1 (FIG. 5: t11).
- the rotation speed R2 has been described as being 40% of the maximum rotation speed, but the present invention is not limited to such a configuration, and the heat generation amount and heat dissipation of the light source unit 200 are not limited. It can be appropriately set depending on the cooling capacity of the member 400 and the fan 110.
- step S115 of the present embodiment it has been described as waiting for a predetermined time td (for example, 2 seconds), but the present invention is not limited to such a configuration, and the predetermined time td generates heat of the light source unit 200. It can be appropriately set depending on the amount, the cooling capacity of the heat radiating member 400 and the fan 110, and the like.
- a predetermined time td for example, 2 seconds
- the light irradiation device 1 of the present embodiment has been described as having the heat radiating member 400 inside the case 100, it is sufficient that the light source unit 200 can be cooled by the fan 110, and the heat radiating member 400 is not always necessary.
- FIG. 6 is a block diagram illustrating an electrical connection of the internal configuration of the light irradiation device 1A according to the first modification of the present invention. Further, FIG. 7 is a flowchart of a control program executed by the control unit 310 of this modification.
- the light irradiation device 1A of the present modification has a temperature sensor 600 for detecting the temperature of the light source unit 200, and has a step S116 instead of the step S115 of the control program of the present embodiment. Is different from the configuration of this embodiment.
- the control unit 310 waits until the detection result of the temperature sensor 600 becomes a predetermined value (for example, 40 °) or less (S116: NO), when the detection result of the temperature sensor 600 becomes equal to or less than a predetermined value, the rotation speed of the fan 110 is gradually reduced (steps S117 to S121).
- the light source unit 200 can be reliably cooled by controlling the rotation speed of the fan 110 based on the detection result of the temperature sensor 600.
- FIG. 8 is a flowchart of a control program executed by the control unit 310 of the light irradiation device 1B (not shown in FIG. 8) according to the second modification of the present invention.
- FIG. 9 is a timing chart corresponding to each step of the control program of FIG. 8, and shows the state of the light source unit 200 and the fan 110 at each step of the control program.
- the configuration of the light irradiation device 1B according to this modification is the same as that of the light irradiation device 1 of the present embodiment, and only the control program is different.
- control program of the light irradiation device 1B of the present modification has the light irradiation device 1 of the present embodiment in that step S110a, step S110b and step S110c are provided between steps S109 and S101. It is different from the control program of.
- step S110a the control unit 310 determines whether or not the user has performed an operation of changing the light intensity via the operation unit 500 (that is, whether or not an operation of changing the light intensity P has been performed). If it is determined that the light intensity change operation has not been performed (step S110a: NO), the process proceeds to step S111, and if it is determined that the light intensity change operation has been performed (step S110a: YES), the process proceeds to step S111. Proceed to S110b.
- step S110b the control unit 310 controls the LED drive circuit 330 based on the user operation input to the operation unit 500, and the ultraviolet light emitted from the light source unit 200 has a predetermined amount of light P'(“ P'” is , The amount of light after the change) is supplied to each LED element 210 of the light source unit 200 (FIG. 9: t2a).
- P' “ P'” is , The amount of light after the change
- step S110c the process proceeds to step S111.
- step S111 the control unit 310 determines whether or not the user has turned off the light source switch via the operation unit 500. If it is determined that the light source switch is not turned off (step S111: NO), the process returns to step S109, and the processes from step S110a to step S110c are repeated (FIGS. 9: t2a to t3). Then, when the light source switch is turned off (step S111: YES), the process proceeds to step S113.
- the light amount P is changed based on the user operation, and the changed light amount P'is further changed.
- the rotation speed R1 of the fan 110 is also changed to R1'in response (FIG. 9: t2a to t3).
- the rotation speed of the fan 110 gradually decreases after waiting for a predetermined time td (FIG. 9: t3 to t5), and the fan 110 waits at the rotation speed R2 (FIG. 9). 9: t5 to t6).
- Light irradiation device 1A Light irradiation device 1B: Light irradiation device 100: Case 102: Intake port 105: Window 110: Fan 200: Light source unit 205: Board 210: LED element 300: Control board 310: Control unit 320: Storage unit 330: LED drive circuit 340: Fan drive circuit 400: Heat dissipation member 410: Base plate 420: Heat dissipation fin 500: Operation unit 600: Temperature sensor
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Abstract
Description
(R2-R1)/T=k(kは、任意の定数)・・・(1)
また、この場合、ファン制御部は、移行時間内に光源がオンした場合、移行時間の経過を待たずに、冷却ファンが第1の回転数となるように制御することが望ましい。
R1=a・P+b(a、bは、任意の定数)・・・(2)
(R2-R1)/T=k(kは、任意の定数)・・・(1)
ステップS119の処理が終了すると、処理はステップS121に進む。
R1=a・P+b(a、bは、任意の定数)・・・(2)
また、必ずしも回転数R1と光量Pは比例関係にある必要はなく、回転数R1が所定の回転数に設定されてもよい。
図6は、本発明の第1の変形例に係る光照射装置1Aの内部構成の電気的な接続を説明するブロック図である。また、図7は、本変形例の制御部310で実行される制御プログラムのフローチャートである。
図8は、本発明の第2の変形例に係る光照射装置1B(図8において不図示)の制御部310で実行される制御プログラムのフローチャートである。また、図9は、図8の制御プログラムの各ステップに対応するタイミングチャートであり、制御プログラムの各ステップにおける光源ユニット200とファン110の様子を示している。なお、本変形例に係る光照射装置1Bの構成は、本実施形態の光照射装置1と同一であり、制御プログラムのみ異なるものである。
1A :光照射装置
1B :光照射装置
100 :ケース
102 :吸気口
105 :窓部
110 :ファン
200 :光源ユニット
205 :基板
210 :LED素子
300 :制御基板
310 :制御部
320 :記憶部
330 :LED駆動回路
340 :ファン駆動回路
400 :放熱部材
410 :ベースプレート
420 :放熱フィン
500 :操作部
600 :温度センサ
Claims (7)
- 光源と、
前記光源のオン/オフ及び光量を制御する光源制御部と、
前記光源を冷却する冷却ファンと、
前記冷却ファンの回転数を制御するファン制御部と、
を備え、
前記ファン制御部は、
前記光源がオンしているときに、前記冷却ファンが前記光源の光量に応じた第1の回転数となるように制御し、
前記光源がオフしたときに、所定の待機時間を待って、前記冷却ファンが前記第1の回転数よりも低い第2の回転数となるように制御する
ことを特徴とする光源装置。 - 光源と、
前記光源のオン/オフを制御する光源制御部と、
前記光源を冷却する冷却ファンと、
前記光源のオン/オフに基づいて、前記冷却ファンの回転数を制御するファン制御部と、
を備え、
前記ファン制御部は、
前記光源がオンしたときに、前記冷却ファンを第1の回転数となるように制御し、
前記光源がオフしたときに、所定の待機時間を待って、前記冷却ファンを前記第1の回転数よりも低い第2の回転数となるように制御する
ことを特徴とする光源装置。 - 光源と、
前記光源のオン/オフを制御する光源制御部と、
前記光源の温度を検出する温度センサと、
前記光源を冷却する冷却ファンと、
前記光源のオン/オフ及び前記温度センサの検出結果に基づいて、前記冷却ファンの回転数を制御するファン制御部と、
を備え、
前記ファン制御部は、
前記光源がオンしたときに、前記冷却ファンを第1の回転数となるように制御し、
前記光源がオフしたときに、前記温度センサの検出結果が所定値以下となるのを待って、前記冷却ファンを前記第1の回転数よりも低い第2の回転数となるように制御する
ことを特徴とする光源装置。 - 前記ファン制御部は、前記第1の回転数をR1、前記第2の回転数をR2、前記第1の回転数から前記第2の回転数までの移行時間をTとしたときに、以下の条件式(1)を満たすように前記冷却ファンの回転数を制御することを特徴とする請求項1から請求項3のいずれか一項に記載の光源装置。
(R2-R1)/T=k(kは、任意の定数)・・・(1) - 前記ファン制御部は、前記移行時間内に前記光源がオンした場合、前記移行時間の経過を待たずに、前記冷却ファンが前記第1の回転数となるように制御することを特徴とする請求項4に記載の光源装置。
- 前記ファン制御部が、前記第1の回転数をR1、前記光源の光量をPとしたときに、以下の条件式(2)を満たすように前記冷却ファンの回転数を制御することを特徴とする請求項1から請求項5のいずれか一項に記載の光源装置。
R1=a・P+b(a、bは、任意の定数)・・・(2) - 前記第2の回転数が、前記冷却ファンの最大回転数の略40%に設定されていることを特徴とする請求項1から請求項6のいずれか一項に記載の光源装置。
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EP20823150.6A EP3984750A4 (en) | 2019-06-13 | 2020-06-12 | LIGHT SOURCE DEVICE |
US17/618,422 US11674680B2 (en) | 2019-06-13 | 2020-06-12 | Light source device |
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