JP5652944B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device using an LED as a light source, and more particularly to a water-cooled LED lighting device that radiates heat of an LED by a refrigerant liquid.

  In an LED lighting device using an LED as a light source, heat is generated as the LED emits light, and the luminous efficiency decreases as the temperature of the LED increases. In order to prevent such a decrease in luminous efficiency, it is necessary to dissipate the heat of the LED, and as a heat dissipating method, an air cooling method that dissipates the heat of the LED by cooling air and an LED disposed near the LED There is a water-cooled type in which the heat of the LED is dissipated by flowing a refrigerant liquid through a pipe or the like. In general, it is known that the water-cooled type has higher heat dissipation efficiency than the air-cooled type.

  Patent Document 1 discloses an LED lighting device that dissipates heat of an LED by a water cooling method. The heat dissipating mechanism of the conventional LED lighting device includes a first circulation channel for circulating the refrigerant liquid through the LED, a first circulation pump disposed in the first circulation channel, and a cooling water supply. A cooling water supply source, a second circulation passage for circulating cooling water from the cooling water supply source, a second circulation pump disposed in the second circulation passage, and a refrigerant flowing through the first circulation passage A heat exchanger for exchanging heat between the liquid and the cooling water flowing through the second circulation channel. The first and second circulation pumps are composed of, for example, an emperor type or piston type pump. The refrigerant liquid cooled by the heat exchange in the heat exchanger flows through the first circulation channel, so that the heat of the LED is radiated.

JP 2009-291995 A

  However, in the conventional LED lighting device as described above, the heat dissipation mechanism is enlarged due to components such as the first and second circulation pumps, the heat exchanger, and the cooling water supply source, so that the entire device is enlarged. In addition, there is a problem that it is difficult to adopt the above-described conventional heat dissipation mechanism for a small LED lighting device (for example, an ultraviolet irradiation device).

  Further, in the small LED lighting device, the first circulation flow path for circulating the refrigerant liquid through the LED has a relatively small diameter (for example, about 1 to 2 mm) and a long length (for example, about 100 to 200 cm). The first circulation pump using the conventional heat dissipation mechanism has a problem that it is difficult to efficiently apply the discharge force to the first circulation channel having such a small diameter and a long length. In order to solve this, a method of increasing the discharge capacity of the first circulation pump is conceivable. However, in such a method, the first circulation pump is enlarged and the entire apparatus is enlarged, and the first circulation is increased. Since the discharge force of the pump is dispersed in parts other than the first circulation flow path, for example, the strength of the connection portion of the first circulation pump and the first circulation flow path must be increased, and the apparatus becomes large. turn into. Further, when the pressure in the first circulation flow path increases, the first circulation pump may stop due to its own discharge force.

  The objective of this invention is providing the LED lighting apparatus provided with the water-cooling type thermal radiation mechanism suitable for a small LED lighting apparatus.

In the LED lighting device according to claim 1 of the present invention, the light source means, the refrigerant liquid supply means for supplying the refrigerant liquid for cooling the light source means, and the refrigerant liquid from the refrigerant liquid supply means Refrigerant liquid circulating means for circulating through the light source means,
The light source means includes an LED and a heat radiation channel for radiating heat of the LED, and the refrigerant liquid supply means includes first and second chambers in which refrigerant liquid is stored, the first and second A communication channel that communicates the second chamber with each other; a check valve that is disposed in the communication channel and blocks the flow of the refrigerant liquid from the first chamber to the second chamber; and the first chamber A compressed air supply means for supplying compressed air; and an on-off valve for switching communication between the interior of the first chamber and the atmosphere, and the refrigerant liquid circulation means is connected to the first chamber. A first refrigerant liquid supply channel for supplying refrigerant liquid to the heat dissipation channel, and a second refrigerant liquid supply channel for supplying refrigerant liquid from the heat dissipation channel to the second chamber And the interior of the second chamber is configured to communicate with the atmosphere. It has been,
When the on-off valve is held in a closed state, the interior of the first chamber is shut off from the atmosphere, and the refrigerant liquid in the first chamber is changed to the first refrigerant by the pressure of the compressed air supplied to the first chamber. The refrigerant is supplied to the heat radiating flow path through the liquid supply flow path, and the refrigerant liquid from the heat radiating flow path is supplied to the second chamber through the second refrigerant liquid supply flow path. Is maintained in an open state, the interior of the first chamber communicates with the atmosphere, the refrigerant liquid in the second chamber flows into the first chamber through the communication channel , and the second chamber is in the first chamber. It is arranged above the chamber .

In the LED lighting device according to claim 2 of the present invention, a light source means, a refrigerant liquid supply means for supplying a refrigerant liquid for cooling the light source means, and a refrigerant liquid from the refrigerant liquid supply means Refrigerant liquid circulation means for circulating the light through the light source means,
The light source means includes an LED and a heat radiation channel for radiating heat of the LED, and the refrigerant liquid supply means includes first and second chambers in which refrigerant liquid is stored, the first and second Compressed air supply means for supplying compressed air to the second chamber, switching for switching between communication and blocking between the inside of the first chamber and the atmosphere, and communication and blocking between the inside of the second chamber and the atmosphere And the refrigerant liquid circulation means includes: a first refrigerant liquid supply channel that communicates the interior of the first chamber and the heat dissipation channel; the interior of the second chamber; and the heat dissipation channel. A second refrigerant liquid supply flow path that communicates with
When compressed air from the compressed air supply means is supplied to the first chamber in a state where the inside of the first chamber is blocked from the atmosphere by the switching means and the inside of the second chamber is communicated with the atmosphere. The refrigerant liquid in the first chamber is supplied to the second chamber through the first refrigerant liquid supply flow path, the heat radiation flow path, and the second refrigerant liquid supply flow path. When compressed air from the compressed air supply means is supplied to the second chamber in a state where the interior of the first chamber is communicated with the atmosphere and the interior of the second chamber is blocked from the atmosphere, the second chamber The refrigerant liquid is supplied to the first chamber through the second refrigerant liquid supply channel, the heat radiation channel, and the first refrigerant liquid supply channel.

Further, in the LED lighting device according to claim 3 of the present invention, the switching unit is configured such that the inside of the first chamber communicates with the atmosphere and the interior of the first chamber communicates with the compressed air supply unit. A first three-way valve that is switched to a state in which the interior of the second chamber communicates with the atmosphere, and a second three-way valve that is switched to a state in which the interior of the second chamber communicates with the compressed air supply means. , And
The first three-way valve communicates the interior of the first chamber with the compressed air supply means and the second three-way valve communicates with the atmosphere of the second chamber from the compressed air supply means. When compressed air is supplied to the first chamber, the refrigerant liquid in the first chamber passes through the first refrigerant liquid supply flow path, the heat dissipation flow path, and the second refrigerant liquid supply flow path. And the first three-way valve communicates the interior of the first chamber with the atmosphere and the second three-way valve communicates the interior of the second chamber with the compressed air supply means. When the compressed air from the compressed air supply means is supplied to the second chamber, the refrigerant liquid in the second chamber is supplied to the second refrigerant liquid supply channel, the heat dissipation channel, and the first refrigerant liquid supply. The first cha through the flow path Characterized in that it is delivered to the server.

Further, in the LED lighting device according to claim 4 of the present invention, the switching means includes an open state in which the interior of the first chamber is communicated with the atmosphere and a closed state in which the interior of the first chamber is blocked from the atmosphere. A first on-off valve that is held in an open state, an open state in which the inside of the second chamber communicates with the atmosphere, and a second on-off valve that is held in a closed state in which the inside of the second chamber is blocked from the atmosphere. And the compressed air supply means includes first compressed air supply means for supplying compressed air to the first chamber, and second compressed air supply means for supplying compressed air to the second chamber. And
When compressed air from the first compressed air supply means is supplied to the first chamber with the first on-off valve held in the closed state and the second on-off valve held in the open state, The refrigerant liquid in the first chamber is supplied to the second chamber through the first refrigerant liquid supply flow path, the heat dissipation flow path, and the second refrigerant liquid supply flow path, and the first on-off valve is opened. When the compressed air from the second compressed air supply means is supplied to the second chamber with the second open / close valve held in the closed state, the refrigerant liquid in the second chamber is The second refrigerant liquid feed channel, the heat dissipation channel, and the first refrigerant liquid feed channel are fed to the first chamber.

In the LED lighting device according to claim 5 of the present invention, a head portion for accommodating the light source means, a control box portion for accommodating the refrigerant liquid supply means, and the refrigerant liquid circulation means are accommodated. And a cable part for
The LED of the light source means is a UVLED that irradiates ultraviolet rays, the control box unit further includes a power supply control unit for controlling the lighting of the LED, and the cable unit includes the head unit. A power cable for electrically connecting the LED and the power control unit of the control box unit is further accommodated.

Further, in the LED lighting device according to claim 6 of the present invention, the heat radiation channel is configured by a heat radiation chamber, the head portion further includes a mounting substrate to which the LED is mounted, and the mounting substrate is One side surface of the heat radiating chamber is defined, and the head portion defines the remaining side surface of the heat radiating chamber.

According to the LED lighting device of the first aspect of the present invention, the first and second chambers that are communicated with each other are provided, and the interior and the interior of the first chamber are switched between communication and shut-off with the atmosphere by an on-off valve, The interior of the second chamber is in communication with the atmosphere. When the interior of the first chamber is shut off from the atmosphere by the on-off valve, the pressure of the compressed air supplied to the first chamber causes the refrigerant liquid in the first chamber to be sent to the heat dissipation flow path through the first refrigerant liquid supply flow path. While being supplied, the refrigerant liquid from the heat radiating flow path is supplied to the second chamber through the second refrigerant liquid supply flow path. Since it is such a structure, a refrigerant | coolant liquid can be circulated without using an impeller type or a piston type pumping pump etc. conventionally, and the thermal radiation mechanism of a LED lighting apparatus can be reduced in size. Therefore, it is possible to provide an LED lighting device including a water-cooling type heat radiation mechanism suitable for a small LED lighting device. Further, since the refrigerant liquid in the first chamber is pushed out and circulated to the first refrigerant liquid supply flow path by the pressure of the compressed air supplied to the first chamber, the first and second refrigerant liquid supply flow paths Is relatively small in diameter (for example, about 1 to 2 mm) and long (for example, about 100 to 200 cm), the refrigerant liquid can be smoothly circulated through the first and second refrigerant liquid supply channels. Further, the pressure of the compressed air supplied to the first chamber may be at least large enough to push the refrigerant liquid in the first chamber to the first refrigerant liquid supply flow path. It can be made compact.
In addition, since the second chamber is disposed above the first chamber, a gravity difference is generated between the refrigerant liquid in the first chamber and the refrigerant liquid in the second chamber. Thereby, when the on-off valve is held in the open state, the refrigerant liquid in the second chamber can be efficiently introduced into the first chamber through the communication channel.

According to the LED lighting device of the second aspect of the present invention, the refrigerant liquid supply means includes the first and second chambers, and the compressed air supply means for supplying compressed air to the first and second chambers. And switching means for switching between communication and blocking between the inside of the first chamber and the atmosphere and communication and blocking between the inside of the second chamber and the atmosphere. The compressed air from the compressed air supply means is supplied to the first chamber in a state where the inside of the first chamber (second chamber) is blocked from the atmosphere by the switching means and the inside of the second chamber (first chamber) is communicated with the atmosphere. When supplied to the (second chamber), the refrigerant liquid in the first chamber (second chamber) becomes the first refrigerant liquid supply channel (second refrigerant liquid supply channel), the heat dissipation channel, and the second refrigerant liquid. It is fed to the second chamber (first chamber) through the feed passage (first refrigerant liquid feed passage). Since it is such a structure, a refrigerant | coolant liquid can be circulated without using an impeller type or a piston type pumping pump etc. conventionally, and the thermal radiation mechanism of a LED lighting apparatus can be reduced in size. Therefore, it is possible to provide an LED lighting device including a water-cooling type heat radiation mechanism suitable for a small LED lighting device. In addition, the refrigerant liquid in the first chamber (second chamber) is changed into the first refrigerant liquid supply flow path (second refrigerant liquid supply flow path) by the pressure of the compressed air supplied to the first chamber (second chamber). Since the first and second refrigerant liquid supply channels are relatively small in diameter (for example, about 1 to 2 mm) and long (for example, about 100 to 200 cm), The first and second refrigerant liquid supply channels can be smoothly circulated. The pressure of the compressed air supplied to the first chamber (second chamber) is such that at least the refrigerant liquid in the first chamber (second chamber) is supplied to the first refrigerant liquid supply channel (second refrigerant liquid feed). Since the size of the device can be pushed out to the supply channel), the entire apparatus can be made compact.

According to the LED lighting device of the third aspect of the present invention, the switching means includes a state in which the interior of the first chamber communicates with the atmosphere and a state in which the interior of the first chamber communicates with the compressed air supply means. And a second three-way valve that is switched to a state in which the interior of the second chamber communicates with the atmosphere and a state in which the interior of the second chamber communicates with the compressed air supply means. Yes. By switching the first and second three-way valves as required, the refrigerant fluid in the first chamber passes through the first refrigerant liquid supply passage, the heat dissipation passage, and the second refrigerant liquid supply passage. The first refrigerant liquid circulation state fed to the first chamber and the refrigerant liquid in the second chamber are fed to the first chamber through the second refrigerant liquid feed passage, the heat radiation passage, and the first refrigerant liquid feed passage. Can be smoothly switched to the second refrigerant liquid circulation state. In addition, since only one compressed air supply unit is required to supply compressed air to the first and second chambers, the number of parts can be reduced and the LED lighting device can be downsized.

Further, according to the LED lighting device according to claim 4 of the present invention, the switching means is closed the inside of the opening and the first chamber inside the first chamber is communicated with the atmosphere is blocked from the atmosphere A first on-off valve that is held; an open state in which the interior of the second chamber communicates with the atmosphere; and a second on-off valve that is maintained in a closed state in which the interior of the second chamber is blocked from the atmosphere. Yes. The compressed air supply means has first compressed air supply means for supplying compressed air to the first chamber, and second compressed air supply means for supplying compressed air to the second chamber. By opening and closing each of the first and second on-off valves as required, the refrigerant liquid in the first chamber passes through the first refrigerant liquid supply passage, the heat dissipation passage, and the second refrigerant liquid supply passage. The first refrigerant liquid circulation state fed to the chamber and the refrigerant liquid in the second chamber are fed to the first chamber through the second refrigerant liquid feed channel, the heat radiation channel and the first refrigerant liquid feed channel. It is possible to smoothly switch to the second refrigerant liquid circulation state.

Further, according to the LED lighting device according to claim 5 of the present invention, the head portion is accommodated light source means, the control box unit is accommodated refrigerant liquid supply means and the power supply control unit, also the cable portion A refrigerant liquid circulating means and a power cable are accommodated. Therefore, in the LED lighting apparatus having such a configuration as the ultraviolet irradiation apparatus, the refrigerant liquid supply means and the refrigerant liquid circulation means can be accommodated in a compact manner, and the entire apparatus can be made compact.

According to the LED lighting device of the sixth aspect of the present invention, the mounting substrate to which the UVLED is thermally attached defines one side surface of the heat radiation chamber as the heat radiation flow path, and the head portion of the heat radiation chamber Since the remaining side surfaces are defined, the heat dissipation chamber can be made compact, and the heat of the LED can be efficiently transmitted to the refrigerant liquid in the heat dissipation chamber via the mounting substrate.

It is a perspective view which shows the LED lighting apparatus by the 1st Embodiment of this invention. It is sectional drawing which shows simply the thermal radiation mechanism of the LED lighting apparatus of FIG. It is sectional drawing which expands and shows the head part of FIG. It is a flowchart which shows the flow of the on-off control of the on-off valve of FIG. It is sectional drawing which shows simply the thermal radiation mechanism of the LED lighting apparatus by the 2nd Embodiment of this invention. It is a flowchart which shows the flow of switching control of the 1st and 2nd three-way valve of FIG. It is sectional drawing which shows simply the thermal radiation mechanism of the LED lighting apparatus by the 3rd Embodiment of this invention. It is a flowchart which shows the flow of the opening / closing control of the 1st and 2nd on-off valve of FIG.

Hereinafter, various embodiments of an LED lighting device according to the present invention will be described with reference to the accompanying drawings.
[First Embodiment]
First, with reference to FIGS. 1-4, the LED illuminating device of 1st Embodiment is demonstrated. FIG. 1 is a perspective view showing an LED lighting device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view schematically showing a heat dissipation mechanism of the LED lighting device of FIG. 1, and FIG. FIG. 4 is an enlarged cross-sectional view of the head portion of FIG. 2, and FIG. 4 is a flowchart showing the flow of opening / closing control of the on-off valve of FIG.

  With reference to FIGS. 1 to 3, the LED illumination device 2 of the present embodiment is composed of a spot type ultraviolet irradiation device that irradiates a workpiece (not shown) with ultraviolet rays in a spot shape. The irradiation device is used, for example, for curing an ultraviolet curable resin, drying an ultraviolet ink, drying an ultraviolet paint, or the like. The LED lighting device 2 includes a head unit 6 in which the LED 4 is accommodated, a control box unit 8 in which a power supply control unit (not shown) for controlling the lighting of the LED 4 is accommodated, and the LED 4 and the control box in the head unit 6. And a cable portion 12 in which a power cable 10 for electrically connecting the power supply control portion of the portion 8 is accommodated.

  The front panel 14 of the control box unit 8 has a plurality of operation switches 16 for driving and controlling the power supply control unit and the like as required, a display 18 for digitally displaying predetermined numerical values, and the like. A display panel 20 for confirming the flow of cooling water (which constitutes the refrigerant liquid) in the second chambers 22 and 24 (described later) is provided. The cable portion 12 is formed in an elongated pipe shape, and one end portion of the cable portion 12 is connected to the head portion 6 and the other end portion is connected to the front panel 14 of the control box portion 8. When the operation switch 16 is operated, the power supply control unit is driven, and driving power from the power supply control unit is supplied to the LED 4 of the head unit 6 via the power cable 10 so that the LED 4 is turned on.

  The LED lighting device 2 of the present embodiment includes a water-cooled heat dissipation mechanism for dissipating the heat of the LEDs 4 of the head unit 6, and the configuration of this heat dissipation mechanism will be described below. A first chamber 22 and a second chamber 24 are disposed inside the control box unit 8, and the second chamber 24 is disposed above the first chamber 22. Reservoir spaces 25 and 27 for storing cooling water are formed in the first chamber 22 and the second chamber 24, respectively. The first chamber 22 and the second chamber 24 are communicated with each other via a communication channel 26, and the communication channel 26 allows the flow of cooling water from the second chamber 24 to the first chamber 22 and the first chamber 22. A check valve 28 for preventing the flow of cooling water from the chamber 22 to the second chamber 24 is provided.

  A compressor 30 (which constitutes compressed air supply means) for supplying compressed air is connected to the first chamber 22 via a compressed air supply pipe 32. The first chamber 22 is connected to a first atmosphere communication pipe 34 for communicating the inside with the atmosphere, and an opening / closing valve 36 is disposed in the first atmosphere communication pipe 34. The first atmosphere communication pipe 34 is preferably provided with a filter (not shown) for preventing dust and the like from the outside from entering the first chamber 22. The first chamber 22 has one end of a first cooling water supply pipe 38 (which constitutes a first refrigerant liquid supply flow path) for supplying the cooling water in the first chamber 22 to the head unit 6. Are connected. The first cooling water supply pipe 38 is composed of a flexible tube or the like, and has a diameter D1 of about 1 to 2 mm and a length of about 100 to 200 cm, for example. A heat radiating fin 40 is provided on the outer surface of the first chamber 22, and a blower fan 42 for sending cooling air to the heat radiating fin 40 is disposed inside the control box portion 8. When the cooling air from the blower fan 42 acts on the radiation fins 40, the heat of the cooling water in the first chamber 22 is transmitted to the radiation fins 40 through the first chamber 22, and is radiated from the radiation fins 40 to the atmosphere. Is done. In addition, the 1st chamber 22 and the radiation fin 40 are formed from the metal (for example, aluminum) which has heat conductivity.

  A second atmospheric communication pipe 44 is connected to the second chamber 24, and the interior of the second chamber 24 is always in communication with the atmosphere through the second atmospheric communication pipe 44. The second atmosphere communication pipe 44 is preferably provided with a filter (not shown) for preventing dust and the like from the outside from entering the second chamber 24. Further, the second chamber 24 is provided with a second cooling water supply pipe 46 (which constitutes a second refrigerant liquid supply flow path) for supplying the cooling water from the head unit 6 into the second chamber 24. One end is connected. The second cooling water supply pipe 46 is composed of a flexible tube or the like, and has a diameter D2 of, for example, about 1 to 2 mm and a length of, for example, about 100 to 200 cm.

  An opening / closing controller (not shown) and a timer (not shown) are provided inside the control box 8. The timer measures the elapse of the first time (for example, 70 seconds) from the start of lighting of the LED 4, and then the second time (for example, 10 seconds) further elapses from the elapse of the first time. After that, the further elapse of the first time from the elapse of the second time is measured, and the elapse of the first time and the second time is alternately and repeatedly measured in this way. The opening / closing control unit controls opening / closing of the opening / closing valve 36 based on the measurement time of the timer. That is, the open / close control unit holds the open / close valve 36 in the closed state until the first time elapses from the start of lighting of the LED 4 or the elapse of the second time, and the elapse of the first time. Until the second time elapses, the on-off valve 36 is held open. When the on-off valve 36 is held in the closed state, the inside of the first chamber 22 is blocked from the atmosphere, and when the on-off valve 36 is held in the open state, the inside of the first chamber 22 is communicated with the atmosphere.

  The head portion 6 includes a cylindrical first head main body portion 48 for supporting the LED 4 and a cylindrical second head main body portion 52 for supporting the condenser lens 50. The head main body portions 48 and 52 are connected to each other.

  An opening 54 is provided at one end of the first head body 48 and the other end is closed. An attachment board 56 on which the LEDs 4 are mounted is attached to the opening 54 of the first head main body 48. LED4 is comprised from UVLED which irradiates an ultraviolet-ray, and the attachment board | substrate 56 is formed from the metal (for example, aluminum) which has heat conductivity. One end of the power cable 10 extending through the first head main body 48 is electrically connected to the mounting surface of the mounting substrate 56, whereby the LED 4 and the power control unit of the control box unit 8 are connected to each other. It is electrically connected via the cable 10. In addition, the mounting substrate 56 and the first head main body 48 define a heat dissipation chamber 58 (which constitutes a heat dissipation flow path). The mounting substrate 56 defines one side surface of the heat dissipation chamber 58, and the first head main body 48. Defines the remaining side of the heat dissipation chamber 58. As a result, the LED 4 is thermally connected to the heat dissipation chamber 58. A heat radiating space 59 for storing cooling water is formed inside the heat radiating chamber 58. A seal member 60 such as an O-ring is interposed between the mounting substrate 56 and the opening 54 of the first head main body 48. The other end portions of the first and second cooling water supply pipes 38 and 46 extend through the other end portion of the first head main body portion 48 inside the heat radiation chamber 58.

  One end portion of the cable portion 12 is connected to the other end portion of the first head main body portion 48. This cable part 12 is comprised from the tube which has flexibility, and the electric power cable 10, the 1st cooling water feed pipe 38, and the 2nd cooling water feed pipe 46 are accommodated in the inside.

  Moreover, the both ends of the 2nd head main-body part 52 are opened, The condensing lens 50 for condensing the ultraviolet-ray from LED4 is attached to the one end part. The other end of the second head main body 52 is connected to one end of the first head main body 48.

  In the LED lighting device 2 of the present embodiment, the LED 4 and the heat radiation chamber 58 constitute the light source means 62, the first and second cooling water supply pipes 38 and 46 constitute the refrigerant liquid circulation means 64, and the first The first chamber 22, the second chamber 24, the communication flow path 26, the check valve 28, the compressor 30 and the on-off valve 36 constitute a refrigerant liquid supply means 66.

  Next, heat radiation of the LED 4 in the LED lighting device 2 of the present embodiment will be described with reference to FIG. When the operation switch 16 is operated (step S1), the LED 4 is turned on (step S2), and the measurement of the first time and the second time by the timer is started (step S3). Further, the compressor 30 and the blower fan 42 are respectively operated (step S4). The ultraviolet rays from the LED 4 are condensed by the condenser lens 50 and irradiated onto a work (not shown) such as an ultraviolet curable resin. Compressed air from the compressor 30 is supplied into the first chamber 22 through the compressed air supply pipe 32, and cooling air from the blower fan 42 is sent toward the radiating fins 40 of the first chamber 22.

  The opening / closing controller holds the opening / closing valve 36 in a closed state (step S5), and the interior of the first chamber 22 is shut off from the atmosphere. Thereby, the cooling water in the first chamber 22 is supplied to the heat radiating chamber 58 of the head portion 6 through the first cooling water supply pipe 38 by the pressure of the compressed air supplied into the first chamber 22. Thus, the cooling water is stored in the heat radiation chamber 58, and the heat of the LED 4 is transferred to the cooling water in the heat radiation chamber 58 via the mounting substrate 56, so that the heat of the LED 4 is radiated.

  The cooling water in the heat radiation chamber 58 that has absorbed the heat of the LED 4 is fed into the second chamber 24 through the second cooling water feed pipe 46. In this way, the cooling water from the first chamber 22 is supplied to the second chamber 24 through the first cooling water supply pipe 38, the heat radiation chamber 58 and the second cooling water supply pipe 46, thereby the cooling water. Is circulated through the heat radiation chamber 58 (step S6). As the cooling water is circulated through the heat radiation chamber 58 as described above, the cooling water level in the first chamber 22 is lowered and the cooling water level in the second chamber 24 is raised. Note that the pressure in the first chamber 22 is higher than the atmospheric pressure, and the pressure in the second chamber 24 is equal to the atmospheric pressure. Due to this pressure difference, the cooling water in the second chamber 24 passes through the communication channel 26 to the first. Inflow into the chamber 22 is blocked.

  When a first time (for example, 70 seconds) has elapsed since the start of lighting of the LED 4, the process proceeds from step S7 to step S8, and the open / close control unit holds the open / close valve 36 in the open state. As a result, the inside of the first chamber 22 communicates with the atmosphere, so that the pressure in the first chamber 22 and the pressure in the second chamber 24 are both equal to the atmospheric pressure, and the cooling water in the second chamber 24 communicates. It flows into the first chamber 22 through the flow path 26. At this time, the cooling water in the first chamber 22 is not supplied to the heat radiating chamber 58 through the first cooling water supply pipe 38, and the circulation of the cooling water through the heat radiating chamber 58 is stopped (step S9). Note that the heat of the cooling water flowing into the first chamber 22 from the second chamber 24 is radiated to the atmosphere from the radiation fins 40.

  Thereafter, when a second time (for example, 10 seconds) elapses from the elapse of the first time, the process returns from step S10 to step S5, and the above-described steps S5 to S10 are repeatedly performed. As described above, the cooling water is circulated through the heat radiation chamber 58 during the first time, and the circulation of the cooling water through the heat radiation chamber 58 is stopped during the second time. As described above, the cooling water circulation and circulation stop through the heat radiation chamber 58 are alternately repeated, whereby the heat of the LED 4 is radiated.

  In the LED lighting device 2 of the present embodiment, the cooling water can be circulated without using an impeller type or piston type pumping pump or the like as in the prior art, so that the heat dissipation mechanism can be miniaturized. Thereby, the LED lighting apparatus 2 provided with the water-cooling type heat radiation mechanism suitable for the small LED lighting apparatus 2 can be provided. Further, since the cooling water in the first chamber 22 is pushed out and circulated by the first cooling water supply pipe 38 by the pressure of the compressed air supplied to the first chamber 22, the first and second cooling water supply Even if the supply pipes 38 and 46 are relatively small in diameter and long, the cooling water can be smoothly circulated through the first and second cooling water supply pipes 38 and 46. In addition, the pressure of the compressed air supplied to the first chamber 22 may be at least large enough to push the cooling water of the first chamber 22 to the first cooling water supply pipe 38. The LED lighting device 2 as a whole can be made compact.

In the present embodiment, the second chamber 24 is configured to be disposed above the first chamber 22, but for example, the first and second chambers 22, 24 may be disposed side by side, The arrangement can be set as appropriate.
[Second Embodiment]
Next, with reference to FIG.5 and FIG.6, the LED lighting apparatus of 2nd Embodiment is demonstrated. FIG. 5 is a cross-sectional view schematically showing the heat dissipation mechanism of the LED lighting device according to the second embodiment of the present invention, and FIG. 6 shows the flow of switching control of the first and second three-way valves of FIG. It is a flowchart. In each of the embodiments described below, the same reference numerals are given to substantially the same components as those in the first embodiment, and the description thereof is omitted.

  Referring to FIG. 5, in the LED lighting device 2 </ b> A of the present embodiment, first and second three-way valves 68 and 70 (which constitute a switching unit) are provided. Note that, unlike the first embodiment, there is no communication channel that allows the first chamber 22A and the second chamber 22A to communicate with each other. The first three-way valve 68 has three ports, that is, a first port 72, a second port 74, and a third port 76. The first port 72 of the first three-way valve 68 is communicated with a compressor 80 (composing compressed air supply means) via a compressed air supply pipe 78, and the second port 74 is communicated with the atmosphere via a first atmospheric communication pipe 82. The third port 76 is communicated with the inside of the first chamber 22 </ b> A via the first connection pipe 84. The second three-way valve 70 has three ports, that is, a first port 86, a second port 88, and a third port 90. The first port 86 of the second three-way valve 70 is communicated with the compressor 80 via the compressed air supply pipe 78, the second port 88 is communicated with the atmosphere via the second atmospheric communication pipe 92, and the third port 90 is It communicates with the inside of the second chamber 24 </ b> A via the two connection pipes 94. The first three-way valve 68 (second three-way valve 70) communicates the first port 72 (86) and the third port 76 (90) and closes the second port 74 (88); The second port 74 (88) and the third port 76 (90) communicate with each other and can be switched to a second switching state in which the first port 72 (86) is closed. When first three-way valve 68 (second three-way valve 70) is held in the first switching state, the interior of first chamber 22A (second chamber 24A) is blocked from the atmosphere and communicated with compressor 80. Further, when the first three-way valve 68 (second three-way valve 70) is held in the second switching state, the interior of the first chamber 22A (second chamber 24A) is communicated with the atmosphere and shut off from the compressor 80. The

  In the LED lighting device 2A of the present embodiment, the first chamber 22A, the second chamber 24A, the first three-way valve 68, the second three-way valve 70, and the compressor 80 constitute a refrigerant liquid supply means 66A.

  A switching control unit (not shown) and a timer (not shown) are provided inside the control box unit 8. The timer measures the elapse of a first time (for example, 60 seconds) from the start of operation of the compressor 80, and then further elapses a second time (for example, 60 seconds) from the elapse of the first time. After that, the further elapse of the first time from the elapse of the second time is measured, and the elapse of the first time and the second time is alternately and repeatedly measured in this way. The switching control unit switches and controls the first and second three-way valves 68 and 70 based on the measurement time of the timer. That is, the switching control unit holds the first three-way valve 68 in the first switching state from when the compressor 80 starts operating (or when the second time elapses) until the first time elapses. The second three-way valve 70 is held in the second switching state, and the first three-way valve 68 is held in the second switching state from the time when the first time elapses until the second time passes. 2 Hold the three-way valve 70 in the first switching state.

  In addition, a temperature detection sensor 96 that detects the temperature of the cooling water in the heat radiation chamber 58 is embedded in one side portion of the heat radiation chamber 58 of the head portion 6A. The switching control unit controls the operation of the compressor 80 based on the temperature detected by the temperature detection sensor 96. That is, the switching control unit operates the compressor 80 when the temperature detected by the temperature detection sensor 96 exceeds a predetermined temperature (for example, 60 ° C.), and operates the compressor 80 when the temperature detected by the temperature detection sensor 96 falls below the predetermined temperature. Stop.

  Next, with reference also to FIG. 6, the heat radiation of the LED 4 in the LED lighting device 2A of the present embodiment will be described. When an operation switch (not shown) is operated (step S21), the LED 4 is turned on (step S22). Thus, when LED4 lights, the temperature of the cooling water in the thermal radiation chamber 58 will rise with the heat | fever of LED4. When the temperature detected by the temperature detection sensor 96 exceeds the predetermined temperature, the process proceeds from step S23 to step S24, where the compressor 80 and the blower fan 42 are operated, and measurement of the first time and the second time by the timer is started. (Step S25).

  The switching control unit holds the first three-way valve 68 in the first switching state and holds the second three-way valve 70 in the second switching state until the first time elapses from the start of the operation of the compressor 80. (Step S26). Thereby, the inside of the first chamber 22A is blocked from the atmosphere, and the inside of the second chamber 24A is communicated with the atmosphere. The compressed air from the compressor 80 is supplied into the first chamber 22A through the compressed air supply pipe 78, and the pressure inside the first chamber 22A becomes larger than the pressure inside the second chamber 24A. Due to this pressure difference, the cooling water in the first chamber 22 </ b> A is supplied to the heat radiation chamber 58 of the head portion 6 </ b> A through the first cooling water supply pipe 38. The cooling water in the heat radiation chamber 58 that has absorbed the heat of the LED 4 is fed into the second chamber 24A through the second cooling water feed pipe 46. In this way, the cooling water from the first chamber 22A is supplied to the second chamber 24A through the first cooling water supply pipe 38, the heat radiating chamber 58, and the second cooling water supply pipe 46 (first first). (Cooling water circulation state) (step S27).

  When the first time has elapsed from the start of the operation of the compressor 80, the process proceeds from step S28 to step S29, and the switching control unit holds the first three-way valve 68 in the second switching state and sets the second three-way valve 70 to the first. Hold in the switching state. Thereby, the inside of the second chamber 24A is blocked from the atmosphere, and the inside of the first chamber 22A is communicated with the atmosphere. The compressed air from the compressor 80 is supplied into the second chamber 24A through the compressed air supply pipe 78, and the pressure inside the second chamber 24A becomes larger than the pressure inside the first chamber 22A. Due to this pressure difference, the cooling water in the second chamber 24 </ b> A is supplied to the heat radiation chamber 58 of the head portion 6 </ b> A through the second cooling water supply pipe 46. The cooling water in the heat radiation chamber 58 that has absorbed the heat of the LED 4 is fed into the first chamber 22A through the first cooling water feed pipe 38 (second cooling water circulation state).

Thereafter, when the second time elapses from the elapse of the first time, the process proceeds from step S31 to step S32. When the temperature detected by the temperature detection sensor 96 is lower than the predetermined temperature, the process proceeds from step S32 to step S33, the compressor 80 and the blower fan 42 are deactivated, and the timer is stopped (step S34). Thereby, the circulation of the cooling water is stopped (step S35). Then, it returns to step S23 and step S23-step S35 mentioned above are performed repeatedly. As described above, during the first time, the cooling water passes through the first cooling water supply pipe 38, the heat radiation chamber 58 and the second cooling water supply pipe 46 in a predetermined direction (indicated by a white arrow in FIG. 5). The cooling water is circulated through the second cooling water supply pipe, the heat radiation chamber 58 and the first cooling water supply pipe 38 in the direction opposite to the predetermined direction (black in FIG. 5) during the second time. It is circulated in the direction indicated by the arrow).
[Third Embodiment]
Next, with reference to FIG.7 and FIG.8, the LED lighting apparatus of 3rd Embodiment is demonstrated. FIG. 7 is a cross-sectional view schematically showing a heat dissipation mechanism of the LED lighting device according to the third embodiment of the present invention, and FIG. 8 shows a flow of opening / closing control of the first and second on-off valves of FIG. It is a flowchart.

  With reference to FIG. 7, the LED illumination device 2 </ b> B of the present embodiment is configured by a line-type ultraviolet irradiation device that irradiates a workpiece (not shown) with ultraviolet rays in a line shape. The head portion 6B includes a head main body portion 100 having an opening portion 98, and a plate-like condensing lens 102 for condensing ultraviolet rays from the plurality of LEDs 4 is attached to the opening portion 98. A heat radiating block 104 is disposed inside the head main body 100, and the heat radiating block 104 is formed of a metal having thermal conductivity (for example, aluminum). A heat radiating pipe 106 (which constitutes a heat radiating flow path) is embedded in the heat radiating block 104 in a state of being folded back into a substantially U shape. Both ends of the heat radiating pipe 106 pass through one side of the head main body 100 and are connected to the other ends of the first and second cooling water supply pipes 38 and 46, respectively. A mounting substrate 108 on which a plurality of LEDs 4 are mounted is attached to one side surface of the heat dissipation block 104. LED4 is comprised from UVLED which irradiates an ultraviolet-ray, and is arrange | positioned at predetermined intervals on the mounting surface of the attachment board | substrate 108 at linear form. The mounting substrate 108 is formed of a metal having thermal conductivity (for example, aluminum). One end of a power cable (not shown) extending through the head main body 100 is electrically connected to the mounting surface of the mounting substrate 108, thereby controlling the power of the plurality of LEDs 4 and the control box unit 8. The unit (not shown) is electrically connected via a power cable.

  A first compressor 110 (which constitutes first compressed air supply means) for supplying compressed air is connected to the first chamber 22B via a first compressed air supply pipe 112. The first chamber 22B is connected to a first atmospheric communication pipe 114 for communicating the inside with the atmosphere. The first atmospheric communication pipe 114 is provided with a first on-off valve 116 (which constitutes a switching means). It is installed. When the first on-off valve 116 is held in the closed state, the inside of the first chamber 22B is shut off from the atmosphere, and when the first on-off valve 116 is held in the open state, the inside of the first chamber 22B is Communicated. In addition, a water level detection sensor 118 that detects the water level of the cooling water in the first chamber 22B is disposed inside the first chamber 22B. Radiation fins 40B are provided on the outer surface of the first chamber 22B via Peltier elements 120.

  A second compressor 122 (constituting second compressed air supply means) for supplying compressed air is connected to the second chamber 24B via a second compressed air supply pipe 124. The second chamber 24B is connected to a second atmosphere communication pipe 126 for communicating the inside with the atmosphere, and the second atmosphere communication pipe 126 is provided with a second on-off valve 128 (which constitutes a switching means). It is installed. When the second on-off valve 128 is held in the closed state, the inside of the second chamber 24B is shut off from the atmosphere, and when the second on-off valve 128 is held in the open state, the inside of the second chamber 24B is Communicated.

  In the LED lighting device 2B of the present embodiment, the LED 4 and the heat radiating tube 106 constitute the light source means 62B, and the first chamber 22B, the second chamber 24B, the first on-off valve 116, the second on-off valve 128, the first compressor 110 and the second compressor 122 constitute refrigerant liquid supply means 66B.

  An opening / closing controller (not shown) is provided inside the control box 8. The opening / closing control unit controls the opening and closing of the first and second opening / closing valves 116 and 128 and the operation of the first and second compressors 110 and 122, respectively, based on the temperature detected by the water level detection sensor 118. That is, when the water level detection sensor 118 detects that the water level of the cooling water exceeds the predetermined water level, the opening / closing control unit operates the first compressor 110 and stops the second compressor 122. The first on-off valve 116 is kept closed and the second on-off valve 128 is kept open. When the water level detection sensor 118 detects that the coolant level is lower than the predetermined level, the open / close control unit stops the first compressor 110 and operates the second compressor 122. Further, the first on-off valve 116 is held in the open state and the second on-off valve 128 is held in the closed state.

  Next, with reference also to FIG. 8, the heat radiation of the LED 4 in the LED lighting device 2B of the present embodiment will be described. When an operation switch (not shown) is operated (step S41), the LED 4 is turned on (step S42). When the water level of the cooling water in the first chamber 22B exceeds the predetermined water level, the process proceeds from step S43 to step S44, and the open / close control unit controls the first compressor 110 based on the detection signal from the water level detection sensor 118. The second compressor 122 is operated and stopped (step S44), the first on-off valve 116 is kept closed, and the second on-off valve 128 is kept open (step S45). Thereby, the inside of the first chamber 22B is blocked from the atmosphere, and the inside of the second chamber 24B is communicated with the atmosphere. The compressed air from the first compressor 110 is supplied into the first chamber 22B through the first compressed air supply pipe 112, and the pressure inside the first chamber 22B becomes larger than the pressure inside the second chamber 24B. Due to this pressure difference, the cooling water in the first chamber 22B is supplied to the second chamber 24B through the first cooling water supply pipe 38, the heat radiating pipe 106 of the head portion 6B, and the second cooling water supply pipe 46. (First Cooling Water Circulation State) (Step S46).

  As the cooling water is circulated in this manner, the cooling water level in the first chamber 22B decreases and the cooling water level in the second chamber 24B increases. When the cooling water level in the first chamber 22B falls below the predetermined water level, the process proceeds from step S47 to step S48, and the opening / closing control unit stops the operation of the first compressor 110 and operates the second compressor 122 (step). In addition, the first on-off valve 116 is held in the open state and the second on-off valve 128 is held in the closed state (step S49). Thereby, the inside of the first chamber 22B communicates with the atmosphere, and the inside of the second chamber 24B is blocked from the atmosphere. The compressed air from the second compressor 122 is supplied into the second chamber 24B through the second compressed air supply pipe 124, and the pressure inside the second chamber 24B becomes larger than the pressure inside the first chamber 22B. Due to this pressure difference, the cooling water in the second chamber 24B is supplied to the first chamber 22B through the second cooling water supply pipe 46, the heat radiating pipe 106 of the head portion 6B, and the first cooling water supply pipe 38. (Second cooling water circulation state) (Step S50). Then, it returns to step S43 and repeats step S43-step S50 mentioned above. In step S42, when the coolant level is lower than the predetermined level, the process proceeds from step S43 to step S48.

  As described above, while the cooling water level in the first chamber 22B exceeds the predetermined water level, the cooling water is supplied to the first cooling water supply pipe 38, the heat radiating pipe 106, and the second cooling water supply pipe. 46 is circulated in a predetermined direction (indicated by a white arrow in FIG. 7), and while the water level of the cooling water in the first chamber 22B is lower than the predetermined water level, the cooling water is the second cooling water. It is circulated through the feed pipe 46, the heat radiating pipe 106, and the first cooling water feed pipe 38 in the direction opposite to the predetermined direction (the direction indicated by the black arrow in FIG. 5). As the cooling water flows through the heat radiating tube 106 in this manner, the heat of the LED 4 is transmitted to the cooling water in the heat radiating tube 106 through the mounting substrate 108 and the heat radiating block 104, and the heat of the LED 4 is radiated.

  As mentioned above, although various embodiment of the LED lighting apparatus according to this invention was described, this invention is not limited to this embodiment, A various deformation | transformation thru | or correction | amendment are possible without deviating from the scope of this invention. .

  In the first and second embodiments, the mounting substrate 56 is configured to be attached to the opening 54 of the first head main body 48. However, the mounting substrate 56 has a thermal conductivity on the surface opposite to the mounting surface. You may comprise so that the heat dissipation board formed from the metal (for example, aluminum) which has this may be attached. In such a configuration, one side surface of the heat dissipation chamber 58 is defined by the mounting substrate 56 and the heat dissipation substrate, and the heat of the LED 4 is transferred to the cooling water in the heat dissipation chamber 58 via the mounting substrate 56 and the heat dissipation substrate. Will come to be.

  Further, the LED illumination devices 2 and 2A of the first and second embodiments are constituted by spot type ultraviolet irradiation devices, and the LED illumination device 2B of the third embodiment is constituted by a line type ultraviolet irradiation device. However, the LED illuminating devices 2 and 2A of the first and second embodiments are configured by a line-type ultraviolet irradiation device, and the LED lighting device 2B of the third embodiment is configured by a spot-type ultraviolet irradiation device. May be. In each of the above-described embodiments, the case where the LED illumination devices 2 (2A) and (2B) are applied to the ultraviolet irradiation device has been described. The present invention can be applied to various lighting devices.

2,2A, 2B LED lighting device 4 LED
6, 6A, 6B Head section 8 Control box section 10 Power cable 12 Cable section 22, 22A, 22B First chamber 24, 24A, 24B Second chamber 26 Communication flow path 28 Check valve 30, 80 Compressor 36 On-off valve 38 First 1 cooling water supply pipe 46 second cooling water supply pipe 56 mounting substrate 58 heat radiation chamber 62, 62B light source means 64 refrigerant liquid circulation means 66, 66A, 66B refrigerant liquid supply means 68 first three-way valve 70 second three-way valve 106 Radiation pipe 110 First compressor 116 First on-off valve 122 Second compressor 128 Second on-off valve

Claims (6)

A light source means, a refrigerant liquid supply means for supplying a refrigerant liquid for cooling the light source means, and a refrigerant liquid circulation means for circulating the refrigerant liquid from the refrigerant liquid supply means through the light source means. Prepared,
The light source means includes an LED and a heat radiation channel for radiating heat of the LED, and the refrigerant liquid supply means includes first and second chambers in which refrigerant liquid is stored, the first and second A communication channel that communicates the second chamber with each other; a check valve that is disposed in the communication channel and blocks the flow of the refrigerant liquid from the first chamber to the second chamber; and the first chamber A compressed air supply means for supplying compressed air; and an on-off valve for switching communication between the interior of the first chamber and the atmosphere, and the refrigerant liquid circulation means is connected to the first chamber. A first refrigerant liquid supply channel for supplying refrigerant liquid to the heat dissipation channel, and a second refrigerant liquid supply channel for supplying refrigerant liquid from the heat dissipation channel to the second chamber And the interior of the second chamber is configured to communicate with the atmosphere. It has been,
When the on-off valve is held in a closed state, the interior of the first chamber is shut off from the atmosphere, and the refrigerant liquid in the first chamber is changed to the first refrigerant by the pressure of the compressed air supplied to the first chamber. The refrigerant is supplied to the heat radiating flow path through the liquid supply flow path, and the refrigerant liquid from the heat radiating flow path is supplied to the second chamber through the second refrigerant liquid supply flow path. Is maintained in an open state, the interior of the first chamber communicates with the atmosphere, the refrigerant liquid in the second chamber flows into the first chamber through the communication channel , and the second chamber is in the first chamber. An LED illumination device, which is disposed above a chamber .   A light source means, a refrigerant liquid supply means for supplying a refrigerant liquid for cooling the light source means, and a refrigerant liquid circulation means for circulating the refrigerant liquid from the refrigerant liquid supply means through the light source means. Prepared,
  The light source means includes an LED and a heat radiation channel for radiating heat of the LED, and the refrigerant liquid supply means includes first and second chambers in which refrigerant liquid is stored, the first and second Compressed air supply means for supplying compressed air to the second chamber, switching for switching between communication and blocking between the inside of the first chamber and the atmosphere, and communication and blocking between the inside of the second chamber and the atmosphere And the refrigerant liquid circulation means includes: a first refrigerant liquid supply channel that communicates the interior of the first chamber and the heat dissipation channel; the interior of the second chamber; and the heat dissipation channel. A second refrigerant liquid supply flow path that communicates with
  When compressed air from the compressed air supply means is supplied to the first chamber in a state where the inside of the first chamber is blocked from the atmosphere by the switching means and the inside of the second chamber is communicated with the atmosphere. The refrigerant liquid in the first chamber is supplied to the second chamber through the first refrigerant liquid supply flow path, the heat radiation flow path, and the second refrigerant liquid supply flow path. When compressed air from the compressed air supply means is supplied to the second chamber in a state where the interior of the first chamber is communicated with the atmosphere and the interior of the second chamber is blocked from the atmosphere, the second chamber The refrigerant liquid is fed to the first chamber through the second refrigerant liquid feed channel, the heat radiation channel, and the first refrigerant liquid feed channel. The switching means includes a first three-way valve that switches between a state in which the interior of the first chamber communicates with the atmosphere and a state in which the interior of the first chamber communicates with the compressed air supply means; A second three-way valve that is switched to a state in which the interior communicates with the atmosphere and a state in which the interior of the second chamber communicates with the compressed air supply means;
The first three-way valve communicates the interior of the first chamber with the compressed air supply means and the second three-way valve communicates with the atmosphere of the second chamber from the compressed air supply means. When compressed air is supplied to the first chamber, the refrigerant liquid in the first chamber passes through the first refrigerant liquid supply flow path, the heat dissipation flow path, and the second refrigerant liquid supply flow path. And the first three-way valve communicates the interior of the first chamber with the atmosphere and the second three-way valve communicates the interior of the second chamber with the compressed air supply means. When the compressed air from the compressed air supply means is supplied to the second chamber, the refrigerant liquid in the second chamber is supplied to the second refrigerant liquid supply channel, the heat dissipation channel, and the first refrigerant liquid supply. The first cha through the flow path LED lighting device according to claim 2, characterized in that it is delivered to the server. The switching means includes a first on-off valve that is maintained in an open state in which the interior of the first chamber communicates with the atmosphere and a closed state in which the interior of the first chamber is blocked from the atmosphere, and the interior of the second chamber And a second on-off valve held in a closed state in which the inside of the second chamber is cut off from the atmosphere, and the compressed air supply means compresses the first chamber. First compressed air supply means for supplying air, and second compressed air supply means for supplying compressed air to the second chamber,
  When compressed air from the first compressed air supply means is supplied to the first chamber with the first on-off valve held in the closed state and the second on-off valve held in the open state, The refrigerant liquid in the first chamber is supplied to the second chamber through the first refrigerant liquid supply flow path, the heat dissipation flow path, and the second refrigerant liquid supply flow path, and the first on-off valve is opened. When the compressed air from the second compressed air supply means is supplied to the second chamber with the second open / close valve held in the closed state, the refrigerant liquid in the second chamber is 3. The LED lighting device according to claim 2, wherein the LED illumination device is supplied to the first chamber through the second refrigerant liquid supply channel, the heat radiation channel, and the first refrigerant liquid supply channel. A head portion for accommodating the light source means, a control box portion for accommodating the refrigerant liquid supply means, and a cable portion for accommodating the refrigerant liquid circulation means,
The LED of the light source means is a UVLED that irradiates ultraviolet rays, the control box unit further includes a power supply control unit for controlling the lighting of the LED, and the cable unit includes the head unit. The LED lighting device according to any one of claims 1 to 4, further comprising a power cable for electrically connecting the LED and the power control unit of the control box unit. The heat dissipation channel is configured by a heat dissipation chamber, and the head portion further accommodates a mounting substrate to which the LED is mounted, the mounting substrate defines one side of the heat dissipation chamber, and the head portion is 6. The LED lighting device according to claim 5, wherein the remaining side surface of the heat dissipating chamber is defined.

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