JP2013020953A - Balloon type floodlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a balloon type floodlight of an LED light source capable of power saving by shortening the time required for re-lighting and having brightness comparable to the brightness of an HID lamp.SOLUTION: The balloon type floodlight 1 is provided with a balloon 5, a light source portion 7 arranged in the balloon 5, and a blower 10 for supplying air for swelling the balloon 5. The light source portion 7 has a cylindrical heat radiator 8 and an LED 9 arranged on the surface of the cylindrical radiator 8. The cylindrical radiator 8 has a plurality of sheets of heat radiating plates 14 having heat radiating blades 14A of cross-sectionally comb-shape on one surface side and a plane to arrange the LED 9 on the another surface side so that the heat radiating blades 14A may be inside. The blower 10 is arranged so that the air flow by the blower 10 may pass the inside of the cylindrical radiator 8 and cool the power supply circuit 11 for LED.

Description

  The present invention relates to a floodlight projector that is used for illumination outdoors and the like, in which a light source is arranged in a balloon inflated with air.

  In a conventional balloon-type projector, an illuminating device is configured by a balloon, a light source provided inside the balloon, a drive unit that supplies air for inflating the balloon, and the telescopic device that connects the illuminating device to the tip. A free strut, a power supply device for supplying power to the lighting device, and the like are provided (see Patent Document 1 below).

  On the other hand, lighting devices using LED light sources have recently become widespread. Patent Document 2 listed below describes an LED illuminating lamp capable of omnidirectional illumination in which LEDs are arranged on the outside of a columnar heat sink (heat radiator) that includes a plurality of fins (radiating blades) inside.

JP 2006-92753 A JP 2010-118325 A

  Conventionally, a high-intensity discharge lamp (HID lamp) is used as a light source provided in a balloon of a balloon-type projector. The high-intensity discharge lamp is satisfactory in terms of brightness, but there is a problem that a sufficient amount of light cannot be obtained for about several minutes after lighting, and once it is turned off, it is turned on again and it takes 10 to 20 minutes until a sufficient amount of light is obtained. It takes some time. Therefore, if lighting and non-lighting of the balloon-type projector is frequently repeated at the work site, the work efficiency will be reduced, and at the normal work site, the lighting state will be continuously maintained regardless of the suspension of work. Things have been done. For this reason, the conventional balloon projector has not only a disadvantage that a sufficient amount of light cannot be obtained immediately after lighting, but also a problem from the viewpoint of power saving.

  On the other hand, LEDs have been attracting attention as light sources with low power consumption in recent years, and various types of LED lighting have been put into practical use and are used in many scenes. However, LEDs are vulnerable to heat, and it is said that deterioration of elements starts at 80 ° C. or higher. Although heat generation during light emission is less than that of other light sources, heat dissipation to maintain the light emission life is incandescent or fluorescent. The necessity is rather high compared with light sources such as.

  When an LED is used as the light source of a balloon-type projector, a high amount of heat is generated by using an LED with a large amount of light that replaces the brightness of the HID lamp. Therefore, efficient heat dissipation is essential. is there.

  For this, it is conceivable to use a cylindrical radiator having a fin structure inside as described in Patent Document 2, but as a radiator disposed inside the balloon, a fin structure is simply used. A cylindrical radiator just provided inside cannot provide a sufficient heat dissipation effect. In particular, in the cylindrical radiator as described in Patent Document 2, there is a problem that good adhesion cannot be obtained between the LED mounted on the surface and the curved surface, and heat conduction is insufficient. Arise. In addition, in order to solve this problem, it is necessary to planarize the local surface of the radiator on which the LED is mounted. If such a process is performed, the manufacturing process becomes complicated and the cost increases. Problems arise.

  Moreover, when using LED as a light source of a balloon type projector, arrangement | positioning of the power circuit for LED becomes a problem. The LED power supply circuit with a large wattage for lighting a large amount of LED light generates a lot of heat, and a large heat sink is required for natural cooling. For this reason, it is impossible to arrange the LED power supply circuit including the heat sink in the balloon used on the column in terms of size and weight. Also, if the LED power supply circuit is placed outside the balloon, wiring is required to supply power from the LED power supply circuit placed outside the balloon to the LED in the balloon, and power is supplied to the blower for inflating the balloon. In addition to the wiring to be performed, two systems of wiring are required, which causes a problem that wiring is complicated.

  As described above, there are some problems in using an LED light source for a balloon-type projector, and a large light quantity LED that emits light in all directions with brightness comparable to the light quantity of an HID lamp of 300 W or more. The balloon-type projector used is not yet in practical use.

  The present invention has been proposed in order to cope with such a situation. By performing efficient heat radiation, the present invention has brightness comparable to the light quantity of an HID lamp of 300 W or more, and light is emitted in all directions. An object of the present invention is to provide a balloon-type projector that can use a large-intensity LED that emits light as a light source of a balloon-type projector, shortens the time required for relighting, and enables power saving.

In order to achieve such an object, the present invention comprises at least the following configuration. That is, the balloon-type projector of the present invention includes a balloon, a light source unit disposed inside the balloon, and a blower that supplies air for inflating the balloon, and can emit light in all directions. The light source unit includes a cylindrical radiator and an LED disposed on a surface of the cylindrical radiator, and the cylindrical radiator has a comb-shaped radiating blade on one surface side. A plurality of heat sinks having a flat surface on which the LEDs are arranged on the other side are combined to form a cylindrical shape so that the heat radiating blades are on the inside, and the air flow generated by the blower is the cylindrical heat radiator. The LED is arranged so as to cool the LED power supply circuit section, and the LED is 30 lumen or more per 1 cm ² of the surface of the cylindrical radiator and 30,000 on the entire surface of the cylindrical radiator. Emitting light with a luminous flux above the lumen And features.

  The balloon-type floodlight projector of the present invention having such a feature is a blower for inflating a balloon inside the tubular radiator, in which the light source disposed inside the balloon includes a tubular radiator. The light source is forcedly cooled by passing the airflow obtained from the above, and the airflow is applied to the heat radiating blades of the cylindrical radiator, and the LED power supply circuit is forcibly cooled. Further, since the LEDs are arranged on the flat surface of the heat radiating plate having a comb-like radiating blade on one surface side and a flat surface on the other surface side, heat conduction to a good heat radiating plate is enabled. .

  This enables high-efficiency heat dissipation to the light source unit equipped with LEDs, and balloon-type projection of large-intensity LEDs that emit light in all directions with brightness comparable to that of HID lamps of 300W or more. It became possible to use as a light source of the machine. Such a balloon-type floodlight with a built-in LED can shorten the time required for re-lighting, so that it can be turned on and off frequently as necessary to save power. become. In particular, when a storage battery is used as a power source, it can be lit only when necessary, so that the substantial usable time per charge can be extended.

It is explanatory drawing which showed the whole structure of the balloon type projector which concerns on embodiment of this invention. It is explanatory drawing which showed the structural example of the light source part arrange | positioned inside the balloon in the balloon type projector which concerns on embodiment of this invention. It is sectional drawing which showed the other form example of the cylindrical heat radiator in embodiment of this invention. It is explanatory drawing which illustrated the cross-sectional shape of the heat sink which comprises the cylindrical heat radiator used for the light source part in embodiment of this invention. It is explanatory drawing which showed arrangement | positioning / mounting form of LED with respect to a heat sink. It is explanatory drawing which showed an example of the combination form of the heat sink in a cylindrical heat radiator. It is explanatory drawing which showed an example of the combination form of the heat sink in a cylindrical heat radiator. It is explanatory drawing which showed the other form example of the balloon type projector which concerns on embodiment of this invention.

A balloon-type projector according to an embodiment of the present invention includes a balloon, a light source unit disposed inside the balloon, and a blower that supplies air for inflating the balloon, and is capable of irradiating light in all directions. It is a light machine. The light source unit includes a cylindrical radiator and an LED disposed on the surface of the cylindrical radiator. The cylindrical radiator has a cylindrical shape by combining a plurality of radiator plates, each having a comb-shaped radiator blade on one side and a flat surface on which the LED is arranged on the other side, so that the radiator blade is on the inside. It is configured. And the air blower is arrange | positioned so that the airflow by the said air fan may pass the inner side of a cylindrical heat radiator, and cool the power supply circuit part for LED. By adopting such a heat dissipation configuration, the cylindrical heatsink and the LED power supply circuit part are forcibly cooled by blowing air, so that the LED is 30 lumen or more per 1 cm ² of the surface of the cylindrical heatsink, and the cylindrical heatsink. It is possible to emit light with a light flux of 30,000 lumens or more over the entire surface.

  The heat radiating plate of the cylindrical radiator can be formed of an aluminum material or the like, and can be configured in a cylindrical shape by combining three or more heat radiating plates with comb-shaped radiating blades inside. Cylindrical radiators with a heat sink plate, for example, a heat sink plate arranged and attached to a frame that has been processed with sheet metal, or a pair of meshing portions provided on both sides of the heat sink plate. Can be obtained by combining a plurality of heat sinks in a cylindrical shape. Therefore, this cylindrical heatsink can increase the number of heatsinks as necessary, and the heat radiation effect is enhanced by passing the airflow inside this cylindrical heatsink, so that the brightness suitable for the purpose is increased. An LED light source balloon projector capable of irradiating in all directions with a light amount can be obtained.

  The balloon-type projector obtained as described above can be repeatedly turned off and on without worrying about the relighting time. Unlike the HID lamp, a sufficient amount of light can be obtained immediately after lighting. Since it can be used, it can be turned off when it is not needed, and can be used again whenever necessary. When a battery is used as the power supply for the projector, a substantial extension of the usage time is expected, especially due to power saving. it can.

  Hereinafter, a specific configuration of a balloon-type projector according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a balloon-type projector according to an embodiment of the present invention. The balloon-type floodlight 1 (1A, 1B) has various forms depending on the usage, installation location, and the like, and FIG. 1 shows some examples. A balloon-type floodlight 1 (1A) shown in FIG. 1 (a) has a generator 2 or a storage battery as a power supply unit 3 mounted on a movable carriage 2 having wheels 2a. It has the whole structure which attached the support | pillar 4 and attached the balloon 5 to the front-end | tip. A balloon-type projector 1 (1B) shown in FIG. 1B has an overall configuration in which a balloon 5 is attached to the tip of an extendable support column 4 attached to a tripod 6.

  FIG. 2 is an explanatory view showing a configuration example of a light source unit arranged inside the balloon in the balloon projector according to the embodiment of the present invention. As shown in FIGS. 2A, 2 </ b> B, and 2 </ b> C, the light source unit 7 includes a cylindrical radiator 8 and an LED 9 disposed on the surface of the cylindrical radiator 8. Here, FIG.2 (c) has shown AA sectional drawing of Fig.2 (a) and FIG.2 (b).

  In the example shown in FIG. 2A, a blower 10 that combines cooling of the tubular radiator 8 and inflating the balloon 5 is arranged at the lower part of the tubular radiator 8. Between the blower 10, an LED power supply circuit unit 11 is installed. In this example, the airflow from the blower 10 passes through the inside of the tubular radiator 8 via the LED power supply circuit unit 11, and the airflow of the blower 10 passes through the tubular radiator 8 and the LED power supply circuit unit 11. Cooling at the same time.

  FIG.2 (b) is sectional drawing which cut the light source part 7 with the plane which passes along the central axis of a cylindrical heat radiator. In the example shown in FIG. 2B, the blower 10 is disposed on the upper part of the tubular radiator 8. In this example, since the blower 10 is installed on the upper part of the tubular radiator 8, the airflow W sucked by the blower 10 cools the LED power circuit unit 11 installed on the lower part of the tubular radiator 8. Then, after passing through the inside of the cylindrical radiator 8 and cooling the cylindrical radiator 8, it is discharged into the balloon 5 by the blower 10, and the balloon 5 is inflated. In this case, the LED power supply circuit unit 11 can be installed between the tubular radiator 8 and the blower 10, or can be installed inside the tubular radiator 8.

  In the example shown in FIGS. 2A, 2 </ b> B, and 2 </ b> C, the support column 12 supports the balloon 5, the light source unit 7, the blower 10, and the LED power supply circuit unit 11. In the example shown in FIG. 2C, four support columns 12 are provided outside the cylindrical radiator 8, but the number of support columns 12 is not limited to four.

  As shown in FIG. 2C, the cylindrical radiator 8 is configured by combining a plurality of radiator plates 14. Each of the heat radiating plates 14 has a flat surface on which one side has a comb-like heat radiating blade 14A and the other side is provided with the LED 9. In the example shown in FIG. 2 (c), the radiating blades 14A are extended at a predetermined interval over almost the entire space inside the cylindrical radiator 8. The width of the radiating wing 14A and the interval between the adjacent radiating wings 14A, 14A are set so as to obtain good heat radiating efficiency. As an example, assuming that the width of the radiating blade 14A is P and the interval Q between the adjacent radiating blades 14A, 14A, P / Q is preferably set to 1/1 to 1/8.

  FIG. 3 is a cross-sectional view showing another example of the tubular radiator in the embodiment of the present invention. As in the example shown in FIG. 2C, the example shown in FIG. 3 also has a cylindrical radiator 8 having heat dissipating blades 14A having a comb-like cross section on one side, and is made of heat-conductive material. A plurality of plates 14 are combined into a cylindrical shape so that the radiating blades 14A are on the inside.

  The example shown to Fig.3 (a) is the cylindrical heat radiator 8 which consists of the six heat sinks 14, and the space S which lets the airflow from the air blower 10 pass is formed in the cylinder. By forming this space S at an appropriate ratio, efficient heat dissipation can be achieved. FIG. 3 (b) shows the flow of air flow at the center of the cylinder so that more airflow flows between the radiating blades 14 </ b> A. A structure 15 that blocks the airflow is disposed. The structure 15 can be configured by the LED power supply circuit unit 11. By providing such a structure 15, the airflow mainly flows between the radiating blades 14 </ b> A, so that more efficient cooling is possible.

  FIG. 4 is an explanatory view illustrating the cross-sectional shape of the heat radiating plate constituting the cylindrical heat radiator used for the light source unit in the embodiment of the present invention. The heat radiating plate 14 includes a flat surface 14B on which the LEDs are arranged and heat radiating blades 14A formed on the opposite side. The heat sink 14 (14-1, 14-3) shown in FIGS. 4B and 4D includes a groove 14C for fixing the aluminum substrate on which the LED is mounted. The heat sink 14 (14-2, 14-3) shown in (d) includes meshing portions 14E, 14D for connecting adjacent heat sinks 14 to both ends thereof. Here, the meshing part 14E is a cylindrical convex part, and the meshing part 14D is a concave part with which the meshing part 14E is engaged.

  FIG. 5 is an explanatory view showing the arrangement / mounting form of the LEDs with respect to the heat sink. In order to arrange the LEDs on the heat sink 14, for example, as shown in FIG. 5 (a), the LED 9 is directly fixed to the heat sink 14 with screws or the like, or as shown in FIG. 5 (b). As shown in FIG. 5C, the LED 9 is mounted on the aluminum substrate 16 and fixed to the heat radiating plate 14 by means such as screws. Further, as shown in FIG. For example, the heat sink 14 may be inserted into the heat sink 14 having a groove 14 </ b> C for fixing 16. When the aluminum substrate 16 is inserted into the groove 14C, in order to improve the heat conduction from the aluminum substrate 16 to the heat radiating plate 14, it swells at the center of the surface 14B of the heat radiating plate 14 as shown in FIG. 14B1 may be provided. If the height of the bulge is too low, the contact between the aluminum substrate 16 and the surface 14B of the heat radiating plate 14 is deteriorated and the cooling efficiency is lowered, and if it is too high, it is difficult to insert the aluminum substrate 16 into the groove 14C of the heat radiating plate 14. Therefore, the optimum height is set according to the thickness of the aluminum substrate 16 and the width of the groove 14C.

FIG.6 and FIG.7 is explanatory drawing which showed the combination form of the heat sink in a cylindrical heat radiator. In order to form the cylindrical radiator 8 by combining various types of the radiator plate 14, for example, as shown in FIG. 6, the end portion of the radiator plate 14 is screwed 21 or the like using a sheet metal member (frame) 20. 7, as shown in FIG. 7, a plurality of heat dissipation plates are joined by joining the meshing portions 14 </ b> E and 14 </ b> D of the heat dissipation plate 14 (14-2 and 14-3) having the meshing portions 14 </ b> E and 14 </ b> D. 14 are combined. The thus obtained cylindrical radiator 8 has an LED 9 that emits a luminous flux of 30 lumens or more per cm ² by enabling efficient heat dissipation by flowing the air flow that inflates the balloon into the cylinder as a cooling air flow. Can be lit.

  FIG. 8 is an explanatory view showing another example of the balloon-type projector according to the embodiment of the present invention (the parts common to the above-mentioned example are denoted by the same reference numerals, and a part of the description is omitted). ). FIG. 8B shows a cross-sectional view taken along the line BB in FIG. In the example shown in FIG. 8, the column 12 in FIG. 2 is eliminated, and the cylindrical radiator 8 itself also serves as a support structure that supports the balloon 5. In this example, the blower 10 is located between the LED power circuit unit 11 and the tubular radiator 8, and the LED power circuit unit 11 is cooled by the airflow drawn by the blower 10. Moreover, you may provide the transparent protective member 13 so that LED9 arrange | positioned on the surface of the cylindrical heat radiator 8 may be covered for protection and waterproofing of LED9. Here, although the form of the columnar transparent protective member 13 is shown, the form of the transparent protective member 13 is not limited to this, and may be a polygonal columnar shape.

  When the cylindrical radiator 8 also serves as a support structure as in the example illustrated in FIG. 8, the cylindrical radiator 8 can employ the structure illustrated in FIGS. 6 and 7. In particular, as shown in FIG. 7, the heat sink 14 provided with the meshing portions 14E and 14D is used, the meshing portions 14E and 14D are meshed, and the plurality of heat sinks 14 are combined to form the cylindrical radiator 8. Thus, the meshing portions 14E and 14D have a reinforcing structure, and a stronger support structure can be obtained.

  As described above, the balloon-type projector 1 according to the embodiment of the present invention uses the airflow of the blower 10 that is continuously sent into the balloon 5 in order to inflate the balloon 5, so that the heat radiating plate of the light source unit 7 is used. By forcibly air-cooling 14, the light source unit 7 provided with the heat-sensitive LED 9 is efficiently cooled. At this time, the heat sink 14 is combined to form the tubular radiator 8, the inside of the tubular radiator 8 is used as an air flow path, and the heat dissipating blades 14A of the heat dissipating plate 14 are concentrated on the inner side to increase the heat radiation efficiency. It is increasing.

  In order to use an LED for a balloon type projector, a large amount of light equivalent to or more than that of a balloon type projector using a 300-watt or higher HID lamp on the market is required. A large light source that emits a light flux of 30,000 lumens or more over the entire surface of 8 is required. The balloon-type projector 1 according to the embodiment of the present invention was able to ensure the appropriate life of the LED while outputting this large amount of light even though there was a size restriction to fit in the balloon 5. In addition, the LED power circuit unit 11 for turning on the LED with a large light quantity of 30,000 lumens or more is also cooled by the air flow that inflates the balloon 5, so that the heat dissipation plate of the LED power circuit unit 11 can be made small. The light source unit 7 can be reduced in size and weight. The LED power supply circuit unit 11 can be installed anywhere on the lower end side, the upper end side, and the inner side of the cylindrical radiator 8, and the degree of design freedom is improved. The balloon-type projector 1 according to the embodiment of the present invention obtained as described above has sufficient brightness, can be repeatedly turned on and off as necessary, and is extremely easy to use. It was.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. The embodiments described in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose, configuration, or the like. Moreover, the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.

1, 1A, 1B: Balloon-type floodlight, 2: Cart, 3: Power supply unit, 4: Telescopic support,
5: Balloon, 7: Light source, 8: Cylindrical radiator, 9: LED, 10: Blower
11: LED power supply circuit section, 13: transparent protective member,
14: radiator plate, 14A: radiator blade, 14B: flat surface, 14C: groove,
14E, 14D: meshing part, 15: structure, 16: aluminum substrate,
20: Sheet metal member (frame), 21: Screw

Claims (7)

A balloon-type projector that includes a balloon, a light source unit disposed inside the balloon, and a blower that supplies air for inflating the balloon, and is capable of irradiating light in all directions,
The light source unit includes a cylindrical radiator and an LED disposed on the surface of the cylindrical radiator,
The cylindrical radiator is a combination of a plurality of heat sinks having a comb-shaped heat dissipating blade on one side and a flat surface on which the LED is disposed on the other side so that the heat dissipating blade is on the inside. Is configured in a cylindrical shape,
Arranging the blower so that the airflow by the blower passes through the inside of the tubular radiator and cools the LED power supply circuit unit,
The LED emits light with a luminous flux of 30 lumens or more per 1 cm ² of the surface of the cylindrical radiator and 30,000 lumens or more over the entire surface of the cylindrical radiator.   The balloon-type floodlight according to claim 1, wherein the LED power supply circuit section is disposed inside the cylindrical radiator.   The balloon-type projector according to claim 1, wherein the LED power supply circuit unit is disposed between the tubular radiator and the blower.   The balloon-type floodlight according to claim 1, wherein the blower is located between the cylindrical radiator and the LED power circuit section.   The balloon-type projector according to any one of claims 1, 3, and 4, characterized in that the heat dissipating blades are extended over substantially the entire inner side of the cylindrical heat radiator.   The balloon-type projector according to any one of claims 1 to 5, wherein the cylindrical radiator also serves as a support structure that supports the balloon.   The balloon-type projector according to any one of claims 1 to 6, wherein the cylindrical radiator includes a meshing portion for connecting the radiator plates adjacent to both ends of the radiator plate.

Images