JP2019121502A - Mercury lamp type led projector - Google Patents

Abstract

To reduce occurrences of failures due to heat or the like without taking measures for a stabilizer in a mercury lamp type LED light source.SOLUTION: A mercury lamp type LED projector 1 includes an LED light source part 100, a power supply part 400, and a cooling fan 310. The LED light source part 100 includes a plurality of reed-shaped LED boards 110, and one disk-type LED substrate 120. The LED light source part 100 is columnar-shaped as a whole. A capacitor 410 of the power supply part 400 is a heat resistant capacitor. The cooling fan 310 is arranged in the vicinity of the two ends of the columnar shape, and is heat resistant.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mercury lamp type LED projector, and more particularly to a technology for improving the quality and life of the mercury lamp type LED projector and expanding the application range.

In recent years, from the viewpoint of power saving, lighting fixtures tend to be changed from incandescent lamps and fluorescent lamps to LED light sources. This is because the LED light source uses less power and has a long life as compared to incandescent bulbs and fluorescent lamps.
Similar moves are underway for streetlights and mercury lamps used in large facilities. A mercury lamp can generate high brightness, but it uses large power and has a relatively short life.
However, unlike a general incandescent lamp, a mercury lamp requires a high voltage at start-up, so a ballast is required to perform voltage adjustment including the high voltage according to the state of the mercury lamp. Therefore, in order to replace with a general LED light source, it is necessary to work not only for the mercury lamp bulb but also for the entire lighting equipment including the ballast, and the cost of changing to the LED light source will increase significantly There was also.
In addition, if a general LED light source is attached without carrying out the construction of the entire lighting apparatus, an unexpected voltage is applied to the LED light source, causing a failure or destruction of the LED light source.

  On the other hand, LED light sources compatible with mercury lamps are also being developed. It is a mercury lamp type LED light source provided with a power supply unit corresponding to the high voltage from the ballast of the mercury lamp. With this LED light source, it is possible to promote LEDification by changing only the mercury lamp bulb to the mercury lamp type LED light source.

However, since the mercury lamp type LED light source has a high luminance output, the LED element generates high heat, and the temperature in the vicinity of the LED light source may become large. At that time, a failure may occur due to deterioration or the like of components in the LED light source, and the life of the light source may be significantly shortened.
Therefore, even with a mercury lamp type LED light source, a configuration for reducing the occurrence of failure due to heat or the like has been required.

In addition, there are many types of mercury lamps, and there are lamps of various voltages, and even if it is called a mercury lamp type LED light source, it can not cope with lighting equipment using a high voltage ballast, There were also cases where the failure occurred frequently.
Therefore, there has been a demand for an LED light source that covers the voltage handled by many mercury lamps.

Various techniques have conventionally been proposed for such problems. For example,
An illumination lamp (see Patent Document 1) in which the lifetime of the LED element is kept long has been proposed and is a known technique. More specifically, the illumination lamp has a light emitting surface on which a light source is mounted, and a substrate having a through hole formed between an area on the light emitting surface where the light source is not mounted and a back surface area of the area. A cover covering the light source and the substrate with a predetermined gap and covering the light source and the substrate, a silicone resin filled in between the light emitting surface and the cover, and the light emitting surface disposed so as to close the through holes. And a porous member.
According to this technique, the heat of the LED element can be dissipated by the holes provided in the LED substrate. However, there is no description about the countermeasure for the deterioration of parts due to high temperature, and the solution of the above problem has not been achieved.

JP, 2016-177938, A

  This invention makes it a subject to solve a problem by LED board shape and component selection in view of the problem that generation | occurrence | production of the failure by heat etc. generate | occur | produces in a mercury-lamp-type LED light source.

  In order to solve the above-mentioned subject, the mercury lamp type LED floodlight concerning the present invention consists of a LED light source part, a power supply part, and a cooling fan, and a LED light source part has a plurality of strip type LED boards and one circle. A plate-type LED substrate, and the whole of the LED light source portion is in a columnar shape, the capacitor of the power supply portion is a heat-resistant capacitor, the cooling fan is disposed near both end portions of the column, The means is a mold cooling fan.

  Further, in the present invention, there is a gap between the plurality of strip-type LED substrates.

  Furthermore, in the present invention, the heat-resistant life of the heat-resistant capacitor is 105 ° C. and 1000 hours or more.

  Still further, in the present invention, the heat resistant life of the heat resistant cooling fan is 105 ° C. and 1000 hours or more.

  Furthermore, in the present invention, the capacitor is a high breakdown voltage capacitor.

  And, in the present invention, the withstand voltage of the capacitor is 280 V or more.

  And furthermore, the present invention uses an E-type cap as a means.

  ADVANTAGE OF THE INVENTION According to the mercury-lamp-type LED light projector which concerns on this invention, lifetime improvement of a LED light projector is possible, and it is effective in the improvement of the performance quality of the LED light projector replaced with a mercury lamp.

It is a general view showing an embodiment of a mercury lamp type LED floodlight concerning the present invention. It is an exploded view of a mercury lamp type LED floodlight concerning the present invention. It is an explanatory view about a system of a mercury lamp type LED floodlight concerning the present invention. It is a characteristic view regarding the life characteristic of the parts of the mercury lamp type LED floodlight concerning the present invention.

The mercury lamp type LED light projector 1 according to the present invention is characterized most in that the occurrence of a failure due to heat or the like can be reduced.
Hereinafter, an embodiment of a mercury lamp type LED light projector 1 according to the present invention will be described based on the drawings.
The overall shape and shape of each part of the mercury lamp type LED light projector 1 shown in the present embodiment are not limited to the examples described below, and are within the scope of the technical idea of the present invention, that is, the same function. It can be changed within the range of the shape, size, etc. which can exhibit an effect.

The present invention will be described according to FIGS. Fig.1 (a) shows the whole perspective view of this invention, FIG.1 (b) shows the same front view, FIG.1 (c) shows the same side view. FIG. 2 shows an exploded view of the present invention.
The mercury lamp type LED floodlight 1 is an LED floodlight which is a substitute for the bulb portion of the mercury lamp, and like the mercury bulb, is attached to the socket portion of the lighting apparatus.
The mercury lamp type LED projector 1 mainly includes an LED light source unit 100, a cooling unit 300, a power supply unit 400, an appearance unit 500, and a frame unit 200. As a whole, it has a shape resembling a mercury lamp light bulb, and has an elongated columnar shape, and has a length that can be accommodated inside an umbrella (shade body) provided in a conventional mercury lamp.

The LED light source unit 100 is a portion that emits light as illumination, and includes a disk-type LED substrate 120 and a plurality of strip-type LED substrates 110. The LED elements 130 are mounted at high density on the surfaces of the strip-shaped LED substrate 110 and the disk-shaped LED substrate 120. There are ten or more strip-shaped LED substrates 110, which constitute the side surfaces of the pillars. The LED elements 130 are arranged in high density in two rows in the longitudinal direction of the strip-shaped LED substrate 110. The disk-type LED substrate 120 constitutes a tip portion of the LED light source unit 100, and is a circular or polygonal substrate. The LED elements 130 are arranged concentrically.
The LED element 130 is an element more efficient than an incandescent lamp or a fluorescent lamp, but generates a large amount of heat in order to flow a large current. Since the LED elements 130 are arranged relatively densely, the strip-type LED substrate 110 and the disk-type LED substrate 120 become hot due to the heat of the LED elements 130. Therefore, a structure for heat dissipation is required.
One of the configurations for heat dissipation will be described. There is a gap 150 between the strip-shaped LED substrates 110, and the heat in the LED light source unit 100 is discharged from the gap 150. In addition, a large number of holes 140 are opened in the disc LED substrate 120, and the same heat is discharged from the holes 140.
The LED light source unit 100 according to the present invention is referred to as a cone-shaped LED light source unit 100 since the LED elements 130 are regularly arranged in the axial direction of the column in the form of an elongated column as the entire LED light source unit 100.

The cooling unit 300 is a portion that creates a flow of air to the LED light source unit 100 to release the heat of the LED element 130 to the outside. It comprises a cooling fan 310 and a fixing bracket 320 for fixing the cooling fan 310. The cooling units 300 are disposed one by one at both ends of the LED light source unit 100. As the flow of air, for example, air is sent from the cooling unit 300 at the proximal end of the LED light source unit 100 to the LED light source unit 100. It is conceivable to discharge air from the cooling unit 300 at the tip of the LED light source unit 100 to the outside of the disk-type LED substrate 120. As a result, air flows smoothly from the proximal end to the distal end of the LED light source unit 100 as a whole.
In addition, the cooling unit 300 at the base end of the LED light source unit 100 also has a function to dissipate the heat of the power supply unit 400.

  The power supply unit 400 converts the AC voltage supplied from the base 520 into a DC voltage suitable for the LED light source unit 100. The AC voltage reaches about 100 V to 277 V depending on the control of the ballast 610. The alternating voltage is smoothed by a capacitor 410 or the like to obtain a stable direct voltage.

The appearance part 500 is the structure of the base part of the mercury lamp type LED light projector 1, is comprised from the cabinet 510 and the nozzle | cap | die 520, and the power supply part 400 is arrange | positioned in it. The base 520 is a portion attached to the socket 820 of the lighting device, and has the same shape as the mercury lamp 800. It is type E, and type E39 is common. The cabinet 510 is a portion that generally covers between the base 520 and the LED light source unit 100, and is made of a durable and insulating resin. A hole is provided to introduce air for heat release.
The frame unit 200 is a framework for attaching the LED light source unit 100. In order to correspond to the gap 150 between the strip-shaped LED substrates 110, it is in the form of a net that air can easily pass through. The cooling fans 310 are attached near both ends of the frame portion 200.

Next, the system configuration of the mercury lamp will be described with reference to FIG. FIG. 3A shows a system using a mercury lamp 800. FIG. 3 (b) shows a system using a general light LED bulb 810. FIG. 3C shows a system of the mercury lamp type LED projector 1.
First, an example of the mercury lamp 800 will be described (FIG. 3A). The commercial power supply 700 is power normally supplied at 100V or 200V. The power is adjusted by the lighting device power supply unit 600 in the lighting device, and supplied to the mercury lamp 800 via the socket 820. The power supply voltage is converted into a voltage corresponding to the mercury lamp 800 by the ballast 610 in the lighting apparatus power supply unit 600. The ballast 610 limits the inrush current to the mercury lamp 800 at the time of power on and prevents the mercury lamp 800 from being destroyed. When the current to the mercury lamp 800 is stable, it becomes a predetermined AC voltage value. Since the magnitude of the inrush current and the time to the stabilization of the current differ depending on the type of the corresponding mercury lamp bulb 800, a ballast 610 matched to the mercury lamp bulb 800 is provided for each lighting device.

The case where the general light LED bulb 810 is used will be described (FIG. 3B). The general light LED bulb 810 operates with direct current. Further, the voltage value to be used is lower than that of the mercury lamp 800. Therefore, when simply used in place of the mercury lamp 800, it is necessary to modify the lighting device power supply unit 600. The content of the modification is to change to an ACDC converter 620 that converts alternating current to direct current without using the ballast 610 in the lighting device power supply unit 600. The ACDC converter 620 converts a commercial power supply voltage of 100 V or 200 V into a predetermined DC voltage. The general light LED bulb 810 can be stably lit by the power supply voltage converted into direct current by the ACDC converter 620.
As a matter of course, since the lighting device power supply unit 600 is often embedded in a lighting device or installed on a ceiling or the like, repair of the lighting device power supply unit 600 requires a lot of time and cost. There are many.

  The case where the mercury lamp type LED projector 1 is used will be described (FIG. 3 (c)). The mercury lamp type LED projector 1 includes a circuit that converts the AC high voltage generated by the ballast 610 into a DC voltage suitable for the LED light source. Therefore, the light source can be turned into an LED only by replacing the mercury lamp type LED projector 1 in place of the mercury lamp 800 using the ballast 610 in the lighting device power supply unit 600 as it is. As described above, according to the mercury lamp type LED projector 1, the mercury lamp 800 can be made into an LED at low cost and in a short time.

As described above, the LED element 130 has a characteristic capable of emitting high luminance with low power as compared with a mercury lamp, an incandescent lamp, and a fluorescent lamp, but since a large current flows, the LED element 130 generates heat. Since the LED elements 130 are arranged relatively densely, the strip-type LED substrate 110 and the disk-type LED substrate 120 become hot due to the heat of the LED elements 130. Therefore, a structure for heat dissipation is required.
Therefore, the air around the mercury lamp LED light emitter 1 is efficiently taken in, and the heat of the LED element 130 is air-cooled to be released to the outside of the mercury light LED light emitter 1. Air enters the inside of the mercury lamp LED light projector 1 from the hole of the cabinet 510, absorbs the heat of the power supply unit 400, and is forcibly fed into the LED light source unit 100 by the cooling unit 300. Part of the air is released from the gap 150 between the strip-shaped LED substrates 110, and the other portion is forced from the hole 140 of the disk-shaped LED substrate 120 by the cooling unit 300 at the tip of the LED light source unit 100. It is released to the outside.
With this structure, since the air at normal temperature is always supplied to the LED light source unit 100 from the inside, efficient air cooling can be performed.

Next, the product life of the mercury lamp type LED light projector 1 will be described with reference to FIG. By performing efficient air cooling, the temperature of the entire mercury lamp type LED projector 1 can be lowered, but it can not be made the same as the ambient temperature. Therefore, the life of each part at high temperature becomes a problem.
For example, the operating temperature range as the product specification of the mercury lamp type LED light projector 1 is set to -20 ° C to 45 ° C. It is assumed that the temperature of the mercury lamp type LED light projector 1 is suppressed to about 5 ° C. higher than the ambient temperature by the cooling by the cooling fan 310 or the like. Then, the temperature of the part may be maintained at 50 ° C.

  FIG. 4B is a graph of the heat resistant life of the capacitor 410 used in the power supply unit 400. The vertical axis represents the ambient temperature of the capacitor, and the horizontal axis represents the time until the capacitor fails. In the graph, C represents a normal heat-resistant capacitor, and D represents a high heat-resistant capacitor. Since the ambient temperature of the capacitor and the temperature of the capacitor are almost the same, the lifetime of the ordinary capacitor is about 10,000 hours in view of the lifetime of the ambient temperature of 50.degree. On the other hand, the life of the heat-resistant capacitor is about 50,000 hours. The 50,000 hours is about 5.7 years in continuous use, and can be said to have a sufficiently long life as compared with a general mercury lamp 800. The heat resistance of the C capacitor is 85 ° C. for 1000 hours, and the heat resistance of the D capacitor is 105 ° C. for 1000 hours.

  Similarly, a cooling fan will be considered along FIG. 4 (a). The vertical axis of the graph is the temperature around the cooling fan, and the horizontal axis represents the time until the cooling fan fails. A in the graph represents a normal cooling fan, and B represents a highly heat-resistant cooling fan. The heat-resistant cooling fan is, for example, a fan with less deterioration of the bearing portion. Since the temperature around the cooling fan and the temperature of the cooling fan are almost the same, considering the life at an ambient temperature of 50 ° C., the life of a normal cooling fan is about 30,000 hours. On the other hand, the service life of the highly heat resistant cooling fan is far beyond about 50,000. Therefore, by using a highly heat-resistant cooling fan, it can be said that the life is sufficiently long as compared with a general mercury lamp 800. In addition, from the slope of the graph, in order for the life to be about 50,000, it is sufficient that the characteristics be B '(dotted line) or more. That is, it is considered that the heat resistance characteristic may be about 105 ° C. for 1000 hours or more.

As described above, even with the mercury lamp type LED projector, the occurrence of failure due to heat or the like can be reduced by performing the efficient heat discharge structure and the appropriate component selection.
Although the mercury lamp type LED light projector has been described in the present embodiment, it is needless to say that the same effect can be obtained by using a metal halide lamp.

  Moreover, as a result of investigating about the lighting apparatus of various mercury lamps in order to respond | correspond to various mercury lamp light bulbs 800, the knowledge that the output of the ballast 610 is the range of 100V-277V was acquired by most apparatuses. Therefore, by setting the withstand voltage of the capacitor 410 to 280 V or more, the mercury lamp type LED projector 1 can be used for the lighting equipment of most mercury lamps.

  As described above, by appropriately selecting the components used for the mercury lamp type LED projector, the LED projector can be adapted without leakage to many mercury lamp devices.

  The mercury lamp type LED projector according to the present invention is considered to have great industrial applicability as a technology for improving the performance deterioration due to the heat generation of the LED.

DESCRIPTION OF SYMBOLS 1 mercury lamp type LED light projector 100 LED light source part 110 strip-type LED board 120 disk type LED board 130 LED element 140 hole 150 clearance 200 frame part 300 cooling part 310 cooling fan 320 fixing bracket 400 power supply part 410 capacitor 500 external appearance part 510 cavi 520 base 600 lighting equipment power supply part 610 ballast 620 ACDC converter 700 commercial power supply 800 mercury lamp bulb 810 LED bulb 820 socket for general light

Claims (7)

A mercury lamp type LED projector comprising an LED light source unit, a power supply unit, and a cooling fan,
The LED light source unit includes a plurality of strip-type LED substrates and one disk-type LED substrate, and the entire LED light source unit has a columnar shape,
The capacitor of the power supply unit is a heat-resistant capacitor,
A mercury lamp type LED floodlight characterized in that the cooling fan is a heat-resistant cooling fan disposed near both ends of the column.   The mercury lamp type LED floodlight according to claim 1, wherein there is a gap between the strip-type LED substrates.   The mercury lamp-type LED floodlight according to claim 1 or 2, wherein the heat-resistant life of the heat-resistant capacitor is 105 ° C for 1000 hours or more.   The mercury lamp-type LED floodlight according to any one of claims 1 to 3, wherein the heat resistant life of the heat resistant cooling fan is 105 ° C for 1000 hours or more.   The mercury lamp type LED floodlight according to any one of claims 1 to 4, wherein the capacitor is a high withstand voltage capacitor.   The withstand voltage of the said capacitor | condenser is 280 V or more, The mercury-lamp-type LED floodlight in any one of the Claims 1-5 characterized by the above-mentioned.   The mercury lamp type LED floodlight according to any one of claims 1 to 6, characterized in that it has an E-type base.