KR20150012555A - Led lamp - Google Patents

Led lamp Download PDF

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Publication number
KR20150012555A
KR20150012555A KR1020130088204A KR20130088204A KR20150012555A KR 20150012555 A KR20150012555 A KR 20150012555A KR 1020130088204 A KR1020130088204 A KR 1020130088204A KR 20130088204 A KR20130088204 A KR 20130088204A KR 20150012555 A KR20150012555 A KR 20150012555A
Authority
KR
South Korea
Prior art keywords
lamp
lamp housing
led
mounting plate
heat sink
Prior art date
Application number
KR1020130088204A
Other languages
Korean (ko)
Inventor
유태승
Original Assignee
(주)휘일
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)휘일 filed Critical (주)휘일
Priority to KR1020130088204A priority Critical patent/KR20150012555A/en
Publication of KR20150012555A publication Critical patent/KR20150012555A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69Details of refractors forming part of the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/767Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00Point-like light sources

Abstract

The present invention discloses an LED (Light Emitting Diode) lamp in which a forced air flow is generated around a heat sink to improve a heat radiation efficiency. The present invention comprises a lamp housing, a lamp base, a heat sink, an LED module, a synthetic jet actuator, and an LED driver. The lamp housing has a space in which upper and lower ends are opened, and ventilation holes are formed along the circumferential direction to communicate with the space below the outer surface. The lamp base is mounted on the outer surface of the lamp housing. The heat sink is mounted on a lower portion of the lamp housing so as to extend downwardly of the lamp housing, a bore communicating with the space is formed at the center, cooling pins are formed on the outer surface so as to be exposed outside the lamp housing, Respectively. The LED module has a PCB mounted on the lower surface of the mounting plate, LEDs mounted on the lower surface of the PCB, and a lamp lens mounted on the mounting plate to cover the LEDs. The synchrotic jet actuator is mounted in the space so as to form an air passage between the ventilation holes and the cooling fins. The air flows through the ventilation holes and the air passage to cool the cooling fins, Flow. The LED driver is mounted in the space to control the operation of the LEDs and the synthetic jet actuator.

Description

LED lamp {LED lamp}
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an LED lamp (Light Emitting Diode lamp), and more particularly to an LED lamp in which an air flow is forcedly generated around a heat sink, will be.
In recent years, LEDs with high energy conversion efficiency of electric energy and energy-saving and environment-friendly effects have been increasingly used for general illumination as a next generation high efficiency light source. However, in the case of LED, more than 50% of the supplied power is converted into thermal energy, and accordingly, a rise in temperature causes decrease in light output and wavelength shift. Further, it is known that the lifetime of the LED is drastically reduced to lower the reliability. Therefore, in order to solve the heat dissipation problem of LED lighting, it is necessary to design a proper heat dissipation device.
The most suitable radiator for current LED lighting characteristics is a heat sink using natural convection. The technology of such LED lamp and heat sink is disclosed in Korean Patent Laid-Open No. 10-2012-0136687 entitled " LED lighting device and its manufacturing method ", Korean Patent No. 10-1129524 "LED lamp module and LED lamp module "And " LED illumination lamp with LED ", among others. The LED lighting apparatus includes a lamp housing, a printed circuit board (PCB) having a plurality of LEDs, a heat sink, and a lamp base. The heat sink is coupled to the lamp housing to expose it outside the lamp housing. The heat sink is formed in a cylindrical shape having a plurality of cooling fins formed on its outer surface.
However, since the conventional LED lamps use natural convection to cool the heat sink, the heat radiation efficiency of the heat sink is low, and the lifetime of the LED is reduced, thereby decreasing reliability.
The present invention is intended to solve various problems of the conventional LED lamp. SUMMARY OF THE INVENTION An object of the present invention is to provide a new LED lamp in which a forced air flow is generated around a heat sink to improve the heat radiation efficiency.
Another object of the present invention is to provide an LED lamp capable of improving the assemblability and reducing the production cost by a simple structure.
According to an aspect of the present invention, there is provided an LED lamp. An LED lamp according to the present invention includes: a lamp housing having a space in which upper and lower ends are opened, and a plurality of ventilation holes formed in a circumferential direction to communicate with a space at a lower portion of an outer surface; A lamp base mounted on an outer surface of the lamp housing; A plurality of cooling fins are formed on an outer surface of the lamp housing so as to be exposed to the outside of the lamp housing and a mounting plate is provided on a lower surface of the lamp housing A heat sink; An LED module having a PCB mounted to be in contact with a lower surface of the mounting plate, a plurality of LEDs mounted on a lower surface of the PCB, and a lamp lens mounted on the mounting plate to cover the plurality of LEDs; A plurality of cooling fins are provided in the space so as to form an air passage between the plurality of ventilation holes and the plurality of cooling fins, and air is introduced through a plurality of ventilation holes and an air passage for cooling the plurality of cooling fins, A synchrotron jet actuator for generating an air flow passing through the gap; A lamp base, an LED module electrically connected to the LED module and the synthetic jet actuator, and an LED driver mounted in space to control operation of the LEDs and the synchrotron jet actuator.
In the LED lamp according to the present invention, by forcibly blowing air between the cooling fins of the heat sink by the operation of a synthetic jet actuator installed on one side of the heat sink to cool the heat sink, It is possible to improve the heat radiation efficiency and ensure the life of the lamp. Further, the structure in which the synthetic jet actuator is coupled to the heat sink is simple, so that the assembling property is improved and the production cost can be reduced. Therefore, the LED lamp according to the present invention can be very usefully used for lighting of factories, warehouses, gymnasiums, auditoriums, and the like.
1 is a perspective view illustrating a configuration of an LED lamp according to the present invention.
FIG. 2 is a perspective view illustrating the structure of an LED lamp according to the present invention.
3 is a perspective view showing the reflector in the LED lamp according to the present invention.
4 is a front view showing a configuration of an LED lamp according to the present invention.
5 is a front view showing the configuration of the LED lamp according to the present invention.
6 is a cross-sectional view illustrating a structure of a heat sink and a synchrotron jet actuator in an LED lamp according to the present invention.
FIG. 7 is a cross-sectional view illustrating the air flow generated by the operation of the synthetic jet actuator in FIG. 6. FIG.
Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.
Hereinafter, preferred embodiments of the LED lamp according to the present invention will be described in detail with reference to the accompanying drawings.
First, referring to FIGS. 1 to 5, the LED lamp 10 according to the present invention has a hollow lamp housing 20. The lamp housing 20 is made of plastic by injection molding. Also, the lamp housing 20 may be made of a metal, for example, an aluminum alloy, having excellent thermal conductivity for heat dissipation. The lamp housing 20 has an interior space 22 and open ends 24 and 26 formed in the top and bottom respectively to communicate with the space 22. A male screw 28 is formed on the outer surface of the lamp housing 20. The male screw 28 is formed by a round screw. The open end 24 is formed at the upper end of the male screw 28. A sleeve 30 extends from the lower end of the male screw 28. An arch 32 is extended from the lower end of the sleeve 30 so as to extend in the downward direction. A plurality of bosses (bosses) 34 are formed on the inner peripheral edge of the arch 32 downward. A screw hole 34a is formed at the center of the bosses 34. [ A skirt 36 extends downward from the lower end of the arch 32. The open end 26 is formed at the lower end of the cut 36.
A plurality of ventilation holes 38 are formed along the circumferential direction on the outer surface of the sput 36 so as to communicate with the space 22. The ventilation holes 38 are formed as elongated rectangular holes formed along the longitudinal direction of the lamp housing 20. [ In other embodiments, vent holes 38 may be formed across the outer surface of the skirt 36 and the outer surface of the arch 32.
A lamp base (40) is coupled to the upper part of the outer surface of the lamp housing (20). The lamp base 40 is composed of a cylindrical screw base on which an internal thread 42 and a male thread 44 are formed on the inner and outer surfaces, respectively. The lamp housing 20 and the lamp base 40 are coupled by the engagement of the male screw 28 and the female screw 42. The male screw 44 of the lamp base 40 is a power connection mechanism for supplying commercial power and is coupled and connected to a socket by a screw fastening method. When the lamp housing 20 is made of an aluminum alloy, the insulation between the male screw 28 and the female screw 42 is insulated.
1 to 7, an LED lamp 10 according to the present invention includes a cylindrical heat sink (not shown) mounted on the open end 26 of the lamp housing 20 so as to extend downwardly of the lamp housing 20 And a heat sink (50). The heat sink 50 has a bore 52 communicating with the space 22 at the center and a plurality of cooling fins 54 formed along the circumferential direction on the outer surface. Only the upper end of the cooling fins 54 is engaged with the open end 26 of the lamp housing 20 and the remaining portion is exposed outside the lamp housing 20 for heat dissipation. The upper end of the cooling fins 54 is supported on the lower surface of the bosses 34 and is constrained in position to fit into the open end 26 of the lamp housing 20. [
A disk (Disc) 56 is mounted on the inner surface of the bore 52. A plurality of holes 58 are formed in the disk 56 along the circumferential direction. 6 and 7 show that the disc 56 is mounted on the inner surface of the bore 52 separately from the heat sink 50 but the disc 56 is integral with the heat sink 50 . A mounting plate (60) is coupled to the lower end of the heat sink (50). A plurality of bolt holes 62 are formed at regular intervals along the circumferential direction at the edge of the mounting plate 60 so as to be aligned with the screw holes 34a of the bosses 34. [ A groove 64 is formed at the center of the lower surface of the mounting plate 60. The heat sink 50, the disk 56 and the mounting plate 60 may be made of a material having a high thermal conductivity, for example, aluminum or magnesium. In some embodiments, the mounting plate 60 may be configured as an integral part of the heat sink 50. Further, the disk 56 and the mounting plate 60 may be formed as a single part and coupled to the lower end of the heat sink 50.
(LED) module (Light Emitting Diode Module) 70 is mounted on the lower surface of the mounting plate 60. The LED module 70 includes a PCB 72 mounted on the lower surface of the mounting plate 60 and a plurality of LEDs 74 mounted on the PCB 72. The PCB 72 is fitted so as to be fixed to the groove 64 of the mounting plate 60. A lamp lens 76 is mounted on the lower surface of the mounting plate 60 so as to cover the LED module 70. The lamp lens 76 is formed of a convex lens. A plurality of bolt holes 76a are formed in the edge of the lamp lens 76 so as to be aligned with the screw holes 34a of the bosses 34. [ The lamp lens 76 is coupled to the lower surface of the mounting plate 60 by fastening a plurality of screws 78 thereto. Each of the screws 78 passes between the bolt holes 76a of the lamp lens 76, the bolt holes 62 of the mounting plate 60 and the cooling fins 54 of the heat sink 50, Are screwed into the screw holes (34a) of the guide grooves (34). The LED module 70 and the heat sink 50 are firmly coupled to the lamp housing 20 by fastening the screws 78. [
As shown in FIGS. 2 and 5 to 7, the LED lamp 10 according to the present invention includes a heat sink 50 for generating a forced air flow around the heat sink 50 for cooling the heat sink 50, And a tick jet actuator 80. Synthetic jet actuator 80 is composed of "SynJet" (trade name) of Nuventix, Inc. of the United States, and Manufacturer's part number (Mfr Part #) NX200102.
 The synchrotic jet actuator 80 is mounted in the space 22 to form an air passage 90 between the vent holes 38 and the cooling fins 54. The synchrotic jet actuator 80 has a plurality of orifices 82 formed on one side of the outer surface to generate an air flow by suction and discharge of air. The orifice (82) is disposed in the air passage (90) and communicates with the ventilation holes (38). A plurality of projections (84) are formed on the lower surface of the synchrothed jet actuator (80). The projections 84 are fitted into the holes 58 of the disk 56 and are engaged. The position of the synchrotic jet actuator 80 is determined by the engagement of the projections 84 with the apertures 58 in the disk 56.
5, the LED lamp 10 according to the present invention includes an LED driver (Light Emitting Diode Driver) 100 mounted in the space 22 of the lamp housing 20. As shown in FIG. The LED driver 100 controls the power supplied from the lamp base 40 to operate the LEDs 74 and the synchrotic jet actuator 80. The LED driver 100 is electrically connected to the lamp base 40 by a pair of first connector cables 110a and 110b. The first connector cables 110a and 110b connect the lamp base 40 and the LED driver 100 through the open end 24.
The LED driver 100 is electrically connected to the PCB 72 of the LED module 70 by the second connector cable 112. The LED driver 100 is electrically connected to the synchrothed jet actuator 80 by a third connector cable 114 to control the operation of the synchrothed jet actuator 80. As shown in Figs. 1, 2, 4 and 5, the reflection shade 120 is mounted on the mounting plate 60 so as to surround the lamp lens 76. A hole 122 through which the lamp lens 76 is fitted is formed at the center of the reflector 120.
The LED lamp 10 according to the present invention having such a configuration can supply power to the LEDs 74 under the control of the LED driver 100 when the lamp base 40 is connected to a socket for supplying commercial power do. Light generated by the operation of the LEDs 74 is reflected through the lens lamp 10. The reflector 120 reflects the light of the LEDs 74 to improve illumination efficiency. Heat generated during operation of the LEDs 74 is absorbed by the heat sink 50 through the PCB 72 and the mounting plate 60. The cooling fins 54 of the heat sink 50 are cooled by heat radiation due to natural convection.
Referring to Figures 6 and 7, when the synchrotic jet actuator 80 is actuated, air is sucked and discharged alternately through the orifices 82. Air is sucked into the synchrotic jet actuator 80 through the vent holes 38, the air passage 92 and the orifices 82, as shown by the arrow "A" Air flows out of the synchrothed jet actuator 80 through the orifices 82 and into the cooling fins 54 as shown by the arrow "B" . Accordingly, the heat dissipation effect of the cooling fins 54 is greatly improved, thereby improving the illumination efficiency and ensuring the life of the LED lamp 10.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
10: LED lamp 20: Lamp housing
28: male thread 38: ventilation hole
34: Boss 40: Lamp base
42: female thread 50: heat sink
54: cooling pin 60: mounting plate
70: LED module 72: PCB
74: LED 78: Screw
76: Lamp lens 80: Synthetic jet actuator
82: Orifice 90: Air passage
100: LED driver 120: reflector

Claims (4)

  1. A lamp housing having a space in which upper and lower ends are opened, and a plurality of ventilation holes formed in the lower part of the outer surface in a circumferential direction so as to communicate with the space;
    A lamp base mounted on an outer surface of the lamp housing;
    A plurality of cooling fins are formed on an outer surface of the lamp housing so as to be exposed outside the lamp housing, a mounting plate mounted on a lower portion of the lamp housing to extend downwardly of the lamp housing, A heat sink provided on the lower surface;
    An LED module having a PCB mounted to be in contact with a lower surface of the mounting plate, a plurality of LEDs mounted on a lower surface of the PCB, and a lamp lens mounted on the mounting plate to cover the plurality of LEDs;
    A plurality of cooling holes formed in the plurality of cooling holes, and an air passage formed between the plurality of air holes and the plurality of cooling fins, the air being introduced through the plurality of ventilation holes and the air passage for cooling the plurality of cooling fins A synchrotron jet actuator for generating an air flow passing between the plurality of cooling fins;
    An LED driver electrically connected to the lamp base, the LED module and the synchrotron jet actuator, respectively, and an LED driver mounted in the space to control operation of the LEDs and the synchrotron jet actuator.
  2. The method according to claim 1,
    A plurality of bosses are formed in a space of the lamp housing to support the upper ends of the plurality of cooling fins, and a plurality of bolt holes are formed so as to be aligned with each other along the circumferential direction of the mounting plate and the lamp lens, A plurality of bolts of the lamp lens, bolts of the mounting plate, and a plurality of screws fastened to the plurality of bosses through the plurality of cooling fins so that the heat sink and the LED module are fixed to the lamp housing; LED lamps.
  3. 3. The method according to claim 1 or 2,
    Wherein the lamp base is made of a screw base having a female screw and a male screw is formed on an upper outer surface of the lamp holder so as to be fastened to the female screw.
  4. The method of claim 3,
    Wherein the lamp housing has an arch formed in a lower portion of the male screw so as to extend in a downward cross sectional area and a skirt extending downward from a lower end of the arch and the plurality of ventilation holes are formed on an outer surface of the skirt And an upper end of the heat sink is fitted and coupled to a lower end of the slit, and a reflection shade is formed on a lower surface of the mounting plate so as to surround the lamp lens, Further mounted LED lamps.
KR1020130088204A 2013-07-25 2013-07-25 Led lamp KR20150012555A (en)

Priority Applications (1)

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KR1020130088204A KR20150012555A (en) 2013-07-25 2013-07-25 Led lamp

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Application Number Priority Date Filing Date Title
KR1020130088204A KR20150012555A (en) 2013-07-25 2013-07-25 Led lamp

Publications (1)

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KR20150012555A true KR20150012555A (en) 2015-02-04

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KR1020130088204A KR20150012555A (en) 2013-07-25 2013-07-25 Led lamp

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106189654A (en) * 2016-05-23 2016-12-07 庄可香 A kind of environment-friendly type LED Down lamp with function of removing formaldehyde

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106189654A (en) * 2016-05-23 2016-12-07 庄可香 A kind of environment-friendly type LED Down lamp with function of removing formaldehyde

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