KR20120135756A - Light emitting diode bulb - Google Patents

Abstract

PURPOSE: An LED(Light Emitting Diode) bulb is provided to form a circulating structure of internal air and external air of a housing by forming an air circulating hole on the top of the housing. CONSTITUTION: A housing(20) is combined with a spread cover(10) having a hemisphere shape. The housing is formed of a thermal conductor. An LED module(50) is formed in the inside formed through the spread cover and the housing. The LED module includes a substrate including an LED. An inverter(70) supplies a DC current to the LED module. The LED bulb is composed of sockets(30) combined with the housing. An endothermic plate(40) is formed in the housing while sticking to the LED module. The endothermic plate is formed of aluminum materials. The endothermic plate absorbs heat generated from the LED.

Description

LED bulb {Light emitting diode bulb}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode (LED) light bulb. Specifically, a heat absorbing plate is formed in a housing of a synthetic resin in which an inner space is formed, and the heat absorbing plate absorbs heat generated from the LED element. The present invention relates to an LED bulb in which air inside the housing and external air are circulated by forming an air circulation hole in the upper portion of the housing.

Currently, discharge lamps such as fluorescent lamps, incandescent lamps and halogen lamps are used as light sources for indoor lighting in homes and offices. Since the discharge lamp has a high driving voltage, the energy consumption is large due to the boost of the power, and when discharged, the discharge lamp discharges discharge gas such as mercury, which is harmful to the human body or the environment.

In particular, the European Union (EU) prohibits the use of hazardous metals such as PB (PolyBromide Binpenyl) and PBDE (PolyBrominated Diphenyl Ether) in electrical and electronic products such as lead, mercury, cadmium and hexavalent chromium (Cr6 +). Established Restriction of Use of Hazardous Substances (RoHS) and Waste Electrical and Electronic Equipment Directives (WEEE) that require producers to pay for the recycling of waste electrical and electronic products. This has been implemented since July 1, 2006.

Accordingly, the necessity of research and development of a new luminaire that can replace a luminaire such as a fluorescent lamp currently used is emerging.

In addition, with the rapid development of LED-related technology, white LEDs emitting white light using blue LEDs and phosphors have emerged. Small size, low power consumption, semi-permanent life, no harmful emissions such as ultraviolet light, no environmentally friendly lighting source without mercury and discharge gas. have.

Looking at the LED bulb of the prior art,

An LED module including a PCB (process control block) on which at least one LED element is mounted, and a radial shape in a vertical direction along an axial direction from an outer circumferential surface thereof. A plurality of heat dissipation protrusions are formed to protrude from the outer peripheral surface, the screw thread is formed on one side, the heat conductor is formed, the upper surface is formed by the upper housing is sealed, and the screw thread to enable screwing with the screw wire formed on one side of the housing The diffusion cover, the inverter for supplying a DC current to the LED module, the connector formed to be one-touch fastening with the inverter, and is formed between the LED module and the housing to perform heat radiation of the heat generated from the LED element A heat sink formed integrally with the housing by insert injection when the housing is formed, and the It consists of a socket housing and is fastened.

In general, the LED bulb has advantages such as fast lighting speed and low power consumption, but the light emitting part is composed of a plurality of LED elements in the LED module, and thus generates a large amount of heat.

The LED bulb of the related art has a heat dissipation protrusion formed on the outer circumferential surface of the housing in order to emit heat generated in the LED device, which has a complicated structure and a heavy problem.

In addition, the LED bulb of the prior art has a problem that the upper surface is configured in the housing which is in contact with the heat sink that radiates heat generated from the LED device, so that the heat generated from the LED device is not discharged into the interior space of the housing.

In addition, the LED bulb of the prior art has a problem that the temperature of the housing is increased because the air inside the housing is not circulated with the outside.

In addition, the LED bulb of the prior art has a problem that the inner space of the housing is narrow in order to increase the area of the heat dissipation projection as possible, so that the internal space of the housing cannot be efficiently used for heat dissipation.

In addition, the LED bulb of the prior art has an indirect problem that the housing is composed of a heat dissipation protrusion and the upper surface is reduced waste and productivity of material costs.

In addition, the LED bulb of the prior art has a problem that the production process is complex and expensive production cost by integrally forming the heat sink in the housing by the insert injection method.

In addition, the LED bulb of the prior art has a problem that can not add a heat sink.

The present invention was created in order to solve the above problems, and forms a housing of the synthetic resin, the inner space of the upper and lower parts penetrates from the lower part to the upper part, and has a heat absorbing property on the upper part of the housing. A heat absorbing plate made of aluminum or the like is formed to closely adhere the board of the LED module to the heat absorbing plate so that the heat generated from the plurality of LED elements is absorbed by the heat absorbing plate to form a housing having no radiating protrusions and an upper surface. The structure is simplified and the weight is reduced, and the heat absorbing plate which does not insert the insert into the housing reduces the production cost, and forms an air circulation hole in the upper part of the housing, thereby circulating the LED bulb which circulates the inside air and the outside air of the housing. To provide.

The LED bulb according to the present invention includes a hemispherical diffusion cover, a housing coupled to the diffusion cover, a housing formed of a heat conductor, a diffusion cover, and an LED formed on an interior of the housing and mounted with an LED element. LED (LED) module, an inverter for supplying a DC current to the LED (LED) module, the LED bulb consisting of a socket that is fastened to the housing, the LED bulb is formed in close contact with the LED module and formed in a constant thickness The heat absorbing plate made of aluminum is configured.

In addition, the present invention, the housing is composed of a synthetic resin to form an inner space through which the upper and lower portions without the heat dissipation protrusion and the upper surface.

In addition, the present invention is that the lower inside of the housing to which the socket is coupled is configured up and down and protruding inverter coupling pieces on the inner peripheral surface.

In addition, the present invention is configured to a pair of air circulation holes penetrated before and after the upper portion of the inverter coupling piece to the lower portion of the socket is coupled to the housing.

LED light emitting diode (LED) light bulb according to the present invention is composed of a heat dissipation protrusion and the upper surface of the housing is simple, the structure of the housing is reduced in weight, there is a high productivity effect.

In addition, the present invention has an effect that the temperature of the heat absorbing plate and the housing air is lowered by forming an air circulation hole in the upper portion of the housing to circulate the inside air and the outside air.

In addition, the present invention is the air circulation path is formed inside the housing by the housing and the inverter while the outside air flows through the internal small space into the inner large space to cool the heat absorbing plate and the inverter by natural convection, the heat dissipation is It has a good effect.

In addition, the present invention has an effect that the heat absorbing plate is expandable without insert injection into the housing, the production process of the housing is reduced to reduce the production cost.

In addition, the present invention has the effect of forming the heat absorbing plate in the housing in which the inner space through which the upper and lower portions are formed to cool the heat absorbing plate.

1: LED bulb cross-sectional view of the prior art.
2 is an exploded perspective view of the LED bulb of the present invention.
Figure 3 is a cross-sectional view of the inverter LED bulb of the present invention.
4 is a sectional view from the front of the inverter of the present invention LED bulb.
5 is a perspective view of a heat absorbing plate in the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, although the Example of this invention is described in detail, this invention is not limited to a following example, unless the summary is exceeded.

2 is an exploded perspective view of the present invention LED light bulb of FIG. 2, a cross-sectional view of the present invention LED light bulb of FIG. 3, a cross-sectional view of an inverter front view of the present invention LED light bulb of FIG. 4, and an endothermic heat of the present invention of FIG. 5. It demonstrates with the perspective view of a board.

The present invention, in the LED light bulb (Light emitting diode bulb), the diffusion cover 10, the housing 20, the LED (LED) module 50, the inverter 70, the socket 30 and the heat absorbing plate 40 of It is made of a large configuration, the housing 20 is made of a small configuration of the inverter coupling piece 21 and the air circulation hole (23).

The diffusion cover 10 has a hemispherical shape, and threads are formed at the ends of the diffusion cover 10 and the upper surface of the housing 20, respectively, so that the diffusion cover 10 and the housing 20 are screwed together. The cover inner space (c) is formed by the coupling.

The diffusion cover 10 is mounted to the front of the LED module 50 to inject light emitted from the LED element 52 to diffuse the light to the outside, the LED element 52 is Unlike the discharge lamp, since the angle of light diffusion is small, the convex diffusion cover 10 is mounted in front of the LED module 50, that is, in the direction of light emission, thereby expanding the angle at which light is radiated. Increasing the area can be achieved a more efficient lighting effect.

In addition, a transparent acrylic, polycarbonate, or glass may be used as the material of the diffusion cover 10 to improve light transmittance, but opaque acrylic and polycarbonate may be used to prevent glare. Or glass may be used.

The diffusion cover 10 may be used in a variety of colors of acrylic, polycarbonate or glass to exhibit a variety of lighting effects and the diffusion cover 10 is not limited to hemispherical, other shapes such as rectangular dome, polygonal dome or elliptical dome type Modifications are also possible.

The housing 20 is coupled to the diffusion cover 10 and the LED module 50 including a substrate on which the plurality of LED elements 52 are mounted to face the diffusion cover 10 is a screw or the like. Are combined.

 The housing 20 has an area of a fallopian tube made of a thermally conductive synthetic resin forming an inner space 80 through which the upper and lower portions of the housing 20 are wider and the upper and lower portions thereof pass through the upper portion, and the heat dissipation protrusion is not configured. The weight of the LED bulb may be reduced and the temperature of heat generated by the LED module 50 may be reduced.

The internal space 80 of the hollow part of the housing 20 is equipped with an inverter 70 configured with a driving circuit for driving the LED, and the diffusion cover 10 and the housing 20 are not limited to screwing. Can be fastened in one touch and can be coupled to each other by a fixing device in the form of a ring (60).

In the one-touch fastening method, the diffusion cover 10 and the housing 20 face each other, and then pressure is applied to each end of the diffusion cover 10 and the housing 20 to the diffusion cover 10 in the housing 20. Is fitted.

The housing 20 is composed of a plurality of screw coupling portion formed with a screw groove protruding at a predetermined interval toward the center on the inner wall or an inner flange protruding in the inner direction at a predetermined interval around the inner circumferential surface at regular intervals It is also possible to construct a plurality of screw grooves.

The LED module 50 is used as a light source of a lamp and is formed inside the diffusion cover 10 and the housing 20 and includes an LED substrate 52 on which an LED element 52 is mounted. 51).

The LED module 50 includes an LED substrate 51 on which an electrode circuit is formed so as to electrically connect the LED elements 52, and an electrode on the LED substrate 51. It is composed of a plurality of high-power LED (LED) substrate 51 elements attached to the circuit and electrically connected to each other, the LED substrate 51 is made of a resin-based material that is commonly used.

The inverter supplies a DC current to the LED (LED) module 50 and is electrically mounted by the electrode and the electrode wire 71 mounted inside the housing 20 and formed under the housing 20 in the housing 20. It is configured to be connected to, and is electrically connected to the LED (LED) module 50 and the wiring passing through the heat absorbing plate 40.

The socket 30 is fastened to the lower portion of the housing 20, the thread is formed along the outer diameter to be coupled to the lower end of the housing 20, the lower side is formed with an electrode to receive the driving power from the outside have.

The heat absorbing plate 40 is in close contact with the LED module 50 and is formed in the housing 20, has a predetermined thickness, and is made of a material such as aluminum to heat heat generated from the LED element 52. As absorbing, heat is exchanged with heat generated from the LED module 50 to absorb heat and accumulate in the body.

The heat absorbing plate 40 is in close contact with one surface of the LED substrate 51 and fastened to the housing 20, and is formed of a material having thermal conductivity such as aluminum, and a through hole is formed in the center thereof, and the heat absorbing plate 40 is formed at the edge thereof. The screw groove to which the screw to fasten the housing 20 is fastened is formed at a predetermined interval.

Since the heat absorbing plate 40 is formed inside the housing 20, the shape of the edge of the heat absorbing plate 40 and the shape of the inner edge of the housing 20 correspond to the edges of the heat absorbing plate 40 and the housing 20. The shape of the inner edge is the same and the thickness of the heat generated from the LED element 52, that is, the brightness of the LED, that is, the watts WATT may vary.

That is, the heat absorbing plate 40 may be elastically installed, so that two or three of the heat absorbing plates 40 may be stacked, and as the number of stacked sheets increases, the length of the screw used for fastening also increases.

The heat absorbing plate 40 may be configured such that the shape of the inner edge of the housing 20 is not the same. However, since the heat absorbing plate 40 does not absorb all of the heat of the LED substrate 51 from the heat absorbing plate 40, the efficiency is improved. It is preferable that the shape of the inner edge of the housing 20 be the same because it is lowered.

LED module is placed so that the heat absorbing plate 40 is placed on the upper surface of the screw coupling portion or the inner flange of the housing 20 and the LED substrate 51 is in contact with the upper surface of the heat absorbing plate 40. The heat absorbing plate 40 and the LED are placed in the housing 20 when the heat absorbing plate 40, the LED substrate 51, and the screw groove of the screw coupling part or the inner flange are aligned, and then fastened with screws. (LED) The substrate 51 is joined.

On the other hand, the inverter coupling piece 21, the lower inside of the housing 20 to which the socket 30 is coupled is configured and projected up and down on the inner peripheral surface, the inverter 70 is inserted into the inverter coupling piece 21 to the housing 20 is entered in the interior space (80).

That is, the inverter coupling piece 21 is composed of a pair facing each other from the left and right sides and composed of a coupling piece formed in front and rear in each pair, the front and rear coupling pieces are spaced at regular intervals, the spaced space is formed as an inverter insertion groove and this inverter insertion The inverter 70 is inserted into the groove.

In other words, while the inverter 70 is inserted into a pair of inverter insertion grooves formed by the inverter coupling piece 21 and fixed to the left and right, the upper surface of the inverter 70 and the lower surface of the heat absorbing plate 40 are coupled to each other. To be placed in the housing 20.

An end of the upper surface of the inverter 70 is integrally formed with the inverter 70 and protruding in the longitudinal direction of the inverter 70 and spaced apart at regular intervals.

Grooves formed at regular intervals are formed in the lower surface of the heat absorbing plate 40 at a portion corresponding to the protrusion of the inverter 70. The protrusions are inserted into the grooves so that the upper surface of the inverter 70 and the heat absorbing plate 40 are formed. The lower surface is fixedly coupled.

That is, the lower surface of the inverter 70 is inserted into the inverter insertion groove formed by the inverter coupling piece 21, the upper surface of the inverter 70 is inserted into the groove of the heat absorbing plate 40, the inverter 70 ) Is entered in the interior space 80 of the housing 20.

The housing 20 penetrates the inside and is formed to be wider toward the upper portion, so that the inside of the housing 20 has a space in which the inverter 70 can be inserted, that is, an internal space 80, and the inverter 70 is inserted therein. In the state, the lower portion of the lower portion is not formed by the inverter 70, and the upper portion is formed to have a wider interval between the inner width of the inverter 70 and the housing 20.

 In addition, the inverter 70 inserted into the housing 20 is a device for converting an alternating current into a direct current, and converts an alternating current input from the socket 30 through an electrode line 71 into a direct current so as to display an LED. ) To the module 50.

The air circulation hole 23 is composed of a pair penetrated before and after the upper portion of the inverter coupling piece 21 in the lower portion to which the socket 30 of the housing 20 is coupled, and is spaced apart at 180 ° intervals. You can also vary the number.

That is, the air circulation hole 23 is an internal large space according to the internal large space a and the internal small space b formed before and after the inverter 70 after the inverter 70 is placed in the housing 20. It may be configured with two or more in the lower portion of the housing 20 is formed (a).

When the inverter 70 is installed in the housing 20, the inverter 70 is eccentrically formed at the center of the heat absorbing plate 40, and the internal space 80 of the housing 20 is the inverter 70. ) Is divided into the front and rear of the inside of the inverter 70 is formed in the front of the inverter 70 is divided into an inner large space (a) that is configured larger than the inner space 80 formed on the rear, the rear of the inverter 70 The inverter 70 is eccentrically formed at the center of the heat absorbing plate 40, and the inverter 70 is spaced apart from the through hole formed at the center of the heat absorbing plate 40. It is easily entered.

Therefore, the through hole of the heat absorbing plate 40 is configured to communicate directly with the inner large space (a) of the housing 20 and indirectly communicate with the inner small space (b).

The heat generated from the LED element 52 of the LED module 50 is partially absorbed by the heat absorbing plate 40, and the rest is the cover inner space c formed by the diffusion cover 10. The air in the cover inner space (c) rises due to the heat generated by the LED element 52.

In addition, the heat absorbed by the heat absorbing plate 40 is the air in the inner space (a) by the heat absorbing plate 40 in contact with the inner space (a) and the inner small space (b) of the housing 20 and The heat exchanged with the air in the internal small space (b), that is, the air in the internal large space (a) and the internal small space (b) absorbs the heat of the heat absorbing plate 40 and thus the air and the internal small space in the internal large space (a). The air in (b) also rises in temperature.

On the other hand, the air whose temperature is raised in the cover inner space (c) is introduced into the inner large space (a) through the through hole formed in the center of the heat absorbing plate 40 and thereby the air in the inner large space (a) The temperature rises higher than the air in the internal small space b.

The air in the inner large space (a) raised as described above is raised (it is lowered because the attached drawing is shown opposite to the shape in which the LED bulb is coupled), so that the air circulation hole 23 configured in the housing 20 It flows out of the housing 20 through the air circulation hole 23 formed in the auxiliary space (a).

Then, when the air in the inner large space (a) is directed to the air circulation hole 23, when the air near the heat absorbing plate 40 flows out along the air circulation hole 23, the empty seat of the inner large space (a) Air in the internal small space (b) is introduced into.

In other words, the housing 20 is configured in the shape of a fallopian tube so that the inside of the lower portion of the housing 20 is not largely spaced from the inverter 70, and the inside of the housing 20 is closer to the upper portion of the housing 20. The gap is made larger than the lower part.

Air existing in the inner small space b is introduced into the inner large space a by passing between the inverter 70 and the inner surface of the housing 20 formed at an upper portion of the housing 20.

Meanwhile. The outside air flows into the inside of the housing 20 through another air circulation hole 23, that is, the air circulation hole 23 formed in the inside small space b of the housing 20, It is lowered upwards (the attached figure is raised as it is shown opposite to the shape in which the LED bulb is coupled), and the external air flows into the housing 20 because the temperature is lower than the internal air of the LED bulb. If it is lowered by the temperature difference.

Therefore, the air in the housing 20 is circulated, that is, the external air flows through the air circulation hole 23 formed in the internal small space b of the housing 20 and descends to the vicinity of the heat absorbing plate 40. Heat exchange with the heat absorbing plate 40, the air formed in the cover inner space (c) is also raised to enter the inner large space (a) through the through hole of the heat absorbing plate 40, the inner large space (a) Air is heat-exchanged with the heat absorbing plate 40 and the temperature is further increased by the air of the housing 20 introduced into the inner large space (a), so that the air is faster than the air in the relatively small internal space (b). As it rises, it flows out through the air circulation hole 23 in the inner large space a of the housing 20.

As the air circulation hole 23 is formed in the housing 20, external air enters into the housing 20 through one air circulation hole 23, and the housing (through the other air circulation hole 23). 20) the internal air is discharged to the outside to circulate the internal air of the housing (20).

 That is, the heat absorbing plate 40 is configured to absorb heat by heat exchange with heat generated from the LED module 50 to accumulate in the body, but the air inside the housing 20 and the outside air by the air circulation hole 23. By circulating is cooled by the air in the housing 20 to radiate heat.

According to the present invention, as the air circulation passage is formed inside the housing 20 by the housing 20 and the inverter 70, the outside air passes through the inside small space b and flows out into the inside large space a. Convection cools the heat absorbing plate 40 and the inverter 70.

Table 1 below is an experimental result of the 5W LED bulb using the 'synthetic resin housing' and 'aluminum heat absorbing plate' according to the present invention.

Heat absorbing plate thickness (mm)
Air circulation
The presence or absence Plastic housing
External average temperature (℃) Plastic housing
Internal average temperature (℃) Heat absorbing plate
Average temperature (℃) 4.0
none 55.8 67.5 72.7 has exist 49.6 55.1 59.5

The test result is that the brightness of 5W LED bulbs for home use corresponds to the brightness of 60W of incandescent lamps, using a synthetic resin housing 20 for a 5W LED bulb and using a heat absorbing plate 40 with a thickness of 4.0 mm. It is the result of measuring the internal and internal average temperature of the housing | casing 20, and the temperature of the heat absorbing plate 40 in the state which lighted for 48 hours.

Generally, since the allowable use temperature of the LED element 52 is within 85 ° C., the LED element 52 may be sufficiently used when the ambient temperature in which the LED element 52 is used is within 85 ° C.

In the present invention, the LED bulb without the air circulation hole 23 is formed, the average temperature inside the synthetic resin housing 20 in the continuous lighting state for 48 hours As the LED element 52 does not have a problem in load with temperature at 67.5 ° C., and even when the air circulation hole 23 is formed, the average temperature inside the resin housing 20 is 55.1 ° C. The element 52 will not carry a load on the temperature.

Therefore, the LED bulb in which the air circulation hole 23 of the present invention is not formed has the internal temperature of the housing 20 by absorbing heat generated by the LED element 52 from the heat absorbing plate 40. Is maintained at a lower temperature than the allowable use temperature of 85 ℃ not only can maintain the stability of the LED (LED) 52, but also the LED (LED) bulb in which the air circulation hole 23 is formed is an internal space (80) ) And the air in the cover inner space (c) is circulated by natural convection, so that the internal temperature of the housing 20 is lower than the internal temperature of the housing 20 in which the air circulation hole 23 is not configured. The element 52 can be kept more stable.

Therefore, the present invention consists of a housing 20 having no heat dissipation protrusion and an upper surface, so that the structure of the housing 20 is simple, and an air circulation hole 23 is formed in the upper portion of the housing 20 to form the inside of the housing 20. Air and external air are circulated to lower the temperature of the heat absorbing plate 40 and the inside of the housing 20, and the heat absorbing plate 40 can be expanded, thereby lowering the production cost and absorbing the air inside the housing 20. There is an effect of cooling the plate 40.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by those equivalent to the claims.

10: diffusion cover 20: housing
21: inverter coupling piece 23: air circulation hole 30: socket 40: heat absorbing plate
50: LED module 51: LED substrate
52: LED device 60: ring
70: inverter 71: electrode wire
80: inside space a: inside space
b: Inner space c: Inner space of cover

Claims (4)

LED module and LED module including a hemispherical diffusion cover, a housing coupled to the diffusion cover and formed of a thermal conductor, a diffusion cover and a substrate formed therein and mounted with an LED element. In the LED bulb consisting of an inverter for supplying a DC current, a socket coupled to the housing,
A heat absorbing plate formed of an aluminum material in close contact with the LED module and formed to a predetermined thickness;
LED bulb, characterized in that the heat absorbing plate absorbs the heat generated from the LED (LED) element.
The method of claim 1,
The housing is an LED bulb, characterized in that consisting of a synthetic resin forming an inner space through which the upper and lower portions of the heat dissipation protrusion and the upper surface is not passed.
The method of claim 2,
A lower inner part of the housing to which the socket is coupled is configured up and down on the inner circumferential surface and protrudes an inverter coupling piece;
LED bulb, characterized in that the inverter is inserted in the inverter coupling piece and entered in the housing interior space.
The method of claim 3,
A pair of air circulation holes penetrated before and after the upper portion of the inverter coupling piece at the lower portion to which the socket of the housing is coupled;
LED bulb, characterized in that the outside air enters into the housing through the one air circulation hole, the air inside the housing is discharged to the outside through the other air circulation hole is circulated inside the housing.

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