CN213452929U

CN213452929U - Lighting device and lamp

Info

Publication number: CN213452929U
Application number: CN202022674956.3U
Authority: CN
Inventors: 杨毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-06-15
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a lighting device and a lamp, which comprises a reflecting cup and a light-emitting device, wherein the reflecting cup comprises a light outlet surrounded by a concave surface and a concave surface, the light-emitting device emits light to the concave surface, and the concave surface reflects the light and emits reflected light from the light outlet; the light-emitting device is characterized by further comprising a heat-conducting column, wherein the heat-conducting column is arranged on a light path of reflected light, and the light-emitting device is fixed on the heat-conducting column. The light-emitting device and the reflecting cup are perfectly combined, and the heat dissipation problem of the light-emitting device is solved.

Description

Lighting device and lamp

Technical Field

The utility model relates to the field of lighting technology, specifically speaking relates to a lighting device and lamps and lanterns.

Background

Most of the existing lighting devices are used with a reflective cup/lamp shade to emit light emitted from the light emitting device toward a certain angle or direction. The LED light source has the advantages of small volume, light weight, solid state, long service life, special wavelength, lower driving voltage, high light efficiency, low energy consumption, safety, reliability, durability and difficult color decay, and is widely applied in the field of illumination. When the LED light source is combined with the reflective cup/lamp cover, the LED light source is generally fixed at an end opposite to the light outlet of the reflective cup/lamp cover, and then the light emitted from the LED light source is reflected by the reflective cup/lamp cover.

The combination of the reflecting cup and the LED light source generally fixes the LED light source at the bottom of the reflecting cup, the LED light source emits light to the inner wall of the reflecting cup, and the reflecting cup reflects the light emitted by the LED light source and then emits the light from the light outlet. The LED light source cannot be arranged at the focus of the reflecting cup in the mode, and if the LED light source is arranged at the focus of the reflecting cup, a single extension device is needed to extend the LED light source to the focus of the reflecting cup. After the LED light source is extended to the focus of the reflecting cup, a heat dissipation device is required to be added to the LED light source. The reflection cup cannot be used in combination with a laser light source using a reflection type fluorescent sheet, and particularly cannot solve the problem of heat dissipation of the fluorescent sheet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the weak point of above-mentioned conventional art, the utility model provides a carry out radiating structure for light source or fluorescent screen on the anti-light cup.

In order to solve the above problems, the utility model adopts the following technical scheme: a lighting device comprises a reflecting cup and a light-emitting device, wherein the reflecting cup comprises a concave surface and a light outlet defined by the concave surface, the light-emitting device emits light to the concave surface, and the concave surface reflects the light and emits the reflected light from the light outlet; the light-emitting device is characterized by further comprising a heat-conducting column, wherein the heat-conducting column is arranged on a light path of reflected light, and the light-emitting device is fixed on the heat-conducting column.

As an improvement of the technical scheme: the heat conducting column comprises a heat pipe.

As an improvement of the technical scheme: the section of the heat pipe is strip-shaped, and one side of the strip-shaped short side faces to the reflected light.

As an improvement of the technical scheme: one end of the heat pipe is bent, the bent heat pipe is L-shaped, and the bent end of the heat pipe is positioned outside the reflecting cup and extends towards the bottom of the reflecting cup.

As an improvement of the technical scheme: the two ends of the heat pipe are bent towards the same direction, the bent heat pipe is U-shaped, the two bent ends of the heat pipe are positioned outside the reflecting cup, and the two bent ends of the heat pipe extend towards the bottom of the reflecting cup.

As an improvement of the technical scheme: the concave surface is an ellipsoid, and the light-emitting device is positioned on one focus of the ellipsoid; or the concave surface is a paraboloid, and the light-emitting device is positioned on one focus of the paraboloid.

As an improvement of the technical scheme: the light-emitting device is a fluorescent sheet and further comprises a laser light source which is matched with the fluorescent sheet, laser emitted by the laser light source is incident on the fluorescent sheet, and the fluorescent sheet is excited to generate excited light.

As an improvement of the technical scheme: the fluorescent piece is reflective fluorescent piece, laser setting is in the one side of keeping away from the light-emitting window, is provided with the light trap on the reflection of light cup, and the light that laser light source sent excites reflective fluorescent piece after passing the light trap, and the reflective fluorescent piece that is aroused sends to the concave surface and receives the laser.

As an improvement of the technical scheme: the LED light-emitting device is characterized in that the light-emitting device is an LED light-emitting chip, a fluorescent sheet is arranged on the light-emitting surface of the LED light-emitting chip, the LED light-emitting device further comprises a laser light source, a light-transmitting hole is formed in the light-reflecting cup, and light emitted by the laser light source passes through the light-transmitting hole and then excites the fluorescent sheet.

Owing to adopted above-mentioned technical scheme, compare with prior art, the utility model discloses with illuminator and the perfect combination of anti-light cup to illuminator's heat dissipation problem has been solved.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a cross-sectional view of a lighting device.

Fig. 2 is a top view of a lighting device.

Fig. 3 is a perspective view of a heat conduction column.

Fig. 4 is a cross-sectional view of a lighting device.

Fig. 5 is a cross-sectional view of a reflector cup.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a front view of a lighting device.

Fig. 8 is a cross-sectional view of a lighting device.

Fig. 9 is a perspective view of a heat conduction column.

Detailed Description

Example 1:

as shown in fig. 1-3, an illumination device comprises a reflective cup 101 and a light-emitting device, wherein the reflective cup 101 comprises a concave surface 102 and a light outlet defined by the concave surface 102, the light-emitting device emits light to the concave surface 102, and the concave surface 102 reflects the light and emits the reflected light from the light outlet; the light-emitting device is characterized by further comprising a heat-conducting column, wherein the heat-conducting column is arranged on a light path of reflected light, and the light-emitting device is fixed on the heat-conducting column. The light-reflecting cup 101 includes a concave surface 102 for reflecting light emitted from the light-emitting device, and the periphery of the concave surface 102 forms a light outlet from which the light reflected by the concave surface 102 exits and forms reflected light. The light emitting device generates a large amount of heat when emitting light to the concave surface 102, and in order to conduct the heat generated by the light emitting device to the outside of the whole system, the light emitting device is fixed on the heat conducting column which is arranged on the light path of the reflected light. Therefore, the light emitted by the light-emitting device is emitted to the concave surface 102, and the light emitted by the light-emitting device is ensured to enter the light-reflecting cup 101. And the heat conduction post can also conduct the heat generated by the light emitting device, so that the normal use of the light emitting device is prevented from being influenced by overhigh temperature.

The fixing and heat dissipation of the light-emitting device completely depend on the heat-conducting column, so the heat-conducting column can transfer heat and the fixing ability of the light-emitting device determines the using effect of the whole lighting device. In a preferred embodiment, the heat conducting column comprises a heat pipe 103. The heat pipe 103 is a high-efficiency heat conduction device manufactured by utilizing a liquid low-pressure phase change heat transfer principle, the heat conductivity coefficient of the heat pipe 103 is dozens of times to hundreds of times of that of the traditional metal, is far higher than that of various metals, is called as a thermal superconductor, and can quickly take heat away from a heat source. For example, in this embodiment, the heat pipe 103 is formed by sintering copper powder on the inner wall surface of the thin copper pipe as a substrate to form a sintered powder pipe core integrated with the pipe wall, the sintered powder can form a capillary structure to form internal liquid circulation, and after filling a liquid working medium, the inside is vacuumized to form a vacuum closed environment.

As can be seen from the above analysis of the heat pipe 103, the heat pipe 103 in this embodiment is made of a thin copper tube as a substrate, so that the heat pipe 103 can be bent or have a cross-sectional shape changed as required. In a preferred embodiment, the heat pipe 103 has a long section, and the short side of the long section faces the reflected light. Since the heat pipe 103 is disposed on the light path of the reflected light, the heat pipe 103 is easy to block the light, and in order to reduce the blocking of the heat pipe 103 to the reflected light, the heat pipe 103 is flattened, the flattened heat pipe 103 is a strip, and according to the heat pipe 103 shown in fig. 3 as an example, the cross section of the heat pipe 103 is a rectangle, the rectangle includes a pair of long sides and a pair of short sides, wherein one side of the short sides faces the reflected light, and at this time, the heat pipe 103 blocks the light the least, thereby ensuring that more emergent light is emitted from the light.

The heat pipe 103 can fix and radiate the light emitting device, and it is also necessary that the heat pipe 103 be disposed on the optical path of the reflected light, and the fixing of the heat pipe 103 becomes particularly important. In a preferred embodiment, one end of the heat pipe 103 is bent, the bent heat pipe 103 is L-shaped, and the bent end of the heat pipe 103 is located outside the reflective cup 101 and extends toward the bottom of the reflective cup 101. The heat pipe 103 is bent into an L-shape, the inner side of the bending part of the L-shaped heat pipe 103 is fixed at the light outlet of the reflective cup 101, and the bent end is attached to the outer side of the reflective cup 101 and extends towards the bottom of the reflective cup 101, so that the contact area between the heat pipe 103 and the reflective cup 101 is increased, the fixation is firmer, and the heat generated by the light-emitting device is conducted to the bottom of the reflective cup 101 through the heat pipe 103.

The light emitting device is required to emit light required for illumination, and in a preferred embodiment, the light emitting device is an LED light emitting chip 105, and the LED light emitting chip 105 is easily available and low in price, and is suitable for mass production by using the light emitted from the LED light emitting chip 105. Since the LED chip needs to be fixed on the short side of the heat pipe 103, the fixation is not firm, and in a preferred embodiment, a circular table 104 is fixed on the heat pipe 103, and the LED chip is fixed on the circular table 104, so that the fixation of the LED chip is firmer.

The light-reflecting cup 101 is widely used in the illumination field, light emitted by the light-emitting device emitting light in lambertian shape is irradiated onto a curved surface formed by the concave surface 102 of the light-reflecting cup 101, and the light emitted by the light-emitting device emitting light in lambertian shape is reshaped by the concave surface 102 and then emitted from the light-emitting port. From the above analysis, the curvature or shape of the concave surface 102 affects the light emitting angle of the emitted light, and several regular concave surfaces 102 are generally adopted in the illumination field according to multiple experimental comparisons of the applicant, and in a preferred embodiment, the concave surface 102 is an ellipsoid, and the light emitting device is located at a focus of the ellipsoid. According to geometric knowledge, an ellipsoid has two focal points, and one beam emitted from one focal point of the ellipsoid is reflected by the spherical surface of the ellipsoid and then is bound to return to the other focal point of the ellipsoid. When the concave surface 102 is an ellipsoid, the light emitting device is located at the first focal point 111 of the ellipsoid and emits light toward the concave surface 102, and the light emitted by the light emitting device is reflected by the concave surface 102 and then focused on the second focal point 112 of the ellipsoid where the concave surface 102 is located.

As shown in fig. 1, the light emitting device emits a first light 121, a second light 122, a third light 123, a fourth light 124, a fifth light 125, and a sixth light 126 from the first focal point 111, and the first light 121 to the sixth light 126 reach the concave surface 102, are reflected by the concave surface 102, and then return to the second focal point 112.

Example 2:

the light-emitting device given in example 1 is an LED light-emitting chip, which is inexpensive, easy to obtain, and mass-produced, but the light-emitting intensity of the LED light-emitting chip is insufficient, and it is difficult to satisfy the use requirements in high-power lighting and long-distance lighting. Therefore, this embodiment mode differs from embodiment 1 in that a laser beam is introduced. The introduction of laser illumination solves the problems of high power and long distance illumination, but brings new problems, because laser is needed in laser illumination to excite a fluorescent sheet to generate white light for illumination. Because the heat generated by laser light emission is far greater than that generated by the LED light-emitting chip, the heat dissipation system of the original LED light-emitting chip cannot meet the heat dissipation of the fluorescent sheet.

As shown in fig. 4 to 6, in a preferred embodiment, the light emitting device is a fluorescent sheet 209, and further includes a laser light source 208 disposed in cooperation with the fluorescent sheet 209, and the laser light 227 emitted from the laser light source 208 is incident on the fluorescent sheet 209 and excites the fluorescent sheet 209 to generate a received laser light. After the light emitting device is replaced with the fluorescent sheet 209, the laser light source 208 is required to excite the fluorescent sheet 209 to emit the excited light. The fluorescent sheet 209 is a reflective fluorescent sheet 209, the laser light source 208 is arranged on one side far away from the light outlet, the light-transmitting hole 206 is arranged on the reflective cup 201, the laser 227 emitted by the laser light source 208 passes through the light-transmitting hole 206 to excite the reflective fluorescent sheet 209, and the excited reflective fluorescent sheet 209 emits excited laser light to the concave surface 202. At this time, after the laser light source 208 emits the laser light 227, the laser light 227 passes through the lens 207, receives the light, passes through the light transmission hole 206, enters the light reflecting cup 201, and then excites the fluorescent sheet 209, and the optical path diagrams of the received laser light and the laser light which does not excite the fluorescent sheet 209, which are generated after the laser light 227 excites the fluorescent sheet 209, are the same as the optical path diagram of the light emitted by the light emitting device in embodiment 1, and are omitted in this embodiment.

In order to promote the heat dissipation of the fluorescent sheet, the light outlet of the reflective cup 201 surrounds the heat conducting strip 210, the inner diameter of the opening of the heat conducting strip 210 is inwardly contracted along the light outlet direction, the heat conducting strip 210 is provided with a heat conducting groove, and the heat pipe 203 is placed in the heat conducting groove. In order to increase the contact area of the heat pipe with the heat conducting bar 210, the difference from embodiment 1 is that one end of the heat pipe 203 fixing the light emitting device extends to the edge of the light outlet. At this time, the contact area between the heat pipe 203 and the heat conducting strip 210 is further increased, and the fixing is firmer and the heat conducting effect is better.

Example 3:

as shown in fig. 7-9, the concave surface in the above embodiments is an ellipsoid, the light-emitting device is located at one focal point of the ellipsoid, and the light emitted from the light outlet forms a focal point at another focal point of the ellipsoid and then emits the divergent light. In the conventional illumination, parallel light is an indispensable illumination light flux. The difference between this embodiment and embodiment 1 is that the concave surface 302 is a paraboloid, and the light emitting device is located at the focus of the paraboloid. The light emitting device is an LED light emitting chip 305, a fluorescent sheet 309 is arranged on the light emitting surface of the LED light emitting chip 305, the light emitting device further comprises a laser light source 308, a light hole 306 is formed in the reflection cup 301, and laser 327 emitted by the laser light source 308 passes through the light hole 306 and then excites the fluorescent sheet 309.

The LED light emitting chip 305 may share the same fluorescent sheet 309 with the tube laser light source 308, or may have a fluorescent sheet 309 by itself, in which case the fluorescent sheet 309 is a transmissive fluorescent sheet 309. The laser light 327 emitted from the laser light source 308 excites the fluorescent sheet 309 to emit a received laser light, which is reflected by the LED light emitting chip 305 and then emitted from the fluorescent sheet 309.

As shown in fig. 8, the fluorescent sheet 309 comprises a first light 321, a second light 322, a third light 323, a fourth light 324, a fifth light 325, and a sixth light 326 emitted from a focal point of an ellipsoid composed of the concave surface 302, and the first light 321 to the sixth light 326 reach the concave surface 302 and are reflected by the concave surface 302 to exit in parallel.

As shown in fig. 9, two ends of the heat pipe 303 are bent in the same direction, the bent heat pipe 303 is U-shaped, and the two bent ends of the heat pipe 303 are located outside the reflective cup 301 and extend in the bottom direction of the reflective cup 301. At this time, two ends of the heat pipe 303 are both located on the reflective cup 301, so that the contact area between the heat pipe 303 and the reflective cup 301 is increased and more stable.

The present invention is not limited to the embodiments described above, but the embodiments are only preferred embodiments of the present invention and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. An illumination device, characterized by: the LED lamp comprises a reflecting cup and a light-emitting device, wherein the reflecting cup comprises a concave surface and a light outlet defined by the concave surface, the light-emitting device emits light to the concave surface, and the concave surface reflects the light and emits reflected light from the light outlet; the light-emitting device is characterized by further comprising a heat-conducting column, wherein the heat-conducting column is arranged on a light path of reflected light, and the light-emitting device is fixed on the heat-conducting column.

2. A lighting device as recited in claim 1, wherein: the heat conducting column comprises a heat pipe.

3. A lighting device as recited in claim 2, wherein: the section of the heat pipe is strip-shaped, and one side of the strip-shaped short side faces to the reflected light.

4. A lighting device as recited in claim 2, wherein: one end of the heat pipe is bent, the bent heat pipe is L-shaped, and the bent end of the heat pipe is positioned outside the reflecting cup and extends towards the bottom of the reflecting cup.

5. A lighting device as recited in claim 2, wherein: the two ends of the heat pipe are bent towards the same direction, the bent heat pipe is U-shaped, the two bent ends of the heat pipe are positioned outside the reflecting cup, and the two bent ends of the heat pipe extend towards the bottom of the reflecting cup.

6. A lighting device as recited in claim 1, wherein: the concave surface is an ellipsoid, and the light-emitting device is positioned on one focus of the ellipsoid; or the concave surface is a paraboloid, and the light-emitting device is positioned on one focus of the paraboloid.

7. A lighting device as recited in claim 1, wherein: the light-emitting device is a fluorescent sheet and further comprises a laser light source which is matched with the fluorescent sheet, laser emitted by the laser light source is incident on the fluorescent sheet, and the fluorescent sheet is excited to generate excited light.

8. A lighting device as recited in claim 7, wherein: the fluorescent piece is reflection type fluorescent piece, laser light source sets up in the one side of keeping away from the light-emitting window, is provided with the light trap on the reflection of light cup, and the light that laser light source sent arouses reflection type fluorescent piece after passing the light trap, and the reflection type fluorescent piece that is aroused sends to the concave surface and receives the laser.

9. A lighting device as recited in claim 1, wherein: the LED light-emitting device is characterized in that the light-emitting device is an LED light-emitting chip, a fluorescent sheet is arranged on the light-emitting surface of the LED light-emitting chip, the LED light-emitting device further comprises a laser light source, a light-transmitting hole is formed in the light-reflecting cup, and light emitted by the laser light source passes through the light-transmitting hole and then excites the fluorescent sheet.

10. A light fixture, characterized by: comprising a lighting device according to any one of claims 1-9.