CN210601304U

CN210601304U - Reflective LED lamp based on diffuse reflection nano spinning

Info

Publication number: CN210601304U
Application number: CN201921261250.5U
Authority: CN
Inventors: 于佳栋; 汤勇; 李宗涛; 余树东; 杜学威; 赵启良; 余彬海
Original assignee: South China University of Technology SCUT; Zhuhai Institute of Modern Industrial Innovation of South China University of Technology
Current assignee: South China University of Technology SCUT; Zhuhai Institute of Modern Industrial Innovation of South China University of Technology
Priority date: 2019-05-06
Filing date: 2019-08-05
Publication date: 2020-05-22
Anticipated expiration: 2029-08-05

Abstract

The utility model discloses a reflective LED lamp based on diffuse reflection nanometer spinning, which comprises a heat pipe radiator, a lamp shell, a nanometer spinning reflecting surface with diffuse reflection effect, an LED light source, an LED substrate and a light-emitting mask with a micropore soft light structure; the LED lamp comprises a lamp shell, and is characterized in that a reflecting surface with a diffuse reflection effect is attached to the inner wall surface of the lamp shell, a heat pipe radiator is installed on the outer wall surface of the lamp shell, an opening is formed in the bottom of the lamp shell, a light emitting mask is installed at the opening, an LED light source and an LED substrate are installed on the inner wall surface of a flange of the opening of the lamp shell, the LED substrate is of a curved surface structure on the side surface of a circular truncated cone, and the LED light sources. According to the utility model discloses a LED lamp, the light that the LED light source sent jets out from the light-emitting face guard after the plane of reflection diffuse reflection, has advantages such as efficient, light source irradiation is even, the visual light source is soft comfortable, has solved the glare problem that the indoor lighting brought of hi-lite LED pointolite well.

Description

Reflective LED lamp based on diffuse reflection nano spinning

Technical Field

The utility model relates to a machine-building and optical components make the field, concretely relates to a reflective LED lamps and lanterns based on diffuse reflection nanometer spinning for the illumination.

Background

As a new generation solid-state light source, the LED lamp has been widely applied in various illumination fields due to the advantages of energy conservation, environmental protection, long service life, vibration resistance and the like. With the improvement of related technology and the improvement of LED lighting effect, the LED lamp is gradually replacing various traditional light sources, and the market share of the LED lamp in the general lighting field can reach 50% in 2020. However, since the LED light source is a point light source, the light-emitting surface is small, and the directivity is strong, the LED lamp has the disadvantages of uneven light emission and a certain dark angle, which causes the problems that the brightness of the lamp in an indoor lighting scene is greatly changed between bright and dark, and the direct light is easy to cause dazzling.

In order to avoid glare, the direct-emitting lighting lamp shields the light source, but simultaneously enlarges a dark angle and limits the light emitting angle of the lamp, and the common reflection type lamp using the light guide plate solves the glare problem and has the defects that the light efficiency of the light source is lower and the equal-brightness surface does not have cut-off light distribution.

In addition, the photoelectric conversion efficiency of most LED devices is 40% -70%, partial electric energy and light energy are converted into heat, the heat accumulated in the LED lamp can heat the LED chip, cracks or fractures occur between different layers of the chip, and then the phenomenon of light attenuation failure occurs. Therefore, heat dissipation issues are also an important aspect of LED fixture design considerations.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art exist the light-emitting inhomogeneous, exist certain vignetting, radiating treatment not good shortcoming and not enough that leads to the light decay easily, the utility model provides a reflective LED lamps and lanterns based on diffuse reflection nanometer spinning.

In order to solve the technical problem, the utility model discloses adopt one of following technical scheme at least.

A reflective LED lamp with diffuse reflection nano-spinning comprises a heat pipe radiator, a lamp shell, a reflecting surface with the diffuse reflection nano-spinning, an LED light source, an LED substrate and a light emitting mask; the LED lamp comprises a lamp shell and is characterized in that a hanging ring is arranged at the top of the lamp shell, a heat pipe radiator is arranged on the outer wall surface of the lamp shell, a reflecting surface with a diffuse reflection microstructure is attached to the inner wall surface of the lamp shell, an LED light source and an LED substrate of an annular array are arranged on the inner wall surface of an opening flange of the lamp shell, the LED substrate is of a curved surface structure of a circular truncated cone side surface, so that light emitted by the LED light source and a horizontal surface are in an oblique angle and are emitted out from a light emitting mask after the diffuse reflection of the reflecting surface, the opening of the lamp shell is installed and covered with the light emitting mask, a lamp circuit is installed on the outer side surface of the LED substrate.

Further, the nano-spinning reflecting surface with the diffuse reflection effect is formed by pressing a polyacrylonitrile Plastic (PAN) spinning film and a polyethylene terephthalate Plastic (PET) film. The reflectivity of the polyacrylonitrile plastic spinning film obtained by electrostatic spinning in a 380-800 nm waveband is 80-98%, the diffuse scattering rate is 80-88%, and the diameter of the electrostatic spinning fiber is 80-200 nm.

Furthermore, the arc-shaped heat pipe is arranged on the outer surface of the upper hemisphere of the lamp shell in a warp distribution mode.

Furthermore, the lamp shell is in a spherical shell shape and made of copper or aluminum.

Further, the LED devices are arranged in an annular array, the number of the LED devices is more than or equal to six, the LED substrate is a curved surface of the side face of the circular truncated cone, and the LED devices are arranged on the inner side face of the curved surface.

Further, the illumination elevation angle of the LED devices should be set to 23 +/-1 degrees to obtain the optimal brightness uniformity of 73% -81.8% (in a certain positive correlation with the number of the LED devices), and the system efficiency is 60%.

Furthermore, the light-emitting mask is provided with a rough surface and a micropore structure with a diffusion effect, so that a soft light effect is further generated. When the micropore structure is prepared by combining a PMMA-PS phase separation method with a material ratio of 1:4-4:1 and chemical etching, the color temperature uniformity deviation is 11-15%.

Furthermore, heat-conducting silica gel is coated between the heat pipe radiator and the lamp shell and between the LED substrate and the lamp shell.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:

(1) the utility model discloses a reflective LED lamps and lanterns based on diffuse reflection nanometer spinning, through lay the nanometer spinning plane of reflection that has the diffuse reflection effect at the lamp body inner wall, make the reflection illuminant take place to jet out from the light-emitting face guard after the raman scattering, and then the light-emitting is soft, the LED light source that the directionality is stronger is evenly distributed the light-emitting, have lamps and lanterns efficient, the light source irradiation is even, the soft comfortable advantage such as of the soft comfortable of visual light source, solved the LED lamps and lanterns that high brightness LED pointolite brought for indoor lighting well and dazzled, the inhomogeneous problem of light intensity;

(2) the reflective LED lamp based on diffuse reflection nano spinning of the utility model has the advantages that the arc heat pipes are arranged on the outer surface of the lamp shell in a longitudinal manner, so that heat generated by the light source can be rapidly transferred to the lamp shell and further uniformly dissipated to the environment, the heat conduction and dissipation capacity is enhanced by the heat conduction glue between the metal material of the lamp shell and the light source-LED substrate-lamp shell, and the problem of light attenuation caused by heating of the LED lamp is avoided;

(3) the utility model discloses a reflective LED lamps and lanterns based on diffuse reflection nanometer spinning have good reflection effect, have optimized the angle luminance homogeneity of whole light source. The utility model discloses a reflective LED lamps and lanterns based on diffuse reflection nanometer spinning have advantages such as the performance is excellent, preparation method is simple quick, are applicable to industry large-scale production.

Drawings

FIG. 1 is a schematic view of the appearance and structure of a reflective LED lamp based on diffuse reflection nano-spinning;

FIG. 2 is a schematic diagram of an apparatus for preparing a polyacrylonitrile Plastic (PAN) spinning membrane by electrostatic spinning;

FIG. 3 is a schematic view of an assembly of an LED device and an LED substrate shaped as a truncated cone side;

FIG. 4 shows the micro-scale holes formed by the surface phase separation method of the light-emitting mask in example 1 in combination with chemical etching.

In the figure: the LED lamp comprises a hanging ring 1, a heat pipe radiator 2, a lamp shell 3, a reflecting surface 4 with a diffuse reflection effect, an LED light source 5-1, an LED substrate 5-2 and a light-emitting mask 6.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Example 1

A reflective LED lamp based on diffuse reflection nano spinning is disclosed, as shown in figure 1, and comprises a heat pipe radiator 2, a lamp shell 3, a nano spinning reflecting surface 4 with diffuse reflection effect, a 3535 hemispherical lens packaging white light device and LED substrate 5, and a light emergent face mask 6; the lamp shell top be equipped with rings 1, lamp shell outer wall surface installs heat pipe radiator 2, the laminating of lamp shell internal face has nanometer electrostatic spinning membrane plane of reflection 4 that has the diffuse reflection effect, 3535 hemisphere lens encapsulation white light device and the LED base plate 5 of annular array are installed to lamp shell opening flange internal face, and the LED base plate is the curved surface configuration of round platform side for the light that the LED light source sent is personally submitted the oblique angle with the level and is followed the light-emitting face guard and jet out after the plane diffuse reflection, lamp shell opening flange outer wall surface bonds and installs light-emitting face guard 6, lamp circuit installs at LED base plate lateral surface, and the power cord is buried between nanometer spinning plane of reflection and the shell that has the diffuse reflection effect, is drawn forth by near lamp top opening.

The nano spinning reflecting surface 4 with the diffuse reflection effect is formed by bonding a polyacrylonitrile Plastic (PAN) spinning film on a polyethylene terephthalate (PET) film and pressing the bonded films in a mould pressing mode.

The light emergent mask material is polymethyl methacrylate (PMMA) and is provided with micron-sized micropores prepared by combining a frosted rough surface with a phase separation method and chemical etching, so that the light emergent further generates a soft light effect.

And heat-conducting silica gel is coated between the heat pipe radiator and the lamp shell and between the LED substrate and the lamp shell.

As shown in fig. 3, the LED devices are 3535 hemispherical lens packaged white light devices, which are arranged in an annular array, the number of the LED devices is nine, the LED substrate is configured as a curved surface of a circular truncated cone side, and the LED devices are mounted on the inner side surface of the curved surface.

The arc-shaped heat pipe radiators are arranged on the outer surface of the upper hemisphere of the lamp shell in a longitudinal arrangement mode. The number of the arc-shaped heat pipes is four, and the arc-shaped heat pipes are arranged on the outer surface of the upper hemisphere of the spherical shell at intervals of 90 degrees in an equidistant mode. The arc heat pipe is bonded on the lamp shell by heat-conducting silica gel.

The LED light source illumination elevation angle is set to 23 degrees to obtain the optimal brightness uniformity of 81.8 percent.

The lamp shell is in a spherical shell shape.

Example 2

The manufacturing steps of the reflective LED lamp with diffuse reflection nano spinning are as follows:

two aluminum plates with the thickness of 2 mm are respectively stamped into a half spherical shell with an opening at the bottom after being spliced, the diameter of the outer spherical surface of the spherical shell is 200 mm, and a hole is drilled at the top of the spherical shell;

welding an LED device on an LED substrate, and fixing a circuit board on the back of the substrate by using heat-conducting silica gel; the LED substrate is integrally fixed at the lower part of one half of the spherical shell by using heat-conducting silica gel, and the power wire is bonded on the inner surface of the spherical shell by using the heat-conducting silica gel and is LED out from the top of the spherical shell.

PAN (80000 g/mol) with a mass fraction of 15% was dissolved in N, N-Dimethylformamide (DMF) to prepare a solution by magnetic stirring for 6 hours, and the solution was left to stand for 12 hours to remove bubbles. The solution was injected into a syringe connected to a syringe pump, an aluminum foil was placed as a substrate to which electrostatic spinning was attached, and a nozzle was provided at a height of 14 cm from the aluminum foil, as shown in fig. 2. A 15 kV high-voltage power supply 501 is connected between a nozzle of an injection pump 505 and an aluminum foil 502, the solution, namely PAN jet flow 504 is extruded from the nozzle at the injection speed of 0.4 ml/h, the solution is attached to the aluminum foil to form filaments, PAN filaments 503 are transferred to a PET film with an adhesive, and the PET film is pressed to form the nano-spinning reflecting surface 4 with the diffuse reflection effect. And (3) bonding the nano electrostatic spinning film with the diffuse reflection effect on the inner surface of the shell of the spherical shell type lamp.

And (3) splicing the two half spherical shells into a complete spherical shell type lamp shell, and bonding the joint by using heat-conducting silica gel. The top of the shell is screwed into the hanging ring 1 in a threaded connection mode.

PMMA and Polystyrene (PS) are dissolved in toluene in a mass ratio of 3:1 to prepare a saturated solution, and the toluene is evaporated to obtain the PMMA-PS plastic. Injecting PMMA-PS plastic into a mold, forming the light-emitting mask by using a flexible forming mold or blow molding, and mechanically sanding by using a grinding wheel or enabling the inner surface of the mold to be a rough surface with small particles so as to enable the light-emitting mask to obtain a rough surface. Tetrahydrofuran (THF) is used for soaking the light-emitting mask, PS components in PMMA-PS plastics are dissolved, and a micropore structure with a scattering effect and a size of 2-15 micrometers is obtained on the surface of the light-emitting mask, as shown in figure 4. The light-emitting mask is adhered to the bottom of the lamp shell to cover the opening. And the edge of the edge pressing structure used for installing the light-emitting mask is flush with the edge of the opening of the lamp shell, so that light is prevented from being shielded, and the light-emitting angle is not limited.

The number of the arc-shaped heat pipes is four, the arc-shaped heat pipes are arranged on the outer surface of the upper hemisphere of the spherical shell at intervals of 90 degrees according to longitude positions in an equidistant mode, and heat-conducting silicon glue is bonded on the outer surface.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any equivalent changes, modifications or evolutions made by those skilled in the art to the above embodiments by using the technical solutions of the present invention still belong to the scope of the technical solutions of the present invention.

Claims

1. A reflective LED lamp based on diffuse reflection nano spinning is characterized by comprising a heat pipe radiator (2), a lamp shell (3), a nano spinning reflecting surface (4) with a diffuse reflection effect, an LED light source, an LED substrate (5) and a light outlet mask (6) with a micropore soft light structure; the utility model discloses a LED light source, including lamps and lanterns shell (3), lamp shell (3) internal face laminating has nanometer spinning plane of reflection (4) that have the diffuse reflection effect, heat pipe radiator (2) are installed to lamp shell (3) outer wall, lamp shell (3) bottom sets up the opening, the light-emitting face guard (6) that the opening part installation contains micropore sheen structure, LED device and LED base plate (5) are installed to lamp shell (3) opening flange internal face, and the LED base plate is the curved surface structure of round platform side, and the LED device is annular array in the inboard of LED base plate and arranges for the oblique angle is personally submitted with the level to the light that the LED light source sent and is jetted out from light-emitting face guard (6) that contain micropore sheen structure.

2. The reflective LED lamp of claim 1, wherein the nano-spun reflective surface (4) with diffuse reflection effect is made by spinning polyacrylonitrile Plastic (PAN) on a poly-terephthalic Plastic (PET) film and pressing, and the diameter of the electrostatic spinning fiber is 80-200 nm; the light-emitting mask (6) with the micropore soft light structure is rough in surface and has micropores with micron sizes and diffusion effects.

3. The reflective LED lamp as claimed in claim 1, wherein the heat pipe radiator (2) is installed on the outer surface of the lamp housing (3) in a shape of a spherical shell in a longitudinal arrangement, the lamp housing (3) is in a shape of a spherical shell, and the lamp housing (3) is made of copper or aluminum.

4. The reflective LED lamp of claim 1, wherein the number of LED devices is 6 to 20, and the LED light source illumination elevation angle is set to 23 ± 1 ° for optimal brightness uniformity.

5. The reflective LED lamp of claim 1, wherein a heat-conducting silica gel is coated between the heat pipe radiator (2) and the lamp housing (3) and between the LED substrate (5) and the lamp housing (3).

6. The reflective LED lamp according to claim 1, wherein the top of the lamp housing (3) is provided with a hanging ring (1), the lamp circuit is mounted on the outer side of the LED substrate, and the power line is buried between the nano-spun reflecting surface (4) with diffuse reflection effect and the housing (3) and LED out from the opening near the top of the lamp.