CN107101121B

CN107101121B - LED device

Info

Publication number: CN107101121B
Application number: CN201710450367.7A
Authority: CN
Inventors: 付万琴; 单龙; 王际辉; 胡学功
Original assignee: Institute of Engineering Thermophysics of CAS
Current assignee: Institute of Engineering Thermophysics of CAS
Priority date: 2017-06-14
Filing date: 2017-06-14
Publication date: 2023-09-29
Anticipated expiration: 2037-06-14
Also published as: CN107101121A

Abstract

The invention provides an LED device, comprising: the LED lamp comprises an LED light source, a plurality of radiating fins and a fixing frame, wherein the fixing frame is used for fixing the radiating fins, the radiating fins are arranged at intervals, and the radiating fins are made of metal; the LED light source is arranged on the radiating fin and faces one side of the center of the fixing frame. The LED device provided by the invention has good heat dissipation effect, can adjust light quality, light intensity and illumination period, improves the light energy utilization rate, can provide a better illumination environment for the cultivation of organisms requiring illumination, and can also shorten the cultivation period of the organisms.

Description

LED device

Technical Field

The invention relates to the field of LEDs, in particular to an LED device.

Background

In recent years, microalgae culture has been receiving a great deal of attention in the fields of food processing industry, aquaculture industry, medicine and beauty industry, bioenergy and water environment restoration, etc., and microalgae related products are developed into an emerging technical industry, so that LED (light emitting diode) devices for biological culture containers are also of great importance. Microalgae high-density culture is a key link for improving microalgae biomass yield and active metabolites and developing biomass energy.

Illumination is the most important environmental factor affecting photosynthesis and growth of microalgae, and light intensity, light quality and photoperiod all affect photosynthetic efficiency of microalgae. At light intensities within the tolerance range, microalgae photosynthesis will gradually increase with increasing light intensity.

The LED lamp has high electro-optic conversion efficiency, is different from a fluorescent lamp, has less heat generation, and can realize low-heat load light filling; the LED light source can also adjust the light intensity, the light quality and the light period according to the type and the growth period of the microalgae, so that the best cultivation effect is achieved, and the cultivation period is shortened.

However, the existing LED microalgae culturing lamp mainly adopts plastic as a lamp holder, and an LED light source is stuck on the plastic lamp holder, so that the heat dissipation effect is poor due to low plastic heat conductivity coefficient, and the power of the culturing lamp is only about ten watts. When the concentration of algae and the size of the culture vessel are large, the illumination generated by the low power culture lamp is insufficient to optimize the cultivation of microalgae.

Disclosure of Invention

First, the technical problem to be solved

The present invention is directed to an LED device, which solves at least one of the above-mentioned problems.

(II) technical scheme

The invention provides an LED device, comprising: the LED light source, a plurality of radiating fins and a fixing frame, wherein,

the fixing frame is used for fixing the radiating fins, the radiating fins are arranged at intervals, and the radiating fins are made of metal;

the LED light source is arranged on the radiating fin and faces one side of the center of the fixing frame.

Optionally, the fixing frame may be two pairs of fixing frames disposed opposite to each other, and the inner side edge of the fixing frame is fixed with the cooling fin.

Optionally, the LED device may further include: a driving power supply, a dimming controller and a timing module, wherein,

the driving power supply is electrically connected with the LED light source and is used for supplying power to the LED light source;

the dimming controller is electrically connected between the LED light source and the driving power supply and used for adjusting the light quality and the light intensity of the LED light source, and the LED light source is an LED light source with an adjustable three-primary-color light mode;

and the timing module is electrically connected with the input end of the driving power supply and used for controlling the illumination period of the LED light source.

Alternatively, each pair of fixing frame combination can be in a circular ring shape or a rectangular frame shape.

Optionally, the two pairs of fixing frames can be fixed by a screw and a nut, one end of each pair of fixing frames is connected by a hinge, and the other end is connected by a hasp.

Optionally, the spacing between two heat sinks on two sides of the buckle is larger than the spacing between any two adjacent heat sinks.

Alternatively, notches may be provided on the opposite surfaces of the two pairs of fixing frames for inserting and fixing the heat sink.

Alternatively, the heat sink may be a solid structure or a hollow structure including a flat tube and at least one heat pipe.

Optionally, the flat tube may be a flat sealing body with an upper plane and a lower plane and a gap in the middle, and the flat tube may be made of aluminum alloy, copper or stainless steel, and may be in a cuboid shape; the heat conducting fin is arranged inside the flat tube, is connected with the upper tube wall and the lower tube wall of the flat tube and penetrates through the two ends of the flat tube, the heat conducting fin divides the interior of the flat tube into a plurality of cavities, and phase-change heat conducting liquid is filled inside the cavities.

Optionally, aluminum foil or reflective paper may be disposed between adjacent heat sinks.

(III) beneficial effects

Compared with the prior art, the invention has the following advantages:

1. according to the LED device, the radiating fins are arranged at intervals along the edge of the fixing frame to form a hollowed-out structure, so that the weight of the whole LED device can be reduced; placing the biological culture container at the center of the lamp, and uniformly and sufficiently illuminating; because the radiating fin is made of metal materials, when the flat tube and the heat conducting fin are adopted, the phase change heat conducting liquid is filled in the cavity of the flat tube, and the heat taking speed can be improved, so that the LED device has a good radiating effect, and the power of the lamp can be improved to be more than 100W.

2. The invention comprises a circuit for regulating and controlling illumination, and can realize the dimming of the LED lamp so as to adapt to the light quality and the light intensity required by different organisms, thereby realizing different cultivation stages aiming at different organisms, achieving the best cultivation effect and shortening the cultivation period.

Drawings

Fig. 1 is a schematic structural diagram of an LED device according to an embodiment of the present invention;

FIG. 2 is a top view of an LED device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fixing frame according to an embodiment of the invention.

Detailed Description

Generally, the existing LED microalgae cultivation lamp system adopts plastic as a lamp bracket, but an LED light source adhered to the plastic generates a large amount of heat, and the plastic has low heat conductivity coefficient, so that the existing LED system has poor heat dissipation effect. Aiming at the technical problems and other disadvantages, the invention provides an LED device which can be used for a biological culture container and has the advantages of good heat dissipation effect, high power, light adjustment and settable illumination period, thereby solving the technical problems that the existing fluorescent lamp culture lamp cannot adjust light quality, the heat dissipation effect of a plastic lamp bracket LED system is poor and the power is low.

The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.

Fig. 1 is a schematic structural diagram of an LED device according to an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides an LED device, including: the LED light source 1, the heat sink 2 and two pairs of fixing frames 3 which are placed opposite to each other from top to bottom (the fixing frames are not limited to fixed positions in other embodiments).

The radiating fins 2 are arranged at intervals on the inner side edge of the fixing frame 3 to form a hollow structure, and the radiating fins can be made of metal, wherein the metal can be aluminum, copper, stainless steel or other metals; the LED light sources 1 are disposed on the heat sink 2 and face one side of the center of the fixing frame 3 (in this embodiment, the LED light sources 1 are selectively adhered to the heat sink 2), the LED light sources 1 on two adjacent heat sinks 2 are connected in series by wires, the fixing frame 3 is used for fixing the heat sink 2, and the fixing frame 3 may be made of other plastics such as PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene copolymer), or metals such as aluminum, stainless steel, etc. Each pair of fixing frames 3 is combined to be circular, rectangular frame or other shapes, in the embodiment, the circular fixing frames 3 are selected, the radiating fins 2 and the fixing frames 3 form a hollow cylinder shape and are hollow structures, the weight of the whole LED device can be reduced, and meanwhile, heat can be dissipated through external air quickly, so that a better heat dissipation effect is achieved.

The heat sink 2 may be a solid structure or a hollow structure including a flat tube and at least one heat conduction tube. In this embodiment, the heat sink 2 has a hollow structure, the flat tube is a flat sealing body with upper and lower planes and a gap in the middle, the flat tube can be made of aluminum alloy, copper, stainless steel or other metals, and has a rectangular parallelepiped shape, the thickness of the flat tube is 0.5-30 mm, the width is 10-100 mm, the length is 50-2000 mm, and the wall thickness of the flat tube is 0.5-1 mm. The heat conducting fins are arranged inside the flat tube, are connected with the upper tube wall and the lower tube wall of the flat tube and penetrate through the two ends of the flat tube, the thickness of each heat conducting fin is 1-5 mm, and the width of a cavity between every two adjacent heat conducting fins is 0.5-5 mm. At least one heat conducting fin divides the interior of the flat tube into a plurality of cavities, and phase-change heat conducting liquid is filled in the cavities. When the LED light source 1 works, the phase-change heat-conducting liquid inside the radiating fin 2 is heated to generate high-intensity boiling phase change, so that heat generated by the LED light source 1 is quickly taken away, transferred to the other surface opposite to the radiating fin 2 sticking light source, and dissipated to the environment through convection heat exchange between the surface of the radiating fin 2 and ambient air. The high-intensity boiling phase change greatly improves the heat radiation performance of the LED lamp, reduces the light attenuation of the light source, prolongs the service life of the light source and ensures the operation reliability of the lamp while improving the power of the culturing lamp.

In addition, aluminum foil or reflective paper may be adhered between the adjacent heat sinks 2 for improving the light energy utilization rate of the LED light source 1.

According to an embodiment of the present invention, the LED device further includes: a driving power supply, a dimming controller and a timing module. The driving power supply is connected with the plurality of LED light sources 1 connected in series by wires to realize electrical connection and is used for supplying power to the LED light sources 1; the dimming controller is connected between the LED light source 1 and the driving power supply, so that electric connection is realized, the dimming controller is used for adjusting the light quality and the light intensity of the LED light source 1, and the LED light source 1 is an adjustable LED light source 1 in a three-primary color light mode RGB (three-primary color light mode); and the timing module is connected with the input end of the driving power supply so as to realize electric connection and is used for controlling the illumination period of the LED light source 1. The circuit for regulating and controlling illumination can realize dimming of the LED lamp with high power so as to adapt to light quality and light intensity required by different organisms, thereby realizing different cultivation stages aiming at different organisms, achieving the best cultivation effect and shortening the cultivation period.

Fig. 2 is a top view of an LED device according to an embodiment of the present invention, as shown in fig. 2, in this embodiment, each fixing frame 3 adopts a semicircular shape (other shapes may be selected in other embodiments), the combination is a circular shape, and the upper and lower pairs of fixing frames 3 and the heat sink fixed between the fixing frames 3 have a hollow cylinder shape. A plurality of small holes are cut on the opposite surfaces of the upper and lower pairs of fixing frames 3, the upper and lower pairs of fixing frames 3 are fixed by screw rods and nuts through the small holes, and the distance between the two pairs of fixing frames 3 is 100-2000 mm. In addition, one end of each pair of upper and lower fixing frames 3 can be connected through a hinge 4, so that two groups of fixing frames 3 can rotate by taking a rotating shaft of the hinge 4 as an axle center, and the pair of fixing frames 3 on the same surface can relatively and freely move separately to form an angle (the maximum obtuse angle), thereby realizing the opening and closing of the lamp bracket. In this way, the biological growth container can be easily placed or removed. The other end can be connected through a hasp 5, when the hasp 5 is closed, each pair of upper and lower fixing frames 3 forms a closed circular ring shape, and the fixing frames 3 are tightly locked together; when the buckles 5 are released, each pair of fixing frames 3 can rotate around the rotation shaft of the hinge 4, and each pair of fixing frames 3 are separated so as to place or take out the biological culture container. Wherein, the hasp 5 and the hinge 4 are fixed on the fixing frame 3 through small holes by screws. In addition, it is preferable that the distance between two heat radiating fins near both sides of the buckle 5 is set to be larger than the distance between any two adjacent heat radiating fins, so that the biological culture container can be placed or taken out more conveniently and quickly through the connection circuit of the LED device and the culture container pipeline. In this embodiment. Because each group of fixing frames 3 are combined to form a circular ring, the radiating fins 2 are circularly arranged between the upper fixing frame 331 and the lower fixing frame 331, and the angles of the centers of the two adjacent radiating fins are 5 degrees to 30 degrees.

Fig. 3 is a schematic structural diagram of a fixing frame 3 according to an embodiment of the present invention, as shown in fig. 3, rectangular slots 33 (in other embodiments, the slots 33 may be in other shapes) are provided on opposite surfaces of two sets of fixing frames 3, and the length of the slots 33 may be 10.5-100.5 mm, the width may be 1-30.5 mm, and the depth may be 1-25 mm, for inserting and fixing heat dissipation fins. In addition, the screw and nut pass through the small holes 34 to fix the upper and lower pairs of fixing frames 3, the buckle is fixed on the fixing frames 3 through the small holes 36, and the hinge is fixed on the fixing frames 3 through the small holes 35.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the invention thereto, but to limit the invention thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the invention.

Claims

1. An LED device suitable for use in a biological growth vessel, comprising:

the LED light source, a plurality of radiating fins and a fixing frame, wherein,

the fixing frame is used for fixing the radiating fins, the radiating fins are arranged at intervals and form a hollowed-out structure, the radiating fins comprise metal, one end of the fixing frame is connected through a hinge, the other end of the fixing frame is connected through a hasp, and the fixing frame is opened or closed so as to place the biological culture container in the central position of the fixing frame or take the biological culture container out of the fixing frame;

2. The LED device of claim 1, wherein the mount is two pairs of mounts placed opposite one another, with the heat sink secured to the inner edges thereof.

3. The LED apparatus of claim 1 further comprising: a driving power supply, a dimming controller and a timing module, wherein,

4. The LED device of claim 2, wherein each pair of mount combinations is in the shape of a circular ring or rectangular frame.

5. The LED apparatus of claim 2 wherein the two pairs of mounts are secured by a screw and nut.

6. The LED device of claim 5, wherein the spacing of two heat sinks on each side of the buckle is greater than the spacing of any other two adjacent heat sinks.

7. The LED device of claim 2, wherein notches are provided on opposite surfaces of the two pairs of holders for the insertion of the heat sink.

8. The LED device of claim 1, wherein the heat sink is a solid structure or a hollow structure comprising a flat tube and at least one heat conducting tube.

9. The LED device of claim 8, wherein the flat tube is a flat sealing body with an upper plane and a lower plane and a gap in the middle, and is made of aluminum alloy, copper or stainless steel and is rectangular; the heat conducting fin set up in inside the flat pipe, connect the upper and lower pipe wall of flat pipe and run through flat pipe both ends, the heat conducting fin will the inside partition of flat pipe becomes a plurality of cavitys, the cavity is inside to be filled with phase transition heat conduction liquid.

10. The LED device of claim 1, wherein aluminum foil or light reflecting paper is disposed between adjacent heat sinks.