CN114415359A

CN114415359A - Lighting device based on solar energy convergence power generation

Info

Publication number: CN114415359A
Application number: CN202210062724.3A
Authority: CN
Inventors: 周帆; 周子博; 冯昱嘉; 李思微; 赵玉新
Original assignee: National University of Defense Technology
Current assignee: National University of Defense Technology
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-04-29

Abstract

The invention discloses a lighting device based on solar energy convergence power generation, which comprises a reflection assembly, a support assembly and an optical fiber, wherein the reflection assembly is arranged on the support assembly, and the support assembly is provided with a driving mechanism for driving the reflection assembly to rotate and/or pitch on the support assembly; the reflecting assembly comprises a primary reflecting unit, a secondary reflecting unit and a light condensing unit, wherein the primary reflecting unit is provided with a large-caliber paraboloid first reflecting surface, and the secondary reflecting unit is provided with a small-caliber second reflecting surface; one end of the secondary reflection unit facing the sunlight is provided with a thermoelectric sheet, one side of the thermoelectric sheet facing the sunlight is provided with a heat dissipation mechanism, and the thermoelectric sheet is electrically connected with the driving mechanism. According to the lighting device, through the arrangement of the thermoelectric piece and the heat dissipation mechanism, the thermoelectric piece can convert energy contained in high temperature into electric energy, and meanwhile, the temperature is reduced to a certain degree, so that the infrared heat effect in sunlight is effectively utilized, and power is supplied to the light following process of the lighting device.

Description

Lighting device based on solar energy convergence power generation

Technical Field

The invention relates to the technical field of lighting devices, in particular to a lighting device based on solar energy convergence power generation.

Background

The sunlight guiding illumination system is characterized in that the sunlight energy optical fiber guiding system is arranged on outdoor roofs, balconies, floors, walls and other places which can be irradiated with sunlight all the year round and is connected into the indoor space through optical cables, and therefore the sunlight is directly irradiated into the indoor space from the rising to the falling of the sun every day. The sunlight collecting device is a core part of the sunlight guide-in illuminating system, the lighting efficiency of the sunlight collecting device directly influences the illuminating effect and the overall cost of the guide-in sunlight illuminating system, and in order to effectively guarantee the lighting efficiency of the sunlight collecting device, the sunlight collecting device needs to be driven to deflect along with the sun. Most daylighting devices among the prior art all adopt external power source, or choose to adopt the mode of photovoltaic board electricity generation to be used for the daylighting device, but often can produce higher temperature after the sunlight is assembled, and the photovoltaic board can lose efficacy even to the light energy conversion efficiency under high temperature environment, and the photovoltaic board electricity generation can lose partial light energy moreover, produces the side effect.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the lighting device based on solar energy convergence power generation, which effectively utilizes the infrared heat effect in sunlight so as to supply power for the light following process of the lighting device.

In order to achieve the above purpose, the invention provides a lighting device based on solar energy convergence power generation, which comprises a reflection assembly, a support assembly and an optical fiber, wherein the reflection assembly is arranged on the support assembly, and the support assembly is provided with a driving mechanism for driving the reflection assembly to rotate and/or pitch on the support assembly;

the reflecting assembly comprises a primary reflecting unit, a secondary reflecting unit and a light condensing unit, wherein the primary reflecting unit is provided with a first reflecting surface of a large-caliber paraboloid shape, and the secondary reflecting unit is provided with a second reflecting surface of a small caliber;

the second reflecting surface is positioned near the focus of the first reflecting surface and is opposite to the first reflecting surface, a through hole is formed in the position, opposite to the second reflecting surface, of the primary reflecting unit, the light condensing unit is positioned between the second reflecting surface and the through hole, and one end of the optical fiber penetrates through the through hole and then is positioned at the focus of the light condensing unit;

one end, facing the sunlight, of the secondary reflection unit is provided with a thermoelectric sheet, a heat dissipation mechanism is arranged on one side, facing the sunlight, of the thermoelectric sheet, and the thermoelectric sheet is electrically connected with the driving mechanism.

Preferably, the supporting component comprises a foot rest, a vertical shaft and a horizontal shaft, and the driving mechanism comprises an electric cylinder and a motor;

the bottom end of the vertical shaft is rotatably connected to the foot rest, the motor is arranged on the foot rest and is in transmission connection with the vertical shaft, and the top end of the vertical shaft penetrates through the through hole and then is positioned in front of the first reflecting surface;

the horizontal shaft is fixedly arranged on the vertical shaft and is vertical to the vertical shaft, the primary reflection unit is rotatably connected to the horizontal shaft, one end of the electric cylinder is hinged to the vertical shaft, the other end of the electric cylinder is hinged to the primary reflection unit, and the telescopic direction of the electric cylinder is vertical to the horizontal shaft.

Preferably, the device further comprises a connecting assembly, and the secondary reflection unit and the light condensation unit are fixedly connected with the primary reflection unit through the connecting assembly.

Preferably, the connecting assembly comprises a fixing ring and a connecting rod;

one end of the fixing ring is fixedly connected with the primary reflection unit through a first supporting rod, the other end of the fixing ring is hinged with the top end of the vertical shaft through a second supporting rod, and the light condensation unit is fixedly arranged on the fixing ring;

the quantity of connecting rod is a plurality of, and the one end of a plurality of connecting rods is connected along annular interval gu fixed ring is last, the other end to keeping away from one-level reflection unit's direction extend and with second grade reflection unit is fixed continuous.

Preferably, the sunlight collecting device further comprises a control assembly, wherein the control assembly is electrically connected with the driving mechanism and is used for controlling the driving mechanism to operate, so that the first reflecting surface is kept opposite to the sunlight.

Preferably, the control assembly comprises a controller and four photosensitive mechanisms;

the four photosensitive mechanisms are distributed at the edge of the first reflecting surface in a cross-shaped symmetrical structure and comprise four baffle plates and a photosensitive resistance module, and the baffle plates are tightly attached to one side, close to the center of the first reflecting surface, of the photosensitive resistance module;

each photosensitive resistance module is electrically connected with the controller, and the controller is electrically connected with the driving mechanism.

Preferably, the control process of the control assembly is as follows:

and (3) light following starting judgment: collecting analog signals output by the four photoresistor modules, judging whether the current sun-facing error reaches a light-following threshold value or not based on the four analog signals, if so, performing light-following operation, otherwise, stopping light-following and performing light-following starting judgment again after a first preset time period;

light following operation: and (3) subtracting every two analog signals output by the photoresistor modules at opposite positions in the four analog signals, judging whether the difference value is larger than an error threshold value, if so, controlling the electric cylinder and/or the motor to operate until all the difference values are smaller than or equal to the error threshold value, and performing light chasing operation after a second preset time period, otherwise, directly performing light chasing operation, wherein one light chasing starting judgment is performed between each light chasing operation.

The invention provides a lighting device based on solar energy convergence power generation, which firstly converges sunlight on a second emitting surface through a first reflecting surface, and then converges the sunlight through the reflection of the second reflecting surface and a light-converging unit, and then the sunlight is guided into a lighting system; and through setting up thermoelectric piece and heat dissipation mechanism in this application, the thermoelectric piece can be with the energy conversion that contains in this high temperature for the electric energy, also the certain degree reduce temperature simultaneously, utilizes the infrared heat effect in the sunlight effectively, for the chasing after the light process power supply of daylighting device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Figure 1 is a first isometric view of a daylighting apparatus in an embodiment of the invention;

figure 2 is a second perspective view of a daylighting device in an embodiment of the invention;

FIG. 3 is a schematic diagram of a reflection optical path of a primary reflection unit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a reflection optical path of a secondary reflection unit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a converging light path of a light-condensing unit according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the distribution of the photosensitive mechanism on the primary reflective unit according to the embodiment of the present invention;

FIG. 7 is a cross-sectional view of a photosensitive mechanism on a primary reflective unit in an embodiment of the present invention.

Reference numerals: the device comprises a primary reflecting unit 1, a first reflecting surface 101, a through hole 102, a connecting ring 103, a connecting plate 104, a first connecting frame 105, a secondary reflecting unit 2, a second reflecting surface 201, a light condensing unit 3, a foot rest 401, a vertical shaft 402, a horizontal shaft 403, an electric cylinder 404, a motor 405, a second connecting frame 406, a telescopic shaft 407, a third connecting frame 408, a fixing ring 501, a connecting rod 502, a first supporting rod 503, a second supporting rod 504, a protective cover 6, a baffle 701, a photoresistor module 702, a thermoelectric sheet 8, a heat dissipation plate 801, a heat dissipation fan 802 and an optical fiber 9.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 7, the lighting device based on solar energy concentration power generation disclosed in this embodiment mainly includes a reflection assembly, a support assembly and an optical fiber 9, wherein the reflection assembly is disposed on the support assembly, and the support assembly is provided with a driving mechanism for driving the reflection assembly to perform a rotation motion and/or a pitching motion on the support assembly, so as to complete tracking of sunlight.

In this embodiment, the reflection assembly includes a first-stage reflection unit 1, a second-stage reflection unit 2, and a light-condensing unit 3. The primary reflecting unit 1 is a metal plate of a large-caliber paraboloid type, and the concave surface of the primary reflecting unit 1 is provided with an aluminized polyester film as the first reflecting surface 101, so that the primary reflecting unit 1 can collect sunlight of a larger area as much as possible. The secondary reflection unit 2 is a concave reflector with a small aperture, the concave surface of the secondary reflection unit is a second reflection surface 201, and the second reflection surface 201 is located near the focus of the first reflection surface 101 and faces the first reflection surface 101, so as to reflect the sunlight reflected by the primary reflection unit 1. A through hole 102 is formed in the position, opposite to the second reflecting surface 201, of the primary reflecting unit 1, the light condensing unit 3 is a fresnel lens located between the second reflecting surface 201 and the through hole 102, and one end of the optical fiber 9 passes through the through hole 102 and then is located at the focus of the light condensing unit 3.

The light path of sunlight in this embodiment is: after the sunlight irradiates the primary reflection unit 1, the sunlight is reflected by the first reflection surface 101 and then is emitted to the second reflection surface 201, which is shown in fig. 3; then, the light is reflected by the second reflecting surface 201 and then emitted to the fresnel lens in the form of parallel light, which is shown in fig. 4; finally, the fresnel lens converges and directs the parallel sunlight into the optical fiber 9, as shown in fig. 5.

In this embodiment, the supporting assembly includes a stand 401, a vertical shaft 402, and a horizontal shaft 403, and the driving mechanism includes an electric cylinder 404 and a motor 405. The bottom end of the vertical shaft 402 is rotatably supported and connected to the foot rest 401 through a bearing or a coupling, and is in transmission connection with the motor 405, and the top end of the vertical shaft 402 passes through the through hole 102 and then is located in front of the first reflecting surface 101. The transverse shaft 403 is fixedly welded on the vertical shaft 402 and is vertical to the vertical shaft 402, the primary reflection unit 1 is rotatably connected on the transverse shaft 403, one end of the electric cylinder 404 is hinged with the vertical shaft 402, the other end of the electric cylinder is hinged with the primary reflection unit 1, and the telescopic direction of the electric cylinder 404 is vertical to the transverse shaft 403. Specifically, a connecting ring 103 coaxial with the first reflecting surface 101 is welded on the convex surface of the primary reflecting unit 1, connecting plates 104 connected with the transverse shaft 403 and corresponding to the connecting ring 103 are arranged on the left side and the right side of the connecting ring 103, and two ends of the transverse shaft 403 are rotatably connected to the corresponding connecting plates 104; meanwhile, a first connecting frame 105 is arranged on the upper side or the lower side of the connecting ring 103, a second connecting frame 406 is arranged on the vertical shaft 402 and below the transverse shaft 403, one end of the electric cylinder 404 is hinged with the connecting ring 103 through the first connecting frame 105, and the other end of the electric cylinder is hinged with the vertical shaft 402 through the second connecting frame 406. When the electric cylinder 404 stretches, the connecting ring 103 drives the primary reflection unit 1 to rotate around the transverse shaft 403, so that the pitching degree of freedom of the primary reflection unit 1 on the support assembly is realized; when the click is started, the vertical shaft 402 drives the horizontal shaft 403 and the primary reflection unit 1 to rotate around the vertical shaft 402, so that the rotational freedom degree of the primary reflection unit 1 on the support assembly is realized.

In this embodiment, the one end of the secondary reflection unit 2 facing the sunlight is provided with the thermoelectric piece 8, and the side of the thermoelectric piece 8 facing the sunlight is provided with the heat dissipation mechanism, specifically, the heat dissipation mechanism includes a heat dissipation plate 801 and a heat dissipation fan 802, wherein the plane end of the heat dissipation plate 801 is connected with the side of the thermoelectric piece 8 facing the sunlight, and the air exhaust end of the heat dissipation fan 802 is connected with the heat dissipation end of the heat dissipation plate 801, wherein the number of the thermoelectric pieces 8 is multiple, specifically eight in this embodiment, and the heat dissipation mechanism is arranged in a square array. The secondary emission unit 2 transfers heat to the thermoelectric sheet 8, so that temperature difference occurs on two sides of the thermoelectric sheet 8, and the existence of the heat dissipation plate 801 and the heat dissipation fan 802 prevents the temperature of the thermoelectric sheet 8 on the outer side from being too high, maintains the temperature difference on two sides of the thermoelectric sheet 8, and further generates current. The thermoelectric piece 8 is electrically connected with a storage battery, and the storage battery is electrically connected with the electric cylinder 404, the motor 405 and the cooling fan 802 respectively, and is used for providing electric energy required by the light tracking process and the operation of the cooling fan 802, so that the whole lighting device does not need an external power supply, and energy conservation and emission reduction are really achieved while natural resources are reasonably utilized.

The working process of the lighting device in the embodiment is as follows: firstly, sunlight is converged on the second emitting surface 201 through the first reflecting surface 101, and then is converged through the second reflecting surface 201 and the light condensing unit 3 for guiding the sunlight into the illumination system, in the process, the secondary reflecting unit 2 can generate higher heat energy due to the convergence of the sunlight, and in the high-temperature environment, if a photovoltaic panel is adopted for power generation, the efficiency of the photovoltaic panel can be influenced or even the photovoltaic panel can be disabled due to overhigh temperature; and through setting up thermoelectric piece 8 and heat dissipation mechanism in this application, thermoelectric piece 8 can be the electric energy with the energy conversion who contains in this high temperature, also certain degree reduce temperature simultaneously, and the infrared heat effect in the sunlight is utilized effectively, follows the light process power supply for daylighting device.

In this embodiment, the lighting device still includes coupling assembling, and second grade reflection unit 2, spotlight unit 3 all link to each other with first-level reflection unit 1 is fixed through coupling assembling. Specifically, the connection assembly includes a fixing ring 501 and a connection rod 502, one end of the fixing ring 501 is fixedly connected to the primary reflection unit 1 through a first support rod 503, the other end of the fixing ring 501 is hinged to the top end of the vertical shaft 402 through a second support rod 504, and the light gathering unit 3 is fixedly arranged on the fixing ring 501. The number of connecting rods 502 is a plurality of, and the one end of a plurality of connecting rods 502 is connected on solid fixed ring 501 along annular interval, and the other end extends and links to each other with second grade reflection unit 2 is fixed to the direction of keeping away from first grade reflection unit 1. Specifically, the top end of the vertical shaft 402 is coaxially and slidably connected with a telescopic shaft 407, the top end of the telescopic shaft 407 is provided with a third connecting frame 408, the end of the second supporting rod 504 is hinged to the third connecting frame 408, and by means of the structural design, the primary reflection unit 1 is connected with the vertical shaft 402 and the transverse shaft 403 at the same time, so that the installation stability and the bearing uniformity of the whole device are guaranteed.

In a preferred embodiment, the fixing ring 501 is further provided with an infrared filtering unit, and the infrared filtering unit is located between the secondary reflecting unit 2 and the light condensing unit 3 to filter infrared rays in sunlight and reduce the influence of thermal effect on the optical fiber.

It should be noted that in the practical application process of the lighting device, different optical device parameters can be designed for products of different specifications, and the relative installation positions of the primary reflection unit 1, the secondary reflection unit 2, the light condensation unit 3, the optical fiber 9 interface and other elements can be easily obtained by using the ZEMAX original.

It should be noted that the light collecting device in this embodiment is not limited to the above-mentioned structure, and the primary reflecting unit 1, the secondary reflecting unit 2, and the light collecting unit 3 are not limited to the aluminum film metal plate (parabolic type), the concave reflecting mirror, and the fresnel lens, and other optical devices with the same function may be used instead.

Further preferably, the daylighting device further comprises a control component, and the control component is electrically connected with the electric cylinder 404 and the motor 405 respectively, so as to control the electric cylinder 404 and the motor 405 to operate, so that the first reflective surface 101 keeps facing the sunlight. Specifically, the control component includes a controller and four photosensitive mechanisms, the four photosensitive mechanisms are distributed at the edge of the first reflecting surface 101 in a cross-symmetric structure, the photosensitive mechanisms include a baffle 701 and a photosensitive resistance module 702, the baffle 701 is tightly attached to one side of the photosensitive resistance module 702 close to the center of the first reflecting surface 101, and the baffle 701 faces the center of the first reflecting surface 101 and is perpendicular to the axis of the first reflecting surface 101, that is, as shown in fig. 7. Each photo-resistor module 702 is electrically connected with a controller, the controller is electrically connected with the electric cylinder 404 and the motor 405 respectively, wherein the controller adopts an Arduino mainboard.

When the lighting device is not just facing to sunlight, the baffle can produce the shadow, and the photoresistor module receives illumination intensity different for the photoresistor module output analog signal size is different, and the operation of control motor 405 and/or electric jar 404 after Arduino mainboard processing, when the lighting device is just facing to sunlight, four photoresistor modules received illumination intensity the same, and motor 405 and/or electric jar 404 stall. Meanwhile, the sun moves relatively slowly relative to the earth, so that the light following process is designed to be started intermittently, and power consumption can be effectively reduced. The thermoelectric cells 8 generate excess electric energy to be stored in the accumulator for use elsewhere, for example for supplementary lighting in rainy weather. Meanwhile, the additive networking module can be arranged on the Arduino mainboard to realize remote adjustment of the intermittent starting time of the light following system and remotely and manually adjust the angle of the lighting device, so that the illumination brightness of the leading-in type sunlight lighting system is changed. Based on this, the control process of the control assembly in this embodiment is:

and (3) light following starting judgment: collecting analog signals output by the four photoresistor modules, judging whether the current sun-facing error reaches a light-following threshold value or not based on the four analog signals, if so, performing light-following operation, otherwise, stopping light-following and performing light-following starting judgment again after a first preset time period, wherein in the light-following starting judgment process, the difference value of any two groups of signals in the four groups of analog signals reaches the threshold value, namely the current sun-facing error reaches the light-following threshold value;

light following operation: subtracting every two analog signals output by the photoresistor modules at opposite positions in the four analog signals, judging whether the difference value is larger than an error threshold value, if so, controlling the electric cylinder and/or the motor to operate until all the difference values are smaller than or equal to the error threshold value, and performing light tracing operation after a second preset time period, otherwise, directly performing light tracing operation, wherein one light tracing starting judgment is performed between each light tracing operation; the photoresistor modules in opposite positions refer to the photoresistor modules in two photosensitive mechanisms with baffles parallel to each other.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A lighting device based on solar energy convergence power generation is characterized by comprising a reflection assembly, a support assembly and an optical fiber, wherein the reflection assembly is arranged on the support assembly, and the support assembly is provided with a driving mechanism for driving the reflection assembly to rotate and/or pitch on the support assembly;

2. A lighting device according to claim 1, wherein said supporting component comprises a foot stand, a vertical shaft and a horizontal shaft, and said driving mechanism comprises an electric cylinder and a motor;

3. A lighting device according to claim 2, further comprising a connecting assembly, wherein the secondary reflecting unit and the light focusing unit are both fixedly connected to the primary reflecting unit through the connecting assembly.

4. A lighting device according to claim 3, wherein said connecting assembly comprises a fixing ring and a connecting rod;

5. A lighting device according to claim 1, 2, 3 or 4, further comprising a control component electrically connected to said driving mechanism for controlling said driving mechanism to operate, so that said first reflecting surface is kept facing the sunlight.

6. A lighting device according to claim 5, wherein said control unit comprises a controller and four photosensitive mechanisms;

the four photosensitive mechanisms are distributed at the edge of the first reflecting surface in a cross-shaped symmetrical structure and comprise a baffle and a photosensitive resistance module, and the baffle is tightly attached to one side, close to the center of the first reflecting surface, of the photosensitive resistance module;

7. A lighting device based on solar energy concentration power generation according to claim 6, wherein the control process of the control component is as follows: